+++ /dev/null
-/* $OpenBSD: e_aes_cbc_hmac_sha1.c,v 1.20 2024/01/08 09:31:09 tb Exp $ */
-/* ====================================================================
- * Copyright (c) 2011-2013 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
- * licensing@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 <stdio.h>
-#include <string.h>
-
-#include <openssl/opensslconf.h>
-
-#if !defined(OPENSSL_NO_AES) && !defined(OPENSSL_NO_SHA1)
-
-#include <openssl/evp.h>
-#include <openssl/objects.h>
-#include <openssl/aes.h>
-#include <openssl/sha.h>
-
-#include "constant_time.h"
-#include "evp_local.h"
-
-#define TLS1_1_VERSION 0x0302
-
-typedef struct {
- AES_KEY ks;
- SHA_CTX head, tail, md;
- size_t payload_length; /* AAD length in decrypt case */
- union {
- unsigned int tls_ver;
- unsigned char tls_aad[16]; /* 13 used */
- } aux;
-} EVP_AES_HMAC_SHA1;
-
-#define NO_PAYLOAD_LENGTH ((size_t)-1)
-
-#if defined(AES_ASM) && ( \
- defined(__x86_64) || defined(__x86_64__) || \
- defined(_M_AMD64) || defined(_M_X64) || \
- defined(__INTEL__) )
-
-#include "x86_arch.h"
-
-#if defined(__GNUC__) && __GNUC__>=2
-# define BSWAP(x) ({ unsigned int r=(x); asm ("bswapl %0":"=r"(r):"0"(r)); r; })
-#endif
-
-int aesni_set_encrypt_key(const unsigned char *userKey, int bits, AES_KEY *key);
-int aesni_set_decrypt_key(const unsigned char *userKey, int bits, AES_KEY *key);
-
-void aesni_cbc_encrypt(const unsigned char *in, unsigned char *out,
- size_t length, const AES_KEY *key, unsigned char *ivec, int enc);
-
-void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks,
- const AES_KEY *key, unsigned char iv[16], SHA_CTX *ctx, const void *in0);
-
-#define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data)
-
-static int
-aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *inkey,
- const unsigned char *iv, int enc)
-{
- EVP_AES_HMAC_SHA1 *key = data(ctx);
- int ret;
-
- if (enc)
- ret = aesni_set_encrypt_key(inkey, ctx->key_len * 8, &key->ks);
- else
- ret = aesni_set_decrypt_key(inkey, ctx->key_len * 8, &key->ks);
-
- SHA1_Init(&key->head); /* handy when benchmarking */
- key->tail = key->head;
- key->md = key->head;
-
- key->payload_length = NO_PAYLOAD_LENGTH;
-
- return ret < 0 ? 0 : 1;
-}
-
-#define STITCHED_CALL
-
-#if !defined(STITCHED_CALL)
-#define aes_off 0
-#endif
-
-void sha1_block_data_order (void *c, const void *p, size_t len);
-
-static void
-sha1_update(SHA_CTX *c, const void *data, size_t len)
-{
- const unsigned char *ptr = data;
- size_t res;
-
- if ((res = c->num)) {
- res = SHA_CBLOCK - res;
- if (len < res)
- res = len;
- SHA1_Update(c, ptr, res);
- ptr += res;
- len -= res;
- }
-
- res = len % SHA_CBLOCK;
- len -= res;
-
- if (len) {
