X-Git-Url: https://code.wpia.club/?a=blobdiff_plain;ds=sidebyside;f=lib%2Fopenssl%2Fcrypto%2Fcmac%2Fcmac.c;h=c4f13a069f32b0bd91f463fd40d416222aa3a147;hb=HEAD;hp=8b72b096813c61c032f76270b45670f1a134b69e;hpb=156855b7e12c3a0254590da514b0d0e8efe469f4;p=cassiopeia.git diff --git a/lib/openssl/crypto/cmac/cmac.c b/lib/openssl/crypto/cmac/cmac.c index 8b72b09..c4f13a0 100644 --- a/lib/openssl/crypto/cmac/cmac.c +++ b/lib/openssl/crypto/cmac/cmac.c @@ -1,308 +1,223 @@ -/* crypto/cmac/cmac.c */ -/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL - * project. - */ -/* ==================================================================== - * Copyright (c) 2010 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. +/* + * Copyright 2010-2016 The OpenSSL Project Authors. All Rights Reserved. * - * 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. - * ==================================================================== + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include #include #include -#include "cryptlib.h" +#include "internal/cryptlib.h" #include -#ifdef OPENSSL_FIPS -#include -#endif +struct CMAC_CTX_st { + /* Cipher context to use */ + EVP_CIPHER_CTX *cctx; + /* Keys k1 and k2 */ + unsigned char k1[EVP_MAX_BLOCK_LENGTH]; + unsigned char k2[EVP_MAX_BLOCK_LENGTH]; + /* Temporary block */ + unsigned char tbl[EVP_MAX_BLOCK_LENGTH]; + /* Last (possibly partial) block */ + unsigned char last_block[EVP_MAX_BLOCK_LENGTH]; + /* Number of bytes in last block: -1 means context not initialised */ + int nlast_block; +}; -struct CMAC_CTX_st - { - /* Cipher context to use */ - EVP_CIPHER_CTX cctx; - /* Keys k1 and k2 */ - unsigned char k1[EVP_MAX_BLOCK_LENGTH]; - unsigned char k2[EVP_MAX_BLOCK_LENGTH]; - /* Temporary block */ - unsigned char tbl[EVP_MAX_BLOCK_LENGTH]; - /* Last (possibly partial) block */ - unsigned char last_block[EVP_MAX_BLOCK_LENGTH]; - /* Number of bytes in last block: -1 means context not initialised */ - int nlast_block; - }; +/* Make temporary keys K1 and K2 */ +static void make_kn(unsigned char *k1, const unsigned char *l, int bl) +{ + int i; + unsigned char c = l[0], carry = c >> 7, cnext; -/* Make temporary keys K1 and K2 */ + /* Shift block to left, including carry */ + for (i = 0; i < bl - 1; i++, c = cnext) + k1[i] = (c << 1) | ((cnext = l[i + 1]) >> 7); -static void make_kn(unsigned char *k1, unsigned char *l, int bl) - { - int i; - /* Shift block to left, including carry */ - for (i = 0; i < bl; i++) - { - k1[i] = l[i] << 1; - if (i < bl - 1 && l[i + 1] & 0x80) - k1[i] |= 1; - } - /* If MSB set fixup with R */ - if (l[0] & 0x80) - k1[bl - 1] ^= bl == 16 ? 0x87 : 0x1b; - } + /* If MSB set fixup with R */ + k1[i] = (c << 1) ^ ((0 - carry) & (bl == 16 ? 