public byte[] SignWithSHA1(byte[] data)
{
byte[] hash = new SHA1CryptoServiceProvider().ComputeHash(data);
byte[] buf = new byte[hash.Length + PKIUtil.SHA1_ASN_ID.Length];
Array.Copy(PKIUtil.SHA1_ASN_ID, 0, buf, 0, PKIUtil.SHA1_ASN_ID.Length);
Array.Copy(hash, 0, buf, PKIUtil.SHA1_ASN_ID.Length, hash.Length);
BigInteger x = new BigInteger(buf);
//Debug.WriteLine(x.ToHexString());
int padLen = (_publickey._n.bitCount() + 7) / 8;
x = RSAUtil.PKCS1PadType1(x, padLen);
byte[] result = Sign(x.getBytes());
return(result);
}
