CryptoAPI与OpenSSL RSA非对称加密解密(PKCS1 PADDING)交互


(以下代码中都只做测试用,有些地方没有释放内存...这个自己解决下)

1.RSA非对称的,首先提供一个供测试用的证书和私钥的数据

1)pem格式的证书和私钥(公私钥是对应的)的base64编码

  1. void readPriKey(string &a){  
  2.     a =  "-----BEGIN RSA PRIVATE KEY-----\n";  
  3.     a.append("MIICXQIBAAKBgQDTFPiHkUX279j7OnK2ToLrwD/QI9N/fL/XoMnW1sBYJdSWs/VP\n");  
  4.     a.append("5oywvy6yJ0KMpfYcbRCJh2oRbPw7T9IrSHKdOkhB9PF6qwn90xb3Bk22l1LYZNfw\n");  
  5.     a.append("IQKqRjAXctR8GSC5ULBQmZK2T6m50oD5vl6rD6lnmrQyQSZ3tNNRYbxx/QIDAQAB\n");  
  6.     a.append("AoGAVqzSzOAzaY3dfHPorMGacvHzgiVj8IKqSAHHP8fZHZkTLXrh7ZhPBzjKFO+Y\n");  
  7.     a.append("HSb843lJhB+tx1AIVtaVB57tKLHJSrAjFem6mHV+X+JhMeX358QS0QFbUiKfAK5e\n");  
  8.     a.append("AkM1UdihF/3BX47DZUe44ntRqhffwsNGuZs2tB5FPHIpnGUCQQDvuBumamo+4tff\n");  
  9.     a.append("oF9Z/iuMJTyDerPgrQbC85ZoHBULLKtnzSUt7pdSsPMMBfImDpquhkLntC+kFV5b\n");  
  10.     a.append("yXu2nC5bAkEA4Wr1na+izFxmOnppvOjs7eFnch2THvNsajJ+Yl/jnRGGS5CLccrd\n");  
  11.     a.append("JgUm+j91VUitl88XY/GXAUDIobGw/iAAhwJBANZziODekD/D5cVcDhFPDZwpb7Jb\n");  
  12.     a.append("ofHcOJFNIv/uJ3FAu/J3lsw5hsxmGnhmFVOwevaoi9AG5RvQNgK9A9zAacMCQQDT\n");  
  13.     a.append("PI4qVHp0k2nhBvGra4MLcBymXXyOloJUCjlRKpZ7i/6TNULXQcl3ZYCfJXRolRDH\n");  
  14.     a.append("n/NFXxGoxPK+Q2ue2JJlAkBw1Z/1q2f6JYJ8pLBvdBSmOmKvm+O7x5s0csN7DnXf\n");  
  15.     a.append("aK1D4/cyCbLdqgogbolQkOwIwUuXLkitW1ldh+MinTMz\n");  
  16.     a.append("-----END RSA PRIVATE KEY-----\n");  
  17.   
  18. }  
  19.   
  20. void readCert(string &a){  
  21.     a = "-----BEGIN CERTIFICATE-----\n";  
  22.     a.append("MIIGVTCCBT2gAwIBAgIKGCyzsAAAAAAAbjANBgkqhkiG9w0BAQUFADA9MRUwEwYK\n");  
  23.     a.append("CZImiZPyLGQBGRYFbG9jYWwxEzARBgoJkiaJk/IsZAEZFgNpc3MxDzANBgNVBAMT\n");  
  24.     a.append("BldIVUlTUzAeFw0xMjA0MTEwMTMxNThaFw0xMzA0MTEwMTMxNThaMHIxFTATBgoJ\n");  
  25.     a.append("kiaJk/IsZAEZFgVsb2NhbDETMBEGCgmSJomT8ixkARkWA2lzczEOMAwGA1UEAxMF\n");  
  26.     a.append("VXNlcnMxEjAQBgNVBAMMCeWRqOe7jeemuTEgMB4GCSqGSIb3DQEJARYRemhvdXl1\n");  
  27.     a.append("emh5QDEyNi5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBANMU+IeRRfbv\n");  
  28.     a.append("2Ps6crZOguvAP9Aj0398v9egydbWwFgl1Jaz9U/mjLC/LrInQoyl9hxtEImHahFs\n");  
  29.     a.append("/DtP0itIcp06SEH08XqrCf3TFvcGTbaXUthk1/AhAqpGMBdy1HwZILlQsFCZkrZP\n");  
  30.     a.append("qbnSgPm+XqsPqWeatDJBJne001FhvHH9AgMBAAGjggOkMIIDoDAdBgNVHQ4EFgQU\n");  
