From f6c92c5e2d87ab1334648b0d1293771de7aae4a5 Mon Sep 17 00:00:00 2001
From: Rutger Broekhoff
Date: Sat, 30 Dec 2023 14:00:34 +0100
Subject: Implement git-lfs-authenticate

---
 vendor/github.com/golang-jwt/jwt/v5/token.go | 100 +++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 vendor/github.com/golang-jwt/jwt/v5/token.go

(limited to 'vendor/github.com/golang-jwt/jwt/v5/token.go')

diff --git a/vendor/github.com/golang-jwt/jwt/v5/token.go b/vendor/github.com/golang-jwt/jwt/v5/token.go
new file mode 100644
index 0000000..352873a
--- /dev/null
+++ b/vendor/github.com/golang-jwt/jwt/v5/token.go
@@ -0,0 +1,100 @@
+package jwt
+
+import (
+	"crypto"
+	"encoding/base64"
+	"encoding/json"
+)
+
+// Keyfunc will be used by the Parse methods as a callback function to supply
+// the key for verification.  The function receives the parsed, but unverified
+// Token.  This allows you to use properties in the Header of the token (such as
+// `kid`) to identify which key to use.
+//
+// The returned interface{} may be a single key or a VerificationKeySet containing
+// multiple keys.
+type Keyfunc func(*Token) (interface{}, error)
+
+// VerificationKey represents a public or secret key for verifying a token's signature.
+type VerificationKey interface {
+	crypto.PublicKey | []uint8
+}
+
+// VerificationKeySet is a set of public or secret keys. It is used by the parser to verify a token.
+type VerificationKeySet struct {
+	Keys []VerificationKey
+}
+
+// Token represents a JWT Token.  Different fields will be used depending on
+// whether you're creating or parsing/verifying a token.
+type Token struct {
+	Raw       string                 // Raw contains the raw token.  Populated when you [Parse] a token
+	Method    SigningMethod          // Method is the signing method used or to be used
+	Header    map[string]interface{} // Header is the first segment of the token in decoded form
+	Claims    Claims                 // Claims is the second segment of the token in decoded form
+	Signature []byte                 // Signature is the third segment of the token in decoded form.  Populated when you Parse a token
+	Valid     bool                   // Valid specifies if the token is valid.  Populated when you Parse/Verify a token
+}
+
+// New creates a new [Token] with the specified signing method and an empty map
+// of claims. Additional options can be specified, but are currently unused.
+func New(method SigningMethod, opts ...TokenOption) *Token {
+	return NewWithClaims(method, MapClaims{}, opts...)
+}
+
+// NewWithClaims creates a new [Token] with the specified signing method and
+// claims. Additional options can be specified, but are currently unused.
+func NewWithClaims(method SigningMethod, claims Claims, opts ...TokenOption) *Token {
+	return &Token{
+		Header: map[string]interface{}{
+			"typ": "JWT",
+			"alg": method.Alg(),
+		},
+		Claims: claims,
+		Method: method,
+	}
+}
+
+// SignedString creates and returns a complete, signed JWT. The token is signed
+// using the SigningMethod specified in the token. Please refer to
+// https://golang-jwt.github.io/jwt/usage/signing_methods/#signing-methods-and-key-types
+// for an overview of the different signing methods and their respective key
+// types.
+func (t *Token) SignedString(key interface{}) (string, error) {
+	sstr, err := t.SigningString()
+	if err != nil {
+		return "", err
+	}
+
+	sig, err := t.Method.Sign(sstr, key)
+	if err != nil {
+		return "", err
+	}
+
+	return sstr + "." + t.EncodeSegment(sig), nil
+}
+
+// SigningString generates the signing string.  This is the most expensive part
+// of the whole deal.  Unless you need this for something special, just go
+// straight for the SignedString.
+func (t *Token) SigningString() (string, error) {
+	h, err := json.Marshal(t.Header)
+	if err != nil {
+		return "", err
+	}
+
+	c, err := json.Marshal(t.Claims)
+	if err != nil {
+		return "", err
+	}
+
+	return t.EncodeSegment(h) + "." + t.EncodeSegment(c), nil
+}
+
+// EncodeSegment encodes a JWT specific base64url encoding with padding
+// stripped. In the future, this function might take into account a
+// [TokenOption]. Therefore, this function exists as a method of [Token], rather
+// than a global function.
+func (*Token) EncodeSegment(seg []byte) string {
+	return base64.RawURLEncoding.EncodeToString(seg)
+}
-- 
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