|
- /* ====================================================================
- * Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ==================================================================== */
-
- #include <openssl/aead.h>
- #include <openssl/aes.h>
- #include <openssl/cipher.h>
- #include <openssl/cpu.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
- #include <openssl/modes.h>
- #include <openssl/obj.h>
- #include <openssl/rand.h>
-
- #include "internal.h"
- #include "../modes/internal.h"
-
-
- typedef struct {
- union {
- double align;
- AES_KEY ks;
- } ks;
- block128_f block;
- union {
- cbc128_f cbc;
- ctr128_f ctr;
- } stream;
- } EVP_AES_KEY;
-
- typedef struct {
- union {
- double align;
- AES_KEY ks;
- } ks; /* AES key schedule to use */
- int key_set; /* Set if key initialised */
- int iv_set; /* Set if an iv is set */
- GCM128_CONTEXT gcm;
- uint8_t *iv; /* Temporary IV store */
- int ivlen; /* IV length */
- int taglen;
- int iv_gen; /* It is OK to generate IVs */
- ctr128_f ctr;
- } EVP_AES_GCM_CTX;
-
- #if !defined(OPENSSL_NO_ASM) && \
- (defined(OPENSSL_X86_64) || defined(OPENSSL_X86))
- #define VPAES
- extern unsigned int OPENSSL_ia32cap_P[];
-
- static char vpaes_capable() {
- return (OPENSSL_ia32cap_P[1] & (1 << (41 - 32))) != 0;
- }
-
- #if defined(OPENSSL_X86_64)
- #define BSAES
- static char bsaes_capable() {
- return vpaes_capable();
- }
- #endif
-
- #elif !defined(OPENSSL_NO_ASM) && defined(OPENSSL_ARM)
- #include "../arm_arch.h"
- #if __ARM_ARCH__ >= 7
- #define BSAES
- static char bsaes_capable() {
- return CRYPTO_is_NEON_capable();
- }
- #endif /* __ARM_ARCH__ >= 7 */
- #endif /* OPENSSL_ARM */
-
- #if defined(BSAES)
- /* On platforms where BSAES gets defined (just above), then these functions are
- * provided by asm. */
- void bsaes_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
- const AES_KEY *key, uint8_t ivec[16], int enc);
- void bsaes_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t len,
- const AES_KEY *key, const uint8_t ivec[16]);
- #else
- static char bsaes_capable() {
- return 0;
- }
-
- /* On other platforms, bsaes_capable() will always return false and so the
- * following will never be called. */
- void bsaes_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
- const AES_KEY *key, uint8_t ivec[16], int enc) {
- abort();
- }
-
- void bsaes_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t len,
- const AES_KEY *key, const uint8_t ivec[16]) {
- abort();
- }
- #endif
-
- #if defined(VPAES)
- /* On platforms where VPAES gets defined (just above), then these functions are
- * provided by asm. */
- int vpaes_set_encrypt_key(const uint8_t *userKey, int bits, AES_KEY *key);
- int vpaes_set_decrypt_key(const uint8_t *userKey, int bits, AES_KEY *key);
-
- void vpaes_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
- void vpaes_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
-
- void vpaes_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
- const AES_KEY *key, uint8_t *ivec, int enc);
- #else
- static char vpaes_capable() {
- return 0;
- }
-
- /* On other platforms, vpaes_capable() will always return false and so the
- * following will never be called. */
- int vpaes_set_encrypt_key(const uint8_t *userKey, int bits, AES_KEY *key) {
- abort();
- }
- int vpaes_set_decrypt_key(const uint8_t *userKey, int bits, AES_KEY *key) {
- abort();
- }
- void vpaes_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key) {
- abort();
- }
- void vpaes_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key) {
