使用RSA私钥进行编码解码(ArkTS)

编码

调用cryptoFramework.createAsyKeyGenerator、AsyKeyGenerator.generateKeyPair，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。

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和随机生成非对称密钥对理解，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。
传入参数KeyEncodingConfig，参数PKCS1/PKCS8，调用prikey.getEncodedPem生成编码后的私钥字符串。

解码

调用cryptoFramework.createAsyKeyGenerator生成RSA非对称密钥生成器asyKeyGenerator。

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。

解码应该与编码传入的算法一致。
调用异步asyKeyGenerator.convertPemKey或者同步方法asyKeyGenerator.convertPemKeySync，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。

编码示例：

import { cryptoFramework } from '@kit.CryptoArchitectureKit';

function prikeyEncoding() {
  let rsaGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');
  let keyPair = rsaGenerator.generateKeyPairSync();
  let options : cryptoFramework.KeyEncodingConfig = {
      password: '123456',
      cipherName: 'AES-128-CBC'
  }
  let priPemKey = keyPair.priKey;
  let priString = priPemKey.getEncodedPem('PKCS1', options);
  console.info('[sync]TestPriKeyPkcs1Encoded priString output: ' + priString);
}

解码示例：

import { cryptoFramework } from '@kit.CryptoArchitectureKit';
import { BusinessError } from '@kit.BasicServicesKit';

let priKeyPkcs1EncodingStr : string =
'-----BEGIN RSA PRIVATE KEY-----\n'+
  'Proc-Type: 4,ENCRYPTED\n'+
  'DEK-Info: AES-128-CBC,815A066131BF05CF87CE610A59CC69AE\n\n'+
  '7Jd0vmOmYGFZ2yRY8fqRl3+6rQlFtNcMILvcb5KWHDSrxA0ULmJE7CW0DSRikHoA\n'+
  't0KgafhYXeQXh0dRy9lvVRAFSLHCLJVjchx90V7ZSivBFEq7+iTozVp4AlbgYsJP\n'+
  'vx/1sfZD2WAcyMJ7IDmJyft7xnpVSXsyWGTT4f3eaHJIh1dqjwrso7ucAW0FK6rp\n'+
  '/TONyOoXNfXtRbVtxNyCWBxt4HCSclDZFvS9y8fz9ZwmCUV7jei/YdzyQI2wnE13\n'+
  'W8cKlpzRFL6BWi8XPrUtAw5MWeHBAPUgPWMfcmiaeyi5BJFhQCrHLi+Gj4EEJvp7\n'+
  'mP5cbnQAx6+paV5z9m71SKrI/WSc4ixsYYdVmlL/qwAK9YliFfoPl030YJWW6rFf\n'+
  'T7J9BUlHGUJ0RB2lURNNLakM+UZRkeE9TByzCzgTxuQtyv5Lwsh2mAk3ia5x0kUO\n'+
  'LHg3Eoabhdh+YZA5hHaxnpF7VjspB78E0F9Btq+A41rSJ6zDOdToHey4MJ2nxdey\n'+
  'Z3bi81TZ6Fp4IuROrvZ2B/Xl3uNKR7n+AHRKnaAO87ywzyltvjwSh2y3xhJueiRs\n'+
  'BiYkyL3/fnocD3pexTdN6h3JgQGgO5GV8zw/NrxA85mw8o9im0HreuFObmNj36T9\n'+
  'k5N+R/QIXW83cIQOLaWK1ThYcluytf0tDRiMoKqULiaA6HvDMigExLxuhCtnoF8I\n'+
  'iOLN1cPdEVQjzwDHLqXP2DbWW1z9iRepLZlEm1hLRLEmOrTGKezYupVv306SSa6J\n'+
  'OA55lAeXMbyjFaYCr54HWrpt4NwNBX1efMUURc+1LcHpzFrBTTLbfjIyq6as49pH\n'+
  '-----END RSA PRIVATE KEY-----';

async function prikeyDecoding() {
  let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');
  asyKeyGenerator.convertPemKey(null, priKeyPkcs1EncodingStr, '123456')
    .then(keyPair => {
      let priKey = keyPair.priKey;
      if (priKey) {
        console.info('convertPemKey result: success.');
      }
    }).catch((error: BusinessError) => {
    console.error(`convertPemKey failed: errCode: ${error.code}, message: ${error.message}`);
  });
}