HarmonyOS鸿蒙Next中能通过模数和指数,生成RSA的公钥key,有类似的功能吗?

HarmonyOS鸿蒙Next中能通过模数和指数,生成RSA的公钥key,有类似的功能吗?

这是安卓相关的代码

private fun getPublicKeyByModulusAndExponent(modulus: String, exponent: String): PublicKey? {
    val bigIntModules = BigInteger(modulus, 16)
    val bigIntPrivateExponent = BigInteger(exponent, 16)
    val keySpec = RSAPublicKeySpec(bigIntModules, bigIntPrivateExponent)
    val keyFactory = KeyFactory.getInstance("RSA")
    return keyFactory.generatePublic(keySpec)
}

更多关于HarmonyOS鸿蒙Next中能通过模数和指数,生成RSA的公钥key,有类似的功能吗?的实战教程也可以访问 https://www.itying.com/category-93-b0.html

6 回复

【背景知识】

密钥生成和转换包括:

其中RSA非对称密钥转换当前支持:

【解决方案】

通过模数和指数生成RSA的公钥,可以使用密钥参数生成RSA密钥,包括三个整数:

  • n:模数(Modulus),是私钥和公钥的公共参数。
  • sk:私钥指数(privateExponent),公式中常写作d。
  • pk:公钥指数(publicExponent),公式中常写作e。

详细的生成指导可参考指定密钥参数生成RSA公钥

【总结】

开发者可参考指定密钥参数生成RSA公钥通过模数和指数生成RSA的公钥。

更多关于HarmonyOS鸿蒙Next中能通过模数和指数,生成RSA的公钥key,有类似的功能吗?的实战系列教程也可以访问 https://www.itying.com/category-93-b0.html


请参考Crypto Architecture Kit简介-Crypto Architecture Kit(加解密算法框架服务)-安全-系统 - 华为HarmonyOS开发者 提供了相应的api

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在HarmonyOS中,可以使用cryptoFramework模块的AsyKeyGenerator类生成RSA密钥对。通过指定模数(modulus)和公共指数(publicExponent)参数,调用generateKeyPair方法即可生成RSA公钥。示例代码:

import cryptoFramework from '@ohos.security.cryptoFramework';

let rsaParams = {
  algName: "RSA",
  specType: cryptoFramework.AsyKeySpecType.RSA_KEYSPEC_CRT,
  params: {
    n: modulus, // 模数
    publicExponent: publicExponent // 公共指数
  }
};

let keyGen = cryptoFramework.createAsyKeyGenerator(rsaParams);
keyGen.generateKeyPair().then(keyPair => {
  let pubKey = keyPair.pubKey;
});

在HarmonyOS Next中可以通过security.key模块实现类似功能。以下是使用模数和指数生成RSA公钥的示例代码:

import { key } from '@kit.CryptoArchitectureKit';

function getPublicKeyByModulusAndExponent(modulus: string, exponent: string): key.PubKey | null {
  try {
    const bigIntModules = new bigInt(modulus, 16);
    const bigIntExponent = new bigInt(exponent, 16);
    
    const rsaParams: key.RSACommonParams = {
      n: bigIntModules.toByteArray(),
      e: bigIntExponent.toByteArray()
    };
    
    const keySpec: key.KeySpec = {
      algName: 'RSA',
      specType: key.SpecType.RSA,
      params: rsaParams
    };
    
    return key.createPubKey(keySpec);
  } catch (e) {
    console.error('Generate public key failed:', e);
    return null;
  }
}

关键点说明:

  1. 使用@kit.CryptoArchitectureKit中的key模块
  2. 通过key.RSACommonParams指定模数(n)和指数(e)
  3. 使用key.createPubKey()方法生成公钥

注意:需要确保输入的模数和指数是有效的16进制字符串。

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