hba.c File Reference

#include "postgres.h"
#include <ctype.h>
#include <pwd.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "access/htup_details.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "common/ip.h"
#include "common/string.h"
#include "funcapi.h"
#include "libpq/ifaddr.h"
#include "libpq/libpq.h"
#include "miscadmin.h"
#include "postmaster/postmaster.h"
#include "regex/regex.h"
#include "replication/walsender.h"
#include "storage/fd.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/guc.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/varlena.h"

Include dependency graph for hba.c:

Go to the source code of this file.

Data Structures
struct	check_network_data
struct	HbaToken
struct	TokenizedLine

Macros
#define	MAX_TOKEN   256
#define	token_is_keyword(t, k)   (!t->quoted && strcmp(t->string, k) == 0)
#define	token_matches(t, k)   (strcmp(t->string, k) == 0)
#define	INVALID_AUTH_OPTION(optname, validmethods)
#define	REQUIRE_AUTH_OPTION(methodval, optname, validmethods)
#define	MANDATORY_AUTH_ARG(argvar, argname, authname)
#define	IDENT_FIELD_ABSENT(field)
#define	IDENT_MULTI_VALUE(tokens)
#define	MAX_HBA_OPTIONS   14
#define	NUM_PG_HBA_FILE_RULES_ATTS   9

Typedefs
typedef struct check_network_data	check_network_data
typedef struct HbaToken	HbaToken
typedef struct TokenizedLine	TokenizedLine

Functions
static MemoryContext	tokenize_file (const char *filename, FILE *file, List **tok_lines, int elevel)
static List *	tokenize_inc_file (List *tokens, const char *outer_filename, const char *inc_filename, int elevel, char **err_msg)
static bool	parse_hba_auth_opt (char *name, char *val, HbaLine *hbaline, int elevel, char **err_msg)
static ArrayType *	gethba_options (HbaLine *hba)
static void	fill_hba_line (Tuplestorestate *tuple_store, TupleDesc tupdesc, int lineno, HbaLine *hba, const char *err_msg)
static void	fill_hba_view (Tuplestorestate *tuple_store, TupleDesc tupdesc)
bool	pg_isblank (const char c)
static bool	next_token (char **lineptr, char *buf, int bufsz, bool *initial_quote, bool *terminating_comma, int elevel, char **err_msg)
static HbaToken *	make_hba_token (const char *token, bool quoted)
static HbaToken *	copy_hba_token (HbaToken *in)
static List *	next_field_expand (const char *filename, char **lineptr, int elevel, char **err_msg)
static bool	is_member (Oid userid, const char *role)
static bool	check_role (const char *role, Oid roleid, List *tokens)
static bool	check_db (const char *dbname, const char *role, Oid roleid, List *tokens)
static bool	ipv4eq (struct sockaddr_in *a, struct sockaddr_in *b)
static bool	hostname_match (const char *pattern, const char *actual_hostname)
static bool	check_hostname (hbaPort *port, const char *hostname)
static bool	check_ip (SockAddr *raddr, struct sockaddr *addr, struct sockaddr *mask)
static void	check_network_callback (struct sockaddr *addr, struct sockaddr *netmask, void *cb_data)
static bool	check_same_host_or_net (SockAddr *raddr, IPCompareMethod method)
static HbaLine *	parse_hba_line (TokenizedLine *tok_line, int elevel)
static void	check_hba (hbaPort *port)
bool	load_hba (void)
Datum	pg_hba_file_rules (PG_FUNCTION_ARGS)
static IdentLine *	parse_ident_line (TokenizedLine *tok_line)
static void	check_ident_usermap (IdentLine *identLine, const char *usermap_name, const char *pg_role, const char *ident_user, bool case_insensitive, bool *found_p, bool *error_p)
int	check_usermap (const char *usermap_name, const char *pg_role, const char *auth_user, bool case_insensitive)
bool	load_ident (void)
void	hba_getauthmethod (hbaPort *port)
const char *	hba_authname (UserAuth auth_method)

Variables
static List *	parsed_hba_lines = NIL
static MemoryContext	parsed_hba_context = NULL
static List *	parsed_ident_lines = NIL
static MemoryContext	parsed_ident_context = NULL
static const char *const	UserAuthName []

Macro Definition Documentation

IDENT_FIELD_ABSENT

#define IDENT_FIELD_ABSENT

(

field

)

Value:

do { \
    if (!field) { \
        ereport(LOG, \
                (errcode(ERRCODE_CONFIG_FILE_ERROR), \
                 errmsg("missing entry in file \"%s\" at end of line %d", \
                        IdentFileName, line_num))); \
        return NULL; \
    } \
} while (0)

Definition at line 929 of file hba.c.

IDENT_MULTI_VALUE

#define IDENT_MULTI_VALUE

(

tokens

)

Value:

do { \
    if (tokens->length > 1) { \
        ereport(LOG, \
                (errcode(ERRCODE_CONFIG_FILE_ERROR), \
                 errmsg("multiple values in ident field"), \
                 errcontext("line %d of configuration file \"%s\"", \
                            line_num, IdentFileName))); \
        return NULL; \
    } \
} while (0)

Definition at line 940 of file hba.c.

INVALID_AUTH_OPTION

#define INVALID_AUTH_OPTION	(		optname,
			validmethods
	)

Value:

do { \
    ereport(elevel, \
            (errcode(ERRCODE_CONFIG_FILE_ERROR), \
             /* translator: the second %s is a list of auth methods */ \
             errmsg("authentication option \"%s\" is only valid for authentication methods %s", \
                    optname, _(validmethods)), \
             errcontext("line %d of configuration file \"%s\"", \
                    line_num, HbaFileName))); \
    *err_msg = psprintf("authentication option \"%s\" is only valid for authentication methods %s", \
                        optname, validmethods); \
    return false; \
} while (0)

Definition at line 881 of file hba.c.

MANDATORY_AUTH_ARG

#define MANDATORY_AUTH_ARG	(		argvar,
			argname,
			authname
	)

Value:

do { \
    if (argvar == NULL) { \
        ereport(elevel, \
                (errcode(ERRCODE_CONFIG_FILE_ERROR), \
                 errmsg("authentication method \"%s\" requires argument \"%s\" to be set", \
                        authname, argname), \
                 errcontext("line %d of configuration file \"%s\"", \
                        line_num, HbaFileName))); \
        *err_msg = psprintf("authentication method \"%s\" requires argument \"%s\" to be set", \
                            authname, argname); \
        return NULL; \
    } \
} while (0)

Definition at line 901 of file hba.c.

MAX_HBA_OPTIONS

#define MAX_HBA_OPTIONS   14

Definition at line 2335 of file hba.c.

MAX_TOKEN

#define MAX_TOKEN   256

Definition at line 57 of file hba.c.

NUM_PG_HBA_FILE_RULES_ATTS

#define NUM_PG_HBA_FILE_RULES_ATTS   9

Definition at line 2451 of file hba.c.

REQUIRE_AUTH_OPTION

#define REQUIRE_AUTH_OPTION	(		methodval,
			optname,
			validmethods
	)

Value:

do { \
    if (hbaline->auth_method != methodval) \
        INVALID_AUTH_OPTION(optname, validmethods); \
} while (0)

Definition at line 895 of file hba.c.

token_is_keyword

#define token_is_keyword	(		t,
			k
	)		(!t->quoted && strcmp(t->string, k) == 0)

Definition at line 68 of file hba.c.

token_matches

#define token_matches	(		t,
			k
	)		(strcmp(t->string, k) == 0)

Definition at line 69 of file hba.c.

Typedef Documentation

check_network_data

typedef struct check_network_data check_network_data

HbaToken

typedef struct HbaToken HbaToken

TokenizedLine

typedef struct TokenizedLine TokenizedLine

Function Documentation

check_db()

static bool check_db ( const char *  dbname, const char *  role, Oid  roleid, List *  tokens  )

static

Definition at line 630 of file hba.c.

{
    ListCell   *cell;
    HbaToken   *tok;
 
    foreach(cell, tokens)
    {
        tok = lfirst(cell);
        if (am_walsender && !am_db_walsender)
        {
            /*
             * physical replication walsender connections can only match
             * replication keyword
             */
            if (token_is_keyword(tok, "replication"))
                return true;
        }
        else if (token_is_keyword(tok, "all"))
            return true;
        else if (token_is_keyword(tok, "sameuser"))
        {
            if (strcmp(dbname, role) == 0)
                return true;
        }
        else if (token_is_keyword(tok, "samegroup") ||
                 token_is_keyword(tok, "samerole"))
        {
            if (is_member(roleid, dbname))
                return true;
        }
        else if (token_is_keyword(tok, "replication"))
            continue;           /* never match this if not walsender */
        else if (token_matches(tok, dbname))
            return true;
    }
    return false;
}

References am_db_walsender, am_walsender, dbname, is_member(), lfirst, token_is_keyword, and token_matches.

Referenced by check_hba().

check_hba()

static void check_hba ( hbaPort *  port )

static

Definition at line 2121 of file hba.c.

{
    Oid         roleid;
    ListCell   *line;
    HbaLine    *hba;
 
    /* Get the target role's OID.  Note we do not error out for bad role. */
    roleid = get_role_oid(port->user_name, true);
 
    foreach(line, parsed_hba_lines)
    {
        hba = (HbaLine *) lfirst(line);
 
        /* Check connection type */
        if (hba->conntype == ctLocal)
        {
            if (!IS_AF_UNIX(port->raddr.addr.ss_family))
                continue;
        }
        else
        {
            if (IS_AF_UNIX(port->raddr.addr.ss_family))
                continue;
 
            /* Check SSL state */
            if (port->ssl_in_use)
            {
                /* Connection is SSL, match both "host" and "hostssl" */
                if (hba->conntype == ctHostNoSSL)
                    continue;
            }
            else
            {
                /* Connection is not SSL, match both "host" and "hostnossl" */
                if (hba->conntype == ctHostSSL)
                    continue;
            }
 
            /* Check GSSAPI state */
#ifdef ENABLE_GSS
            if (port->gss && port->gss->enc &&
                hba->conntype == ctHostNoGSS)
                continue;
            else if (!(port->gss && port->gss->enc) &&
                     hba->conntype == ctHostGSS)
                continue;
#else
            if (hba->conntype == ctHostGSS)
                continue;
#endif
 
            /* Check IP address */
            switch (hba->ip_cmp_method)
            {
                case ipCmpMask:
                    if (hba->hostname)
                    {
                        if (!check_hostname(port,
                                            hba->hostname))
                            continue;
                    }
                    else
                    {
                        if (!check_ip(&port->raddr,
                                      (struct sockaddr *) &hba->addr,
                                      (struct sockaddr *) &hba->mask))
                            continue;
                    }
                    break;
                case ipCmpAll:
                    break;
                case ipCmpSameHost:
                case ipCmpSameNet:
                    if (!check_same_host_or_net(&port->raddr,
                                                hba->ip_cmp_method))
                        continue;
                    break;
                default:
                    /* shouldn't get here, but deem it no-match if so */
                    continue;
            }
        }                       /* != ctLocal */
 
        /* Check database and role */
        if (!check_db(port->database_name, port->user_name, roleid,
                      hba->databases))
            continue;
 
        if (!check_role(port->user_name, roleid, hba->roles))
            continue;
 
        /* Found a record that matched! */
        port->hba = hba;
        return;
    }
 
    /* If no matching entry was found, then implicitly reject. */
    hba = palloc0(sizeof(HbaLine));
    hba->auth_method = uaImplicitReject;
    port->hba = hba;
}

References HbaLine::addr, HbaLine::auth_method, check_db(), check_hostname(), check_ip(), check_role(), check_same_host_or_net(), HbaLine::conntype, ctHostGSS, ctHostNoGSS, ctHostNoSSL, ctHostSSL, ctLocal, HbaLine::databases, get_role_oid(), HbaLine::hostname, HbaLine::ip_cmp_method, ipCmpAll, ipCmpMask, ipCmpSameHost, ipCmpSameNet, IS_AF_UNIX, lfirst, HbaLine::mask, palloc0(), parsed_hba_lines, port, HbaLine::roles, and uaImplicitReject.

Referenced by hba_getauthmethod().

check_hostname()

static bool check_hostname ( hbaPort *  port, const char *  hostname  )

static

Definition at line 713 of file hba.c.