- abort();
- }
- void vpaes_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
- const AES_KEY *key, uint8_t *ivec, int enc) {
- abort();
- }
- #endif
-
- #if !defined(OPENSSL_NO_ASM) && \
- (defined(OPENSSL_X86_64) || defined(OPENSSL_X86))
- int aesni_set_encrypt_key(const uint8_t *userKey, int bits, AES_KEY *key);
- int aesni_set_decrypt_key(const uint8_t *userKey, int bits, AES_KEY *key);
-
- void aesni_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
- void aesni_decrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key);
-
- void aesni_ecb_encrypt(const uint8_t *in, uint8_t *out, size_t length,
- const AES_KEY *key, int enc);
- void aesni_cbc_encrypt(const uint8_t *in, uint8_t *out, size_t length,
- const AES_KEY *key, uint8_t *ivec, int enc);
-
- void aesni_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t blocks,
- const void *key, const uint8_t *ivec);
-
- #if defined(OPENSSL_X86_64)
- size_t aesni_gcm_encrypt(const uint8_t *in, uint8_t *out, size_t len,
- const void *key, uint8_t ivec[16], uint64_t *Xi);
- #define AES_gcm_encrypt aesni_gcm_encrypt
- size_t aesni_gcm_decrypt(const uint8_t *in, uint8_t *out, size_t len,
- const void *key, uint8_t ivec[16], uint64_t *Xi);
- #define AES_gcm_decrypt aesni_gcm_decrypt
- void gcm_ghash_avx(uint64_t Xi[2], const u128 Htable[16], const uint8_t *in,
- size_t len);
- #define AES_GCM_ASM(gctx) \
- (gctx->ctr == aesni_ctr32_encrypt_blocks && gctx->gcm.ghash == gcm_ghash_avx)
- #endif /* OPENSSL_X86_64 */
-
- #else
-
- /* On other platforms, aesni_capable() will always return false and so the
- * following will never be called. */
- void aesni_encrypt(const uint8_t *in, uint8_t *out, const AES_KEY *key) {
- abort();
- }
- int aesni_set_encrypt_key(const uint8_t *userKey, int bits, AES_KEY *key) {
- abort();
- }
- void aesni_ctr32_encrypt_blocks(const uint8_t *in, uint8_t *out, size_t blocks,
- const void *key, const uint8_t *ivec) {
- abort();
- }
-
- #endif
-
- static int aes_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
- const uint8_t *iv, int enc) {
- int ret, mode;
- EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
-
- mode = ctx->cipher->flags & EVP_CIPH_MODE_MASK;
- if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) && !enc) {
- if (bsaes_capable() && mode == EVP_CIPH_CBC_MODE) {
- ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
- dat->block = (block128_f)AES_decrypt;
- dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt;
- } else if (vpaes_capable()) {
- ret = vpaes_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
- dat->block = (block128_f)vpaes_decrypt;
- dat->stream.cbc =
- mode == EVP_CIPH_CBC_MODE ? (cbc128_f)vpaes_cbc_encrypt : NULL;
- } else {
- ret = AES_set_decrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
- dat->block = (block128_f)AES_decrypt;
- dat->stream.cbc =
- mode == EVP_CIPH_CBC_MODE ? (cbc128_f)AES_cbc_encrypt : NULL;
- }
- } else if (bsaes_capable() && mode == EVP_CIPH_CTR_MODE) {
- ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
- dat->block = (block128_f)AES_encrypt;
- dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks;
- } else if (vpaes_capable()) {
- ret = vpaes_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
- dat->block = (block128_f)vpaes_encrypt;
- dat->stream.cbc =
- mode == EVP_CIPH_CBC_MODE ? (cbc128_f)vpaes_cbc_encrypt : NULL;
- } else {
- ret = AES_set_encrypt_key(key, ctx->key_len * 8, &dat->ks.ks);
- dat->block = (block128_f)AES_encrypt;
- dat->stream.cbc =
