*
*/
+#define OPENSSL_FIPSAPI
+
+#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_AES
#include <openssl/evp.h>
#include <openssl/err.h>
#include <string.h>
#include <assert.h>
-#include <openssl/rijndael.h>
+#include <openssl/aes.h>
+#include "evp_locl.h"
+#include <openssl/modes.h>
+#include <openssl/rand.h>
-static int aes_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
-static int aes_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl);
-static int aes_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl);
-
-#define IMPLEMENT_AES_CIPHER(name, ciph_func, keylen, ivlen, mode) \
-static const EVP_CIPHER name##_cipher_st = \
- { \
- NID_##name, \
- 16,keylen,ivlen, \
- mode, \
- aes_init, \
- ciph_func, \
- NULL, \
- sizeof(RIJNDAEL_KEY), \
- EVP_CIPHER_set_asn1_iv, \
- EVP_CIPHER_get_asn1_iv, \
- NULL, \
- NULL \
- }; \
-const EVP_CIPHER * EVP_##name(void) \
- { \
- return &name##_cipher_st; \
- }
-IMPLEMENT_AES_CIPHER(aes_128_ecb, aes_ecb, 16, 0, EVP_CIPH_ECB_MODE)
-IMPLEMENT_AES_CIPHER(aes_192_ecb, aes_ecb, 24, 0, EVP_CIPH_ECB_MODE)
-IMPLEMENT_AES_CIPHER(aes_256_ecb, aes_ecb, 32, 0, EVP_CIPH_ECB_MODE)
+typedef struct
+ {
+ AES_KEY ks;
+ } EVP_AES_KEY;
+
+#define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx)
+
+IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
+ NID_aes_128, 16, 16, 16, 128,
+ EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
+ aes_init_key, NULL, NULL, NULL, NULL)
+IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY,
+ NID_aes_192, 16, 24, 16, 128,
+ EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
+ aes_init_key, NULL, NULL, NULL, NULL)
+IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY,
+ NID_aes_256, 16, 32, 16, 128,
+ EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1,
+ aes_init_key, NULL, NULL, NULL, NULL)
+
+#define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16,EVP_CIPH_FLAG_FIPS)
+
+IMPLEMENT_AES_CFBR(128,1)
+IMPLEMENT_AES_CFBR(192,1)
+IMPLEMENT_AES_CFBR(256,1)
+
+IMPLEMENT_AES_CFBR(128,8)
+IMPLEMENT_AES_CFBR(192,8)
+IMPLEMENT_AES_CFBR(256,8)
+
+static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t len)
+{
+ unsigned int num;
+ num = ctx->num;
+#ifdef AES_CTR_ASM
+ void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out,
+ size_t blocks, const AES_KEY *key,
+ const unsigned char ivec[AES_BLOCK_SIZE]);
+
+ CRYPTO_ctr128_encrypt_ctr32(in,out,len,
+ &((EVP_AES_KEY *)ctx->cipher_data)->ks,
+ ctx->iv,ctx->buf,&num,(ctr128_f)AES_ctr32_encrypt);
+#else
+ CRYPTO_ctr128_encrypt(in,out,len,
+ &((EVP_AES_KEY *)ctx->cipher_data)->ks,
+ ctx->iv,ctx->buf,&num,(block128_f)AES_encrypt);
+#endif
+ ctx->num = (size_t)num;
+ return 1;
+}
+
+static const EVP_CIPHER aes_128_ctr_cipher=
+ {
+ NID_aes_128_ctr,1,16,16,
+ EVP_CIPH_CTR_MODE,
+ aes_init_key,
+ aes_counter,
+ NULL,
+ sizeof(EVP_AES_KEY),
+ NULL,
+ NULL,
+ NULL,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_aes_128_ctr (void)
+{ return &aes_128_ctr_cipher; }
+
+static const EVP_CIPHER aes_192_ctr_cipher=
+ {
+ NID_aes_192_ctr,1,24,16,
+ EVP_CIPH_CTR_MODE,
+ aes_init_key,
+ aes_counter,
+ NULL,
+ sizeof(EVP_AES_KEY),
+ NULL,
+ NULL,
+ NULL,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_aes_192_ctr (void)
+{ return &aes_192_ctr_cipher; }
+
+static const EVP_CIPHER aes_256_ctr_cipher=
+ {
+ NID_aes_256_ctr,1,32,16,
+ EVP_CIPH_CTR_MODE,
+ aes_init_key,
+ aes_counter,
+ NULL,
+ sizeof(EVP_AES_KEY),
+ NULL,
+ NULL,
+ NULL,
+ NULL
+ };
-IMPLEMENT_AES_CIPHER(aes_128_cbc, aes_cbc, 16, 16, EVP_CIPH_CBC_MODE)
-IMPLEMENT_AES_CIPHER(aes_192_cbc, aes_cbc, 24, 16, EVP_CIPH_CBC_MODE)
-IMPLEMENT_AES_CIPHER(aes_256_cbc, aes_cbc, 32, 16, EVP_CIPH_CBC_MODE)
+const EVP_CIPHER *EVP_aes_256_ctr (void)
