* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $Id: openssl.c,v 1.10 2001/11/20 18:54:07 momjian Exp $
+ * $Id: openssl.c,v 1.10.2.1 2005/03/13 23:42:07 neilc Exp $
*/
#include <postgres.h>
#include "px.h"
#include <openssl/evp.h>
-#include <openssl/blowfish.h>
+/*
+ * Hashes
+ */
static unsigned
digest_result_size(PX_MD * h)
{
px_free(h);
}
-/* CIPHERS */
+static int px_openssl_initialized = 0;
+
+/* PUBLIC functions */
+
+int
+px_find_digest(const char *name, PX_MD ** res)
+{
+ const EVP_MD *md;
+ EVP_MD_CTX *ctx;
+ PX_MD *h;
+
+ if (!px_openssl_initialized)
+ {
+ px_openssl_initialized = 1;
+ OpenSSL_add_all_algorithms();
+ }
+
+ md = EVP_get_digestbyname(name);
+ if (md == NULL)
+ return -1;
+
+ ctx = px_alloc(sizeof(*ctx));
+ EVP_DigestInit(ctx, md);
+
+ h = px_alloc(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 *) ctx;
+
+ *res = h;
+ return 0;
+}
/*
+ * Ciphers
+ *
* The problem with OpenSSL is that the EVP* family
* of functions does not allow enough flexibility
* and forces some of the parameters (keylen,
* padding) to SSL defaults.
+ *
+ * So need to manage ciphers ourselves.
*/
+struct ossl_cipher {
+ int (*init) (PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv);
+ int (*encrypt) (PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res);
+ int (*decrypt) (PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res);
+
+ int block_size;
+ int max_key_size;
+ int stream_cipher;
+};
typedef struct
{
BF_KEY key;
int num;
} bf;
- EVP_CIPHER_CTX evp_ctx;
+ struct
+ {
+ des_key_schedule key_schedule;
+ } des;
+ CAST_KEY cast_key;
} u;
- const EVP_CIPHER *evp_ciph;
uint8 key[EVP_MAX_KEY_LENGTH];
uint8 iv[EVP_MAX_IV_LENGTH];
unsigned klen;
unsigned init;
+ const struct ossl_cipher *ciph;
} ossldata;
-/* generic EVP */
+/* generic */
static unsigned
-gen_evp_block_size(PX_Cipher * c)
+gen_ossl_block_size(PX_Cipher * c)
{
ossldata *od = (ossldata *) c->ptr;
- return EVP_CIPHER_block_size(od->evp_ciph);
+ return od->ciph->block_size;
}
static unsigned
-gen_evp_key_size(PX_Cipher * c)
+gen_ossl_key_size(PX_Cipher * c)
{
ossldata *od = (ossldata *) c->ptr;
- return EVP_CIPHER_key_length(od->evp_ciph);
+ return od->ciph->max_key_size;
}
static unsigned
-gen_evp_iv_size(PX_Cipher * c)
+gen_ossl_iv_size(PX_Cipher * c)
{
unsigned ivlen;
ossldata *od = (ossldata *) c->ptr;
- ivlen = EVP_CIPHER_iv_length(od->evp_ciph);
+ ivlen = od->ciph->block_size;
return ivlen;
}
static void
-gen_evp_free(PX_Cipher * c)
+gen_ossl_free(PX_Cipher * c)
{
ossldata *od = (ossldata *) c->ptr;
pfree(c);
}
-/* fun */
+/* Blowfish */
static int
-gen_evp_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
+bf_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
{
- ossldata *od = (ossldata *) c->ptr;
- unsigned bs = gen_evp_block_size(c);
+ ossldata *od = c->ptr;
+ BF_set_key(&od->u.bf.key, klen, key);
if (iv)
- memcpy(od->iv, iv, bs);
+ memcpy(od->iv, iv, BF_BLOCK);
else
- memset(od->iv, 0, bs);
- memcpy(od->key, key, klen);
- od->klen = klen;
- od->init = 0;
+ memset(od->iv, 0, BF_BLOCK);
+ od->u.bf.num = 0;
return 0;
}
-static void
-_gen_init(PX_Cipher * c, int enc)
+static int
+bf_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
+ unsigned bs = gen_ossl_block_size(c);
