aboutsummaryrefslogtreecommitdiffhomepage
path: root/third_party/boringssl/src/crypto/cipher/e_rc4.c
diff options
context:
space:
mode:
Diffstat (limited to 'third_party/boringssl/src/crypto/cipher/e_rc4.c')
-rw-r--r--third_party/boringssl/src/crypto/cipher/e_rc4.c397
1 files changed, 0 insertions, 397 deletions
diff --git a/third_party/boringssl/src/crypto/cipher/e_rc4.c b/third_party/boringssl/src/crypto/cipher/e_rc4.c
deleted file mode 100644
index e05b9fda53..0000000000
--- a/third_party/boringssl/src/crypto/cipher/e_rc4.c
+++ /dev/null
@@ -1,397 +0,0 @@
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * 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 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 acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS 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 AUTHOR OR 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.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
-#include <openssl/aead.h>
-
-#include <assert.h>
-#include <string.h>
-
-#include <openssl/cipher.h>
-#include <openssl/cpu.h>
-#include <openssl/err.h>
-#include <openssl/md5.h>
-#include <openssl/mem.h>
-#include <openssl/obj.h>
-#include <openssl/rc4.h>
-
-#include "internal.h"
-
-
-static int rc4_init_key(EVP_CIPHER_CTX *ctx, const uint8_t *key,
- const uint8_t *iv, int enc) {
- RC4_KEY *rc4key = (RC4_KEY *)ctx->cipher_data;
-
- RC4_set_key(rc4key, EVP_CIPHER_CTX_key_length(ctx), key);
- return 1;
-}
-
-static int rc4_cipher(EVP_CIPHER_CTX *ctx, uint8_t *out, const uint8_t *in,
- size_t in_len) {
- RC4_KEY *rc4key = (RC4_KEY *)ctx->cipher_data;
-
- RC4(rc4key, in_len, in, out);
- return 1;
-}
-
-static const EVP_CIPHER rc4 = {
- NID_rc4, 1 /* block_size */, 16 /* key_size */,
- 0 /* iv_len */, sizeof(RC4_KEY), EVP_CIPH_VARIABLE_LENGTH,
- NULL /* app_data */, rc4_init_key, rc4_cipher,
- NULL /* cleanup */, NULL /* ctrl */, };
-
-const EVP_CIPHER *EVP_rc4(void) { return &rc4; }
-
-
-struct aead_rc4_md5_tls_ctx {
- RC4_KEY rc4;
- MD5_CTX head, tail, md;
- size_t payload_length;
- unsigned char tag_len;
-};
-
-
-static int
-aead_rc4_md5_tls_init(EVP_AEAD_CTX *ctx, const uint8_t *key, size_t key_len,
- size_t tag_len) {
- struct aead_rc4_md5_tls_ctx *rc4_ctx;
- size_t i;
- uint8_t hmac_key[MD5_CBLOCK];
-
- if (tag_len == EVP_AEAD_DEFAULT_TAG_LENGTH) {
- tag_len = MD5_DIGEST_LENGTH;
- }
-
- if (tag_len > MD5_DIGEST_LENGTH) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE);
- return 0;
- }
-
- /* The keys consists of |MD5_DIGEST_LENGTH| bytes of HMAC(MD5) key followed
- * by some number of bytes of RC4 key. */
- if (key_len <= MD5_DIGEST_LENGTH) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_KEY_LENGTH);
- return 0;
- }
-
- rc4_ctx = OPENSSL_malloc(sizeof(struct aead_rc4_md5_tls_ctx));
- if (rc4_ctx == NULL) {
- OPENSSL_PUT_ERROR(CIPHER, ERR_R_MALLOC_FAILURE);
- return 0;
- }
- memset(rc4_ctx, 0, sizeof(struct aead_rc4_md5_tls_ctx));
-
- RC4_set_key(&rc4_ctx->rc4, key_len - MD5_DIGEST_LENGTH,
- key + MD5_DIGEST_LENGTH);
-
- memset(hmac_key, 0, sizeof(hmac_key));
- memcpy(hmac_key, key, MD5_DIGEST_LENGTH);
- for (i = 0; i < sizeof(hmac_key); i++) {
- hmac_key[i] ^= 0x36;
- }
- MD5_Init(&rc4_ctx->head);
- MD5_Update(&rc4_ctx->head, hmac_key, sizeof(hmac_key));
- for (i = 0; i < sizeof(hmac_key); i++) {
- hmac_key[i] ^= 0x36 ^ 0x5c;
- }
- MD5_Init(&rc4_ctx->tail);
- MD5_Update(&rc4_ctx->tail, hmac_key, sizeof(hmac_key));
-
- rc4_ctx->tag_len = tag_len;
- ctx->aead_state = rc4_ctx;
