Authorize.NET provides C# code to convert the Signature Key to a Byte Array and calculate the HMAC-SHA512 value. Their example code is using lambda coding in C#. Can someone provide a Java equivalent example of this? I have non-lambda Java version working, but I would like to know how to do a Java lambda version.
I came up with the following, but it won't work because the .toArray() method returns an int array, not a byte array:
byte[] k = java.util.stream.IntStream.range(0, binSigKey.length)
.filter(i -> i % 2 == 0)
.map(i -> Byte.parseByte(signatureKey.substring(i, i + 2), 16))
.toArray();
Original C# version provided by Authorize.NET as an example:
byte[] k = Enumerable.Range(0, key.Length)
.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(key.Substring(x, 2), 16))
.ToArray();
Thanks.
