470 lines
14 KiB
C++
470 lines
14 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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/* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
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*/
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/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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rights reserved.
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License to copy and use this software is granted provided that it
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is identified as the "RSA Data Security, Inc. MD5 Message-Digest
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Algorithm" in all material mentioning or referencing this software
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or this function.
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License is also granted to make and use derivative works provided
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that such works are identified as "derived from the RSA Data
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Security, Inc. MD5 Message-Digest Algorithm" in all material
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mentioning or referencing the derived work.
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RSA Data Security, Inc. makes no representations concerning either
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the merchantability of this software or the suitability of this
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software for any particular purpose. It is provided "as is"
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without express or implied warranty of any kind.
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These notices must be retained in any copies of any part of this
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documentation and/or software.
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*/
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#include "stdmisc.h"
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#include "nel/misc/md5.h"
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#include "nel/misc/types_nl.h"
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#include "nel/misc/debug.h"
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#include "nel/misc/file.h"
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#include "nel/misc/path.h"
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#include "nel/misc/stream.h"
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using namespace std;
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#ifdef DEBUG_NEW
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#define new DEBUG_NEW
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#endif
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namespace NLMISC
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{
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// ****************************************************************************
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// ****************************************************************************
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// High Level Routines
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// ****************************************************************************
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// ****************************************************************************
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// ****************************************************************************
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CHashKeyMD5 getMD5(const std::string &filename)
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{
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CMD5Context md5ctx;
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CHashKeyMD5 Message_Digest;
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Message_Digest.clear();
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CIFile ifile;
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if (!ifile.open(CPath::lookup(filename)))
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{
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nlwarning ("MD5: Can't open the file '%s'", filename.c_str());
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return Message_Digest;
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}
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md5ctx.init();
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uint8 buffer[1024];
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int bufferSize = 1024;
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sint fs = ifile.getFileSize();
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sint n, read = 0;
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do
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{
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//bs = (int)fread (buffer, 1, bufferSize, fp);
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n = std::min (bufferSize, fs-read);
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//nlinfo ("read %d bytes", n);
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ifile.serialBuffer((uint8 *)buffer, n);
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md5ctx.update(buffer, n);
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read += n;
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}
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while (!ifile.eof());
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ifile.close ();
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md5ctx.final(Message_Digest);
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return Message_Digest;
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}
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// ****************************************************************************
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CHashKeyMD5 getMD5(const uint8 *buffer, uint32 size)
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{
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CMD5Context md5ctx;
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CHashKeyMD5 Message_Digest;
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Message_Digest.clear();
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md5ctx.init();
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md5ctx.update(buffer, size);
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md5ctx.final(Message_Digest);
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return Message_Digest;
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}
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// ****************************************************************************
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// Helper
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// ****************************************************************************
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static bool fromHex(char c, uint8 &x)
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{
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if (c >= '0' && c <= '9')
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{
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x = c - '0';
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return true;
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}
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else if (c >= 'A' && c <= 'F')
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{
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x = c - 'A' + 10;
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return true;
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}
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else if (c >= 'a' && c <= 'f')
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{
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x = c - 'a' + 10;
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return true;
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}
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nlwarning("cannot convert to hexa");
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return false;
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}
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// ****************************************************************************
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// ****************************************************************************
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// CHashKeyMD5
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// ****************************************************************************
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// ****************************************************************************
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// ****************************************************************************
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void CHashKeyMD5::clear()
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{
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for (uint32 i = 0; i < 16; ++i)
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Data[i] = 0;
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}
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// ****************************************************************************
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string CHashKeyMD5::toString() const
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{
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string sTmp;
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for (uint32 i = 0; i < 16; ++i)
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sTmp += NLMISC::toString("%02x", Data[i]);
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return sTmp;
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}
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// ****************************************************************************
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bool CHashKeyMD5::fromString(const std::string &in)
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{
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if (in.size() != 32)
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{
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nlwarning("bad string size");
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return false;
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}
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for (uint32 i = 0; i < 16; ++i)
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{
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char c1 = in[2*i];
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char c2 = in[2*i+1];
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uint8 x1, x2;
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if (!fromHex(c1, x1)) return false;
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if (!fromHex(c2, x2)) return false;
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Data[i] = (x1 << 4) | x2;
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}
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return true;
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}
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// ****************************************************************************
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bool CHashKeyMD5::operator!=(const CHashKeyMD5 &in) const
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{
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for (uint32 i = 0; i < 16; ++i)
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if (Data[i] != in.Data[i])
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return true;
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return false;
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}
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// ****************************************************************************
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bool CHashKeyMD5::operator==(const CHashKeyMD5 &in) const
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{
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return !operator!=(in);
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}
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// ****************************************************************************
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bool CHashKeyMD5::operator<(const CHashKeyMD5 &in) const
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{
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for (uint32 i = 0; i < 16; ++i)
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if (Data[i] >= in.Data[i])
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return false;
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return true;
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}
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// ****************************************************************************
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void CHashKeyMD5::serial (NLMISC::IStream &s)
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{
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s.serialBuffer(Data,16);
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}
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// ****************************************************************************
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// ****************************************************************************
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// CMD5Context
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// ****************************************************************************
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// ****************************************************************************
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uint8 CMD5Context::Padding[64] = {
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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// ****************************************************************************
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void CMD5Context::init()
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{
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Count[0] = Count[1] = 0;
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// Load magic initialization constants.
