}printf("\n\n");printf("SM2 signature length: %ld bytes.\n", sig_len);printf("SM2 signature (ASN.1 encode):\n");for(i =0; i < (int)sig_len; i++) {printf("0x%x ", sig[i]); }printf("\n\n");/* verify SM2 signature */if( !(md_ctx_verify =EVP_MD_CTX_new()) )...
SM2是一种基于椭圆曲线密码学(ECC)的公钥密码算法,由中国国家密码管理局发布。它主要用于数字签名、密钥交换和公钥加密等领域,具有较高的安全性和效率。 2. 安装和配置OpenSSL以支持SM2 首先,你需要确保安装的OpenSSL版本支持SM2。可以通过以下命令检查OpenSSL是否支持SM2: bash openssl ecparam -list_curves 如果输出...
验证签名流程 接下来,我们将介绍在C语言openssl中如何验证JAVASM2签名的流程。 首先,我们需要加载公钥和签名文件。在C语言中,我们可以使用openssl库提供的API来加载公钥和签名文件。 #include<openssl/evp.h>#include<openssl/ec.h>#include<openssl/bio.h>#include<openssl/pem.h>intverify_signature(constchar*publi...
本文使用OpenSSL工具生成国密算法SM2的三级CA证书,组成证书链,并使用证书链签名客户端证书和服务端证书。 可以通过证书链对生成的客户端和服务端证书进行校验。 虽然OpenSSL工具可以使用SM2算法来生成并校验证书…
int openssl_evp_sm2_verify(unsigned char *sign_rom, size_t sign_rom_len, unsigned char *result, size_t result_len, const unsigned char *pub_pem_file) { int ret = 0; FILE *fp = NULL; BIO *bp = NULL; EVP_MD_CTX *evp_md_ctx = NULL; EC_KEY *ec_key = NULL; EVP_PKEY* pub...
sm2_sign.c #include<stdio.h>#include<stdlib.h>#include<openssl/ec.h>#include<openssl/evp.h>intmain(void){intret =-1, i; EVP_PKEY_CTX* pctx =NULL, * sctx =NULL; EVP_PKEY* pkey =NULL; EVP_MD_CTX* md_ctx =NULL, * md_ctx_verify =NULL;unsignedcharmessage[16] ="202012132020121...
("SM2签名: "+Base64.getEncoder().encodeToString(signatureBytes));// 验签SignatureverifySignature=Signature.getInstance("SM3withSM2");verifySignature.initVerify(keyPair.getPublic());verifySignature.update(data);booleanisValid=verifySignature.verify(signatureBytes);System.out.println("验签结果: "+is...
Using the EVP interface in openssl to implement RSA and SM2 encrypt decrypt sign and verify (C lauguage) 0. Abstract Openssl provides a series of interfaces that name is EVP structure. Using the interfaces, it is pretty convenient to imp...
how to verify SM2(ECC) certificate this is my code: X509 *issuer X509 *subject EVP_PKEY *signing_key = X509_get_pubkey(issuer); int result = X509_verify(x509, signing_key); but it return -1; The certificate chain is OK. I try the code with RSA.It's OK. But it is error with...
sm2_sign.c: 点击查看代码 #include<stdio.h>#include<stdlib.h>#include<openssl/ec.h>#include<openssl/evp.h>intmain(void){intret =-1, i; EVP_PKEY_CTX* pctx =NULL, * sctx =NULL; EVP_PKEY* pkey =NULL; EVP_MD_CTX* md_ctx =NULL, * md_ctx_verify =NULL;unsignedcharmessage[16] ...