通过 crypto-js 解密 AES 256 CBC

Question

我有以下密钥和 IV 可以将 07KxrSbGIoPCIYh0I16maw== 解密为“496271”，我尝试搜索类似的问题，但我对加密知识的缺乏阻止了我从我自己解决这个问题。

get decryptedCode() {
  var key = CryptoJS.enc.Utf8.parse(
    "814591256d331af80bec0fa2bef1123e37e9f181f363af374787e24160275bce"
  )
  var iv = CryptoJS.enc.Utf8.parse("825b1f7c5f5edd614e8a0a0fef3c9ecf")
  var ciphertext = CryptoJS.enc.Base64.parse("07KxrSbGIoPCIYh0I16maw==")
  var encryptedCP = CryptoJS.lib.CipherParams.create({
    ciphertext: ciphertext,
    formatter: CryptoJS.format.OpenSSL 
  })
  var decryptedWA = CryptoJS.AES.decrypt(encryptedCP, key, { iv: iv })
  var decryptedUtf8 = decryptedWA.toString(CryptoJS.enc.Utf8)

  console.log(decryptedUtf8) // this should be 496271 but I keep getting blank string

  return decryptedUtf8
  }

Answer 1

您的密钥和 IV 是 hex-encoded，因此要解析它们您需要使用 CryptoJS.enc.Hex.parse() 而不是 CryptoJS.enc.Utf8.parse():

function getDecryptedCode() {
  var key = CryptoJS.enc.Hex.parse(
    "814591256d331af80bec0fa2bef1123e37e9f181f363af374787e24160275bce"
  );
  var iv = CryptoJS.enc.Hex.parse("825b1f7c5f5edd614e8a0a0fef3c9ecf");
  var ciphertext = CryptoJS.enc.Base64.parse("07KxrSbGIoPCIYh0I16maw==");
  var encryptedCP = CryptoJS.lib.CipherParams.create({
    ciphertext: ciphertext,
    formatter: CryptoJS.format.OpenSSL
  });
  var decryptedWA = CryptoJS.AES.decrypt(encryptedCP, key, {
    iv: iv
  });
  var decryptedUtf8 = decryptedWA.toString(CryptoJS.enc.Utf8);

  return decryptedUtf8;
}

console.log(getDecryptedCode()); // 496271

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通过 crypto-js 解密 AES 256 CBC

Decrypt AES 256 CBC by crypto-js

javascript

encryption

cryptojs