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1# 使用RSA私钥进行编码解码(ArkTS)
2
3<!--Kit: Crypto Architecture Kit-->
4<!--Subsystem: Security-->
5<!--Owner: @zxz--3-->
6<!--Designer: @lanming-->
7<!--Tester: @PAFT-->
8<!--Adviser: @zengyawen-->
9
10**编码**
11
121. 调用[cryptoFramework.createAsyKeyGenerator](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#cryptoframeworkcreateasykeygenerator)、[AsyKeyGenerator.generateKeyPair](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#generatekeypair-1)，生成RSA密钥类型为RSA1024、素数个数为2的非对称密钥对（KeyPair）。KeyPair对象中包括公钥PubKey、私钥PriKey。
13
14   如何生成RSA非对称密钥对，开发者可参考下文示例，并结合[非对称密钥生成和转换规格：RSA](crypto-asym-key-generation-conversion-spec.md#rsa)和[随机生成非对称密钥对](crypto-generate-asym-key-pair-randomly.md)理解，参考文档与当前示例可能存在入参差异，请在阅读时注意区分。
15
162. 传入参数[KeyEncodingConfig](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#keyencodingconfig18)，参数PKCS1/PKCS8，调用[prikey.getEncodedPem](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#getencodedpem18)生成编码后的私钥字符串。
17
18**解码**
19
201. 调用[cryptoFramework.createAsyKeyGenerator](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#cryptoframeworkcreateasykeygenerator)生成RSA非对称密钥生成器asyKeyGenerator。
21
22   如何生成RSA非对称密钥对，开发者可参考下文示例，并结合[非对称密钥生成和转换规格：RSA](crypto-asym-key-generation-conversion-spec.md#rsa)。
23
24   > **注意：**
25   > 解码应该与编码传入的算法一致。
26
272. 调用异步[asyKeyGenerator.convertPemKey](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#convertpemkey18)或者同步方法[asyKeyGenerator.convertPemKeySync](../../reference/apis-crypto-architecture-kit/js-apis-cryptoFramework.md#convertpemkeysync18)，传入编码后的私钥字符串与编码口令。最后返回编码前的私钥字符串。
28
29- 编码示例：
30  ```ts
31  import { cryptoFramework } from '@kit.CryptoArchitectureKit';
32
33  function TestPriKeyPkcs1Encoded() {
34    let rsaGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');
35    let keyPair = rsaGenerator.generateKeyPairSync();
36    let options : cryptoFramework.KeyEncodingConfig = {
37        password: "123456",
38        cipherName: "AES-128-CBC"
39    }
40    let priPemKey = keyPair.priKey;
41    let priString = priPemKey.getEncodedPem('PKCS1', options);
42    console.info("[sync]TestPriKeyPkcs1Encoded priString output is " + priString);
43  }
44
45  ```
46
47- 解码示例：
48  ```ts
49  import { cryptoFramework } from '@kit.CryptoArchitectureKit';
50  import { BusinessError } from '@kit.BasicServicesKit';
51
52  let priKeyPkcs1EncodingStr : string =
53  "-----BEGIN RSA PRIVATE KEY-----\n"
54    +"Proc-Type: 4,ENCRYPTED\n"
55    +"DEK-Info: AES-128-CBC,815A066131BF05CF87CE610A59CC69AE\n\n"
56    +"7Jd0vmOmYGFZ2yRY8fqRl3+6rQlFtNcMILvcb5KWHDSrxA0ULmJE7CW0DSRikHoA\n"
57    +"t0KgafhYXeQXh0dRy9lvVRAFSLHCLJVjchx90V7ZSivBFEq7+iTozVp4AlbgYsJP\n"
58    +"vx/1sfZD2WAcyMJ7IDmJyft7xnpVSXsyWGTT4f3eaHJIh1dqjwrso7ucAW0FK6rp\n"
59    +"/TONyOoXNfXtRbVtxNyCWBxt4HCSclDZFvS9y8fz9ZwmCUV7jei/YdzyQI2wnE13\n"
60    +"W8cKlpzRFL6BWi8XPrUtAw5MWeHBAPUgPWMfcmiaeyi5BJFhQCrHLi+Gj4EEJvp7\n"
61    +"mP5cbnQAx6+paV5z9m71SKrI/WSc4ixsYYdVmlL/qwAK9YliFfoPl030YJWW6rFf\n"
62    +"T7J9BUlHGUJ0RB2lURNNLakM+UZRkeE9TByzCzgTxuQtyv5Lwsh2mAk3ia5x0kUO\n"
63    +"LHg3Eoabhdh+YZA5hHaxnpF7VjspB78E0F9Btq+A41rSJ6zDOdToHey4MJ2nxdey\n"
64    +"Z3bi81TZ6Fp4IuROrvZ2B/Xl3uNKR7n+AHRKnaAO87ywzyltvjwSh2y3xhJueiRs\n"
65    +"BiYkyL3/fnocD3pexTdN6h3JgQGgO5GV8zw/NrxA85mw8o9im0HreuFObmNj36T9\n"
66    +"k5N+R/QIXW83cIQOLaWK1ThYcluytf0tDRiMoKqULiaA6HvDMigExLxuhCtnoF8I\n"
67    +"iOLN1cPdEVQjzwDHLqXP2DbWW1z9iRepLZlEm1hLRLEmOrTGKezYupVv306SSa6J\n"
68    +"OA55lAeXMbyjFaYCr54HWrpt4NwNBX1efMUURc+1LcHpzFrBTTLbfjIyq6as49pH\n"
69    +"-----END RSA PRIVATE KEY-----\n"
70
71  async function TestConvertPemKeyByPromise() {
72    let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');
73    asyKeyGenerator.convertPemKey(null, priKeyPkcs1EncodingStr, "123456")
74      .then(keyPair => {
75        let priKey = keyPair.priKey;
76        if (priKey) {
77          console.info('convertPemKey success.');
78        }
79      }).catch((error: BusinessError) => {
80      console.error("convertPemKey error, error message is " + error.message);
81    });
82  }
83
84  ```