{
    struct addrinfo *gai_result,
               *gai;
    int         ret;
    bool        found;
 
    /* Quick out if remote host name already known bad */
    if (port->remote_hostname_resolv < 0)
        return false;
 
    /* Lookup remote host name if not already done */
    if (!port->remote_hostname)
    {
        char        remote_hostname[NI_MAXHOST];
 
        ret = pg_getnameinfo_all(&port->raddr.addr, port->raddr.salen,
                                 remote_hostname, sizeof(remote_hostname),
                                 NULL, 0,
                                 NI_NAMEREQD);
        if (ret != 0)
        {
            /* remember failure; don't complain in the postmaster log yet */
            port->remote_hostname_resolv = -2;
            port->remote_hostname_errcode = ret;
            return false;
        }
 
        port->remote_hostname = pstrdup(remote_hostname);
    }
 
    /* Now see if remote host name matches this pg_hba line */
    if (!hostname_match(hostname, port->remote_hostname))
        return false;
 
    /* If we already verified the forward lookup, we're done */
    if (port->remote_hostname_resolv == +1)
        return true;
 
    /* Lookup IP from host name and check against original IP */
    ret = getaddrinfo(port->remote_hostname, NULL, NULL, &gai_result);
    if (ret != 0)
    {
        /* remember failure; don't complain in the postmaster log yet */
        port->remote_hostname_resolv = -2;
        port->remote_hostname_errcode = ret;
        return false;
    }
 
    found = false;
    for (gai = gai_result; gai; gai = gai->ai_next)
    {
        if (gai->ai_addr->sa_family == port->raddr.addr.ss_family)
        {
            if (gai->ai_addr->sa_family == AF_INET)
            {
                if (ipv4eq((struct sockaddr_in *) gai->ai_addr,
                           (struct sockaddr_in *) &port->raddr.addr))
                {
                    found = true;
                    break;
                }
            }
#ifdef HAVE_IPV6
            else if (gai->ai_addr->sa_family == AF_INET6)
            {
                if (ipv6eq((struct sockaddr_in6 *) gai->ai_addr,
                           (struct sockaddr_in6 *) &port->raddr.addr))
                {
                    found = true;
                    break;
                }
            }
#endif
        }
    }
 
    if (gai_result)
        freeaddrinfo(gai_result);
 
    if (!found)
        elog(DEBUG2, "pg_hba.conf host name \"%s\" rejected because address resolution did not return a match with IP address of client",
             hostname);
 
    port->remote_hostname_resolv = found ? +1 : -1;
 
    return found;
}

References addrinfo::ai_addr, addrinfo::ai_next, DEBUG2, elog, freeaddrinfo, getaddrinfo, hostname, hostname_match(), ipv4eq(), NI_MAXHOST, NI_NAMEREQD, pg_getnameinfo_all(), port, and pstrdup().

Referenced by check_hba().

check_ident_usermap()

static void check_ident_usermap ( IdentLine *  identLine, const char *  usermap_name, const char *  pg_role, const char *  ident_user, bool  case_insensitive, bool *  found_p, bool *  error_p  )

static

Definition at line 2839 of file hba.c.

{
    *found_p = false;
    *error_p = false;
 
    if (strcmp(identLine->usermap, usermap_name) != 0)
        /* Line does not match the map name we're looking for, so just abort */
        return;
 
    /* Match? */
    if (identLine->ident_user[0] == '/')
    {
        /*
         * When system username starts with a slash, treat it as a regular
         * expression. In this case, we process the system username as a
         * regular expression that returns exactly one match. This is replaced
         * for \1 in the database username string, if present.
         */
        int         r;
        regmatch_t  matches[2];
        pg_wchar   *wstr;
        int         wlen;
        char       *ofs;
        char       *regexp_pgrole;
 
        wstr = palloc((strlen(ident_user) + 1) * sizeof(pg_wchar));
        wlen = pg_mb2wchar_with_len(ident_user, wstr, strlen(ident_user));
 
        r = pg_regexec(&identLine->re, wstr, wlen, 0, NULL, 2, matches, 0);
        if (r)
        {
            char        errstr[100];
 
            if (r != REG_NOMATCH)
            {
                /* REG_NOMATCH is not an error, everything else is */
                pg_regerror(r, &identLine->re, errstr, sizeof(errstr));
                ereport(LOG,
                        (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
                         errmsg("regular expression match for \"%s\" failed: %s",
                                identLine->ident_user + 1, errstr)));
                *error_p = true;
            }
 
            pfree(wstr);
            return;
        }
        pfree(wstr);
 
        if ((ofs = strstr(identLine->pg_role, "\\1")) != NULL)
        {
            int         offset;
 
            /* substitution of the first argument requested */
            if (matches[1].rm_so < 0)
            {
                ereport(LOG,
                        (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
                         errmsg("regular expression \"%s\" has no subexpressions as requested by backreference in \"%s\"",
                                identLine->ident_user + 1, identLine->pg_role)));
                *error_p = true;
                return;
            }
 
            /*
             * length: original length minus length of \1 plus length of match
             * plus null terminator
             */
            regexp_pgrole = palloc0(strlen(identLine->pg_role) - 2 + (matches[1].rm_eo - matches[1].rm_so) + 1);
            offset = ofs - identLine->pg_role;
            memcpy(regexp_pgrole, identLine->pg_role, offset);
            memcpy(regexp_pgrole + offset,
                   ident_user + matches[1].rm_so,
                   matches[1].rm_eo - matches[1].rm_so);
            strcat(regexp_pgrole, ofs + 2);
        }
        else
        {
            /* no substitution, so copy the match */
            regexp_pgrole = pstrdup(identLine->pg_role);
        }
 
        /*
         * now check if the username actually matched what the user is trying
         * to connect as
         */
        if (case_insensitive)
        {
            if (pg_strcasecmp(regexp_pgrole, pg_role) == 0)
                *found_p = true;
        }
        else
        {
            if (strcmp(regexp_pgrole, pg_role) == 0)
                *found_p = true;
        }
        pfree(regexp_pgrole);
 
        return;
    }
    else
    {
        /* Not regular expression, so make complete match */
        if (case_insensitive)
        {
            if (pg_strcasecmp(identLine->pg_role, pg_role) == 0 &&
                pg_strcasecmp(identLine->ident_user, ident_user) == 0)
                *found_p = true;
        }
        else
        {
            if (strcmp(identLine->pg_role, pg_role) == 0 &&
                strcmp(identLine->ident_user, ident_user) == 0)
                *found_p = true;
        }
    }
}

References ereport, errcode(), errmsg(), IdentLine::ident_user, LOG, palloc(), palloc0(), pfree(), pg_mb2wchar_with_len(), pg_regerror(), pg_regexec(), IdentLine::pg_role, pg_strcasecmp(), pstrdup(), IdentLine::re, REG_NOMATCH, regmatch_t::rm_eo, regmatch_t::rm_so, and IdentLine::usermap.

Referenced by check_usermap().

check_ip()

static bool check_ip ( SockAddr *  raddr, struct sockaddr *  addr, struct sockaddr *  mask  )

static

Definition at line 806 of file hba.c.

{
    if (raddr->addr.ss_family == addr->sa_family &&
        pg_range_sockaddr(&raddr->addr,
                          (struct sockaddr_storage *) addr,
                          (struct sockaddr_storage *) mask))
        return true;
    return false;
}

References SockAddr::addr, and pg_range_sockaddr().

Referenced by check_hba(), and check_network_callback().

check_network_callback()

static void check_network_callback ( struct sockaddr *  addr, struct sockaddr *  netmask, void *  cb_data  )

static

Definition at line 820 of file hba.c.

{
    check_network_data *cn = (check_network_data *) cb_data;
    struct sockaddr_storage mask;
 
    /* Already found a match? */
    if (cn->result)
        return;
 
    if (cn->method == ipCmpSameHost)
    {
        /* Make an all-ones netmask of appropriate length for family */
        pg_sockaddr_cidr_mask(&mask, NULL, addr->sa_family);
        cn->result = check_ip(cn->raddr, addr, (struct sockaddr *) &mask);
    }
    else
    {
        /* Use the netmask of the interface itself */
        cn->result = check_ip(cn->raddr, addr, netmask);
    }
}

References check_ip(), ipCmpSameHost, check_network_data::method, pg_sockaddr_cidr_mask(), check_network_data::raddr, and check_network_data::result.

Referenced by check_same_host_or_net().

check_role()

static bool check_role ( const char *  role, Oid  roleid, List *  tokens  )

static

Definition at line 606 of file hba.c.

{
    ListCell   *cell;
    HbaToken   *tok;
 
    foreach(cell, tokens)
    {
        tok = lfirst(cell);
        if (!tok->quoted && tok->string[0] == '+')
        {
            if (is_member(roleid, tok->string + 1))
                return true;
        }
        else if (token_matches(tok, role) ||
                 token_is_keyword(tok, "all"))
            return true;
    }
    return false;
}

References is_member(), lfirst, HbaToken::quoted, HbaToken::string, token_is_keyword, and token_matches.

Referenced by check_hba().

check_same_host_or_net()

static bool check_same_host_or_net ( SockAddr *  raddr, IPCompareMethod  method  )

static

Definition at line 847 of file hba.c.

{
    check_network_data cn;
 
    cn.method = method;
    cn.raddr = raddr;
    cn.result = false;
 
    errno = 0;
    if (pg_foreach_ifaddr(check_network_callback, &cn) < 0)
    {
        ereport(LOG,
                (errmsg("error enumerating network interfaces: %m")));
        return false;
    }
 
    return cn.result;
}

References check_network_callback(), ereport, errmsg(), LOG, check_network_data::method, pg_foreach_ifaddr(), check_network_data::raddr, and check_network_data::result.

Referenced by check_hba().

check_usermap()

int check_usermap	(	const char *	usermap_name,
		const char *	pg_role,
		const char *	auth_user,
		bool	case_insensitive
	)

Definition at line 2974 of file hba.c.

{
    bool        found_entry = false,
                error = false;
 
    if (usermap_name == NULL || usermap_name[0] == '\0')
    {
        if (case_insensitive)
        {
            if (pg_strcasecmp(pg_role, auth_user) == 0)
                return STATUS_OK;
        }
        else
        {
            if (strcmp(pg_role, auth_user) == 0)
                return STATUS_OK;
        }
        ereport(LOG,
                (errmsg("provided user name (%s) and authenticated user name (%s) do not match",
                        pg_role, auth_user)));
        return STATUS_ERROR;
    }
    else
    {
        ListCell   *line_cell;
 
        foreach(line_cell, parsed_ident_lines)
        {
            check_ident_usermap(lfirst(line_cell), usermap_name,
                                pg_role, auth_user, case_insensitive,
                                &found_entry, &error);
            if (found_entry || error)
                break;
        }
    }
    if (!found_entry && !error)
    {
        ereport(LOG,
                (errmsg("no match in usermap \"%s\" for user \"%s\" authenticated as \"%s\"",
                        usermap_name, pg_role, auth_user)));
    }
    return found_entry ? STATUS_OK : STATUS_ERROR;
}

References check_ident_usermap(), ereport, errmsg(), error(), lfirst, LOG, parsed_ident_lines, pg_strcasecmp(), STATUS_ERROR, and STATUS_OK.

Referenced by auth_peer(), and ident_inet().

copy_hba_token()

static HbaToken* copy_hba_token ( HbaToken *  in )

static

Definition at line 313 of file hba.c.

{
    HbaToken   *out = make_hba_token(in->string, in->quoted);
 
    return out;
}

References make_hba_token(), HbaToken::quoted, and HbaToken::string.

Referenced by parse_hba_line(), and tokenize_inc_file().

fill_hba_line()

static void fill_hba_line ( Tuplestorestate *  tuple_store, TupleDesc  tupdesc, int  lineno, HbaLine *  hba, const char *  err_msg  )

static

Definition at line 2466 of file hba.c.