+ unsigned i;
ossldata *od = c->ptr;
- od->evp_ciph->init(&od->u.evp_ctx, od->key, od->iv, enc);
- od->init = 1;
- od->u.evp_ctx.encrypt = enc;
+ for (i = 0; i < dlen / bs; i++)
+ BF_ecb_encrypt(data + i * bs, res + i * bs, &od->u.bf.key, BF_ENCRYPT);
+ return 0;
}
static int
-gen_evp_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+bf_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
+ unsigned bs = gen_ossl_block_size(c),
+ i;
ossldata *od = c->ptr;
- if (!od->init)
- _gen_init(c, 1);
- od->evp_ciph->do_cipher(&od->u.evp_ctx, res, data, dlen);
+ for (i = 0; i < dlen / bs; i++)
+ BF_ecb_encrypt(data + i * bs, res + i * bs, &od->u.bf.key, BF_DECRYPT);
return 0;
}
static int
-gen_evp_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+bf_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
ossldata *od = c->ptr;
- if (!od->init)
- _gen_init(c, 0);
- od->evp_ciph->do_cipher(&od->u.evp_ctx, res, data, dlen);
+ BF_cbc_encrypt(data, res, dlen, &od->u.bf.key, od->iv, BF_ENCRYPT);
return 0;
}
-/* Blowfish */
+static int
+bf_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+{
+ ossldata *od = c->ptr;
+
+ BF_cbc_encrypt(data, res, dlen, &od->u.bf.key, od->iv, BF_DECRYPT);
+ return 0;
+}
static int
-bf_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
+bf_cfb64_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
ossldata *od = c->ptr;
- BF_set_key(&od->u.bf.key, klen, key);
+ BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
+ &od->u.bf.num, BF_ENCRYPT);
+ return 0;
+}
+
+static int
+bf_cfb64_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+{
+ ossldata *od = c->ptr;
+
+ BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
+ &od->u.bf.num, BF_DECRYPT);
+ return 0;
+}
+
+/* DES */
+
+static int
+ossl_des_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
+{
+ ossldata *od = c->ptr;
+ des_cblock xkey;
+
+ memset(&xkey, 0, sizeof(xkey));
+ memcpy(&xkey, key, klen > 8 ? 8 : klen);
+ des_set_key(&xkey, od->u.des.key_schedule);
+ memset(&xkey, 0, sizeof(xkey));
+
if (iv)
- memcpy(od->iv, iv, BF_BLOCK);
+ memcpy(od->iv, iv, 8);
else
- memset(od->iv, 0, BF_BLOCK);
- od->u.bf.num = 0;
+ memset(od->iv, 0, 8);
return 0;
}
static int
-bf_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
{
- unsigned bs = gen_evp_block_size(c),
- i;
+ unsigned bs = gen_ossl_block_size(c);
+ unsigned i;
ossldata *od = c->ptr;
for (i = 0; i < dlen / bs; i++)
- BF_ecb_encrypt(data + i * bs, res + i * bs, &od->u.bf.key, BF_ENCRYPT);
+ des_ecb_encrypt((des_cblock*)(data + i * bs),
+ (des_cblock*)(res + i * bs),
+ od->u.des.key_schedule, 1);
return 0;
}
static int
-bf_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
{
- unsigned bs = gen_evp_block_size(c),
- i;
+ unsigned bs = gen_ossl_block_size(c);
+ unsigned i;
ossldata *od = c->ptr;
for (i = 0; i < dlen / bs; i++)
- BF_ecb_encrypt(data + i * bs, res + i * bs, &od->u.bf.key, BF_DECRYPT);
+ des_ecb_encrypt((des_cblock*)(data + i * bs),
+ (des_cblock*)(res + i * bs),
+ od->u.des.key_schedule, 0);
return 0;
}
static int
-bf_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
{
ossldata *od = c->ptr;
- BF_cbc_encrypt(data, res, dlen, &od->u.bf.key, od->iv, BF_ENCRYPT);
+ des_ncbc_encrypt(data, res, dlen, od->u.des.key_schedule,
