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-rw-r--r--secure/lib/libtelnet/enc_des.c724
1 files changed, 0 insertions, 724 deletions
diff --git a/secure/lib/libtelnet/enc_des.c b/secure/lib/libtelnet/enc_des.c
deleted file mode 100644
index d6886fd..0000000
--- a/secure/lib/libtelnet/enc_des.c
+++ /dev/null
@@ -1,724 +0,0 @@
-/*-
- * Copyright (c) 1991, 1993
- * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND 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 REGENTS OR 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.
- */
-
-#ifndef lint
-static char sccsid[] = "@(#)enc_des.c 8.3 (Berkeley) 5/30/95";
-#endif /* not lint */
-
-#ifdef ENCRYPTION
-# ifdef AUTHENTICATION
-# ifdef DES_ENCRYPTION
-#include <arpa/telnet.h>
-#include <stdio.h>
-#ifdef __STDC__
-#include <stdlib.h>
-#endif
-
-#include "encrypt.h"
-#include "key-proto.h"
-#include "misc-proto.h"
-
-extern encrypt_debug_mode;
-
-#define CFB 0
-#define OFB 1
-
-#define NO_SEND_IV 1
-#define NO_RECV_IV 2
-#define NO_KEYID 4
-#define IN_PROGRESS (NO_SEND_IV|NO_RECV_IV|NO_KEYID)
-#define SUCCESS 0
-#define FAILED -1
-
-
-struct fb {
- Block krbdes_key;
- Schedule krbdes_sched;
- Block temp_feed;
- unsigned char fb_feed[64];
- int need_start;
- int state[2];
- int keyid[2];
- int once;
- struct stinfo {
- Block str_output;
- Block str_feed;
- Block str_iv;
- Block str_ikey;
- Schedule str_sched;
- int str_index;
- int str_flagshift;
- } streams[2];
-};
-
-static struct fb fb[2];
-
-struct keyidlist {
- char *keyid;
- int keyidlen;
- char *key;
- int keylen;
- int flags;
-} keyidlist [] = {
- { "\0", 1, 0, 0, 0 }, /* default key of zero */
- { 0, 0, 0, 0, 0 }
-};
-
-#define KEYFLAG_MASK 03
-
-#define KEYFLAG_NOINIT 00
-#define KEYFLAG_INIT 01
-#define KEYFLAG_OK 02
-#define KEYFLAG_BAD 03
-
-#define KEYFLAG_SHIFT 2
-
-#define SHIFT_VAL(a,b) (KEYFLAG_SHIFT*((a)+((b)*2)))
-
-#define FB64_IV 1
-#define FB64_IV_OK 2
-#define FB64_IV_BAD 3
-
-
-void fb64_stream_iv P((Block, struct stinfo *));
-void fb64_init P((struct fb *));
-static int fb64_start P((struct fb *, int, int));
-int fb64_is P((unsigned char *, int, struct fb *));
-int fb64_reply P((unsigned char *, int, struct fb *));
-static void fb64_session P((Session_Key *, int, struct fb *));
-void fb64_stream_key P((Block, struct stinfo *));
-int fb64_keyid P((int, unsigned char *, int *, struct fb *));
-
- void
-cfb64_init(server)
- int server;
-{
- fb64_init(&fb[CFB]);
- fb[CFB].fb_feed[4] = ENCTYPE_DES_CFB64;
- fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, CFB);
- fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, CFB);
-}
-
- void
-ofb64_init(server)
- int server;
-{
- fb64_init(&fb[OFB]);
- fb[OFB].fb_feed[4] = ENCTYPE_DES_OFB64;
- fb[CFB].streams[0].str_flagshift = SHIFT_VAL(0, OFB);
- fb[CFB].streams[1].str_flagshift = SHIFT_VAL(1, OFB);
-}
-
- void
-fb64_init(fbp)
- register struct fb *fbp;
-{
- memset((void *)fbp, 0, sizeof(*fbp));
- fbp->state[0] = fbp->state[1] = FAILED;
- fbp->fb_feed[0] = IAC;
- fbp->fb_feed[1] = SB;
- fbp->fb_feed[2] = TELOPT_ENCRYPT;
- fbp->fb_feed[3] = ENCRYPT_IS;
-}
-
-/*
- * Returns:
- * -1: some error. Negotiation is done, encryption not ready.