- sha1_block_data_order(c, ptr, len / SHA_CBLOCK);
-
- ptr += len;
- c->Nh += len >> 29;
- c->Nl += len <<= 3;
- if (c->Nl < (unsigned int)len)
- c->Nh++;
- }
-
- if (res)
- SHA1_Update(c, ptr, res);
-}
-
-#ifdef SHA1_Update
-#undef SHA1_Update
-#endif
-#define SHA1_Update sha1_update
-
-static int
-aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t len)
-{
- EVP_AES_HMAC_SHA1 *key = data(ctx);
- unsigned int l;
- size_t plen = key->payload_length,
- iv = 0, /* explicit IV in TLS 1.1 and later */
- sha_off = 0;
-#if defined(STITCHED_CALL)
- size_t aes_off = 0, blocks;
-
- sha_off = SHA_CBLOCK - key->md.num;
-#endif
-
- key->payload_length = NO_PAYLOAD_LENGTH;
-
- if (len % AES_BLOCK_SIZE)
- return 0;
-
- if (ctx->encrypt) {
- if (plen == NO_PAYLOAD_LENGTH)
- plen = len;
- else if (len != ((plen + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE) &
- -AES_BLOCK_SIZE))
- return 0;
- else if (key->aux.tls_ver >= TLS1_1_VERSION)
- iv = AES_BLOCK_SIZE;
-
-#if defined(STITCHED_CALL)
- if (plen > (sha_off + iv) &&
- (blocks = (plen - (sha_off + iv)) / SHA_CBLOCK)) {
- SHA1_Update(&key->md, in + iv, sha_off);
-
- aesni_cbc_sha1_enc(in, out, blocks, &key->ks,
- ctx->iv, &key->md, in + iv + sha_off);
- blocks *= SHA_CBLOCK;
- aes_off += blocks;
- sha_off += blocks;
- key->md.Nh += blocks >> 29;
- key->md.Nl += blocks <<= 3;
- if (key->md.Nl < (unsigned int)blocks)
- key->md.Nh++;
- } else {
- sha_off = 0;
- }
-#endif
- sha_off += iv;
- SHA1_Update(&key->md, in + sha_off, plen - sha_off);
-
- if (plen != len) { /* "TLS" mode of operation */
- if (in != out)
- memcpy(out + aes_off, in + aes_off,
- plen - aes_off);
-
- /* calculate HMAC and append it to payload */
- SHA1_Final(out + plen, &key->md);
- key->md = key->tail;
- SHA1_Update(&key->md, out + plen, SHA_DIGEST_LENGTH);
- SHA1_Final(out + plen, &key->md);
-
- /* pad the payload|hmac */
- plen += SHA_DIGEST_LENGTH;
- for (l = len - plen - 1; plen < len; plen++)
- out[plen] = l;
-
- /* encrypt HMAC|padding at once */
- aesni_cbc_encrypt(out + aes_off, out + aes_off,
- len - aes_off, &key->ks, ctx->iv, 1);
- } else {
- aesni_cbc_encrypt(in + aes_off, out + aes_off,
- len - aes_off, &key->ks, ctx->iv, 1);
- }
- } else {
- union {
- unsigned int u[SHA_DIGEST_LENGTH/sizeof(unsigned int)];
- unsigned char c[32 + SHA_DIGEST_LENGTH];
- } mac, *pmac;
-
- /* arrange cache line alignment */
- pmac = (void *)(((size_t)mac.c + 31) & ((size_t)0 - 32));
-
- /* decrypt HMAC|padding at once */
- aesni_cbc_encrypt(in, out, len, &key->ks, ctx->iv, 0);
-
- if (plen == 0 || plen == NO_PAYLOAD_LENGTH) {
- SHA1_Update(&key->md, out, len);
- } else if (plen < 4) {
- return 0;
- } else { /* "TLS" mode of operation */
- size_t inp_len, mask, j, i;
