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/none.go | 50 +++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 vendor/github.com/golang-jwt/jwt/v5/none.go

(limited to 'vendor/github.com/golang-jwt/jwt/v5/none.go')

diff --git a/vendor/github.com/golang-jwt/jwt/v5/none.go b/vendor/github.com/golang-jwt/jwt/v5/none.go
new file mode 100644
index 0000000..685c2ea
--- /dev/null
+++ b/vendor/github.com/golang-jwt/jwt/v5/none.go
@@ -0,0 +1,50 @@
+package jwt
+
+// SigningMethodNone implements the none signing method.  This is required by the spec
+// but you probably should never use it.
+var SigningMethodNone *signingMethodNone
+
+const UnsafeAllowNoneSignatureType unsafeNoneMagicConstant = "none signing method allowed"
+
+var NoneSignatureTypeDisallowedError error
+
+type signingMethodNone struct{}
+type unsafeNoneMagicConstant string
+
+func init() {
+	SigningMethodNone = &signingMethodNone{}
+	NoneSignatureTypeDisallowedError = newError("'none' signature type is not allowed", ErrTokenUnverifiable)
+
+	RegisterSigningMethod(SigningMethodNone.Alg(), func() SigningMethod {
+		return SigningMethodNone
+	})
+}
+
+func (m *signingMethodNone) Alg() string {
+	return "none"
+}
+
+// Only allow 'none' alg type if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Verify(signingString string, sig []byte, key interface{}) (err error) {
+	// Key must be UnsafeAllowNoneSignatureType to prevent accidentally
+	// accepting 'none' signing method
+	if _, ok := key.(unsafeNoneMagicConstant); !ok {
+		return NoneSignatureTypeDisallowedError
+	}
+	// If signing method is none, signature must be an empty string
+	if len(sig) != 0 {
+		return newError("'none' signing method with non-empty signature", ErrTokenUnverifiable)
+	}
+
+	// Accept 'none' signing method.
+	return nil
+}
+
+// Only allow 'none' signing if UnsafeAllowNoneSignatureType is specified as the key
+func (m *signingMethodNone) Sign(signingString string, key interface{}) ([]byte, error) {
+	if _, ok := key.(unsafeNoneMagicConstant); ok {
+		return []byte{}, nil
+	}
+
+	return nil, NoneSignatureTypeDisallowedError
+}
-- 
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