在Android上如何使用AES加密和解密图像和其他文件有一个很好的例子吗？

解决方法:

警告：此答案包含您不应使用的代码,因为它不安全(使用SHA1PRNG进行密钥派生并在ECB模式下使用AES)

相反,在CBC或GCM模式下使用PBKDF2WithHmacSHA1进行密钥派生和AES(GCM提供隐私和完整性)

您可以使用以下函数：

private 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;

}

private 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;

}

并像这样调用它们：

ByteArrayOutputStream baos = new ByteArrayOutputStream();

bm.compress(Bitmap.CompressFormat.PNG, 100, baos); // bm is the bitmap object

byte[] b = baos.toByteArray();

byte[] keyStart = "this is a key".getBytes();

KeyGenerator kgen = KeyGenerator.getInstance("AES");

SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

sr.setSeed(keyStart);

kgen.init(128, sr); // 192 and 256 bits may not be available

SecretKey skey = kgen.generateKey();

byte[] key = skey.getEncoded();

// encrypt

byte[] encryptedData = encrypt(key,b);

// decrypt

byte[] decryptedData = decrypt(key,encryptedData);

这应该工作,我现在在项目中使用类似的代码.

标签：android,java,encryption,aes

来源： https://codeday.me/bug/20190915/1805385.html