【HarmonyOS NEXT】服务端下发RSA公钥字符串，前端需要对明文数据进行加密，如何对这个公钥进行转换_鸿蒙 rsa 加密

解答

传入公钥导入，然后加密，具体代码参考如下：

let base = new util.Base64Helper();
let pubKey = "HIHHBI*****qQSDFSDFSD";//公钥
let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator("RSA1024");
let cipher = cryptoFramework.createCipher("RSA1024|PKCS1"); //创建一个 Cipher (解密)对象
//引入外部的公钥加密
let publicKeyDataBlob:cryptoFramework.DataBlob = { data: base.decodeSync(pubKey) };
let keyGenPromise: cryptoFramework.KeyPair = await asyKeyGenerator.convertKey(publicKeyDataBlob, null);
await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyGenPromise.pubKey, null);
let put: cryptoFramework.DataBlob = { data: stringToUint8Array("加密内容sadad") };
const finalRes = await cipher.doFinal(put)let result = base.encodeToStringSync(finalRes.data);