- unsigned int res, maxpad, pad, bitlen;
- int ret = 1;
- union {
- unsigned int u[SHA_LBLOCK];
- unsigned char c[SHA_CBLOCK];
- }
- *data = (void *)key->md.data;
-
- if ((key->aux.tls_aad[plen - 4] << 8 |
- key->aux.tls_aad[plen - 3]) >= TLS1_1_VERSION)
- iv = AES_BLOCK_SIZE;
-
- if (len < (iv + SHA_DIGEST_LENGTH + 1))
- return 0;
-
- /* omit explicit iv */
- out += iv;
- len -= iv;
-
- /* figure out payload length */
- pad = out[len - 1];
- maxpad = len - (SHA_DIGEST_LENGTH + 1);
- maxpad |= (255 - maxpad) >> (sizeof(maxpad) * 8 - 8);
- maxpad &= 255;
-
- ret &= constant_time_ge(maxpad, pad);
-
- inp_len = len - (SHA_DIGEST_LENGTH + pad + 1);
- mask = (0 - ((inp_len - len) >>
- (sizeof(inp_len) * 8 - 1)));
- inp_len &= mask;
- ret &= (int)mask;
-
- key->aux.tls_aad[plen - 2] = inp_len >> 8;
- key->aux.tls_aad[plen - 1] = inp_len;
-
- /* calculate HMAC */
- key->md = key->head;
- SHA1_Update(&key->md, key->aux.tls_aad, plen);
-
-#if 1
- len -= SHA_DIGEST_LENGTH; /* amend mac */
- if (len >= (256 + SHA_CBLOCK)) {
- j = (len - (256 + SHA_CBLOCK)) &
- (0 - SHA_CBLOCK);
- j += SHA_CBLOCK - key->md.num;
- SHA1_Update(&key->md, out, j);
- out += j;
- len -= j;
- inp_len -= j;
- }
-
- /* but pretend as if we hashed padded payload */
- bitlen = key->md.Nl + (inp_len << 3); /* at most 18 bits */
-#ifdef BSWAP
- bitlen = BSWAP(bitlen);
-#else
- mac.c[0] = 0;
- mac.c[1] = (unsigned char)(bitlen >> 16);
- mac.c[2] = (unsigned char)(bitlen >> 8);
- mac.c[3] = (unsigned char)bitlen;
- bitlen = mac.u[0];
-#endif
-
- pmac->u[0] = 0;
- pmac->u[1] = 0;
- pmac->u[2] = 0;
- pmac->u[3] = 0;
- pmac->u[4] = 0;
-
- for (res = key->md.num, j = 0; j < len; j++) {
- size_t c = out[j];
- mask = (j - inp_len) >> (sizeof(j) * 8 - 8);
- c &= mask;
- c |= 0x80 & ~mask &
- ~((inp_len - j) >> (sizeof(j) * 8 - 8));
- data->c[res++] = (unsigned char)c;
-
- if (res != SHA_CBLOCK)
- continue;
-
- /* j is not incremented yet */
- mask = 0 - ((inp_len + 7 - j) >>
- (sizeof(j) * 8 - 1));
- data->u[SHA_LBLOCK - 1] |= bitlen&mask;
- sha1_block_data_order(&key->md, data, 1);
- mask &= 0 - ((j - inp_len - 72) >>
- (sizeof(j) * 8 - 1));
- pmac->u[0] |= key->md.h0 & mask;
- pmac->u[1] |= key->md.h1 & mask;
- pmac->u[2] |= key->md.h2 & mask;
- pmac->u[3] |= key->md.h3 & mask;
- pmac->u[4] |= key->md.h4 & mask;
- res = 0;
- }
-
- for (i = res; i < SHA_CBLOCK; i++, j++)
- data->c[i] = 0;
-
- if (res > SHA_CBLOCK - 8) {
- mask = 0 - ((inp_len + 8 - j) >>
- (sizeof(j) * 8 - 1));
- data->u[SHA_LBLOCK - 1] |= bitlen & mask;
- sha1_block_data_order(&key->md, data, 1);
- mask &= 0 - ((j - inp_len - 73) >>
- (sizeof(j) * 8 - 1));
- pmac->u[0] |= key->md.h0 & mask;
- pmac->u[1] |= key->md.h1 & mask;
- pmac->u[2] |= key->md.h2 & mask;
