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ReadNTLM.cpp
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ReadNTLM.cpp
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/* vim: set ts=2 sw=2 et cindent: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 Mozilla.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by IBM Corporation are Copyright (C) 2003
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include "plbase64.h"
#include "nsStringAPI.h"
#include "prmem.h"
/*
* ReadNTLM : reads NTLM messages.
*
* based on http://davenport.sourceforge.net/ntlm.html
*/
#define kNegotiateUnicode 0x00000001
#define kNegotiateOEM 0x00000002
#define kRequestTarget 0x00000004
#define kUnknown1 0x00000008
#define kNegotiateSign 0x00000010
#define kNegotiateSeal 0x00000020
#define kNegotiateDatagramStyle 0x00000040
#define kNegotiateLanManagerKey 0x00000080
#define kNegotiateNetware 0x00000100
#define kNegotiateNTLMKey 0x00000200
#define kUnknown2 0x00000400
#define kUnknown3 0x00000800
#define kNegotiateDomainSupplied 0x00001000
#define kNegotiateWorkstationSupplied 0x00002000
#define kNegotiateLocalCall 0x00004000
#define kNegotiateAlwaysSign 0x00008000
#define kTargetTypeDomain 0x00010000
#define kTargetTypeServer 0x00020000
#define kTargetTypeShare 0x00040000
#define kNegotiateNTLM2Key 0x00080000
#define kRequestInitResponse 0x00100000
#define kRequestAcceptResponse 0x00200000
#define kRequestNonNTSessionKey 0x00400000
#define kNegotiateTargetInfo 0x00800000
#define kUnknown4 0x01000000
#define kUnknown5 0x02000000
#define kUnknown6 0x04000000
#define kUnknown7 0x08000000
#define kUnknown8 0x10000000
#define kNegotiate128 0x20000000
#define kNegotiateKeyExchange 0x40000000
#define kNegotiate56 0x80000000
static const char NTLM_SIGNATURE[] = "NTLMSSP";
static const char NTLM_TYPE1_MARKER[] = { 0x01, 0x00, 0x00, 0x00 };
static const char NTLM_TYPE2_MARKER[] = { 0x02, 0x00, 0x00, 0x00 };
static const char NTLM_TYPE3_MARKER[] = { 0x03, 0x00, 0x00, 0x00 };
#define NTLM_MARKER_LEN 4
#define NTLM_TYPE1_HEADER_LEN 32
#define NTLM_TYPE2_HEADER_LEN 32
#define NTLM_TYPE3_HEADER_LEN 64
#define LM_HASH_LEN 16
#define LM_RESP_LEN 24
#define NTLM_HASH_LEN 16
#define NTLM_RESP_LEN 24
static void PrintFlags(PRUint32 flags)
{
#define TEST(_flag) \
if (flags & k ## _flag) \
printf(" 0x%08x (" # _flag ")\n", k ## _flag)
TEST(NegotiateUnicode);
TEST(NegotiateOEM);
TEST(RequestTarget);
TEST(Unknown1);
TEST(NegotiateSign);
TEST(NegotiateSeal);
TEST(NegotiateDatagramStyle);
TEST(NegotiateLanManagerKey);
TEST(NegotiateNetware);
TEST(NegotiateNTLMKey);
TEST(Unknown2);
TEST(Unknown3);
TEST(NegotiateDomainSupplied);
TEST(NegotiateWorkstationSupplied);
TEST(NegotiateLocalCall);
TEST(NegotiateAlwaysSign);
TEST(TargetTypeDomain);
TEST(TargetTypeServer);
TEST(TargetTypeShare);
TEST(NegotiateNTLM2Key);
TEST(RequestInitResponse);
TEST(RequestAcceptResponse);
TEST(RequestNonNTSessionKey);
TEST(NegotiateTargetInfo);
TEST(Unknown4);
TEST(Unknown5);
TEST(Unknown6);
TEST(Unknown7);
TEST(Unknown8);
TEST(Negotiate128);
TEST(NegotiateKeyExchange);
TEST(Negotiate56);
#undef TEST
}
static void
PrintBuf(const char *tag, const PRUint8 *buf, PRUint32 bufLen)
{
int i;
printf("%s =\n", tag);
while (bufLen > 0)
{
int count = bufLen;
if (count > 8)
count = 8;
printf(" ");
for (i=0; i<count; ++i)
{
printf("0x%02x ", int(buf[i]));
}
for (; i<8; ++i)
{
printf(" ");
}
printf(" ");
for (i=0; i<count; ++i)
{
if (isprint(buf[i]))
printf("%c", buf[i]);
else
printf(".");
}
printf("\n");
bufLen -= count;
buf += count;
}
}
static PRUint16
ReadUint16(const PRUint8 *&buf)
{
PRUint16 x;
#ifdef IS_BIG_ENDIAN
x = ((PRUint16) buf[1]) | ((PRUint16) buf[0] << 8);
#else
x = ((PRUint16) buf[0]) | ((PRUint16) buf[1] << 8);
#endif
buf += sizeof(x);
return x;
}
static PRUint32
