openssl.c File Reference

#include "postgres.h"
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include "px.h"
#include "utils/memutils.h"
#include "utils/resowner.h"

Include dependency graph for openssl.c:

Go to the source code of this file.

Data Structures
struct	OSSLDigest
struct	ossl_cipher
struct	OSSLCipher
struct	ossl_cipher_lookup

Macros
#define	MAX_KEY   (512/8)
#define	MAX_IV   (128/8)

Typedefs
typedef struct OSSLDigest	OSSLDigest
typedef const EVP_CIPHER *(*	ossl_EVP_cipher_func) (void)
typedef struct OSSLCipher	OSSLCipher

Functions
static void	free_openssl_digest (OSSLDigest *digest)
static void	digest_free_callback (ResourceReleasePhase phase, bool isCommit, bool isTopLevel, void *arg)
static unsigned	digest_result_size (PX_MD *h)
static unsigned	digest_block_size (PX_MD *h)
static void	digest_reset (PX_MD *h)
static void	digest_update (PX_MD *h, const uint8 *data, unsigned dlen)
static void	digest_finish (PX_MD *h, uint8 *dst)
static void	digest_free (PX_MD *h)
int	px_find_digest (const char *name, PX_MD **res)
static void	free_openssl_cipher (OSSLCipher *od)
static void	cipher_free_callback (ResourceReleasePhase phase, bool isCommit, bool isTopLevel, void *arg)
static unsigned	gen_ossl_block_size (PX_Cipher *c)
static unsigned	gen_ossl_key_size (PX_Cipher *c)
static unsigned	gen_ossl_iv_size (PX_Cipher *c)
static void	gen_ossl_free (PX_Cipher *c)
static int	gen_ossl_decrypt (PX_Cipher *c, int padding, const uint8 *data, unsigned dlen, uint8 *res, unsigned *rlen)
static int	gen_ossl_encrypt (PX_Cipher *c, int padding, const uint8 *data, unsigned dlen, uint8 *res, unsigned *rlen)
static int	bf_check_supported_key_len (void)
static int	bf_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
static int	ossl_des_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
static int	ossl_des3_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
static int	ossl_cast_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
static int	ossl_aes_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
static int	ossl_aes_ecb_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
static int	ossl_aes_cbc_init (PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
int	px_find_cipher (const char *name, PX_Cipher **res)

Variables
static OSSLDigest *	open_digests = NULL
static bool	digest_resowner_callback_registered = false
static int	px_openssl_initialized = 0
static OSSLCipher *	open_ciphers = NULL
static bool	cipher_resowner_callback_registered = false
static PX_Alias	ossl_aliases []
static const struct ossl_cipher	ossl_bf_cbc
static const struct ossl_cipher	ossl_bf_ecb
static const struct ossl_cipher	ossl_bf_cfb
static const struct ossl_cipher	ossl_des_ecb
static const struct ossl_cipher	ossl_des_cbc
static const struct ossl_cipher	ossl_des3_ecb
static const struct ossl_cipher	ossl_des3_cbc
static const struct ossl_cipher	ossl_cast_ecb
static const struct ossl_cipher	ossl_cast_cbc
static const struct ossl_cipher	ossl_aes_ecb
static const struct ossl_cipher	ossl_aes_cbc
static const struct ossl_cipher_lookup	ossl_cipher_types []

Macro Definition Documentation

MAX_IV

#define MAX_IV   (128/8)

Definition at line 46 of file openssl.c.

MAX_KEY

#define MAX_KEY   (512/8)

Definition at line 45 of file openssl.c.

Typedef Documentation

ossl_EVP_cipher_func

typedef const EVP_CIPHER*(* ossl_EVP_cipher_func) (void)

Definition at line 252 of file openssl.c.

OSSLCipher

typedef struct OSSLCipher OSSLCipher

OSSLDigest

typedef struct OSSLDigest OSSLDigest

Function Documentation

bf_check_supported_key_len()

static int bf_check_supported_key_len ( void  )

static

Definition at line 439 of file openssl.c.

