Amazon.Runtime.Internal.Auth.AWS4Signer.ComposeSigningKey C# (CSharp) 메소드

        public static byte[] ComposeSigningKey(string awsSecretAccessKey, string region, string date, string service)
        {
            char[] ksecret = null;

            try
            {
                ksecret = (Scheme + awsSecretAccessKey).ToCharArray();

                var hashDate = ComputeKeyedHash(SignerAlgorithm, Encoding.UTF8.GetBytes(ksecret), Encoding.UTF8.GetBytes(date));
                var hashRegion = ComputeKeyedHash(SignerAlgorithm, hashDate, Encoding.UTF8.GetBytes(region));
                var hashService = ComputeKeyedHash(SignerAlgorithm, hashRegion, Encoding.UTF8.GetBytes(service));
                return ComputeKeyedHash(SignerAlgorithm, hashService, TerminatorBytes);
            }
            finally
            {
                // clean up all secrets, regardless of how initially seeded (for simplicity)
                if (ksecret != null)
                    Array.Clear(ksecret, 0, ksecret.Length);
            }
        }