| /* |
| * Copyright (c) 2017, The OpenThread Authors. |
| * 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. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER 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. |
| */ |
| |
| #ifndef MBEDTLS_SHA256_ALT_H |
| #define MBEDTLS_SHA256_ALT_H |
| |
| #ifdef MBEDTLS_SHA256_ALT |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief SHA-256 context structure |
| */ |
| typedef union |
| { |
| struct |
| { |
| uint32_t total[2]; /*!< number of bytes processed */ |
| uint32_t state[8]; /*!< intermediate digest state */ |
| unsigned char buffer[64]; /*!< data block being processed */ |
| int is224; /*!< 0 => SHA-256, else SHA-224 */ |
| }; |
| uint8_t reserved[256]; |
| } |
| mbedtls_sha256_context; |
| |
| /** |
| * @brief Initialize SHA-256 context |
| * |
| * @param [in,out] ctx SHA-256 context to be initialized |
| */ |
| void mbedtls_sha256_init(mbedtls_sha256_context *ctx); |
| |
| /** |
| * @brief Clear SHA-256 context |
| * |
| * @param [in,out] ctx SHA-256 context to be cleared |
| */ |
| void mbedtls_sha256_free(mbedtls_sha256_context *ctx); |
| |
| /** |
| * @brief Clone (the state of) a SHA-256 context |
| * |
| * @param [out] dst The destination context |
| * @param [in] src The context to be cloned |
| */ |
| void mbedtls_sha256_clone(mbedtls_sha256_context *dst, |
| const mbedtls_sha256_context *src); |
| |
| /** |
| * @brief SHA-256 context setup |
| * |
| * @param [in,out] ctx context to be initialized |
| * @param [in] is224 0 = use SHA256, 1 = use SHA224 |
| */ |
| void mbedtls_sha256_starts(mbedtls_sha256_context *ctx, int is224); |
| |
| /** |
| * @brief SHA-256 process buffer |
| * |
| * @param [in,out] ctx SHA-256 context |
| * @param [in] input buffer holding the data |
| * @param [in] ilen length of the input data |
| */ |
| void mbedtls_sha256_update(mbedtls_sha256_context *ctx, const unsigned char *input, size_t ilen); |
| |
| /** |
| * @brief SHA-256 final digest |
| * |
| * @param [in,out] ctx SHA-256 context |
| * @param [out] output SHA-224/256 checksum result |
| */ |
| void mbedtls_sha256_finish(mbedtls_sha256_context *ctx, unsigned char output[32]); |
| |
| /* Internal use */ |
| void mbedtls_sha256_process(mbedtls_sha256_context *ctx, const unsigned char data[64]); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* MBEDTLS_SHA256_ALT */ |
| |
| /* MBEDTLS_SHA256_ALT was used to redifine context structure. Undefine it now to enable default mbedTLS implementation. */ |
| #undef MBEDTLS_SHA256_ALT |
| |
| #endif /* MBEDTLS_SHA256_ALT_H */ |