- pmac->u[3] |= key->md.h3 & mask;
- pmac->u[4] |= key->md.h4 & mask;
-
- memset(data, 0, SHA_CBLOCK);
- j += 64;
- }
- data->u[SHA_LBLOCK - 1] = bitlen;
- sha1_block_data_order(&key->md, data, 1);
- mask = 0 - ((j - inp_len - 73) >> (sizeof(j) * 8 - 1));
- pmac->u[0] |= key->md.h0 & mask;
- pmac->u[1] |= key->md.h1 & mask;
- pmac->u[2] |= key->md.h2 & mask;
- pmac->u[3] |= key->md.h3 & mask;
- pmac->u[4] |= key->md.h4 & mask;
-
-#ifdef BSWAP
- pmac->u[0] = BSWAP(pmac->u[0]);
- pmac->u[1] = BSWAP(pmac->u[1]);
- pmac->u[2] = BSWAP(pmac->u[2]);
- pmac->u[3] = BSWAP(pmac->u[3]);
- pmac->u[4] = BSWAP(pmac->u[4]);
-#else
- for (i = 0; i < 5; i++) {
- res = pmac->u[i];
- pmac->c[4 * i + 0] = (unsigned char)(res >> 24);
- pmac->c[4 * i + 1] = (unsigned char)(res >> 16);
- pmac->c[4 * i + 2] = (unsigned char)(res >> 8);
- pmac->c[4 * i + 3] = (unsigned char)res;
- }
-#endif
- len += SHA_DIGEST_LENGTH;
-#else
- SHA1_Update(&key->md, out, inp_len);
- res = key->md.num;
- SHA1_Final(pmac->c, &key->md);
-
- {
- unsigned int inp_blocks, pad_blocks;
-
- /* but pretend as if we hashed padded payload */
- inp_blocks = 1 + ((SHA_CBLOCK - 9 - res) >>
- (sizeof(res) * 8 - 1));
- res += (unsigned int)(len - inp_len);
- pad_blocks = res / SHA_CBLOCK;
- res %= SHA_CBLOCK;
- pad_blocks += 1 + ((SHA_CBLOCK - 9 - res) >>
- (sizeof(res) * 8 - 1));
- for (; inp_blocks < pad_blocks; inp_blocks++)
- sha1_block_data_order(&key->md,
- data, 1);
- }
-#endif
- key->md = key->tail;
- SHA1_Update(&key->md, pmac->c, SHA_DIGEST_LENGTH);
- SHA1_Final(pmac->c, &key->md);
-
- /* verify HMAC */
- out += inp_len;
- len -= inp_len;
-#if 1
- {
- unsigned char *p =
- out + len - 1 - maxpad - SHA_DIGEST_LENGTH;
- size_t off = out - p;
- unsigned int c, cmask;
-
- maxpad += SHA_DIGEST_LENGTH;
- for (res = 0, i = 0, j = 0; j < maxpad; j++) {
- c = p[j];
- cmask = ((int)(j - off -
- SHA_DIGEST_LENGTH)) >>
- (sizeof(int) * 8 - 1);
- res |= (c ^ pad) & ~cmask; /* ... and padding */
- cmask &= ((int)(off - 1 - j)) >>
- (sizeof(int) * 8 - 1);
- res |= (c ^ pmac->c[i]) & cmask;
- i += 1 & cmask;
- }
- maxpad -= SHA_DIGEST_LENGTH;
-
- res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
- ret &= (int)~res;
- }
-#else
- for (res = 0, i = 0; i < SHA_DIGEST_LENGTH; i++)
- res |= out[i] ^ pmac->c[i];
- res = 0 - ((0 - res) >> (sizeof(res) * 8 - 1));
- ret &= (int)~res;
-
- /* verify padding */
- pad = (pad & ~res) | (maxpad & res);
- out = out + len - 1 - pad;
- for (res = 0, i = 0; i < pad; i++)
- res |= out[i] ^ pad;
-
- res = (0 - res) >> (sizeof(res) * 8 - 1);
- ret &= (int)~res;
-#endif
- return ret;
- }
- }
-
- return 1;
-}
-
-static int
-aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
-{
