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Compatibility with jwt-go (golang-jwt) v5
Includes the StandardClaims implementation from jwt-go v4, where it was marked as deprecated before removed in v5. The box backend needs this. See #7115
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@ -27,7 +27,6 @@ import (
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"sync/atomic"
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"time"
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"github.com/golang-jwt/jwt/v4"
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"github.com/rclone/rclone/backend/box/api"
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"github.com/rclone/rclone/fs"
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"github.com/rclone/rclone/fs/config"
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@ -77,7 +76,7 @@ var (
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)
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type boxCustomClaims struct {
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jwt.StandardClaims
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jwtutil.StandardClaims
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BoxSubType string `json:"box_sub_type,omitempty"`
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}
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@ -225,10 +224,8 @@ func getClaims(boxConfig *api.ConfigJSON, boxSubType string) (claims *boxCustomC
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}
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claims = &boxCustomClaims{
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//lint:ignore SA1019 since we need to use jwt.StandardClaims even if deprecated in jwt-go v4 until a more permanent solution is ready in time before jwt-go v5 where it is removed entirely
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//nolint:staticcheck // Don't include staticcheck when running golangci-lint to avoid SA1019
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StandardClaims: jwt.StandardClaims{
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Id: val,
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StandardClaims: jwtutil.StandardClaims{
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ID: val,
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Issuer: boxConfig.BoxAppSettings.ClientID,
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Subject: boxConfig.EnterpriseID,
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Audience: tokenURL,
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160
lib/jwtutil/claims.go
Normal file
160
lib/jwtutil/claims.go
Normal file
@ -0,0 +1,160 @@
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package jwtutil
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import (
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"crypto/subtle"
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v4"
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)
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// StandardClaims implementation from jwt-go v4, where it was marked as deprecated
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// before removed in v5.
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// See: https://github.com/golang-jwt/jwt/blob/v4/claims.go
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//
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// StandardClaims are a structured version of the JWT Claims Set, as referenced at
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// https://datatracker.ietf.org/doc/html/rfc7519#section-4. They do not follow the
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// specification exactly, since they were based on an earlier draft of the
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// specification and not updated. The main difference is that they only
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// support integer-based date fields and singular audiences. This might lead to
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// incompatibilities with other JWT implementations. The use of this is discouraged, instead
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// the newer RegisteredClaims struct should be used.
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type StandardClaims struct {
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Audience string `json:"aud,omitempty"`
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ExpiresAt int64 `json:"exp,omitempty"`
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ID string `json:"jti,omitempty"`
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IssuedAt int64 `json:"iat,omitempty"`
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Issuer string `json:"iss,omitempty"`
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NotBefore int64 `json:"nbf,omitempty"`
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Subject string `json:"sub,omitempty"`
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}
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// Valid validates time based claims "exp, iat, nbf". There is no accounting for clock skew.
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// As well, if any of the above claims are not in the token, it will still
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// be considered a valid claim.
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func (c StandardClaims) Valid() error {
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vErr := new(jwt.ValidationError)
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now := jwt.TimeFunc().Unix()
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// The claims below are optional, by default, so if they are set to the
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// default value in Go, let's not fail the verification for them.
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if !c.VerifyExpiresAt(now, false) {
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delta := time.Unix(now, 0).Sub(time.Unix(c.ExpiresAt, 0))
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vErr.Inner = fmt.Errorf("%s by %s", jwt.ErrTokenExpired, delta)
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vErr.Errors |= jwt.ValidationErrorExpired
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}
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if !c.VerifyIssuedAt(now, false) {
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vErr.Inner = jwt.ErrTokenUsedBeforeIssued
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vErr.Errors |= jwt.ValidationErrorIssuedAt
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}
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if !c.VerifyNotBefore(now, false) {
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vErr.Inner = jwt.ErrTokenNotValidYet
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vErr.Errors |= jwt.ValidationErrorNotValidYet
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}
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if vErr.Errors == 0 {
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return nil
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}
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return vErr
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}
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// VerifyAudience compares the aud claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyAudience(cmp string, req bool) bool {
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return verifyAud([]string{c.Audience}, cmp, req)
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}
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// VerifyExpiresAt compares the exp claim against cmp (cmp < exp).
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// If req is false, it will return true, if exp is unset.
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func (c *StandardClaims) VerifyExpiresAt(cmp int64, req bool) bool {
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if c.ExpiresAt == 0 {
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return verifyExp(nil, time.Unix(cmp, 0), req)
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}
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t := time.Unix(c.ExpiresAt, 0)
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return verifyExp(&t, time.Unix(cmp, 0), req)
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}
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// VerifyIssuedAt compares the iat claim against cmp (cmp >= iat).
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// If req is false, it will return true, if iat is unset.
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func (c *StandardClaims) VerifyIssuedAt(cmp int64, req bool) bool {
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if c.IssuedAt == 0 {
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return verifyIat(nil, time.Unix(cmp, 0), req)
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}
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t := time.Unix(c.IssuedAt, 0)
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return verifyIat(&t, time.Unix(cmp, 0), req)
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}
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// VerifyNotBefore compares the nbf claim against cmp (cmp >= nbf).
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// If req is false, it will return true, if nbf is unset.
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func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
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if c.NotBefore == 0 {
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return verifyNbf(nil, time.Unix(cmp, 0), req)
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}
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t := time.Unix(c.NotBefore, 0)
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return verifyNbf(&t, time.Unix(cmp, 0), req)
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}
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// VerifyIssuer compares the iss claim against cmp.
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// If required is false, this method will return true if the value matches or is unset
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func (c *StandardClaims) VerifyIssuer(cmp string, req bool) bool {
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return verifyIss(c.Issuer, cmp, req)
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}
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// ----- helpers
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func verifyAud(aud []string, cmp string, required bool) bool {
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if len(aud) == 0 {
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return !required
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}
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// use a var here to keep constant time compare when looping over a number of claims
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result := false
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var stringClaims string
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for _, a := range aud {
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if subtle.ConstantTimeCompare([]byte(a), []byte(cmp)) != 0 {
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result = true
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}
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stringClaims = stringClaims + a
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}
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// case where "" is sent in one or many aud claims
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if len(stringClaims) == 0 {
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return !required
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}
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return result
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}
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func verifyExp(exp *time.Time, now time.Time, required bool) bool {
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if exp == nil {
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return !required
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}
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return now.Before(*exp)
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}
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func verifyIat(iat *time.Time, now time.Time, required bool) bool {
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if iat == nil {
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return !required
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}
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return now.After(*iat) || now.Equal(*iat)
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}
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func verifyNbf(nbf *time.Time, now time.Time, required bool) bool {
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if nbf == nil {
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return !required
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}
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return now.After(*nbf) || now.Equal(*nbf)
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}
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func verifyIss(iss string, cmp string, required bool) bool {
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if iss == "" {
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return !required
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}
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return subtle.ConstantTimeCompare([]byte(iss), []byte(cmp)) != 0
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}
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