openssl的加解密,签名,验签代码

来源：互联网发布：linux shadowsock 编辑：程序博客网时间：2024/06/05 01:13

加密算法：

QString EncryData(const char *publicKey, const char *content)//publicKey:公钥,content:要加密的内容{      RSA *p_rsa = GetKeyRSA(publicKey,1);//将文本公钥转化成 RSA 对象      int rsa_len = RSA_size(p_rsa);      char p_e[1000] = {0};      if(RSA_public_encrypt(strlen(content), (unsigned char *)content, (unsigned char*)p_e, p_rsa, RSA_PKCS1_PADDING)<0) {          qDebug()<<"RSA_public_encrypt err";          return "";      }      while (true) {RSA_PKCS1_PADDING 加密后是128的长度，不知道为什么有时加密长度不为128          if(strlen(p_e) == 128){                break;          }          if(RSA_public_encrypt(strlen(content), (unsigned char *)content, (unsigned char*)p_e, p_rsa, RSA_PKCS1_PADDING)<0)              qDebug()<<"RSA_public_encrypt err";          mSleep(50);      }      RSA_free(p_rsa);      char * bp_e = base64Encode(p_e,rsa_len);     return QString::fromLatin1(bp_e);}

解密算法：

void DecryData(const char *privateKey,const char* content){     qDebug()<<"------RSA_private_decrypt-------";     RSA *p_rsa = GetKeyRSA(privateKey,2);     int rsa_len = RSA_size(p_rsa);     char p_de[1000] = {0};     std::string unBase64 = base64_decode(content);      if (RSA_private_decrypt(unBase64.length(), (unsigned char *)unBase64.c_str(), (unsigned char*)p_de, p_rsa, RSA_PKCS1_PADDING)<0) {//RSA_PKCS1_PADDING          qDebug()<<"RSA_private_decrypt err";          return ;      }      RSA_free(p_rsa);     qDebug()<<"RSA_private_decrypt:"<<p_de;}

私钥签名：

QString Widget::rsa_signA(const char *privateKey,const char* content){     char p_sign[1000] = {0};     RSA *p_rsa =  GetKeyRSA(privateKey,2);     int rsa_len = RSA_size(p_rsa);     if(RSA_sign(NID_md5,(unsigned char*)content,strlen(content),(unsigned char*)p_sign,(unsigned int *)&rsa_len,p_rsa)<0){         qDebug()<<"RSA_SIGN FAILED";         return "";     }    RSA_free(p_rsa);    char *sign =  base64Encode(p_sign,rsa_len);    qDebug()<<"sign:"<<sign;return QString::fromLatin1(sign);}

公钥验签：

bool rsa_verify(const char *publicKey,const char* sign,const char *content){    char p_ver[1000] = {0};    RSA *p_rsa =  GetKeyRSA(publicKey,1);    int rsa_len = RSA_size(p_rsa);    std::string dSign = base64_decode(sign);    int res = RSA_verify(NID_md5,(unsigned char*)content,strlen(content) ,(unsigned char*)dSign.c_str(),dSign.length() ,p_rsa);    RSA_free(p_rsa);    qDebug()<<"res:"<<res;    if(res == 1){     qDebug()<<"RSA_verify success:"<<res;    }else{         qDebug()<<"RSA_verify FAILED";    }    return res == 1;}

代码下载地址：http://download.csdn.net/download/xzpblog/9986593

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