{
    Datum       values[NUM_PG_HBA_FILE_RULES_ATTS];
    bool        nulls[NUM_PG_HBA_FILE_RULES_ATTS];
    char        buffer[NI_MAXHOST];
    HeapTuple   tuple;
    int         index;
    ListCell   *lc;
    const char *typestr;
    const char *addrstr;
    const char *maskstr;
    ArrayType  *options;
 
    Assert(tupdesc->natts == NUM_PG_HBA_FILE_RULES_ATTS);
 
    memset(values, 0, sizeof(values));
    memset(nulls, 0, sizeof(nulls));
    index = 0;
 
    /* line_number */
    values[index++] = Int32GetDatum(lineno);
 
    if (hba != NULL)
    {
        /* type */
        /* Avoid a default: case so compiler will warn about missing cases */
        typestr = NULL;
        switch (hba->conntype)
        {
            case ctLocal:
                typestr = "local";
                break;
            case ctHost:
                typestr = "host";
                break;
            case ctHostSSL:
                typestr = "hostssl";
                break;
            case ctHostNoSSL:
                typestr = "hostnossl";
                break;
            case ctHostGSS:
                typestr = "hostgssenc";
                break;
            case ctHostNoGSS:
                typestr = "hostnogssenc";
                break;
        }
        if (typestr)
            values[index++] = CStringGetTextDatum(typestr);
        else
            nulls[index++] = true;
 
        /* database */
        if (hba->databases)
        {
            /*
             * Flatten HbaToken list to string list.  It might seem that we
             * should re-quote any quoted tokens, but that has been rejected
             * on the grounds that it makes it harder to compare the array
             * elements to other system catalogs.  That makes entries like
             * "all" or "samerole" formally ambiguous ... but users who name
             * databases/roles that way are inflicting their own pain.
             */
            List       *names = NIL;
 
            foreach(lc, hba->databases)
            {
                HbaToken   *tok = lfirst(lc);
 
                names = lappend(names, tok->string);
            }
            values[index++] = PointerGetDatum(strlist_to_textarray(names));
        }
        else
            nulls[index++] = true;
 
        /* user */
        if (hba->roles)
        {
            /* Flatten HbaToken list to string list; see comment above */
            List       *roles = NIL;
 
            foreach(lc, hba->roles)
            {
                HbaToken   *tok = lfirst(lc);
 
                roles = lappend(roles, tok->string);
            }
            values[index++] = PointerGetDatum(strlist_to_textarray(roles));
        }
        else
            nulls[index++] = true;
 
        /* address and netmask */
        /* Avoid a default: case so compiler will warn about missing cases */
        addrstr = maskstr = NULL;
        switch (hba->ip_cmp_method)
        {
            case ipCmpMask:
                if (hba->hostname)
                {
                    addrstr = hba->hostname;
                }
                else
                {
                    /*
                     * Note: if pg_getnameinfo_all fails, it'll set buffer to
                     * "???", which we want to return.
                     */
                    if (hba->addrlen > 0)
                    {
                        if (pg_getnameinfo_all(&hba->addr, hba->addrlen,
                                               buffer, sizeof(buffer),
                                               NULL, 0,
                                               NI_NUMERICHOST) == 0)
                            clean_ipv6_addr(hba->addr.ss_family, buffer);
                        addrstr = pstrdup(buffer);
                    }
                    if (hba->masklen > 0)
                    {
                        if (pg_getnameinfo_all(&hba->mask, hba->masklen,
                                               buffer, sizeof(buffer),
                                               NULL, 0,
                                               NI_NUMERICHOST) == 0)
                            clean_ipv6_addr(hba->mask.ss_family, buffer);
                        maskstr = pstrdup(buffer);
                    }
                }
                break;
            case ipCmpAll:
                addrstr = "all";
                break;
            case ipCmpSameHost:
                addrstr = "samehost";
                break;
            case ipCmpSameNet:
                addrstr = "samenet";
                break;
        }
        if (addrstr)
            values[index++] = CStringGetTextDatum(addrstr);
        else
            nulls[index++] = true;
        if (maskstr)
            values[index++] = CStringGetTextDatum(maskstr);
        else
            nulls[index++] = true;
 
        /* auth_method */
        values[index++] = CStringGetTextDatum(hba_authname(hba->auth_method));
 
        /* options */
        options = gethba_options(hba);
        if (options)
            values[index++] = PointerGetDatum(options);
        else
            nulls[index++] = true;
    }
    else
    {
        /* no parsing result, so set relevant fields to nulls */
        memset(&nulls[1], true, (NUM_PG_HBA_FILE_RULES_ATTS - 2) * sizeof(bool));
    }
 
    /* error */
    if (err_msg)
        values[NUM_PG_HBA_FILE_RULES_ATTS - 1] = CStringGetTextDatum(err_msg);
    else
        nulls[NUM_PG_HBA_FILE_RULES_ATTS - 1] = true;
 
    tuple = heap_form_tuple(tupdesc, values, nulls);
    tuplestore_puttuple(tuple_store, tuple);
}

References HbaLine::addr, HbaLine::addrlen, Assert(), HbaLine::auth_method, clean_ipv6_addr(), HbaLine::conntype, CStringGetTextDatum, ctHost, ctHostGSS, ctHostNoGSS, ctHostNoSSL, ctHostSSL, ctLocal, HbaLine::databases, gethba_options(), hba_authname(), heap_form_tuple(), HbaLine::hostname, Int32GetDatum, HbaLine::ip_cmp_method, ipCmpAll, ipCmpMask, ipCmpSameHost, ipCmpSameNet, lappend(), lfirst, HbaLine::mask, HbaLine::masklen, TupleDescData::natts, NI_MAXHOST, NI_NUMERICHOST, NIL, NUM_PG_HBA_FILE_RULES_ATTS, options, pg_getnameinfo_all(), PointerGetDatum, pstrdup(), HbaLine::roles, HbaToken::string, strlist_to_textarray(), tuplestore_puttuple(), and values.

Referenced by fill_hba_view().

fill_hba_view()

static void fill_hba_view ( Tuplestorestate *  tuple_store, TupleDesc  tupdesc  )

static

Definition at line 2646 of file hba.c.

{
    FILE       *file;
    List       *hba_lines = NIL;
    ListCell   *line;
    MemoryContext linecxt;
    MemoryContext hbacxt;
    MemoryContext oldcxt;
 
    /*
     * In the unlikely event that we can't open pg_hba.conf, we throw an
     * error, rather than trying to report it via some sort of view entry.
     * (Most other error conditions should result in a message in a view
     * entry.)
     */
    file = AllocateFile(HbaFileName, "r");
    if (file == NULL)
        ereport(ERROR,
                (errcode_for_file_access(),
                 errmsg("could not open configuration file \"%s\": %m",
                        HbaFileName)));
 
    linecxt = tokenize_file(HbaFileName, file, &hba_lines, DEBUG3);
    FreeFile(file);
 
    /* Now parse all the lines */
    hbacxt = AllocSetContextCreate(CurrentMemoryContext,
                                   "hba parser context",
                                   ALLOCSET_SMALL_SIZES);
    oldcxt = MemoryContextSwitchTo(hbacxt);
    foreach(line, hba_lines)
    {
        TokenizedLine *tok_line = (TokenizedLine *) lfirst(line);
        HbaLine    *hbaline = NULL;
 
        /* don't parse lines that already have errors */
        if (tok_line->err_msg == NULL)
            hbaline = parse_hba_line(tok_line, DEBUG3);
 
        fill_hba_line(tuple_store, tupdesc, tok_line->line_num,
                      hbaline, tok_line->err_msg);
    }
 
    /* Free tokenizer memory */
    MemoryContextDelete(linecxt);
    /* Free parse_hba_line memory */
    MemoryContextSwitchTo(oldcxt);
    MemoryContextDelete(hbacxt);
}

References AllocateFile(), ALLOCSET_SMALL_SIZES, AllocSetContextCreate, CurrentMemoryContext, DEBUG3, ereport, TokenizedLine::err_msg, errcode_for_file_access(), errmsg(), ERROR, fill_hba_line(), FreeFile(), HbaFileName, lfirst, TokenizedLine::line_num, MemoryContextDelete(), MemoryContextSwitchTo(), NIL, parse_hba_line(), and tokenize_file().

Referenced by pg_hba_file_rules().

gethba_options()

static ArrayType * gethba_options ( HbaLine *  hba )

static

Definition at line 2342 of file hba.c.

{
    int         noptions;
    Datum       options[MAX_HBA_OPTIONS];
 
    noptions = 0;
 
    if (hba->auth_method == uaGSS || hba->auth_method == uaSSPI)
    {
        if (hba->include_realm)
            options[noptions++] =
                CStringGetTextDatum("include_realm=true");
 
        if (hba->krb_realm)
            options[noptions++] =
                CStringGetTextDatum(psprintf("krb_realm=%s", hba->krb_realm));
    }
 
    if (hba->usermap)
        options[noptions++] =
            CStringGetTextDatum(psprintf("map=%s", hba->usermap));
 
    if (hba->clientcert != clientCertOff)
        options[noptions++] =
            CStringGetTextDatum(psprintf("clientcert=%s", (hba->clientcert == clientCertCA) ? "verify-ca" : "verify-full"));
 
    if (hba->pamservice)
        options[noptions++] =
            CStringGetTextDatum(psprintf("pamservice=%s", hba->pamservice));
 
    if (hba->auth_method == uaLDAP)
    {
        if (hba->ldapserver)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapserver=%s", hba->ldapserver));
 
        if (hba->ldapport)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapport=%d", hba->ldapport));
 
        if (hba->ldaptls)
            options[noptions++] =
                CStringGetTextDatum("ldaptls=true");
 
        if (hba->ldapprefix)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapprefix=%s", hba->ldapprefix));
 
        if (hba->ldapsuffix)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapsuffix=%s", hba->ldapsuffix));
 
        if (hba->ldapbasedn)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapbasedn=%s", hba->ldapbasedn));
 
        if (hba->ldapbinddn)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapbinddn=%s", hba->ldapbinddn));
 
        if (hba->ldapbindpasswd)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapbindpasswd=%s",
                                             hba->ldapbindpasswd));
 
        if (hba->ldapsearchattribute)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapsearchattribute=%s",
                                             hba->ldapsearchattribute));
 
        if (hba->ldapsearchfilter)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapsearchfilter=%s",
                                             hba->ldapsearchfilter));
 
        if (hba->ldapscope)
            options[noptions++] =
                CStringGetTextDatum(psprintf("ldapscope=%d", hba->ldapscope));
    }
 
    if (hba->auth_method == uaRADIUS)
    {
        if (hba->radiusservers_s)
            options[noptions++] =
                CStringGetTextDatum(psprintf("radiusservers=%s", hba->radiusservers_s));
 
        if (hba->radiussecrets_s)
            options[noptions++] =
                CStringGetTextDatum(psprintf("radiussecrets=%s", hba->radiussecrets_s));
 
        if (hba->radiusidentifiers_s)
            options[noptions++] =
                CStringGetTextDatum(psprintf("radiusidentifiers=%s", hba->radiusidentifiers_s));
 
        if (hba->radiusports_s)
            options[noptions++] =
                CStringGetTextDatum(psprintf("radiusports=%s", hba->radiusports_s));
    }
 
    /* If you add more options, consider increasing MAX_HBA_OPTIONS. */
    Assert(noptions <= MAX_HBA_OPTIONS);
 
    if (noptions > 0)
        return construct_array(options, noptions, TEXTOID, -1, false, TYPALIGN_INT);
    else
        return NULL;
}

References Assert(), HbaLine::auth_method, HbaLine::clientcert, clientCertCA, clientCertOff, construct_array(), CStringGetTextDatum, HbaLine::include_realm, HbaLine::krb_realm, HbaLine::ldapbasedn, HbaLine::ldapbinddn, HbaLine::ldapbindpasswd, HbaLine::ldapport, HbaLine::ldapprefix, HbaLine::ldapscope, HbaLine::ldapsearchattribute, HbaLine::ldapsearchfilter, HbaLine::ldapserver, HbaLine::ldapsuffix, HbaLine::ldaptls, MAX_HBA_OPTIONS, noptions, HbaLine::pamservice, psprintf(), HbaLine::radiusidentifiers_s, HbaLine::radiusports_s, HbaLine::radiussecrets_s, HbaLine::radiusservers_s, uaGSS, uaLDAP, uaRADIUS, uaSSPI, and HbaLine::usermap.

Referenced by fill_hba_line().

hba_authname()

const char* hba_authname

(

UserAuth

auth_method

)

Definition at line 3153 of file hba.c.

{
    /*
     * Make sure UserAuthName[] tracks additions to the UserAuth enum
     */
    StaticAssertStmt(lengthof(UserAuthName) == USER_AUTH_LAST + 1,
                     "UserAuthName[] must match the UserAuth enum");
 
    return UserAuthName[auth_method];
}

References lengthof, StaticAssertStmt, USER_AUTH_LAST, and UserAuthName.

