1 files changed, 79 insertions, 0 deletions

diff --git a/vendor/github.com/golang-jwt/jwt/v5/ed25519.go b/vendor/github.com/golang-jwt/jwt/v5/ed25519.go
new file mode 100644
index 0000000..c213811
--- /dev/null
+++ b/vendor/github.com/golang-jwt/jwt/v5/ed25519.go
@@ -0,0 +1,79 @@
+package jwt
+
+import (
+        "crypto"
+        "crypto/ed25519"
+        "crypto/rand"
+        "errors"
+)
+
+var (
+        ErrEd25519Verification = errors.New("ed25519: verification error")
+)
+
+// SigningMethodEd25519 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"
+}
+
+// Verify implements token verification for the SigningMethod.
+// For this verify method, key must be an ed25519.PublicKey
+func (m *SigningMethodEd25519) Verify(signingString string, sig []byte, key interface{}) error {
+        var ed25519Key ed25519.PublicKey
+        var ok bool
+
+        if ed25519Key, ok = key.(ed25519.PublicKey); !ok {
+                return newError("Ed25519 verify expects ed25519.PublicKey", ErrInvalidKeyType)
+        }
+
+        if len(ed25519Key) != ed25519.PublicKeySize {
+                return ErrInvalidKey
+        }
+
+        // Verify the signature
+        if !ed25519.Verify(ed25519Key, []byte(signingString), sig) {
+                return ErrEd25519Verification
+        }
+
+        return nil
+}
+
+// Sign implements token signing for the SigningMethod.
+// For this signing method, key must be an ed25519.PrivateKey
+func (m *SigningMethodEd25519) Sign(signingString string, key interface{}) ([]byte, error) {
+        var ed25519Key crypto.Signer
+        var ok bool
+
+        if ed25519Key, ok = key.(crypto.Signer); !ok {
+                return nil, newError("Ed25519 sign expects crypto.Signer", ErrInvalidKeyType)
+        }
+
+        if _, ok := ed25519Key.Public().(ed25519.PublicKey); !ok {
+                return nil, ErrInvalidKey
+        }
+
+        // Sign the string and return the result. ed25519 performs a two-pass hash
+        // as part of its algorithm. Therefore, we need to pass a non-prehashed
+        // message into the Sign function, as indicated by crypto.Hash(0)
+        sig, err := ed25519Key.Sign(rand.Reader, []byte(signingString), crypto.Hash(0))
+        if err != nil {
+                return nil, err
+        }
+
+        return sig, nil
+}