*
*/
+#define OPENSSL_FIPSAPI
+
#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_AES
#include <openssl/evp.h>
#include <assert.h>
#include <openssl/aes.h>
#include "evp_locl.h"
+#include <openssl/modes.h>
+#include <openssl/rand.h>
static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
const unsigned char *iv, int enc);
IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY,
NID_aes_128, 16, 16, 16, 128,
- 0, aes_init_key, NULL,
- EVP_CIPHER_set_asn1_iv,
- EVP_CIPHER_get_asn1_iv,
- NULL)
+ 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,
- 0, aes_init_key, NULL,
- EVP_CIPHER_set_asn1_iv,
- EVP_CIPHER_get_asn1_iv,
- NULL)
+ 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,
- 0, aes_init_key, NULL,
- EVP_CIPHER_set_asn1_iv,
- EVP_CIPHER_get_asn1_iv,
- NULL)
+ 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)
+#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)
static int aes_counter (EVP_CIPHER_CTX *ctx, unsigned char *out,
const unsigned char *in, size_t len)
{
- AES_ctr128_encrypt (in,out,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,&ctx->num);
+ 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_VARIABLE_LENGTH|EVP_CIPH_CUSTOM_IV,
+ EVP_CIPH_CTR_MODE,
aes_init_key,
aes_counter,
NULL,
static const EVP_CIPHER aes_192_ctr_cipher=
{
NID_aes_192_ctr,1,24,16,
- EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_CUSTOM_IV,
+ EVP_CIPH_CTR_MODE,
aes_init_key,
aes_counter,
NULL,
static const EVP_CIPHER aes_256_ctr_cipher=
{
NID_aes_256_ctr,1,32,16,
- EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_CUSTOM_IV,
+ EVP_CIPH_CTR_MODE,
aes_init_key,
aes_counter,
NULL,
return 0;
}
- if (ctx->cipher->flags&EVP_CIPH_CUSTOM_IV)
+ return 1;
+ }
+
+typedef struct
+ {
+ /* 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 (iv!=NULL)
- memcpy (ctx->iv,iv,ctx->cipher->iv_len);
- else {
- EVPerr(EVP_F_AES_INIT_KEY,EVP_R_AES_IV_SETUP_FAILED);
+ 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;
+
}
+ }
+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_gcm(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t len)
+ {
+ 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 (out == NULL)
+ {
+ if (CRYPTO_gcm128_aad(gctx->gcm, in, len))
+ return -1;
+ }
+ else if (ctx->encrypt)
+ {
+ if (CRYPTO_gcm128_encrypt(gctx->gcm, in, out, len))
+ return -1;
+ }
+ else
+ {
+ if (CRYPTO_gcm128_decrypt(gctx->gcm, in, out, len))
+ return -1;
+ }
+ return len;
+ }
+ 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