- * 0: Successful, initial negotiation all done.
- * 1: successful, negotiation not done yet.
- * 2: Not yet. Other things (like getting the key from
- * Kerberos) have to happen before we can continue.
- */
- int
-cfb64_start(dir, server)
- int dir;
- int server;
-{
- return(fb64_start(&fb[CFB], dir, server));
-}
- int
-ofb64_start(dir, server)
- int dir;
- int server;
-{
- return(fb64_start(&fb[OFB], dir, server));
-}
-
- static int
-fb64_start(fbp, dir, server)
- struct fb *fbp;
- int dir;
- int server;
-{
- Block b;
- int x;
- unsigned char *p;
- register int state;
-
- switch (dir) {
- case DIR_DECRYPT:
- /*
- * This is simply a request to have the other side
- * start output (our input). He will negotiate an
- * IV so we need not look for it.
- */
- state = fbp->state[dir-1];
- if (state == FAILED)
- state = IN_PROGRESS;
- break;
-
- case DIR_ENCRYPT:
- state = fbp->state[dir-1];
- if (state == FAILED)
- state = IN_PROGRESS;
- else if ((state & NO_SEND_IV) == 0)
- break;
-
- if (!VALIDKEY(fbp->krbdes_key)) {
- fbp->need_start = 1;
- break;
- }
- state &= ~NO_SEND_IV;
- state |= NO_RECV_IV;
- if (encrypt_debug_mode)
- printf("Creating new feed\r\n");
- /*
- * Create a random feed and send it over.
- */
- des_new_random_key(fbp->temp_feed);
- des_ecb_encrypt(fbp->temp_feed, fbp->temp_feed,
- fbp->krbdes_sched, 1);
- p = fbp->fb_feed + 3;
- *p++ = ENCRYPT_IS;
- p++;
- *p++ = FB64_IV;
- for (x = 0; x < sizeof(Block); ++x) {
- if ((*p++ = fbp->temp_feed[x]) == IAC)
- *p++ = IAC;
- }
- *p++ = IAC;
- *p++ = SE;
- printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
- net_write(fbp->fb_feed, p - fbp->fb_feed);
- break;
- default:
- return(FAILED);
- }
- return(fbp->state[dir-1] = state);
-}
-
-/*
- * Returns:
- * -1: some error. Negotiation is done, encryption not ready.
- * 0: Successful, initial negotiation all done.
- * 1: successful, negotiation not done yet.
- */
- int
-cfb64_is(data, cnt)
- unsigned char *data;
- int cnt;
-{
- return(fb64_is(data, cnt, &fb[CFB]));
-}
- int
-ofb64_is(data, cnt)
- unsigned char *data;
- int cnt;
-{
- return(fb64_is(data, cnt, &fb[OFB]));
-}
-
- int
-fb64_is(data, cnt, fbp)
- unsigned char *data;
- int cnt;
- struct fb *fbp;
-{
- int x;
- unsigned char *p;
- Block b;
- register int state = fbp->state[DIR_DECRYPT-1];
-
- if (cnt-- < 1)
- goto failure;
-
- switch (*data++) {
- case FB64_IV:
- if (cnt != sizeof(Block)) {
- if (encrypt_debug_mode)
- printf("CFB64: initial vector failed on size\r\n");
- state = FAILED;
- goto failure;
- }
-
- if (encrypt_debug_mode)
- printf("CFB64: initial vector received\r\n");
-
- if (encrypt_debug_mode)
- printf("Initializing Decrypt stream\r\n");
-
- fb64_stream_iv((void *)data, &fbp->streams[DIR_DECRYPT-1]);
-
- p = fbp->fb_feed + 3;
- *p++ = ENCRYPT_REPLY;
- p++;
- *p++ = FB64_IV_OK;
- *p++ = IAC;
- *p++ = SE;
- printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
- net_write(fbp->fb_feed, p - fbp->fb_feed);
-
- state = fbp->state[DIR_DECRYPT-1] = IN_PROGRESS;
- break;
-
- default:
- if (encrypt_debug_mode) {
- printf("Unknown option type: %d\r\n", *(data-1));
- printd(data, cnt);
- printf("\r\n");
- }
- /* FALL THROUGH */
- failure:
- /*
- * We failed. Send an FB64_IV_BAD option
- * to the other side so it will know that
- * things failed.
