init

src/main/java/com/senmesh/common/util/AESUtils.java

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+package com.senmesh.common.util;
+
+import java.nio.charset.StandardCharsets;
+import java.security.Security;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
+import org.springframework.util.Base64Utils;
+
+
+/**
+ * @author sr on 2024-02-22 
+ */
+public class AESUtils {
+
+  public static final String TRANSFORM_ECB_5 = "AES/ECB/PKCS5Padding";
+  public static final String TRANSFORM_ECB_7 = "AES/ECB/PKCS7Padding";
+  public static final String TRANSFORM_ECB = "AES/ECB/NoPadding";
+
+  static {
+    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
+  }
+  
+  public static Cipher getCipher(String transform) throws Exception {
+    if (TRANSFORM_ECB_7.equals(transform)) {
+      return Cipher.getInstance(transform, "BC");
+    } else {
+      return Cipher.getInstance(transform);
+    }
+  }
+
+  public static String encrypt(String input, String key, String transform) throws Exception {
+    Cipher cipher = getCipher(transform);
+    SecretKey keySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
+    cipher.init(Cipher.ENCRYPT_MODE, keySpec);
+    return Base64Utils.encodeToString(cipher.doFinal(input.getBytes(StandardCharsets.UTF_8)));
+  }
+
+  public static String decrypt(String input, String key, String transform)
+      throws Exception {
+    Cipher cipher = getCipher(transform);
+    SecretKey keySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
+    cipher.init(Cipher.DECRYPT_MODE, keySpec);
+    return new String(cipher.doFinal(Base64Utils.decode(input.getBytes(StandardCharsets.UTF_8))),
+        StandardCharsets.UTF_8);
+  }
+
+}