- EVP_AES_HMAC_SHA1 *key = data(ctx);
-
- switch (type) {
- case EVP_CTRL_AEAD_SET_MAC_KEY:
- {
- unsigned int i;
- unsigned char hmac_key[64];
-
- memset(hmac_key, 0, sizeof(hmac_key));
-
- if (arg > (int)sizeof(hmac_key)) {
- SHA1_Init(&key->head);
- SHA1_Update(&key->head, ptr, arg);
- SHA1_Final(hmac_key, &key->head);
- } else {
- memcpy(hmac_key, ptr, arg);
- }
-
- for (i = 0; i < sizeof(hmac_key); i++)
- hmac_key[i] ^= 0x36; /* ipad */
- SHA1_Init(&key->head);
- SHA1_Update(&key->head, hmac_key, sizeof(hmac_key));
-
- for (i = 0; i < sizeof(hmac_key); i++)
- hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
- SHA1_Init(&key->tail);
- SHA1_Update(&key->tail, hmac_key, sizeof(hmac_key));
-
- explicit_bzero(hmac_key, sizeof(hmac_key));
-
- return 1;
- }
- case EVP_CTRL_AEAD_TLS1_AAD:
- {
- unsigned char *p = ptr;
- unsigned int len;
-
- /* RFC 5246, 6.2.3.3: additional data has length 13 */
- if (arg != 13)
- return -1;
-
- len = p[arg - 2] << 8 | p[arg - 1];
-
- if (ctx->encrypt) {
- key->payload_length = len;
- if ((key->aux.tls_ver = p[arg - 4] << 8 |
- p[arg - 3]) >= TLS1_1_VERSION) {
- len -= AES_BLOCK_SIZE;
- p[arg - 2] = len >> 8;
- p[arg - 1] = len;
- }
- key->md = key->head;
- SHA1_Update(&key->md, p, arg);
-
- return (int)(((len + SHA_DIGEST_LENGTH +
- AES_BLOCK_SIZE) & -AES_BLOCK_SIZE) - len);
- } else {
- memcpy(key->aux.tls_aad, ptr, arg);
- key->payload_length = arg;
-
- return SHA_DIGEST_LENGTH;
- }
- }
- default:
- return -1;
- }
-}
-
-static const EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = {
-#ifdef NID_aes_128_cbc_hmac_sha1
- .nid = NID_aes_128_cbc_hmac_sha1,
-#else
- .nid = NID_undef,
-#endif
- .block_size = 16,
- .key_len = 16,
- .iv_len = 16,
- .flags = EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
- EVP_CIPH_FLAG_AEAD_CIPHER,
- .init = aesni_cbc_hmac_sha1_init_key,
- .do_cipher = aesni_cbc_hmac_sha1_cipher,
- .ctx_size = sizeof(EVP_AES_HMAC_SHA1),
- .ctrl = aesni_cbc_hmac_sha1_ctrl
-};
-
-static const EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = {
-#ifdef NID_aes_256_cbc_hmac_sha1
- .nid = NID_aes_256_cbc_hmac_sha1,
-#else
- .nid = NID_undef,
-#endif
- .block_size = 16,
- .key_len = 32,
- .iv_len = 16,
- .flags = EVP_CIPH_CBC_MODE | EVP_CIPH_FLAG_DEFAULT_ASN1 |
- EVP_CIPH_FLAG_AEAD_CIPHER,
- .init = aesni_cbc_hmac_sha1_init_key,
- .do_cipher = aesni_cbc_hmac_sha1_cipher,
- .ctx_size = sizeof(EVP_AES_HMAC_SHA1),
- .ctrl = aesni_cbc_hmac_sha1_ctrl
-};
-
-const EVP_CIPHER *
-EVP_aes_128_cbc_hmac_sha1(void)
-{
- return (OPENSSL_cpu_caps() & CPUCAP_MASK_AESNI) ?
- &aesni_128_cbc_hmac_sha1_cipher : NULL;
-}
-
-const EVP_CIPHER *
-EVP_aes_256_cbc_hmac_sha1(void)
-{
- return (OPENSSL_cpu_caps() & CPUCAP_MASK_AESNI) ?
