我正在使用PHP加密数据,并且我在Android应用程序中解密数据(图像),但有时它会抛出一个IOException异常我真的不知道如何解决这个问题。当我加密PNG图像文件时,没关系,没有异常抛出,我的应用程序可以在列表视图中加载图像。但是当我加密一个jpg文件时,它是我抛出这个异常:用PHP加密,用Java解密:IOException:数据不是块大小对齐
08-04 06:36:54.734: WARN/System.err(254): java.io.IOException: data not block size aligned
08-04 06:36:54.734: WARN/System.err(254): at javax.crypto.CipherInputStream.read(CipherInputStream.java:97)
08-04 06:36:54.734: WARN/System.err(254): at javax.crypto.CipherInputStream.read(CipherInputStream.java:152)
08-04 06:36:54.734: WARN/System.err(254): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:183)
08-04 06:36:54.734: WARN/System.err(254): at java.io.BufferedInputStream.read(BufferedInputStream.java:346)
08-04 06:36:54.734: WARN/System.err(254): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
08-04 06:36:54.734: WARN/System.err(254): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:459)
08-04 06:36:54.734: WARN/System.err(254): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:515)
08-04 06:36:54.734: WARN/System.err(254): at com.custom.lazylist.ImageLoader.getBitmap(ImageLoader.java:105)
08-04 06:36:54.734: WARN/System.err(254): at com.custom.lazylist.ImageLoader.access$0(ImageLoader.java:75)
08-04 06:36:54.734: WARN/System.err(254): at com.custom.lazylist.ImageLoader$PhotosLoader.run(ImageLoader.java:228)
我读了它的问题可能是使用NoPadding在加密和解密code.Here是Java代码和PHP代码的互联网:
JAVA
try {
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
SecretKeySpec keySpec = new SecretKeySpec("abcde".getBytes(), "AES");
IvParameterSpec ivSpec = new IvParameterSpec("fedcba".getBytes());
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
AssetManager is = this.getAssets();
InputStream fis = is.open("card2_encrypted.jpg");
CipherInputStream cis = new CipherInputStream(fis, cipher);
FileOutputStream fos = new FileOutputStream(
new File(Environment.getExternalStorageDirectory(), "card2_decrypted.jpg"));
byte[] b = new byte[8];
int i;
while ((i = cis.read(b)) != -1) {
fos.write(b, 0, i);
}
fos.flush(); fos.close();
cis.close(); fis.close();
}
catch(Exception e){
e.fillInStackTrace();
Log.v("Error","Error "+e);
}
}
和PHP代码:
<?php
$secret_key = "abcde";
$iv = "fedcba";
$infile = "ss1.jpg";
$outfile = "ss1_encrypted.jpg";
$crypttext = file_get_contents($infile);
$plaintext = mcrypt_encrypt(MCRYPT_RIJNDAEL_128,
$secret_key, $crypttext, MCRYPT_MODE_CBC, $iv);
header('Content-Type: application/octet-stream');
header('Content-Length: ' . strlen($plaintext));
header('Content-Disposition: attachment; filename=' . ($outfile));
echo $plaintext;
?>
所以我quesion是如何解决的东西,在PHP和Java代码填充,这样我就可以载入我的图片我的app.Thanks很多的帮助!
请参阅http://stackoverflow.com/questions/4217920/java-des-in-php和http://tsrini.blogspot.com /2009/12/encrypt-in-java-and-decrypt-in-php.html这些可以帮助你 –