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State[0] = 0x67452301;
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State[1] = 0xefcdab89;
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State[2] = 0x98badcfe;
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State[3] = 0x10325476;
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}
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// ****************************************************************************
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void CMD5Context::update (const uint8 *pBufIn, uint32 nBufLength)
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{
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uint i, index, partLen;
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// Compute number of bytes mod 64
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index = (uint)((Count[0] >> 3) & 0x3F);
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// Update number of bits
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if ((Count[0] += (nBufLength << 3)) < (nBufLength << 3))
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Count[1]++;
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Count[1] += (nBufLength >> 29);
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partLen = 64 - index;
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// Transform as many times as possible.
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if (nBufLength >= partLen)
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{
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memcpy((uint8*)&Buffer[index], pBufIn, partLen);
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transform (State, Buffer);
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for (i = partLen; i + 63 < nBufLength; i += 64)
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transform (State, &pBufIn[i]);
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index = 0;
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}
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else
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{
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i = 0;
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}
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// Buffer remaining input
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memcpy((uint8*)&Buffer[index], &pBufIn[i], nBufLength-i);
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}
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// ****************************************************************************
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void CMD5Context::final (CHashKeyMD5 &out)
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{
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uint8 bits[8];
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uint index, padLen;
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// Save number of bits
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encode (&bits[0], Count, 8);
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// Pad out to 56 mod 64.
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index = (unsigned int)((Count[0] >> 3) & 0x3f);
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padLen = (index < 56) ? (56 - index) : (120 - index);
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update (Padding, padLen);
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// Append length (before padding)
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update (&bits[0], 8);
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// Store state in digest
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encode (out.Data, State, 16);
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// Zeroize sensitive information.
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uint i;
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for (i = 0; i < 4; ++i) State[i] = 0;
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for (i = 0; i < 2; ++i) Count[i] = 0;
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for (i = 0; i < 64; ++i) Buffer[i] = 0;
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}
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// Constants for MD5Transform routine.
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// ****************************************************************************
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#define S11 7
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#define S12 12
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#define S13 17
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#define S14 22
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#define S21 5
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#define S22 9
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#define S23 14
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#define S24 20
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#define S31 4
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#define S32 11
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#define S33 16
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#define S34 23
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#define S41 6
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#define S42 10
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#define S43 15
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#define S44 21
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// F, G, H and I are basic MD5 functions.
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#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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#define I(x, y, z) ((y) ^ ((x) | (~z)))
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// ROTATE_LEFT rotates x left n bits.
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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// FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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// Rotation is separate from addition to prevent recomputation.
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#define FF(a, b, c, d, x, s, ac) { \
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(a) += F ((b), (c), (d)) + (x) + (uint32)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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#define GG(a, b, c, d, x, s, ac) { \
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(a) += G ((b), (c), (d)) + (x) + (uint32)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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#define HH(a, b, c, d, x, s, ac) { \
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(a) += H ((b), (c), (d)) + (x) + (uint32)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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#define II(a, b, c, d, x, s, ac) { \
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(a) += I ((b), (c), (d)) + (x) + (uint32)(ac); \
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(a) = ROTATE_LEFT ((a), (s)); \
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(a) += (b); \
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}
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// MD5 basic transformation. Transforms state based on block.