  31.     a.append("vjfBpRVvsUsaWnX4dC81QzXu5T4wHwYDVR0jBBgwFoAU++PzmmgpwxErxTVrbJp5\n");  
  32.     a.append("IzqO3RswggECBgNVHR8EgfowgfcwgfSggfGgge6GgbNsZGFwOi8vL0NOPVdIVUlT\n");  
  33.     a.append("UyxDTj16c3ktMDIxMWMxNWEyNTIsQ049Q0RQLENOPVB1YmxpYyUyMEtleSUyMFNl\n");  
  34.     a.append("cnZpY2VzLENOPVNlcnZpY2VzLENOPUNvbmZpZ3VyYXRpb24sREM9aXNzLERDPWxv\n");  
  35.     a.append("Y2FsP2NlcnRpZmljYXRlUmV2b2NhdGlvbkxpc3Q/YmFzZT9vYmplY3RDbGFzcz1j\n");  
  36.     a.append("UkxEaXN0cmlidXRpb25Qb2ludIY2aHR0cDovL3pzeS0wMjExYzE1YTI1Mi5pc3Mu\n");  
  37.     a.append("bG9jYWwvQ2VydEVucm9sbC9XSFVJU1MuY3JsMIIBFgYIKwYBBQUHAQEEggEIMIIB\n");  
  38.     a.append("BDCBowYIKwYBBQUHMAKGgZZsZGFwOi8vL0NOPVdIVUlTUyxDTj1BSUEsQ049UHVi\n");  
  39.     a.append("bGljJTIwS2V5JTIwU2VydmljZXMsQ049U2VydmljZXMsQ049Q29uZmlndXJhdGlv\n");  
  40.     a.append("bixEQz1pc3MsREM9bG9jYWw/Y0FDZXJ0aWZpY2F0ZT9iYXNlP29iamVjdENsYXNz\n");  
  41.     a.append("PWNlcnRpZmljYXRpb25BdXRob3JpdHkwXAYIKwYBBQUHMAKGUGh0dHA6Ly96c3kt\n");  
  42.     a.append("MDIxMWMxNWEyNTIuaXNzLmxvY2FsL0NlcnRFbnJvbGwvenN5LTAyMTFjMTVhMjUy\n");  
  43.     a.append("Lmlzcy5sb2NhbF9XSFVJU1MuY3J0MAwGA1UdEwEB/wQCMAAwCwYDVR0PBAQDAgWg\n");  
  44.     a.append("MD4GCSsGAQQBgjcVBwQxMC8GJysGAQQBgjcVCIbd/wqC4JYWgbmLGoKIvT+HxNMh\n");  
  45.     a.append("gXGE+cJBg4yVdgIBZAIBBjApBgNVHSUEIjAgBggrBgEFBQcDAgYIKwYBBQUHAwQG\n");  
  46.     a.append("CisGAQQBgjcKAwQwNQYJKwYBBAGCNxUKBCgwJjAKBggrBgEFBQcDAjAKBggrBgEF\n");  
  47.     a.append("BQcDBDAMBgorBgEEAYI3CgMEMDsGA1UdEQQ0MDKgHQYKKwYBBAGCNxQCA6APDA16\n");  
  48.     a.append("c3lAaXNzLmxvY2FsgRF6aG91eXV6aHlAMTI2LmNvbTBEBgkqhkiG9w0BCQ8ENzA1\n");  
  49.     a.append("MA4GCCqGSIb3DQMCAgIAgDAOBggqhkiG9w0DBAICAIAwBwYFKw4DAgcwCgYIKoZI\n");  
  50.     a.append("hvcNAwcwDQYJKoZIhvcNAQEFBQADggEBABj0xXhayI5JdqbuyAbqNwzGZxt4X102\n");  
  51.     a.append("CFFeTU5jauspQjqEpar+/IQ+r3/vf162bY/lLHLpDarFLbZ9dAC6nqNfnE4gg9r7\n");  
  52.     a.append("p+dbkbzFyBuSTqrzHQ6JgRYSdjwaksHV+uZuP7dfP2HXw4F1T3Ch/7ZKW9+ZlVvd\n");  
  53.     a.append("QCygAu0z+TS2e7oRFb+swQLVKda8kPTM/b69+r/xdTHXY6+CkfVAk4oYBB56a9AD\n");  
  54.     a.append("t1XOoAUa42fJdit6+7ssLLTZkZLNsQl6qsuTdv64dIMda4C6NnUsKDfjWGa+0vs3\n");  
  55.     a.append("VjVNsUC5jo4qRc4XmBvJIx6e5M420sPj2Gi/+ssgmaXK+zUWzowIoMU=\n");  
  56.     a.append("-----END CERTIFICATE-----\n");  
  57. }  
2)CryptoAPI和openssl公私钥保持一致,去掉pem头尾直接用便是,没有加密