- */
- p = fbp->fb_feed + 3;
- *p++ = ENCRYPT_REPLY;
- p++;
- *p++ = FB64_IV_BAD;
- *p++ = IAC;
- *p++ = SE;
- printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
- net_write(fbp->fb_feed, p - fbp->fb_feed);
-
- break;
- }
- return(fbp->state[DIR_DECRYPT-1] = state);
-}
-
-/*
- * Returns:
- * -1: some error. Negotiation is done, encryption not ready.
- * 0: Successful, initial negotiation all done.
- * 1: successful, negotiation not done yet.
- */
- int
-cfb64_reply(data, cnt)
- unsigned char *data;
- int cnt;
-{
- return(fb64_reply(data, cnt, &fb[CFB]));
-}
- int
-ofb64_reply(data, cnt)
- unsigned char *data;
- int cnt;
-{
- return(fb64_reply(data, cnt, &fb[OFB]));
-}
-
-
- int
-fb64_reply(data, cnt, fbp)
- unsigned char *data;
- int cnt;
- struct fb *fbp;
-{
- int x;
- unsigned char *p;
- Block b;
- register int state = fbp->state[DIR_ENCRYPT-1];
-
- if (cnt-- < 1)
- goto failure;
-
- switch (*data++) {
- case FB64_IV_OK:
- fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);
- if (state == FAILED)
- state = IN_PROGRESS;
- state &= ~NO_RECV_IV;
- encrypt_send_keyid(DIR_ENCRYPT, (unsigned char *)"\0", 1, 1);
- break;
-
- case FB64_IV_BAD:
- memset(fbp->temp_feed, 0, sizeof(Block));
- fb64_stream_iv(fbp->temp_feed, &fbp->streams[DIR_ENCRYPT-1]);
- state = FAILED;
- break;
-
- default:
- if (encrypt_debug_mode) {
- printf("Unknown option type: %d\r\n", data[-1]);
- printd(data, cnt);
- printf("\r\n");
- }
- /* FALL THROUGH */
- failure:
- state = FAILED;
- break;
- }
- return(fbp->state[DIR_ENCRYPT-1] = state);
-}
-
- void
-cfb64_session(key, server)
- Session_Key *key;
- int server;
-{
- fb64_session(key, server, &fb[CFB]);
-}
-
- void
-ofb64_session(key, server)
- Session_Key *key;
- int server;
-{
- fb64_session(key, server, &fb[OFB]);
-}
-
- static void
-fb64_session(key, server, fbp)
- Session_Key *key;
- int server;
- struct fb *fbp;
-{
-
- if (!key || key->type != SK_DES) {
- if (encrypt_debug_mode)
- printf("Can't set krbdes's session key (%d != %d)\r\n",
- key ? key->type : -1, SK_DES);
- return;
- }
- memmove((void *)fbp->krbdes_key, (void *)key->data, sizeof(Block));
-
- fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_ENCRYPT-1]);
- fb64_stream_key(fbp->krbdes_key, &fbp->streams[DIR_DECRYPT-1]);
-
- if (fbp->once == 0) {
- des_set_random_generator_seed(fbp->krbdes_key);
- fbp->once = 1;
- }
- des_key_sched(fbp->krbdes_key, fbp->krbdes_sched);
- /*
- * Now look to see if krbdes_start() was was waiting for
- * the key to show up. If so, go ahead an call it now
- * that we have the key.