{
    static const uint8 key[56] = {
        0xf0, 0xe1, 0xd2, 0xc3, 0xb4, 0xa5, 0x96, 0x87, 0x78, 0x69,
        0x5a, 0x4b, 0x3c, 0x2d, 0x1e, 0x0f, 0x00, 0x11, 0x22, 0x33,
        0x44, 0x55, 0x66, 0x77, 0x04, 0x68, 0x91, 0x04, 0xc2, 0xfd,
        0x3b, 0x2f, 0x58, 0x40, 0x23, 0x64, 0x1a, 0xba, 0x61, 0x76,
        0x1f, 0x1f, 0x1f, 0x1f, 0x0e, 0x0e, 0x0e, 0x0e, 0xff, 0xff,
        0xff, 0xff, 0xff, 0xff, 0xff, 0xff
    };
 
    static const uint8 data[8] = {0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};
    static const uint8 res[8] = {0xc0, 0x45, 0x04, 0x01, 0x2e, 0x4e, 0x1f, 0x53};
    uint8       out[8];
    EVP_CIPHER_CTX *evp_ctx;
    int         outlen;
    int         status = 0;
 
    /* encrypt with 448bits key and verify output */
    evp_ctx = EVP_CIPHER_CTX_new();
    if (!evp_ctx)
        return 0;
    if (!EVP_EncryptInit_ex(evp_ctx, EVP_bf_ecb(), NULL, NULL, NULL))
        goto leave;
    if (!EVP_CIPHER_CTX_set_key_length(evp_ctx, 56))
        goto leave;
    if (!EVP_EncryptInit_ex(evp_ctx, NULL, NULL, key, NULL))
        goto leave;
 
    if (!EVP_EncryptUpdate(evp_ctx, out, &outlen, data, 8))
        goto leave;
 
    if (memcmp(out, res, 8) != 0)
        goto leave;             /* Output does not match -> strong cipher is
                                 * not supported */
    status = 1;
 
leave:
    EVP_CIPHER_CTX_free(evp_ctx);
    return status;
}

References data, OSSLCipher::evp_ctx, sort-test::key, and res.

Referenced by bf_init().

bf_init()

static int bf_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 482 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    unsigned    bs = gen_ossl_block_size(c);
    static int  bf_is_strong = -1;
 
    /*
     * Test if key len is supported. BF_set_key silently cut large keys and it
     * could be a problem when user transfer crypted data from one server to
     * another.
     */
 
    if (bf_is_strong == -1)
        bf_is_strong = bf_check_supported_key_len();
 
    if (!bf_is_strong && klen > 16)
        return PXE_KEY_TOO_BIG;
 
    /* Key len is supported. We can use it. */
    od->klen = klen;
    memcpy(od->key, key, klen);
 
    if (iv)
        memcpy(od->iv, iv, bs);
    else
        memset(od->iv, 0, bs);
    return 0;
}

References bf_check_supported_key_len(), gen_ossl_block_size(), OSSLCipher::iv, OSSLCipher::key, sort-test::key, OSSLCipher::klen, and PXE_KEY_TOO_BIG.

cipher_free_callback()

static void cipher_free_callback ( ResourceReleasePhase  phase, bool  isCommit, bool  isTopLevel, void *  arg  )

static

Definition at line 308 of file openssl.c.

{
    OSSLCipher *curr;
    OSSLCipher *next;
 
    if (phase != RESOURCE_RELEASE_AFTER_LOCKS)
        return;
 
    next = open_ciphers;
    while (next)
    {
        curr = next;
        next = curr->next;
 
        if (curr->owner == CurrentResourceOwner)
        {
            if (isCommit)
                elog(WARNING, "pgcrypto cipher reference leak: cipher %p still referenced", curr);
            free_openssl_cipher(curr);
        }
    }
}

References CurrentResourceOwner, elog(), free_openssl_cipher(), next, OSSLCipher::next, open_ciphers, OSSLCipher::owner, RESOURCE_RELEASE_AFTER_LOCKS, and WARNING.

Referenced by px_find_cipher().

digest_block_size()

static unsigned digest_block_size ( PX_MD *  h )

static

Definition at line 126 of file openssl.c.

