Пример #1
0
        private byte[] SetServerHandshakeDigest2(byte[] c1, DigestPosition pos)
        {
            var hash = ComputeHandshakeDigest2(c1, pos, c1, GenuineFMSKey);

            Array.Copy(hash, 0, c1, c1.Length - 32, 32);
            return(c1);
        }
Пример #2
0
        private byte[] ComputeHandshakeDigest2(byte[] keyvec, DigestPosition keypos, byte[] vec, byte[] key)
        {
            var doffset = GetDigestOffset(keyvec, keypos);
            var hasher1 = new System.Security.Cryptography.HMACSHA256(key);
            var key2    = hasher1.ComputeHash(keyvec, doffset, 32);
            var hasher2 = new System.Security.Cryptography.HMACSHA256(key2);

            return(hasher2.ComputeHash(vec, 0, vec.Length - 32));
        }
Пример #3
0
        private byte[] SetServerHandshakeDigest1(byte[] vec, DigestPosition pos)
        {
            var doffset = GetDigestOffset(vec, pos);
            var key     = new byte[36];

            Array.Copy(GenuineFMSKey, key, 36);
            var hash = ComputeHandshakeDigest1(vec, key, doffset);

            Array.Copy(hash, 0, vec, doffset, 32);
            return(vec);
        }
Пример #4
0
        private int GetDigestOffset(byte[] vec, DigestPosition pos)
        {
            switch (pos)
            {
            case DigestPosition.First:
                return((vec[8] + vec[9] + vec[10] + vec[11]) % 728 + 12);

            case DigestPosition.Second:
                return((vec[772] + vec[773] + vec[774] + vec[775]) % 728 + 776);

            default:
                throw new ArgumentException();
            }
        }
Пример #5
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        private bool ValidateClientHandshakeDigest2(byte[] vec, byte[] s1, DigestPosition pos)
        {
            var hash = ComputeHandshakeDigest2(s1, pos, vec, GenuineFPKey);

            return(Enumerable.Range(vec.Length - 32, 32).Select(i => vec[i]).SequenceEqual(hash));
        }
Пример #6
0
		private bool ValidateClientHandshakeDigest2(byte[] vec, byte[] s1, DigestPosition pos)
		{
			var hash = ComputeHandshakeDigest2(s1, pos, vec, GenuineFPKey);
			return Enumerable.Range(vec.Length-32, 32).Select(i => vec[i]).SequenceEqual(hash);
		}
Пример #7
0
		private byte[] SetServerHandshakeDigest2(byte[] c1, DigestPosition pos)
		{
			var hash = ComputeHandshakeDigest2(c1, pos, c1, GenuineFMSKey);
			Array.Copy(hash, 0, c1, c1.Length-32, 32);
			return c1;
		}
Пример #8
0
		private byte[] SetServerHandshakeDigest1(byte[] vec, DigestPosition pos)
		{
			var doffset = GetDigestOffset(vec, pos);
			var key = new byte[36];
			Array.Copy(GenuineFMSKey, key, 36);
			var hash = ComputeHandshakeDigest1(vec, key, doffset);
			Array.Copy(hash, 0, vec, doffset, 32);
			return vec;
		}
Пример #9
0
		private byte[] ComputeHandshakeDigest2(byte[] keyvec, DigestPosition keypos, byte[] vec, byte[] key)
		{
			var doffset = GetDigestOffset(keyvec, keypos);
			var hasher1 = new System.Security.Cryptography.HMACSHA256(key);
			var key2 = hasher1.ComputeHash(keyvec, doffset, 32);
			var hasher2 = new System.Security.Cryptography.HMACSHA256(key2);
			return hasher2.ComputeHash(vec, 0, vec.Length-32);
		}
Пример #10
0
		private int GetDigestOffset(byte[] vec, DigestPosition pos)
		{
			switch (pos) {
			case DigestPosition.First:
				return (vec[8]+vec[9]+vec[10]+vec[11]) % 728 + 12;
			case DigestPosition.Second:
				return (vec[772]+vec[773]+vec[774]+vec[775]) % 728 + 776;
			default:
				throw new ArgumentException();
			}
		}