网站建设怎么做?,微信网站制作合同,云平台网站叫什么,百度搜题文章目录 openssl3.2 - 官方demo学习 - mac - hmac-sha512.c概述笔记END openssl3.2 - 官方demo学习 - mac - hmac-sha512.c
概述
MAC算法为HMAC, 设置参数(摘要算法为SHA3-512), 用key初始化, 对明文做MAC数据.
笔记
/*!
\file hmac-sha512.c
\note
openssl3.2 - 官方demo… 文章目录 openssl3.2 - 官方demo学习 - mac - hmac-sha512.c概述笔记END openssl3.2 - 官方demo学习 - mac - hmac-sha512.c
概述
MAC算法为HMAC, 设置参数(摘要算法为SHA3-512), 用key初始化, 对明文做MAC数据.
笔记
/*!
\file hmac-sha512.c
\note
openssl3.2 - 官方demo学习 - mac - hmac-sha512.c
MAC算法为HMAC, 设置参数(摘要算法为SHA3-512), 用key初始化, 对明文做MAC数据.
*//*-* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.** Licensed under the Apache License 2.0 (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*//** Example of using EVP_MAC_ methods to calculate* a HMAC of static buffers*/#include string.h
#include stdio.h
#include openssl/crypto.h
#include openssl/core_names.h
#include openssl/err.h
#include openssl/evp.h
#include openssl/hmac.h
#include openssl/params.h#include my_openSSL_lib.h/** Hard coding the key into an application is very bad.* It is done here solely for educational purposes.*/
static unsigned char key[] {0x25, 0xfd, 0x12, 0x99, 0xdf, 0xad, 0x1a, 0x03,0x0a, 0x81, 0x3c, 0x2d, 0xcc, 0x05, 0xd1, 0x5c,0x17, 0x7a, 0x36, 0x73, 0x17, 0xef, 0x41, 0x75,0x71, 0x18, 0xe0, 0x1a, 0xda, 0x99, 0xc3, 0x61,0x38, 0xb5, 0xb1, 0xe0, 0x82, 0x2c, 0x70, 0xa4,0xc0, 0x8e, 0x5e, 0xf9, 0x93, 0x9f, 0xcf, 0xf7,0x32, 0x4d, 0x0c, 0xbd, 0x31, 0x12, 0x0f, 0x9a,0x15, 0xee, 0x82, 0xdb, 0x8d, 0x29, 0x54, 0x14,
};static const unsigned char data[]
To be, or not to be, that is the question,\n
Whether tis nobler in the minde to suffer\n
The ſlings and arrowes of outragious fortune,\n
Or to take Armes again in a sea of troubles,\n
And by opposing, end them, to die to sleep;\n
No more, and by a sleep, to say we end\n
The heart-ache, and the thousand natural shocks\n
That flesh is heir to? tis a consumation\n
Devoutly to be wished. To die to sleep,\n
To sleepe, perchance to dreame, Aye, theres the rub,\n
For in that sleep of death what dreams may come\n
When we haue shuffled off this mortal coil\n
Must give us pause. Theres the respect\n
That makes calamity of so long life:\n
For who would bear the Ships and Scorns of time,\n
The oppressors wrong, the proud mans Contumely,\n
The pangs of dispised love, the Laws delay,\n
;/* The known value of the HMAC/SHA3-512 MAC of the above soliloqy */
static const unsigned char expected_output[] {0x3b, 0x77, 0x5f, 0xf1, 0x4f, 0x9e, 0xb9, 0x23,0x8f, 0xdc, 0xa0, 0x68, 0x15, 0x7b, 0x8a, 0xf1,0x96, 0x23, 0xaa, 0x3c, 0x1f, 0xe9, 0xdc, 0x89,0x11, 0x7d, 0x58, 0x07, 0xe7, 0x96, 0x17, 0xe3,0x44, 0x8b, 0x03, 0x37, 0x91, 0xc0, 0x6e, 0x06,0x7c, 0x54, 0xe4, 0xa4, 0xcc, 0xd5, 0x16, 0xbb,0x5e, 0x4d, 0x64, 0x7d, 0x88, 0x23, 0xc9, 0xb7,0x25, 0xda, 0xbe, 0x4b, 0xe4, 0xd5, 0x34, 0x30,
};/** A property query used for selecting the MAC implementation.*/
static const char* propq NULL;int main(void)
{int ret EXIT_FAILURE;OSSL_LIB_CTX* _ossl_lib_ctx NULL;EVP_MAC* _evp_mac NULL;EVP_MAC_CTX* _evp_mac_ctx NULL;EVP_MD_CTX* _evp_md_ctx NULL;unsigned char* out NULL;size_t out_len 0;OSSL_PARAM params[4], * p params;char digest_name[] SHA3-512;_ossl_lib_ctx OSSL_LIB_CTX_new();if (_ossl_lib_ctx NULL) {fprintf(stderr, OSSL_LIB_CTX_new() returned NULL\n);goto end;}/* Fetch the HMAC implementation */_evp_mac EVP_MAC_fetch(_ossl_lib_ctx, HMAC, propq);if (_evp_mac NULL) {fprintf(stderr, EVP_MAC_fetch() returned NULL\n);goto end;}/* Create a context for the HMAC operation */_evp_mac_ctx EVP_MAC_CTX_new(_evp_mac);if (_evp_mac_ctx NULL) {fprintf(stderr, EVP_MAC_CTX_new() returned NULL\n);goto end;}/* The underlying digest to be used */*p OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST, digest_name,sizeof(digest_name));*p OSSL_PARAM_construct_end();/* Initialise the HMAC operation */if (!EVP_MAC_init(_evp_mac_ctx, key, sizeof(key), params)) {fprintf(stderr, EVP_MAC_init() failed\n);goto end;}/* Make one or more calls to process the data to be authenticated */if (!EVP_MAC_update(_evp_mac_ctx, data, sizeof(data))) {fprintf(stderr, EVP_MAC_update() failed\n);goto end;}/* Make a call to the final with a NULL buffer to get the length of the MAC */if (!EVP_MAC_final(_evp_mac_ctx, NULL, out_len, 0)) {fprintf(stderr, EVP_MAC_final() failed\n);goto end;}out OPENSSL_malloc(out_len);if (out NULL) {fprintf(stderr, malloc failed\n);goto end;}/* Make one call to the final to get the MAC */if (!EVP_MAC_final(_evp_mac_ctx, out, out_len, out_len)) {fprintf(stderr, EVP_MAC_final() failed\n);goto end;}printf(Generated MAC:\n);BIO_dump_indent_fp(stdout, out, (int)out_len, 2);putchar(\n);if (out_len ! sizeof(expected_output)) {fprintf(stderr, Generated MAC has an unexpected length\n);goto end;}if (CRYPTO_memcmp(expected_output, out, sizeof(expected_output)) ! 0) {fprintf(stderr, Generated MAC does not match expected value\n);goto end;}ret EXIT_SUCCESS;
end:if (ret ! EXIT_SUCCESS)ERR_print_errors_fp(stderr);/* OpenSSL free functions will ignore NULL arguments */OPENSSL_free(out);EVP_MD_CTX_free(_evp_md_ctx);EVP_MAC_CTX_free(_evp_mac_ctx);EVP_MAC_free(_evp_mac);OSSL_LIB_CTX_free(_ossl_lib_ctx);return ret;
}
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