regionBytes := sumHMAC(date, []byte(region))
	service := sumHMAC(regionBytes, []byte(stype))
	signingKey := sumHMAC(service, []byte("aws4_request"))
	return signingKey
}

// getSignature final signature in hexadecimal form.
func getSignature(signingKey []byte, stringToSign string) string {
	return hex.EncodeToString(sumHMAC(signingKey, []byte(stringToSign)))
}

// Check to see if Policy is signed correctly.

  std::vector<quantfork::QuantizeRegionOp> all_ops;
  all_ops.reserve(128);
  func_.walk([&](quantfork::QuantizeRegionOp op) { all_ops.push_back(op); });
  return all_ops;
}

KernelSpecs::Signature QuantizeContext::GetSignature(
    quantfork::QuantizeRegionOp op) {
  KernelSpecs::Signature signature;
  signature.reserve(op.getInputSpecs().size() + op.getOutputSpecs().size());
  for (int i = 0; i < op.getNumOperands(); ++i) {

		emptySHA256 + "\n" +
		hashedChunk

	// Get hmac signing key.
	signingKey := getSigningKey(cr.cred.SecretKey, cr.seedDate, cr.region, serviceS3)

	// Calculate signature.
	newSignature := getSignature(signingKey, stringToSign)

	return newSignature
}

// getTrailerChunkSignature - get trailer chunk signature.
func (cr *s3ChunkedReader) getTrailerChunkSignature() string {

     *
     * @param methodName
     *            メソッド名。{@literal null}や空文字列であってはいけません
     * @param argTypes
     *            引数型のな並び
     * @return シグニチャの文字列表現
     */
    public static String getSignature(final String methodName, final Class<?>... argTypes) {
        assertArgumentNotEmpty("methodName", methodName);

        final StringBuilder buf = new StringBuilder(100);
        buf.append(methodName).append("(");

					fmt.Sprintf(credentialTemplate, accessKey, now.Format(yyyymmdd), globalMinioDefaultRegion),
				},
				"X-Amz-Date": []string{now.Format(iso8601Format)},
				"X-Amz-Signature": []string{
					getSignature(getSigningKey(globalActiveCred.SecretKey, now,
						globalMinioDefaultRegion, serviceS3), "policy"),
				},
				"Policy": []string{"policy"},
			},
			expected: ErrNone,
		},
	}

  QuantParams GetOperandParams(Operation *op, int index) {
    return states_manager_.GetOperandParams(op, index);
  }

  // Return the signature of the op.
  KernelSpecs::Signature GetSignature(quantfork::QuantizeRegionOp op);

  // A heuristic to get quantization parameters satisfies the same scale
  // constraints:
  // - If there are immutable states,
  //   - use the single input, or,

                throw new GradleException(String.format(
                        "Could not convert javadoc comment to docbook.%nClass: %s%nMethod: %s%nComment: %s",
                        ownerClass.getClassName(), methodMetaData.getSignature(), rawCommentText), e);
            }
        } finally {
            listener.finish();
        }
    }

    private void adjustAccessorComment(DocCommentImpl docComment) {

	// Get signining key.
	signingkey := getSigningKey(secretAccessKey, t, location, "s3")
	// Calculate signature.
	signature := getSignature(signingkey, policyBase64)
	return signature
}

func newPostRequestV2(endPoint, bucketName, objectName string, secretKey string, formInputData map[string]string) (*http.Request, error) {

		for _, ver := range v2 {
			b, _ := json.Marshal(ver.header)
			t.Log(string(b))
			var x xlMetaV2Version
			_, _ = x.unmarshalV(0, ver.meta)
			b, _ = json.Marshal(x)
			t.Log(string(b), x.getSignature())
		}
	}

	for i := range vers {
		t.Run(fmt.Sprintf("non-strict-q%d", i), func(t *testing.T) {
			merged := mergeXLV2Versions(i, false, 0, vers...)
			if len(merged) == 0 {