RSA支持私钥的编码解码

编码

1. 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。

2. 传入参数KeyEncodingConfig，参数PKCS1/PCKS8，调用prikey.getEncodedPem生成编码后的私钥字符串。

解码

1. 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。

   注意： 解码应该与编码传入的算法一致。

2. 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 TestPriKeyPkcs1Encoded() {
    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 is " + 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-----\n"
  
  async function TestConvertPemKeyByPromise() {
    let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');
    asyKeyGenerator.convertPemKey(null, priKeyPkcs1EncodingStr, "123456")
      .then(keyPair => {
        console.info('convertPemKey success.');
      }).catch((error: BusinessError) => {
      console.error("convertPemKey error.");
    });
  }