RSA加密方法在HarmonyOS 的实现

这里有个RSA加密算法的demo，您可以参考一下

import huks from '@ohos.security.huks';
import { BusinessError } from '@ohos.base';
let aesKeyAlias = 'test_rsaKeyAlias';
let handle:number;
let plainText = '123456';
let IV = '001122334455';
let cipherData:Uint8Array;

function StringToUint8Array(str: String) {
  let arr:number[]=new Array();
  for (let i = 0, j = str.length; i < j; ++i) {
    arr.push(str.charCodeAt(i));
  }
  return new Uint8Array(arr);
}
function Uint8ArrayToString(fileData:Uint8Array) {
  let dataString = '';
  for (let i = 0; i < fileData.length; i++) {
    dataString += String.fromCharCode(fileData[i]);
  }
  return dataString;
}
function GetRsaGenerateProperties() {
  let properties: Array<huks.HuksParam> = new Array();
  let index = 0;
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_ALGORITHM,
    value: huks.HuksKeyAlg.HUKS_ALG_RSA
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_KEY_SIZE,
    value: huks.HuksKeySize.HUKS_RSA_KEY_SIZE_2048
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_DIGEST,
    value: huks.HuksKeyDigest.HUKS_DIGEST_SHA256
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_PURPOSE,
    value: huks.HuksKeyPurpose.HUKS_KEY_PURPOSE_ENCRYPT |
    huks.HuksKeyPurpose.HUKS_KEY_PURPOSE_DECRYPT
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_PADDING,
    value: huks.HuksKeyPadding.HUKS_PADDING_PKCS1_V1_5
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_BLOCK_MODE,
    value: huks.HuksCipherMode.HUKS_MODE_ECB
  };
  return properties;
}
function GetRsaEncryptProperties() {
  let properties: Array<huks.HuksParam> = new Array();
  let index = 0;
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_ALGORITHM,
    value: huks.HuksKeyAlg.HUKS_ALG_RSA
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_KEY_SIZE,
    value: huks.HuksKeySize.HUKS_RSA_KEY_SIZE_2048
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_DIGEST,
    value: huks.HuksKeyDigest.HUKS_DIGEST_SHA256
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_PURPOSE,
    value: huks.HuksKeyPurpose.HUKS_KEY_PURPOSE_ENCRYPT
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_PADDING,
    value: huks.HuksKeyPadding.HUKS_PADDING_PKCS1_V1_5
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_BLOCK_MODE,
    value: huks.HuksCipherMode.HUKS_MODE_ECB
  };
  // properties[index++] = {
  // tag: huks.HuksTag.HUKS_TAG_IV,
  // value: StringToUint8Array(IV)
  // }
  return properties;
}
function GetRsaDecryptProperties() {
  let properties: Array<huks.HuksParam> = new Array();
  let index = 0;
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_ALGORITHM,
    value: huks.HuksKeyAlg.HUKS_ALG_RSA
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_KEY_SIZE,
    value: huks.HuksKeySize.HUKS_RSA_KEY_SIZE_2048
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_DIGEST,
    value: huks.HuksKeyDigest.HUKS_DIGEST_SHA256
  };
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_PURPOSE,
    value: huks.HuksKeyPurpose.HUKS_KEY_PURPOSE_DECRYPT
  }
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_PADDING,
    value: huks.HuksKeyPadding.HUKS_PADDING_PKCS1_V1_5
  }
  properties[index++] = {
    tag: huks.HuksTag.HUKS_TAG_BLOCK_MODE,
    value: huks.HuksCipherMode.HUKS_MODE_ECB
  }
  // properties[index++] = {
  // tag: huks.HuksTag.HUKS_TAG_IV,
  // value: StringToUint8Array(IV)
  // }
  return properties;
}
export async function GenerateRsaKey() {
  /*
  * 模拟生成密钥场景
  * 1. 确定密钥别名
  */
  /*
  * 2. 获取生成密钥算法参数配置
  */
  let genProperties = GetRsaGenerateProperties();
  let options: huks.HuksOptions = {
    properties: genProperties
  }
  /*
  * 3. 调用generateKeyItem
  */
  await huks.generateKeyItem(aesKeyAlias, options)
    .then((data) => {
      console.info(`promise: generate RSA Key success, data = ${JSON.stringify(data)}`);
    }).catch((error: BusinessError)=>{
      console.error(`promise: generate RSA Key failed` + error);
    })
}
export async function EncryptData() {
  /*
  * 模拟加密场景
  * 1. 获取密钥别名
  */
  /*
  * 2. 获取待加密的数据
  */
  /*
  * 3. 获取加密算法参数配置
  */
  let encryptProperties = GetRsaEncryptProperties();
  let options: huks.HuksOptions = {
    properties: encryptProperties,
    inData: StringToUint8Array(plainText)
  }
  /*
  * 4. 调用initSession获取handle
  */
  await huks.initSession(aesKeyAlias, options)
    .then((data) => {
      handle = data.handle;
    }).catch((error: BusinessError)=>{
      console.error(`promise: init EncryptData failed` + error);
    })
  /*
  * 5. 调用finishSession获取加密后的密文
  */
  await huks.finishSession(handle, options)
    .then((data) => {
      console.info(`promise: encrypt data success, data is `+ Uint8ArrayToString(data.outData as Uint8Array));
      cipherData = data.outData as Uint8Array;
    }).catch((error: BusinessError)=>{
      console.error(`promise: encrypt data failed` + error);
    })
}
export async function DecryptData() {
  /*
  * 模拟解密场景
  * 1. 获取密钥别名
  */
  /*
  * 2. 获取待解密的密文
  */
  /*
  * 3. 获取解密算法参数配置
  */
  let decryptOptions = GetRsaDecryptProperties()
  let options: huks.HuksOptions = {
    properties: decryptOptions,
    inData: cipherData
  }
  /*
  * 4. 调用initSession获取handle
  */
  await huks.initSession(aesKeyAlias, options)
    .then((data) => {
      handle = data.handle;
    }).catch((error: BusinessError)=>{
      console.error(`promise: init DecryptData failed` + error);
    })
  /*
  * 5. 调用finishSession获取解密后的数据
  */
  await huks.finishSession(handle, options)
    .then((data) => {
      console.info(`promise: decrypt data success, data is ` + Uint8ArrayToString(data.outData as Uint8Array));
    }).catch((error: BusinessError)=>{
      console.error(`promise: decrypt data failed` + error);
    })
}
async function DeleteKey() {
  /*
  * 模拟删除密钥场景
  * 1. 获取密钥别名
  */
  let emptyOptions: huks.HuksOptions = {
    properties: []
  }
  /*
  * 2. 调用deleteKeyItem删除密钥
  */
  await huks.deleteKeyItem(aesKeyAlias, emptyOptions)
    .then((data) => {
      console.info(`promise: delete data success`);
    }).catch((error: BusinessError)=>{
      console.error(`promise: delete data failed` + error);
    })
}

export async function rsa_test() {
  await GenerateRsaKey()
  await EncryptData()
  await DecryptData()
}