{
    OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
    int         result = EVP_MD_CTX_block_size(digest->ctx);
 
    if (result < 0)
        elog(ERROR, "EVP_MD_CTX_block_size() failed");
 
    return result;
}

References OSSLDigest::ctx, elog(), ERROR, px_digest::p, and px_digest::ptr.

Referenced by px_find_digest().

digest_finish()

static void digest_finish ( PX_MD *  h, uint8 *  dst  )

static

Definition at line 156 of file openssl.c.

{
    OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
 
    if (!EVP_DigestFinal_ex(digest->ctx, dst, NULL))
        elog(ERROR, "EVP_DigestFinal_ex() failed");
}

References OSSLDigest::ctx, elog(), ERROR, if(), px_digest::p, and px_digest::ptr.

Referenced by px_find_digest().

digest_free()

static void digest_free ( PX_MD *  h )

static

Definition at line 165 of file openssl.c.

{
    OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
 
    free_openssl_digest(digest);
    pfree(h);
}

References free_openssl_digest(), px_digest::p, pfree(), and px_digest::ptr.

Referenced by px_find_digest().

digest_free_callback()

static void digest_free_callback ( ResourceReleasePhase  phase, bool  isCommit, bool  isTopLevel, void *  arg  )

static

Definition at line 87 of file openssl.c.

{
    OSSLDigest *curr;
    OSSLDigest *next;
 
    if (phase != RESOURCE_RELEASE_AFTER_LOCKS)
        return;
 
    next = open_digests;
    while (next)
    {
        curr = next;
        next = curr->next;
 
        if (curr->owner == CurrentResourceOwner)
        {
            if (isCommit)
                elog(WARNING, "pgcrypto digest reference leak: digest %p still referenced", curr);
            free_openssl_digest(curr);
        }
    }
}

References CurrentResourceOwner, elog(), free_openssl_digest(), next, OSSLDigest::next, open_digests, OSSLDigest::owner, RESOURCE_RELEASE_AFTER_LOCKS, and WARNING.

Referenced by px_find_digest().

digest_reset()

static void digest_reset ( PX_MD *  h )

static

Definition at line 138 of file openssl.c.

{
    OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
 
    if (!EVP_DigestInit_ex(digest->ctx, digest->algo, NULL))
        elog(ERROR, "EVP_DigestInit_ex() failed");
}

References OSSLDigest::algo, OSSLDigest::ctx, elog(), ERROR, if(), px_digest::p, and px_digest::ptr.

Referenced by px_find_digest().

digest_result_size()

static unsigned digest_result_size ( PX_MD *  h )

static

Definition at line 114 of file openssl.c.

{
    OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
    int         result = EVP_MD_CTX_size(digest->ctx);
 
    if (result < 0)
        elog(ERROR, "EVP_MD_CTX_size() failed");
 
    return result;
}

References OSSLDigest::ctx, elog(), ERROR, px_digest::p, and px_digest::ptr.

Referenced by px_find_digest().

digest_update()

static void digest_update ( PX_MD *  h, const uint8 *  data, unsigned  dlen  )

static

Definition at line 147 of file openssl.c.

{
    OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
 
    if (!EVP_DigestUpdate(digest->ctx, data, dlen))
        elog(ERROR, "EVP_DigestUpdate() failed");
}

References OSSLDigest::ctx, data, elog(), ERROR, if(), px_digest::p, and px_digest::ptr.

Referenced by px_find_digest().

free_openssl_cipher()

static void free_openssl_cipher ( OSSLCipher *  od )

static

Definition at line 292 of file openssl.c.

{
    EVP_CIPHER_CTX_free(od->evp_ctx);
    if (od->prev)
        od->prev->next = od->next;
    else
        open_ciphers = od->next;
    if (od->next)
        od->next->prev = od->prev;
    pfree(od);
}

References OSSLCipher::evp_ctx, OSSLCipher::next, open_ciphers, pfree(), and OSSLCipher::prev.

Referenced by cipher_free_callback(), and gen_ossl_free().

free_openssl_digest()

static void free_openssl_digest ( OSSLDigest *  digest )

static

Definition at line 71 of file openssl.c.

