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authormarkm <markm@FreeBSD.org>1996-02-10 15:32:26 +0000
committermarkm <markm@FreeBSD.org>1996-02-10 15:32:26 +0000
commit654d7208400d25aabc0fc7b11afc12a7e70422f5 (patch)
treefcdabbbb34bce086cdef990d5d8f47034e0955f5 /secure/lib/libdes/new_rkey.c
parent61b9823c67c9735258dbd79503b0b07d403241c2 (diff)
parentac425672272c2be2c8ff171a3ae8851e8219740f (diff)
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+/* lib/des/new_rkey.c */
+/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au)
+ * All rights reserved.
+ *
+ * This file is part of an SSL implementation written
+ * by Eric Young (eay@mincom.oz.au).
+ * The implementation was written so as to conform with Netscapes SSL
+ * specification. This library and applications are
+ * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
+ * as long as the following conditions are aheared to.
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed. If this code is used in a product,
+ * Eric Young should be given attribution as the author of the parts used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * 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 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 Eric Young (eay@mincom.oz.au)
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+/*
+ * Copyright (c) 1995
+ * Mark Murray. 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 Mark Murray
+ * and Eric Young
+ * 4. Neither the name of the author nor the names of any co-contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY MARK MURRAY 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.
+ *
+ * $Id: new_rnd_key.c,v 1.1 1995/09/16 21:01:51 mark Exp $
+ */
+
+/* 21-Nov-95 - eay - I've finally put this into libdes, I have made a
+ * few changes since it need to compile on all version of unix and
+ * there were a few things that would not :-) */
+
+#incldue <stdio.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <machine/types.h>
+
+#include "des_locl.h"
+
+/* This counter keeps track of the pseudo-random sequence */
+static union {
+ unsigned long ul0, ul1;
+ unsigned char uc[8];
+} counter;
+
+/* The current encryption schedule */
+static des_key_schedule current_key;
+
+/*
+ * des_set_random_generator_seed: starts a new pseudorandom sequence
+ * dependant on the supplied key
+ */
+void
+des_set_random_generator_seed(new_key)
+ des_cblock *new_key;
+{
+ des_key_sched(new_key, current_key);
+
+ /* reset the counter */
+ counter.ul0 = counter.ul1 = 0;
+}
+
+/*
+ * des_set_sequence_number: set the counter to a known value
+ */
+void
+des_set_sequence_number(new_counter)
+ des_cblock new_counter;
+{
+ memcpy((char *)counter.uc,(char *)new_counter,sizeof(counter));
+}
+
+/*
+ * des_generate_random_block: returns the next 64 bit random number
+ */
+
+void des_generate_random_block(random_block)
+ des_cblock *random_block;
+{
+ /* Encrypt the counter to get pseudo-random numbers */
+ des_ecb_encrypt(&counter.uc, random_block, current_key, DES_ENCRYPT);
+
+ /* increment the 64-bit counter
+ * (or that could be a 128 bit counter on a 64 bit box - eay */
+ if (!++counter.ul0) counter.ul1++;
+}
+
+/*
+ * des_new_random_key: Invents a new, random strong key with odd parity.
+ */
+int
+des_new_random_key(new_key)
+ des_cblock *new_key;
+{
+ do {
+ des_generate_random_block(new_key);
+ des_set_odd_parity(new_key);
+ } while (des_is_weak_key(new_key));
+ return(0);
+}
+
+/*
+ * des_init_random_number_generator: intialises the random number generator
+ * to a truly nasty sequence using system
+ * supplied volatile variables.
+ */
+void
+des_init_random_number_generator(key)
+ des_cblock *key;
+{
+ /* 64-bit structures */
+ struct {
+ u_int32_t pid;
+ u_int32_t hostid;
+ } sysblock;
+ struct timeval timeblock;
+ struct {
+ u_int32_t tv_sec;
+ u_int32_t tv_usec;
+ } time64bit;
+ des_cblock new_key;
+ int mib[2];
+ size_t len;
+
+ /* Get host ID using official BSD 4.4 method */
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_HOSTID;
+ len = sizeof(sysblock.hostid);
+ sysctl(mib, 2, &sysblock.hostid, &len, NULL, 0);
+
+ /* Get Process ID */
+ sysblock.pid = getpid();
+
+ /* Generate a new key, and use it to seed the random generator */
+ des_set_random_generator_seed(key);
+ des_set_sequence_number((unsigned char *)&sysblock);
+ des_new_random_key(&new_key);
+ des_set_random_generator_seed(&new_key);
+
+ /* Try to confuse the sequence counter */
+ gettimeofday(&timeblock, NULL);
+ time64bit.tv_sec = (u_int32_t)timeblock.tv_sec;
+ time64bit.tv_usec = (u_int32_t)timeblock.tv_usec;
+ des_set_sequence_number((unsigned char *)&time64bit);
+
+ /* Do the work */
+ des_new_random_key(&new_key);
+ des_set_random_generator_seed(&new_key);
+}
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