Add CredManager.

cred/manager.go

@@ -0,0 +1,29 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// 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 cred
+
+type CredManager interface {
+	GetSealedPassword(password string, userSalt string, organizationSalt string) string
+}
+
+func GetCredManager(passwordType string) CredManager {
+	if passwordType == "plain" {
+		return NewPlainCredManager()
+	} else if passwordType == "salt" {
+		return NewSha256SaltCredManager()
+	}
+
+	return nil
+}

cred/plain.go

@@ -0,0 +1,26 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// 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 cred
+
+type PlainCredManager struct{}
+
+func NewPlainCredManager() *PlainCredManager {
+	cm := &PlainCredManager{}
+	return cm
+}
+
+func (cm *PlainCredManager) GetSealedPassword(password string, userSalt string, organizationSalt string) string {
+	return password
+}

cred/sha256-salt.go

@@ -0,0 +1,44 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// 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 cred
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+)
+
+type Sha256SaltCredManager struct{}
+
+func getSha256(data []byte) []byte {
+	hash := sha256.Sum256(data)
+	return hash[:]
+}
+
+func getSha256HexDigest(s string) string {
+	b := getSha256([]byte(s))
+	res := hex.EncodeToString(b)
+	return res
+}
+
+func NewSha256SaltCredManager() *Sha256SaltCredManager {
+	cm := &Sha256SaltCredManager{}
+	return cm
+}
+
+func (cm *Sha256SaltCredManager) GetSealedPassword(password string, userSalt string, organizationSalt string) string {
+	hash := getSha256HexDigest(password)
+	res := getSha256HexDigest(hash + organizationSalt)
+	return res
+}

cred/sha256-salt_test.go

@@ -0,0 +1,27 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// 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 cred
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestGetSaltedPassword(t *testing.T) {
+	password := "123456"
+	salt := "123"
+	cm := NewSha256SaltCredManager()
+	fmt.Printf("%s -> %s\n", password, cm.GetSealedPassword(password, "", salt))
+}