{
    EVP_MD_CTX_destroy(digest->ctx);
    if (digest->prev)
        digest->prev->next = digest->next;
    else
        open_digests = digest->next;
    if (digest->next)
        digest->next->prev = digest->prev;
    pfree(digest);
}

References OSSLDigest::ctx, OSSLDigest::next, open_digests, pfree(), and OSSLDigest::prev.

Referenced by digest_free(), and digest_free_callback().

gen_ossl_block_size()

static unsigned gen_ossl_block_size ( PX_Cipher *  c )

static

Definition at line 337 of file openssl.c.

{
    OSSLCipher *od = (OSSLCipher *) c->ptr;
 
    return od->ciph->block_size;
}

References ossl_cipher::block_size, and OSSLCipher::ciph.

Referenced by bf_init(), ossl_aes_init(), ossl_cast_init(), ossl_des3_init(), ossl_des_init(), and px_find_cipher().

gen_ossl_decrypt()

static int gen_ossl_decrypt ( PX_Cipher *  c, int  padding, const uint8 *  data, unsigned  dlen, uint8 *  res, unsigned *  rlen  )

static

Definition at line 372 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    int         outlen,
                outlen2;
 
    if (!od->init)
    {
        if (!EVP_DecryptInit_ex(od->evp_ctx, od->evp_ciph, NULL, NULL, NULL))
            return PXE_CIPHER_INIT;
        if (!EVP_CIPHER_CTX_set_padding(od->evp_ctx, padding))
            return PXE_CIPHER_INIT;
        if (!EVP_CIPHER_CTX_set_key_length(od->evp_ctx, od->klen))
            return PXE_CIPHER_INIT;
        if (!EVP_DecryptInit_ex(od->evp_ctx, NULL, NULL, od->key, od->iv))
            return PXE_CIPHER_INIT;
        od->init = true;
    }
 
    if (!EVP_DecryptUpdate(od->evp_ctx, res, &outlen, data, dlen))
        return PXE_DECRYPT_FAILED;
    if (!EVP_DecryptFinal_ex(od->evp_ctx, res + outlen, &outlen2))
        return PXE_DECRYPT_FAILED;
    *rlen = outlen + outlen2;
 
    return 0;
}

References data, OSSLCipher::evp_ciph, OSSLCipher::evp_ctx, OSSLCipher::init, OSSLCipher::iv, OSSLCipher::key, OSSLCipher::klen, PXE_CIPHER_INIT, PXE_DECRYPT_FAILED, and res.

Referenced by px_find_cipher().

gen_ossl_encrypt()

static int gen_ossl_encrypt ( PX_Cipher *  c, int  padding, const uint8 *  data, unsigned  dlen, uint8 *  res, unsigned *  rlen  )

static

Definition at line 402 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    int         outlen,
                outlen2;
 
    if (!od->init)
    {
        if (!EVP_EncryptInit_ex(od->evp_ctx, od->evp_ciph, NULL, NULL, NULL))
            return PXE_CIPHER_INIT;
        if (!EVP_CIPHER_CTX_set_padding(od->evp_ctx, padding))
            return PXE_CIPHER_INIT;
        if (!EVP_CIPHER_CTX_set_key_length(od->evp_ctx, od->klen))
            return PXE_CIPHER_INIT;
        if (!EVP_EncryptInit_ex(od->evp_ctx, NULL, NULL, od->key, od->iv))
            return PXE_CIPHER_INIT;
        od->init = true;
    }
 
    if (!EVP_EncryptUpdate(od->evp_ctx, res, &outlen, data, dlen))
        return PXE_ENCRYPT_FAILED;
    if (!EVP_EncryptFinal_ex(od->evp_ctx, res + outlen, &outlen2))
        return PXE_ENCRYPT_FAILED;
    *rlen = outlen + outlen2;
 
    return 0;
}

References data, OSSLCipher::evp_ciph, OSSLCipher::evp_ctx, OSSLCipher::init, OSSLCipher::iv, OSSLCipher::key, OSSLCipher::klen, PXE_CIPHER_INIT, PXE_ENCRYPT_FAILED, and res.