-
- return 1;
-}
-
-static void aead_rc4_md5_tls_cleanup(EVP_AEAD_CTX *ctx) {
- struct aead_rc4_md5_tls_ctx *rc4_ctx = ctx->aead_state;
- OPENSSL_cleanse(rc4_ctx, sizeof(struct aead_rc4_md5_tls_ctx));
- OPENSSL_free(rc4_ctx);
-}
-
-#if !defined(OPENSSL_NO_ASM) && defined(OPENSSL_X86_64)
-#define STITCHED_CALL
-
-/* rc4_md5_enc is defined in rc4_md5-x86_64.pl */
-void rc4_md5_enc(RC4_KEY *key, const void *in0, void *out, MD5_CTX *ctx,
- const void *inp, size_t blocks);
-#endif
-
-static int aead_rc4_md5_tls_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) {
- struct aead_rc4_md5_tls_ctx *rc4_ctx = ctx->aead_state;
- MD5_CTX md;
-#if defined(STITCHED_CALL)
- size_t rc4_off, md5_off, blocks;
-#else
- const size_t rc4_off = 0;
- const size_t md5_off = 0;
-#endif
- uint8_t digest[MD5_DIGEST_LENGTH];
-
- if (in_len + rc4_ctx->tag_len < in_len) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE);
- return 0;
- }
-
- if (nonce_len != 0) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_IV_TOO_LARGE);
- return 0;
- }
-
- if (max_out_len < in_len + rc4_ctx->tag_len) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- if (nonce_len != 0) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE);
- return 0;
- }
-
- memcpy(&md, &rc4_ctx->head, sizeof(MD5_CTX));
- /* The MAC's payload begins with the additional data. See
- * https://tools.ietf.org/html/rfc5246#section-6.2.3.1 */
- MD5_Update(&md, ad, ad_len);
-
- /* To allow for CBC mode which changes cipher length, |ad| doesn't include the
- * length for legacy ciphers. */
- uint8_t ad_extra[2];
- ad_extra[0] = (uint8_t)(in_len >> 8);
- ad_extra[1] = (uint8_t)(in_len & 0xff);
- MD5_Update(&md, ad_extra, sizeof(ad_extra));
-
-#if defined(STITCHED_CALL)
- /* 32 is $MOD from rc4_md5-x86_64.pl. */
- rc4_off = 32 - 1 - (rc4_ctx->rc4.x & (32 - 1));
- md5_off = MD5_CBLOCK - md.num;
- /* Ensure RC4 is behind MD5. */
- if (rc4_off > md5_off) {
- md5_off += MD5_CBLOCK;
- }
- assert(md5_off >= rc4_off);
-
- if (in_len > md5_off && (blocks = (in_len - md5_off) / MD5_CBLOCK) &&
- (OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
- /* Process the initial portions of the plaintext normally. */
- MD5_Update(&md, in, md5_off);
- RC4(&rc4_ctx->rc4, rc4_off, in, out);
-
- /* Process the next |blocks| blocks of plaintext with stitched routines. */
- rc4_md5_enc(&rc4_ctx->rc4, in + rc4_off, out + rc4_off, &md, in + md5_off,
- blocks);
- blocks *= MD5_CBLOCK;
- rc4_off += blocks;
- md5_off += blocks;
- md.Nh += blocks >> 29;
- md.Nl += blocks <<= 3;
- if (md.Nl < (unsigned int)blocks) {
- md.Nh++;
- }
- } else {
- rc4_off = 0;
- md5_off = 0;
- }
-#endif
- /* Finish computing the MAC. */
- MD5_Update(&md, in + md5_off, in_len - md5_off);
- MD5_Final(digest, &md);
-
- memcpy(&md, &rc4_ctx->tail, sizeof(MD5_CTX));
- MD5_Update(&md, digest, sizeof(digest));
- if (rc4_ctx->tag_len == MD5_DIGEST_LENGTH) {
- MD5_Final(out + in_len, &md);
- } else {
- MD5_Final(digest, &md);
- memcpy(out + in_len, digest, rc4_ctx->tag_len);
- }
-
- /* Encrypt the remainder of the plaintext and the MAC. */
- RC4(&rc4_ctx->rc4, in_len - rc4_off, in + rc4_off, out + rc4_off);
- RC4(&rc4_ctx->rc4, MD5_DIGEST_LENGTH, out + in_len, out + in_len);
-
- *out_len = in_len + rc4_ctx->tag_len;
- return 1;
-}
-
-static int aead_rc4_md5_tls_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) {
- struct aead_rc4_md5_tls_ctx *rc4_ctx = ctx->aead_state;
- MD5_CTX md;
- size_t plaintext_len;
-#if defined(STITCHED_CALL)
- unsigned int l;
