/*
* chap_ms.c - Microsoft MS-CHAP compatible implementation.
*
- * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
- * http://www.strataware.com/
+ * Copyright (c) 1995 Eric Rosenquist. All rights reserved.
*
- * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * 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.
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * 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.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Implemented MS-CHAPv2 functionality, heavily based on sample
* implementation in RFC 2759. Implemented MPPE functionality,
* heavily based on sample implementation in RFC 3079.
- * Copyright (c) 2002 Google, Inc.
+ *
+ * Copyright (c) 2002 Google, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The name(s) of the authors of this software must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission.
+ *
+ * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
*/
-#define RCSID "$Id: chap_ms.c,v 1.21 2002/09/01 12:00:15 dfs Exp $"
+#define RCSID "$Id: chap_ms.c,v 1.28 2003/01/10 07:12:36 fcusack Exp $"
#ifdef CHAPMS
#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
-#ifdef HAVE_CRYPT_H
-#include <crypt.h>
-#endif
#include "pppd.h"
#include "chap.h"
#include "chap_ms.h"
#include "md4.h"
#include "sha1.h"
-
-#ifndef USE_CRYPT
-#include <des.h>
-#endif
+#include "pppcrypt.h"
static const char rcsid[] = RCSID;
static void ascii2unicode __P((char[], int, u_char[]));
static void NTPasswordHash __P((char *, int, u_char[MD4_SIGNATURE_SIZE]));
static void ChallengeResponse __P((u_char *, u_char *, u_char[24]));
-static void DesEncrypt __P((u_char *, u_char *, u_char[8]));
-static void MakeKey __P((u_char *, u_char *));
-static u_char Get7Bits __P((u_char *, int));
static void ChapMS_NT __P((u_char *, char *, int, u_char[24]));
static void ChapMS2_NT __P((char *, u_char[16], char *, char *, int,
u_char[24]));
static void ChapMS_LANMan __P((u_char *, char *, int, MS_ChapResponse *));
#endif
-#ifdef USE_CRYPT
-static void Expand __P((u_char *, u_char *));
-static void Collapse __P((u_char *, u_char *));
-#endif
-
#ifdef MPPE
static void Set_Start_Key __P((u_char *, char *, int));
static void SetMasterKeys __P((char *, int, u_char[24], int));
#ifdef MPPE
u_char mppe_send_key[MPPE_MAX_KEY_LEN];
u_char mppe_recv_key[MPPE_MAX_KEY_LEN];
+int mppe_keys_set = 0; /* Have the MPPE keys been set? */
+
+#include "fsm.h" /* Need to poke MPPE options */
+#include "ccp.h"
+#include <net/ppp-comp.h>
#endif
static void
u_char PasswordHash[MD4_SIGNATURE_SIZE],
u_char response[24])
{
- char ZPasswordHash[21];
+ u_char ZPasswordHash[21];
BZERO(ZPasswordHash, sizeof(ZPasswordHash));
BCOPY(PasswordHash, ZPasswordHash, MD4_SIGNATURE_SIZE);
sizeof(ZPasswordHash), ZPasswordHash);
#endif
- DesEncrypt(challenge, ZPasswordHash + 0, &response[0]);
- DesEncrypt(challenge, ZPasswordHash + 7, &response[8]);
- DesEncrypt(challenge, ZPasswordHash + 14, &response[16]);
+ (void) DesSetkey(ZPasswordHash + 0);
+ DesEncrypt(challenge, response + 0);
+ (void) DesSetkey(ZPasswordHash + 7);
+ DesEncrypt(challenge, response + 8);
+ (void) DesSetkey(ZPasswordHash + 14);
+ DesEncrypt(challenge, response + 16);
#if 0
dbglog("ChallengeResponse - response %.24B", response);
#endif
}
-
-#ifdef USE_CRYPT
-static void
-DesEncrypt(u_char *clear, u_char *key, u_char cipher[8])
-{
- 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(crypt_key);
-
-#if 0
- CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %.8B", clear));
-#endif
-
- Expand(clear, des_input);
- encrypt(des_input, 0);
- Collapse(des_input, cipher);
-
-#if 0
- CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %.8B", cipher));
-#endif
-}
-
-#else /* USE_CRYPT */
-
-static void
-DesEncrypt(u_char *clear, u_char *key, u_char cipher[8])
-{
- 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 : %.8B", clear));
-#endif
-
- des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
-
-#if 0
- CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %.8B", cipher));
-#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, u_char *des_key)
-{
- 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 : %.7B", key));
- CHAPDEBUG((LOG_INFO, "MakeKey: 64-bit output: %.8B", des_key));
-#endif
-}
-
-
static void
ChallengeHash(u_char PeerChallenge[16], u_char *rchallenge,
char *username, u_char Challenge[8])
static void
ChapMS_LANMan(u_char *rchallenge, char *secret, int secret_len,
- u_char LMResponse[24])
+ MS_ChapResponse *response)
{
int i;
u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
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, LMResponse);
+ (void) DesSetkey(UcasePassword + 0);
+ DesEncrypt( StdText, PasswordHash + 0 );
+ (void) DesSetkey(UcasePassword + 7);
+ DesEncrypt( StdText, PasswordHash + 8 );
+ ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
}
#endif
response->UseNT[0] = 1;
#endif
- cstate->resp_length = MS_CHAP_RESPONSE_LENGTH;
+ cstate->resp_length = MS_CHAP_RESPONSE_LEN;
#ifdef MPPE
Set_Start_Key(rchallenge, secret, secret_len);
+ mppe_keys_set = 1;
#endif
}
#ifdef MPPE
SetMasterKeys(secret, secret_len, response->NTResp, authenticator);
+ mppe_keys_set = 1;
#endif
}
+#ifdef MPPE
+/*
+ * Set MPPE options from plugins.
+ */
+void
+set_mppe_enc_types(int policy, int types)
+{
+ /* Early exit for unknown policies. */
+ if (policy != MPPE_ENC_POL_ENC_ALLOWED ||
+ policy != MPPE_ENC_POL_ENC_REQUIRED)
+ return;
+
+ /* Don't modify MPPE if it's optional and wasn't already configured. */
+ if (policy == MPPE_ENC_POL_ENC_ALLOWED && !ccp_wantoptions[0].mppe)
+ return;
+
+ /*
+ * Disable undesirable encryption types. Note that we don't ENABLE
+ * any encryption types, to avoid overriding manual configuration.
+ */
+ switch(types) {
+ case MPPE_ENC_TYPES_RC4_40:
+ ccp_wantoptions[0].mppe &= ~MPPE_OPT_128; /* disable 128-bit */
+ break;
+ case MPPE_ENC_TYPES_RC4_128:
+ ccp_wantoptions[0].mppe &= ~MPPE_OPT_40; /* disable 40-bit */
+ break;
+ default:
+ break;
+ }
+}
+#endif /* MPPE */
#endif /* CHAPMS */
projects / ppp.git / blobdiff