Upgrade to golang-jwt 3.2.2 (#16590)

* Upgrade to golang-jwt 3.2.2

Upgrade to the latest version of golang-jwt

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Forcibly replace the 3.2.1 version of golang-jwt/jwt and increase minimum Go version

Using go.mod we can forcibly replace the 3.2.1 version used by goth to 3.2.2.

Further given golang-jwt/jwts stated policy of only supporting supported go versions
we should just raise our minimal version of go to 1.16 for 1.16 as by time of release
1.15 will be out of support.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* update minimal go required

Signed-off-by: Andrew Thornton <art27@cantab.net>

* update config.yaml

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: 6543 <6543@obermui.de>

9 files changed, 194 insertions, 43 deletions

diff --git a/vendor/github.com/golang-jwt/jwt/.travis.yml b/vendor/github.com/golang-jwt/jwt/.travis.yml
deleted file mode 100644
index 036a862f87..0000000000
--- a/vendor/github.com/golang-jwt/jwt/.travis.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-language: go
-
-script:
-    - go vet ./...
-    - go test -v ./...
-
-go:
-  - 1.7
-  - 1.8
-  - 1.9
-  - 1.10
diff --git a/vendor/github.com/golang-jwt/jwt/README.md b/vendor/github.com/golang-jwt/jwt/README.md
index 13c31c09b6..9b653e46b0 100644
--- a/vendor/github.com/golang-jwt/jwt/README.md
+++ b/vendor/github.com/golang-jwt/jwt/README.md
@@ -9,10 +9,17 @@ A [go](http://www.golang.org) (or 'golang' for search engine friendliness) imple
 
 Future releases will be using the `github.com/golang-jwt/jwt` import path and continue the existing versioning scheme of `v3.x.x+incompatible`. Backwards-compatible patches and fixes will be done on the `v3` release branch, where as new build-breaking features will be developed in a `v4` release, possibly including a SIV-style import path.
 
-**SECURITY NOTICE:** Some older versions of Go have a security issue in the crypto/elliptic. Recommendation is to upgrade to at least 1.8.3. See issue [dgrijalva/jwt-go#216](https://github.com/dgrijalva/jwt-go/issues/216) for more detail.
+**SECURITY NOTICE:** Some older versions of Go have a security issue in the crypto/elliptic. Recommendation is to upgrade to at least 1.15 See issue [dgrijalva/jwt-go#216](https://github.com/dgrijalva/jwt-go/issues/216) for more detail.
 
 **SECURITY NOTICE:** It's important that you [validate the `alg` presented is what you expect](https://auth0.com/blog/critical-vulnerabilities-in-json-web-token-libraries/). This library attempts to make it easy to do the right thing by requiring key types match the expected alg, but you should take the extra step to verify it in your usage.  See the examples provided.
 
+### Supported Go versions
+
+Our support of Go versions is aligned with Go's [version release policy](https://golang.org/doc/devel/release#policy).
+So we will support a major version of Go until there are two newer major releases.
+We no longer support building jwt-go with unsupported Go versions, as these contain security vulnerabilities
+which will not be fixed.
+
 ## What the heck is a JWT?
 
 JWT.io has [a great introduction](https://jwt.io/introduction) to JSON Web Tokens.
diff --git a/vendor/github.com/golang-jwt/jwt/VERSION_HISTORY.md b/vendor/github.com/golang-jwt/jwt/VERSION_HISTORY.md
index dac737bcaa..637f2ba616 100644
--- a/vendor/github.com/golang-jwt/jwt/VERSION_HISTORY.md
+++ b/vendor/github.com/golang-jwt/jwt/VERSION_HISTORY.md
@@ -1,5 +1,12 @@
 ## `jwt-go` Version History
 
