px-crypt.c File Reference

#include "postgres.h"
#include "px-crypt.h"
#include "px.h"

Include dependency graph for px-crypt.c:

Go to the source code of this file.

Data Structures
struct	px_crypt_algo
struct	generator

Functions
static char *	run_crypt_des (const char *psw, const char *salt, char *buf, unsigned len)
static char *	run_crypt_md5 (const char *psw, const char *salt, char *buf, unsigned len)
static char *	run_crypt_bf (const char *psw, const char *salt, char *buf, unsigned len)
static char *	run_crypt_sha (const char *psw, const char *salt, char *buf, unsigned len)
char *	px_crypt (const char *psw, const char *salt, char *buf, unsigned len)
int	px_gen_salt (const char *salt_type, char *buf, int rounds)

Variables
static const struct px_crypt_algo	px_crypt_list []
static struct generator	gen_list []

Function Documentation

px_crypt()

char * px_crypt	(	const char *	psw,
		const char *	salt,
		char *	buf,
		unsigned	len
	)

Definition at line 102 of file px-crypt.c.

{
    const struct px_crypt_algo *c;
 
    CheckBuiltinCryptoMode();
 
    for (c = px_crypt_list; c->id; c++)
    {
        if (!c->id_len)
            break;
        if (strncmp(salt, c->id, c->id_len) == 0)
            break;
    }
 
    if (c->crypt == NULL)
        return NULL;
 
    return c->crypt(psw, salt, buf, len);
}

References buf, CheckBuiltinCryptoMode(), px_crypt_algo::id, len, and px_crypt_list.

Referenced by pg_crypt().

px_gen_salt()

int px_gen_salt	(	const char *	salt_type,
		char *	buf,
		int	rounds
	)

Definition at line 156 of file px-crypt.c.

{
    struct generator *g;
    char       *p;
    char        rbuf[16];
 
    CheckBuiltinCryptoMode();
 
    for (g = gen_list; g->name; g++)
        if (pg_strcasecmp(g->name, salt_type) == 0)
            break;
 
    if (g->name == NULL)
        return PXE_UNKNOWN_SALT_ALGO;
 
    if (g->def_rounds)
    {
        if (rounds == 0)
            rounds = g->def_rounds;
 
        if (rounds < g->min_rounds || rounds > g->max_rounds)
            return PXE_BAD_SALT_ROUNDS;
    }
 
    if (!pg_strong_random(rbuf, g->input_len))
        return PXE_NO_RANDOM;
 
    p = g->gen(rounds, rbuf, g->input_len, buf, PX_MAX_SALT_LEN);
    px_memset(rbuf, 0, sizeof(rbuf));
 
    if (p == NULL)
        return PXE_BAD_SALT_ROUNDS;
 
    return strlen(p);
}

References buf, CheckBuiltinCryptoMode(), generator::def_rounds, generator::gen, gen_list, generator::input_len, generator::max_rounds, generator::min_rounds, generator::name, pg_strcasecmp(), pg_strong_random(), PX_MAX_SALT_LEN, px_memset(), PXE_BAD_SALT_ROUNDS, PXE_NO_RANDOM, and PXE_UNKNOWN_SALT_ALGO.

Referenced by pg_gen_salt(), and pg_gen_salt_rounds().

run_crypt_bf()

static char * run_crypt_bf ( const char *  psw, const char *  salt, char *  buf, unsigned  len  )

static

Definition at line 61 of file px-crypt.c.

{
    char       *res;
 
    res = _crypt_blowfish_rn(psw, salt, buf, len);
    return res;
}

References _crypt_blowfish_rn(), buf, and len.

run_crypt_des()

static char * run_crypt_des ( const char *  psw, const char *  salt, char *  buf, unsigned  len  )

static

Definition at line 38 of file px-crypt.c.

{
    char       *res;
 
    res = px_crypt_des(psw, salt);
    if (res == NULL || strlen(res) > len - 1)
        return NULL;
    strcpy(buf, res);
    return buf;
}

References buf, len, and px_crypt_des().

run_crypt_md5()

static char * run_crypt_md5 ( const char *  psw, const char *  salt, char *  buf, unsigned  len  )

static

Definition at line 51 of file px-crypt.c.

{
    char       *res;
 
    res = px_crypt_md5(psw, salt, buf, len);
    return res;
}

References buf, len, and px_crypt_md5().

run_crypt_sha()

static char * run_crypt_sha ( const char *  psw, const char *  salt, char *  buf, unsigned  len  )

static

Definition at line 71 of file px-crypt.c.

{
    char       *res;
 
    res = px_crypt_shacrypt(psw, salt, buf, len);
    return res;
}

References buf, len, and px_crypt_shacrypt().

Variable Documentation

gen_list

struct generator gen_list[]

static

Initial value:

= {
    {"des", _crypt_gensalt_traditional_rn, 2, 0, 0, 0},
    {"md5", _crypt_gensalt_md5_rn, 6, 0, 0, 0},
    {"xdes", _crypt_gensalt_extended_rn, 3, PX_XDES_ROUNDS, 1, 0xFFFFFF},
    {"bf", _crypt_gensalt_blowfish_rn, 16, PX_BF_ROUNDS, 4, 31},
    {
        "sha256crypt", _crypt_gensalt_sha256_rn,
        PX_SHACRYPT_SALT_MAX_LEN, PX_SHACRYPT_ROUNDS_DEFAULT,
        PX_SHACRYPT_ROUNDS_MIN, PX_SHACRYPT_ROUNDS_MAX
    },
    {
        "sha512crypt", _crypt_gensalt_sha512_rn,
        PX_SHACRYPT_SALT_MAX_LEN, PX_SHACRYPT_ROUNDS_DEFAULT,
        PX_SHACRYPT_ROUNDS_MIN, PX_SHACRYPT_ROUNDS_MAX
    },
    {NULL, NULL, 0, 0, 0, 0}
}

Definition at line 137 of file px-crypt.c.

Referenced by px_gen_salt().

px_crypt_list

const struct px_crypt_algo px_crypt_list[]

static

Initial value:

= {
    {"$2a$", 4, run_crypt_bf},
    {"$2x$", 4, run_crypt_bf},
    {"$2$", 3, NULL},           
    {"$1$", 3, run_crypt_md5},
    {"$5$", 3, run_crypt_sha},
    {"$6$", 3, run_crypt_sha},
    {"_", 1, run_crypt_des},
    {"", 0, run_crypt_des},
    {NULL, 0, NULL}
}

Definition at line 89 of file px-crypt.c.

Referenced by px_crypt().