HarmonyOS SM2加密，HarmonyOS生成的密文要d2i_SM2_Ciphertext，请问可以发下d2i_SM2_Ciphertext的源码吗？

d2i_SM2_Ciphertext偶尔会报错SM2 ciphertext error!，不知道哪里的问题，希望提供d2i_SM2_Ciphertext方法的所有源码。

//发送短信
@State aesPhone: string = ""
@State aesImCode: string = ""
getMsgCode():void{
  const session = httpCore.getApiEngine();
  if (this.etImCode != '' && this.etImCode != undefined){
  //加密
  this.aesPhone = aesUtils.aesEncrypt(this.etPhone);
  this.aesImCode = aesUtils.aesEncrypt(this.etImCode);
  session.get(httpCore.getJointUrl() + apiService.getForgotPswCode + this.aesPhone + '/' + this.aesImCode + '/' + this.currentTimestamp)
  .then(async (response) => {
  let apiResult = new ApiResult();
  apiResult = JSON.parse(JSON.stringify(response))
  console.error('返回值===' + JSON.stringify(response));
  if (apiResult.status == '200') {
  this.getCodeInfo();
} else {
  promptAction.showToast({ message: apiResult.message, bottom: 100, duration: 1000 })
}
})
.catch((err: BusinessError) => {d2i_SM2_Ciphertext(standard_data: string): string {
  let message: string = standard_data;
  // 起始标识为03
  if (!message.startsWith(ASN1Util.SEQUENCE)) {
    this.ciphertextErr();
  }
  message = message.slice(ASN1Util.SEQUENCE.length, message.length);

  // SM2;
  let sequence_lenHex: string = this.getLenHex(message);
  message = message.slice(sequence_lenHex.length, message.length);
  let sequence_len: number = this.lenHex2number(sequence_lenHex);
  if (sequence_len != message.length / 2) {
    this.ciphertextErr();
  }
  let sm2_sequence = new SM2_SEQUENCE();
  message = this.readC1(sm2_sequence, message);
  message = this.readC3(sm2_sequence, message);
  message = this.readC2(sm2_sequence, message);
  let primal_data: string = sm2_sequence.C1x + sm2_sequence.C1y + sm2_sequence.C3 + sm2_sequence.C2;
  return primal_data;
}
  console.error("err:" + JSON.stringify(err));
});
}
}

以上方法已经有了，但是在readC1中会报错，求readC1 readC2 readC3源码。