Android平台下的AES加密和Java平台下的运行结果不同的解决办法
Android平台下的AES加密和Java平台下的运行结果不同的解决办法
实现Android和Java互相加解密
完美支持中文
跨平台这种实现
还是一个原则
不要对参数采用默认实现
否则难以互通
核心函数如下,Android和java均如此
- public static final String VIPARA = "0102030405060708";
- public static final String bm = "GBK";
- public static String encrypt(String dataPassword, String cleartext)
- throws Exception {
- IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());
- SecretKeySpec key = new SecretKeySpec(dataPassword.getBytes(), "AES");
- Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
- cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
- byte[] encryptedData = cipher.doFinal(cleartext.getBytes(bm));
- return Base64.encode(encryptedData);
- }
- public static String decrypt(String dataPassword, String encrypted)
- throws Exception {
- byte[] byteMi = Base64.decode(encrypted);
- IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());
- SecretKeySpec key = new SecretKeySpec(dataPassword.getBytes(), "AES");
- Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
- cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
- byte[] decryptedData = cipher.doFinal(byteMi);
- return new String(decryptedData,bm);
- }
Base64从网上找的工具类
- package com.bao;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.OutputStream;
- public class Base64 {
- private static final char[] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".toCharArray();
- /**
- * data[]进行编码
- * @param data
- * @return
- */
- public static String encode(byte[] data) {
- int start = 0;
- int len = data.length;
- StringBuffer buf = new StringBuffer(data.length * 3 / 2);
- int end = len - 3;
- int i = start;
- int n = 0;
- while (i <= end) {
- int d = ((((int) data[i]) & 0x0ff) << 16)
- | ((((int) data[i + 1]) & 0x0ff) << 8)
- | (((int) data[i + 2]) & 0x0ff);
- buf.append(legalChars[(d >> 18) & 63]);
- buf.append(legalChars[(d >> 12) & 63]);
- buf.append(legalChars[(d >> 6) & 63]);
- buf.append(legalChars[d & 63]);
- i += 3;
- if (n++ >= 14) {
- n = 0;
- buf.append(" ");
- }
- }
- if (i == start + len - 2) {
- int d = ((((int) data[i]) & 0x0ff) << 16)
- | ((((int) data[i + 1]) & 255) << 8);
- buf.append(legalChars[(d >> 18) & 63]);
- buf.append(legalChars[(d >> 12) & 63]);
- buf.append(legalChars[(d >> 6) & 63]);
- buf.append("=");
- } else if (i == start + len - 1) {
- int d = (((int) data[i]) & 0x0ff) << 16;
- buf.append(legalChars[(d >> 18) & 63]);
- buf.append(legalChars[(d >> 12) & 63]);
- buf.append("==");
- }
- return buf.toString();
- }
- private static int decode(char c) {
- if (c >= 'A' && c <= 'Z')
- return ((int) c) - 65;
- else if (c >= 'a' && c <= 'z')
- return ((int) c) - 97 + 26;
- else if (c >= '0' && c <= '9')
- return ((int) c) - 48 + 26 + 26;
- else
- switch (c) {
- case '+':
- return 62;
- case '/':
- return 63;
- case '=':
- return 0;
- default:
- throw new RuntimeException("unexpected code: " + c);
- }
- }
- /**
- * Decodes the given Base64 encoded String to a new byte array. The byte
- * array holding the decoded data is returned.
- */
- public static byte[] decode(String s) {
- ByteArrayOutputStream bos = new ByteArrayOutputStream();
- try {
- decode(s, bos);
- } catch (IOException e) {
- throw new RuntimeException();
- }
- byte[] decodedBytes = bos.toByteArray();
- try {
- bos.close();
- bos = null;
- } catch (IOException ex) {
- System.err.println("Error while decoding BASE64: " + ex.toString());
- }
- return decodedBytes;
- }
- private static void decode(String s, OutputStream os) throws IOException {
- int i = 0;
- int len = s.length();
- while (true) {
- while (i < len && s.charAt(i) <= ' ')
- i++;
- if (i == len)
- break;
- int tri = (decode(s.charAt(i)) << 18)
- + (decode(s.charAt(i + 1)) << 12)
- + (decode(s.charAt(i + 2)) << 6)
- + (decode(s.charAt(i + 3)));
- os.write((tri >> 16) & 255);
- if (s.charAt(i + 2) == '=')
- break;
- os.write((tri >> 8) & 255);
- if (s.charAt(i + 3) == '=')
- break;
- os.write(tri & 255);
- i += 4;
- }
- }
- }
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