HarmonyOS SM2密钥对转换失败

// 生成 公钥/私钥/密钥对 的 params 属性方法 
genSM2CommonSpec(): cryptoFramework.ECCCommonParamsSpec { 
  let fieldFp: cryptoFramework.ECFieldFp = { 
    fieldType: "Fp", 
    p: BigInt("0xFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF") 
  } 
 
  let G: cryptoFramework.Point = { 
    x: BigInt("0x32C4AE2C1F19811xxxxC9948FE30BBFF2660BE1715A4589334C74C7"), 
    y: BigInt("0xBC3736A2F4F6779Cxxxx692153D0A9877CC62A474002DF32E52139F0A0") 
  } 
 
  let SM2CommonSpec: cryptoFramework.ECCCommonParamsSpec = { 
    algName: "ECC", 
    specType: cryptoFramework.AsyKeySpecType.COMMON_PARAMS_SPEC, 
    field: fieldFp, 
    a: BigInt("0xFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC"), 
    b: BigInt("0x28E9FA9E9D9F5E3xxxx9789F515AB8F92DDBCBD414D940E93"), 
    g: G, 
    n: BigInt("0xFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B2xx53BBF40939D54123"), 
    h: 1 
  } 
 
  return SM2CommonSpec; 
} 
 
// 异步获取密钥对象 
async getPriKek(): Promise<cryptoFramework.PriKey | null> { 
  // 密钥字符串：6d562d653d74f41bff9c3f2359xxxxxxxxx416a931c44783b9afdf5c3327121c2266 
  let sk: bigint = BigInt("0x6d562d653d74f4xxxxxc3f2359e5add416a931c44783b9afdf5c3327121c2266"); 
 
  // 私钥对象数据 
  let priKey: cryptoFramework.ECCPriKeySpec = { 
    params: this.genSM2CommonSpec(), // 通用参数 
    sk: sk, // 密钥 
    algName: "ECC", // 指定算法 
    specType: cryptoFramework.AsyKeySpecType.PRIVATE_KEY_SPEC // 指定算法参数类型 
  } 
 
  let KeyPair: cryptoFramework.PriKey | null = null; 
  try { 
  let KeyPairGenerator: cryptoFramework.AsyKeyGeneratorBySpec; 
  KeyPairGenerator = cryptoFramework.createAsyKeyGeneratorBySpec(priKey); 
  KeyPair = await KeyPairGenerator.generatePriKey() 
    .then((keyPair) => { 
      return keyPair; // 私钥获取成功 
    }) 
    .catch((e: Error): null => { 
      console.log(JSON.stringify(e)) 
      AlertDialog.show({message:"PriKey get failed"}); 
      return null; 
    }) 
} catch (err) { 
  let e: BusinessError = err as BusinessError; 
  console.error(`sync error, ${e.code}, ${e.message}`); 
  AlertDialog.show({message:"PriKey get failed"}); 
  return null; 
} 
return KeyPair; 
}