Referenced by fill_hba_line(), and set_authn_id().

hba_getauthmethod()

void hba_getauthmethod

(

hbaPort *

port

)

Definition at line 3140 of file hba.c.

{
    check_hba(port);
}

References check_hba(), and port.

Referenced by ClientAuthentication().

hostname_match()

static bool hostname_match ( const char *  pattern, const char *  actual_hostname  )

static

Definition at line 693 of file hba.c.

{
    if (pattern[0] == '.')      /* suffix match */
    {
        size_t      plen = strlen(pattern);
        size_t      hlen = strlen(actual_hostname);
 
        if (hlen < plen)
            return false;
 
        return (pg_strcasecmp(pattern, actual_hostname + (hlen - plen)) == 0);
    }
    else
        return (pg_strcasecmp(pattern, actual_hostname) == 0);
}

References pg_strcasecmp().

Referenced by check_hostname().

ipv4eq()

static bool ipv4eq ( struct sockaddr_in *  a, struct sockaddr_in *  b  )

static

Definition at line 669 of file hba.c.

{
    return (a->sin_addr.s_addr == b->sin_addr.s_addr);
}

References a, and b.

Referenced by check_hostname().

is_member()

static bool is_member ( Oid  userid, const char *  role  )

static

Definition at line 582 of file hba.c.

{
    Oid         roleid;
 
    if (!OidIsValid(userid))
        return false;           /* if user not exist, say "no" */
 
    roleid = get_role_oid(role, true);
 
    if (!OidIsValid(roleid))
        return false;           /* if target role not exist, say "no" */
 
    /*
     * See if user is directly or indirectly a member of role. For this
     * purpose, a superuser is not considered to be automatically a member of
     * the role, so group auth only applies to explicit membership.
     */
    return is_member_of_role_nosuper(userid, roleid);
}

References get_role_oid(), is_member_of_role_nosuper(), and OidIsValid.

Referenced by check_db(), and check_role().

load_hba()

bool load_hba

(

void

)

Definition at line 2235 of file hba.c.

{
    FILE       *file;
    List       *hba_lines = NIL;
    ListCell   *line;
    List       *new_parsed_lines = NIL;
    bool        ok = true;
    MemoryContext linecxt;
    MemoryContext oldcxt;
    MemoryContext hbacxt;
 
    file = AllocateFile(HbaFileName, "r");
    if (file == NULL)
    {
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not open configuration file \"%s\": %m",
                        HbaFileName)));
        return false;
    }
 
    linecxt = tokenize_file(HbaFileName, file, &hba_lines, LOG);
    FreeFile(file);
 
    /* Now parse all the lines */
    Assert(PostmasterContext);
    hbacxt = AllocSetContextCreate(PostmasterContext,
                                   "hba parser context",
                                   ALLOCSET_SMALL_SIZES);
    oldcxt = MemoryContextSwitchTo(hbacxt);
    foreach(line, hba_lines)
    {
        TokenizedLine *tok_line = (TokenizedLine *) lfirst(line);
        HbaLine    *newline;
 
        /* don't parse lines that already have errors */
        if (tok_line->err_msg != NULL)
        {
            ok = false;
            continue;
        }
 
        if ((newline = parse_hba_line(tok_line, LOG)) == NULL)
        {
            /* Parse error; remember there's trouble */
            ok = false;
 
            /*
             * Keep parsing the rest of the file so we can report errors on
             * more than the first line.  Error has already been logged, no
             * need for more chatter here.
             */
            continue;
        }
 
        new_parsed_lines = lappend(new_parsed_lines, newline);
    }
 
    /*
     * A valid HBA file must have at least one entry; else there's no way to
     * connect to the postmaster.  But only complain about this if we didn't
     * already have parsing errors.
     */
    if (ok && new_parsed_lines == NIL)
    {
        ereport(LOG,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("configuration file \"%s\" contains no entries",
                        HbaFileName)));
        ok = false;
    }
 
    /* Free tokenizer memory */
    MemoryContextDelete(linecxt);
    MemoryContextSwitchTo(oldcxt);
 
    if (!ok)
    {
        /* File contained one or more errors, so bail out */
        MemoryContextDelete(hbacxt);
        return false;
    }
 
    /* Loaded new file successfully, replace the one we use */
    if (parsed_hba_context != NULL)
        MemoryContextDelete(parsed_hba_context);
    parsed_hba_context = hbacxt;
    parsed_hba_lines = new_parsed_lines;
 
    return true;
}

References AllocateFile(), ALLOCSET_SMALL_SIZES, AllocSetContextCreate, Assert(), ereport, TokenizedLine::err_msg, errcode(), errcode_for_file_access(), errmsg(), FreeFile(), HbaFileName, lappend(), lfirst, LOG, MemoryContextDelete(), MemoryContextSwitchTo(), newline(), NIL, parse_hba_line(), parsed_hba_context, parsed_hba_lines, PostmasterContext, and tokenize_file().

Referenced by PerformAuthentication(), PostmasterMain(), and SIGHUP_handler().

load_ident()

bool load_ident

(

void

)

Definition at line 3029 of file hba.c.

{
    FILE       *file;
    List       *ident_lines = NIL;
    ListCell   *line_cell,
               *parsed_line_cell;
    List       *new_parsed_lines = NIL;
    bool        ok = true;
    MemoryContext linecxt;
    MemoryContext oldcxt;
    MemoryContext ident_context;
    IdentLine  *newline;
 
    file = AllocateFile(IdentFileName, "r");
    if (file == NULL)
    {
        /* not fatal ... we just won't do any special ident maps */
        ereport(LOG,
                (errcode_for_file_access(),
                 errmsg("could not open usermap file \"%s\": %m",
                        IdentFileName)));
        return false;
    }
 
    linecxt = tokenize_file(IdentFileName, file, &ident_lines, LOG);
    FreeFile(file);
 
    /* Now parse all the lines */
    Assert(PostmasterContext);
    ident_context = AllocSetContextCreate(PostmasterContext,
                                          "ident parser context",
                                          ALLOCSET_SMALL_SIZES);
    oldcxt = MemoryContextSwitchTo(ident_context);
    foreach(line_cell, ident_lines)
    {
        TokenizedLine *tok_line = (TokenizedLine *) lfirst(line_cell);
 
        /* don't parse lines that already have errors */
        if (tok_line->err_msg != NULL)
        {
            ok = false;
            continue;
        }
 
        if ((newline = parse_ident_line(tok_line)) == NULL)
        {
            /* Parse error; remember there's trouble */
            ok = false;
 
            /*
             * Keep parsing the rest of the file so we can report errors on
             * more than the first line.  Error has already been logged, no
             * need for more chatter here.
             */
            continue;
        }
 
        new_parsed_lines = lappend(new_parsed_lines, newline);
    }
 
    /* Free tokenizer memory */
    MemoryContextDelete(linecxt);
    MemoryContextSwitchTo(oldcxt);
 
    if (!ok)
    {
        /*
         * File contained one or more errors, so bail out, first being careful
         * to clean up whatever we allocated.  Most stuff will go away via
         * MemoryContextDelete, but we have to clean up regexes explicitly.
         */
        foreach(parsed_line_cell, new_parsed_lines)
        {
            newline = (IdentLine *) lfirst(parsed_line_cell);
            if (newline->ident_user[0] == '/')
                pg_regfree(&newline->re);
        }
        MemoryContextDelete(ident_context);
        return false;
    }
 
    /* Loaded new file successfully, replace the one we use */
    if (parsed_ident_lines != NIL)
    {
        foreach(parsed_line_cell, parsed_ident_lines)
        {
            newline = (IdentLine *) lfirst(parsed_line_cell);
            if (newline->ident_user[0] == '/')
                pg_regfree(&newline->re);
        }
    }
    if (parsed_ident_context != NULL)
        MemoryContextDelete(parsed_ident_context);
 
    parsed_ident_context = ident_context;
    parsed_ident_lines = new_parsed_lines;
 
    return true;
}

References AllocateFile(), ALLOCSET_SMALL_SIZES, AllocSetContextCreate, Assert(), ereport, TokenizedLine::err_msg, errcode_for_file_access(), errmsg(), FreeFile(), IdentFileName, lappend(), lfirst, LOG, MemoryContextDelete(), MemoryContextSwitchTo(), newline(), NIL, parse_ident_line(), parsed_ident_context, parsed_ident_lines, pg_regfree(), PostmasterContext, and tokenize_file().

Referenced by PerformAuthentication(), PostmasterMain(), and SIGHUP_handler().

make_hba_token()

static HbaToken* make_hba_token ( const char *  token, bool  quoted  )

static

Definition at line 294 of file hba.c.

{
    HbaToken   *hbatoken;
    int         toklen;
 
    toklen = strlen(token);
    /* we copy string into same palloc block as the struct */
    hbatoken = (HbaToken *) palloc(sizeof(HbaToken) + toklen + 1);
    hbatoken->string = (char *) hbatoken + sizeof(HbaToken);
    hbatoken->quoted = quoted;
    memcpy(hbatoken->string, token, toklen + 1);
 
    return hbatoken;
}

References palloc(), HbaToken::quoted, and HbaToken::string.

Referenced by copy_hba_token(), and next_field_expand().

next_field_expand()

static List* next_field_expand ( const char *  filename, char **  lineptr, int  elevel, char **  err_msg  )

static

Definition at line 336 of file hba.c.

{
    char        buf[MAX_TOKEN];
    bool        trailing_comma;
    bool        initial_quote;
    List       *tokens = NIL;
 
    do
    {
        if (!next_token(lineptr, buf, sizeof(buf),
                        &initial_quote, &trailing_comma,
                        elevel, err_msg))
            break;
 
        /* Is this referencing a file? */
        if (!initial_quote && buf[0] == '@' && buf[1] != '\0')
            tokens = tokenize_inc_file(tokens, filename, buf + 1,
                                       elevel, err_msg);
        else
            tokens = lappend(tokens, make_hba_token(buf, initial_quote));
    } while (trailing_comma && (*err_msg == NULL));
 
    return tokens;
}

References buf, filename, lappend(), make_hba_token(), MAX_TOKEN, next_token(), NIL, and tokenize_inc_file().

Referenced by tokenize_file().

next_token()

static bool next_token ( char **  lineptr, char *  buf, int  bufsz, bool *  initial_quote, bool *  terminating_comma, int  elevel, char **  err_msg  )

static

Definition at line 201 of file hba.c.

{
    int         c;
    char       *start_buf = buf;
    char       *end_buf = buf + (bufsz - 1);
    bool        in_quote = false;
    bool        was_quote = false;
    bool        saw_quote = false;
 
    Assert(end_buf > start_buf);
 
    *initial_quote = false;
    *terminating_comma = false;
 
    /* Move over any whitespace and commas preceding the next token */
    while ((c = (*(*lineptr)++)) != '\0' && (pg_isblank(c) || c == ','))
        ;
 
    /*
     * Build a token in buf of next characters up to EOL, unquoted comma, or
     * unquoted whitespace.
     */
    while (c != '\0' &&
           (!pg_isblank(c) || in_quote))
    {
        /* skip comments to EOL */
        if (c == '#' && !in_quote)
        {
            while ((c = (*(*lineptr)++)) != '\0')
                ;
            break;
        }
 
        if (buf >= end_buf)
        {
            *buf = '\0';
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("authentication file token too long, skipping: \"%s\"",
                            start_buf)));
            *err_msg = "authentication file token too long";
            /* Discard remainder of line */
            while ((c = (*(*lineptr)++)) != '\0')
                ;
            /* Un-eat the '\0', in case we're called again */
            (*lineptr)--;
            return false;
        }
 
        /* we do not pass back a terminating comma in the token */
        if (c == ',' && !in_quote)
        {
            *terminating_comma = true;
            break;
        }
 
        if (c != '"' || was_quote)
            *buf++ = c;
 
        /* Literal double-quote is two double-quotes */
        if (in_quote && c == '"')
            was_quote = !was_quote;
        else
            was_quote = false;
 
        if (c == '"')
        {
            in_quote = !in_quote;
            saw_quote = true;
            if (buf == start_buf)
                *initial_quote = true;
        }
 
        c = *(*lineptr)++;
    }
 
    /*
     * Un-eat the char right after the token (critical in case it is '\0',
     * else next call will read past end of string).
     */
    (*lineptr)--;
 
    *buf = '\0';
 
    return (saw_quote || buf > start_buf);
}

References Assert(), buf, ereport, errcode(), errmsg(), and pg_isblank().