- mode == EVP_CIPH_CBC_MODE ? (cbc128_f)AES_cbc_encrypt : NULL;
- }
-
- if (ret < 0) {
- OPENSSL_PUT_ERROR(CIPHER, aes_init_key, CIPHER_R_AES_KEY_SETUP_FAILED);
- return 0;
- }
-
- return 1;
- }
-
- static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t len) {
- EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
-
- if (dat->stream.cbc) {
- (*dat->stream.cbc)(in, out, len, &dat->ks, ctx->iv, ctx->encrypt);
- } else if (ctx->encrypt) {
- CRYPTO_cbc128_encrypt(in, out, len, &dat->ks, ctx->iv, dat->block);
- } else {
- CRYPTO_cbc128_decrypt(in, out, len, &dat->ks, ctx->iv, dat->block);
- }
-
- return 1;
- }
-
- static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t len) {
- size_t bl = ctx->cipher->block_size;
- size_t i;
- EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
-
- if (len < bl) {
- return 1;
- }
-
- for (i = 0, len -= bl; i <= len; i += bl) {
- (*dat->block)(in + i, out + i, &dat->ks);
- }
-
- return 1;
- }
-
- static int aes_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t len) {
- unsigned int num = ctx->num;
- EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
-
- if (dat->stream.ctr) {
- CRYPTO_ctr128_encrypt_ctr32(in, out, len, &dat->ks, ctx->iv, ctx->buf, &num,
- dat->stream.ctr);
- } else {
- CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv, ctx->buf, &num,
- dat->block);
- }
- ctx->num = (size_t)num;
- return 1;
- }
-
- static ctr128_f aes_gcm_set_key(AES_KEY *aes_key, GCM128_CONTEXT *gcm_ctx,
- const uint8_t *key, size_t key_len) {
- if (bsaes_capable()) {
- AES_set_encrypt_key(key, key_len * 8, aes_key);
- CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)AES_encrypt);
- return (ctr128_f)bsaes_ctr32_encrypt_blocks;
- }
-
- if (vpaes_capable()) {
- vpaes_set_encrypt_key(key, key_len * 8, aes_key);
- CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)vpaes_encrypt);
- return NULL;
- }
-
- AES_set_encrypt_key(key, key_len * 8, aes_key);
- CRYPTO_gcm128_init(gcm_ctx, aes_key, (block128_f)AES_encrypt);
- return NULL;
- }
-
- static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
- const uint8_t *iv, int enc) {
- EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
- if (!iv && !key) {
- return 1;
- }
- if (key) {
- gctx->ctr = aes_gcm_set_key(&gctx->ks.ks, &gctx->gcm, key, ctx->key_len);
- /* 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_cleanup(EVP_CIPHER_CTX *c) {
- EVP_AES_GCM_CTX *gctx = c->cipher_data;
- OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm));
- if (gctx->iv != c->iv) {
- OPENSSL_free(gctx->iv);
- }
- return 1;
- }
-
- /* increment counter (64-bit int) by 1 */
- static void ctr64_inc(uint8_t *counter) {
- int n = 8;
- uint8_t 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) {
- case EVP_CTRL_INIT:
- 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;
- }
-
- /* 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(c->buf, 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, c->buf, 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 (c->encrypt &&
- RAND_pseudo_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);
- if (arg <= 0 || arg > gctx->ivlen) {
- arg = gctx->ivlen;
- }
- memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
- /* 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;
-
- case EVP_CTRL_GCM_SET_IV_INV:
- if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) {
- return 0;
- }
- memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
- CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
