applet加密板块问题
在myeclipse内调试时不会报错,但是把applet放到页面上,就会报这个错!
applet加密代码:
try {
Cipher cipher = Cipher.getInstance("RSA",new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, pk);
this.showDialog(nameStr);
int blockSize = cipher.getBlockSize();// 获得加密块大小,如:加密前数据为128个byte,而key_size=1024
// 加密块大小为127
// byte,加密后为128个byte;因此共有2个加密块,第一个127
// byte第二个为1个byte
int outputSize = cipher.getOutputSize(data.length);// 获得加密块加密后块大小
int leavedSize = data.length % blockSize;
int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
: data.length / blockSize;
byte[] raw = new byte[outputSize * blocksSize];
this.showDialog(String.valueOf(outputSize)+"|"+String.valueOf(leavedSize));
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize)
cipher.doFinal(data, i * blockSize, blockSize, raw, i
* outputSize);
else
cipher.doFinal(data, i * blockSize, data.length - i
* blockSize, raw, i * outputSize);
// 这里面doUpdate方法不可用,查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到
// ByteArrayOutputStream中,而最后doFinal的时候才将所有的byte[]进行加密,可是到了此时加密块大小很可能已经超出了
// OutputSize所以只好用dofinal方法。
i++;
}
rsaName=raw;
this.showDialog(rsaName.toString());
} catch (Exception e7) {
e7.printStackTrace();
}
页面上报错
java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
为什么这样啊???????
急急!!!!!!!
在myeclipse内调试时不会报错,但是把applet放到页面上,就会报这个错!
applet加密代码:
try {
Cipher cipher = Cipher.getInstance("RSA",new org.bouncycastle.jce.provider.BouncyCastleProvider());
cipher.init(Cipher.ENCRYPT_MODE, pk);
this.showDialog(nameStr);
int blockSize = cipher.getBlockSize();// 获得加密块大小,如:加密前数据为128个byte,而key_size=1024
// 加密块大小为127
// byte,加密后为128个byte;因此共有2个加密块,第一个127
// byte第二个为1个byte
int outputSize = cipher.getOutputSize(data.length);// 获得加密块加密后块大小
int leavedSize = data.length % blockSize;
int blocksSize = leavedSize != 0 ? data.length / blockSize + 1
: data.length / blockSize;
byte[] raw = new byte[outputSize * blocksSize];
this.showDialog(String.valueOf(outputSize)+"|"+String.valueOf(leavedSize));
int i = 0;
while (data.length - i * blockSize > 0) {
if (data.length - i * blockSize > blockSize)
cipher.doFinal(data, i * blockSize, blockSize, raw, i
* outputSize);
else
cipher.doFinal(data, i * blockSize, data.length - i
* blockSize, raw, i * outputSize);
// 这里面doUpdate方法不可用,查看源代码后发现每次doUpdate后并没有什么实际动作除了把byte[]放到
// ByteArrayOutputStream中,而最后doFinal的时候才将所有的byte[]进行加密,可是到了此时加密块大小很可能已经超出了
// OutputSize所以只好用dofinal方法。
i++;
}
rsaName=raw;
this.showDialog(rsaName.toString());
} catch (Exception e7) {
e7.printStackTrace();
}
页面上报错
java.lang.NoClassDefFoundError: org/bouncycastle/jce/provider/BouncyCastleProvider
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
为什么这样啊???????
急急!!!!!!!
是不是没有导包啊
唉,算了!!!
Cipher cipher = Cipher.getInstance("RSA")
这么来吧!!!