- size_t rc4_off, md5_off, blocks;
- extern unsigned int OPENSSL_ia32cap_P[];
-#else
- const size_t rc4_off = 0;
- const size_t md5_off = 0;
-#endif
- uint8_t digest[MD5_DIGEST_LENGTH];
-
- if (in_len < rc4_ctx->tag_len) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT);
- return 0;
- }
-
- plaintext_len = in_len - rc4_ctx->tag_len;
-
- if (nonce_len != 0) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_TOO_LARGE);
- return 0;
- }
-
- if (max_out_len < in_len) {
- /* This requires that the caller provide space for the MAC, even though it
- * will always be removed on return. */
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BUFFER_TOO_SMALL);
- return 0;
- }
-
- memcpy(&md, &rc4_ctx->head, sizeof(MD5_CTX));
- /* The MAC's payload begins with the additional data. See
- * https://tools.ietf.org/html/rfc5246#section-6.2.3.1 */
- MD5_Update(&md, ad, ad_len);
-
- /* To allow for CBC mode which changes cipher length, |ad| doesn't include the
- * length for legacy ciphers. */
- uint8_t ad_extra[2];
- ad_extra[0] = (uint8_t)(plaintext_len >> 8);
- ad_extra[1] = (uint8_t)(plaintext_len & 0xff);
- MD5_Update(&md, ad_extra, sizeof(ad_extra));
-
-#if defined(STITCHED_CALL)
- rc4_off = 32 - 1 - (rc4_ctx->rc4.x & (32 - 1));
- md5_off = MD5_CBLOCK - md.num;
- /* Ensure MD5 is a full block behind RC4 so it has plaintext to operate on in
- * both normal and stitched routines. */
- if (md5_off > rc4_off) {
- rc4_off += 2 * MD5_CBLOCK;
- } else {
- rc4_off += MD5_CBLOCK;
- }
-
- if (in_len > rc4_off && (blocks = (in_len - rc4_off) / MD5_CBLOCK) &&
- (OPENSSL_ia32cap_P[0] & (1 << 20)) == 0) {
- /* Decrypt the initial portion of the ciphertext and digest the plaintext
- * normally. */
- RC4(&rc4_ctx->rc4, rc4_off, in, out);
- MD5_Update(&md, out, md5_off);
-
- /* Decrypt and digest the next |blocks| blocks of ciphertext with the
- * stitched routines. */
- rc4_md5_enc(&rc4_ctx->rc4, in + rc4_off, out + rc4_off, &md, out + md5_off,
- blocks);
- blocks *= MD5_CBLOCK;
- rc4_off += blocks;
- md5_off += blocks;
- l = (md.Nl + (blocks << 3)) & 0xffffffffU;
- if (l < md.Nl) {
- md.Nh++;
- }
- md.Nl = l;
- md.Nh += blocks >> 29;
- } else {
- md5_off = 0;
- rc4_off = 0;
- }
-#endif
-
- /* Process the remainder of the input. */
- RC4(&rc4_ctx->rc4, in_len - rc4_off, in + rc4_off, out + rc4_off);
- MD5_Update(&md, out + md5_off, plaintext_len - md5_off);
- MD5_Final(digest, &md);
-
- /* Calculate HMAC and verify it */
- memcpy(&md, &rc4_ctx->tail, sizeof(MD5_CTX));
- MD5_Update(&md, digest, MD5_DIGEST_LENGTH);
- MD5_Final(digest, &md);
-
- if (CRYPTO_memcmp(out + plaintext_len, digest, rc4_ctx->tag_len)) {
- OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_DECRYPT);
- return 0;
- }
-
- *out_len = plaintext_len;
- return 1;
-}
-
-static int aead_rc4_md5_tls_get_rc4_state(const EVP_AEAD_CTX *ctx,
- const RC4_KEY **out_key) {
- struct aead_rc4_md5_tls_ctx *rc4_ctx = ctx->aead_state;
- *out_key = &rc4_ctx->rc4;
- return 1;
-}
-
-static const EVP_AEAD aead_rc4_md5_tls = {
- 16 + MD5_DIGEST_LENGTH, /* key len (RC4 + MD5) */
- 0, /* nonce len */
- MD5_DIGEST_LENGTH, /* overhead */
- MD5_DIGEST_LENGTH, /* max tag length */
- aead_rc4_md5_tls_init,
- NULL, /* init_with_direction */
- aead_rc4_md5_tls_cleanup,
- aead_rc4_md5_tls_seal,
- aead_rc4_md5_tls_open,
- aead_rc4_md5_tls_get_rc4_state,
-};
-
-const EVP_AEAD *EVP_aead_rc4_md5_tls(void) { return &aead_rc4_md5_tls; }
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-06 13:54:36 +0000