Referenced by px_find_cipher().

gen_ossl_free()

static void gen_ossl_free ( PX_Cipher *  c )

static

Definition at line 363 of file openssl.c.

{
    OSSLCipher *od = (OSSLCipher *) c->ptr;
 
    free_openssl_cipher(od);
    pfree(c);
}

References free_openssl_cipher(), and pfree().

Referenced by px_find_cipher().

gen_ossl_iv_size()

static unsigned gen_ossl_iv_size ( PX_Cipher *  c )

static

Definition at line 353 of file openssl.c.

{
    unsigned    ivlen;
    OSSLCipher *od = (OSSLCipher *) c->ptr;
 
    ivlen = od->ciph->block_size;
    return ivlen;
}

References ossl_cipher::block_size, and OSSLCipher::ciph.

Referenced by px_find_cipher().

gen_ossl_key_size()

static unsigned gen_ossl_key_size ( PX_Cipher *  c )

static

Definition at line 345 of file openssl.c.

{
    OSSLCipher *od = (OSSLCipher *) c->ptr;
 
    return od->ciph->max_key_size;
}

References OSSLCipher::ciph, and ossl_cipher::max_key_size.

Referenced by px_find_cipher().

ossl_aes_cbc_init()

static int ossl_aes_cbc_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 625 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    int         err;
 
    err = ossl_aes_init(c, key, klen, iv);
    if (err)
        return err;
 
    switch (od->klen)
    {
        case 128 / 8:
            od->evp_ciph = EVP_aes_128_cbc();
            break;
        case 192 / 8:
            od->evp_ciph = EVP_aes_192_cbc();
            break;
        case 256 / 8:
            od->evp_ciph = EVP_aes_256_cbc();
            break;
        default:
            /* shouldn't happen */
            err = PXE_CIPHER_INIT;
            break;
    }
 
    return err;
}

References err(), OSSLCipher::evp_ciph, OSSLCipher::iv, sort-test::key, OSSLCipher::klen, ossl_aes_init(), and PXE_CIPHER_INIT.

ossl_aes_ecb_init()

static int ossl_aes_ecb_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 595 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    int         err;
 
    err = ossl_aes_init(c, key, klen, iv);
    if (err)
        return err;
 
    switch (od->klen)
    {
        case 128 / 8:
            od->evp_ciph = EVP_aes_128_ecb();
            break;
        case 192 / 8:
            od->evp_ciph = EVP_aes_192_ecb();
            break;
        case 256 / 8:
            od->evp_ciph = EVP_aes_256_ecb();
            break;
        default:
            /* shouldn't happen */
            err = PXE_CIPHER_INIT;
            break;
    }
 
    return err;
}

References err(), OSSLCipher::evp_ciph, OSSLCipher::iv, sort-test::key, OSSLCipher::klen, ossl_aes_init(), and PXE_CIPHER_INIT.

ossl_aes_init()

static int ossl_aes_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 570 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    unsigned    bs = gen_ossl_block_size(c);
 
    if (klen <= 128 / 8)
        od->klen = 128 / 8;
    else if (klen <= 192 / 8)
        od->klen = 192 / 8;
    else if (klen <= 256 / 8)
        od->klen = 256 / 8;
    else
        return PXE_KEY_TOO_BIG;
 
    memcpy(od->key, key, klen);
 
    if (iv)
        memcpy(od->iv, iv, bs);
    else
        memset(od->iv, 0, bs);
 
    return 0;
}

References gen_ossl_block_size(), OSSLCipher::iv, OSSLCipher::key, sort-test::key, OSSLCipher::klen, and PXE_KEY_TOO_BIG.

