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Devin Jankowski
2023-06-21 12:46:23 -04:00
commit c70248a520
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105
iTechSharp/iTextSharp/text/pdf/crypto/AESCipher.cs Normal file
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using System;
using Org.BouncyCastle.Crypto.Modes;
using Org.BouncyCastle.Crypto.Paddings;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
/*
* $Id: AESCipher.cs,v 1.4 2007/03/06 12:29:31 psoares33 Exp $
*
* Copyright 2006 Paulo Soares
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text.pdf.crypto {
/**
* Creates an AES Cipher with CBC and padding PKCS5/7.
* @author Paulo Soares (psoares@consiste.pt)
*/
public class AESCipher {
private PaddedBufferedBlockCipher bp;
/** Creates a new instance of AESCipher */
public AESCipher(bool forEncryption, byte[] key, byte[] iv) {
IBlockCipher aes = new AesFastEngine();
IBlockCipher cbc = new CbcBlockCipher(aes);
bp = new PaddedBufferedBlockCipher(cbc);
KeyParameter kp = new KeyParameter(key);
ParametersWithIV piv = new ParametersWithIV(kp, iv);
bp.Init(forEncryption, piv);
}
public byte[] Update(byte[] inp, int inpOff, int inpLen) {
int neededLen = bp.GetUpdateOutputSize(inpLen);
byte[] outp = null;
if (neededLen > 0)
outp = new byte[neededLen];
else
neededLen = 0;
bp.ProcessBytes(inp, inpOff, inpLen, outp, 0);
return outp;
}
public byte[] DoFinal() {
int neededLen = bp.GetOutputSize(0);
byte[] outp = new byte[neededLen];
int n = 0;
try {
n = bp.DoFinal(outp, 0);
}
catch {
return outp;
}
if (n != outp.Length) {
byte[] outp2 = new byte[n];
System.Array.Copy(outp, 0, outp2, 0, n);
return outp2;
}
else
return outp;
}
}
}

108
iTechSharp/iTextSharp/text/pdf/crypto/ARCFOUREncryption.cs Normal file
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using System;
/*
* $Id: ARCFOUREncryption.cs,v 1.1 2007/04/19 16:41:32 psoares33 Exp $
*
* Copyright 2006 Paulo Soares
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text.pdf.crypto {
public class ARCFOUREncryption {
private byte[] state = new byte[256];
private int x;
private int y;
/** Creates a new instance of ARCFOUREncryption */
public ARCFOUREncryption() {
}
public void PrepareARCFOURKey(byte[] key) {
PrepareARCFOURKey(key, 0, key.Length);
}
public void PrepareARCFOURKey(byte[] key, int off, int len) {
int index1 = 0;
int index2 = 0;
for (int k = 0; k < 256; ++k)
state[k] = (byte)k;
x = 0;
y = 0;
byte tmp;
for (int k = 0; k < 256; ++k) {
index2 = (key[index1 + off] + state[k] + index2) & 255;
tmp = state[k];
state[k] = state[index2];
state[index2] = tmp;
index1 = (index1 + 1) % len;
}
}
public void EncryptARCFOUR(byte[] dataIn, int off, int len, byte[] dataOut, int offOut) {
int length = len + off;
byte tmp;
for (int k = off; k < length; ++k) {
x = (x + 1) & 255;
y = (state[x] + y) & 255;
tmp = state[x];
state[x] = state[y];
state[y] = tmp;
dataOut[k - off + offOut] = (byte)(dataIn[k] ^ state[(state[x] + state[y]) & 255]);
}
}
public void EncryptARCFOUR(byte[] data, int off, int len) {
EncryptARCFOUR(data, off, len, data, off);
}
public void EncryptARCFOUR(byte[] dataIn, byte[] dataOut) {
EncryptARCFOUR(dataIn, 0, dataIn.Length, dataOut, 0);
}
public void EncryptARCFOUR(byte[] data) {
EncryptARCFOUR(data, 0, data.Length, data, 0);
}
}
}

97
iTechSharp/iTextSharp/text/pdf/crypto/IVGenerator.cs Normal file
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using System;
/*
* $Id: IVGenerator.cs,v 1.5 2008/04/17 15:37:19 psoares33 Exp $
*
* Copyright 2006 Paulo Soares
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text.pdf.crypto {
/**
* An initialization vector generator for a CBC block encryption. It's a random generator based on RC4.
* @author Paulo Soares (psoares@consiste.pt)
*/
public sealed class IVGenerator {
private static ARCFOUREncryption rc4;
static IVGenerator(){
rc4 = new ARCFOUREncryption();
byte[] longBytes = new byte[8];
long val = DateTime.Now.Ticks;
for (int i = 0; i != 8; i++) {
longBytes[i] = (byte)val;
val = (long)((ulong)val >> 8);
}
rc4.PrepareARCFOURKey(longBytes);
}
/** Creates a new instance of IVGenerator */
private IVGenerator() {
}
/**
* Gets a 16 byte random initialization vector.
* @return a 16 byte random initialization vector
*/
public static byte[] GetIV() {
return GetIV(16);
}
/**
* Gets a random initialization vector.
* @param len the length of the initialization vector
* @return a random initialization vector
*/
public static byte[] GetIV(int len) {
byte[] b = new byte[len];
lock (rc4) {
rc4.EncryptARCFOUR(b);
}
return b;
}
}
}