我试图使用codenameone BouncyCastle lib加密ISO-0 pinblock。 我使用达到此目的的方法如下:在codenameone BouncyCastle(无填充)中对齐数据块大小
private static byte[] performEncrypt(byte[] key, String plainText, boolean padding) {
byte[] ptBytes = plainText.getBytes();
BufferedBlockCipher cipher;
if (padding) {
cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
} else {
cipher = new BufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
}
cipher.init(true, new KeyParameter(key));
byte[] rv = new byte[cipher.getOutputSize(ptBytes.length)];
int oLen = cipher.processBytes(ptBytes, 0, ptBytes.length, rv, 0);
try {
cipher.doFinal(rv, oLen);
} catch (CryptoException ce) {
LoggingUtil.error(TAG, ce, "Unexpected Exception");
}
return rv;
}
private static String createIso0PinBlock(String pin, String number) {
...
}
private static String getPaddedData(String data, byte padCharacter) {
String paddedData = ByteUtil.pad(data, (char) padCharacter, 8).toString();
return paddedData;
}
public static String createPinBlockAndEncrypt(String pin, String number) {
LoggingUtil.debug("SecurityUtil", "CREAT PIN BLOCK AND ENCRYPT.. PIN: " + pin + " NUMBER: " + number);
String pb = createIso0PinBlock(pin, number.substring(0, number.length() - 1));
LoggingUtil.debug("SecurityUtil", "PINBLOCK: " + pb);
String padded = getPaddedData(pb, (byte) 0x00);
LoggingUtil.debug("SecurityUtil", "PADDED: " + padded);
byte[] encrypted = performEncrypt(Hex.decode(KEY.getBytes()), new String(ByteUtil.hex2byte(padded)), false);
return ByteUtil.byte2hex(encrypted);
}
在ByteUtil
:
public static StringBuilder pad(String data, char padCharacter, int multiplier) {
StringBuilder text = new StringBuilder();
text.append(data);
while (text.length() % multiplier != 0) {
text.append(padCharacter);
}
return text;
}
,得到实施例日志输出:
[SecurityUtil] CREAT PIN BLOCK AND ENCRYPT.. PIN: 2255 NUMBER: 6284734104205417486
[SecurityUtil] PINBLOCK: 042214FBDFABE8B7
[SecurityUtil] PADDED: 042214FBDFABE8B7
当我通过public static void main
方法运行该,但它的工作方式与预期的一样,但是,当我通过Codenameone为Android构建此应用程序时,logcat中出现以下错误:
org.bouncycastle.crypto.DataLengthException: data not block size aligned
org.bouncycastle.crypto.BufferedBlockCipher.doFinal(BufferedBlockCipher.java:275)
尽管填充的pinblock的长度是16(8的倍数)。
有关这个问题的任何帮助,将不胜感激。
很棒的回答。我们会避免在Codename One中使用字符串作为二进制数据,因为我们将字符串映射到本地字符串,例如在iOS上,它们在某些极端边缘情况下可能会有轻微的行为差异。例如。我们在整合zip支持https://www.codenameone.com/blog/zip-and-toast.html时遇到了问题 –