0x87 : 0x1b)); +} CMAC_CTX *CMAC_CTX_new(void) - { - CMAC_CTX *ctx; - ctx = OPENSSL_malloc(sizeof(CMAC_CTX)); - if (!ctx) - return NULL; - EVP_CIPHER_CTX_init(&ctx->cctx); - ctx->nlast_block = -1; - return ctx; - } +{ + CMAC_CTX *ctx; + + ctx = OPENSSL_malloc(sizeof(*ctx)); + if (ctx == NULL) + return NULL; + ctx->cctx = EVP_CIPHER_CTX_new(); + if (ctx->cctx == NULL) { + OPENSSL_free(ctx); + return NULL; + } + ctx->nlast_block = -1; + return ctx; +} void CMAC_CTX_cleanup(CMAC_CTX *ctx) - { -#ifdef OPENSSL_FIPS - if (FIPS_mode() && !ctx->cctx.engine) - { - FIPS_cmac_ctx_cleanup(ctx); - return; - } -#endif - EVP_CIPHER_CTX_cleanup(&ctx->cctx); - OPENSSL_cleanse(ctx->tbl, EVP_MAX_BLOCK_LENGTH); - OPENSSL_cleanse(ctx->k1, EVP_MAX_BLOCK_LENGTH); - OPENSSL_cleanse(ctx->k2, EVP_MAX_BLOCK_LENGTH); - OPENSSL_cleanse(ctx->last_block, EVP_MAX_BLOCK_LENGTH); - ctx->nlast_block = -1; - } +{ + EVP_CIPHER_CTX_free(ctx->cctx); + OPENSSL_cleanse(ctx->tbl, EVP_MAX_BLOCK_LENGTH); + OPENSSL_cleanse(ctx->k1, EVP_MAX_BLOCK_LENGTH); + OPENSSL_cleanse(ctx->k2, EVP_MAX_BLOCK_LENGTH); + OPENSSL_cleanse(ctx->last_block, EVP_MAX_BLOCK_LENGTH); + ctx->nlast_block = -1; +} EVP_CIPHER_CTX *CMAC_CTX_get0_cipher_ctx(CMAC_CTX *ctx) - { - return &ctx->cctx; - } +{ + return ctx->cctx; +} void CMAC_CTX_free(CMAC_CTX *ctx) - { - CMAC_CTX_cleanup(ctx); - OPENSSL_free(ctx); - } +{ + if (!ctx) + return; + CMAC_CTX_cleanup(ctx); + OPENSSL_free(ctx); +} int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in) - { - int bl; - if (in->nlast_block == -1) - return 0; - if (!EVP_CIPHER_CTX_copy(&out->cctx, &in->cctx)) - return 0; - bl = EVP_CIPHER_CTX_block_size(&in->cctx); - memcpy(out->k1, in->k1, bl); - memcpy(out->k2, in->k2, bl); - memcpy(out->tbl, in->tbl, bl); - memcpy(out->last_block, in->last_block, bl); - out->nlast_block = in->nlast_block; - return 1; - } - -int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen, - const EVP_CIPHER *cipher, ENGINE *impl) - { - static unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH]; -#ifdef OPENSSL_FIPS - if (FIPS_mode()) - { - /* If we have an ENGINE need to allow non FIPS */ - if ((impl || ctx->cctx.engine) - && !(ctx->cctx.flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW)) - - { - EVPerr(EVP_F_CMAC_INIT, EVP_R_DISABLED_FOR_FIPS); - return 0; - } - /* Other algorithm blocking will be done in FIPS_cmac_init, - * via FIPS_cipherinit(). - */ - if (!impl && !ctx->cctx.engine) - return FIPS_cmac_init(ctx, key, keylen, cipher, NULL); - } -#endif - /* All zeros means restart */ - if (!key && !cipher && !impl && keylen == 0) - { - /* Not initialised */ - if (ctx->nlast_block == -1) - return 0; - if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv)) - return 0; - memset(ctx->tbl, 0, EVP_CIPHER_CTX_block_size(&ctx->cctx)); - ctx->nlast_block = 0; - return 1; - } - /* Initialiase context */ - if (cipher && !EVP_EncryptInit_ex(&ctx->cctx, cipher, impl, NULL, NULL)) - return 0; - /* Non-NULL key means initialisation complete */ - if (key) - { - int bl; - if (!EVP_CIPHER_CTX_cipher(&ctx->cctx)) - return 0; - if (!EVP_CIPHER_CTX_set_key_length(&ctx->cctx, keylen)) - return 0; - if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, key, zero_iv)) - return 0; - bl = EVP_CIPHER_CTX_block_size(&ctx->cctx); - if (!EVP_Cipher(&ctx->cctx, ctx->tbl, zero_iv, bl)) - return 0; - make_kn(ctx->k1, ctx->tbl, bl); - make_kn(ctx->k2, ctx->k1, bl); - OPENSSL_cleanse(ctx->tbl, bl); - /* Reset context again ready for first data block */ - if (!EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, zero_iv)) - return 0; - /* Zero tbl so resume works */ - memset(ctx->tbl, 0, bl); - ctx->nlast_block = 0; - } - return 1; - } +{ + int bl; + if (in->nlast_block == -1) + return 0; + if (!EVP_CIPHER_CTX_copy(out->cctx, in->cctx)) + return 0; + bl = EVP_CIPHER_CTX_block_size(in->cctx); + memcpy(out->k1, in->k1, bl); + memcpy(out->k2, in->k2, bl); + memcpy(out->tbl, in->tbl, bl); + memcpy(out->last_block, in->last_block, bl); + out->nlast_block = in->nlast_block; + return 1; +} + +int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t keylen, + const EVP_CIPHER *cipher, ENGINE *impl) +{ + static const unsigned char zero_iv[EVP_MAX_BLOCK_LENGTH] = { 0 }; + /* All zeros means restart */ + if (!key && !cipher && !impl && keylen == 0) { + /* Not initialised */ + if (ctx->nlast_block == -1) + return 0; + if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, zero_iv)) + return 0; + memset(ctx->tbl, 0, EVP_CIPHER_CTX_block_size(ctx->cctx)); + ctx->nlast_block = 0; + return 1; + } + /* Initialise context */ + if (cipher && !EVP_EncryptInit_ex(ctx->cctx, cipher, impl, NULL, NULL)) + return 0; + /* Non-NULL key means initialisation complete */ + if (key) { + int bl; + if (!EVP_CIPHER_CTX_cipher(ctx->cctx)) + return 0; + if (!EVP_CIPHER_CTX_set_key_length(ctx->cctx, keylen)) + return 0; + if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, key, zero_iv)) + return 0; + bl = EVP_CIPHER_CTX_block_size(ctx->cctx); + if (!EVP_Cipher(ctx->cctx, ctx->tbl, zero_iv, bl)) + return 0; + make_kn(ctx->k1, ctx->tbl, bl); + make_kn(ctx->k2, ctx->k1, bl); + OPENSSL_cleanse(ctx->tbl, bl); + /* Reset context again ready for first data block */ + if (!EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, zero_iv)) + return 0; + /* Zero tbl so resume works */ + memset(ctx->tbl, 0, bl); + ctx->nlast_block = 0; + } + return 1; +} int CMAC_Update(CMAC_CTX *ctx, const void *in, size_t dlen) - { - const unsigned char *data = in; - size_t bl; -#ifdef OPENSSL_FIPS - if (FIPS_mode() && !ctx->cctx.engine) - return FIPS_cmac_update(ctx, in, dlen); -#endif - if (ctx->nlast_block == -1) - return 0; - if (dlen == 0) - return 1; - bl = EVP_CIPHER_CTX_block_size(&ctx->cctx); - /* Copy into partial block if we need to */ - if (ctx->nlast_block > 0) - { - size_t nleft; - nleft = bl - ctx->nlast_block; - if (dlen < nleft) - nleft = dlen; - memcpy(ctx->last_block + ctx->nlast_block, data, nleft); - dlen -= nleft; - ctx->nlast_block += nleft; - /* If no more to process return */ - if (dlen == 0) - return 1; - data += nleft; - /* Else not final block so encrypt it */ - if (!EVP_Cipher(&ctx->cctx, ctx->tbl, ctx->last_block,bl)) - return 0; - } - /* Encrypt all but one of the complete blocks left */ - while(dlen > bl) - { - if (!EVP_Cipher(&ctx->cctx, ctx->tbl, data, bl)) - return 0; - dlen -= bl; - data += bl; - } - /* Copy any data left to last block buffer */ - memcpy(ctx->last_block, data, dlen); - ctx->nlast_block = dlen; - return 1; - - } +{ + const unsigned char *data = in; + size_t bl; + if (ctx->nlast_block == -1) + return 0; + if (dlen == 0) + return 1; + bl = EVP_CIPHER_CTX_block_size(ctx->cctx); + /* Copy into partial block if we need to */ + if (ctx->nlast_block > 0) { + size_t nleft; + nleft = bl - ctx->nlast_block; + if (dlen < nleft) + nleft = dlen; + memcpy(ctx->last_block + ctx->nlast_block, data, nleft); + dlen -= nleft; + ctx->nlast_block += nleft; + /* If no more to process return */ + if (dlen == 0) + return 1; + data += nleft; + /* Else not final block so encrypt it */ + if (!EVP_Cipher(ctx->cctx, ctx->tbl, ctx->last_block, bl)) + return 0; + } + /* Encrypt all but one of the complete blocks left */ + while (dlen > bl) { + if (!EVP_Cipher(ctx->cctx, ctx->tbl, data, bl)) + return 0; + dlen -= bl; + data += bl; + } + /* Copy any data left to last block buffer */ + memcpy(ctx->last_block, data, dlen); + ctx->nlast_block = dlen; + return 1; + +} int CMAC_Final(CMAC_CTX *ctx, unsigned char *out, size_t *poutlen) - { - int i, bl, lb; -#ifdef OPENSSL_FIPS - if (FIPS_mode() && !ctx->cctx.engine) - return FIPS_cmac_final(ctx, out, poutlen); -#endif - if (ctx->nlast_block == -1) - return 0; - bl = EVP_CIPHER_CTX_block_size(&ctx->cctx); - *poutlen = (size_t)bl; - if (!out) - return 1; - lb = ctx->nlast_block; - /* Is last block complete? */ - if (lb == bl) - { - for (i = 0; i < bl; i++) - out[i] = ctx->last_block[i] ^ ctx->k1[i]; - } - else - { - ctx->last_block[lb] = 0x80; - if (bl - lb > 1) - memset(ctx->last_block + lb + 1, 0, bl - lb - 1); - for (i = 0; i < bl; i++) - out[i] = ctx->last_block[i] ^ ctx->k2[i]; - } - if (!EVP_Cipher(&ctx->cctx, out, out, bl)) - { - OPENSSL_cleanse(out, bl); - return 0; - } - return 1; - } +{ + int i, bl, lb; + if (ctx->nlast_block == -1) + return 0; + bl = EVP_CIPHER_CTX_block_size(ctx->cctx); + *poutlen = (size_t)bl; + if (!out) + return 1; + lb = ctx->nlast_block; + /* Is last block complete? */ + if (lb == bl) { + for (i = 0; i < bl; i++) + out[i] = ctx->last_block[i] ^ ctx->k1[i]; + } else { + ctx->last_block[lb] = 0x80; + if (bl - lb > 1) + memset(ctx->last_block + lb + 1, 0, bl - lb - 1); + for (i = 0; i < bl; i++) + out[i] = ctx->last_block[i] ^ ctx->k2[i]; + } + if (!EVP_Cipher(ctx->cctx, out, out, bl)) { + OPENSSL_cleanse(out, bl); + return 0; + } + return 1; +} int CMAC_resume(CMAC_CTX *ctx) - { - if (ctx->nlast_block == -1) - return 0; - /* The buffer "tbl" containes the last fully encrypted block - * which is the last IV (or all zeroes if no last encrypted block). - * The last block has not been modified since CMAC_final(). - * So reinitliasing using the last decrypted block will allow - * CMAC to continue after calling CMAC_Final(). - */ - return EVP_EncryptInit_ex(&ctx->cctx, NULL, NULL, NULL, ctx->tbl); - } +{ + if (ctx->nlast_block == -1) + return 0; + /* + * The buffer "tbl" contains the last fully encrypted block which is the + * last IV (or all zeroes if no last encrypted block). The last block has + * not been modified since CMAC_final(). So reinitialising using the last + * decrypted block will allow CMAC to continue after calling + * CMAC_Final(). + */ + return EVP_EncryptInit_ex(ctx->cctx, NULL, NULL, NULL, ctx->tbl); +}