* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * $Id: openssl.c,v 1.9 2001/11/20 15:50:53 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/pgcrypto/openssl.c,v 1.30 2006/10/04 00:29:46 momjian Exp $
*/
-#include <postgres.h>
+#include "postgres.h"
#include "px.h"
#include <openssl/evp.h>
#include <openssl/blowfish.h>
+#include <openssl/cast.h>
+#include <openssl/des.h>
+#include <openssl/rand.h>
+#include <openssl/err.h>
-static uint
+/*
+ * Max lengths we might want to handle.
+ */
+#define MAX_KEY (512/8)
+#define MAX_IV (128/8)
+
+/*
+ * Compatibility with OpenSSL 0.9.6
+ *
+ * It needs AES and newer DES and digest API.
+ */
+#if OPENSSL_VERSION_NUMBER >= 0x00907000L
+
+/*
+ * Nothing needed for OpenSSL 0.9.7+
+ */
+
+#include <openssl/aes.h>
+#else /* old OPENSSL */
+
+/*
+ * Emulate OpenSSL AES.
+ */
+
+#include "rijndael.c"
+
+#define AES_ENCRYPT 1
+#define AES_DECRYPT 0
+#define AES_KEY rijndael_ctx
+
+#define AES_set_encrypt_key(key, kbits, ctx) \
+ aes_set_key((ctx), (key), (kbits), 1)
+
+#define AES_set_decrypt_key(key, kbits, ctx) \
+ aes_set_key((ctx), (key), (kbits), 0)
+
+#define AES_ecb_encrypt(src, dst, ctx, enc) \
+ do { \
+ memcpy((dst), (src), 16); \
+ if (enc) \
+ aes_ecb_encrypt((ctx), (dst), 16); \
+ else \
+ aes_ecb_decrypt((ctx), (dst), 16); \
+ } while (0)
+
+#define AES_cbc_encrypt(src, dst, len, ctx, iv, enc) \
+ do { \
+ memcpy((dst), (src), (len)); \
+ if (enc) { \
+ aes_cbc_encrypt((ctx), (iv), (dst), (len)); \
+ memcpy((iv), (dst) + (len) - 16, 16); \
+ } else { \
+ aes_cbc_decrypt((ctx), (iv), (dst), (len)); \
+ memcpy(iv, (src) + (len) - 16, 16); \
+ } \
+ } while (0)
+
+/*
+ * Emulate DES_* API
+ */
+
+#define DES_key_schedule des_key_schedule
+#define DES_cblock des_cblock
+#define DES_set_key(k, ks) \
+ des_set_key((k), *(ks))
+#define DES_ecb_encrypt(i, o, k, e) \
+ des_ecb_encrypt((i), (o), *(k), (e))
+#define DES_ncbc_encrypt(i, o, l, k, iv, e) \
+ des_ncbc_encrypt((i), (o), (l), *(k), (iv), (e))
+#define DES_ecb3_encrypt(i, o, k1, k2, k3, e) \
+ des_ecb3_encrypt((des_cblock *)(i), (des_cblock *)(o), \
+ *(k1), *(k2), *(k3), (e))
+#define DES_ede3_cbc_encrypt(i, o, l, k1, k2, k3, iv, e) \
+ des_ede3_cbc_encrypt((i), (o), \
+ (l), *(k1), *(k2), *(k3), (iv), (e))
+
+/*
+ * Emulate newer digest API.
