After a week, the token will be expired and the user will not be authorized and will have to sign in again to get a new token. And if the user (or a third party) tried to modify the token to change the expiration, you would be able to discover it, because the signatures would not match.

						</div>
					</div>
					<div class="text-center">
						<button type="submit" name="login"
							class="btn btn-primary btn-block"
							value="<la:message key="labels.login"/>">
							<em class="fa fa-sign-in">
							<la:message key="labels.login" />
						</button>
					</div>
				</la:form>
			</div>
		</div>
	</div>
	<input type="hidden" id="contextPath" value="${contextPath}" />

    } 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();

		valueBuffer.Write([]byte{'\n'})
	}
	sig = sig[len("x-amz-trailer-signature:"):]
	sig = bytes.TrimSpace(sig)
	cr.chunkSHA256Writer.Write(valueBuffer.Bytes())
	wantSig := cr.getTrailerChunkSignature()
	if !compareSignatureV4(string(sig), wantSig) {
		if cr.debug {
			fmt.Printf("signature, want: %q, got %q\nSignature buffer: %q\n", wantSig, string(sig), valueBuffer.String())
		}
		return errSignatureMismatch
	}

    private BigDecimalToDoubleRounder() {}

    @Override
    double roundToDoubleArbitrarily(BigDecimal bigDecimal) {
      return bigDecimal.doubleValue();
    }

    @Override
    int sign(BigDecimal bigDecimal) {
      return bigDecimal.signum();
    }

    @Override
    BigDecimal toX(double d, RoundingMode mode) {
      return new BigDecimal(d);
    }

    @Override

            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() {

    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);
  }

  /**

  * 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).

	// 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 {

						<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"