Golang中的AES加密和Java中的解密

Java中解密AES加密文字

要解密Golang函數產生的AES加密文本，需要Java實作。下面的Java程式碼示範了解密過程：

public class AESDecryption {

    public static String decode(String base64Text, byte[] key) throws Exception {
        byte[] inputArr = Base64.getUrlDecoder().decode(base64Text);
        SecretKeySpec skSpec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance("AES/CFB/NoPadding");
        int blockSize = cipher.getBlockSize();
        IvParameterSpec iv = new IvParameterSpec(Arrays.copyOf(inputArr, blockSize));
        byte[] dataToDecrypt = Arrays.copyOfRange(inputArr, blockSize, inputArr.length);
        cipher.init(Cipher.DECRYPT_MODE, skSpec, iv);
        byte[] result = cipher.doFinal(dataToDecrypt);
        return new String(result, StandardCharsets.UTF_8);
    }

    public static void main(String[] args) {
        try {
            String encryptedText = "c1bpFhxn74yzHQs-vgLcW6E5yL8zJfgceEQgYl0=";
            byte[] key = "0123456789abcdef".getBytes();
            String decryptedText = decode(encryptedText, key);
            System.out.println("Decrypted text: "   decryptedText);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

這段Java程式碼應該成功解密Golang函數產生的加密文字並傳回原始明文。

Scala版本

Scala版本解密代碼如下：

object AESDecryption {

    def decode(input: String, key: String): String = {
        val cipher = Cipher.getInstance("AES/CFB/NoPadding")
        val blockSize = cipher.getBlockSize()
        val keyBytes = key.getBytes()
        val inputArr = Base64.getUrlDecoder().decode(input)
        val skSpec = new SecretKeySpec(keyBytes, "AES")
        val iv = new IvParameterSpec(inputArr.slice(0, blockSize).toArray)
        val dataToDecrypt = inputArr.slice(blockSize, inputArr.size)
        cipher.init(Cipher.DECRYPT_MODE, skSpec, iv)
        new String(cipher.doFinal(dataToDecrypt.toArray))
    }

    def main(args: Array[String]): Unit = {
        val encryptedText = "c1bpFhxn74yzHQs-vgLcW6E5yL8zJfgceEQgYl0="
        val key = "0123456789abcdef"
        val decryptedText = decode(encryptedText, key)
        println("Decrypted text: "   decryptedText)
    }
}

此 Scala 程式碼也會解密 AES 加密文字並列印明文。