  证书的:

  1. void readCertBase64(string &a){  
  2.     a = "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\n";  
  3. }  
因为尝试私钥没有导入成功,暂且不管,关于这一点待会再说验证交互成功的替换方案

2.先来看下openssl的RSA实现方案,openssl本身提供了许多的padding方式,

因为CryptoAPI只提供了PKCS1和OAEP两种补齐方式,默认使用的PKCS1,那这里就用PKCS1来验证吧

1)首先需要导入证书和私钥,用于后续加密解密,这里就直接采用通过Base64码来导入

  1. EVP_PKEY * importKey(){  
  2.     OpenSSL_add_all_algorithms();  
  3.   
  4.     EVP_PKEY *prikey;  
  5.     string a = "";  
  6.     readPriKey(a);//获取私钥的base64码   
  7.     const char* sPriKey = a.c_str();  
  8.     BIO* bio = BIO_new_mem_buf((void*)sPriKey,strlen(sPriKey));//通过BIO放入内存   
  9.     prikey = PEM_read_bio_PrivateKey(bio,NULL,NULL,NULL);//读取bio,获取私钥对象   
  10.     BYTE* sign_value = (BYTE*)malloc(1024);  
  11.     unsigned int len;  
  12.     return prikey;  
  13. }  
  14. EVP_PKEY * importCert(){  
  15.     X509* cert;  
  16.     OpenSSL_add_all_algorithms();  
  17.     string a = "";  
  18.     readCert(a);//证书的base64码   
  19.     const char* sCert = a.c_str();  
  20.     BIO* bio = BIO_new_mem_buf((void*)sCert,strlen(sCert));//存到内存   
  21.     cert = PEM_read_bio_X509(bio,NULL,NULL,NULL);//读取bio,获取证书对象   
  22.   
  23.     EVP_PKEY* evp_pubKey =X509_get_pubkey(cert);//获取证书的公钥   
  24.   
  25.       
  26.     int len;  
  27.     if(evp_pubKey){  
  28.         return evp_pubKey;  
  29.     }  
  30.     else  
  31.         cout << "evp_pubKey == NULL" << endl;  
  32.     return NULL;  
  33. }  
2)有了公钥,私钥对象,接下来做非对称加密和解密就简单些了