+ (des_cblock*)od->iv, 1);
return 0;
}
static int
-bf_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
{
ossldata *od = c->ptr;
- BF_cbc_encrypt(data, res, dlen, &od->u.bf.key, od->iv, BF_DECRYPT);
+ des_ncbc_encrypt(data, res, dlen, od->u.des.key_schedule,
+ (des_cblock*)od->iv, 0);
return 0;
}
+/* CAST5 */
+
static int
-bf_cfb64_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_cast_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
{
ossldata *od = c->ptr;
+ unsigned bs = gen_ossl_block_size(c);
- BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
- &od->u.bf.num, BF_ENCRYPT);
+ CAST_set_key(&od->u.cast_key, klen, key);
+ if (iv)
+ memcpy(od->iv, iv, bs);
+ else
+ memset(od->iv, 0, bs);
return 0;
}
static int
-bf_cfb64_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_cast_ecb_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
+ unsigned bs = gen_ossl_block_size(c);
ossldata *od = c->ptr;
+ const uint8 *end = data + dlen - bs;
- BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
- &od->u.bf.num, BF_DECRYPT);
+ for (; data <= end; data += bs, res += bs)
+ CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_ENCRYPT);
return 0;
}
static int
-bf_ofb64_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_cast_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
+ unsigned bs = gen_ossl_block_size(c);
ossldata *od = c->ptr;
+ const uint8 *end = data + dlen - bs;
- BF_ofb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv, &od->u.bf.num);
+ for (; data <= end; data += bs, res += bs)
+ CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_DECRYPT);
return 0;
}
static int
-bf_ofb64_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_cast_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
{
ossldata *od = c->ptr;
- BF_ofb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv, &od->u.bf.num);
+ CAST_cbc_encrypt(data, res, dlen, &od->u.cast_key, od->iv, CAST_ENCRYPT);
+ return 0;
+}
+
+static int
+ossl_cast_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+{
+ ossldata *od = c->ptr;
+
+ CAST_cbc_encrypt(data, res, dlen, &od->u.cast_key, od->iv, CAST_DECRYPT);
return 0;
}
{"blowfish-cbc", "bf-cbc"},
{"blowfish-ecb", "bf-ecb"},
{"blowfish-cfb", "bf-cfb"},
- {"blowfish-ofb", "bf-ofb"},
+ {"des", "des-cbc"},
+ {"cast5", "cast5-cbc"},
{NULL}
};
-/*
-static PX_Alias ossl_mode_aliases [] = {
- { "cfb64", "cfb" },
- { "ofb64", "ofb" },
- { NULL }
-};*/
+static const struct ossl_cipher ossl_bf_cbc = {
+ bf_init, bf_cbc_encrypt, bf_cbc_decrypt,
+ 64/8, 448/8, 0
+};
+
+static const struct ossl_cipher ossl_bf_ecb = {
+ bf_init, bf_ecb_encrypt, bf_ecb_decrypt,
+ 64/8, 448/8, 0
+};
+
+static const struct ossl_cipher ossl_bf_cfb = {
+ bf_init, bf_cfb64_encrypt, bf_cfb64_decrypt,
+ 64/8, 448/8, 1
+};
+
+static const struct ossl_cipher ossl_des_ecb = {
+ ossl_des_init, ossl_des_ecb_encrypt, ossl_des_ecb_decrypt,
+ 64/8, 64/8, 0
+};
+
+static const struct ossl_cipher ossl_des_cbc = {
+ ossl_des_init, ossl_des_cbc_encrypt, ossl_des_cbc_decrypt,
+ 64/8, 64/8, 0
+};
+
+static const struct ossl_cipher ossl_cast_ecb = {
+ ossl_cast_init, ossl_cast_ecb_encrypt, ossl_cast_ecb_decrypt,
+ 64/8, 128/8, 0
+};
+
+static const struct ossl_cipher ossl_cast_cbc = {