+ */
+
+static void
+EVP_MD_CTX_init(EVP_MD_CTX *ctx)
+{
+ memset(ctx, 0, sizeof(*ctx));
+}
+
+static int
+EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx)
+{
+ memset(ctx, 0, sizeof(*ctx));
+ return 1;
+}
+
+static int
+EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *md, void *engine)
+{
+ EVP_DigestInit(ctx, md);
+ return 1;
+}
+
+static int
+EVP_DigestFinal_ex(EVP_MD_CTX *ctx, unsigned char *res, unsigned int *len)
+{
+ EVP_DigestFinal(ctx, res, len);
+ return 1;
+}
+#endif /* old OpenSSL */
+
+/*
+ * Provide SHA2 for older OpenSSL < 0.9.8
+ */
+#if OPENSSL_VERSION_NUMBER < 0x00908000L
+
+#include "sha2.c"
+#include "internal-sha2.c"
+
+typedef void (*init_f) (PX_MD * md);
+
+static int
+compat_find_digest(const char *name, PX_MD ** res)
+{
+ init_f init = NULL;
+
+ if (pg_strcasecmp(name, "sha224") == 0)
+ init = init_sha224;
+ else if (pg_strcasecmp(name, "sha256") == 0)
+ init = init_sha256;
+ else if (pg_strcasecmp(name, "sha384") == 0)
+ init = init_sha384;
+ else if (pg_strcasecmp(name, "sha512") == 0)
+ init = init_sha512;
+ else
+ return PXE_NO_HASH;
+
+ *res = px_alloc(sizeof(PX_MD));
+ init(*res);
+ return 0;
+}
+#else
+#define compat_find_digest(name, res) (PXE_NO_HASH)
+#endif
+
+/*
+ * Hashes
+ */
+
+typedef struct OSSLDigest
+{
+ const EVP_MD *algo;
+ EVP_MD_CTX ctx;
+} OSSLDigest;
+
+static unsigned
digest_result_size(PX_MD * h)
{
- return EVP_MD_CTX_size((EVP_MD_CTX *) h->p.ptr);
+ OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
+
+ return EVP_MD_CTX_size(&digest->ctx);
}
-static uint
+static unsigned
digest_block_size(PX_MD * h)
{
- return EVP_MD_CTX_block_size((EVP_MD_CTX *) h->p.ptr);
+ OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
+
+ return EVP_MD_CTX_block_size(&digest->ctx);
}
static void
digest_reset(PX_MD * h)
{
- EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
- const EVP_MD *md;
-
- md = EVP_MD_CTX_md(ctx);
+ OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
- EVP_DigestInit(ctx, md);
+ EVP_DigestInit_ex(&digest->ctx, digest->algo, NULL);
}
static void
digest_update(PX_MD * h, const uint8 *data, unsigned dlen)
{
- EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
+ OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
- EVP_DigestUpdate(ctx, data, dlen);
+ EVP_DigestUpdate(&digest->ctx, data, dlen);
}
static void
digest_finish(PX_MD * h, uint8 *dst)
{
- EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
+ OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
- EVP_DigestFinal(ctx, dst, NULL);
+ EVP_DigestFinal_ex(&digest->ctx, dst, NULL);
}
static void
digest_free(PX_MD * h)
{
- EVP_MD_CTX *ctx = (EVP_MD_CTX *) h->p.ptr;
+ OSSLDigest *digest = (OSSLDigest *) h->p.ptr;
+
+ EVP_MD_CTX_cleanup(&digest->ctx);
- px_free(ctx);
+ px_free(digest);
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;
+ PX_MD *h;
+ OSSLDigest *digest;
+
+ if (!px_openssl_initialized)
+ {
+ px_openssl_initialized = 1;
+ OpenSSL_add_all_algorithms();
+ }
+
+ md = EVP_get_digestbyname(name);
+ if (md == NULL)
+ return compat_find_digest(name, res);
+
+ digest = px_alloc(sizeof(*digest));
+ digest->algo = md;
+
+ EVP_MD_CTX_init(&digest->ctx);
+ if (EVP_DigestInit_ex(&digest->ctx, digest->algo, NULL) == 0)
+ return -1;
+
+ 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 *) digest;
+
+ *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;
+ struct
+ {
+ DES_key_schedule k1,
+ k2,
+ k3;
+ } des3;
+ CAST_KEY cast_key;
+ AES_KEY aes_key;
} u;
- const EVP_CIPHER *evp_ciph;
- uint8 key[EVP_MAX_KEY_LENGTH];
- uint8 iv[EVP_MAX_IV_LENGTH];
+ uint8 key[MAX_KEY];
+ uint8 iv[MAX_IV];
unsigned klen;
unsigned init;
+ const struct ossl_cipher *ciph;
} ossldata;
-/* generic EVP */
+/* generic */
-static uint
-gen_evp_block_size(PX_Cipher * c)
+static unsigned
+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 uint
-gen_evp_key_size(PX_Cipher * c)
+static unsigned
+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 uint
-gen_evp_iv_size(PX_Cipher * c)
+static unsigned
+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;
memset(od, 0, sizeof(*od));
- pfree(od);
- pfree(c);
+ px_free(od);
+ px_free(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;
}
+/* DES3 */
+
static int
-bf_cfb64_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des3_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