Referenced by ossl_aes_cbc_init(), and ossl_aes_ecb_init().

ossl_cast_init()

static int ossl_cast_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 552 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    unsigned    bs = gen_ossl_block_size(c);
 
    od->klen = klen;
    memcpy(od->key, key, klen);
 
    if (iv)
        memcpy(od->iv, iv, bs);
    else
        memset(od->iv, 0, bs);
    return 0;
}

References gen_ossl_block_size(), OSSLCipher::iv, OSSLCipher::key, sort-test::key, and OSSLCipher::klen.

ossl_des3_init()

static int ossl_des3_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 533 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    unsigned    bs = gen_ossl_block_size(c);
 
    od->klen = 24;
    memset(od->key, 0, 24);
    memcpy(od->key, key, klen > 24 ? 24 : klen);
 
    if (iv)
        memcpy(od->iv, iv, bs);
    else
        memset(od->iv, 0, bs);
    return 0;
}

References gen_ossl_block_size(), OSSLCipher::iv, OSSLCipher::key, sort-test::key, and OSSLCipher::klen.

ossl_des_init()

static int ossl_des_init ( PX_Cipher *  c, const uint8 *  key, unsigned  klen, const uint8 *  iv  )

static

Definition at line 514 of file openssl.c.

{
    OSSLCipher *od = c->ptr;
    unsigned    bs = gen_ossl_block_size(c);
 
    od->klen = 8;
    memset(od->key, 0, 8);
    memcpy(od->key, key, klen > 8 ? 8 : klen);
 
    if (iv)
        memcpy(od->iv, iv, bs);
    else
        memset(od->iv, 0, bs);
    return 0;
}

References gen_ossl_block_size(), OSSLCipher::iv, OSSLCipher::key, sort-test::key, and OSSLCipher::klen.

px_find_cipher()

int px_find_cipher	(	const char *	name,
		PX_Cipher **	res
	)

Definition at line 771 of file openssl.c.

{
    const struct ossl_cipher_lookup *i;
    PX_Cipher  *c = NULL;
    EVP_CIPHER_CTX *ctx;
    OSSLCipher *od;
 
    name = px_resolve_alias(ossl_aliases, name);
    for (i = ossl_cipher_types; i->name; i++)
        if (strcmp(i->name, name) == 0)
            break;
    if (i->name == NULL)
        return PXE_NO_CIPHER;
 
    if (!cipher_resowner_callback_registered)
    {
        RegisterResourceReleaseCallback(cipher_free_callback, NULL);
        cipher_resowner_callback_registered = true;
    }
 
    /*
     * Create an OSSLCipher object, an EVP_CIPHER_CTX object and a PX_Cipher.
     * The order is crucial, to make sure we don't leak anything on
     * out-of-memory or other error.
     */
    od = MemoryContextAllocZero(TopMemoryContext, sizeof(*od));
    od->ciph = i->ciph;
 
    /* Allocate an EVP_CIPHER_CTX object. */
    ctx = EVP_CIPHER_CTX_new();
    if (!ctx)
    {
        pfree(od);
        return PXE_CIPHER_INIT;
    }
 
    od->evp_ctx = ctx;
    od->owner = CurrentResourceOwner;
    od->next = open_ciphers;
    od->prev = NULL;
    open_ciphers = od;
 
    if (i->ciph->cipher_func)
        od->evp_ciph = i->ciph->cipher_func();
 
    /* The PX_Cipher is allocated in current memory context */
    c = palloc(sizeof(*c));
    c->block_size = gen_ossl_block_size;
    c->key_size = gen_ossl_key_size;
    c->iv_size = gen_ossl_iv_size;
    c->free = gen_ossl_free;
    c->init = od->ciph->init;
    c->encrypt = gen_ossl_encrypt;
    c->decrypt = gen_ossl_decrypt;
    c->ptr = od;
 
    *res = c;
    return 0;
}

References OSSLCipher::ciph, cipher_free_callback(), cipher_resowner_callback_registered, CurrentResourceOwner, OSSLCipher::evp_ciph, OSSLCipher::evp_ctx, gen_ossl_block_size(), gen_ossl_decrypt(), gen_ossl_encrypt(), gen_ossl_free(), gen_ossl_iv_size(), gen_ossl_key_size(), i, ossl_cipher::init, MemoryContextAllocZero(), name, OSSLCipher::next, open_ciphers, ossl_aliases, ossl_cipher_types, OSSLCipher::owner, palloc(), pfree(), OSSLCipher::prev, px_resolve_alias(), PXE_CIPHER_INIT, PXE_NO_CIPHER, RegisterResourceReleaseCallback(), res, and TopMemoryContext.

