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1/*
2 * Copyright (c) 2025 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16// [Start sync_symmetry_encrypt_decrypt_sm4]
17import { cryptoFramework } from '@kit.CryptoArchitectureKit';
18import { buffer } from '@kit.ArkTS';
19
20// 加密消息
21function encryptMessage(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) {
22  let cipher = cryptoFramework.createCipher('SM4_128|ECB|PKCS7');
23  cipher.initSync(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, null);
24  let encryptData = cipher.doFinalSync(plainText);
25  return encryptData;
26}
27
28// 解密消息
29function decryptMessage(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) {
30  let decoder = cryptoFramework.createCipher('SM4_128|ECB|PKCS7');
31  decoder.initSync(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, null);
32  let decryptData = decoder.doFinalSync(cipherText);
33  return decryptData;
34}
35
36function genSymKeyByData(symKeyData: Uint8Array) {
37  let symKeyBlob: cryptoFramework.DataBlob = { data: symKeyData };
38  let symGenerator = cryptoFramework.createSymKeyGenerator('SM4_128');
39  let symKey = symGenerator.convertKeySync(symKeyBlob);
40  console.info('convertKeySync success');
41  return symKey;
42}
43
44function main() {
45  let keyData = new Uint8Array([7, 154, 52, 176, 4, 236, 150, 43, 237, 9, 145, 166, 141, 174, 224, 131]);
46  let symKey = genSymKeyByData(keyData);
47  let message = 'This is a test';
48  let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(message, 'utf-8').buffer) };
49  let encryptText = encryptMessage(symKey, plainText);
50  let decryptText = decryptMessage(symKey, encryptText);
51  if (plainText.data.toString() === decryptText.data.toString()) {
52    console.info('decrypt ok');
53    console.info('decrypt plainText: ' + buffer.from(decryptText.data).toString('utf-8'));
54  } else {
55    console.error('decrypt failed');
56  }
57}
58// [End sync_symmetry_encrypt_decrypt_sm4]
59
60@Entry
61@Component
62struct Index {
63  @State message: string = 'Encryption Decryption Guidance SM4 ArkTs';
64
65  build() {
66    Column({ space: 12 }) {
67      Text(this.message).fontSize(20).fontWeight(FontWeight.Bold)
68      Button($r('app.string.call_sm4_ecb_synchronous'))
69        .width('70%')
70        .onClick(() => {
71          try {
72            main();
73            this.message = 'SM4_ECBSuccess';
74          } catch {
75            this.message = 'SM4_ECBFail';
76          }
77        })
78    }
79    .height('100%')
80    .width('100%')
81  }
82}