Diff: lwip/netif/ppp/chpms.c

Revision:

12:8dc6b255af6c

Parent:

11:da4498f591ee

--- a/lwip/netif/ppp/chpms.c	Thu Aug 05 15:01:33 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,396 +0,0 @@
-/*** WARNING - THIS CODE HAS NOT BEEN FINISHED! ***/
-/*** The original PPPD code is written in a way to require either the UNIX DES
-     encryption functions encrypt(3) and setkey(3) or the DES library libdes.
-     Since both is not included in lwIP, MSCHAP currently does not work! */
-/*****************************************************************************
-* chpms.c - Network MicroSoft Challenge Handshake Authentication Protocol program file.
-*
-* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
-* Copyright (c) 1997 by Global Election Systems Inc.  All rights reserved.
-*
-* The authors hereby grant permission to use, copy, modify, distribute,
-* and license this software and its documentation for any purpose, provided
-* that existing copyright notices are retained in all copies and that this
-* notice and the following disclaimer are included verbatim in any 
-* distributions. No written agreement, license, or royalty fee is required
-* for any of the authorized uses.
-*
-* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
-* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
-* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*
-******************************************************************************
-* REVISION HISTORY
-*
-* 03-01-01 Marc Boucher <marc@mbsi.ca>
-*   Ported to lwIP.
-* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
-*   Original based on BSD chap_ms.c.
-*****************************************************************************/
-/*
- * chap_ms.c - Microsoft MS-CHAP compatible implementation.
- *
- * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
- * http://www.strataware.com/
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Eric Rosenquist.  The name of the author may not be used to
- * endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-/*
- * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
- *
- *   Implemented LANManager type password response to MS-CHAP challenges.
- *   Now pppd provides both NT style and LANMan style blocks, and the
- *   prefered is set by option "ms-lanman". Default is to use NT.
- *   The hash text (StdText) was taken from Win95 RASAPI32.DLL.
- *
- *   You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
- */
-
-#define USE_CRYPT
-
-#include "lwip/opt.h"
-
-#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
-
-#if MSCHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
-
-#include "ppp.h"
-#include "pppdebug.h"
-
-#include "md4.h"
-#ifndef USE_CRYPT
-#include "des.h"
-#endif
-#include "chap.h"
-#include "chpms.h"
-
-#include <string.h>
-
-
-/*************************/
-/*** LOCAL DEFINITIONS ***/
-/*************************/
-
-
-/************************/
-/*** LOCAL DATA TYPES ***/
-/************************/
-typedef struct {
-    u_char LANManResp[24];
-    u_char NTResp[24];
-    u_char UseNT; /* If 1, ignore the LANMan response field */
-} MS_ChapResponse;
-/* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
-   in case this struct gets padded. */
-
-
-
-/***********************************/
-/*** LOCAL FUNCTION DECLARATIONS ***/
-/***********************************/
-
-/* XXX Don't know what to do with these. */
-extern void setkey(const char *);
-extern void encrypt(char *, int);
-
-static void DesEncrypt (u_char *, u_char *, u_char *);
-static void MakeKey (u_char *, u_char *);
-
-#ifdef USE_CRYPT
-static void Expand (u_char *, u_char *);
-static void Collapse (u_char *, u_char *);
-#endif
-
-static void ChallengeResponse(
-  u_char *challenge, /* IN   8 octets */
-  u_char *pwHash,    /* IN  16 octets */
-  u_char *response   /* OUT 24 octets */
-);
-static void ChapMS_NT(
-  char *rchallenge,
-  int rchallenge_len,
-  char *secret,
-  int secret_len,
-  MS_ChapResponse *response
-);
-static u_char Get7Bits(
-  u_char *input,
-  int startBit
-);
-
-static void
-ChallengeResponse( u_char *challenge, /* IN   8 octets */
-                   u_char *pwHash,    /* IN  16 octets */
-                   u_char *response   /* OUT 24 octets */)
-{
-  u_char    ZPasswordHash[21];
-
-  BZERO(ZPasswordHash, sizeof(ZPasswordHash));
-  BCOPY(pwHash, ZPasswordHash, 16);
-
-#if 0
-  log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
-#endif
-
-  DesEncrypt(challenge, ZPasswordHash +  0, response + 0);
-  DesEncrypt(challenge, ZPasswordHash +  7, response + 8);
-  DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
-
-#if 0
-  log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
-#endif
-}
-
-
-#ifdef USE_CRYPT
-static void
-DesEncrypt( u_char *clear, /* IN  8 octets */
-            u_char *key,   /* IN  7 octets */
-            u_char *cipher /* OUT 8 octets */)
-{
-  u_char des_key[8];
-  u_char crypt_key[66];
-  u_char des_input[66];
-
-  MakeKey(key, des_key);
-
-  Expand(des_key, crypt_key);
-  setkey((char*)crypt_key);
-
-#if 0
-  CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
-             clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
-#endif
-
-  Expand(clear, des_input);
-  encrypt((char*)des_input, 0);
-  Collapse(des_input, cipher);
-
-#if 0
-  CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
