1 files changed, 81 insertions, 0 deletions
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 00000000..a2f8ddbe
--- /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
+}