testMessage.setBytesWritten(10);
            testMessage.setDigest(mockDigest);

            int len = testMessage.encode(buffer, 0);

            verify(mockDigest).sign(eq(buffer), eq(0), anyInt(), eq(testMessage), isNull());
        }

        @Test
        @DisplayName("Should retain payload when requested")
        void testEncodeRetainPayload() {

	// Save signature finally.
	req.URL.RawQuery += "&Signature=" + url.QueryEscape(signature)
	return nil
}

// Sign given request using Signature V2.
func signRequestV2(req *http.Request, accessKey, secretKey string) error {
	signer.SignV2(*req, accessKey, secretKey, false)
	return nil
}

// Sign given request using Signature V4.
func signRequestV4(req *http.Request, accessKey, secretKey string) error {

    } else {
      return new BigInteger(digits, RANDOM_SOURCE).setBit(digits);
    }
  }

  /**
   * Equivalent to calling randomPositiveBigInteger(numBits) and then flipping the sign with 50%
   * probability.
   */
  static BigInteger randomNonZeroBigInteger(int numBits) {
    BigInteger result = randomPositiveBigInteger(numBits);
    return RANDOM_SOURCE.nextBoolean() ? result : result.negate();

  // The mask for the exponent, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long EXPONENT_MASK = 0x7ff0000000000000L;

  // The mask for the sign, according to the {@link
  // Double#doubleToRawLongBits(double)} spec.
  static final long SIGN_MASK = 0x8000000000000000L;

  static final int SIGNIFICAND_BITS = 52;

  static final int EXPONENT_BIAS = 1023;

  * If you work for a company that wants to allow you to contribute your work, then you'll need to sign a [corporate CLA](https://code.google.com/legal/corporate-cla-v1.0.html).

						<c:when test="${ pageLoginLink }">
							<li class="nav-item"><la:link href="/login"
									styleClass="nav-link  " role="button" aria-haspopup="true"
									aria-expanded="false">
									<em class="fa fa-fw fa-sign-in">
									<span><la:message key="labels.login" /></span>
								</la:link></li>
						</c:when>
					</c:choose>
					<li class="nav-item"><la:link href="/help" styleClass="nav-link" role="help" aria-haspopup="true"

						<c:when test="${ pageLoginLink }">
							<li class="nav-item"><la:link href="/login"
									styleClass="nav-link  " role="button" aria-haspopup="true"
									aria-expanded="false">
									<em class="fa fa-fw fa-sign-in">
									<span><la:message key="labels.login" /></span>
								</la:link></li>
						</c:when>
					</c:choose>
					<li class="nav-item"><la:link href="/help" styleClass="nav-link" role="help" aria-haspopup="true"

    long naiveSum = a + b;
    if ((a ^ b) < 0 | (a ^ naiveSum) >= 0) {
      // If a and b have different signs or a has the same sign as the result then there was no
      // overflow, return.
      return naiveSum;
    }
    // we did over/under flow, if the sign is negative we should return MAX otherwise MIN
    return Long.MAX_VALUE + ((naiveSum >>> (Long.SIZE - 1)) ^ 1);
  }

  /**

// getChunkSignature - get chunk signature.
// Does not update anything in cr.
func (cr *s3ChunkedReader) getChunkSignature() string {
	hashedChunk := hex.EncodeToString(cr.chunkSHA256Writer.Sum(nil))

	// Calculate string to sign.
	alg := signV4ChunkedAlgorithm + "\n"
	stringToSign := alg +
		cr.seedDate.Format(iso8601Format) + "\n" +
		getScope(cr.seedDate, cr.region) + "\n" +
		cr.seedSignature + "\n" +
		emptySHA256 + "\n" +
		hashedChunk

	// Verify finally if signature is same.

	// Get canonical request.
	presignedCanonicalReq := getCanonicalRequest(extractedSignedHeaders, hashedPayload, encodedQuery, req.URL.Path, req.Method)

	// Get string to sign from canonical request.
	presignedStringToSign := getStringToSign(presignedCanonicalReq, t, pSignValues.Credential.getScope())

	// Get hmac presigned signing key.