用html5做网站的心得体会,flash怎么制作网站,域名站长工具,网站全网建设 莱芜文章目录 openssl3.2 - 官方demo学习 - signature - rsa_pss_direct.c概述笔记END openssl3.2 - 官方demo学习 - signature - rsa_pss_direct.c 概述 用RSA私钥签名 d2i_PrivateKey_ex()可以从内存载入私钥数据, 得到私钥EVP_PKEY* 从私钥产生ctx, 对ctx进行签名初始化, 设置… 文章目录 openssl3.2 - 官方demo学习 - signature - rsa_pss_direct.c概述笔记END openssl3.2 - 官方demo学习 - signature - rsa_pss_direct.c 概述 用RSA私钥签名 d2i_PrivateKey_ex()可以从内存载入私钥数据, 得到私钥EVP_PKEY* 从私钥产生ctx, 对ctx进行签名初始化, 设置ctx的padding填充模式 摘要算法选用SHA256, 对ctx设置摘要算法 尝试签名, 得到签名长度, 然后进行私钥签名, 得到私钥签名buffer. 用RSA公钥验签 d2i_PublicKey()可以从内存载入公钥数据, 得到公钥EVP_PKEY* 验签时使用的摘要算法要和签名时一样. 验签初始化, 对ctx进行验签初始化, 这是ctx的padding填充模式(要和签名时一样) 进行验签 笔记 /*! \file rsa_pss_direct.c \noteopenssl3.2 - 官方demo学习 - signature - rsa_pss_direct.c用RSA私钥签名 d2i_PrivateKey_ex()可以从内存载入私钥数据, 得到私钥EVP_PKEY* 从私钥产生ctx, 对ctx进行签名初始化, 设置ctx的padding填充模式 摘要算法选用SHA256, 对ctx设置摘要算法 尝试签名, 得到签名长度, 然后进行私钥签名, 得到私钥签名buffer.用RSA公钥验签 d2i_PublicKey()可以从内存载入公钥数据, 得到公钥EVP_PKEY* 验签时使用的摘要算法要和签名时一样. 验签初始化, 对ctx进行验签初始化, 这是ctx的padding填充模式(要和签名时一样) 进行验签*//** 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*/#include stdio.h #include stdlib.h #include openssl/core_names.h #include openssl/evp.h #include openssl/rsa.h #include openssl/params.h #include openssl/err.h #include openssl/bio.h #include rsa_pss.h#include my_openSSL_lib.h/** The digest to be signed. This should be the output of a hash function.* Here we sign an all-zeroes digest for demonstration purposes.*/ static const unsigned char test_digest[32] { 0 };/* A property query used for selecting algorithm implementations. */ static const char* propq NULL;/** This function demonstrates RSA signing of a SHA-256 digest using the PSS* padding scheme. You must already have hashed the data you want to sign.* For a higher-level demonstration which does the hashing for you, see* rsa_pss_hash.c.** For more information, see RFC 8017 section 9.1. The digest passed in* (test_digest above) corresponds to the mHash value.*/ static int sign(OSSL_LIB_CTX* libctx, unsigned char** sig, size_t* sig_len) {int ret 0;EVP_PKEY* pkey NULL;EVP_PKEY_CTX* ctx NULL;EVP_MD* md NULL;const unsigned char* ppriv_key NULL;*sig NULL;/* Load DER-encoded RSA private key. */ppriv_key rsa_priv_key;pkey d2i_PrivateKey_ex(EVP_PKEY_RSA, NULL, ppriv_key,sizeof(rsa_priv_key), libctx, propq);if (pkey NULL) {fprintf(stderr, Failed to load private key\n);goto end;}/* Fetch hash algorithm we want to use. */md EVP_MD_fetch(libctx, SHA256, propq);if (md NULL) {fprintf(stderr, Failed to fetch hash algorithm\n);goto end;}/* Create signing context. */ctx EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);if (ctx NULL) {fprintf(stderr, Failed to create signing context\n);goto end;}/* Initialize context for signing and set options. */if (EVP_PKEY_sign_init(ctx) 0) {fprintf(stderr, Failed to initialize signing context\n);goto end;}if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_PSS_PADDING) 0) {fprintf(stderr, Failed to configure padding\n);goto end;}if (EVP_PKEY_CTX_set_signature_md(ctx, md) 0) {fprintf(stderr, Failed to configure digest type\n);goto end;}/* Determine length of signature. */if (EVP_PKEY_sign(ctx, NULL, sig_len,test_digest, sizeof(test_digest)) 0) {fprintf(stderr, Failed to get signature length\n);goto end;}/* Allocate memory for signature. */*sig OPENSSL_malloc(*sig_len);if (*sig NULL) {fprintf(stderr, Failed to allocate memory for signature\n);goto end;}/* Generate signature. */if (EVP_PKEY_sign(ctx, *sig, sig_len,test_digest, sizeof(test_digest)) ! 1) {fprintf(stderr, Failed to sign\n);goto end;}ret 1; end:EVP_PKEY_CTX_free(ctx);EVP_PKEY_free(pkey);EVP_MD_free(md);if (ret 0)OPENSSL_free(*sig);return ret; }/** This function demonstrates verification of an RSA signature over a SHA-256* digest using the PSS signature scheme.*/ static int verify(OSSL_LIB_CTX* libctx, const unsigned char* sig, size_t sig_len) {int ret 0;const unsigned char* ppub_key NULL;EVP_PKEY* pkey NULL;EVP_PKEY_CTX* ctx NULL;EVP_MD* md NULL;/* Load DER-encoded RSA public key. */ppub_key rsa_pub_key;pkey d2i_PublicKey(EVP_PKEY_RSA, NULL, ppub_key, sizeof(rsa_pub_key));if (pkey NULL) {fprintf(stderr, Failed to load public key\n);goto end;}/* Fetch hash algorithm we want to use. */md EVP_MD_fetch(libctx, SHA256, propq);if (md NULL) {fprintf(stderr, Failed to fetch hash algorithm\n);goto end;}/* Create verification context. */ctx EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq);if (ctx NULL) {fprintf(stderr, Failed to create verification context\n);goto end;}/* Initialize context for verification and set options. */if (EVP_PKEY_verify_init(ctx) 0) {fprintf(stderr, Failed to initialize verification context\n);goto end;}if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_PSS_PADDING) 0) {fprintf(stderr, Failed to configure padding\n);goto end;}if (EVP_PKEY_CTX_set_signature_md(ctx, md) 0) {fprintf(stderr, Failed to configure digest type\n);goto end;}/* Verify signature. */if (EVP_PKEY_verify(ctx, sig, sig_len,test_digest, sizeof(test_digest)) 0) {fprintf(stderr, Failed to verify signature; signature may be invalid\n);goto end;}ret 1; end:EVP_PKEY_CTX_free(ctx);EVP_PKEY_free(pkey);EVP_MD_free(md);return ret; }int main(int argc, char** argv) {int ret EXIT_FAILURE;OSSL_LIB_CTX* libctx NULL;unsigned char* sig NULL;size_t sig_len 0;if (sign(libctx, sig, sig_len) 0)goto end;if (verify(libctx, sig, sig_len) 0)goto end;ret EXIT_SUCCESS; end:OPENSSL_free(sig);OSSL_LIB_CTX_free(libctx);return ret; } END