获取3DES二进制密钥数据，封装成DataBlob对象。
调用cryptoFramework.createSymKeyGenerator，指定字符串参数'3DES192'，创建密钥算法为3DES、密钥长度为192位的对称密钥生成器（SymKeyGenerator）。
调用SymKeyGenerator.convertKey，根据指定的对称密钥二进制数据生成对称密钥对象（SymKey）。
调用SymKey.getEncoded，获取密钥对象的二进制数据。

以使用callback方式生成3DES密钥为例：

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

function genKeyMaterialBlob(): cryptoFramework.DataBlob {
  let arr = [
  0xba, 0x3d, 0xc2, 0x71, 0x21, 0x1e, 0x30, 0x56,
    0xad, 0x47, 0xfc, 0x5a, 0x46, 0x39, 0xee, 0x7c,
    0xba, 0x3b, 0xc2, 0x71, 0xab, 0xa0, 0x30, 0x72]; // 密钥长度为192位，即24字节。
  let keyMaterial = new Uint8Array(arr);
  return { data: keyMaterial };
}

function testConvertSymKey() {
  // 创建SymKeyGenerator实例
  let symKeyGenerator = cryptoFramework.createSymKeyGenerator('3DES192');
  // 根据指定的数据生成对称密钥
  let keyMaterialBlob = genKeyMaterialBlob();
  try {
    symKeyGenerator.convertKey(keyMaterialBlob, (error, key) => {
      if (error) { // 如果业务逻辑执行失败，则callback的第一个参数返回错误信息，即异步抛出异常
        let e: BusinessError = error as BusinessError;
        console.error(`convertKey failed: errCode: ${e.code}, message: ${e.message}`);
        return;
      }
      console.info('key algName: ' + key.algName);
      console.info('key format: ' + key.format);
      let encodedKey = key.getEncoded(); // 获取对称密钥的二进制数据，并以字节数组形式输出。长度为24字节
      console.info('key getEncoded hex: ' + encodedKey.data);
    })
  } catch (error) { // 参数检查发现错误立即抛出异常
    let e: BusinessError = error as BusinessError;
    console.error(`convertKey failed: errCode: ${e.code}, message: ${e.message}`);
  }
}

同步方法（调用方法convertKeySync）：

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

function genKeyMaterialBlob(): cryptoFramework.DataBlob {
  let arr = [
  0xba, 0x3d, 0xc2, 0x71, 0x21, 0x1e, 0x30, 0x56,
    0xad, 0x47, 0xfc, 0x5a, 0x46, 0x39, 0xee, 0x7c,
    0xba, 0x3b, 0xc2, 0x71, 0xab, 0xa0, 0x30, 0x72]; // 密钥长度为192位，即24字节。
  let keyMaterial = new Uint8Array(arr);
  return { data: keyMaterial };
}

function testConvertSymKey() {
  // 创建SymKeyGenerator实例
  let symKeyGenerator = cryptoFramework.createSymKeyGenerator('3DES192');
  // 根据指定的数据生成对称密钥
  let keyMaterialBlob = genKeyMaterialBlob();
  try {
    let key = symKeyGenerator.convertKeySync(keyMaterialBlob);
    console.info('key algName: ' + key.algName);
    console.info('key format: ' + key.format);
    let encodedKey = key.getEncoded(); // 获取对称密钥的二进制数据，长度为24字节。
    console.info('key getEncoded length: ' + encodedKey.data.length);
  } catch (error) { // 参数检查发现错误立即抛出异常
    let e: BusinessError = error as BusinessError;
    console.error(`convertKeySync failed: errCode: ${e.code}, message: ${e.message}`);
  }
}

指定二进制数据转换HMAC密钥

请查看对称密钥生成和转换规格：HMAC。

获取HMAC二进制密钥并封装成DataBlob对象。
调用cryptoFramework.createSymKeyGenerator，指定字符串参数'HMAC'，创建密钥算法为HMAC对称密钥生成器（SymKeyGenerator），其支持生成的密钥长度为[1, 4096]字节。
调用SymKeyGenerator.convertKey，根据指定的对称密钥二进制数据，生成对称密钥对象（SymKey）。
调用SymKey.getEncoded，获取密钥的二进制数据。

以生成HMAC密钥为例，使用await方式：

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

async function testConvertHmacKey() {
  try {
    // 对称密钥长度为64字节，512比特
    let keyMessage = '12345678abcdefgh12345678abcdefgh12345678abcdefgh12345678abcdefgh';
    let keyBlob: cryptoFramework.DataBlob = {
      data: new Uint8Array(buffer.from(keyMessage, 'utf-8').buffer)
    }
    let symKeyGenerator = cryptoFramework.createSymKeyGenerator('HMAC');
    let key = await symKeyGenerator.convertKey(keyBlob);
    let encodedKey = key.getEncoded();
    console.info('key encoded data: ' + encodedKey.data);
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error(`call failed: errCode: ${e.code}, errMsg: ${e.message}`);
  }
}

同步方法（调用方法convertKeySync）：

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

function testConvertKeySync() {
  try {
    // 对称密钥长度为64字节，512比特
    let keyMessage = '12345678abcdefgh12345678abcdefgh12345678abcdefgh12345678abcdefgh';
    let keyBlob: cryptoFramework.DataBlob = {
      data : new Uint8Array(buffer.from(keyMessage, 'utf-8').buffer)
    }
    let symKeyGenerator = cryptoFramework.createSymKeyGenerator('HMAC');
    let key = symKeyGenerator.convertKeySync(keyBlob);
    let encodedKey = key.getEncoded();
    console.info('key encoded data: ' + encodedKey.data);
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error(`call failed: errCode: ${e.code}, errMsg: ${e.message}`);
  }
}

目录

指定二进制数据转换对称密钥(ArkTS)

指定二进制数据转换3DES密钥

指定二进制数据转换HMAC密钥