解密使用哈希密钥加密的消息

Question

I have a problem where I need to decrypt a message which was encrypted using AES=256. I am already provided with a key and vector. I have to hash the provided key using SHA-256 and then use this hash to encrypt a message. The decryption code runs fine but the result is not the original String . Result: ?m?>? ???????z?p???>??<3? ?m?>? ???????z?p???>??<3? (the exact text is different, but after copying and pasting it, it is different).

My code below:

try {
    MessageDigest digest = MessageDigest.getInstance("SHA-256");
    byte[] hashBytes = digest.digest("someKey".getBytes(ENCODING_UTF8)); 
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    IvParameterSpec iv = new IvParameterSpec("somevector".getBytes(ENCODING_UTF8));
    SecretKeySpec skeySpec = new SecretKeySpec(hashBytes, AES);
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
    byte[] cipherText = cipher.doFinal(plainText.getBytes(ENCODING_UTF8));          
    encrypted = EACECryptoUtils.base64Encode(cipherText);
    Cipher decryptCipher = Cipher.getInstance(TRANSFORMATION_TYPE);
    IvParameterSpec decryptIV = new IvParameterSpec("somevector".getBytes(ENCODING_UTF8));
    SecretKeySpec decryptSkeySpec = new SecretKeySpec(hashBytes, AES);
    decryptCipher.init(Cipher.DECRYPT_MODE, decryptSkeySpec, decryptIV);
    byte[] original = cipher.doFinal(EACECryptoUtils.base64Decode(encrypted));
    decrypted = new String(original);
    } catch (Exception e) {
            log.error(new LogRecord(FUNCTION_NAME + "Exception while encrypting the data", e));
            throw e;
        }
    }

Answer 1

byte[] original = cipher.doFinal(EACECryptoUtils.

I believe you should use decryptCipher instead of cipher