- gctx->iv_set = 1;
- return 1;
-
- default:
- return -1;
- }
- }
-
- static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
- size_t len) {
- EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
-
- /* If not set up, return error */
- if (!gctx->key_set) {
- return -1;
- }
- if (!gctx->iv_set) {
- return -1;
- }
-
- if (in) {
- if (out == NULL) {
- if (!CRYPTO_gcm128_aad(&gctx->gcm, in, len)) {
- return -1;
- }
- } else if (ctx->encrypt) {
- if (gctx->ctr) {
- size_t bulk = 0;
- #if defined(AES_GCM_ASM)
- if (len >= 32 && AES_GCM_ASM(gctx)) {
- size_t res = (16 - gctx->gcm.mres) % 16;
-
- if (!CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, res)) {
- return -1;
- }
-
- bulk = AES_gcm_encrypt(in + res, out + res, len - res, gctx->gcm.key,
- gctx->gcm.Yi.c, gctx->gcm.Xi.u);
- gctx->gcm.len.u[1] += bulk;
- bulk += res;
- }
- #endif
- if (!CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, in + bulk, out + bulk,
- len - bulk, gctx->ctr)) {
- return -1;
- }
- } else {
- size_t bulk = 0;
- if (!CRYPTO_gcm128_encrypt(&gctx->gcm, in + bulk, out + bulk,
- len - bulk)) {
- return -1;
- }
- }
- } else {
- if (gctx->ctr) {
- size_t bulk = 0;
- #if defined(AES_GCM_ASM)
- if (len >= 16 && AES_GCM_ASM(gctx)) {
- size_t res = (16 - gctx->gcm.mres) % 16;
-
- if (!CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, res)) {
- return -1;
- }
-
- bulk = AES_gcm_decrypt(in + res, out + res, len - res, gctx->gcm.key,
- gctx->gcm.Yi.c, gctx->gcm.Xi.u);
- gctx->gcm.len.u[1] += bulk;
- bulk += res;
- }
- #endif
- if (!CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, in + bulk, out + bulk,
- len - bulk, gctx->ctr)) {
- return -1;
- }
- } else {
- size_t bulk = 0;
- if (!CRYPTO_gcm128_decrypt(&gctx->gcm, in + bulk, out + bulk,
- len - bulk)) {
- return -1;
- }
- }
- }
- return len;
- } else {
- if (!ctx->encrypt) {
- if (gctx->taglen < 0 ||
- !CRYPTO_gcm128_finish(&gctx->gcm, ctx->buf, gctx->taglen) != 0) {
- return -1;
- }
- gctx->iv_set = 0;
- return 0;
- }
- CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16);
- gctx->taglen = 16;
- /* Don't reuse the IV */
- gctx->iv_set = 0;
- return 0;
- }
- }
-
- static const EVP_CIPHER aes_128_cbc = {
- NID_aes_128_cbc, 16 /* block_size */, 16 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CBC_MODE,
- NULL /* app_data */, aes_init_key, aes_cbc_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aes_128_ctr = {
- NID_aes_128_ctr, 1 /* block_size */, 16 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CTR_MODE,
- NULL /* app_data */, aes_init_key, aes_ctr_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aes_128_ecb = {
- NID_aes_128_ecb, 16 /* block_size */, 16 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_ECB_MODE,
- NULL /* app_data */, aes_init_key, aes_ecb_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aes_128_gcm = {
- NID_aes_128_gcm, 1 /* block_size */, 16 /* key_size */, 12 /* iv_len */,
- sizeof(EVP_AES_GCM_CTX),
- EVP_CIPH_GCM_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
- EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT |
- EVP_CIPH_FLAG_AEAD_CIPHER,
- NULL /* app_data */, aes_gcm_init_key, aes_gcm_cipher, aes_gcm_cleanup,
- aes_gcm_ctrl};
-
-
- static const EVP_CIPHER aes_256_cbc = {
- NID_aes_128_cbc, 16 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CBC_MODE,
- NULL /* app_data */, aes_init_key, aes_cbc_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aes_256_ctr = {
- NID_aes_128_ctr, 1 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CTR_MODE,
