openssl3.2 - 官方demo学习 - kdf

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文章目录

- openssl3.2 - 官方demo学习 - kdf - argon2.c
- 概述
- 笔记
- END

openssl3.2 - 官方demo学习 - kdf - argon2.c

概述

设置KDF算法的参数, 并获得key

笔记

/*!
\file argon2.c
\note openssl3.2 - 官方demo学习 - kdf - argon2.c
设置KDF算法的参数, 并获得key
*//** Copyright 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*/#include <stdio.h>
#include <openssl/core_names.h>
#include <openssl/crypto.h>
#include <openssl/kdf.h>
#include <openssl/params.h>
#include <openssl/thread.h>#include "my_openSSL_lib.h"/** Example showing how to use Argon2 KDF.* See man EVP_KDF-ARGON2 for more information.** test vector from* https://datatracker.ietf.org/doc/html/rfc9106*//** Hard coding a password into an application is very bad.* It is done here solely for educational purposes.*/
static unsigned char password[] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
};/** The salt is better not being hard coded too.  Each password should have a* different salt if possible.  The salt is not considered secret information* and is safe to store with an encrypted password.*/
static unsigned char salt[] = {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02
};/** Optional secret for KDF*/
static unsigned char secret[] = {0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03
};/** Optional additional data*/
static unsigned char ad[] = {0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,0x04, 0x04, 0x04, 0x04
};/** Argon2 cost parameters*/
static uint32_t memory_cost    = 32;
static uint32_t iteration_cost =  3;
static uint32_t parallel_cost  =  4;static const unsigned char expected_output[] = {0x0d, 0x64, 0x0d, 0xf5, 0x8d, 0x78, 0x76, 0x6c,0x08, 0xc0, 0x37, 0xa3, 0x4a, 0x8b, 0x53, 0xc9,0xd0, 0x1e, 0xf0, 0x45, 0x2d, 0x75, 0xb6, 0x5e,0xb5, 0x25, 0x20, 0xe9, 0x6b, 0x01, 0xe6, 0x59
};int main(int argc, char **argv)
{int rv = EXIT_FAILURE;EVP_KDF *_evp_kdf = NULL;EVP_KDF_CTX *_evp_kdf_ctx = NULL;unsigned char out[32];OSSL_PARAM _ossl_param_ary[9], *p_ossl_param = _ossl_param_ary;OSSL_LIB_CTX *_ossl_lib_ctx = NULL;unsigned int threads;_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 key derivation function implementation */_evp_kdf = EVP_KDF_fetch(_ossl_lib_ctx, "argon2id", NULL);if (_evp_kdf == NULL) {fprintf(stderr, "EVP_KDF_fetch() returned NULL\n");goto end;}/* Create a context for the key derivation operation */_evp_kdf_ctx = EVP_KDF_CTX_new(_evp_kdf);if (_evp_kdf_ctx == NULL) {fprintf(stderr, "EVP_KDF_CTX_new() returned NULL\n");goto end;}/** Thread support can be turned off; use serialization if we cannot* set requested number of threads.*/threads = parallel_cost;if (OSSL_set_max_threads(_ossl_lib_ctx, parallel_cost) != 1) {uint64_t max_threads = OSSL_get_max_threads(_ossl_lib_ctx);if (max_threads == 0)threads = 1;else if (max_threads < parallel_cost)threads = (unsigned int)max_threads;}/* Set password */*p_ossl_param++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD, password, sizeof(password));/* Set salt */*p_ossl_param++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, salt, sizeof(salt));/* Set optional additional data */*p_ossl_param++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_ARGON2_AD, ad, sizeof(ad));/* Set optional secret */*p_ossl_param++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SECRET, secret, sizeof(secret));/* Set iteration count */*p_ossl_param++ = OSSL_PARAM_construct_uint32(OSSL_KDF_PARAM_ITER, &iteration_cost);/* Set threads performing derivation (can be decreased) */*p_ossl_param++ = OSSL_PARAM_construct_uint(OSSL_KDF_PARAM_THREADS, &threads);/* Set parallel cost */*p_ossl_param++ = OSSL_PARAM_construct_uint32(OSSL_KDF_PARAM_ARGON2_LANES, &parallel_cost);/* Set memory requirement */*p_ossl_param++ = OSSL_PARAM_construct_uint32(OSSL_KDF_PARAM_ARGON2_MEMCOST, &memory_cost);*p_ossl_param = OSSL_PARAM_construct_end();/* Derive the key */if (EVP_KDF_derive(_evp_kdf_ctx, out, sizeof(out), _ossl_param_ary) != 1) {fprintf(stderr, "EVP_KDF_derive() failed\n");goto end;}if (CRYPTO_memcmp(expected_output, out, sizeof(expected_output)) != 0) {fprintf(stderr, "Generated key does not match expected value\n");goto end;}rv = EXIT_SUCCESS;
end:EVP_KDF_CTX_free(_evp_kdf_ctx);EVP_KDF_free(_evp_kdf);OSSL_LIB_CTX_free(_ossl_lib_ctx);return rv;
}