/* ==================================================================== * 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 * [email protected]. * * 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/cmac.h> #include <assert.h> #include <limits.h> #include <string.h> #include <openssl/aes.h> #include <openssl/cipher.h> #include <openssl/mem.h> #include "../../internal.h" #include "../service_indicator/internal.h" struct cmac_ctx_st { … }; static void CMAC_CTX_init(CMAC_CTX *ctx) { … } static void CMAC_CTX_cleanup(CMAC_CTX *ctx) { … } int AES_CMAC(uint8_t out[16], const uint8_t *key, size_t key_len, const uint8_t *in, size_t in_len) { … } CMAC_CTX *CMAC_CTX_new(void) { … } void CMAC_CTX_free(CMAC_CTX *ctx) { … } int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in) { … } // binary_field_mul_x_128 treats the 128 bits at |in| as an element of GF(2¹²⁸) // with a hard-coded reduction polynomial and sets |out| as x times the input. // // See https://tools.ietf.org/html/rfc4493#section-2.3 static void binary_field_mul_x_128(uint8_t out[16], const uint8_t in[16]) { … } // binary_field_mul_x_64 behaves like |binary_field_mul_x_128| but acts on an // element of GF(2⁶⁴). // // See https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-38b.pdf static void binary_field_mul_x_64(uint8_t out[8], const uint8_t in[8]) { … } static const uint8_t kZeroIV[AES_BLOCK_SIZE] = …; int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t key_len, const EVP_CIPHER *cipher, ENGINE *engine) { … } int CMAC_Reset(CMAC_CTX *ctx) { … } int CMAC_Update(CMAC_CTX *ctx, const uint8_t *in, size_t in_len) { … } int CMAC_Final(CMAC_CTX *ctx, uint8_t *out, size_t *out_len) { … }
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