Exemplo n.º 1
0
        private static string HashValue(ReadOnlySpan <char> value, uint length, Span <byte> bufferSpan)
        {
            using var hashAlgorithm = SHA256.Create();
            Encoding.ASCII.GetBytes(value, bufferSpan);

            // Hashed output maxes out at 32 bytes @ 256bit/8 so we're safe to use stackalloc
            Span <byte> hash = stackalloc byte[32];

            hashAlgorithm.TryComputeHash(bufferSpan, hash, out int _);

            // Length maxes out at 64 since we throw if options is greater
            return(HexEncoder.Encode(hash.Slice(0, (int)(length / 2))));
        }
Exemplo n.º 2
0
        /// <inheritdoc/>
        public string Create(string value, uint length)
        {
            int len       = (int)length;
            int byteCount = Encoding.ASCII.GetByteCount(value);

            using (var hashAlgorithm = SHA256.Create())
                using (IManagedByteBuffer buffer = this.memoryAllocator.AllocateManagedByteBuffer(byteCount))
                {
                    Encoding.ASCII.GetBytes(value, 0, byteCount, buffer.Array, 0);
                    byte[] hash = hashAlgorithm.ComputeHash(buffer.Array, 0, byteCount);
                    return($"{HexEncoder.Encode(new Span<byte>(hash).Slice(0, len / 2))}");
                }
        }