Referenced by pgp_load_cipher(), and px_find_combo().

px_find_digest()

int px_find_digest	(	const char *	name,
		PX_MD **	res
	)

Definition at line 178 of file openssl.c.

{
    const EVP_MD *md;
    EVP_MD_CTX *ctx;
    PX_MD      *h;
    OSSLDigest *digest;
 
    if (!px_openssl_initialized)
    {
        px_openssl_initialized = 1;
        OpenSSL_add_all_algorithms();
    }
 
    if (!digest_resowner_callback_registered)
    {
        RegisterResourceReleaseCallback(digest_free_callback, NULL);
        digest_resowner_callback_registered = true;
    }
 
    md = EVP_get_digestbyname(name);
    if (md == NULL)
        return PXE_NO_HASH;
 
    /*
     * Create an OSSLDigest object, an OpenSSL MD object, and a PX_MD object.
     * The order is crucial, to make sure we don't leak anything on
     * out-of-memory or other error.
     */
    digest = MemoryContextAlloc(TopMemoryContext, sizeof(*digest));
 
    ctx = EVP_MD_CTX_create();
    if (!ctx)
    {
        pfree(digest);
        return PXE_CIPHER_INIT;
    }
    if (EVP_DigestInit_ex(ctx, md, NULL) == 0)
    {
        EVP_MD_CTX_destroy(ctx);
        pfree(digest);
        return PXE_CIPHER_INIT;
    }
 
    digest->algo = md;
    digest->ctx = ctx;
    digest->owner = CurrentResourceOwner;
    digest->next = open_digests;
    digest->prev = NULL;
    open_digests = digest;
 
    /* The PX_MD object is allocated in the current memory context. */
    h = palloc(sizeof(*h));
    h->result_size = digest_result_size;
    h->block_size = digest_block_size;
    h->reset = digest_reset;
    h->update = digest_update;
    h->finish = digest_finish;
    h->free = digest_free;
    h->p.ptr = (void *) digest;
 
    *res = h;
    return 0;
}

References OSSLDigest::algo, px_digest::block_size, OSSLDigest::ctx, CurrentResourceOwner, digest_block_size(), digest_finish(), digest_free(), digest_free_callback(), digest_reset(), digest_resowner_callback_registered, digest_result_size(), digest_update(), px_digest::finish, px_digest::free, MemoryContextAlloc(), name, OSSLDigest::next, open_digests, OSSLDigest::owner, px_digest::p, palloc(), pfree(), OSSLDigest::prev, px_digest::ptr, px_openssl_initialized, PXE_CIPHER_INIT, PXE_NO_HASH, RegisterResourceReleaseCallback(), res, px_digest::reset, px_digest::result_size, TopMemoryContext, and px_digest::update.

Referenced by pg_digest(), pgp_load_digest(), px_crypt_md5(), and px_find_hmac().

Variable Documentation

cipher_resowner_callback_registered

bool cipher_resowner_callback_registered = false

static

Definition at line 289 of file openssl.c.

Referenced by px_find_cipher().

digest_resowner_callback_registered

bool digest_resowner_callback_registered = false

static

Definition at line 68 of file openssl.c.

Referenced by px_find_digest().

open_ciphers

OSSLCipher* open_ciphers = NULL

static

Definition at line 288 of file openssl.c.

Referenced by cipher_free_callback(), free_openssl_cipher(), and px_find_cipher().

open_digests

OSSLDigest* open_digests = NULL

static

Definition at line 67 of file openssl.c.

