diff options
author | Lukacs T. Berki <lberki@google.com> | 2016-05-10 14:48:31 +0200 |
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committer | Lukacs T. Berki <lberki@google.com> | 2016-05-10 14:49:11 +0200 |
commit | aae3e40985d15a6311d2a336cd99fd8c2368bd78 (patch) | |
tree | 2770ee443ba675c2da555a91303c8910b4b7a9ea /third_party/boringssl/src/crypto/cipher/e_rc4.c | |
parent | 2e172693c27f3efc95ed163e43a9f0a7a6fb4017 (diff) |
Remove BoringSSL from third_party .
We don't need it (gRPC is only used on the loopback interface), and the less dependencies, the better.
Change-Id: If5bc27812c9e8849618f349a448a7aeb920f2975
Diffstat (limited to 'third_party/boringssl/src/crypto/cipher/e_rc4.c')
-rw-r--r-- | third_party/boringssl/src/crypto/cipher/e_rc4.c | 397 |
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; } |