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我的问题与2011年的一个表格Signing and verifying signatures with RSA C#非常相似。尽管如此,当我比较签名数据和原始消息时,我也会失败。请指出我的错误。C#使用RSA签名和验证签名。编码问题
代码:
public static void Main(string[] args)
{
//Generate a public/private key pair.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Save the public key information to an RSAParameters structure.
RSAParameters RSAPublicKeyInfo = RSA.ExportParameters(false);
RSAParameters RSAPrivateKeyInfo = RSA.ExportParameters(true);
string message = "2017-04-10T09:37:35.351Z";
string signedMessage = SignData(message, RSAPrivateKeyInfo);
bool success = VerifyData(message, signedMessage, RSAPublicKeyInfo);
Console.WriteLine($"success {success}");
Console.ReadLine();
}
签名方法:
public static string SignData(string message, RSAParameters privateKey)
{
ASCIIEncoding byteConverter = new ASCIIEncoding();
byte[] signedBytes;
using (var rsa = new RSACryptoServiceProvider())
{
// Write the message to a byte array using ASCII as the encoding.
byte[] originalData = byteConverter.GetBytes(message);
try
{
// Import the private key used for signing the message
rsa.ImportParameters(privateKey);
// Sign the data, using SHA512 as the hashing algorithm
signedBytes = rsa.SignData(originalData, CryptoConfig.MapNameToOID("SHA512"));
}
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
finally
{
// Set the keycontainer to be cleared when rsa is garbage collected.
rsa.PersistKeyInCsp = false;
}
}
// Convert the byte array back to a string message
return byteConverter.GetString(signedBytes);
}
验证方法:
public static bool VerifyData(string originalMessage, string signedMessage, RSAParameters publicKey)
{
bool success = false;
using (var rsa = new RSACryptoServiceProvider())
{
ASCIIEncoding byteConverter = new ASCIIEncoding();
byte[] bytesToVerify = byteConverter.GetBytes(originalMessage);
byte[] signedBytes = byteConverter.GetBytes(signedMessage);
try
{
rsa.ImportParameters(publicKey);
success = rsa.VerifyData(bytesToVerify, CryptoConfig.MapNameToOID("SHA512"), signedBytes);
}
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
}
finally
{
rsa.PersistKeyInCsp = false;
}
}
return success;
}
基本上问题是与串为byte []编码。我遇到了与ASCIIEncoding和UTF8Encoding相同的问题。
预先感谢您!
感谢您的及时答复!但是,我得到“System.FormatException:”输入不是有效的Base-64字符串,因为它包含非基本64字符,多于两个填充字符或填充字符中的非法字符。'“当我使用FromBase64String为消息“”2017-04-10T09:37:35.351Z“”。 –
在验证之前是否有任何事情发生在字符串上?我用上面的2个更改运行了你的发布代码,它工作。 – msitt
你是对的!我的糟糕之处在于,我还试图在签名之前对原始数据的Base64字符串执行字符串。 –