From e9ada863a7b3e81f5d2b1e3bdd2305da902a87f5 Mon Sep 17 00:00:00 2001 From: Adam Langley Date: Mon, 11 May 2015 17:20:37 -0700 Subject: external/boringssl: bump revision. This change bumps the BoringSSL revision to the current tip-of-tree. Change-Id: I91d5bf467e16e8d86cb19a4de873985f524e5faa --- src/include/openssl/cmac.h | 76 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 src/include/openssl/cmac.h (limited to 'src/include/openssl/cmac.h') diff --git a/src/include/openssl/cmac.h b/src/include/openssl/cmac.h new file mode 100644 index 0000000..183f41b --- /dev/null +++ b/src/include/openssl/cmac.h @@ -0,0 +1,76 @@ +/* Copyright (c) 2015, Google Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ + +#ifndef OPENSSL_HEADER_CMAC_H +#define OPENSSL_HEADER_CMAC_H + +#include + +#if defined(__cplusplus) +extern "C" { +#endif + + +/* CMAC. + * + * CMAC is a MAC based on AES-CBC and defined in + * https://tools.ietf.org/html/rfc4493#section-2.3. */ + + +/* One-shot functions. */ + +/* AES_CMAC calculates the 16-byte, CMAC authenticator of |in_len| bytes of + * |in| and writes it to |out|. The |key_len| may be 16 or 32 bytes to select + * between AES-128 and AES-256. It returns one on success or zero on error. */ +OPENSSL_EXPORT int AES_CMAC(uint8_t out[16], const uint8_t *key, size_t key_len, + const uint8_t *in, size_t in_len); + + +/* Incremental interface. */ + +/* CMAC_CTX_new allocates a fresh |CMAC_CTX| and returns it, or NULL on + * error. */ +OPENSSL_EXPORT CMAC_CTX *CMAC_CTX_new(void); + +/* CMAC_CTX_free frees a |CMAC_CTX|. */ +OPENSSL_EXPORT void CMAC_CTX_free(CMAC_CTX *ctx); + +/* CMAC_Init configures |ctx| to use the given |key| and |cipher|. The CMAC RFC + * only specifies the use of AES-128 thus |key_len| should be 16 and |cipher| + * should be |EVP_aes_128_cbc()|. However, this implementation also supports + * AES-256 by setting |key_len| to 32 and |cipher| to |EVP_aes_256_cbc()|. The + * |engine| argument is ignored. + * + * It returns one on success or zero on error. */ +OPENSSL_EXPORT int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t key_len, + const EVP_CIPHER *cipher, ENGINE *engine); + + +/* CMAC_Reset resets |ctx| so that a fresh message can be authenticated. */ +OPENSSL_EXPORT int CMAC_Reset(CMAC_CTX *ctx); + +/* CMAC_Update processes |in_len| bytes of message from |in|. It returns one on + * success or zero on error. */ +OPENSSL_EXPORT int CMAC_Update(CMAC_CTX *ctx, const uint8_t *in, size_t in_len); + +/* CMAC_Final sets |*out_len| to 16 and, if |out| is not NULL, writes 16 bytes + * of authenticator to it. It returns one on success or zero on error. */ +OPENSSL_EXPORT int CMAC_Final(CMAC_CTX *ctx, uint8_t *out, size_t *out_len); + + +#if defined(__cplusplus) +} /* extern C */ +#endif + +#endif /* OPENSSL_HEADER_CBC_H */ -- cgit v1.1