[OpenSSL][原]获得文件签名

川长思鸟来 2022-04-15 07:48 169阅读 0赞

测试数据链接：\[url\]http://jacky-dai.iteye.com/admin/blogs/1743774\[/url\]

#include <openssl/rsa.h>  
    #include <openssl/evp.h>  
    #pragma comment(lib, "libeay32.lib") 
    
    void ReverseBuffer(unsigned char *pBuf, unsigned long ulLen)
    {
       
        if(0 == ulLen)
        {
       
            return;
        }
    
        //char tmp;
        unsigned char ucTemp;
        for(unsigned long i = 0, j = ulLen-1; i < ulLen/2; i++, j--)
        {
       
            ucTemp = pBuf[i];
            pBuf[i] = pBuf[j];
            pBuf[j] = ucTemp;
        }
    }
    
    void OpenSSLGenFileSignature_byFile()
    {
       
        RSA* rsa = RSA_new();
        MSkeyConvertToOpenSSLKey("Test_1024_Key.prv", *rsa);
    
        EVP_PKEY *evpKey = EVP_PKEY_new(); //新建一个EVP_PKEY变量
        EVP_PKEY_set1_RSA(evpKey, rsa);
    
        const EVP_MD* algrothm = EVP_sha1();
        EVP_MD_CTX mdctx;
        EVP_MD_CTX_init(&mdctx);
        EVP_VerifyInit_ex(&mdctx, algrothm, NULL);
    
        byte file[512] = {0};
        DWORD dwFileSize = sizeof(file);
        ReadBufferFromFile("PublicKey.bin", file, &dwFileSize);
    
        EVP_SignUpdate(&mdctx, file, dwFileSize);
    
        BYTE signValue[128] = {0};
        UINT signLen = 0;
        EVP_SignFinal(&mdctx, signValue, &signLen, evpKey);
    
        EVP_MD_CTX_cleanup(&mdctx);
        EVP_PKEY_free(evpKey);
    
        RSA_free(rsa);
    }
    
    void OpenSSLGenFileSignature_byFileHash()
    {
       
        RSA* rsa = RSA_new();
        MSkeyConvertToOpenSSLKey("Test_1024_Key.prv", *rsa);
    
        const EVP_MD* algrothm = EVP_sha1();
    
        byte byHashData[32] = {0};
        DWORD dwHashSize = sizeof(byHashData);
        ReadBufferFromFile("HashData.bin", byHashData, &dwHashSize);
        ReverseBuffer(byHashData, dwHashSize);
    
        byte bySignedBuf[512] = {0};
        UINT nSignSize = 0;
        int nRet = RSA_sign(algrothm->type, byHashData, (UINT)dwHashSize, bySignedBuf, &nSignSize, rsa);
        RSA_free(rsa);
    }
    
    This example digests the data ``Test Message\n'' and ``Hello World\n'', using the digest name passed on the command line.
    
     #include <stdio.h>
     #include <openssl/evp.h>
     main(int argc, char *argv[])
     {
       
     EVP_MD_CTX *mdctx;
     const EVP_MD *md;
     char mess1[] = "Test Message\n";
     char mess2[] = "Hello World\n";
     unsigned char md_value[EVP_MAX_MD_SIZE];
     int md_len, i;
     OpenSSL_add_all_digests();
     if(!argv[1]) {
       
            printf("Usage: mdtest digestname\n");
            exit(1);
     }
     md = EVP_get_digestbyname(argv[1]);
     if(!md) {
       
            printf("Unknown message digest %s\n", argv[1]);
            exit(1);
     }
     mdctx = EVP_MD_CTX_create();
     EVP_DigestInit_ex(mdctx, md, NULL);
     EVP_DigestUpdate(mdctx, mess1, strlen(mess1));
     EVP_DigestUpdate(mdctx, mess2, strlen(mess2));
     EVP_DigestFinal_ex(mdctx, md_value, &md_len);
     EVP_MD_CTX_destroy(mdctx);
     printf("Digest is: ");
     for(i = 0; i < md_len; i++) printf("%02x", md_value[i]);
     printf("\n");
     }

#include <openssl/rsa.h>
    #include <openssl/evp.h>
    //
    void OpenSSL_Test_SHA1(void)
    {
       
        const EVP_MD* algrothm = EVP_sha1();
        EVP_MD_CTX mdctx;
        BYTE file[6] = {0x31, 0x32, 0x33, 0x34, 0x35, 0x36};
        BYTE signValue[128] = {0};
        UINT signLen = 0;
    
        EVP_MD_CTX_init(&mdctx);
    
        EVP_DigestInit_ex(&mdctx, EVP_sha1(), NULL);
        EVP_DigestUpdate(&mdctx, file, 6);
        EVP_DigestFinal_ex(&mdctx, signValue, &signLen);
    
        printf("%s:%d  %s\n", __FILE__, __LINE__, __FUNCTION__);
        PrintHexBuffer(signValue, signLen);
    	//7C4A8D09CA3762AF61E59520943DC26494F8941B
    }