- */
- if (fbp->need_start) {
- fbp->need_start = 0;
- fb64_start(fbp, DIR_ENCRYPT, server);
- }
-}
-
-/*
- * We only accept a keyid of 0. If we get a keyid of
- * 0, then mark the state as SUCCESS.
- */
- int
-cfb64_keyid(dir, kp, lenp)
- int dir, *lenp;
- unsigned char *kp;
-{
- return(fb64_keyid(dir, kp, lenp, &fb[CFB]));
-}
-
- int
-ofb64_keyid(dir, kp, lenp)
- int dir, *lenp;
- unsigned char *kp;
-{
- return(fb64_keyid(dir, kp, lenp, &fb[OFB]));
-}
-
- int
-fb64_keyid(dir, kp, lenp, fbp)
- int dir, *lenp;
- unsigned char *kp;
- struct fb *fbp;
-{
- register int state = fbp->state[dir-1];
-
- if (*lenp != 1 || (*kp != '\0')) {
- *lenp = 0;
- return(state);
- }
-
- if (state == FAILED)
- state = IN_PROGRESS;
-
- state &= ~NO_KEYID;
-
- return(fbp->state[dir-1] = state);
-}
-
- void
-fb64_printsub(data, cnt, buf, buflen, type)
- unsigned char *data, *buf, *type;
- int cnt, buflen;
-{
- char lbuf[32];
- register int i;
- char *cp;
-
- buf[buflen-1] = '\0'; /* make sure it's NULL terminated */
- buflen -= 1;
-
- switch(data[2]) {
- case FB64_IV:
- sprintf(lbuf, "%s_IV", type);
- cp = lbuf;
- goto common;
-
- case FB64_IV_OK:
- sprintf(lbuf, "%s_IV_OK", type);
- cp = lbuf;
- goto common;
-
- case FB64_IV_BAD:
- sprintf(lbuf, "%s_IV_BAD", type);
- cp = lbuf;
- goto common;
-
- default:
- sprintf(lbuf, " %d (unknown)", data[2]);
- cp = lbuf;
- common:
- for (; (buflen > 0) && (*buf = *cp++); buf++)
- buflen--;
- for (i = 3; i < cnt; i++) {
- sprintf(lbuf, " %d", data[i]);
- for (cp = lbuf; (buflen > 0) && (*buf = *cp++); buf++)
- buflen--;
- }
- break;
- }
-}
-
- void
-cfb64_printsub(data, cnt, buf, buflen)
- unsigned char *data, *buf;
- int cnt, buflen;
-{
- fb64_printsub(data, cnt, buf, buflen, "CFB64");
-}
-
- void
-ofb64_printsub(data, cnt, buf, buflen)
- unsigned char *data, *buf;
- int cnt, buflen;
-{
- fb64_printsub(data, cnt, buf, buflen, "OFB64");
-}
-
- void
-fb64_stream_iv(seed, stp)
- Block seed;
- register struct stinfo *stp;
-{
-
- memmove((void *)stp->str_iv, (void *)seed, sizeof(Block));
- memmove((void *)stp->str_output, (void *)seed, sizeof(Block));
-
- des_key_sched(stp->str_ikey, stp->str_sched);
-
- stp->str_index = sizeof(Block);
-}
-
- void
-fb64_stream_key(key, stp)
- Block key;
- register struct stinfo *stp;
-{
- memmove((void *)stp->str_ikey, (void *)key, sizeof(Block));
- des_key_sched(key, stp->str_sched);
-
- memmove((void *)stp->str_output, (void *)stp->str_iv, sizeof(Block));
-
- stp->str_index = sizeof(Block);
-}
-
-/*
- * DES 64 bit Cipher Feedback
- *
- * key --->+-----+
- * +->| DES |--+
- * | +-----+ |
- * | v
- * INPUT --(--------->(+)+---> DATA
- * | |
- * +-------------+
- *
- *
- * Given:
- * iV: Initial vector, 64 bits (8 bytes) long.
- * Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt).
- * On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output.
- *
- * V0 = DES(iV, key)
- * On = Dn ^ Vn
- * V(n+1) = DES(On, key)
- */
-
- void
-cfb64_encrypt(s, c)
- register unsigned char *s;
- int c;
-{
- register struct stinfo *stp = &fb[CFB].streams[DIR_ENCRYPT-1];
- register int index;
-
- index = stp->str_index;
- while (c-- > 0) {
- if (index == sizeof(Block)) {
- Block b;
- des_ecb_encrypt(stp->str_output, b, stp->str_sched, 1);
- memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
- index = 0;
- }
-
- /* On encryption, we store (feed ^ data) which is cypher */
- *s = stp->str_output[index] = (stp->str_feed[index] ^ *s);
- s++;
- index++;
- }
- stp->str_index = index;
-}
-
- int
-cfb64_decrypt(data)
- int data;
-{
- register struct stinfo *stp = &fb[CFB].streams[DIR_DECRYPT-1];
- int index;
-
- if (data == -1) {
- /*
- * Back up one byte. It is assumed that we will
- * never back up more than one byte. If we do, this
- * may or may not work.
- */
- if (stp->str_index)
- --stp->str_index;
- return(0);
- }
-
- index = stp->str_index++;
- if (index == sizeof(Block)) {
- Block b;
- des_ecb_encrypt(stp->str_output, b, stp->str_sched, 1);
- memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
- stp->str_index = 1; /* Next time will be 1 */
- index = 0; /* But now use 0 */
- }
-
- /* On decryption we store (data) which is cypher. */
- stp->str_output[index] = data;
- return(data ^ stp->str_feed[index]);
-}
-
-/*
- * DES 64 bit Output Feedback
- *
- * key --->+-----+
- * +->| DES |--+
- * | +-----+ |
- * +-----------+
- * v
- * INPUT -------->(+) ----> DATA
- *
- * Given:
- * iV: Initial vector, 64 bits (8 bytes) long.
- * Dn: the nth chunk of 64 bits (8 bytes) of data to encrypt (decrypt).
- * On: the nth chunk of 64 bits (8 bytes) of encrypted (decrypted) output.
- *
- * V0 = DES(iV, key)
- * V(n+1) = DES(Vn, key)
- * On = Dn ^ Vn
- */
- void
-ofb64_encrypt(s, c)
- register unsigned char *s;
- int c;
-{
- register struct stinfo *stp = &fb[OFB].streams[DIR_ENCRYPT-1];
- register int index;
-
- index = stp->str_index;
- while (c-- > 0) {
- if (index == sizeof(Block)) {
- Block b;
- des_ecb_encrypt(stp->str_feed, b, stp->str_sched, 1);
- memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
- index = 0;
- }
- *s++ ^= stp->str_feed[index];
- index++;
- }
- stp->str_index = index;
-}
-
- int
-ofb64_decrypt(data)
- int data;
-{
- register struct stinfo *stp = &fb[OFB].streams[DIR_DECRYPT-1];
- int index;
-
- if (data == -1) {
- /*
- * Back up one byte. It is assumed that we will
- * never back up more than one byte. If we do, this
- * may or may not work.
- */
- if (stp->str_index)
- --stp->str_index;
- return(0);
- }
-
- index = stp->str_index++;
- if (index == sizeof(Block)) {
- Block b;
- des_ecb_encrypt(stp->str_feed, b, stp->str_sched, 1);
- memmove((void *)stp->str_feed, (void *)b, sizeof(Block));
- stp->str_index = 1; /* Next time will be 1 */
- index = 0; /* But now use 0 */
- }
-
- return(data ^ stp->str_feed[index]);
-}
-# endif /* DES_ENCRYPTION */
-# endif /* AUTHENTICATION */
-#endif /* ENCRYPTION */
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