snapshot of https://github.com/ory/keto.git (master, 2026-09-16; blobs > 131072B omitted)

oryx/josex/utils.go

@@ -0,0 +1,103 @@
+/*-
+ * Copyright 2019 Square Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package josex
+
+import (
+	"crypto/x509"
+	"encoding/pem"
+	"errors"
+	"fmt"
+
+	"github.com/go-jose/go-jose/v3"
+)
+
+// LoadJSONWebKey returns a *jose.JSONWebKey for a given JSON string.
+func LoadJSONWebKey(json []byte, pub bool) (*jose.JSONWebKey, error) {
+	var jwk jose.JSONWebKey
+	err := jwk.UnmarshalJSON(json)
+	if err != nil {
+		return nil, err
+	}
+	if !jwk.Valid() {
+		return nil, errors.New("invalid JWK key")
+	}
+	if jwk.IsPublic() != pub {
+		return nil, errors.New("priv/pub JWK key mismatch")
+	}
+	return &jwk, nil
+}
+
+// LoadPublicKey loads a public key from PEM/DER/JWK-encoded data.
+func LoadPublicKey(data []byte) (interface{}, error) {
+	input := data
+
+	block, _ := pem.Decode(data)
+	if block != nil {
+		input = block.Bytes
+	}
+
+	// Try to load SubjectPublicKeyInfo
+	pub, err0 := x509.ParsePKIXPublicKey(input)
+	if err0 == nil {
+		return pub, nil
+	}
+
+	cert, err1 := x509.ParseCertificate(input)
+	if err1 == nil {
+		return cert.PublicKey, nil
+	}
+
+	jwk, err2 := LoadJSONWebKey(data, true)
+	if err2 == nil {
+		return jwk, nil
+	}
+
+	return nil, fmt.Errorf("square/go-jose: parse error, got '%s', '%s' and '%s'", err0, err1, err2)
+}
+
+// LoadPrivateKey loads a private key from PEM/DER/JWK-encoded data.
+func LoadPrivateKey(data []byte) (interface{}, error) {
+	input := data
+
+	block, _ := pem.Decode(data)
+	if block != nil {
+		input = block.Bytes
+	}
+
+	var priv interface{}
+	priv, err0 := x509.ParsePKCS1PrivateKey(input)
+	if err0 == nil {
+		return priv, nil
+	}
+
+	priv, err1 := x509.ParsePKCS8PrivateKey(input)
+	if err1 == nil {
+		return priv, nil
+	}
+
+	priv, err2 := x509.ParseECPrivateKey(input)
+	if err2 == nil {
+		return priv, nil
+	}
+
+	jwk, err3 := LoadJSONWebKey(input, false)
+	if err3 == nil {
+		return jwk, nil
+	}
+
+	return nil, fmt.Errorf("square/go-jose: parse error, got '%s', '%s', '%s' and '%s'", err0, err1, err2, err3)
+}