#include "px.h"
#include <openssl/evp.h>
-#include <openssl/blowfish.h>
-#include <openssl/cast.h>
-#include <openssl/des.h>
-#include <openssl/aes.h>
-#include <openssl/rand.h>
#include <openssl/err.h>
+#include <openssl/rand.h>
#include "utils/memutils.h"
#include "utils/resowner.h"
/*
* 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.
+ * We use OpenSSL's EVP* family of functions for these.
+ */
+
+/*
+ * prototype for the EVP functions that return an algorithm, e.g.
+ * EVP_aes_128_cbc().
*/
+typedef const EVP_CIPHER *(*ossl_EVP_cipher_func)(void);
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);
-
+ ossl_EVP_cipher_func cipher_func;
int block_size;
int max_key_size;
- int stream_cipher;
};
typedef struct
{
- union
- {
- struct
- {
- BF_KEY key;
- int num;
- } bf;
- struct
- {
- DES_key_schedule key_schedule;
- } des;
- struct
- {
- DES_key_schedule k1,
- k2,
- k3;
- } des3;
- CAST_KEY cast_key;
- AES_KEY aes_key;
- } u;
+ EVP_CIPHER_CTX evp_ctx;
+ const EVP_CIPHER *evp_ciph;
uint8 key[MAX_KEY];
uint8 iv[MAX_IV];
unsigned klen;
const struct ossl_cipher *ciph;
} ossldata;
-/* generic */
+/* Common routines for all algorithms */
static unsigned
gen_ossl_block_size(PX_Cipher *c)
{
ossldata *od = (ossldata *) c->ptr;
+ EVP_CIPHER_CTX_cleanup(&od->evp_ctx);
px_memset(od, 0, sizeof(*od));
px_free(od);
px_free(c);
}
+static int
+gen_ossl_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
+ uint8 *res)
+{
+ ossldata *od = c->ptr;
+ int outlen;
+
+ if (!od->init)
+ {
+ EVP_CIPHER_CTX_init(&od->evp_ctx);
+ if (!EVP_DecryptInit_ex(&od->evp_ctx, od->evp_ciph, NULL, NULL, NULL))
+ 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;
+
+ return 0;
+}
+
+static int
+gen_ossl_encrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
+ uint8 *res)
+{
+ ossldata *od = c->ptr;
+ int outlen;
+
+ if (!od->init)
+ {
+ EVP_CIPHER_CTX_init(&od->evp_ctx);
+ if (!EVP_EncryptInit_ex(&od->evp_ctx, od->evp_ciph, NULL, NULL, NULL))
+ 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_ERR_GENERIC;
+
+ return 0;
+}
+
/* Blowfish */
/*
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};
- static uint8 out[8];
-
- BF_KEY bf_key;
+ uint8 out[8];
+ EVP_CIPHER_CTX evp_ctx;
+ int outlen;
/* encrypt with 448bits key and verify output */
- BF_set_key(&bf_key, 56, key);
- BF_ecb_encrypt(data, out, &bf_key, BF_ENCRYPT);
+ EVP_CIPHER_CTX_init(&evp_ctx);
+ if (!EVP_EncryptInit_ex(&evp_ctx, EVP_bf_ecb(), NULL, NULL, NULL))
+ return 0;
+ if (!EVP_CIPHER_CTX_set_key_length(&evp_ctx, 56))
+ return 0;
+ if (!EVP_EncryptInit_ex(&evp_ctx, NULL, NULL, key, NULL))
+ return 0;
+
+ if (!EVP_EncryptUpdate(&evp_ctx, out, &outlen, data, 8))
+ return 0;
if (memcmp(out, res, 8) != 0)
return 0; /* Output does not match -> strong cipher is
bf_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
{
ossldata *od = c->ptr;
+ unsigned bs = gen_ossl_block_size(c);
static int bf_is_strong = -1;
/*
return PXE_KEY_TOO_BIG;
/* Key len is supported. We can use it. */
- BF_set_key(&od->u.bf.key, klen, key);
+ od->klen = klen;
+ memcpy(od->key, key, klen);
+
if (iv)
- memcpy(od->iv, iv, BF_BLOCK);
+ memcpy(od->iv, iv, bs);
else
- memset(od->iv, 0, BF_BLOCK);
- od->u.bf.num = 0;
- return 0;
-}
-
-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;
-
- 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
-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;
-
- 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
-bf_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);
- return 0;
-}
-