- &aesni_256_cbc_hmac_sha1_cipher : NULL;
-}
-#else
-const EVP_CIPHER *
-EVP_aes_128_cbc_hmac_sha1(void)
-{
- return NULL;
-}
-
-const EVP_CIPHER *
-EVP_aes_256_cbc_hmac_sha1(void)
-{
- return NULL;
-}
-#endif
-#endif
+++ /dev/null
-/* $OpenBSD: e_rc4_hmac_md5.c,v 1.15 2024/01/07 16:18:18 tb Exp $ */
-/* ====================================================================
- * Copyright (c) 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
- * licensing@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 <stdio.h>
-#include <string.h>
-
-#include <openssl/opensslconf.h>
-
-#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)
-
-#include <openssl/evp.h>
-#include <openssl/objects.h>
-#include <openssl/rc4.h>
-#include <openssl/md5.h>
-
-#include "evp_local.h"
-
-/* FIXME: surely this is available elsewhere? */
-#define EVP_RC4_KEY_SIZE 16
-
-typedef struct {
- RC4_KEY ks;
- MD5_CTX head, tail, md;
- size_t payload_length;
-} EVP_RC4_HMAC_MD5;
-
-#define NO_PAYLOAD_LENGTH ((size_t)-1)
-
-void rc4_md5_enc (RC4_KEY *key, const void *in0, void *out,
- MD5_CTX *ctx, const void *inp, size_t blocks);
-
-#define data(ctx) ((EVP_RC4_HMAC_MD5 *)(ctx)->cipher_data)
-
-static int
-rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *inkey,
- const unsigned char *iv, int enc)
-{
- EVP_RC4_HMAC_MD5 *key = data(ctx);
-
- RC4_set_key(&key->ks, EVP_CIPHER_CTX_key_length(ctx), inkey);
-
- MD5_Init(&key->head); /* handy when benchmarking */
- key->tail = key->head;
- key->md = key->head;
-
- key->payload_length = NO_PAYLOAD_LENGTH;
-
- return 1;
-}
-
-#if !defined(OPENSSL_NO_ASM) && defined(RC4_MD5_ASM) && ( \
- defined(__x86_64) || defined(__x86_64__) || \
- defined(_M_AMD64) || defined(_M_X64) || \
- defined(__INTEL__) ) && \
- !(defined(__APPLE__) && defined(__MACH__))
-#define STITCHED_CALL
-#include "x86_arch.h"
-#endif
-
-#if !defined(STITCHED_CALL)
-#define rc4_off 0
-#define md5_off 0
-#endif
-
-static int
-rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
- const unsigned char *in, size_t len)
-{
- EVP_RC4_HMAC_MD5 *key = data(ctx);
-#if defined(STITCHED_CALL)
- size_t rc4_off = 32-1-(key->ks.x&(32-1)), /* 32 is $MOD from rc4_md5-x86_64.pl */
- md5_off = MD5_CBLOCK - key->md.num,
- blocks;
- unsigned int l;
-#endif
- size_t plen = key->payload_length;
-
- if (plen != NO_PAYLOAD_LENGTH && len != (plen + MD5_DIGEST_LENGTH))
- return 0;
-
- if (ctx->encrypt) {
- if (plen == NO_PAYLOAD_LENGTH)
- plen = len;
-#if defined(STITCHED_CALL)
- /* cipher has to "fall behind" */
- if (rc4_off > md5_off)
- md5_off += MD5_CBLOCK;
-
- if (plen > md5_off &&
- (blocks = (plen - md5_off) / MD5_CBLOCK) &&
- (OPENSSL_cpu_caps() & CPUCAP_MASK_INTELP4) == 0) {
- MD5_Update(&key->md, in, md5_off);
- RC4(&key->ks, rc4_off, in, out);
-
- rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
- &key->md, in + md5_off, blocks);
- blocks *= MD5_CBLOCK;
- rc4_off += blocks;
- md5_off += blocks;
- key->md.Nh += blocks >> 29;
- key->md.Nl += blocks <<= 3;
- if (key->md.Nl < (unsigned int)blocks)
- key->md.Nh++;
- } else {
- rc4_off = 0;
- md5_off = 0;
- }
-#endif
- MD5_Update(&key->md, in + md5_off, plen - md5_off);
-
- if (plen!=len) { /* "TLS" mode of operation */
- if (in != out)
- memcpy(out + rc4_off, in + rc4_off,
- plen - rc4_off);
-
- /* calculate HMAC and append it to payload */
- MD5_Final(out + plen, &key->md);
- key->md = key->tail;