ReadUint32(const PRUint8 *&buf)
{
PRUint32 x;
#ifdef IS_BIG_ENDIAN
x = ( (PRUint32) buf[3]) |
(((PRUint32) buf[2]) << 8) |
(((PRUint32) buf[1]) << 16) |
(((PRUint32) buf[0]) << 24);
#else
x = ( (PRUint32) buf[0]) |
(((PRUint32) buf[1]) << 8) |
(((PRUint32) buf[2]) << 16) |
(((PRUint32) buf[3]) << 24);
#endif
buf += sizeof(x);
return x;
}
typedef struct {
PRUint16 length;
PRUint16 capacity;
PRUint32 offset;
} SecBuf;
static void
ReadSecBuf(SecBuf *s, const PRUint8 *&buf)
{
s->length = ReadUint16(buf);
s->capacity = ReadUint16(buf);
s->offset = ReadUint32(buf);
}
static void
ReadType1MsgBody(const PRUint8 *inBuf, PRUint32 start)
{
const PRUint8 *cursor = inBuf + start;
PRUint32 flags;
PrintBuf("flags", cursor, 4);
// read flags
flags = ReadUint32(cursor);
PrintFlags(flags);
// type 1 message may not include trailing security buffers
if ((flags & kNegotiateDomainSupplied) |
(flags & kNegotiateWorkstationSupplied))
{
SecBuf secbuf;
ReadSecBuf(&secbuf, cursor);
PrintBuf("supplied domain", inBuf + secbuf.offset, secbuf.length);
ReadSecBuf(&secbuf, cursor);
PrintBuf("supplied workstation", inBuf + secbuf.offset, secbuf.length);
}
}
static void
ReadType2MsgBody(const PRUint8 *inBuf, PRUint32 start)
{
PRUint16 targetLen, offset;
PRUint32 flags;
const PRUint8 *target;
const PRUint8 *cursor = inBuf + start;
// read target name security buffer
targetLen = ReadUint16(cursor);
ReadUint16(cursor); // discard next 16-bit value
offset = ReadUint32(cursor); // get offset from inBuf
target = inBuf + offset;
PrintBuf("target", target, targetLen);
PrintBuf("flags", cursor, 4);
// read flags
flags = ReadUint32(cursor);
PrintFlags(flags);
// read challenge
PrintBuf("challenge", cursor, 8);
cursor += 8;
PrintBuf("context", cursor, 8);
cursor += 8;
SecBuf secbuf;
ReadSecBuf(&secbuf, cursor);
PrintBuf("target information", inBuf + secbuf.offset, secbuf.length);
}
static void
ReadType3MsgBody(const PRUint8 *inBuf, PRUint32 start)
{
const PRUint8 *cursor = inBuf + start;
SecBuf secbuf;
ReadSecBuf(&secbuf, cursor); // LM response
PrintBuf("LM response", inBuf + secbuf.offset, secbuf.length);
ReadSecBuf(&secbuf, cursor); // NTLM response
PrintBuf("NTLM response", inBuf + secbuf.offset, secbuf.length);
ReadSecBuf(&secbuf, cursor); // domain name
PrintBuf("domain name", inBuf + secbuf.offset, secbuf.length);
ReadSecBuf(&secbuf, cursor); // user name
PrintBuf("user name", inBuf + secbuf.offset, secbuf.length);
ReadSecBuf(&secbuf, cursor); // workstation name
PrintBuf("workstation name", inBuf + secbuf.offset, secbuf.length);
ReadSecBuf(&secbuf, cursor); // session key
PrintBuf("session key", inBuf + secbuf.offset, secbuf.length);
PRUint32 flags = ReadUint32(cursor);
PrintBuf("flags", (const PRUint8 *) &flags, sizeof(flags));
PrintFlags(flags);
}
static void
ReadMsg(const char *base64buf, PRUint32 bufLen)
{
PRUint8 *inBuf = (PRUint8 *) PL_Base64Decode(base64buf, bufLen, NULL);
if (!inBuf)
{
printf("PL_Base64Decode failed\n");
return;
}
const PRUint8 *cursor = inBuf;
PrintBuf("signature", cursor, 8);
// verify NTLMSSP signature
if (memcmp(cursor, NTLM_SIGNATURE, sizeof(NTLM_SIGNATURE)) != 0)
{
printf("### invalid or corrupt NTLM signature\n");
}
cursor += sizeof(NTLM_SIGNATURE);
PrintBuf("message type", cursor, 4);
if (memcmp(cursor, NTLM_TYPE1_MARKER, sizeof(NTLM_MARKER_LEN)) == 0)
ReadType1MsgBody(inBuf, 12);
else if (memcmp(cursor, NTLM_TYPE2_MARKER, sizeof(NTLM_MARKER_LEN)) == 0)
ReadType2MsgBody(inBuf, 12);
else if (memcmp(cursor, NTLM_TYPE3_MARKER, sizeof(NTLM_MARKER_LEN)) == 0)
ReadType3MsgBody(inBuf, 12);
else
printf("### invalid or unknown message type\n");
PR_Free(inBuf);
}
int main(int argc, char **argv)
{
if (argc == 1)
{
printf("usage: ntlmread <msg>\n");
return -1;
}
ReadMsg(argv[1], (PRUint32) strlen(argv[1]));
return 0;
}