-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_cfb64_encrypt(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_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);
+ memset(od->iv, 0, bs);
return 0;
}
ossl_des_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
{
ossldata *od = c->ptr;
- DES_cblock xkey;
+ unsigned bs = gen_ossl_block_size(c);
- 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));
+ od->klen = 8;
+ memset(od->key, 0, 8);
+ memcpy(od->key, key, klen > 8 ? 8 : klen);
if (iv)
- memcpy(od->iv, iv, 8);
+ memcpy(od->iv, iv, bs);
else
- memset(od->iv, 0, 8);
- return 0;
-}
-
-static int
-ossl_des_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_ecb_encrypt((DES_cblock *) (data + i * bs),
- (DES_cblock *) (res + i * bs),
- &od->u.des.key_schedule, 1);
- return 0;
-}
-
-static int
-ossl_des_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;
-
- for (i = 0; i < dlen / bs; i++)
- DES_ecb_encrypt((DES_cblock *) (data + i * bs),
- (DES_cblock *) (res + i * bs),
- &od->u.des.key_schedule, 0);
- return 0;
-}
-
-static int
-ossl_des_cbc_encrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
- uint8 *res)
-{
- ossldata *od = c->ptr;
-
- DES_ncbc_encrypt(data, res, dlen, &od->u.des.key_schedule,
- (DES_cblock *) od->iv, 1);
- return 0;
-}
-
-static int
-ossl_des_cbc_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
- uint8 *res)
-{
- ossldata *od = c->ptr;
-
- DES_ncbc_encrypt(data, res, dlen, &od->u.des.key_schedule,
- (DES_cblock *) od->iv, 0);
+ memset(od->iv, 0, bs);
return 0;
}
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));
-
- if (iv)
- memcpy(od->iv, iv, 8);
- else
- memset(od->iv, 0, 8);
- return 0;
-}
-
-static int
-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;
- 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;
-}
+ od->klen = 24;
+ memset(od->key, 0, 24);
+ memcpy(od->key, key, klen > 24 ? 24 : klen);
-static int
-ossl_des3_cbc_encrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
- uint8 *res)
-{
- ossldata *od = c->ptr;
-
- 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
-ossl_des3_cbc_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
- uint8 *res)
-{
- ossldata *od = c->ptr;
-
- DES_ede3_cbc_encrypt(data, res, dlen,
- &od->u.des3.k1, &od->u.des3.k2, &od->u.des3.k3,
- (DES_cblock *) od->iv, 0);
+ if (iv)
+ memcpy(od->iv, iv, bs);
+ else
+ memset(od->iv, 0, bs);
return 0;
}
ossldata *od = c->ptr;
unsigned bs = gen_ossl_block_size(c);
- CAST_set_key(&od->u.cast_key, klen, key);
+ od->klen = klen;
+ memcpy(od->key, key, klen);
+
if (iv)
memcpy(od->iv, iv, bs);
else
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
memcpy(od->iv, iv, bs);
else
memset(od->iv, 0, bs);
+
return 0;
}
static int
-ossl_aes_key_init(ossldata *od, int type)
+ossl_aes_ecb_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
{
+ ossldata *od = c->ptr;
int err;
- /*
- * Strong key support could be missing on some openssl installations. We
- * must check return value from set key function.
- */
- if (type == AES_ENCRYPT)
- err = AES_set_encrypt_key(od->key, od->klen * 8, &od->u.aes_key);
- else
- err = AES_set_decrypt_key(od->key, od->klen * 8, &od->u.aes_key);
+ err = ossl_aes_init(c, key, klen, iv);
+ if (err)
+ return err;
- if (err == 0)
+ switch (od->klen)
{
- od->init = 1;
- return 0;
+ 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;
}
- od->init = 0;
- return PXE_KEY_TOO_BIG;
-}
-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;
- int err;
-
- if (!od->init)
- if ((err = ossl_aes_key_init(od, AES_ENCRYPT)) != 0)
- return err;
-
