如何使用RSA公钥加密明文数据

import { buffer, util } from '@kit.ArkTS';
import { cryptoFramework } from '@kit.CryptoArchitectureKit';
/**

*/
export async function encryptRSA(message: string) {

let pubKeyStr = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDFQArGDm5BXM4jHHuZGIb/kUoqrSjXkjqPLgrDmqBFxNyYsyxvyFRO10nStQwdRkQkh5lZ5sqC1G/z6lyDPpEySTBo9S5GLZ2Tj4yinNjcMXmOwiHfyQAQo9LwdlyTedwRchg0fYewWBVTVhGcWPowT1aA+GnQhYwNmaS/iKQsNQIDAQAB";

let base64Helper = new util.Base64Helper();

let pubKeyBlob: cryptoFramework.DataBlob = { data: base64Helper.decodeSync(pubKeyStr) };

let rsaGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');

let keyPair = await rsaGenerator.convertKey(pubKeyBlob, null);

let cipher = cryptoFramework.createCipher('RSA1024|PKCS1');

await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyPair.pubKey, null);

let plainTextBlob: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(message, 'utf-8').buffer) };

let encryptBlob = await cipher.doFinal(plainTextBlob);

return base64Helper.encodeToStringSync(encryptBlob.data);
}