Referenced by base_yylex(), filtered_base_yylex(), and next_field_expand().

parse_hba_auth_opt()

static bool parse_hba_auth_opt ( char *  name, char *  val, HbaLine *  hbaline, int  elevel, char **  err_msg  )

static

Definition at line 1701 of file hba.c.

{
    int         line_num = hbaline->linenumber;
 
#ifdef USE_LDAP
    hbaline->ldapscope = LDAP_SCOPE_SUBTREE;
#endif
 
    if (strcmp(name, "map") == 0)
    {
        if (hbaline->auth_method != uaIdent &&
            hbaline->auth_method != uaPeer &&
            hbaline->auth_method != uaGSS &&
            hbaline->auth_method != uaSSPI &&
            hbaline->auth_method != uaCert)
            INVALID_AUTH_OPTION("map", gettext_noop("ident, peer, gssapi, sspi, and cert"));
        hbaline->usermap = pstrdup(val);
    }
    else if (strcmp(name, "clientcert") == 0)
    {
        if (hbaline->conntype != ctHostSSL)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("clientcert can only be configured for \"hostssl\" rows"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "clientcert can only be configured for \"hostssl\" rows";
            return false;
        }
 
        if (strcmp(val, "verify-full") == 0)
        {
            hbaline->clientcert = clientCertFull;
        }
        else if (strcmp(val, "verify-ca") == 0)
        {
            if (hbaline->auth_method == uaCert)
            {
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("clientcert only accepts \"verify-full\" when using \"cert\" authentication"),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
                *err_msg = "clientcert can only be set to \"verify-full\" when using \"cert\" authentication";
                return false;
            }
 
            hbaline->clientcert = clientCertCA;
        }
        else
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("invalid value for clientcert: \"%s\"", val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            return false;
        }
    }
    else if (strcmp(name, "clientname") == 0)
    {
        if (hbaline->conntype != ctHostSSL)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("clientname can only be configured for \"hostssl\" rows"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "clientname can only be configured for \"hostssl\" rows";
            return false;
        }
 
        if (strcmp(val, "CN") == 0)
        {
            hbaline->clientcertname = clientCertCN;
        }
        else if (strcmp(val, "DN") == 0)
        {
            hbaline->clientcertname = clientCertDN;
        }
        else
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("invalid value for clientname: \"%s\"", val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            return false;
        }
    }
    else if (strcmp(name, "pamservice") == 0)
    {
        REQUIRE_AUTH_OPTION(uaPAM, "pamservice", "pam");
        hbaline->pamservice = pstrdup(val);
    }
    else if (strcmp(name, "pam_use_hostname") == 0)
    {
        REQUIRE_AUTH_OPTION(uaPAM, "pam_use_hostname", "pam");
        if (strcmp(val, "1") == 0)
            hbaline->pam_use_hostname = true;
        else
            hbaline->pam_use_hostname = false;
 
    }
    else if (strcmp(name, "ldapurl") == 0)
    {
#ifdef LDAP_API_FEATURE_X_OPENLDAP
        LDAPURLDesc *urldata;
        int         rc;
#endif
 
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapurl", "ldap");
#ifdef LDAP_API_FEATURE_X_OPENLDAP
        rc = ldap_url_parse(val, &urldata);
        if (rc != LDAP_SUCCESS)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("could not parse LDAP URL \"%s\": %s", val, ldap_err2string(rc))));
            *err_msg = psprintf("could not parse LDAP URL \"%s\": %s",
                                val, ldap_err2string(rc));
            return false;
        }
 
        if (strcmp(urldata->lud_scheme, "ldap") != 0 &&
            strcmp(urldata->lud_scheme, "ldaps") != 0)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("unsupported LDAP URL scheme: %s", urldata->lud_scheme)));
            *err_msg = psprintf("unsupported LDAP URL scheme: %s",
                                urldata->lud_scheme);
            ldap_free_urldesc(urldata);
            return false;
        }
 
        if (urldata->lud_scheme)
            hbaline->ldapscheme = pstrdup(urldata->lud_scheme);
        if (urldata->lud_host)
            hbaline->ldapserver = pstrdup(urldata->lud_host);
        hbaline->ldapport = urldata->lud_port;
        if (urldata->lud_dn)
            hbaline->ldapbasedn = pstrdup(urldata->lud_dn);
 
        if (urldata->lud_attrs)
            hbaline->ldapsearchattribute = pstrdup(urldata->lud_attrs[0]);  /* only use first one */
        hbaline->ldapscope = urldata->lud_scope;
        if (urldata->lud_filter)
            hbaline->ldapsearchfilter = pstrdup(urldata->lud_filter);
        ldap_free_urldesc(urldata);
#else                           /* not OpenLDAP */
        ereport(elevel,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("LDAP URLs not supported on this platform")));
        *err_msg = "LDAP URLs not supported on this platform";
#endif                          /* not OpenLDAP */
    }
    else if (strcmp(name, "ldaptls") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldaptls", "ldap");
        if (strcmp(val, "1") == 0)
            hbaline->ldaptls = true;
        else
            hbaline->ldaptls = false;
    }
    else if (strcmp(name, "ldapscheme") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapscheme", "ldap");
        if (strcmp(val, "ldap") != 0 && strcmp(val, "ldaps") != 0)
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("invalid ldapscheme value: \"%s\"", val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
        hbaline->ldapscheme = pstrdup(val);
    }
    else if (strcmp(name, "ldapserver") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapserver", "ldap");
        hbaline->ldapserver = pstrdup(val);
    }
    else if (strcmp(name, "ldapport") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapport", "ldap");
        hbaline->ldapport = atoi(val);
        if (hbaline->ldapport == 0)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("invalid LDAP port number: \"%s\"", val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = psprintf("invalid LDAP port number: \"%s\"", val);
            return false;
        }
    }
    else if (strcmp(name, "ldapbinddn") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapbinddn", "ldap");
        hbaline->ldapbinddn = pstrdup(val);
    }
    else if (strcmp(name, "ldapbindpasswd") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapbindpasswd", "ldap");
        hbaline->ldapbindpasswd = pstrdup(val);
    }
    else if (strcmp(name, "ldapsearchattribute") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapsearchattribute", "ldap");
        hbaline->ldapsearchattribute = pstrdup(val);
    }
    else if (strcmp(name, "ldapsearchfilter") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapsearchfilter", "ldap");
        hbaline->ldapsearchfilter = pstrdup(val);
    }
    else if (strcmp(name, "ldapbasedn") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapbasedn", "ldap");
        hbaline->ldapbasedn = pstrdup(val);
    }
    else if (strcmp(name, "ldapprefix") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapprefix", "ldap");
        hbaline->ldapprefix = pstrdup(val);
    }
    else if (strcmp(name, "ldapsuffix") == 0)
    {
        REQUIRE_AUTH_OPTION(uaLDAP, "ldapsuffix", "ldap");
        hbaline->ldapsuffix = pstrdup(val);
    }
    else if (strcmp(name, "krb_realm") == 0)
    {
        if (hbaline->auth_method != uaGSS &&
            hbaline->auth_method != uaSSPI)
            INVALID_AUTH_OPTION("krb_realm", gettext_noop("gssapi and sspi"));
        hbaline->krb_realm = pstrdup(val);
    }
    else if (strcmp(name, "include_realm") == 0)
    {
        if (hbaline->auth_method != uaGSS &&
            hbaline->auth_method != uaSSPI)
            INVALID_AUTH_OPTION("include_realm", gettext_noop("gssapi and sspi"));
        if (strcmp(val, "1") == 0)
            hbaline->include_realm = true;
        else
            hbaline->include_realm = false;
    }
    else if (strcmp(name, "compat_realm") == 0)
    {
        if (hbaline->auth_method != uaSSPI)
            INVALID_AUTH_OPTION("compat_realm", gettext_noop("sspi"));
        if (strcmp(val, "1") == 0)
            hbaline->compat_realm = true;
        else
            hbaline->compat_realm = false;
    }
    else if (strcmp(name, "upn_username") == 0)
    {
        if (hbaline->auth_method != uaSSPI)
            INVALID_AUTH_OPTION("upn_username", gettext_noop("sspi"));
        if (strcmp(val, "1") == 0)
            hbaline->upn_username = true;
        else
            hbaline->upn_username = false;
    }
    else if (strcmp(name, "radiusservers") == 0)
    {
        struct addrinfo *gai_result;
        struct addrinfo hints;
        int         ret;
        List       *parsed_servers;
        ListCell   *l;
        char       *dupval = pstrdup(val);
 
        REQUIRE_AUTH_OPTION(uaRADIUS, "radiusservers", "radius");
 
        if (!SplitGUCList(dupval, ',', &parsed_servers))
        {
            /* syntax error in list */
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("could not parse RADIUS server list \"%s\"",
                            val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            return false;
        }
 
        /* For each entry in the list, translate it */
        foreach(l, parsed_servers)
        {
            MemSet(&hints, 0, sizeof(hints));
            hints.ai_socktype = SOCK_DGRAM;
            hints.ai_family = AF_UNSPEC;
 
            ret = pg_getaddrinfo_all((char *) lfirst(l), NULL, &hints, &gai_result);
            if (ret || !gai_result)
            {
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("could not translate RADIUS server name \"%s\" to address: %s",
                                (char *) lfirst(l), gai_strerror(ret)),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
                if (gai_result)
                    pg_freeaddrinfo_all(hints.ai_family, gai_result);
 
                list_free(parsed_servers);
                return false;
            }
            pg_freeaddrinfo_all(hints.ai_family, gai_result);
        }
 
        /* All entries are OK, so store them */
        hbaline->radiusservers = parsed_servers;
        hbaline->radiusservers_s = pstrdup(val);
    }
    else if (strcmp(name, "radiusports") == 0)
    {
        List       *parsed_ports;
        ListCell   *l;
        char       *dupval = pstrdup(val);
 
        REQUIRE_AUTH_OPTION(uaRADIUS, "radiusports", "radius");
 
        if (!SplitGUCList(dupval, ',', &parsed_ports))
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("could not parse RADIUS port list \"%s\"",
                            val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = psprintf("invalid RADIUS port number: \"%s\"", val);
            return false;
        }
 
        foreach(l, parsed_ports)
        {
            if (atoi(lfirst(l)) == 0)
            {
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("invalid RADIUS port number: \"%s\"", val),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
 
                return false;
            }
        }
        hbaline->radiusports = parsed_ports;
        hbaline->radiusports_s = pstrdup(val);
    }
    else if (strcmp(name, "radiussecrets") == 0)
    {
        List       *parsed_secrets;
        char       *dupval = pstrdup(val);
 
        REQUIRE_AUTH_OPTION(uaRADIUS, "radiussecrets", "radius");
 
        if (!SplitGUCList(dupval, ',', &parsed_secrets))
        {
            /* syntax error in list */
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("could not parse RADIUS secret list \"%s\"",
                            val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            return false;
        }
 
        hbaline->radiussecrets = parsed_secrets;
        hbaline->radiussecrets_s = pstrdup(val);
    }
    else if (strcmp(name, "radiusidentifiers") == 0)
    {
        List       *parsed_identifiers;
        char       *dupval = pstrdup(val);
 
        REQUIRE_AUTH_OPTION(uaRADIUS, "radiusidentifiers", "radius");
 
        if (!SplitGUCList(dupval, ',', &parsed_identifiers))
        {
            /* syntax error in list */
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("could not parse RADIUS identifiers list \"%s\"",
                            val),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            return false;
        }
 
        hbaline->radiusidentifiers = parsed_identifiers;
        hbaline->radiusidentifiers_s = pstrdup(val);
    }
    else
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("unrecognized authentication option name: \"%s\"",
                        name),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = psprintf("unrecognized authentication option name: \"%s\"",
                            name);
        return false;
    }
    return true;
}

References addrinfo::ai_family, addrinfo::ai_socktype, HbaLine::auth_method, HbaLine::clientcert, clientCertCA, clientCertCN, clientCertDN, clientCertFull, HbaLine::clientcertname, HbaLine::compat_realm, HbaLine::conntype, ctHostSSL, ereport, errcode(), errcontext, errmsg(), gai_strerror, gettext_noop, HbaFileName, HbaLine::include_realm, INVALID_AUTH_OPTION, HbaLine::krb_realm, HbaLine::ldapbasedn, HbaLine::ldapbinddn, HbaLine::ldapbindpasswd, HbaLine::ldapport, HbaLine::ldapprefix, HbaLine::ldapscheme, HbaLine::ldapscope, HbaLine::ldapsearchattribute, HbaLine::ldapsearchfilter, HbaLine::ldapserver, HbaLine::ldapsuffix, HbaLine::ldaptls, lfirst, HbaLine::linenumber, list_free(), MemSet, name, HbaLine::pam_use_hostname, HbaLine::pamservice, pg_freeaddrinfo_all(), pg_getaddrinfo_all(), psprintf(), pstrdup(), HbaLine::radiusidentifiers, HbaLine::radiusidentifiers_s, HbaLine::radiusports, HbaLine::radiusports_s, HbaLine::radiussecrets, HbaLine::radiussecrets_s, HbaLine::radiusservers, HbaLine::radiusservers_s, REQUIRE_AUTH_OPTION, SplitGUCList(), uaCert, uaGSS, uaIdent, uaLDAP, uaPAM, uaRADIUS, uaSSPI, HbaLine::upn_username, HbaLine::usermap, and val.

