public byte[] sign()
{
//byte[] sig=signature.sign();
cs.Close();
System.Security.Cryptography.DSACryptoServiceProvider DSA = new System.Security.Cryptography.DSACryptoServiceProvider();
DSA.ImportParameters(DSAKeyInfo);
System.Security.Cryptography.DSASignatureFormatter DSAFormatter = new System.Security.Cryptography.DSASignatureFormatter(DSA);
DSAFormatter.SetHashAlgorithm("SHA1");
byte[] sig =DSAFormatter.CreateSignature( sha1 );
return sig;
}
public byte[] sign()
{
//byte[] sig=signature.sign();
cs.Close();
System.Security.Cryptography.DSACryptoServiceProvider DSA = new System.Security.Cryptography.DSACryptoServiceProvider();
DSA.ImportParameters(DSAKeyInfo);
System.Security.Cryptography.DSASignatureFormatter DSAFormatter = new System.Security.Cryptography.DSASignatureFormatter(DSA);
DSAFormatter.SetHashAlgorithm("SHA1");
byte[] sig = DSAFormatter.CreateSignature(sha1);
return(sig);
}
//This method will probably won't work, we need to get rid of the ASN.1 format (Tamir)
public byte[] sign()
{
//byte[] sig=signature.sign();
cs.Close();
System.Security.Cryptography.DSACryptoServiceProvider DSA = new System.Security.Cryptography.DSACryptoServiceProvider();
DSA.ImportParameters(DSAKeyInfo);
System.Security.Cryptography.DSASignatureFormatter DSAFormatter = new System.Security.Cryptography.DSASignatureFormatter(DSA);
DSAFormatter.SetHashAlgorithm("SHA1");
byte[] sig =DSAFormatter.CreateSignature( sha1 );
/*
System.out.print("sign["+sig.length+"] ");
for(int i=0; i<sig.length;i++){
System.out.print(Integer.toHexString(sig[i]&0xff)+":");
}
System.out.println("");
*/
// sig is in ASN.1
// SEQUENCE::={ r INTEGER, s INTEGER }
int len=0;
int index=3;
len=sig[index++]&0xff;
//System.out.println("! len="+len);
byte[] r=new byte[len];
Array.Copy(sig, index, r, 0, r.Length);
index=index+len+1;
len=sig[index++]&0xff;
//System.out.println("!! len="+len);
byte[] s=new byte[len];
Array.Copy(sig, index, s, 0, s.Length);
byte[] result=new byte[40];
// result must be 40 bytes, but length of r and s may not be 20 bytes
Array.Copy(r, (r.Length>20)?1:0,
result, (r.Length>20)?0:20-r.Length,
(r.Length>20)?20:r.Length);
Array.Copy(s, (s.Length>20)?1:0,
result, (s.Length>20)?20:40-s.Length,
(s.Length>20)?20:s.Length);
// System.arraycopy(sig, (sig[3]==20?4:5), result, 0, 20);
// System.arraycopy(sig, sig.length-20, result, 20, 20);
return result;
}
