Example #1
0
        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);
        }
Example #2
0
        public void VerifyWithSHA1(byte[] data, byte[] expected)
        {
            BigInteger result = VerifyBI(data);

            byte[] finaldata = RSAUtil.StripPKCS1Pad(result, 1).getBytes();

            if (finaldata.Length != PKIUtil.SHA1_ASN_ID.Length + expected.Length)
            {
                throw new VerifyException("result is too short");
            }
            else
            {
                byte[] r = new byte[finaldata.Length];
                Array.Copy(PKIUtil.SHA1_ASN_ID, 0, r, 0, PKIUtil.SHA1_ASN_ID.Length);
                Array.Copy(expected, 0, r, PKIUtil.SHA1_ASN_ID.Length, expected.Length);
                if (SSHUtil.memcmp(r, finaldata) != 0)
                {
                    throw new VerifyException("failed to verify");
                }
            }
        }