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e_aes.c: fold even aesni_ccm_cipher.

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This commit is contained in:
Andy Polyakov 2011-10-24 06:00:06 +00:00
parent 507b0d9d38
commit f2784994ec
1 changed files with 12 additions and 66 deletions
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78
crypto/evp/e_aes.c
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@ -100,6 +100,7 @@ typedef struct
int len_set; /* Set if message length set */ int len_set; /* Set if message length set */
int L, M; /* L and M parameters from RFC3610 */ int L, M; /* L and M parameters from RFC3610 */
CCM128_CONTEXT ccm; CCM128_CONTEXT ccm;
ccm128_f str;
} EVP_AES_CCM_CTX; } EVP_AES_CCM_CTX;
#define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4)) #define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4))
@ -397,6 +398,8 @@ static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
&cctx->ks, (block128_f)aesni_encrypt); &cctx->ks, (block128_f)aesni_encrypt);
cctx->str = enc?(ccm128_f)aesni_ccm64_encrypt_blocks :
(ccm128_f)aesni_ccm64_decrypt_blocks;
cctx->key_set = 1; cctx->key_set = 1;
} }
if (iv) if (iv)
@ -407,71 +410,9 @@ static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
return 1; return 1;
} }
#define aesni_ccm_cipher aes_ccm_cipher
static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len) const unsigned char *in, size_t len);
{
EVP_AES_CCM_CTX *cctx = ctx->cipher_data;
CCM128_CONTEXT *ccm = &cctx->ccm;
/* If not set up, return error */
if (!cctx->iv_set && !cctx->key_set)
return -1;
if (!ctx->encrypt && !cctx->tag_set)
return -1;
if (!out)
{
if (!in)
{
if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len))
return -1;
cctx->len_set = 1;
return len;
}
/* If have AAD need message length */
if (!cctx->len_set && len)
return -1;
CRYPTO_ccm128_aad(ccm, in, len);
return len;
}
/* EVP_*Final() doesn't return any data */
if (!in)
return 0;
/* If not set length yet do it */
if (!cctx->len_set)
{
if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
return -1;
cctx->len_set = 1;
}
if (ctx->encrypt)
{
if (CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
aesni_ccm64_encrypt_blocks))
return -1;
cctx->tag_set = 1;
return len;
}
else
{
int rv = -1;
if (!CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
aesni_ccm64_decrypt_blocks))
{
unsigned char tag[16];
if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))
{
if (!memcmp(tag, ctx->buf, cctx->M))
rv = len;
}
}
if (rv == -1)
OPENSSL_cleanse(out, len);
cctx->iv_set = 0;
cctx->tag_set = 0;
cctx->len_set = 0;
return rv;
}
}
#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ #define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \
static const EVP_CIPHER aesni_##keylen##_##mode = { \ static const EVP_CIPHER aesni_##keylen##_##mode = { \
@ -1262,6 +1203,7 @@ static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks);
CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
&cctx->ks, (block128_f)AES_encrypt); &cctx->ks, (block128_f)AES_encrypt);
cctx->str = NULL;
cctx->key_set = 1; cctx->key_set = 1;
} while (0); } while (0);
if (iv) if (iv)
@ -1309,7 +1251,9 @@ static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
} }
if (ctx->encrypt) if (ctx->encrypt)
{ {
if (CRYPTO_ccm128_encrypt(ccm, in, out, len)) if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len,
cctx->str) :
CRYPTO_ccm128_encrypt(ccm, in, out, len))
return -1; return -1;
cctx->tag_set = 1; cctx->tag_set = 1;
return len; return len;
@ -1317,7 +1261,9 @@ static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
else else
{ {
int rv = -1; int rv = -1;
if (!CRYPTO_ccm128_decrypt(ccm, in, out, len)) if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
cctx->str) :
!CRYPTO_ccm128_decrypt(ccm, in, out, len))
{ {
unsigned char tag[16]; unsigned char tag[16];
if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) if (CRYPTO_ccm128_tag(ccm, tag, cctx->M))