-             cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
-#endif
-}
-
-#else /* USE_CRYPT */
-
-static void
-DesEncrypt( u_char *clear, /* IN  8 octets */
-            u_char *key,   /* IN  7 octets */
-            u_char *cipher /* OUT 8 octets */)
-{
-  des_cblock    des_key;
-  des_key_schedule  key_schedule;
-
-  MakeKey(key, des_key);
-
-  des_set_key(&des_key, key_schedule);
-
-#if 0
-  CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
-             clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
-#endif
-
-  des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
-
-#if 0
-  CHAPDEBUG(LOG_INFO, ("DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
-             cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
-#endif
-}
-
-#endif /* USE_CRYPT */
-
-
-static u_char
-Get7Bits( u_char *input, int startBit)
-{
-  register unsigned int  word;
-
-  word  = (unsigned)input[startBit / 8] << 8;
-  word |= (unsigned)input[startBit / 8 + 1];
-
-  word >>= 15 - (startBit % 8 + 7);
-
-  return word & 0xFE;
-}
-
-#ifdef USE_CRYPT
-
-/* in == 8-byte string (expanded version of the 56-bit key)
- * out == 64-byte string where each byte is either 1 or 0
- * Note that the low-order "bit" is always ignored by by setkey()
- */
-static void
-Expand(u_char *in, u_char *out)
-{
-  int j, c;
-  int i;
-
-  for(i = 0; i < 64; in++){
-    c = *in;
-    for(j = 7; j >= 0; j--) {
-      *out++ = (c >> j) & 01;
-    }
-    i += 8;
-  }
-}
-
-/* The inverse of Expand
- */
-static void
-Collapse(u_char *in, u_char *out)
-{
-  int j;
-  int i;
-  unsigned int c;
-
-  for (i = 0; i < 64; i += 8, out++) {
-    c = 0;
-    for (j = 7; j >= 0; j--, in++) {
-      c |= *in << j;
-    }
-    *out = c & 0xff;
-  }
-}
-#endif
-
-static void
-MakeKey( u_char *key,    /* IN  56 bit DES key missing parity bits */
-         u_char *des_key /* OUT 64 bit DES key with parity bits added */)
-{
-  des_key[0] = Get7Bits(key,  0);
-  des_key[1] = Get7Bits(key,  7);
-  des_key[2] = Get7Bits(key, 14);
-  des_key[3] = Get7Bits(key, 21);
-  des_key[4] = Get7Bits(key, 28);
-  des_key[5] = Get7Bits(key, 35);
-  des_key[6] = Get7Bits(key, 42);
-  des_key[7] = Get7Bits(key, 49);
-  
-#ifndef USE_CRYPT
-  des_set_odd_parity((des_cblock *)des_key);
-#endif
-  
-#if 0
-  CHAPDEBUG(LOG_INFO, ("MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X\n",
-             key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
-  CHAPDEBUG(LOG_INFO, ("MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
-             des_key[0], des_key[1], des_key[2], des_key[3], des_key[4], des_key[5], des_key[6], des_key[7]));
-#endif
-}
-
-static void
-ChapMS_NT( char *rchallenge,
-           int rchallenge_len,
-           char *secret,
-           int secret_len,
-           MS_ChapResponse *response)
-{
-  int      i;
-  MDstruct  md4Context;
-  u_char    unicodePassword[MAX_NT_PASSWORD * 2];
-  static int  low_byte_first = -1;
-
-  LWIP_UNUSED_ARG(rchallenge_len);
-
-  /* Initialize the Unicode version of the secret (== password). */
-  /* This implicitly supports 8-bit ISO8859/1 characters. */
-  BZERO(unicodePassword, sizeof(unicodePassword));
-  for (i = 0; i < secret_len; i++) {
-    unicodePassword[i * 2] = (u_char)secret[i];
-  }
-  MDbegin(&md4Context);
-  MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8);  /* Unicode is 2 bytes/char, *8 for bit count */
-
-  if (low_byte_first == -1) {
-    low_byte_first = (PP_HTONS((unsigned short int)1) != 1);
-  }
-  if (low_byte_first == 0) {
-    /* @todo: arg type - u_long* or u_int* ? */
-    MDreverse((unsigned int*)&md4Context);  /*  sfb 961105 */
-  }
-
-  MDupdate(&md4Context, NULL, 0);  /* Tell MD4 we're done */
-
-  ChallengeResponse((u_char*)rchallenge, (u_char*)md4Context.buffer, response->NTResp);
-}
-
-#ifdef MSLANMAN
-static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
-
-static void
-ChapMS_LANMan( char *rchallenge,
-               int rchallenge_len,
-               char *secret,
-               int secret_len,
-               MS_ChapResponse  *response)
-{
-  int      i;
-  u_char    UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
-  u_char    PasswordHash[16];
-  
-  /* LANMan password is case insensitive */
-  BZERO(UcasePassword, sizeof(UcasePassword));
-  for (i = 0; i < secret_len; i++) {
-    UcasePassword[i] = (u_char)toupper(secret[i]);
-  }
-  DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
-  DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
-  ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
-}
-#endif
-
-void
-ChapMS( chap_state *cstate, char *rchallenge, int rchallenge_len, char *secret, int secret_len)
-{
-  MS_ChapResponse response;
-#ifdef MSLANMAN
-  extern int ms_lanman;
-#endif
-
-#if 0
-  CHAPDEBUG(LOG_INFO, ("ChapMS: secret is '%.*s'\n", secret_len, secret));
-#endif
-  BZERO(&response, sizeof(response));
-
-  /* Calculate both always */
-  ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
-
-#ifdef MSLANMAN
-  ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
-
-  /* prefered method is set by option  */
-  response.UseNT = !ms_lanman;
-#else
-  response.UseNT = 1;
-#endif
-
-  BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
-  cstate->resp_length = MS_CHAP_RESPONSE_LEN;
-}
-
-#endif /* MSCHAP_SUPPORT */
-
-#endif /* PPP_SUPPORT */