- for (; data <= end; data += bs, res += bs)
- AES_ecb_encrypt(data, res, &od->u.aes_key, AES_ENCRYPT);
- return 0;
+ return err;
}
static int
-ossl_aes_ecb_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
- uint8 *res)
+ossl_aes_cbc_init(PX_Cipher *c, const uint8 *key, unsigned klen, const uint8 *iv)
{
- unsigned bs = gen_ossl_block_size(c);
ossldata *od = c->ptr;
- const uint8 *end = data + dlen - bs;
int err;
- if (!od->init)
- if ((err = ossl_aes_key_init(od, AES_DECRYPT)) != 0)
- return err;
-
- 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;
- int err;
-
- if (!od->init)
- if ((err = ossl_aes_key_init(od, AES_ENCRYPT)) != 0)
- return err;
-
- AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_ENCRYPT);
- return 0;
-}
+ err = ossl_aes_init(c, key, klen, iv);
+ if (err)
+ return err;
-static int
-ossl_aes_cbc_decrypt(PX_Cipher *c, const uint8 *data, unsigned dlen,
- uint8 *res)
-{
- ossldata *od = c->ptr;
- int err;
-
- if (!od->init)
- if ((err = ossl_aes_key_init(od, AES_DECRYPT)) != 0)
- 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;
+ }
- AES_cbc_encrypt(data, res, dlen, &od->u.aes_key, od->iv, AES_DECRYPT);
- return 0;
+ return err;
}
/*
};
static const struct ossl_cipher ossl_bf_cbc = {
- bf_init, bf_cbc_encrypt, bf_cbc_decrypt,
- 64 / 8, 448 / 8, 0
+ bf_init,
+ EVP_bf_cbc,
+ 64 / 8, 448 / 8
};
static const struct ossl_cipher ossl_bf_ecb = {
- bf_init, bf_ecb_encrypt, bf_ecb_decrypt,
- 64 / 8, 448 / 8, 0
+ bf_init,
+ EVP_bf_ecb,
+ 64 / 8, 448 / 8
};
static const struct ossl_cipher ossl_bf_cfb = {
- bf_init, bf_cfb64_encrypt, bf_cfb64_decrypt,
- 64 / 8, 448 / 8, 1
+ bf_init,
+ EVP_bf_cfb,
+ 64 / 8, 448 / 8
};
static const struct ossl_cipher ossl_des_ecb = {
- ossl_des_init, ossl_des_ecb_encrypt, ossl_des_ecb_decrypt,
- 64 / 8, 64 / 8, 0
+ ossl_des_init,
+ EVP_des_ecb,
+ 64 / 8, 64 / 8
};
static const struct ossl_cipher ossl_des_cbc = {
- ossl_des_init, ossl_des_cbc_encrypt, ossl_des_cbc_decrypt,
- 64 / 8, 64 / 8, 0
+ ossl_des_init,
+ EVP_des_cbc,
+ 64 / 8, 64 / 8
};
static const struct ossl_cipher ossl_des3_ecb = {
- ossl_des3_init, ossl_des3_ecb_encrypt, ossl_des3_ecb_decrypt,
- 64 / 8, 192 / 8, 0
+ ossl_des3_init,
+ EVP_des_ede3_ecb,
+ 64 / 8, 192 / 8
};
static const struct ossl_cipher ossl_des3_cbc = {
- ossl_des3_init, ossl_des3_cbc_encrypt, ossl_des3_cbc_decrypt,
- 64 / 8, 192 / 8, 0
+ ossl_des3_init,
+ EVP_des_ede3_cbc,
+ 64 / 8, 192 / 8
};
static const struct ossl_cipher ossl_cast_ecb = {
- ossl_cast_init, ossl_cast_ecb_encrypt, ossl_cast_ecb_decrypt,
- 64 / 8, 128 / 8, 0
+ ossl_cast_init,
+ EVP_cast5_ecb,
+ 64 / 8, 128 / 8
};
static const struct ossl_cipher ossl_cast_cbc = {
- ossl_cast_init, ossl_cast_cbc_encrypt, ossl_cast_cbc_decrypt,
- 64 / 8, 128 / 8, 0
+ ossl_cast_init,
+ EVP_cast5_cbc,
+ 64 / 8, 128 / 8
};
static const struct ossl_cipher ossl_aes_ecb = {
- ossl_aes_init, ossl_aes_ecb_encrypt, ossl_aes_ecb_decrypt,
- 128 / 8, 256 / 8, 0
+ ossl_aes_ecb_init,
+ NULL, /* EVP_aes_XXX_ecb(), determined in init function */
+ 128 / 8, 256 / 8
};
static const struct ossl_cipher ossl_aes_cbc = {
- ossl_aes_init, ossl_aes_cbc_encrypt, ossl_aes_cbc_decrypt,
- 128 / 8, 256 / 8, 0
+ ossl_aes_cbc_init,
+ NULL, /* EVP_aes_XXX_cbc(), determined in init function */
+ 128 / 8, 256 / 8
};
/*
memset(od, 0, sizeof(*od));
od->ciph = i->ciph;
+ if (i->ciph->cipher_func)
+ od->evp_ciph = i->ciph->cipher_func();
+
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->encrypt = gen_ossl_encrypt;
+ c->decrypt = gen_ossl_decrypt;
c->ptr = od;
*res = c;
projects / postgresql.git / commitdiff