let HMACStream (key: byte[]) (outputStream: Stream) : Stream * HMACSHA256 =
assert (key.Length = 32)
let hmac = new HMACSHA256 (key)
- new CryptoStream (outputStream, hmac, CryptoStreamMode.Write) :> Stream, hmac
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+ new CryptoStream (outputStream, hmac, CryptoStreamMode.Write) :> Stream, hmac
+
+ let ComputeHMAC (key: byte[]) (inputStream: Stream) : byte[] =
+ assert (key.Length = 32)
+ let hmac = new HMACSHA256 (key)
+ hmac.ComputeHash inputStream
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