feat: init commit

src/main/java/xin/merlin/myblog_server/utils/SHA256Util.java

@@ -0,0 +1,54 @@
+package xin.merlin.myblog_server.utils;
+
+import org.springframework.stereotype.Component;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+@Component
+public class SHA256Util {
+    /**
+     * 对输入字符串进行SHA-256加密
+     * @param input 输入字符串
+     * @return 加密后的十六进制字符串
+     */
+    public String encryptSHA256(String input) {
+        try {
+            MessageDigest digest = MessageDigest.getInstance("SHA-256");
+            byte[] encodedhash = digest.digest(input.getBytes());
+            return bytesToHex(encodedhash);
+        } catch (NoSuchAlgorithmException e) {
+            throw new RuntimeException("SHA-256 algorithm not found", e);
+        }
+    }
+
+    /**
+     * 将字节数组转换为十六进制字符串
+     * @param hash 字节数组
+     * @return 十六进制字符串
+     */
+    private String bytesToHex(byte[] hash) {
+        StringBuilder hexString = new StringBuilder(2 * hash.length);
+        for (int i = 0; i < hash.length; i++) {
+            String hex = Integer.toHexString(0xff & hash[i]);
+            if (hex.length() == 1) {
+                hexString.append('0');
+            }
+            hexString.append(hex);
+        }
+        return hexString.toString();
+    }
+
+    /**
+     * 使用用户ID生成盐值，并对密码进行加密
+     * @param password 用户输入的密码
+     * @param userId 用户ID
+     * @return 加密后的密码哈希值
+     */
+    public String encryptPassword(String password, String userId) {
+        // 先对用户ID进行SHA-256加密，得到盐值
+        String salt = encryptSHA256(userId);
+        // 将盐值与密码拼接后进行SHA-256加密
+        return encryptSHA256(salt +salt + password + salt);
+    }
+}