Referenced by parse_hba_line().

parse_hba_line()

static HbaLine* parse_hba_line ( TokenizedLine *  tok_line, int  elevel  )

static

Definition at line 966 of file hba.c.

{
    int         line_num = tok_line->line_num;
    char      **err_msg = &tok_line->err_msg;
    char       *str;
    struct addrinfo *gai_result;
    struct addrinfo hints;
    int         ret;
    char       *cidr_slash;
    char       *unsupauth;
    ListCell   *field;
    List       *tokens;
    ListCell   *tokencell;
    HbaToken   *token;
    HbaLine    *parsedline;
 
    parsedline = palloc0(sizeof(HbaLine));
    parsedline->linenumber = line_num;
    parsedline->rawline = pstrdup(tok_line->raw_line);
 
    /* Check the record type. */
    Assert(tok_line->fields != NIL);
    field = list_head(tok_line->fields);
    tokens = lfirst(field);
    if (tokens->length > 1)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("multiple values specified for connection type"),
                 errhint("Specify exactly one connection type per line."),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "multiple values specified for connection type";
        return NULL;
    }
    token = linitial(tokens);
    if (strcmp(token->string, "local") == 0)
    {
#ifdef HAVE_UNIX_SOCKETS
        parsedline->conntype = ctLocal;
#else
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("local connections are not supported by this build"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "local connections are not supported by this build";
        return NULL;
#endif
    }
    else if (strcmp(token->string, "host") == 0 ||
             strcmp(token->string, "hostssl") == 0 ||
             strcmp(token->string, "hostnossl") == 0 ||
             strcmp(token->string, "hostgssenc") == 0 ||
             strcmp(token->string, "hostnogssenc") == 0)
    {
 
        if (token->string[4] == 's')    /* "hostssl" */
        {
            parsedline->conntype = ctHostSSL;
            /* Log a warning if SSL support is not active */
#ifdef USE_SSL
            if (!EnableSSL)
            {
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("hostssl record cannot match because SSL is disabled"),
                         errhint("Set ssl = on in postgresql.conf."),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
                *err_msg = "hostssl record cannot match because SSL is disabled";
            }
#else
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("hostssl record cannot match because SSL is not supported by this build"),
                     errhint("Compile with --with-ssl to use SSL connections."),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "hostssl record cannot match because SSL is not supported by this build";
#endif
        }
        else if (token->string[4] == 'g')   /* "hostgssenc" */
        {
            parsedline->conntype = ctHostGSS;
#ifndef ENABLE_GSS
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("hostgssenc record cannot match because GSSAPI is not supported by this build"),
                     errhint("Compile with --with-gssapi to use GSSAPI connections."),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "hostgssenc record cannot match because GSSAPI is not supported by this build";
#endif
        }
        else if (token->string[4] == 'n' && token->string[6] == 's')
            parsedline->conntype = ctHostNoSSL;
        else if (token->string[4] == 'n' && token->string[6] == 'g')
            parsedline->conntype = ctHostNoGSS;
        else
        {
            /* "host" */
            parsedline->conntype = ctHost;
        }
    }                           /* record type */
    else
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("invalid connection type \"%s\"",
                        token->string),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = psprintf("invalid connection type \"%s\"", token->string);
        return NULL;
    }
 
    /* Get the databases. */
    field = lnext(tok_line->fields, field);
    if (!field)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("end-of-line before database specification"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "end-of-line before database specification";
        return NULL;
    }
    parsedline->databases = NIL;
    tokens = lfirst(field);
    foreach(tokencell, tokens)
    {
        parsedline->databases = lappend(parsedline->databases,
                                        copy_hba_token(lfirst(tokencell)));
    }
 
    /* Get the roles. */
    field = lnext(tok_line->fields, field);
    if (!field)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("end-of-line before role specification"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "end-of-line before role specification";
        return NULL;
    }
    parsedline->roles = NIL;
    tokens = lfirst(field);
    foreach(tokencell, tokens)
    {
        parsedline->roles = lappend(parsedline->roles,
                                    copy_hba_token(lfirst(tokencell)));
    }
 
    if (parsedline->conntype != ctLocal)
    {
        /* Read the IP address field. (with or without CIDR netmask) */
        field = lnext(tok_line->fields, field);
        if (!field)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("end-of-line before IP address specification"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "end-of-line before IP address specification";
            return NULL;
        }
        tokens = lfirst(field);
        if (tokens->length > 1)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("multiple values specified for host address"),
                     errhint("Specify one address range per line."),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "multiple values specified for host address";
            return NULL;
        }
        token = linitial(tokens);
 
        if (token_is_keyword(token, "all"))
        {
            parsedline->ip_cmp_method = ipCmpAll;
        }
        else if (token_is_keyword(token, "samehost"))
        {
            /* Any IP on this host is allowed to connect */
            parsedline->ip_cmp_method = ipCmpSameHost;
        }
        else if (token_is_keyword(token, "samenet"))
        {
            /* Any IP on the host's subnets is allowed to connect */
            parsedline->ip_cmp_method = ipCmpSameNet;
        }
        else
        {
            /* IP and netmask are specified */
            parsedline->ip_cmp_method = ipCmpMask;
 
            /* need a modifiable copy of token */
            str = pstrdup(token->string);
 
            /* Check if it has a CIDR suffix and if so isolate it */
            cidr_slash = strchr(str, '/');
            if (cidr_slash)
                *cidr_slash = '\0';
 
            /* Get the IP address either way */
            hints.ai_flags = AI_NUMERICHOST;
            hints.ai_family = AF_UNSPEC;
            hints.ai_socktype = 0;
            hints.ai_protocol = 0;
            hints.ai_addrlen = 0;
            hints.ai_canonname = NULL;
            hints.ai_addr = NULL;
            hints.ai_next = NULL;
 
            ret = pg_getaddrinfo_all(str, NULL, &hints, &gai_result);
            if (ret == 0 && gai_result)
            {
                memcpy(&parsedline->addr, gai_result->ai_addr,
                       gai_result->ai_addrlen);
                parsedline->addrlen = gai_result->ai_addrlen;
            }
            else if (ret == EAI_NONAME)
                parsedline->hostname = str;
            else
            {
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("invalid IP address \"%s\": %s",
                                str, gai_strerror(ret)),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
                *err_msg = psprintf("invalid IP address \"%s\": %s",
                                    str, gai_strerror(ret));
                if (gai_result)
                    pg_freeaddrinfo_all(hints.ai_family, gai_result);
                return NULL;
            }
 
            pg_freeaddrinfo_all(hints.ai_family, gai_result);
 
            /* Get the netmask */
            if (cidr_slash)
            {
                if (parsedline->hostname)
                {
                    ereport(elevel,
                            (errcode(ERRCODE_CONFIG_FILE_ERROR),
                             errmsg("specifying both host name and CIDR mask is invalid: \"%s\"",
                                    token->string),
                             errcontext("line %d of configuration file \"%s\"",
                                        line_num, HbaFileName)));
                    *err_msg = psprintf("specifying both host name and CIDR mask is invalid: \"%s\"",
                                        token->string);
                    return NULL;
                }
 
                if (pg_sockaddr_cidr_mask(&parsedline->mask, cidr_slash + 1,
                                          parsedline->addr.ss_family) < 0)
                {
                    ereport(elevel,
                            (errcode(ERRCODE_CONFIG_FILE_ERROR),
                             errmsg("invalid CIDR mask in address \"%s\"",
                                    token->string),
                             errcontext("line %d of configuration file \"%s\"",
                                        line_num, HbaFileName)));
                    *err_msg = psprintf("invalid CIDR mask in address \"%s\"",
                                        token->string);
                    return NULL;
                }
                parsedline->masklen = parsedline->addrlen;
                pfree(str);
            }
            else if (!parsedline->hostname)
            {
                /* Read the mask field. */
                pfree(str);
                field = lnext(tok_line->fields, field);
                if (!field)
                {
                    ereport(elevel,
                            (errcode(ERRCODE_CONFIG_FILE_ERROR),
                             errmsg("end-of-line before netmask specification"),
                             errhint("Specify an address range in CIDR notation, or provide a separate netmask."),
                             errcontext("line %d of configuration file \"%s\"",
                                        line_num, HbaFileName)));
                    *err_msg = "end-of-line before netmask specification";
                    return NULL;
                }
                tokens = lfirst(field);
                if (tokens->length > 1)
                {
                    ereport(elevel,
                            (errcode(ERRCODE_CONFIG_FILE_ERROR),
                             errmsg("multiple values specified for netmask"),
                             errcontext("line %d of configuration file \"%s\"",
                                        line_num, HbaFileName)));
                    *err_msg = "multiple values specified for netmask";
                    return NULL;
                }
                token = linitial(tokens);
 
                ret = pg_getaddrinfo_all(token->string, NULL,
                                         &hints, &gai_result);
                if (ret || !gai_result)
                {
                    ereport(elevel,
                            (errcode(ERRCODE_CONFIG_FILE_ERROR),
                             errmsg("invalid IP mask \"%s\": %s",
                                    token->string, gai_strerror(ret)),
                             errcontext("line %d of configuration file \"%s\"",
                                        line_num, HbaFileName)));
                    *err_msg = psprintf("invalid IP mask \"%s\": %s",
                                        token->string, gai_strerror(ret));
                    if (gai_result)
                        pg_freeaddrinfo_all(hints.ai_family, gai_result);
                    return NULL;
                }
 
                memcpy(&parsedline->mask, gai_result->ai_addr,
                       gai_result->ai_addrlen);
                parsedline->masklen = gai_result->ai_addrlen;
                pg_freeaddrinfo_all(hints.ai_family, gai_result);
 
                if (parsedline->addr.ss_family != parsedline->mask.ss_family)
                {
                    ereport(elevel,
                            (errcode(ERRCODE_CONFIG_FILE_ERROR),
                             errmsg("IP address and mask do not match"),
                             errcontext("line %d of configuration file \"%s\"",
                                        line_num, HbaFileName)));
                    *err_msg = "IP address and mask do not match";
                    return NULL;
                }
            }
        }
    }                           /* != ctLocal */
 
