public static void V_Test_RSA_DecodeMsg()
{
Console.WriteLine("Testing RSA_DecodeMsg ...");
byte[] abData = null;
byte[] abBlock = null;
byte[] abDigest = null;
byte[] abDigInfo = null;
//'Dim nDataLen As Integer
int nBlockLen = 0;
// 0. Create an encoded test block ready for for signing
abData = System.Text.Encoding.Default.GetBytes("abc");
//'nDataLen = UBound(abData) - LBound(abData) + 1
nBlockLen = 64;
abBlock = Rsa.EncodeMsgForSignature(nBlockLen, abData, HashAlgorithm.Sha1);
Console.WriteLine("BLOCK =" + Cnv.ToHex(abBlock));
// 1. Extract the message digest =SHA1("abc")
abDigest = Rsa.DecodeDigestForSignature(abBlock);
if (abDigest.Length == 0)
{
Console.WriteLine("Decryption Error");
return;
}
Console.WriteLine("Message digest is " + abDigest.Length + " bytes long");
Console.WriteLine("HASH =" + Cnv.ToHex(abDigest));
// 2. Extract the full DigestInfo data
abDigInfo = Rsa.DecodeDigestForSignature(abBlock, true);
if (abDigInfo.Length == 0)
{
Console.WriteLine("Decryption Error");
return;
}
Console.WriteLine("DigestInfo is " + abDigInfo.Length + " bytes long");
Console.WriteLine("DIGINFO=" + Cnv.ToHex(abDigInfo));
}