+{ return &aes_256_ctr_cipher; }
-static int aes_init(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc)
{
- RIJNDAEL_KEY *k=ctx->cipher_data;
- if (enc)
- k->rounds = rijndaelKeySetupEnc(k->rd_key, key, ctx->key_len * 8);
+ int ret;
+
+ if (((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_ECB_MODE
+ || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CBC_MODE)
+ && !enc)
+ ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
else
- k->rounds = rijndaelKeySetupDec(k->rd_key, key, ctx->key_len * 8);
+ ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
+
+ if(ret < 0)
+ {
+ EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED);
+ return 0;
+ }
return 1;
}
-static int aes_ecb(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
+typedef struct
{
- RIJNDAEL_KEY *k=ctx->cipher_data;
- while(inl > 0)
+ /* AES key schedule to use */
+ AES_KEY ks;
+ /* Set if key initialised */
+ int key_set;
+ /* Set if an iv is set */
+ int iv_set;
+ /* Pointer to GCM128_CTX: FIXME actual structure later */
+ GCM128_CONTEXT *gcm;
+ /* Temporary IV store */
+ unsigned char *iv;
+ /* IV length */
+ int ivlen;
+ /* Tag to verify */
+ unsigned char tag[16];
+ int taglen;
+ /* It is OK to generate IVs */
+ int iv_gen;
+ } EVP_AES_GCM_CTX;
+
+static int aes_gcm_cleanup(EVP_CIPHER_CTX *c)
+ {
+ EVP_AES_GCM_CTX *gctx = c->cipher_data;
+ if (gctx->gcm)
+ CRYPTO_gcm128_release(gctx->gcm);
+ if (gctx->iv != c->iv)
+ OPENSSL_free(gctx->iv);
+ return 1;
+ }
+
+/* increment counter (64-bit int) by 1 */
+static void ctr64_inc(unsigned char *counter) {
+ int n=8;
+ unsigned char c;
+
+ do {
+ --n;
+ c = counter[n];
+ ++c;
+ counter[n] = c;
+ if (c) return;
+ } while (n);
+}
+
+static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
+ {
+ EVP_AES_GCM_CTX *gctx = c->cipher_data;
+ switch (type)
{
- if(ctx->encrypt)
- rijndaelEncrypt(k->rd_key,k->rounds, in, out);
- else
- rijndaelDecrypt(k->rd_key,k->rounds, in, out);
- inl-=16;
- in+=16;
- out+=16;
+ case EVP_CTRL_INIT:
+ gctx->gcm = NULL;
+ gctx->key_set = 0;
+ gctx->iv_set = 0;
+ gctx->ivlen = c->cipher->iv_len;
+ gctx->iv = c->iv;
+ gctx->taglen = -1;
+ gctx->iv_gen = 0;
+ return 1;
+
+ case EVP_CTRL_GCM_SET_IVLEN:
+ if (arg <= 0)
+ return 0;
+#ifdef OPENSSL_FIPS
+ if (FIPS_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)
+ && arg < 12)
+ return 0;
+#endif
+ /* Allocate memory for IV if needed */
+ if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen))
+ {
+ if (gctx->iv != c->iv)
+ OPENSSL_free(gctx->iv);
+ gctx->iv = OPENSSL_malloc(arg);
+ if (!gctx->iv)
+ return 0;
+ }
+ gctx->ivlen = arg;
+ return 1;
+
+ case EVP_CTRL_GCM_SET_TAG:
+ if (arg <= 0 || arg > 16 || c->encrypt)
+ return 0;
+ memcpy(gctx->tag, ptr, arg);
+ gctx->taglen = arg;
+ return 1;
+
+ case EVP_CTRL_GCM_GET_TAG:
+ if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0)
+ return 0;
+ memcpy(ptr, gctx->tag, arg);
+ return 1;
+
+ case EVP_CTRL_GCM_SET_IV_FIXED:
+ /* Special case: -1 length restores whole IV */
+ if (arg == -1)
+ {
+ memcpy(gctx->iv, ptr, gctx->ivlen);
+ gctx->iv_gen = 1;
+ return 1;
+ }
+ /* Fixed field must be at least 4 bytes and invocation field
+ * at least 8.
+ */
+ if ((arg < 4) || (gctx->ivlen - arg) < 8)
+ return 0;
+ if (arg)
+ memcpy(gctx->iv, ptr, arg);
+ if (RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
+ return 0;
+ gctx->iv_gen = 1;
+ return 1;
+
+ case EVP_CTRL_GCM_IV_GEN:
+ if (gctx->iv_gen == 0 || gctx->key_set == 0)
+ return 0;
+ CRYPTO_gcm128_setiv(gctx->gcm, gctx->iv, gctx->ivlen);
+ memcpy(ptr, gctx->iv, gctx->ivlen);
+ /* Invocation field will be at least 8 bytes in size and
+ * so no need to check wrap around or increment more than
+ * last 8 bytes.