    /* Get the authentication method */
    field = lnext(tok_line->fields, field);
    if (!field)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("end-of-line before authentication method"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "end-of-line before authentication method";
        return NULL;
    }
    tokens = lfirst(field);
    if (tokens->length > 1)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("multiple values specified for authentication type"),
                 errhint("Specify exactly one authentication type per line."),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "multiple values specified for authentication type";
        return NULL;
    }
    token = linitial(tokens);
 
    unsupauth = NULL;
    if (strcmp(token->string, "trust") == 0)
        parsedline->auth_method = uaTrust;
    else if (strcmp(token->string, "ident") == 0)
        parsedline->auth_method = uaIdent;
    else if (strcmp(token->string, "peer") == 0)
        parsedline->auth_method = uaPeer;
    else if (strcmp(token->string, "password") == 0)
        parsedline->auth_method = uaPassword;
    else if (strcmp(token->string, "gss") == 0)
#ifdef ENABLE_GSS
        parsedline->auth_method = uaGSS;
#else
        unsupauth = "gss";
#endif
    else if (strcmp(token->string, "sspi") == 0)
#ifdef ENABLE_SSPI
        parsedline->auth_method = uaSSPI;
#else
        unsupauth = "sspi";
#endif
    else if (strcmp(token->string, "reject") == 0)
        parsedline->auth_method = uaReject;
    else if (strcmp(token->string, "md5") == 0)
    {
        if (Db_user_namespace)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("MD5 authentication is not supported when \"db_user_namespace\" is enabled"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "MD5 authentication is not supported when \"db_user_namespace\" is enabled";
            return NULL;
        }
        parsedline->auth_method = uaMD5;
    }
    else if (strcmp(token->string, "scram-sha-256") == 0)
        parsedline->auth_method = uaSCRAM;
    else if (strcmp(token->string, "pam") == 0)
#ifdef USE_PAM
        parsedline->auth_method = uaPAM;
#else
        unsupauth = "pam";
#endif
    else if (strcmp(token->string, "bsd") == 0)
#ifdef USE_BSD_AUTH
        parsedline->auth_method = uaBSD;
#else
        unsupauth = "bsd";
#endif
    else if (strcmp(token->string, "ldap") == 0)
#ifdef USE_LDAP
        parsedline->auth_method = uaLDAP;
#else
        unsupauth = "ldap";
#endif
    else if (strcmp(token->string, "cert") == 0)
#ifdef USE_SSL
        parsedline->auth_method = uaCert;
#else
        unsupauth = "cert";
#endif
    else if (strcmp(token->string, "radius") == 0)
        parsedline->auth_method = uaRADIUS;
    else
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("invalid authentication method \"%s\"",
                        token->string),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = psprintf("invalid authentication method \"%s\"",
                            token->string);
        return NULL;
    }
 
    if (unsupauth)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("invalid authentication method \"%s\": not supported by this build",
                        token->string),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = psprintf("invalid authentication method \"%s\": not supported by this build",
                            token->string);
        return NULL;
    }
 
    /*
     * XXX: When using ident on local connections, change it to peer, for
     * backwards compatibility.
     */
    if (parsedline->conntype == ctLocal &&
        parsedline->auth_method == uaIdent)
        parsedline->auth_method = uaPeer;
 
    /* Invalid authentication combinations */
    if (parsedline->conntype == ctLocal &&
        parsedline->auth_method == uaGSS)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("gssapi authentication is not supported on local sockets"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "gssapi authentication is not supported on local sockets";
        return NULL;
    }
 
    if (parsedline->conntype != ctLocal &&
        parsedline->auth_method == uaPeer)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("peer authentication is only supported on local sockets"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "peer authentication is only supported on local sockets";
        return NULL;
    }
 
    /*
     * SSPI authentication can never be enabled on ctLocal connections,
     * because it's only supported on Windows, where ctLocal isn't supported.
     */
 
 
    if (parsedline->conntype != ctHostSSL &&
        parsedline->auth_method == uaCert)
    {
        ereport(elevel,
                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                 errmsg("cert authentication is only supported on hostssl connections"),
                 errcontext("line %d of configuration file \"%s\"",
                            line_num, HbaFileName)));
        *err_msg = "cert authentication is only supported on hostssl connections";
        return NULL;
    }
 
    /*
     * For GSS and SSPI, set the default value of include_realm to true.
     * Having include_realm set to false is dangerous in multi-realm
     * situations and is generally considered bad practice.  We keep the
     * capability around for backwards compatibility, but we might want to
     * remove it at some point in the future.  Users who still need to strip
     * the realm off would be better served by using an appropriate regex in a
     * pg_ident.conf mapping.
     */
    if (parsedline->auth_method == uaGSS ||
        parsedline->auth_method == uaSSPI)
        parsedline->include_realm = true;
 
    /*
     * For SSPI, include_realm defaults to the SAM-compatible domain (aka
     * NetBIOS name) and user names instead of the Kerberos principal name for
     * compatibility.
     */
    if (parsedline->auth_method == uaSSPI)
    {
        parsedline->compat_realm = true;
        parsedline->upn_username = false;
    }
 
    /* Parse remaining arguments */
    while ((field = lnext(tok_line->fields, field)) != NULL)
    {
        tokens = lfirst(field);
        foreach(tokencell, tokens)
        {
            char       *val;
 
            token = lfirst(tokencell);
 
            str = pstrdup(token->string);
            val = strchr(str, '=');
            if (val == NULL)
            {
                /*
                 * Got something that's not a name=value pair.
                 */
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("authentication option not in name=value format: %s", token->string),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
                *err_msg = psprintf("authentication option not in name=value format: %s",
                                    token->string);
                return NULL;
            }
 
            *val++ = '\0';      /* str now holds "name", val holds "value" */
            if (!parse_hba_auth_opt(str, val, parsedline, elevel, err_msg))
                /* parse_hba_auth_opt already logged the error message */
                return NULL;
            pfree(str);
        }
    }
 
    /*
     * Check if the selected authentication method has any mandatory arguments
     * that are not set.
     */
    if (parsedline->auth_method == uaLDAP)
    {
#ifndef HAVE_LDAP_INITIALIZE
        /* Not mandatory for OpenLDAP, because it can use DNS SRV records */
        MANDATORY_AUTH_ARG(parsedline->ldapserver, "ldapserver", "ldap");
#endif
 
        /*
         * LDAP can operate in two modes: either with a direct bind, using
         * ldapprefix and ldapsuffix, or using a search+bind, using
         * ldapbasedn, ldapbinddn, ldapbindpasswd and one of
         * ldapsearchattribute or ldapsearchfilter.  Disallow mixing these
         * parameters.
         */
        if (parsedline->ldapprefix || parsedline->ldapsuffix)
        {
            if (parsedline->ldapbasedn ||
                parsedline->ldapbinddn ||
                parsedline->ldapbindpasswd ||
                parsedline->ldapsearchattribute ||
                parsedline->ldapsearchfilter)
            {
                ereport(elevel,
                        (errcode(ERRCODE_CONFIG_FILE_ERROR),
                         errmsg("cannot use ldapbasedn, ldapbinddn, ldapbindpasswd, ldapsearchattribute, ldapsearchfilter, or ldapurl together with ldapprefix"),
                         errcontext("line %d of configuration file \"%s\"",
                                    line_num, HbaFileName)));
                *err_msg = "cannot use ldapbasedn, ldapbinddn, ldapbindpasswd, ldapsearchattribute, ldapsearchfilter, or ldapurl together with ldapprefix";
                return NULL;
            }
        }
        else if (!parsedline->ldapbasedn)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("authentication method \"ldap\" requires argument \"ldapbasedn\", \"ldapprefix\", or \"ldapsuffix\" to be set"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "authentication method \"ldap\" requires argument \"ldapbasedn\", \"ldapprefix\", or \"ldapsuffix\" to be set";
            return NULL;
        }
 
        /*
         * When using search+bind, you can either use a simple attribute
         * (defaulting to "uid") or a fully custom search filter.  You can't
         * do both.
         */
        if (parsedline->ldapsearchattribute && parsedline->ldapsearchfilter)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("cannot use ldapsearchattribute together with ldapsearchfilter"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "cannot use ldapsearchattribute together with ldapsearchfilter";
            return NULL;
        }
    }
 
    if (parsedline->auth_method == uaRADIUS)
    {
        MANDATORY_AUTH_ARG(parsedline->radiusservers, "radiusservers", "radius");
        MANDATORY_AUTH_ARG(parsedline->radiussecrets, "radiussecrets", "radius");
 
        if (list_length(parsedline->radiusservers) < 1)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("list of RADIUS servers cannot be empty"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "list of RADIUS servers cannot be empty";
            return NULL;
        }
 
        if (list_length(parsedline->radiussecrets) < 1)
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("list of RADIUS secrets cannot be empty"),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = "list of RADIUS secrets cannot be empty";
            return NULL;
        }
 
        /*
         * Verify length of option lists - each can be 0 (except for secrets,
         * but that's already checked above), 1 (use the same value
         * everywhere) or the same as the number of servers.
         */
        if (!(list_length(parsedline->radiussecrets) == 1 ||
              list_length(parsedline->radiussecrets) == list_length(parsedline->radiusservers)))
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("the number of RADIUS secrets (%d) must be 1 or the same as the number of RADIUS servers (%d)",
                            list_length(parsedline->radiussecrets),
                            list_length(parsedline->radiusservers)),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = psprintf("the number of RADIUS secrets (%d) must be 1 or the same as the number of RADIUS servers (%d)",
                                list_length(parsedline->radiussecrets),
                                list_length(parsedline->radiusservers));
            return NULL;
        }
        if (!(list_length(parsedline->radiusports) == 0 ||
              list_length(parsedline->radiusports) == 1 ||
              list_length(parsedline->radiusports) == list_length(parsedline->radiusservers)))
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("the number of RADIUS ports (%d) must be 1 or the same as the number of RADIUS servers (%d)",
                            list_length(parsedline->radiusports),
                            list_length(parsedline->radiusservers)),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = psprintf("the number of RADIUS ports (%d) must be 1 or the same as the number of RADIUS servers (%d)",
                                list_length(parsedline->radiusports),
                                list_length(parsedline->radiusservers));
            return NULL;
        }
        if (!(list_length(parsedline->radiusidentifiers) == 0 ||
              list_length(parsedline->radiusidentifiers) == 1 ||
              list_length(parsedline->radiusidentifiers) == list_length(parsedline->radiusservers)))
        {
            ereport(elevel,
                    (errcode(ERRCODE_CONFIG_FILE_ERROR),
                     errmsg("the number of RADIUS identifiers (%d) must be 1 or the same as the number of RADIUS servers (%d)",
                            list_length(parsedline->radiusidentifiers),
                            list_length(parsedline->radiusservers)),
                     errcontext("line %d of configuration file \"%s\"",
                                line_num, HbaFileName)));
            *err_msg = psprintf("the number of RADIUS identifiers (%d) must be 1 or the same as the number of RADIUS servers (%d)",
                                list_length(parsedline->radiusidentifiers),
                                list_length(parsedline->radiusservers));
            return NULL;
        }
    }
 
    /*
     * Enforce any parameters implied by other settings.
     */
    if (parsedline->auth_method == uaCert)
    {
        parsedline->clientcert = clientCertCA;
    }
 
    return parsedline;
}

References HbaLine::addr, HbaLine::addrlen, addrinfo::ai_addr, addrinfo::ai_addrlen, addrinfo::ai_canonname, addrinfo::ai_family, addrinfo::ai_flags, addrinfo::ai_next, AI_NUMERICHOST, addrinfo::ai_protocol, addrinfo::ai_socktype, Assert(), HbaLine::auth_method, HbaLine::clientcert, clientCertCA, HbaLine::compat_realm, HbaLine::conntype, copy_hba_token(), ctHost, ctHostGSS, ctHostNoGSS, ctHostNoSSL, ctHostSSL, ctLocal, HbaLine::databases, Db_user_namespace, EAI_NONAME, EnableSSL, ereport, TokenizedLine::err_msg, errcode(), errcontext, errhint(), errmsg(), TokenizedLine::fields, gai_strerror, HbaFileName, HbaLine::hostname, HbaLine::include_realm, HbaLine::ip_cmp_method, ipCmpAll, ipCmpMask, ipCmpSameHost, ipCmpSameNet, lappend(), HbaLine::ldapbasedn, HbaLine::ldapbinddn, HbaLine::ldapbindpasswd, HbaLine::ldapprefix, HbaLine::ldapsearchattribute, HbaLine::ldapsearchfilter, HbaLine::ldapserver, HbaLine::ldapsuffix, List::length, lfirst, TokenizedLine::line_num, HbaLine::linenumber, linitial, list_head(), list_length(), lnext(), MANDATORY_AUTH_ARG, HbaLine::mask, HbaLine::masklen, NIL, palloc0(), parse_hba_auth_opt(), pfree(), pg_freeaddrinfo_all(), pg_getaddrinfo_all(), pg_sockaddr_cidr_mask(), psprintf(), pstrdup(), HbaLine::radiusidentifiers, HbaLine::radiusports, HbaLine::radiussecrets, HbaLine::radiusservers, TokenizedLine::raw_line, HbaLine::rawline, HbaLine::roles, generate_unaccent_rules::str, HbaToken::string, token_is_keyword, uaBSD, uaCert, uaGSS, uaIdent, uaLDAP, uaMD5, uaPAM, uaPassword, uaRADIUS, uaReject, uaSCRAM, uaSSPI, uaTrust, HbaLine::upn_username, and val.

Referenced by fill_hba_view(), and load_hba().

parse_ident_line()

static IdentLine* parse_ident_line ( TokenizedLine *  tok_line )

static

Definition at line 2762 of file hba.c.