+#### 3.2.2
+
+* Starting from this release, we are adopting the policy to support the most 2 recent versions of Go currently available. By the time of this release, this is Go 1.15 and 1.16 ([#28](https://github.com/golang-jwt/jwt/pull/28)).
+* Fixed a potential issue that could occur when the verification of `exp`, `iat` or `nbf` was not required and contained invalid contents, i.e. non-numeric/date. Thanks for @thaJeztah for making us aware of that and @giorgos-f3 for originally reporting it to the formtech fork ([#40](https://github.com/golang-jwt/jwt/pull/40)).
+* Added support for EdDSA / ED25519 ([#36](https://github.com/golang-jwt/jwt/pull/36)).
+* Optimized allocations ([#33](https://github.com/golang-jwt/jwt/pull/33)).
+
 #### 3.2.1
 
 * **Import Path Change**: See MIGRATION_GUIDE.md for tips on updating your code
diff --git a/vendor/github.com/golang-jwt/jwt/ecdsa.go b/vendor/github.com/golang-jwt/jwt/ecdsa.go
index d310af1c7c..15e23435df 100644
--- a/vendor/github.com/golang-jwt/jwt/ecdsa.go
+++ b/vendor/github.com/golang-jwt/jwt/ecdsa.go
@@ -128,18 +128,12 @@ func (m *SigningMethodECDSA) Sign(signingString string, key interface{}) (string
 			keyBytes += 1
 		}
 
-		// We serialize the outpus (r and s) into big-endian byte arrays and pad
-		// them with zeros on the left to make sure the sizes work out. Both arrays
-		// must be keyBytes long, and the output must be 2*keyBytes long.
-		rBytes := r.Bytes()
-		rBytesPadded := make([]byte, keyBytes)
-		copy(rBytesPadded[keyBytes-len(rBytes):], rBytes)
-
-		sBytes := s.Bytes()
-		sBytesPadded := make([]byte, keyBytes)
-		copy(sBytesPadded[keyBytes-len(sBytes):], sBytes)
-
-		out := append(rBytesPadded, sBytesPadded...)
+		// We serialize the outputs (r and s) into big-endian byte arrays
+		// padded with zeros on the left to make sure the sizes work out.
+		// Output must be 2*keyBytes long.
+		out := make([]byte, 2*keyBytes)
+		r.FillBytes(out[0:keyBytes]) // r is assigned to the first half of output.
+		s.FillBytes(out[keyBytes:])  // s is assigned to the second half of output.
 
