加解密问题的定位指导

密钥对在HarmonyOS侧导入失败。

HarmonyOS

put_get

2024-09-18 12:32:40

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回答 1

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zbw_apple

方案：不能直接拿到HarmonyOS侧使用，需要进行编码转换后使用。

根据密钥参数生成sm2私钥：

import { cryptoFramework } from '@kit.CryptoArchitectureKit' 
 
export async function convertStrToPriKey(keyStr: string): Promise<cryptoFramework.PriKey> { 
  let sk = BigInt("0x" + keyStr) 
  let priKeySpec: cryptoFramework.ECCPriKeySpec = { 
    params: cryptoFramework.ECCKeyUtil.genECCCommonParamsSpec('NID_sm2'), 
    sk: sk, 
    algName: "SM2", 
    specType: cryptoFramework.AsyKeySpecType.PRIVATE_KEY_SPEC 
  } 
  let keypairGenerator = cryptoFramework.createAsyKeyGeneratorBySpec(priKeySpec) 
  return await keypairGenerator.generatePriKey() 
}

根据密钥参数生成sm2公钥：

import { cryptoFramework } from '@kit.CryptoArchitectureKit' 
 
export async function convertStrToPubKey(keyStr: string): Promise<cryptoFramework.PubKey> { 
  let pubKeyStr = keyStr.startsWith("04") ? keyStr.slice(2) : keyStr 
  let pkPart1 = pubKeyStr.slice(0, pubKeyStr.length / 2) 
  let pkPart2 = pubKeyStr.slice(pubKeyStr.length / 2) 
  let pk: cryptoFramework.Point = { 
    x: BigInt("0x" + pkPart1), 
    y: BigInt("0x" + pkPart2), 
  } 
  let pubKeySpec: cryptoFramework.ECCPubKeySpec = { 
    params: cryptoFramework.ECCKeyUtil.genECCCommonParamsSpec('NID_sm2'), 
    pk: pk, 
    algName: "SM2", 
    specType: cryptoFramework.AsyKeySpecType.PUBLIC_KEY_SPEC 
  } 
  let keypairGenerator = cryptoFramework.createAsyKeyGeneratorBySpec(pubKeySpec) 
  return await keypairGenerator.generatePubKey() 
}