Referenced by digest_free_callback(), free_openssl_digest(), and px_find_digest().

ossl_aes_cbc

const struct ossl_cipher ossl_aes_cbc

static

Initial value:

= {
    ossl_aes_cbc_init,
    NULL,                       
    128 / 8, 256 / 8
}

Definition at line 658 of file openssl.c.

ossl_aes_ecb

const struct ossl_cipher ossl_aes_ecb

static

Initial value:

= {
    ossl_aes_ecb_init,
    NULL,                       
    128 / 8, 256 / 8
}

Definition at line 658 of file openssl.c.

ossl_aliases

PX_Alias ossl_aliases[]

static

Initial value:

= {
    {"bf", "bf-cbc"},
    {"blowfish", "bf-cbc"},
    {"blowfish-cbc", "bf-cbc"},
    {"blowfish-ecb", "bf-ecb"},
    {"blowfish-cfb", "bf-cfb"},
    {"des", "des-cbc"},
    {"3des", "des3-cbc"},
    {"3des-ecb", "des3-ecb"},
    {"3des-cbc", "des3-cbc"},
    {"cast5", "cast5-cbc"},
    {"aes", "aes-cbc"},
    {"rijndael", "aes-cbc"},
    {"rijndael-cbc", "aes-cbc"},
    {"rijndael-ecb", "aes-ecb"},
    {NULL}
}

Definition at line 658 of file openssl.c.

Referenced by px_find_cipher().

ossl_bf_cbc

const struct ossl_cipher ossl_bf_cbc

static

Initial value:

= {
    bf_init,
    EVP_bf_cbc,
    64 / 8, 448 / 8
}

Definition at line 658 of file openssl.c.

ossl_bf_cfb

const struct ossl_cipher ossl_bf_cfb

static

Initial value:

= {
    bf_init,
    EVP_bf_cfb,
    64 / 8, 448 / 8
}

Definition at line 658 of file openssl.c.

ossl_bf_ecb

const struct ossl_cipher ossl_bf_ecb

static

Initial value:

= {
    bf_init,
    EVP_bf_ecb,
    64 / 8, 448 / 8
}

Definition at line 658 of file openssl.c.

ossl_cast_cbc

const struct ossl_cipher ossl_cast_cbc

static

Initial value:

= {
    ossl_cast_init,
    EVP_cast5_cbc,
    64 / 8, 128 / 8
}

Definition at line 658 of file openssl.c.

ossl_cast_ecb

const struct ossl_cipher ossl_cast_ecb

static

Initial value:

= {
    ossl_cast_init,
    EVP_cast5_ecb,
    64 / 8, 128 / 8
}

Definition at line 658 of file openssl.c.

ossl_cipher_types

const struct ossl_cipher_lookup ossl_cipher_types[]

static

Initial value:

= {
    {"bf-cbc", &ossl_bf_cbc},
    {"bf-ecb", &ossl_bf_ecb},
    {"bf-cfb", &ossl_bf_cfb},
    {"des-ecb", &ossl_des_ecb},
    {"des-cbc", &ossl_des_cbc},
    {"des3-ecb", &ossl_des3_ecb},
    {"des3-cbc", &ossl_des3_cbc},
    {"cast5-ecb", &ossl_cast_ecb},
    {"cast5-cbc", &ossl_cast_cbc},
    {"aes-ecb", &ossl_aes_ecb},
    {"aes-cbc", &ossl_aes_cbc},
    {NULL}
}

Definition at line 658 of file openssl.c.

Referenced by px_find_cipher().

ossl_des3_cbc

const struct ossl_cipher ossl_des3_cbc

static

Initial value:

= {
    ossl_des3_init,
    EVP_des_ede3_cbc,
    64 / 8, 192 / 8
}

Definition at line 658 of file openssl.c.

ossl_des3_ecb

const struct ossl_cipher ossl_des3_ecb

static

Initial value:

= {
    ossl_des3_init,
    EVP_des_ede3_ecb,
    64 / 8, 192 / 8
}

Definition at line 658 of file openssl.c.

ossl_des_cbc

const struct ossl_cipher ossl_des_cbc

static

Initial value:

= {
    ossl_des_init,
    EVP_des_cbc,
    64 / 8, 64 / 8
}

Definition at line 658 of file openssl.c.

ossl_des_ecb

const struct ossl_cipher ossl_des_ecb

static

Initial value:

= {
    ossl_des_init,
    EVP_des_ecb,
    64 / 8, 64 / 8
}

Definition at line 658 of file openssl.c.

px_openssl_initialized

int px_openssl_initialized = 0

static

Definition at line 173 of file openssl.c.

Referenced by px_find_digest().