> + }
> +
> + byte[] hmacSHA256(String toSign, byte[] key) {
> + try {
> + ByteProcessor<byte[]> hmacSHA256 =
> asByteProcessor(crypto.hmacSHA256(key));
> + return readBytes(toInputStream(toSign), hmacSHA256);
> + } catch (IOException e) {
> + throw new HttpException("read bytes error", e);
> + } catch (InvalidKeyException e) {
> + throw new HttpException("invalid key", e);
> + }
> + }
> +
> + protected byte[] hash(InputStream input) throws HTTPException {
> + try {
> + MessageDigest md = MessageDigest.getInstance("SHA-256");
ok. Hashing.sha256 is same as MessageDigest
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