 		return EncodeSegment(out), nil
 	} else {
diff --git a/vendor/github.com/golang-jwt/jwt/ed25519.go b/vendor/github.com/golang-jwt/jwt/ed25519.go
new file mode 100644
index 0000000000..a2f8ddbe9b
--- /dev/null
+++ b/vendor/github.com/golang-jwt/jwt/ed25519.go
@@ -0,0 +1,81 @@
+package jwt
+
+import (
+	"errors"
+
+	"crypto/ed25519"
+)
+
+var (
+	ErrEd25519Verification = errors.New("ed25519: verification error")
+)
+
+// Implements the EdDSA family
+// Expects ed25519.PrivateKey for signing and ed25519.PublicKey for verification
+type SigningMethodEd25519 struct{}
+
+// Specific instance for EdDSA
+var (
+	SigningMethodEdDSA *SigningMethodEd25519
+)
+
+func init() {
+	SigningMethodEdDSA = &SigningMethodEd25519{}
+	RegisterSigningMethod(SigningMethodEdDSA.Alg(), func() SigningMethod {
+		return SigningMethodEdDSA
+	})
+}
+
+func (m *SigningMethodEd25519) Alg() string {
+	return "EdDSA"
+}
+
+// Implements the Verify method from SigningMethod
+// For this verify method, key must be an ed25519.PublicKey
+func (m *SigningMethodEd25519) Verify(signingString, signature string, key interface{}) error {
+	var err error
+	var ed25519Key ed25519.PublicKey
+	var ok bool
+
+	if ed25519Key, ok = key.(ed25519.PublicKey); !ok {
+		return ErrInvalidKeyType
+	}
+
+	if len(ed25519Key) != ed25519.PublicKeySize {
+		return ErrInvalidKey
+	}
+
+	// Decode the signature
+	var sig []byte
+	if sig, err = DecodeSegment(signature); err != nil {
+		return err
+	}
+
+	// Verify the signature
+	if !ed25519.Verify(ed25519Key, []byte(signingString), sig) {
+		return ErrEd25519Verification
+	}
+
+	return nil
+}
+
+// Implements the Sign method from SigningMethod
+// For this signing method, key must be an ed25519.PrivateKey
+func (m *SigningMethodEd25519) Sign(signingString string, key interface{}) (string, error) {
+	var ed25519Key ed25519.PrivateKey
+	var ok bool
+
+	if ed25519Key, ok = key.(ed25519.PrivateKey); !ok {
+		return "", ErrInvalidKeyType
+	}
+
+	// ed25519.Sign panics if private key not equal to ed25519.PrivateKeySize
+	// this allows to avoid recover usage
+	if len(ed25519Key) != ed25519.PrivateKeySize {
+		return "", ErrInvalidKey
+	}
+
+	// Sign the string and return the encoded result
+	sig := ed25519.Sign(ed25519Key, []byte(signingString))
+	return EncodeSegment(sig), nil
+}
diff --git a/vendor/github.com/golang-jwt/jwt/ed25519_utils.go b/vendor/github.com/golang-jwt/jwt/ed25519_utils.go
new file mode 100644
index 0000000000..c6357275ef
--- /dev/null
+++ b/vendor/github.com/golang-jwt/jwt/ed25519_utils.go
@@ -0,0 +1,64 @@
+package jwt
+
+import (
+	"crypto"
+	"crypto/ed25519"
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+)
+
+var (
+	ErrNotEdPrivateKey = errors.New("Key is not a valid Ed25519 private key")
+	ErrNotEdPublicKey  = errors.New("Key is not a valid Ed25519 public key")
+)
+
+// Parse PEM-encoded Edwards curve private key
+func ParseEdPrivateKeyFromPEM(key []byte) (crypto.PrivateKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKCS8PrivateKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey ed25519.PrivateKey
+	var ok bool
+	if pkey, ok = parsedKey.(ed25519.PrivateKey); !ok {
+		return nil, ErrNotEdPrivateKey
+	}
+
+	return pkey, nil
+}
+
+// Parse PEM-encoded Edwards curve public key
+func ParseEdPublicKeyFromPEM(key []byte) (crypto.PublicKey, error) {
+	var err error
+
+	// Parse PEM block
+	var block *pem.Block
+	if block, _ = pem.Decode(key); block == nil {
+		return nil, ErrKeyMustBePEMEncoded
+	}
+
+	// Parse the key
+	var parsedKey interface{}
+	if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
+		return nil, err
+	}
+
+	var pkey ed25519.PublicKey
+	var ok bool
+	if pkey, ok = parsedKey.(ed25519.PublicKey); !ok {
+		return nil, ErrNotEdPublicKey
+	}
+
+	return pkey, nil
+}
diff --git a/vendor/github.com/golang-jwt/jwt/map_claims.go b/vendor/github.com/golang-jwt/jwt/map_claims.go
index ba290f429a..72c79f92e5 100644
--- a/vendor/github.com/golang-jwt/jwt/map_claims.go
+++ b/vendor/github.com/golang-jwt/jwt/map_claims.go
@@ -34,27 +34,35 @@ func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
 // Compares the exp claim against cmp.
 // If required is false, this method will return true if the value matches or is unset
 func (m MapClaims) VerifyExpiresAt(cmp int64, req bool) bool {
-	switch exp := m["exp"].(type) {
+	exp, ok := m["exp"]
+	if !ok {
+		return !req
+	}
+	switch expType := exp.(type) {
 	case float64:
-		return verifyExp(int64(exp), cmp, req)
+		return verifyExp(int64(expType), cmp, req)
 	case json.Number:
-		v, _ := exp.Int64()
+		v, _ := expType.Int64()
 		return verifyExp(v, cmp, req)
 	}
-	return !req
+	return false
 }
 
