Java 输出Rijndael执行中的异常
我在使用BouncyCastleAPI for Java实现Rijndael加密时遇到问题 当我执行Java 输出Rijndael执行中的异常,java,encryption,bouncycastle,rijndael,block-cipher,Java,Encryption,Bouncycastle,Rijndael,Block Cipher,我在使用BouncyCastleAPI for Java实现Rijndael加密时遇到问题 当我执行cipher.doFinal(inputTextBytes,intOutOff)时,我得到了outputLengtheexception: org.bouncycastle.crypto.outputLength异常:输出缓冲区太短 我不完全理解如何生成该整数来执行doFinal()方法 以下是我尝试过的: public class RijndaelAndRFC2899Implementation
cipher.doFinal(inputTextBytes,intOutOff)时,我得到了outputLengtheexception
代码>:
org.bouncycastle.crypto.outputLength异常:输出缓冲区太短
我不完全理解如何生成该整数来执行doFinal()
方法
以下是我尝试过的:
public class RijndaelAndRFC2899Implementation {
final static String WORD = "763059";
final static String PASSWORD = "515t3ma5m15B4d35";
final static byte[] SALT = new byte[]{1, 2, 3, 4, 5, 6, 7, 8};
final static int KEY_SIZE = 256;
final static int BLOCK_SIZE = 128;
final static int ITERATIONS = 1000;
public static void main(String[] args) throws Exception {
BufferedBlockCipher cipher = getCipher(PASSWORD, true);
byte[] inputText = WORD.getBytes("UTF-8");
byte asd[] = new byte[cipher.getOutputSize(inputText.length)];
int l = cipher.processBytes(inputText, 0, inputText.length, asd, 0);
int n = cipher.doFinal(inputText, l); //<---HERE PRODUCES OutputLengthException
}
private static BufferedBlockCipher getCipher(String password, boolean encrypt) throws Exception {
MessageDigest md = MessageDigest.getInstance("SHA-256");
md.update(password.getBytes("UTF-8"));
byte[] newPassword = md.digest();
PKCS5S2ParametersGenerator generator = new PKCS5S2ParametersGenerator();
generator.init(newPassword, SALT, ITERATIONS);
ParametersWithIV iv = ((ParametersWithIV) generator.generateDerivedParameters(KEY_SIZE, BLOCK_SIZE));
RijndaelEngine engine = new RijndaelEngine();
BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(engine));
cipher.init(encrypt, iv);
return cipher;
}
}
公共类RijndaelandRFC2899实现{
最终静态字符串WORD=“763059”;
最终静态字符串密码=“515t3ma5m15B4d35”;
最后一个静态字节[]SALT=新字节[]{1,2,3,4,5,6,7,8};
最终静态整数键大小=256;
最终静态整型块大小=128;
最终静态整数迭代=1000;
公共静态void main(字符串[]args)引发异常{
BufferedBlockCipher cipher=getCipher(密码,true);
字节[]inputText=WORD.getBytes(“UTF-8”);
字节asd[]=新字节[cipher.getOutputSize(inputText.length)];
int l=cipher.processBytes(inputText,0,inputText.length,asd,0);
int n=cipher.doFinal(inputText,l);//调用doFinal()
应该将输出数组作为第一个参数-而不是您正在处理的输入:
public static void main(String[] args) throws Exception {
BufferedBlockCipher cipher = getCipher(PASSWORD, true);
byte[] inputText = WORD.getBytes("UTF-8");
byte asd[] = new byte[cipher.getOutputSize(inputText.length)];
int l = cipher.processBytes(inputText, 0, inputText.length, asd, 0);
int n = cipher.doFinal(asd, l); // <--- Change to asd
}
publicstaticvoidmain(字符串[]args)引发异常{
BufferedBlockCipher cipher=getCipher(密码,true);
字节[]inputText=WORD.getBytes(“UTF-8”);
字节asd[]=新字节[cipher.getOutputSize(inputText.length)];
int l=cipher.processBytes(inputText,0,inputText.length,asd,0);
int n=cipher.doFinal(asd,l);//对doFinal()
的调用应该将输出数组作为第一个参数,而不是您正在处理的输入:
public static void main(String[] args) throws Exception {
BufferedBlockCipher cipher = getCipher(PASSWORD, true);
byte[] inputText = WORD.getBytes("UTF-8");
byte asd[] = new byte[cipher.getOutputSize(inputText.length)];
int l = cipher.processBytes(inputText, 0, inputText.length, asd, 0);
int n = cipher.doFinal(asd, l); // <--- Change to asd
}
publicstaticvoidmain(字符串[]args)引发异常{
BufferedBlockCipher cipher=getCipher(密码,true);
字节[]inputText=WORD.getBytes(“UTF-8”);
字节asd[]=新字节[cipher.getOutputSize(inputText.length)];
int l=cipher.processBytes(inputText,0,inputText.length,asd,0);
int n=cipher.doFinal(asd,l);//还要注意doFinal的返回值('n');根据密码算法,getOutputSize可能高估了实际输出大小,因此输出可能没有完全填满输出缓冲区('asd')。返回值是增量输出长度,因此您可能还需要“int n=l+cipher.doFinal(asd,l);”相反。还要注意doFinal的返回值('n');根据密码算法,getOutputSize可能高估了实际输出大小,因此输出可能没有完全填满输出缓冲区('asd'))。返回值是增量输出长度,因此您可能还希望使用“int n=l+cipher.doFinal(asd,l);”代替。