// according to the AWS S3 signature V4 spec.
func compareSignatureV4(sig1, sig2 string) bool {
	// The CTC using []byte(str) works because the hex encoding
	// is unique for a sequence of bytes. See also compareSignatureV2.
	return subtle.ConstantTimeCompare([]byte(sig1), []byte(sig2)) == 1
}

// doesPolicySignatureMatch - Verify query headers with post policy

If you didn't sign off your commits before creating the pull request, you can fix that after the fact.

To sign off a single commit:

`git commit --amend --signoff`

To sign off one or multiple commits:

`git rebase --signoff origin/master`

Then force push your branch:

	offsetBegin := int64(-1)
	// Convert offsetBeginString only if its not empty.
	if len(offsetBeginString) > 0 {
		if offsetBeginString[0] == '+' {
			return nil, fmt.Errorf("Byte position ('%s') must not have a sign", offsetBeginString)
		} else if offsetBegin, err = strconv.ParseInt(offsetBeginString, 10, 64); err != nil {
			return nil, fmt.Errorf("'%s' does not have a valid first byte position value", rangeString)

            get() = firReturnTargets.isNotEmpty() || firLoopJumpTargets.isNotEmpty()

        val hasMultipleJumpKinds: Boolean
            get() = (firReturnExpressions.size.sign + firBreakExpressions.size.sign + firContinueExpressions.size.sign) > 1

        val variableReassignments = mutableListOf<VariableReassignment>()

        val firReturnExpressions = mutableListOf<FirReturnExpression>()

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.

		field, err = dc.ReadMapKeyPtr()
		if err != nil {
			err = msgp.WrapError(err)
			return
		}
		switch msgp.UnsafeString(field) {
		case "Sign":
			z.Sign, err = dc.ReadBytes(z.Sign)
			if err != nil {
				err = msgp.WrapError(err, "Sign")
				return
			}
		case "OldDataDir":
			z.OldDataDir, err = dc.ReadString()
			if err != nil {
				err = msgp.WrapError(err, "OldDataDir")

	// 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 {

    // > There are 12 characters with special meanings:
    // > - the backslash \,
    // > - the caret ^,
    // > - the dollar sign $,
    // > - the period or dot .,
    // > - the vertical bar or pipe symbol |,
    // > - the question mark ?,
    // > - the asterisk or star *,
    // > - the plus sign +,
    // > - the opening parenthesis (,
    // > - the closing parenthesis ),
    // > - and the opening square bracket [,

//   - on rewrite dataDir on disk that must be additionally purged
//     only after as a 2-phase call, allowing the older dataDir to
//     hang-around in-case we need some form of recovery.
type RenameDataResp struct {
	Sign       []byte
	OldDataDir string // contains '<uuid>', it is designed to be passed as value to Delete(bucket, pathJoin(object, dataDir))
}

// LocalDiskIDs - GetLocalIDs response.
type LocalDiskIDs struct {

					<controlDir>${project.build.directory}/generated-packaging/deb/scripts</controlDir>
					<!--
					<signPackage>${deb.sign}</signPackage>
					<keyring>${gpg.keyring}</keyring>
					key>${gpg.key}</key>
					<passphrase>${gpg.passphrase}</passphrase>
					<signMethod>${deb.sign.method}</signMethod>
					-->
					<dataSet>
						<!-- Add app directory -->
						<data>
							<type>directory</type>