- NULL /* app_data */, aes_init_key, aes_ctr_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aes_256_ecb = {
- NID_aes_128_ecb, 16 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_ECB_MODE,
- NULL /* app_data */, aes_init_key, aes_ecb_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aes_256_gcm = {
- NID_aes_128_gcm, 1 /* block_size */, 32 /* key_size */, 12 /* iv_len */,
- sizeof(EVP_AES_GCM_CTX),
- EVP_CIPH_GCM_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
- EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT |
- EVP_CIPH_FLAG_AEAD_CIPHER,
- NULL /* app_data */, aes_gcm_init_key, aes_gcm_cipher, aes_gcm_cleanup,
- aes_gcm_ctrl};
-
- #if !defined(OPENSSL_NO_ASM) && \
- (defined(OPENSSL_X86_64) || defined(OPENSSL_X86))
-
- /* AES-NI section. */
-
- static char aesni_capable() {
- return (OPENSSL_ia32cap_P[1] & (1 << (57 - 32))) != 0;
- }
-
- static int aesni_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
- const uint8_t *iv, int enc) {
- int ret, mode;
- EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data;
-
- mode = ctx->cipher->flags & EVP_CIPH_MODE_MASK;
- if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) && !enc) {
- ret = aesni_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
- dat->block = (block128_f)aesni_decrypt;
- dat->stream.cbc =
- mode == EVP_CIPH_CBC_MODE ? (cbc128_f)aesni_cbc_encrypt : NULL;
- } else {
- ret = aesni_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data);
- dat->block = (block128_f)aesni_encrypt;
- if (mode == EVP_CIPH_CBC_MODE) {
- dat->stream.cbc = (cbc128_f)aesni_cbc_encrypt;
- } else if (mode == EVP_CIPH_CTR_MODE) {
- dat->stream.ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
- } else {
- dat->stream.cbc = NULL;
- }
- }
-
- if (ret < 0) {
- OPENSSL_PUT_ERROR(CIPHER, aesni_init_key, CIPHER_R_AES_KEY_SETUP_FAILED);
- return 0;
- }
-
- return 1;
- }
-
- static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
- const uint8_t *in, size_t len) {
- aesni_cbc_encrypt(in, out, len, ctx->cipher_data, ctx->iv, ctx->encrypt);
-
- return 1;
- }
-
- static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out,
- const uint8_t *in, size_t len) {
- size_t bl = ctx->cipher->block_size;
-
- if (len < bl) {
- return 1;
- }
-
- aesni_ecb_encrypt(in, out, len, ctx->cipher_data, ctx->encrypt);
-
- return 1;
- }
-
- static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
- const uint8_t *iv, int enc) {
- EVP_AES_GCM_CTX *gctx = ctx->cipher_data;
- if (!iv && !key) {
- return 1;
- }
- if (key) {
- aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks.ks);
- CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)aesni_encrypt);
- gctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
- /* 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 const EVP_CIPHER aesni_128_cbc = {
- NID_aes_128_cbc, 16 /* block_size */, 16 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CBC_MODE,
- NULL /* app_data */, aesni_init_key, aesni_cbc_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aesni_128_ctr = {
- NID_aes_128_ctr, 1 /* block_size */, 16 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CTR_MODE,
- NULL /* app_data */, aesni_init_key, aes_ctr_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aesni_128_ecb = {
- NID_aes_128_ecb, 16 /* block_size */, 16 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_ECB_MODE,
- NULL /* app_data */, aesni_init_key, aesni_ecb_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aesni_128_gcm = {
