Cryto无法解密字符串

Question

我正在尝试解密字符串，但测试仍然失败，我似乎无法弄清楚问题。 以下是涉及的文件：

Encryptor.js

import * as crypto from 'crypto'

const hashAlgorithm = 'sha256';
const encryptAlgorithm = 'aes192';
const textEncoding = 'hex';
const encryptionKey = "some secret key";

export const getHash = text => {
  try {
    const encryptedData = crypto.createHmac(hashAlgorithm, encryptionKey);
    encryptedData.setEncoding(textEncoding)
                .end(text, () => encryptedData.read())
    return encryptedData;        
  } catch (error) {
    console.error(error);
  }
}

export const encrypt = text => {
  if (!text)
    throw Error('Text may not be blank');
  try {
    const cipher = crypto.createCipher(encryptAlgorithm, encryptionKey);
    let cipherText = '';
    cipher.on('readable', () => {
      let data = cipher.read();
      if (data)
        cipherText += data.toString(textEncoding);
    });
    cipher.on('end', () => cipherText);
    cipher.write(text);
    cipher.end();
  }
  catch (error) {
    return console.error(error);
  }
}

export const decrypt = text => {
  if (!text)
    throw Error('Decrypt: Text may not be blank');
  try {
    const decipher = crypto.createDecipher(encryptAlgorithm, encryptionKey);
    let decrypted = '';

    decipher.on('readable', () => {
      const data = decipher.read();
      if (data)
        return decrypted += data.toString('utf8');
    });
    decipher.on('end', () => decrypted);
    decipher.write(text, textEncoding);
    decipher.end();
  }
  catch (error) {
    console.error(error);
  }
}

Encryptor.test.js

import {getHash, encrypt, decrypt } from './Encryptor.js';


const dataString = "Important information must always be encypted"

it('Should create a hashed message FROM STRING', () => {
  expect(getHash(dataString)).not.toEqual(dataString)
})

it('Should encrypt the message FROM STRING', () => {
  expect(encrypt(dataString)).not.toEqual(dataString)
})

it('Should decrypt the message FROM ENCRYPTED STRING', () => {
  expect(decrypt(encrypt(dataString))).toEqual(dataString)
})

据我了解，这段代码很好。但是，当我运行测试时，最后一个测试失败了：

如果我将文字字符串传递给解密函数，如下所示：

it('Should decrypt the message FROM ENCRYPTED STRING', () => {
  expect(decrypt("encypted")).toEqual(dataString)
})

返回的结果为undefined，我也收到error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length错误

我几乎完全遵循了示例here但没有成功。