Windows/NT integration (V1_0_WIN32_BRANCH merge)

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@9788 dc483132-0cff-0310-8789-dd5450dbe970

1 files changed, 725 insertions, 0 deletions

diff --git a/src/windows/wintel/enc_des.c b/src/windows/wintel/enc_des.c
new file mode 100644
index 0000000000..8357dba7c1
--- /dev/null
+++ b/src/windows/wintel/enc_des.c
@@ -0,0 +1,725 @@
+/*-
+ * 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.
+ */
+
+/* based on @(#)enc_des.c	8.1 (Berkeley) 6/4/93 */
+
+#ifdef ENCRYPTION
+
+#include "telnet_arpa.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "telnet.h"
+
+#include "encrypt.h"
+
+#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	xFAILED		-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
+
+extern kstream EncryptKSGlobalHack;
+
+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] = xFAILED;
+	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;
+{
+	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 == xFAILED)
+			state = IN_PROGRESS;
+		break;
+
+	case DIR_ENCRYPT:
+		state = fbp->state[dir-1];
+		if (state == xFAILED)
+			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;
+		/*
+		 * 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;
+#ifdef DEBUG
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+#endif
+		TelnetSend(EncryptKSGlobalHack, fbp->fb_feed, p - fbp->fb_feed, 0);
+		break;
+	default:
+		return(xFAILED);
+	}
+	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;
+{
+	unsigned char *p;
+	register int state = fbp->state[DIR_DECRYPT-1];
+
+	if (cnt-- < 1)
+		goto failure;
+
+	switch (*data++) {
+	case FB64_IV:
+		if (cnt != sizeof(Block)) {
+#ifdef DEBUG
+			if (encrypt_debug_mode)
+				printf("CFB64: initial vector failed on size\r\n");
+#endif
+			state = xFAILED;
+			goto failure;
+		}
+
+#ifdef DEBUG
+		if (encrypt_debug_mode) {
+			printf("CFB64: initial vector received\r\n");
+			printf("Initializing Decrypt stream\r\n");
+		}
+#endif
+		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;
+#ifdef DEBUG
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+#endif
+		TelnetSend(EncryptKSGlobalHack, fbp->fb_feed, p - fbp->fb_feed, 0);
+
+		state = fbp->state[DIR_DECRYPT-1] = IN_PROGRESS;
+		break;
+
+	default:
+#if 0
+		if (encrypt_debug_mode) {
+			printf("Unknown option type: %d\r\n", *(data-1));
+			printd(data, cnt);
+			printf("\r\n");
+		}
+#endif
+		/* 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;
+#ifdef DEBUG
+		printsub('>', &fbp->fb_feed[2], p - &fbp->fb_feed[2]);
+#endif
+		TelnetSend(EncryptKSGlobalHack, fbp->fb_feed, p - fbp->fb_feed, 0);
+
+		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;
+{
+	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 == xFAILED)
+			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 = xFAILED;
+		break;
+
+	default:
+#if 0
+		if (encrypt_debug_mode) {
+			printf("Unknown option type: %d\r\n", data[-1]);
+			printd(data, cnt);
+			printf("\r\n");
+		}
+#endif
+		/* FALL THROUGH */
+	failure:
+		state = xFAILED;
+		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) {
+#ifdef DEBUG
+		if (encrypt_debug_mode)
+			printf("Can't set krbdes's session key (%d != %d)\r\n",
+				key ? key->type : -1, SK_DES);
+#endif
+		return;
+	}
+	memcpy((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 == xFAILED)
+		state = IN_PROGRESS;
+
+	state &= ~NO_KEYID;
+
+	return(fbp->state[dir-1] = state);
+}
+
+#if 0
+	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");
+}
+#endif
+
+	void
+fb64_stream_iv(seed, stp)
+	Block seed;
+	register struct stinfo *stp;
+{
+
+	memcpy((void *)stp->str_iv,     (void *)seed, sizeof(Block));
+	memcpy((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;
+{
+	memcpy((void *)stp->str_ikey, (void *)key, sizeof(Block));
+	des_key_sched(key, stp->str_sched);
+
+	memcpy((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);
+			memcpy((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);
+		memcpy((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);
+			memcpy((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);
+		memcpy((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 /* ENCRYPTION */