Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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91 lines
3.1 KiB
91 lines
3.1 KiB
/* Copyright (c) 2015, Google Inc. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
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#ifndef OPENSSL_HEADER_CMAC_H |
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#define OPENSSL_HEADER_CMAC_H |
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#include <openssl/base.h> |
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#if defined(__cplusplus) |
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extern "C" { |
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#endif |
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// CMAC. |
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// |
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// CMAC is a MAC based on AES-CBC and defined in |
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// https://tools.ietf.org/html/rfc4493#section-2.3. |
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// One-shot functions. |
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// AES_CMAC calculates the 16-byte, CMAC authenticator of |in_len| bytes of |
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// |in| and writes it to |out|. The |key_len| may be 16 or 32 bytes to select |
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// between AES-128 and AES-256. It returns one on success or zero on error. |
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OPENSSL_EXPORT int AES_CMAC(uint8_t out[16], const uint8_t *key, size_t key_len, |
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const uint8_t *in, size_t in_len); |
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// Incremental interface. |
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// CMAC_CTX_new allocates a fresh |CMAC_CTX| and returns it, or NULL on |
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// error. |
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OPENSSL_EXPORT CMAC_CTX *CMAC_CTX_new(void); |
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// CMAC_CTX_free frees a |CMAC_CTX|. |
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OPENSSL_EXPORT void CMAC_CTX_free(CMAC_CTX *ctx); |
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// CMAC_CTX_copy sets |out| to be a duplicate of the current state |in|. It |
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// returns one on success and zero on error. |
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OPENSSL_EXPORT int CMAC_CTX_copy(CMAC_CTX *out, const CMAC_CTX *in); |
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// CMAC_Init configures |ctx| to use the given |key| and |cipher|. The CMAC RFC |
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// only specifies the use of AES-128 thus |key_len| should be 16 and |cipher| |
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// should be |EVP_aes_128_cbc()|. However, this implementation also supports |
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// AES-256 by setting |key_len| to 32 and |cipher| to |EVP_aes_256_cbc()|. The |
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// |engine| argument is ignored. |
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// |
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// It returns one on success or zero on error. |
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OPENSSL_EXPORT int CMAC_Init(CMAC_CTX *ctx, const void *key, size_t key_len, |
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const EVP_CIPHER *cipher, ENGINE *engine); |
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// CMAC_Reset resets |ctx| so that a fresh message can be authenticated. |
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OPENSSL_EXPORT int CMAC_Reset(CMAC_CTX *ctx); |
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// CMAC_Update processes |in_len| bytes of message from |in|. It returns one on |
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// success or zero on error. |
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OPENSSL_EXPORT int CMAC_Update(CMAC_CTX *ctx, const uint8_t *in, size_t in_len); |
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// CMAC_Final sets |*out_len| to 16 and, if |out| is not NULL, writes 16 bytes |
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// of authenticator to it. It returns one on success or zero on error. |
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OPENSSL_EXPORT int CMAC_Final(CMAC_CTX *ctx, uint8_t *out, size_t *out_len); |
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#if defined(__cplusplus) |
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} // extern C |
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extern "C++" { |
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BSSL_NAMESPACE_BEGIN |
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BORINGSSL_MAKE_DELETER(CMAC_CTX, CMAC_CTX_free) |
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BSSL_NAMESPACE_END |
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} // extern C++ |
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#endif |
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#endif // OPENSSL_HEADER_CMAC_H
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