- NID_aes_128_gcm, 1 /* block_size */, 16 /* key_size */, 12 /* iv_len */,
- sizeof(EVP_AES_GCM_CTX),
- EVP_CIPH_GCM_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
- EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT |
- EVP_CIPH_FLAG_AEAD_CIPHER,
- NULL /* app_data */, aesni_gcm_init_key, aes_gcm_cipher, aes_gcm_cleanup,
- aes_gcm_ctrl};
-
-
- static const EVP_CIPHER aesni_256_cbc = {
- NID_aes_128_cbc, 16 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CBC_MODE,
- NULL /* app_data */, aesni_init_key, aesni_cbc_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aesni_256_ctr = {
- NID_aes_128_ctr, 1 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_CTR_MODE,
- NULL /* app_data */, aesni_init_key, aes_ctr_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aesni_256_ecb = {
- NID_aes_128_ecb, 16 /* block_size */, 32 /* key_size */,
- 16 /* iv_len */, sizeof(EVP_AES_KEY), EVP_CIPH_ECB_MODE,
- NULL /* app_data */, aesni_init_key, aesni_ecb_cipher,
- NULL /* cleanup */, NULL /* ctrl */};
-
- static const EVP_CIPHER aesni_256_gcm = {
- NID_aes_256_gcm, 1 /* block_size */, 32 /* key_size */, 12 /* iv_len */,
- sizeof(EVP_AES_GCM_CTX),
- EVP_CIPH_GCM_MODE | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER |
- EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT |
- EVP_CIPH_FLAG_AEAD_CIPHER,
- NULL /* app_data */, aesni_gcm_init_key, aes_gcm_cipher, aes_gcm_cleanup,
- aes_gcm_ctrl};
-
- #define EVP_CIPHER_FUNCTION(keybits, mode) \
- const EVP_CIPHER *EVP_aes_##keybits##_##mode(void) { \
- if (aesni_capable()) { \
- return &aesni_##keybits##_##mode; \
- } else { \
- return &aes_##keybits##_##mode; \
- } \
- }
-
- #else /* ^^^ OPENSSL_X86_64 || OPENSSL_X86 */
-
- static char aesni_capable() {
- return 0;
- }
-
- #define EVP_CIPHER_FUNCTION(keybits, mode) \
- const EVP_CIPHER *EVP_aes_##keybits##_##mode(void) { \
- return &aes_##keybits##_##mode; \
- }
-
- #endif
-
- EVP_CIPHER_FUNCTION(128, cbc)
- EVP_CIPHER_FUNCTION(128, ctr)
- EVP_CIPHER_FUNCTION(128, ecb)
- EVP_CIPHER_FUNCTION(128, gcm)
-
- EVP_CIPHER_FUNCTION(256, cbc)
- EVP_CIPHER_FUNCTION(256, ctr)
- EVP_CIPHER_FUNCTION(256, ecb)
- EVP_CIPHER_FUNCTION(256, gcm)
-
-
- #define EVP_AEAD_AES_GCM_TAG_LEN 16
-
- struct aead_aes_gcm_ctx {
- union {
- double align;
- AES_KEY ks;
- } ks;
- GCM128_CONTEXT gcm;
- ctr128_f ctr;
- uint8_t tag_len;
- };
-
- static int aead_aes_gcm_init(EVP_AEAD_CTX *ctx, const uint8_t *key,
- size_t key_len, size_t tag_len) {
- struct aead_aes_gcm_ctx *gcm_ctx;
- const size_t key_bits = key_len * 8;
-
- if (key_bits != 128 && key_bits != 256) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_init, CIPHER_R_BAD_KEY_LENGTH);
- return 0; /* EVP_AEAD_CTX_init should catch this. */
- }
-
- if (tag_len == EVP_AEAD_DEFAULT_TAG_LENGTH) {
- tag_len = EVP_AEAD_AES_GCM_TAG_LEN;
- }
-
- if (tag_len > EVP_AEAD_AES_GCM_TAG_LEN) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_init, CIPHER_R_TAG_TOO_LARGE);
- return 0;
- }
-
- gcm_ctx = OPENSSL_malloc(sizeof(struct aead_aes_gcm_ctx));
- if (gcm_ctx == NULL) {
- return 0;
- }
-
- if (aesni_capable()) {
- aesni_set_encrypt_key(key, key_len * 8, &gcm_ctx->ks.ks);
- CRYPTO_gcm128_init(&gcm_ctx->gcm, &gcm_ctx->ks.ks,
- (block128_f)aesni_encrypt);
- gcm_ctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks;
- } else {
- gcm_ctx->ctr =
- aes_gcm_set_key(&gcm_ctx->ks.ks, &gcm_ctx->gcm, key, key_len);
- }
- gcm_ctx->tag_len = tag_len;
- ctx->aead_state = gcm_ctx;
-
- return 1;
- }
-
- static void aead_aes_gcm_cleanup(EVP_AEAD_CTX *ctx) {
- struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
- OPENSSL_cleanse(gcm_ctx, sizeof(struct aead_aes_gcm_ctx));
- OPENSSL_free(gcm_ctx);
- }
-
- static int aead_aes_gcm_seal(const EVP_AEAD_CTX *ctx, uint8_t *out,
- size_t *out_len, size_t max_out_len,
- const uint8_t *nonce, size_t nonce_len,
- const uint8_t *in, size_t in_len,
- const uint8_t *ad, size_t ad_len) {
- size_t bulk = 0;
- const struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
- GCM128_CONTEXT gcm;
-
- if (in_len + gcm_ctx->tag_len < in_len) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_seal, CIPHER_R_TOO_LARGE);
- return 0;
- }
-
- if (max_out_len < in_len + gcm_ctx->tag_len) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_seal, CIPHER_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- memcpy(&gcm, &gcm_ctx->gcm, sizeof(gcm));
- CRYPTO_gcm128_setiv(&gcm, nonce, nonce_len);
-
- if (ad_len > 0 && !CRYPTO_gcm128_aad(&gcm, ad, ad_len)) {
- return 0;
- }
-
- if (gcm_ctx->ctr) {
- if (!CRYPTO_gcm128_encrypt_ctr32(&gcm, in + bulk, out + bulk, in_len - bulk,
- gcm_ctx->ctr)) {
- return 0;
- }
- } else {
- if (!CRYPTO_gcm128_encrypt(&gcm, in + bulk, out + bulk, in_len - bulk)) {
- return 0;
- }
- }
-
- CRYPTO_gcm128_tag(&gcm, out + in_len, gcm_ctx->tag_len);
- *out_len = in_len + gcm_ctx->tag_len;
- return 1;
- }
-
- static int aead_aes_gcm_open(const EVP_AEAD_CTX *ctx, uint8_t *out,
- size_t *out_len, size_t max_out_len,
- const uint8_t *nonce, size_t nonce_len,
- const uint8_t *in, size_t in_len,
- const uint8_t *ad, size_t ad_len) {
- size_t bulk = 0;
- const struct aead_aes_gcm_ctx *gcm_ctx = ctx->aead_state;
- uint8_t tag[EVP_AEAD_AES_GCM_TAG_LEN];
- size_t plaintext_len;
- GCM128_CONTEXT gcm;
-
- if (in_len < gcm_ctx->tag_len) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_open, CIPHER_R_BAD_DECRYPT);
- return 0;
- }
-
- plaintext_len = in_len - gcm_ctx->tag_len;
-
- if (max_out_len < plaintext_len) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_open, CIPHER_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- memcpy(&gcm, &gcm_ctx->gcm, sizeof(gcm));
- CRYPTO_gcm128_setiv(&gcm, nonce, nonce_len);
-
- if (!CRYPTO_gcm128_aad(&gcm, ad, ad_len)) {
- return 0;
- }
-
- if (gcm_ctx->ctr) {
- if (!CRYPTO_gcm128_decrypt_ctr32(&gcm, in + bulk, out + bulk,
- in_len - bulk - gcm_ctx->tag_len,
- gcm_ctx->ctr)) {
- return 0;
- }
- } else {
- if (!CRYPTO_gcm128_decrypt(&gcm, in + bulk, out + bulk,
- in_len - bulk - gcm_ctx->tag_len)) {
- return 0;
- }
- }
-
- CRYPTO_gcm128_tag(&gcm, tag, gcm_ctx->tag_len);
- if (CRYPTO_memcmp(tag, in + plaintext_len, gcm_ctx->tag_len) != 0) {
- OPENSSL_PUT_ERROR(CIPHER, aead_aes_gcm_open, CIPHER_R_BAD_DECRYPT);
- return 0;
- }
-
- *out_len = plaintext_len;
- return 1;
- }
-
- static const EVP_AEAD aead_aes_128_gcm = {
- 16, /* key len */
- 12, /* nonce len */
- EVP_AEAD_AES_GCM_TAG_LEN, /* overhead */
- EVP_AEAD_AES_GCM_TAG_LEN, /* max tag length */
- aead_aes_gcm_init, aead_aes_gcm_cleanup,
- aead_aes_gcm_seal, aead_aes_gcm_open,
- };
-
- static const EVP_AEAD aead_aes_256_gcm = {
- 32, /* key len */
- 12, /* nonce len */
- EVP_AEAD_AES_GCM_TAG_LEN, /* overhead */
- EVP_AEAD_AES_GCM_TAG_LEN, /* max tag length */
- aead_aes_gcm_init, aead_aes_gcm_cleanup,
- aead_aes_gcm_seal, aead_aes_gcm_open,
- };
-
- const EVP_AEAD *EVP_aead_aes_128_gcm() { return &aead_aes_128_gcm; }
-
- const EVP_AEAD *EVP_aead_aes_256_gcm() { return &aead_aes_256_gcm; }
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