{
    int         line_num = tok_line->line_num;
    ListCell   *field;
    List       *tokens;
    HbaToken   *token;
    IdentLine  *parsedline;
 
    Assert(tok_line->fields != NIL);
    field = list_head(tok_line->fields);
 
    parsedline = palloc0(sizeof(IdentLine));
    parsedline->linenumber = line_num;
 
    /* Get the map token (must exist) */
    tokens = lfirst(field);
    IDENT_MULTI_VALUE(tokens);
    token = linitial(tokens);
    parsedline->usermap = pstrdup(token->string);
 
    /* Get the ident user token */
    field = lnext(tok_line->fields, field);
    IDENT_FIELD_ABSENT(field);
    tokens = lfirst(field);
    IDENT_MULTI_VALUE(tokens);
    token = linitial(tokens);
    parsedline->ident_user = pstrdup(token->string);
 
    /* Get the PG rolename token */
    field = lnext(tok_line->fields, field);
    IDENT_FIELD_ABSENT(field);
    tokens = lfirst(field);
    IDENT_MULTI_VALUE(tokens);
    token = linitial(tokens);
    parsedline->pg_role = pstrdup(token->string);
 
    if (parsedline->ident_user[0] == '/')
    {
        /*
         * When system username starts with a slash, treat it as a regular
         * expression. Pre-compile it.
         */
        int         r;
        pg_wchar   *wstr;
        int         wlen;
 
        wstr = palloc((strlen(parsedline->ident_user + 1) + 1) * sizeof(pg_wchar));
        wlen = pg_mb2wchar_with_len(parsedline->ident_user + 1,
                                    wstr, strlen(parsedline->ident_user + 1));
 
        r = pg_regcomp(&parsedline->re, wstr, wlen, REG_ADVANCED, C_COLLATION_OID);
        if (r)
        {
            char        errstr[100];
 
            pg_regerror(r, &parsedline->re, errstr, sizeof(errstr));
            ereport(LOG,
                    (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION),
                     errmsg("invalid regular expression \"%s\": %s",
                            parsedline->ident_user + 1, errstr)));
 
            pfree(wstr);
            return NULL;
        }
        pfree(wstr);
    }
 
    return parsedline;
}

References Assert(), ereport, errcode(), errmsg(), TokenizedLine::fields, IDENT_FIELD_ABSENT, IDENT_MULTI_VALUE, IdentLine::ident_user, lfirst, TokenizedLine::line_num, IdentLine::linenumber, linitial, list_head(), lnext(), LOG, NIL, palloc(), palloc0(), pfree(), pg_mb2wchar_with_len(), pg_regcomp(), pg_regerror(), IdentLine::pg_role, pstrdup(), IdentLine::re, REG_ADVANCED, HbaToken::string, and IdentLine::usermap.

Referenced by load_ident().

pg_hba_file_rules()

Datum pg_hba_file_rules

(

PG_FUNCTION_ARGS

)

Definition at line 2700 of file hba.c.

{
    Tuplestorestate *tuple_store;
    TupleDesc   tupdesc;
    MemoryContext old_cxt;
    ReturnSetInfo *rsi;
 
    /*
     * We must use the Materialize mode to be safe against HBA file changes
     * while the cursor is open. It's also more efficient than having to look
     * up our current position in the parsed list every time.
     */
    rsi = (ReturnSetInfo *) fcinfo->resultinfo;
 
    /* Check to see if caller supports us returning a tuplestore */
    if (rsi == NULL || !IsA(rsi, ReturnSetInfo))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("set-valued function called in context that cannot accept a set")));
    if (!(rsi->allowedModes & SFRM_Materialize))
        ereport(ERROR,
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                 errmsg("materialize mode required, but it is not allowed in this context")));
 
    rsi->returnMode = SFRM_Materialize;
 
    /* Build a tuple descriptor for our result type */
    if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
        elog(ERROR, "return type must be a row type");
 
    /* Build tuplestore to hold the result rows */
    old_cxt = MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
 
    tuple_store =
        tuplestore_begin_heap(rsi->allowedModes & SFRM_Materialize_Random,
                              false, work_mem);
    rsi->setDesc = tupdesc;
    rsi->setResult = tuple_store;
 
    MemoryContextSwitchTo(old_cxt);
 
    /* Fill the tuplestore */
    fill_hba_view(tuple_store, tupdesc);
 
    PG_RETURN_NULL();
}

References ReturnSetInfo::allowedModes, ReturnSetInfo::econtext, ExprContext::ecxt_per_query_memory, elog, ereport, errcode(), errmsg(), ERROR, fill_hba_view(), get_call_result_type(), if(), IsA, MemoryContextSwitchTo(), PG_RETURN_NULL, ReturnSetInfo::returnMode, ReturnSetInfo::setDesc, ReturnSetInfo::setResult, SFRM_Materialize, SFRM_Materialize_Random, tuplestore_begin_heap(), TYPEFUNC_COMPOSITE, and work_mem.

pg_isblank()

bool pg_isblank

(

const char

c

)

Definition at line 158 of file hba.c.

{
    return c == ' ' || c == '\t' || c == '\r';
}

Referenced by interpret_ident_response(), and next_token().

tokenize_file()

static MemoryContext tokenize_file ( const char *  filename, FILE *  file, List **  tok_lines, int  elevel  )

static

Definition at line 476 of file hba.c.

{
    int         line_number = 1;
    StringInfoData buf;
    MemoryContext linecxt;
    MemoryContext oldcxt;
 
    linecxt = AllocSetContextCreate(CurrentMemoryContext,
                                    "tokenize_file",
                                    ALLOCSET_SMALL_SIZES);
    oldcxt = MemoryContextSwitchTo(linecxt);
 
    initStringInfo(&buf);
 
    *tok_lines = NIL;
 
    while (!feof(file) && !ferror(file))
    {
        char       *lineptr;
        List       *current_line = NIL;
        char       *err_msg = NULL;
        int         last_backslash_buflen = 0;
        int         continuations = 0;
 
        /* Collect the next input line, handling backslash continuations */
        resetStringInfo(&buf);
 
        while (pg_get_line_append(file, &buf, NULL))
        {
            /* Strip trailing newline, including \r in case we're on Windows */
            buf.len = pg_strip_crlf(buf.data);
 
            /*
             * Check for backslash continuation.  The backslash must be after
             * the last place we found a continuation, else two backslashes
             * followed by two \n's would behave surprisingly.
             */
            if (buf.len > last_backslash_buflen &&
                buf.data[buf.len - 1] == '\\')
            {
                /* Continuation, so strip it and keep reading */
                buf.data[--buf.len] = '\0';
                last_backslash_buflen = buf.len;
                continuations++;
                continue;
            }
 
            /* Nope, so we have the whole line */
            break;
        }
 
        if (ferror(file))
        {
            /* I/O error! */
            int         save_errno = errno;
 
            ereport(elevel,
                    (errcode_for_file_access(),
                     errmsg("could not read file \"%s\": %m", filename)));
            err_msg = psprintf("could not read file \"%s\": %s",
                               filename, strerror(save_errno));
            break;
        }
 
        /* Parse fields */
        lineptr = buf.data;
        while (*lineptr && err_msg == NULL)
        {
            List       *current_field;
 
            current_field = next_field_expand(filename, &lineptr,
                                              elevel, &err_msg);
            /* add field to line, unless we are at EOL or comment start */
            if (current_field != NIL)
                current_line = lappend(current_line, current_field);
        }
 
        /* Reached EOL; emit line to TokenizedLine list unless it's boring */
        if (current_line != NIL || err_msg != NULL)
        {
            TokenizedLine *tok_line;
 
            tok_line = (TokenizedLine *) palloc(sizeof(TokenizedLine));
            tok_line->fields = current_line;
            tok_line->line_num = line_number;
            tok_line->raw_line = pstrdup(buf.data);
            tok_line->err_msg = err_msg;
            *tok_lines = lappend(*tok_lines, tok_line);
        }
 
        line_number += continuations + 1;
    }
 
    MemoryContextSwitchTo(oldcxt);
 
    return linecxt;
}

References ALLOCSET_SMALL_SIZES, AllocSetContextCreate, buf, CurrentMemoryContext, ereport, TokenizedLine::err_msg, errcode_for_file_access(), errmsg(), TokenizedLine::fields, filename, initStringInfo(), lappend(), TokenizedLine::line_num, MemoryContextSwitchTo(), next_field_expand(), NIL, palloc(), pg_get_line_append(), pg_strip_crlf(), psprintf(), pstrdup(), TokenizedLine::raw_line, resetStringInfo(), and strerror.

Referenced by fill_hba_view(), load_hba(), load_ident(), and tokenize_inc_file().

tokenize_inc_file()

static List * tokenize_inc_file ( List *  tokens, const char *  outer_filename, const char *  inc_filename, int  elevel, char **  err_msg  )

static

Definition at line 378 of file hba.c.

{
    char       *inc_fullname;
    FILE       *inc_file;
    List       *inc_lines;
    ListCell   *inc_line;
    MemoryContext linecxt;
 
    if (is_absolute_path(inc_filename))
    {
        /* absolute path is taken as-is */
        inc_fullname = pstrdup(inc_filename);
    }
    else
    {
        /* relative path is relative to dir of calling file */
        inc_fullname = (char *) palloc(strlen(outer_filename) + 1 +
                                       strlen(inc_filename) + 1);
        strcpy(inc_fullname, outer_filename);
        get_parent_directory(inc_fullname);
        join_path_components(inc_fullname, inc_fullname, inc_filename);
        canonicalize_path(inc_fullname);
    }
 
    inc_file = AllocateFile(inc_fullname, "r");
    if (inc_file == NULL)
    {
        int         save_errno = errno;
 
        ereport(elevel,
                (errcode_for_file_access(),
                 errmsg("could not open secondary authentication file \"@%s\" as \"%s\": %m",
                        inc_filename, inc_fullname)));
        *err_msg = psprintf("could not open secondary authentication file \"@%s\" as \"%s\": %s",
                            inc_filename, inc_fullname, strerror(save_errno));
        pfree(inc_fullname);
        return tokens;
    }
 
    /* There is possible recursion here if the file contains @ */
    linecxt = tokenize_file(inc_fullname, inc_file, &inc_lines, elevel);
 
    FreeFile(inc_file);
    pfree(inc_fullname);
 
    /* Copy all tokens found in the file and append to the tokens list */
    foreach(inc_line, inc_lines)
    {
        TokenizedLine *tok_line = (TokenizedLine *) lfirst(inc_line);
        ListCell   *inc_field;
 
        /* If any line has an error, propagate that up to caller */
        if (tok_line->err_msg)
        {
            *err_msg = pstrdup(tok_line->err_msg);
            break;
        }
 
        foreach(inc_field, tok_line->fields)
        {
            List       *inc_tokens = lfirst(inc_field);
            ListCell   *inc_token;
 
            foreach(inc_token, inc_tokens)
            {
                HbaToken   *token = lfirst(inc_token);
 
                tokens = lappend(tokens, copy_hba_token(token));
            }
        }
    }
 
    MemoryContextDelete(linecxt);
    return tokens;
}

References AllocateFile(), canonicalize_path(), copy_hba_token(), ereport, TokenizedLine::err_msg, errcode_for_file_access(), errmsg(), TokenizedLine::fields, FreeFile(), get_parent_directory(), is_absolute_path, join_path_components(), lappend(), lfirst, MemoryContextDelete(), palloc(), pfree(), psprintf(), pstrdup(), strerror, and tokenize_file().

Referenced by next_field_expand().

Variable Documentation

parsed_hba_context

MemoryContext parsed_hba_context = NULL

static

Definition at line 102 of file hba.c.

Referenced by load_hba().

parsed_hba_lines

List* parsed_hba_lines = NIL

static

Definition at line 101 of file hba.c.

Referenced by check_hba(), and load_hba().

parsed_ident_context

MemoryContext parsed_ident_context = NULL

static

Definition at line 113 of file hba.c.

Referenced by load_ident().

parsed_ident_lines

List* parsed_ident_lines = NIL

static

Definition at line 112 of file hba.c.

Referenced by check_usermap(), and load_ident().

UserAuthName

const char* const UserAuthName[]

static

Initial value:

=
{
    "reject",
    "implicit reject",          
    "trust",
    "ident",
    "password",
    "md5",
    "scram-sha-256",
    "gss",
    "sspi",
    "pam",
    "bsd",
    "ldap",
    "cert",
    "radius",
    "peer"
}

Definition at line 121 of file hba.c.

Referenced by hba_authname().