 // Compares the iat claim against cmp.
 // If required is false, this method will return true if the value matches or is unset
 func (m MapClaims) VerifyIssuedAt(cmp int64, req bool) bool {
-	switch iat := m["iat"].(type) {
+	iat, ok := m["iat"]
+	if !ok {
+		return !req
+	}
+	switch iatType := iat.(type) {
 	case float64:
-		return verifyIat(int64(iat), cmp, req)
+		return verifyIat(int64(iatType), cmp, req)
 	case json.Number:
-		v, _ := iat.Int64()
+		v, _ := iatType.Int64()
 		return verifyIat(v, cmp, req)
 	}
-	return !req
+	return false
 }
 
 // Compares the iss claim against cmp.
@@ -67,14 +75,18 @@ func (m MapClaims) VerifyIssuer(cmp string, req bool) bool {
 // Compares the nbf claim against cmp.
 // If required is false, this method will return true if the value matches or is unset
 func (m MapClaims) VerifyNotBefore(cmp int64, req bool) bool {
-	switch nbf := m["nbf"].(type) {
+	nbf, ok := m["nbf"]
+	if !ok {
+		return !req
+	}
+	switch nbfType := nbf.(type) {
 	case float64:
-		return verifyNbf(int64(nbf), cmp, req)
+		return verifyNbf(int64(nbfType), cmp, req)
 	case json.Number:
-		v, _ := nbf.Int64()
+		v, _ := nbfType.Int64()
 		return verifyNbf(v, cmp, req)
 	}
-	return !req
+	return false
 }
 
 // Validates time based claims "exp, iat, nbf".
diff --git a/vendor/github.com/golang-jwt/jwt/token.go b/vendor/github.com/golang-jwt/jwt/token.go
index 99868d29b9..6b30ced120 100644
--- a/vendor/github.com/golang-jwt/jwt/token.go
+++ b/vendor/github.com/golang-jwt/jwt/token.go
@@ -95,14 +95,10 @@ func ParseWithClaims(tokenString string, claims Claims, keyFunc Keyfunc) (*Token
 
 // Encode JWT specific base64url encoding with padding stripped
 func EncodeSegment(seg []byte) string {
-	return strings.TrimRight(base64.URLEncoding.EncodeToString(seg), "=")
+	return base64.RawURLEncoding.EncodeToString(seg)
 }
 
 // Decode JWT specific base64url encoding with padding stripped
 func DecodeSegment(seg string) ([]byte, error) {
-	if l := len(seg) % 4; l > 0 {
-		seg += strings.Repeat("=", 4-l)
-	}
-
-	return base64.URLEncoding.DecodeString(seg)
+	return base64.RawURLEncoding.DecodeString(seg)
 }
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 32251f41e0..2a616ad9cd 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -428,7 +428,7 @@ github.com/gogs/cron
 # github.com/gogs/go-gogs-client v0.0.0-20210131175652-1d7215cd8d85
 ## explicit
 github.com/gogs/go-gogs-client
-# github.com/golang-jwt/jwt v3.2.1+incompatible
+# github.com/golang-jwt/jwt v3.2.2+incompatible
 ## explicit
 github.com/golang-jwt/jwt
 # github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe
@@ -1053,3 +1053,4 @@ xorm.io/xorm/names
 xorm.io/xorm/schemas
 xorm.io/xorm/tags
 # github.com/hashicorp/go-version => github.com/6543/go-version v1.3.1
+# github.com/golang-jwt/jwt v3.2.1+incompatible => github.com/golang-jwt/jwt v3.2.2+incompatible