{
ossldata *od = c->ptr;
+ DES_cblock xkey1,
+ xkey2,
+ xkey3;
+
+ memset(&xkey1, 0, sizeof(xkey1));
+ memset(&xkey2, 0, sizeof(xkey2));
+ memset(&xkey3, 0, sizeof(xkey3));
+ memcpy(&xkey1, key, klen > 8 ? 8 : klen);
+ if (klen > 8)
+ memcpy(&xkey2, key + 8, (klen - 8) > 8 ? 8 : (klen - 8));
+ if (klen > 16)
+ memcpy(&xkey3, key + 16, (klen - 16) > 8 ? 8 : (klen - 16));
+
+ DES_set_key(&xkey1, &od->u.des3.k1);
+ DES_set_key(&xkey2, &od->u.des3.k2);
+ DES_set_key(&xkey3, &od->u.des3.k3);
+ memset(&xkey1, 0, sizeof(xkey1));
+ memset(&xkey2, 0, sizeof(xkey2));
+ memset(&xkey3, 0, sizeof(xkey3));
- BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
- &od->u.bf.num, BF_ENCRYPT);
+ if (iv)
+ memcpy(od->iv, iv, 8);
+ else
+ memset(od->iv, 0, 8);
return 0;
}
static int
-bf_cfb64_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des3_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;
+
+ for (i = 0; i < dlen / bs; i++)
+ DES_ecb3_encrypt((void *) (data + i * bs), (void *) (res + i * bs),
+ &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3, 1);
+ return 0;
+}
+
+static int
+ossl_des3_ecb_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
{
+ unsigned bs = gen_ossl_block_size(c);
+ unsigned i;
ossldata *od = c->ptr;
- BF_cfb64_encrypt(data, res, dlen, &od->u.bf.key, od->iv,
- &od->u.bf.num, BF_DECRYPT);
+ for (i = 0; i < dlen / bs; i++)
+ DES_ecb3_encrypt((void *) (data + i * bs), (void *) (res + i * bs),
+ &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3, 0);
return 0;
}
static int
-bf_ofb64_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des3_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);
+ DES_ede3_cbc_encrypt(data, res, dlen,
+ &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3,
+ (DES_cblock *) od->iv, 1);
return 0;
}
static int
-bf_ofb64_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen, uint8 *res)
+ossl_des3_cbc_decrypt(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);
+ DES_ede3_cbc_encrypt(data, res, dlen,
+ &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3,
+ (DES_cblock *) od->iv, 0);
+ return 0;
+}
+
+/* CAST5 */
+
+static int
+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);
+
+ 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
+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;
+
+ for (; data <= end; data += bs, res += bs)
+ CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_ENCRYPT);
+ return 0;
+}
+
+static int
+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;
+
+ for (; data <= end; data += bs, res += bs)
+ CAST_ecb_encrypt(data, res, &od->u.cast_key, CAST_DECRYPT);
+ return 0;
+}
+
+static int
+ossl_cast_cbc_encrypt(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_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;
+}
+
+/* AES */
+
+static int
+ossl_aes_init(PX_Cipher * c, const uint8 *key, unsigned klen, const uint8 *iv)
+{
+ ossldata *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;
+}
+
+static void
+ossl_aes_key_init(ossldata * od, int type)
+{
+ if (type == AES_ENCRYPT)
+ AES_set_encrypt_key(od->key, od->klen * 8, &od->u.aes_key);
+ else
+ AES_set_decrypt_key(od->key, od->klen * 8, &od->u.aes_key);
+ od->init = 1;
+}
+
+static int
+ossl_aes_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;
+
+ if (!od->init)
+ ossl_aes_key_init(od, AES_ENCRYPT);
+
+ for (; data <= end; data += bs, res += bs)
+ AES_ecb_encrypt(data, res, &od->u.aes_key, AES_ENCRYPT);
+ return 0;
+}
+
+static int
+ossl_aes_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;
+
+ if (!od->init)
+ ossl_aes_key_init(od, AES_DECRYPT);
+
+ for (; data <= end; data += bs, res += bs)
+ AES_ecb_encrypt(data, res, &od->u.aes_key, AES_DECRYPT);
+ return 0;
+}
+
+static int
+ossl_aes_cbc_encrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
+{
+ ossldata *od = c->ptr;
+
+ if (!od->init)
+ ossl_aes_key_init(od, AES_ENCRYPT);
+
+ AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_ENCRYPT);
+ return 0;
+}
+
+static int
+ossl_aes_cbc_decrypt(PX_Cipher * c, const uint8 *data, unsigned dlen,
+ uint8 *res)
+{
+ ossldata *od = c->ptr;
+
+ if (!od->init)
+ ossl_aes_key_init(od, AES_DECRYPT);
+
+ AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_DECRYPT);
return 0;
}
{"blowfish-cbc", "bf-cbc"},
{"blowfish-ecb", "bf-ecb"},
