HarmonyOS开发中生成非对称密钥报错 Error: convert key fail. 问题？

Question

HarmonyOS开发中生成非对称密钥报错 Error: convert key fail. 问题
下面这段生成公钥的代码publicData应该传什么？传错了之后从提示看不出来原因Error: convert key fail.

import { cryptoFramework } from '@kit.CryptoArchitectureKit'; 
import { buffer, util } from '@kit.ArkTS'; 
 
export class CECryptoUtil { 
  public static stringToUint8Array(content: string): Uint8Array { 
    let textEncoder = new util.TextEncoder(); 
    let buffer = new ArrayBuffer(10000); 
    let result = new Uint8Array(buffer); 
    result = textEncoder.encodeInto(content); 
    console.info("buffer is ", result) 
    return result 
  } 
 
  static async rsaEncrypt(publicKey: string, content: string) { 
    let publicData = CECryptoUtil.stringToUint8Array(publicKey) 
    // let keyPair = await CECryptoUtil.genKeyPublicByData(publicData); 
    let keyPair = await CECryptoUtil.genKeyPublicByData(new Uint8Array([48, 129, 159, 48, 13, 6, 9, 42, 134, 72, 134, 247, 13, 1, 1, 1, 5, 0, 3, 129, 141, 0, 48, 129, 137, 2, 129, 129, 0, 197, 64, 10, 198, 14, 110, 65, 92, 206, 35, 28, 123, 153, 24, 134, 255, 145, 74, 42, 173, 40, 215, 146, 58, 143, 46, 10, 195, 154, 160, 69, 196, 220, 152, 179, 44, 111, 200, 84, 78, 215, 73, 210, 181, 12, 29, 70, 68, 36, 135, 153, 89, 230, 202, 130, 212, 111, 243, 234, 92, 131, 62, 145, 50, 73, 48, 104, 245, 46, 70, 45, 157, xxx, 143, 140, 162, xxxx, 216xxx 220, 49, 121, 142, 194, 33, 223, 201, 0, 16, 163, 210, 240, 118, 92, 147, 121, 220, 17, 114, 24, 52, 125, 135, 176, 88, 21, 83, 86, 17, 156, 88, 250, 48, 79, 86, 128, 248, 105, 208, 133, 140, 13, 153, 164, 191, 136, 164, 44, 53, 2, 3, 1, 0, 1])); 
    console.info("keyPair.pubKey.format is ", keyPair.pubKey.format) 
    let cipher = cryptoFramework.createCipher('RSA1024|PKCS1'); 
    await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyPair.pubKey, null); 
    let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(content, 'utf-8').buffer) }; 
    let encryptData = await cipher.doFinal(plainText); 
    let base64 = new util.Base64Helper(); 
    let encodeString = base64.encodeToStringSync(encryptData.data) 
    return encodeString; 
  } 
 
  static async genKeyPublicByData(pubKeyData: Uint8Array) { 
    let pubKeyBlob: cryptoFramework.DataBlob = { data: pubKeyData }; 
    let rsaGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024'); 
    try { 
      let keyPair = await rsaGenerator.convertKey(pubKeyBlob, null); 
      return keyPair; 
    } 
    catch (err) { 
      console.info("convertKey ", err) 
    } 
    let keyPair = await rsaGenerator.convertKey(pubKeyBlob, null); 
    return keyPair 
  } 
}

Answer 1

公钥应满足ASN.1语法、X.509规范、DER编码格式，私钥应满足ASN.1语法、PKCS#8规范、DER编码格式。https://developer.huawei.com/consumer/cn/doc/harmonyos-refere...

async function rsa(){ 
  let Base64 = new util.Base64Helper() 
  let keyGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024') 
  let a = Base64.decodeSync("MIIBIjANBgkqhkiG9w0BAQEFAAOxxxxIBCgKCAQEApMnEp7TS/Fv+/TY5KfKie3g3yAd2pzHrwVSn2kDzzcMhUHYkpqlLX1DhO7sYXFaa/N+tKZPpFRYY7KaToRkxoOCU7Urd7gMYMZwvWoC6UIPyR+xxxrieGFDC966x3D+xxx+tOU4rT1CgDn6cWDdjcX6zeyt3VkENrgkCc4YoEx5ME8pC4HMcvG43O5PDXaO8vyjDfOBbwm/u/0ZgBZrawsArkJ8GZZWnwheMjuZCZwFk8WfrQgRzkbsqfPHQxiIwqmf16QN6uArvpk3Ka+nwU3ur/fDo6/iUxxxxxxxxxxxxxxxXpyvGJnwF/OUcaMaSbCmdOJFQIDAQAB") 
  let keyPair = await keyGenerator.convertKey({ data:a },null) 
  let cipher = cryptoFramework.createCipher('RSA|PKCS1') 
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyPair.pubKey, null) 
  let inputBlob: cryptoFramework.DataBlob = {data: stringToUint8Array("加密的信息")} 
  let blob = await cipher.doFinal(inputBlob) 
  return Base64.encodeToString(blob.data) 
} 
export function stringToUint8Array(str: string) { 
  return new Uint8Array(buffer.from(str,'utf-8').buffer); 
}

Answer 2

如果出现生成非对称密钥报错 Error: convert key fail.，可能是传入的 publicData 参数不正确。对于 SM2 密钥转换失败，可能是因为公钥应满足 ASN.1 语法、X.509 规范、DER 编码格式，私钥应满足 ASN.1 语法、PKCS#8 规范、DER 编码格式。当前系统版本的指定生成密钥的 API 为 convertKey，其中 SM2 密钥生成的参数只支持封装并 ASN.1 序列化后的数据（公钥 91 字节，私钥 51 字节）。
参考资料: https://developer.huawei.com/consumer/cn/doc/harmonyos-guides...。