+ ossl_cast_init, ossl_cast_cbc_encrypt, ossl_cast_cbc_decrypt,
+ 64/8, 128/8, 0
+};
/*
* Special handlers
*/
-struct
+static const struct
{
- char *name;
- PX_Cipher cf;
-} spec_types[] =
+ const char *name;
+ const struct ossl_cipher *ciph;
+} ossl_cipher_types[] =
{
{
- "bf-cbc",
- {
- gen_evp_block_size, gen_evp_key_size, gen_evp_iv_size,
- bf_init, bf_cbc_encrypt, bf_cbc_decrypt, gen_evp_free
- }
+ "bf-cbc", &ossl_bf_cbc
},
{
- "bf-ecb",
- {
- gen_evp_block_size, gen_evp_key_size, gen_evp_iv_size,
- bf_init, bf_ecb_encrypt, bf_ecb_decrypt, gen_evp_free
- }
+ "bf-ecb", &ossl_bf_ecb
},
{
- "bf-cfb",
- {
- gen_evp_block_size, gen_evp_key_size, gen_evp_iv_size,
- bf_init, bf_cfb64_encrypt, bf_cfb64_decrypt, gen_evp_free
- }
+ "bf-cfb", &ossl_bf_cfb
},
{
- "bf-ofb",
- {
- gen_evp_block_size, gen_evp_key_size, gen_evp_iv_size,
- bf_init, bf_ofb64_encrypt, bf_ofb64_decrypt, gen_evp_free
- }
+ "des-ecb", &ossl_des_ecb
+ },
+ {
+ "des-cbc", &ossl_des_cbc
+ },
+ {
+ "cast5-ecb", &ossl_cast_ecb
+ },
+ {
+ "cast5-cbc", &ossl_cast_cbc
},
{
NULL
}
};
-/*
- * Generic EVP_* functions handler
- */
-static PX_Cipher gen_evp_handler = {
- gen_evp_block_size, gen_evp_key_size, gen_evp_iv_size,
- gen_evp_init, gen_evp_encrypt, gen_evp_decrypt, gen_evp_free
-};
-
-static int px_openssl_initialized = 0;
-
-/* ATM not needed
-static void *o_alloc(unsigned s) { return px_alloc(s); }
-static void *o_realloc(void *p) { return px_realloc(p); }
-static void o_free(void *p) { px_free(p); }
-*/
-
/* PUBLIC functions */
-int
-px_find_digest(const char *name, PX_MD ** res)
-{
- const EVP_MD *md;
- EVP_MD_CTX *ctx;
- PX_MD *h;
-
- if (!px_openssl_initialized)
- {
- px_openssl_initialized = 1;
- /* CRYPTO_set_mem_functions(o_alloc, o_realloc, o_free); */
- OpenSSL_add_all_algorithms();
- }
-
- md = EVP_get_digestbyname(name);
- if (md == NULL)
- return -1;
-
- ctx = px_alloc(sizeof(*ctx));
- EVP_DigestInit(ctx, md);
-
- h = px_alloc(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 *) ctx;
-
- *res = h;
- return 0;
-}
-
-
int
px_find_cipher(const char *name, PX_Cipher ** res)
{
PX_Cipher *c = NULL,
*csrc;
ossldata *od;
-
- const EVP_CIPHER *evp_c;
-
- if (!px_openssl_initialized)
- {
- px_openssl_initialized = 1;
- /* CRYPTO_set_mem_functions(o_alloc, o_realloc, o_free); */
- OpenSSL_add_all_algorithms();
- }
+ const struct ossl_cipher *ossl_ciph = NULL;
name = px_resolve_alias(ossl_aliases, name);
- evp_c = EVP_get_cipherbyname(name);
- if (evp_c == NULL)
+ for (i = 0; ossl_cipher_types[i].name; i++) {
+ if (!strcmp(ossl_cipher_types[i].name, name)) {
+ ossl_ciph = ossl_cipher_types[i].ciph;
+ break;
+ }
+ }
+ if (ossl_ciph == NULL)
return -1;
od = px_alloc(sizeof(*od));
memset(od, 0, sizeof(*od));
- od->evp_ciph = evp_c;
+ od->ciph = ossl_ciph;
csrc = NULL;
- for (i = 0; spec_types[i].name; i++)
- if (!strcmp(name, spec_types[i].name))
- {
- csrc = &spec_types[i].cf;
- break;
- }
-
- if (csrc == NULL)
- csrc = &gen_evp_handler;
-
c = px_alloc(sizeof(*c));
- memcpy(c, csrc, 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 = ossl_ciph->init;
+ c->encrypt = ossl_ciph->encrypt;
+ c->decrypt = ossl_ciph->decrypt;
c->ptr = od;
*res = c;
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