利用私钥加签名：
//contentForSign为需加标签的字符串
public String signWhithsha1withrsa(string contentForSign)
{
string result="";
try
{
RSACryptoServiceProvider tMerchantKey=GetPrivateKey();//获取私钥
SHA1Managed tHash=new SHA1Managed();
//将传递需要加签的字符串进行base64操作
byte[] base64=Encoding.UTF8.GetBytes(Convert.ToBase64String(Encoding.UTF8.GetBytes(contentForSign)));
byte[] tHashedData=tHash.ComputeHash(base64);
//对其进行加签名
byte[] tSigned=tMerchantKey.SignHash(tHashedData,"SHA1");
result=Convert.ToBase64String(tSigned);
return result;
}
catch(Exception e)
{
logger.Info("加签失败！"，e);
}}
//读取cer并验证公钥签名
//requestBody为json报文数据
//signature为加签标识
public bool read_cer_and_verify_sign(string requestBody,string signature)
{
bool result=false;
try
{
byte[] orgin=Encoding.UTF8.GetBytes((requestBody));//json报文数据获得字节数据
byte[] singedBase64=Convert.FromBase64String((signature));
//读取证书
RSACryptoServiceProvider tMerchantKey=GetPublicKey();//获取公钥
result=tMerchantKey.VerifyData(orgin,"SHA1",singedBase64);
return result;
}
catch(Exception e)
{
logger.Info("验签失败！",e);
}
}