+ */
+ ctr64_inc(gctx->iv + gctx->ivlen - 8);
+ gctx->iv_set = 1;
+ return 1;
+
+ default:
+ return -1;
+
}
- assert(inl == 0);
+ }
+static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+ {
+ EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
+ if (!iv && !key)
+ return 1;
+ if (key)
+ {
+ AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks);
+ if (!gctx->gcm)
+ {
+ gctx->gcm =
+ CRYPTO_gcm128_new(&gctx->ks, (block128_f)AES_encrypt);
+ if (!gctx->gcm)
+ return 0;
+ }
+ else
+ CRYPTO_gcm128_init(gctx->gcm, &gctx->ks, (block128_f)AES_encrypt);
+ /* If we have an iv can set it directly, otherwise use
+ * saved IV.
+ */
+ if (iv == NULL && gctx->iv_set)
+ iv = gctx->iv;
+ if (iv)
+ {
+ CRYPTO_gcm128_setiv(gctx->gcm, iv, gctx->ivlen);
+ gctx->iv_set = 1;
+ }
+ gctx->key_set = 1;
+ }
+ else
+ {
+ /* If key set use IV, otherwise copy */
+ if (gctx->key_set)
+ CRYPTO_gcm128_setiv(gctx->gcm, iv, gctx->ivlen);
+ else
+ memcpy(gctx->iv, iv, gctx->ivlen);
+ gctx->iv_set = 1;
+ gctx->iv_gen = 0;
+ }
return 1;
}
-static int aes_cbc(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, unsigned int inl)
+static int aes_gcm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t len)
{
- int n;
- unsigned char tmp[16];
- RIJNDAEL_KEY *k=ctx->cipher_data;
- while(inl > 0)
+ EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
+ /* If not set up, return error */
+ if (!gctx->iv_set && !gctx->key_set)
+ return -1;
+ if (!ctx->encrypt && gctx->taglen < 0)
+ return -1;
+ if (in)
{
- if(ctx->encrypt)
+ if (out == NULL)
+ {
+ if (CRYPTO_gcm128_aad(gctx->gcm, in, len))
+ return -1;
+ }
+ else if (ctx->encrypt)
{
- for(n=0 ; n < 16 ; n++)
- tmp[n] = in[n] ^ ctx->iv[n];
- rijndaelEncrypt(k->rd_key,k->rounds, tmp, out);
- memcpy(ctx->iv,out,16);
+ if (CRYPTO_gcm128_encrypt(gctx->gcm, in, out, len))
+ return -1;
}
else
{
- memcpy(tmp, in, 16);
- rijndaelDecrypt(k->rd_key,k->rounds, in, out);
- for(n=0 ; n < 16 ; n++)
- out[n] ^= ctx->iv[n];
- memcpy(ctx->iv,tmp,16);
+ if (CRYPTO_gcm128_decrypt(gctx->gcm, in, out, len))
+ return -1;
}
- inl-=16;
- in+=16;
- out+=16;
+ return len;
}
- assert(inl == 0);
- return 1;
+ else
+ {
+ if (!ctx->encrypt)
+ {
+ if (CRYPTO_gcm128_finish(gctx->gcm,
+ gctx->tag, gctx->taglen) != 0)
+ return -1;
+ gctx->iv_set = 0;
+ return 0;
+ }
+ CRYPTO_gcm128_tag(gctx->gcm, gctx->tag, 16);
+ gctx->taglen = 16;
+ /* Don't reuse the IV */
+ gctx->iv_set = 0;
+ return 0;
+ }
+
}
+
+static const EVP_CIPHER aes_128_gcm_cipher=
+ {
+ NID_aes_128_gcm,1,16,12,
+ EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+ | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+ | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+ aes_gcm_init_key,
+ aes_gcm,
+ aes_gcm_cleanup,
+ sizeof(EVP_AES_GCM_CTX),
+ NULL,
+ NULL,
+ aes_gcm_ctrl,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_aes_128_gcm (void)
+{ return &aes_128_gcm_cipher; }
+
+static const EVP_CIPHER aes_192_gcm_cipher=
+ {
+ NID_aes_128_gcm,1,24,12,
+ EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+ | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+ | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+ aes_gcm_init_key,
+ aes_gcm,
+ aes_gcm_cleanup,
+ sizeof(EVP_AES_GCM_CTX),
+ NULL,
+ NULL,
+ aes_gcm_ctrl,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_aes_192_gcm (void)
+{ return &aes_192_gcm_cipher; }
+
+static const EVP_CIPHER aes_256_gcm_cipher=
+ {
+ NID_aes_128_gcm,1,32,12,
+ EVP_CIPH_GCM_MODE|EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_DEFAULT_ASN1
+ | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER
+ | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT,
+ aes_gcm_init_key,
+ aes_gcm,
+ aes_gcm_cleanup,
+ sizeof(EVP_AES_GCM_CTX),
+ NULL,
+ NULL,
+ aes_gcm_ctrl,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_aes_256_gcm (void)
+{ return &aes_256_gcm_cipher; }
+
#endif
projects / openssl.git / blobdiff