- MD5_Update(&key->md, out + plen, MD5_DIGEST_LENGTH);
- MD5_Final(out + plen, &key->md);
-
- /* encrypt HMAC at once */
- RC4(&key->ks, len - rc4_off, out + rc4_off,
- out + rc4_off);
- } else {
- RC4(&key->ks, len - rc4_off, in + rc4_off,
- out + rc4_off);
- }
- } else {
- unsigned char mac[MD5_DIGEST_LENGTH];
-#if defined(STITCHED_CALL)
- /* digest has to "fall behind" */
- if (md5_off > rc4_off)
- rc4_off += 2*MD5_CBLOCK;
- else
- rc4_off += MD5_CBLOCK;
-
- if (len > rc4_off && (blocks = (len - rc4_off) / MD5_CBLOCK) &&
- (OPENSSL_cpu_caps() & CPUCAP_MASK_INTELP4) == 0) {
- RC4(&key->ks, rc4_off, in, out);
- MD5_Update(&key->md, out, md5_off);
-
- rc4_md5_enc(&key->ks, in + rc4_off, out + rc4_off,
- &key->md, out + md5_off, blocks);
- blocks *= MD5_CBLOCK;
- rc4_off += blocks;
- md5_off += blocks;
- l = (key->md.Nl + (blocks << 3)) & 0xffffffffU;
- if (l < key->md.Nl)
- key->md.Nh++;
- key->md.Nl = l;
- key->md.Nh += blocks >> 29;
- } else {
- md5_off = 0;
- rc4_off = 0;
- }
-#endif
- /* decrypt HMAC at once */
- RC4(&key->ks, len - rc4_off, in + rc4_off, out + rc4_off);
- if (plen!=NO_PAYLOAD_LENGTH) { /* "TLS" mode of operation */
- MD5_Update(&key->md, out + md5_off, plen - md5_off);
-
- /* calculate HMAC and verify it */
- MD5_Final(mac, &key->md);
- key->md = key->tail;
- MD5_Update(&key->md, mac, MD5_DIGEST_LENGTH);
- MD5_Final(mac, &key->md);
-
- if (memcmp(out + plen, mac, MD5_DIGEST_LENGTH))
- return 0;
- } else {
- MD5_Update(&key->md, out + md5_off, len - md5_off);
- }
- }
-
- key->payload_length = NO_PAYLOAD_LENGTH;
-
- return 1;
-}
-
-static int
-rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
-{
- EVP_RC4_HMAC_MD5 *key = data(ctx);
-
- switch (type) {
- case EVP_CTRL_AEAD_SET_MAC_KEY:
- {
- unsigned int i;
- unsigned char hmac_key[64];
-
- memset (hmac_key, 0, sizeof(hmac_key));
-
- if (arg > (int)sizeof(hmac_key)) {
- MD5_Init(&key->head);
- MD5_Update(&key->head, ptr, arg);
- MD5_Final(hmac_key, &key->head);
- } else {
- memcpy(hmac_key, ptr, arg);
- }
-
- for (i = 0; i < sizeof(hmac_key); i++)
- hmac_key[i] ^= 0x36; /* ipad */
- MD5_Init(&key->head);
- MD5_Update(&key->head, hmac_key, sizeof(hmac_key));
-
- for (i = 0; i < sizeof(hmac_key); i++)
- hmac_key[i] ^= 0x36 ^ 0x5c; /* opad */
- MD5_Init(&key->tail);
- MD5_Update(&key->tail, hmac_key, sizeof(hmac_key));
-
- return 1;
- }
- case EVP_CTRL_AEAD_TLS1_AAD:
- {
- unsigned char *p = ptr;
- unsigned int len = p[arg - 2] << 8 | p[arg - 1];
-
- if (!ctx->encrypt) {
- if (len < MD5_DIGEST_LENGTH)
- return -1;
- len -= MD5_DIGEST_LENGTH;
- p[arg - 2] = len >> 8;
- p[arg - 1] = len;
- }
- key->payload_length = len;
- key->md = key->head;
- MD5_Update(&key->md, p, arg);
-
- return MD5_DIGEST_LENGTH;
- }
- default:
- return -1;
- }
-}
-
-static const EVP_CIPHER r4_hmac_md5_cipher = {
-#ifdef NID_rc4_hmac_md5
- .nid = NID_rc4_hmac_md5,
-#else
- .nid = NID_undef,
-#endif
- .block_size = 1,
- .key_len = EVP_RC4_KEY_SIZE,
- .iv_len = 0,
- .flags = EVP_CIPH_STREAM_CIPHER|EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_FLAG_AEAD_CIPHER,
- .init = rc4_hmac_md5_init_key,
- .do_cipher = rc4_hmac_md5_cipher,
- .cleanup = NULL,
- .ctx_size = sizeof(EVP_RC4_HMAC_MD5),
- .set_asn1_parameters = NULL,
- .get_asn1_parameters = NULL,
- .ctrl = rc4_hmac_md5_ctrl,
-};
-
-const EVP_CIPHER *
-EVP_rc4_hmac_md5(void)
-{
- return (&r4_hmac_md5_cipher);
-}
-#endif
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