由于项目的优化改进,用到AES+RSA加密传输数据。于是,在网上摘录了网友们的AES算法,如下:
public static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(clear);
return encrypted;
}
public static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
byte[] decrypted = cipher.doFinal(encrypted);
return decrypted;
}
public static byte[] getRawKey(byte[] seed) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
sr.setSeed(seed);
kgen.init(128, sr);
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
return raw;
}
一切正常的在Android 4.3-6.1的手机上加解密,但是我用 LGE Nexus 5X (7.1.1 API 25)上发现在Android N上 google去掉了Crypto provider,意味着我们将不能继续像上面那样对数据加密填充。当然,在studio里的Logcat里会提示前往关于Android N对Crypto的解决方案:
http://Android-developers.blogspot.com/2016/06/security-crypto-provider-deprecated-in.html
解决方案:
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", new CryptoProvider());
代替
SecureRandom sr = SecureRandom.getInstance("SHA1PRNG","Crypto");
[java] view plain copy