这里得提下补齐方式,因为和CryptoAPI的补齐方式要保持一致,折腾了许多时间

CryptoAPI的默认补齐方式是PKCS1,我先以为就是NO_PADDING,结果发现CryptoAPI貌似就没有对NO_PADDING的支持

openssl有NO_PADDING的支持,如果使用这个方式,最好自己将剩余位全部补上规律的数据,便于解密后容易获取到要的明文

NO_PADDING就必须明文和密钥大小一样了,1024位RSA对应128字节明文

PKCS1的得减去11字节存储PKCS1自己的数据,1024位RSA只能加密117字节明文

OAEP则得减去41字节,只能加密87字节明文

如果超过大小,当然可以自己去分节处理,这里就不予讨论了

  1. void evelop(EVP_PKEY* evp_pubKey/*公钥对象*/,BYTE** out/*加密结果*/,unsigned int &cOut/*加密结果大小*/,const BYTE* in/*明文*/,unsigned int cIn/*明文大小*/){  
  2.     OpenSSL_add_all_algorithms();  
  3.     bool hasErr = true;  
  4.     EVP_PKEY_CTX* ctx = EVP_PKEY_CTX_new(evp_pubKey,NULL);  
  5.     if(!ctx)  
  6.         goto err;  
  7.     if(EVP_PKEY_encrypt_init(ctx)<=0)  
  8.         goto err;  
  9.     if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_PADDING) <= 0)//设置补齐方式   
  10.         goto err;  
  11.   
  12.     if(EVP_PKEY_encrypt(ctx,NULL,&cOut,in,cIn)<=0)//得到加密的长度,一般都是跟密钥一样长,1024位的RSA密钥就是128字节   
  13.         goto err;  
  14.     *out =(BYTE*) OPENSSL_malloc(cOut);  
  15.     if(!out)  
  16.         goto err;  
  17.   
  18.     if(EVP_PKEY_encrypt(ctx,*out,&cOut,in,cIn)<=0)//得到加密结果   
  19.         goto err;  
  20.     cout << "加密成功!" << endl;  
  21.     hasErr = false;  
  22. err:  
  23.     EVP_PKEY_CTX_free(ctx);  
  24.     if(!hasErr)  
  25.         return;  
  26.     return;  
  27. }  
  28.   
  29. void develop(EVP_PKEY* priKey,BYTE** out,unsigned int &cOut, BYTE* data,unsigned int cData){  
  30.     OpenSSL_add_all_algorithms();  
  31.     bool hasErr = true;  
  32.     EVP_PKEY_CTX* ctx = EVP_PKEY_CTX_new(priKey,NULL);  
  33.     if(!ctx)  
  34.         goto err;  
  35.     if (EVP_PKEY_decrypt_init(ctx) <= 0)  
  36.         goto err;  
  37.     if(EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_PADDING) <= 0)//与加密同样的PKCS1补齐   
  38.         goto err;  
  39.     if (EVP_PKEY_decrypt(ctx, NULL, &cOut, data, cData) <= 0)//解密结果大小   
  40.         goto err;  
  41.     *out =(BYTE*) OPENSSL_malloc(cOut);//分配内存   
  42.     if (!out)  
  43.         goto err;  
  44.     if (EVP_PKEY_decrypt(ctx, *out, &cOut, data, cData) <= 0)//得到解密结果   
  45.         goto err;  
  46.     hasErr = false;  
  47. err://输出一些错误信息,偶尔错误信息得不到,只得到一些文件名和所在行,就跑到源代码去找...麻烦死了,如果有好的方案求回复~   
  48.     EVP_PKEY_CTX_free(ctx);  
  49.     if(!hasErr)  
  50.         return;  
  51.     cout << "err in develop" << endl;  
  52.   
  53.     const      char*file,*data1,*efunc,*elib,*ereason,*p;  
  54.   
  55.     int                         line,flags;  
  56.     unsigned long  errn;  
  57.   
  58.   
  59.     errn=ERR_peek_error_line_data(&file,&line,&data1,&flags);  
  60.   
  61.     printf("ERR_peek_error_line_data err : %ld,file :%s,line :%d,data :%s\n",errn,file,line,data1);  
  62.   
  63.   
  64. }  
3)自己测试下上面的代码吧,应该是没问题的
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