[Source | Javascript] AES256 암호화 / 복호화

crypto-js 를 활용한 암호화 / 복호화 코드를 정리한다.

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> 작성일 : 2023-04-06

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<1> 설치

https://www.npmjs.com/package/crypto-js

npm install crypto-js

 

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<2> Key / IV 정의의

const encKey = 'opendocsdocs20230626abcdefghij!@'; // 32Byte
const encIV = 'opendocsdocs2023'; // 16Byte

 

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<3> AES256 암호화 / 복호화 함수

const encAES = (str, key, iv) => {
  const cipher = Crypto.AES.encrypt(str, Crypto.enc.Utf8.parse(key), {
    iv: Crypto.enc.Utf8.parse(iv),
    padding: Crypto.pad.Pkcs7,
    mode: Crypto.mode.CBC
  });
  return cipher.toString();
};
const decAES = (str, key, iv) => {
  const cipher = Crypto.AES.decrypt(str, Crypto.enc.Utf8.parse(key), {
    iv: Crypto.enc.Utf8.parse(iv),
    padding: Crypto.pad.Pkcs7,
    mode: Crypto.mode.CBC
  });
  return cipher.toString(Crypto.enc.Utf8);
};

 

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<4> Base64 인코딩 / 디코딩 함수

const encBase64 = (str) => {
  const wordArray = Crypto.enc.Utf8.parse(str);
  return Crypto.enc.Base64.stringify(wordArray);
};
const decBase64 = (str) => {
  const parsedWordArray = Crypto.enc.Base64.parse(str);
  return parsedWordArray.toString(Crypto.enc.Utf8);
};

 

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<5> 암호화 / 복호화 샘플

// Enc
const encValue = encAES('7a4d1829-0683-465b-8c79-0de27739d887', encKey, encIV);
const encResult = encBase64(encValue);
console.log(`endode str : ${encResult}`);
// Dec
const devValue = decBase64(encResult);
const decResult = decAES(devValue, encKey, encIV);
console.log(`decode str : ${decResult}`);