mppe.c (3285bb3c97fb88cd6e19ff479ac6f37d471c8bac) mppe.c (057f1760a8171825b260dad27502f74ed5f69faf)
1/*-
2 * Copyright (c) 2000 Semen Ustimenko <semenu@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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93#define MPPE_HEADER_FLAGSHIFT 8
94#define MPPE_HEADER_STATEFUL_KEYCHANGES 16
95
96struct mppe_state {
97 unsigned stateless : 1;
98 unsigned flushnext : 1;
99 unsigned flushrequired : 1;
100 int cohnum;
1/*-
2 * Copyright (c) 2000 Semen Ustimenko <semenu@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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93#define MPPE_HEADER_FLAGSHIFT 8
94#define MPPE_HEADER_STATEFUL_KEYCHANGES 16
95
96struct mppe_state {
97 unsigned stateless : 1;
98 unsigned flushnext : 1;
99 unsigned flushrequired : 1;
100 int cohnum;
101 int keylen; /* 8 or 16 bytes */
101 unsigned keylen; /* 8 or 16 bytes */
102 int keybits; /* 40, 56 or 128 bits */
103 char sesskey[MPPE_KEY_LEN];
104 char mastkey[MPPE_KEY_LEN];
105 RC4_KEY rc4key;
106};
107
108int MPPE_MasterKeyValid = 0;
109int MPPE_IsServer = 0;

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150 GetNewKeyFromSHA(mp->mastkey, mp->sesskey, mp->keylen, InterimKey);
151 RC4_set_key(&RC4Key, mp->keylen, InterimKey);
152 RC4(&RC4Key, mp->keylen, InterimKey, mp->sesskey);
153
154 MPPEReduceSessionKey(mp);
155}
156
157static struct mbuf *
102 int keybits; /* 40, 56 or 128 bits */
103 char sesskey[MPPE_KEY_LEN];
104 char mastkey[MPPE_KEY_LEN];
105 RC4_KEY rc4key;
106};
107
108int MPPE_MasterKeyValid = 0;
109int MPPE_IsServer = 0;

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150 GetNewKeyFromSHA(mp->mastkey, mp->sesskey, mp->keylen, InterimKey);
151 RC4_set_key(&RC4Key, mp->keylen, InterimKey);
152 RC4(&RC4Key, mp->keylen, InterimKey, mp->sesskey);
153
154 MPPEReduceSessionKey(mp);
155}
156
157static struct mbuf *
158MPPEOutput(void *v, struct ccp *ccp, struct link *l, int pri, u_short *proto,
159 struct mbuf *mp)
158MPPEOutput(void *v, struct ccp *ccp, struct link *l __unused, int pri __unused,
159 u_short *proto, struct mbuf *mp)
160{
161 struct mppe_state *mop = (struct mppe_state *)v;
162 struct mbuf *mo;
163 u_short nproto, prefix;
164 int dictinit, ilen, len;
165 char *rp;
166
167 ilen = m_length(mp);

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227
228 log_Printf(LogDEBUG, "MPPE: Output: Encrypted: Proto %02x (%d bytes)\n",
229 *proto, len);
230
231 return mo;
232}
233
234static void
160{
161 struct mppe_state *mop = (struct mppe_state *)v;
162 struct mbuf *mo;
163 u_short nproto, prefix;
164 int dictinit, ilen, len;
165 char *rp;
166
167 ilen = m_length(mp);

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227
228 log_Printf(LogDEBUG, "MPPE: Output: Encrypted: Proto %02x (%d bytes)\n",
229 *proto, len);
230
231 return mo;
232}
233
234static void
235MPPEResetInput(void *v)
235MPPEResetInput(void *v __unused)
236{
237 log_Printf(LogCCP, "MPPE: Unexpected input channel ack\n");
238}
239
240static struct mbuf *
241MPPEInput(void *v, struct ccp *ccp, u_short *proto, struct mbuf *mp)
242{
243 struct mppe_state *mip = (struct mppe_state *)v;

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367 log_DumpBp(LogDEBUG, "MPPEInput: Decrypted: Packet:", mp);
368
369 ccp->uncompin += len;
370
371 return mp;
372}
373
374static void
236{
237 log_Printf(LogCCP, "MPPE: Unexpected input channel ack\n");
238}
239
240static struct mbuf *
241MPPEInput(void *v, struct ccp *ccp, u_short *proto, struct mbuf *mp)
242{
243 struct mppe_state *mip = (struct mppe_state *)v;

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367 log_DumpBp(LogDEBUG, "MPPEInput: Decrypted: Packet:", mp);
368
369 ccp->uncompin += len;
370
371 return mp;
372}
373
374static void
375MPPEDictSetup(void *v, struct ccp *ccp, u_short proto, struct mbuf *mi)
375MPPEDictSetup(void *v __unused, struct ccp *ccp __unused,
376 u_short proto __unused, struct mbuf *mp __unused)
376{
377{
378 /* Nothing to see here */
377}
378
379static const char *
380MPPEDispOpts(struct fsm_opt *o)
381{
382 static char buf[70];
383 u_int32_t val;
384 char ch;

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380
381static const char *
382MPPEDispOpts(struct fsm_opt *o)
383{
384 static char buf[70];
385 u_int32_t val;
386 char ch;

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