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// ****************************************************************************
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void CMD5Context::transform (uint32 state[4], const uint8 block[64])
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{
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uint32 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
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decode (&x[0], &block[0], 64);
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// Round 1
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FF (a, b, c, d, x[ 0], S11, 0xd76aa478); // 1
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FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); // 2
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FF (c, d, a, b, x[ 2], S13, 0x242070db); // 3
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FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); // 4
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FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); // 5
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FF (d, a, b, c, x[ 5], S12, 0x4787c62a); // 6
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FF (c, d, a, b, x[ 6], S13, 0xa8304613); // 7
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FF (b, c, d, a, x[ 7], S14, 0xfd469501); // 8
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FF (a, b, c, d, x[ 8], S11, 0x698098d8); // 9
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FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); // 10
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FF (c, d, a, b, x[10], S13, 0xffff5bb1); // 11
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FF (b, c, d, a, x[11], S14, 0x895cd7be); // 12
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FF (a, b, c, d, x[12], S11, 0x6b901122); // 13
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FF (d, a, b, c, x[13], S12, 0xfd987193); // 14
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FF (c, d, a, b, x[14], S13, 0xa679438e); // 15
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FF (b, c, d, a, x[15], S14, 0x49b40821); // 16
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// Round 2
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GG (a, b, c, d, x[ 1], S21, 0xf61e2562); // 17
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GG (d, a, b, c, x[ 6], S22, 0xc040b340); // 18
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GG (c, d, a, b, x[11], S23, 0x265e5a51); // 19
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GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); // 20
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GG (a, b, c, d, x[ 5], S21, 0xd62f105d); // 21
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GG (d, a, b, c, x[10], S22, 0x2441453); // 22
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GG (c, d, a, b, x[15], S23, 0xd8a1e681); // 23
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GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); // 24
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GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); // 25
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GG (d, a, b, c, x[14], S22, 0xc33707d6); // 26
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GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); // 27
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GG (b, c, d, a, x[ 8], S24, 0x455a14ed); // 28
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GG (a, b, c, d, x[13], S21, 0xa9e3e905); // 29
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GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); // 30
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GG (c, d, a, b, x[ 7], S23, 0x676f02d9); // 31
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GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); // 32
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// Round 3
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HH (a, b, c, d, x[ 5], S31, 0xfffa3942); // 33
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HH (d, a, b, c, x[ 8], S32, 0x8771f681); // 34
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HH (c, d, a, b, x[11], S33, 0x6d9d6122); // 35
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HH (b, c, d, a, x[14], S34, 0xfde5380c); // 36
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HH (a, b, c, d, x[ 1], S31, 0xa4beea44); // 37
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HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); // 38
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HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); // 39
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HH (b, c, d, a, x[10], S34, 0xbebfbc70); // 40
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HH (a, b, c, d, x[13], S31, 0x289b7ec6); // 41
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HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); // 42
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HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); // 43
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HH (b, c, d, a, x[ 6], S34, 0x4881d05); // 44
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HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); // 45
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HH (d, a, b, c, x[12], S32, 0xe6db99e5); // 46
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HH (c, d, a, b, x[15], S33, 0x1fa27cf8); // 47
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HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); // 48
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// Round 4
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II (a, b, c, d, x[ 0], S41, 0xf4292244); // 49
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II (d, a, b, c, x[ 7], S42, 0x432aff97); // 50
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II (c, d, a, b, x[14], S43, 0xab9423a7); // 51
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II (b, c, d, a, x[ 5], S44, 0xfc93a039); // 52
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II (a, b, c, d, x[12], S41, 0x655b59c3); // 53
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II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); // 54
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II (c, d, a, b, x[10], S43, 0xffeff47d); // 55
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II (b, c, d, a, x[ 1], S44, 0x85845dd1); // 56
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II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); // 57
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II (d, a, b, c, x[15], S42, 0xfe2ce6e0); // 58
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II (c, d, a, b, x[ 6], S43, 0xa3014314); // 59
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II (b, c, d, a, x[13], S44, 0x4e0811a1); // 60
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II (a, b, c, d, x[ 4], S41, 0xf7537e82); // 61
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II (d, a, b, c, x[11], S42, 0xbd3af235); // 62
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II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); // 63
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II (b, c, d, a, x[ 9], S44, 0xeb86d391); // 64
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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}
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// Encodes input (guint32) into output (unsigned char). Assumes len is a multiple of 4.
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// ****************************************************************************
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void CMD5Context::encode (uint8 *output, const uint32 *input, uint len)
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{
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uint i, j;
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for (i = 0, j = 0; j < len; i++, j += 4)
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{
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output[j] = (uint8)(input[i] & 0xff);
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output[j+1] = (uint8)((input[i] >> 8) & 0xff);
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output[j+2] = (uint8)((input[i] >> 16) & 0xff);
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output[j+3] = (uint8)((input[i] >> 24) & 0xff);
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}
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}
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// Decodes input (unsigned char) into output (guint32). Assumes len is a multiple of 4.
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// ****************************************************************************
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void CMD5Context::decode (uint32 *output, const uint8 *input, uint len)
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{
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uint i, j;
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for (i = 0, j = 0; j < len; i++, j += 4)
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output[i] = ((uint32)input[j]) | (((uint32)input[j+1]) << 8) |
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(((uint32)input[j+2]) << 16) | (((uint32)input[j+3]) << 24);
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}
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} // namespace NLMISC
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