{"blowfish-cfb", "bf-cfb"},
- {"blowfish-ofb", "bf-ofb"},
+ {"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}
};
-/*
-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
+};
-/*
- * Special handlers
- */
-struct
-{
- char *name;
- PX_Cipher cf;
-} spec_types[] =
+static const struct ossl_cipher ossl_bf_ecb = {
+ bf_init, bf_ecb_encrypt, bf_ecb_decrypt,
+ 64 / 8, 448 / 8, 0
+};
-{
- {
- "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-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-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-ofb",
- {
- gen_evp_block_size, gen_evp_key_size, gen_evp_iv_size,
- bf_init, bf_ofb64_encrypt, bf_ofb64_decrypt, gen_evp_free
- }
- },
- {
- NULL
- }
+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_des3_ecb = {
+ ossl_des3_init, ossl_des3_ecb_encrypt, ossl_des3_ecb_decrypt,
+ 64 / 8, 192 / 8, 0
+};
+
+static const struct ossl_cipher ossl_des3_cbc = {
+ ossl_des3_init, ossl_des3_cbc_encrypt, ossl_des3_cbc_decrypt,
+ 64 / 8, 192 / 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
+};
+
+static const struct ossl_cipher ossl_aes_ecb = {
+ ossl_aes_init, ossl_aes_ecb_encrypt, ossl_aes_ecb_decrypt,
+ 128 / 8, 256 / 8, 0
+};
+
+static const struct ossl_cipher ossl_aes_cbc = {
+ ossl_aes_init, ossl_aes_cbc_encrypt, ossl_aes_cbc_decrypt,
+ 128 / 8, 256 / 8, 0
};
/*
- * Generic EVP_* functions handler
+ * Special handlers
*/
-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
+struct ossl_cipher_lookup
+{
+ const char *name;
+ const struct ossl_cipher *ciph;
};
-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); }
-*/
+static const struct ossl_cipher_lookup ossl_cipher_types[] = {
+ {"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}
+};
/* PUBLIC functions */
int
-px_find_digest(const char *name, PX_MD ** res)
+px_find_cipher(const char *name, PX_Cipher ** 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();
- }
+ const struct ossl_cipher_lookup *i;
+ PX_Cipher *c = NULL;
+ ossldata *od;
- md = EVP_get_digestbyname(name);
- if (md == NULL)
- return -1;
+ name = px_resolve_alias(ossl_aliases, name);
+ for (i = ossl_cipher_types; i->name; i++)
+ if (!strcmp(i->name, name))
+ break;
+ if (i->name == NULL)
+ return PXE_NO_CIPHER;
- ctx = px_alloc(sizeof(*ctx));
- EVP_DigestInit(ctx, md);
+ od = px_alloc(sizeof(*od));
+ memset(od, 0, sizeof(*od));
+ od->ciph = i->ciph;
- 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;
+ c = px_alloc(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 = od->ciph->encrypt;
+ c->decrypt = od->ciph->decrypt;
+ c->ptr = od;
- *res = h;
+ *res = c;
return 0;
}
-int
-px_find_cipher(const char *name, PX_Cipher ** res)
+static int openssl_random_init = 0;
+
+/*
+ * OpenSSL random should re-feeded occasionally. From /dev/urandom
+ * preferably.
+ */
+static void
+init_openssl_rand(void)
{
- unsigned i;
- PX_Cipher *c = NULL,
- *csrc;
- ossldata *od;
+ if (RAND_get_rand_method() == NULL)
+ RAND_set_rand_method(RAND_SSLeay());
+ openssl_random_init = 1;
+}
- const EVP_CIPHER *evp_c;
+int
+px_get_random_bytes(uint8 *dst, unsigned count)
+{
+ int res;
- if (!px_openssl_initialized)
- {
- px_openssl_initialized = 1;
- /* CRYPTO_set_mem_functions(o_alloc, o_realloc, o_free); */
- OpenSSL_add_all_algorithms();
- }
+ if (!openssl_random_init)
+ init_openssl_rand();
- name = px_resolve_alias(ossl_aliases, name);
- evp_c = EVP_get_cipherbyname(name);
- if (evp_c == NULL)
- return -1;
+ res = RAND_bytes(dst, count);
+ if (res == 1)
+ return count;
- od = px_alloc(sizeof(*od));
- memset(od, 0, sizeof(*od));
- od->evp_ciph = evp_c;
+ return PXE_OSSL_RAND_ERROR;
+}
- csrc = NULL;
+int
+px_get_pseudo_random_bytes(uint8 *dst, unsigned count)
+{
+ int res;
- for (i = 0; spec_types[i].name; i++)
- if (!strcmp(name, spec_types[i].name))
- {
- csrc = &spec_types[i].cf;
- break;
- }
+ if (!openssl_random_init)
+ init_openssl_rand();
- if (csrc == NULL)
- csrc = &gen_evp_handler;
+ res = RAND_pseudo_bytes(dst, count);
+ if (res == 0 || res == 1)
+ return count;
- c = px_alloc(sizeof(*c));
- memcpy(c, csrc, sizeof(*c));
- c->ptr = od;
+ return PXE_OSSL_RAND_ERROR;
+}
- *res = c;
+int
+px_add_entropy(const uint8 *data, unsigned count)
+{
+ /*
+ * estimate 0 bits
+ */
+ RAND_add(data, count, 0);
return 0;
}
projects / postgresql / blobdiff