C# RSA2 SHA256 对应JAVA（SHA256withRSA）

//用于高德调用商家，数据已经替换敏感数据，所以运行会验证失败
//请拿实际参数代入

  

private static String getSignContent(Dictionary<String, String> paramMap)
{
StringBuilder content = new StringBuilder();
List<String> keys = new List<string>(paramMap.Keys);
// 将参数集合排序
//Collections.sort();
keys.Sort();
for (int i = 0; i < keys.Count; i++)
{
String key = keys[i];
//排除不需要参与签名的公共参数
if ("sign_type"==(key) || "sign" == (key) || "need_encrypt" == (key))
{
continue;
}
String value = paramMap[key];
// 拼装所有非空参数
if ( !string.IsNullOrWhiteSpace(key) && !string.IsNullOrWhiteSpace(value) )
{
content.Append(i == 0 ? "" : "&").Append(key).Append("=").Append(value);
}
}
return content.ToString();
}

 

 

 

public static void VerifyData()
{

Dictionary<String, String> params1 = new Dictionary<String, String>();
params1.Add("utc_timestamp", "1689818159186");//1
params1.Add("version", "1.0");//1
params1.Add("charset", "UTF-8");//1
params1.Add("sign_type", "RSA2");//1
params1.Add("method", "amap.brand.vip.getInfo");//1
params1.Add("sign", "lh+PBMhVxwdhNXsICd4u+JcMIZA6Gu1ly8cGuCijihs7oFtVcSBMAC6l2PSNPdniDRIjct8Tt+SzIHeNp0mFwZgjZMf1Q6JzZX6x2Ig/UnCl7IO4tMCUDJI6H/4GvEsYGNg+6CW/MgvwFrFlpij9aRs1uCDh8ghh68MW2GIwWjPR0VYEc1qOvb7Dx37RrirPDz44+PPl6T5WVcMCYMCgfhvK3lUrwAWMSA5GCdunZQ9hh6TiTHxv4bN5QK7C1zesUYs2NhsUXS4P52UdQ5L3zkiafQIoCfnT2Lf2ps/HTLd8jeyYX9Nreae3lyxBVl/wkhQim8Ez6Cqu7emq3TlAiA=="); //1
params1.Add("app_id", "保密，请从高德控制台获取");//1
params1.Add("biz_content", "{\"channel\":\"amap\",\"mobile\":\"18881341816\",\"requestId\":\"amap-168981815918497509168272711\",\"storeNo\":\"HHHL220008\",\"vipId\":\"\"}");//1

var sigeStr = getSignContent(params1);


var publicKey = LoadPublicKey(@"C:\public.pem");
byte[] messageAsByte = Encoding.GetEncoding("UTF-8").GetBytes(sigeStr) ;

byte[] sig256 = Convert.FromBase64String(params1["sign"]);
var verify256 = publicKey.VerifyData(messageAsByte, CryptoConfig.MapNameToOID("SHA256"), sig256);
//var verify512 = publicKey.VerifyData(messageAsByte, CryptoConfig.MapNameToOID("SHA512"), sig512);

Console.WriteLine("Signature verify 256: " + verify256);
//Console.WriteLine("Signature verify 512: " + verify512);
Console.ReadKey();
}

public static RSACryptoServiceProvider LoadPublicKey(String path)
{
System.IO.StreamReader fileStream = File.OpenText(path);
PemReader pemReader = new PemReader(fileStream);
AsymmetricKeyParameter KeyParameter = (AsymmetricKeyParameter)pemReader.ReadObject();
RSAParameters rsaParams = DotNetUtilities.ToRSAParameters((RsaKeyParameters)KeyParameter);
RSACryptoServiceProvider csp = new RSACryptoServiceProvider();// cspParams);
csp.ImportParameters(rsaParams);
return csp;

}

public.pem文件为 ：

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlpYnE+cLvHzTgv5KE******************************iKG3gjXD2lMW0SARwzq1sV4+aMz3vhYnMdD9igfkJI4EXtJFsOmzfNezdmP7D9jSgkXcrVEDDEPnqMP+fRLFT01O4JCQyJ9u02fIcVpBEQShOVDZZtTYM/6lMOKpPYcHh93at++XhqJc19j8btw+UJOWvf9MajYsT5CAcHX0gJbGtbIepW9Lqr+XkCMzg3HHQ5ZLoHfkLqt7Z6/klN/D1oNMfKVpLzyktPBzFfO9nmeWq11DPeIYmFtp+CBFJ0uRDSrQAclZs178ZbyonYkIhlf628F1MEaOVkSW7t3WbJkb9MQb/xwIDAQAB
-----END PUBLIC KEY-----

参考链接：

https://stackoverflow.com/questions/59722926/fail-to-match-sha256withrsa-signature-from-java-on-net-c-sharp