feat: Support sha512 password encryption algorithm (#2657)

* add sha512 encryption support for password

* fead: add sha512 encryption support for password

cred/sha512-salt.go

@@ -0,0 +1,50 @@
+// Copyright 2024 The Casdoor 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/sha512"
+	"encoding/hex"
+)
+
+type Sha512SaltCredManager struct{}
+
+func getSha512(data []byte) []byte {
+	hash := sha512.Sum512(data)
+	return hash[:]
+}
+
+func getSha512HexDigest(s string) string {
+	b := getSha512([]byte(s))
+	res := hex.EncodeToString(b)
+	return res
+}
+
+func NewSha512SaltCredManager() *Sha512SaltCredManager {
+	cm := &Sha512SaltCredManager{}
+	return cm
+}
+
+func (cm *Sha512SaltCredManager) GetHashedPassword(password string, userSalt string, organizationSalt string) string {
+	res := getSha512HexDigest(password)
+	if organizationSalt != "" {
+		res = getSha512HexDigest(res + organizationSalt)
+	}
+	return res
+}
+
+func (cm *Sha512SaltCredManager) IsPasswordCorrect(plainPwd string, hashedPwd string, userSalt string, organizationSalt string) bool {
+	return hashedPwd == cm.GetHashedPassword(plainPwd, userSalt, organizationSalt)
+}