JAVA-PHP-Python通用AES加密

package demo;

import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Random;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

public class AesEncrypt {
	static Charset CHARSET = Charset.forName("utf-8");
	Base64 base64 = new Base64();
	byte[] aesKey;

	public AesEncrypt(String encodingAesKey) throws Exception {
		if (encodingAesKey.length() != 43) {
			System.out.println("加密 key 错误!");
			throw new Exception();
		} else {
			aesKey = Base64.decodeBase64(encodingAesKey + "=");
		}
	}

	// 随机生成16位字符串
	private String getRandomStr() {
		String base = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
		Random random = new Random();
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < 16; i++) {
			int number = random.nextInt(base.length());
			sb.append(base.charAt(number));
		}
		return sb.toString();
	}

	/**
	 * 对明文进行加密.
	 * 
	 * @param text
	 *            需要加密的明文
	 * @return 加密后base64编码的字符串
	 * @throws Exception
	 *             aes加密失败
	 */
	String encrypt(String text) throws Exception {
		ByteGroup byteCollector = new ByteGroup();
		byte[] textBytes = text.getBytes(CHARSET);

		byte[] randomStrBytes = this.getRandomStr().getBytes(CHARSET);

		byteCollector.addBytes(randomStrBytes);
		byteCollector.addBytes(textBytes);

		// ... + pad: 使用自定义的填充方式对明文进行补位填充
		byte[] padBytes = BlankFillEncoder.encode(byteCollector.size());

		byteCollector.addBytes(padBytes);

		// 获得最终的字节流, 未加密
		byte[] unencrypted = byteCollector.toBytes();

		try {
			// 设置加密模式为AES的CBC模式
			Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
			SecretKeySpec keySpec = new SecretKeySpec(aesKey, "AES");
			IvParameterSpec iv = new IvParameterSpec(aesKey, 0, 16);
			cipher.init(Cipher.ENCRYPT_MODE, keySpec, iv);

			// 加密
			byte[] encrypted = cipher.doFinal(unencrypted);

			// 使用BASE64对加密后的字符串进行编码
			String base64Encrypted = base64.encodeToString(encrypted);

			return base64Encrypted;
		} catch (Exception e) {
			e.printStackTrace();
			throw e;
		}
	}

	/**
	 * 对密文进行解密.
	 * 
	 * @param text
	 *            需要解密的密文
	 * @return 解密得到的明文
	 * @throws Exception
	 *             aes解密失败
	 */
	String decrypt(String text) throws Exception {
		byte[] original;
		try {
			// 设置解密模式为AES的CBC模式
			Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
			SecretKeySpec key_spec = new SecretKeySpec(aesKey, "AES");
			IvParameterSpec iv = new IvParameterSpec(Arrays.copyOfRange(aesKey,
					0, 16));
			cipher.init(Cipher.DECRYPT_MODE, key_spec, iv);

			// 使用BASE64对密文进行解码
			byte[] encrypted = Base64.decodeBase64(text);

			// 解密
			original = cipher.doFinal(encrypted);
		} catch (Exception e) {
			e.printStackTrace();
			throw e;
		}

		String content;
		try {
			// 去除补位字符
			byte[] bytes = BlankFillEncoder.decode(original);

			// 分离16位随机字符串,网络字节序和AppId
			byte[] result = Arrays.copyOfRange(bytes, 16, bytes.length);

			content = new String(result, CHARSET);
		} catch (Exception e) {
			e.printStackTrace();
			throw e;
		}

		return content;
	}

	public static void main(String[] args) throws Exception {
		// System.out.println("加密后");
		AesEncrypt tools = new AesEncrypt(
				"abcdefghijklmnopqrstuvwxyz0123456789ABCDEFG");
		String replyMsg = "testaesfunction";

		String enc = tools.encrypt(replyMsg);
		System.out.println(enc);

		String toDec = "uMWuzLg0A1mm7wKM3ipY9W72+EZg/s5OWJZHSgYMO7geCv8u2k/xYn+Qzkrr4U26";
		String dec = tools.decrypt(toDec);
		System.out.println(dec);
	}
}

package demo;

import java.util.ArrayList;

class ByteGroup {
	ArrayList<Byte> byteContainer = new ArrayList<Byte>();

	public byte[] toBytes() {
		byte[] bytes = new byte[byteContainer.size()];
		for (int i = 0; i < byteContainer.size(); i++) {
			bytes[i] = byteContainer.get(i);
		}
		return bytes;
	}

	public ByteGroup addBytes(byte[] bytes) {
		for (byte b : bytes) {
			byteContainer.add(b);
		}
		return this;
	}

	public int size() {
		return byteContainer.size();
	}
}

package demo;

import java.nio.charset.Charset;
import java.util.Arrays;

/**
 * 提供基于PKCS7算法的加解密接口.
 */
class BlankFillEncoder {
	static Charset CHARSET = Charset.forName("utf-8");
	static int BLOCK_SIZE = 32;

	/**
	 * 获得对明文进行补位填充的字节.
	 * 
	 * @param count 需要进行填充补位操作的明文字节个数
	 * @return 补齐用的字节数组
	 */
	static byte[] encode(int count) {
		// 计算需要填充的位数
		int amountToPad = BLOCK_SIZE - (count % BLOCK_SIZE);
		if (amountToPad == 0) {
			amountToPad = BLOCK_SIZE;
		}
		// 获得补位所用的字符
		char padChr = chr(amountToPad);
		String tmp = new String();
		for (int index = 0; index < amountToPad; index++) {
			tmp += padChr;
		}
		return tmp.getBytes(CHARSET);
	}

	/**
	 * 删除解密后明文的补位字符
	 * 
	 * @param decrypted 解密后的明文
	 * @return 删除补位字符后的明文
	 */
	static byte[] decode(byte[] decrypted) {
		int pad = (int) decrypted[decrypted.length - 1];
		if (pad < 1 || pad > 32) {
			pad = 0;
		}
		return Arrays.copyOfRange(decrypted, 0, decrypted.length - pad);
	}

	/**
	 * 将数字转化成ASCII码对应的字符，用于对明文进行补码
	 * 
	 * @param a 需要转化的数字
	 * @return 转化得到的字符
	 */
	static char chr(int a) {
		byte target = (byte) (a & 0xFF);
		return (char) target;
	}

}