auto import from //depot/cupcake/@135843

1 files changed, 0 insertions, 240 deletions

diff --git a/random.c b/random.c
deleted file mode 100644
index f1475ed..0000000
--- a/random.c
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Dropbear - a SSH2 server
- * 
- * Copyright (c) 2002,2003 Matt Johnston
- * All rights reserved.
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE. */
-
-#include "includes.h"
-#include "buffer.h"
-#include "dbutil.h"
-#include "bignum.h"
-
-static int donerandinit = 0;
-
-/* this is used to generate unique output from the same hashpool */
-static uint32_t counter = 0;
-/* the max value for the counter, so it won't integer overflow */
-#define MAX_COUNTER 1<<30 
-
-static unsigned char hashpool[SHA1_HASH_SIZE];
-
-#define INIT_SEED_SIZE 32 /* 256 bits */
-
-static void readrand(unsigned char* buf, unsigned int buflen);
-
-/* The basic setup is we read some data from /dev/(u)random or prngd and hash it
- * into hashpool. To read data, we hash together current hashpool contents,
- * and a counter. We feed more data in by hashing the current pool and new
- * data into the pool.
- *
- * It is important to ensure that counter doesn't wrap around before we
- * feed in new entropy.
- *
- */
-
-static void readrand(unsigned char* buf, unsigned int buflen) {
-
-	static int already_blocked = 0;
-	int readfd;
-	unsigned int readpos;
-	int readlen;
-#ifdef DROPBEAR_PRNGD_SOCKET
-	struct sockaddr_un egdsock;
-	char egdcmd[2];
-#endif
-
-#ifdef DROPBEAR_RANDOM_DEV
-	readfd = open(DROPBEAR_RANDOM_DEV, O_RDONLY);
-	if (readfd < 0) {
-		dropbear_exit("couldn't open random device");
-	}
-#endif
-
-#ifdef DROPBEAR_PRNGD_SOCKET
-	memset((void*)&egdsock, 0x0, sizeof(egdsock));
-	egdsock.sun_family = AF_UNIX;
-	strlcpy(egdsock.sun_path, DROPBEAR_PRNGD_SOCKET,
-			sizeof(egdsock.sun_path));
-
-	readfd = socket(PF_UNIX, SOCK_STREAM, 0);
-	if (readfd < 0) {
-		dropbear_exit("couldn't open random device");
-	}
-	/* todo - try various common locations */
-	if (connect(readfd, (struct sockaddr*)&egdsock, 
-			sizeof(struct sockaddr_un)) < 0) {
-		dropbear_exit("couldn't open random device");
-	}
-
-	if (buflen > 255)
-		dropbear_exit("can't request more than 255 bytes from egd");
-	egdcmd[0] = 0x02;	/* blocking read */
-	egdcmd[1] = (unsigned char)buflen;
-	if (write(readfd, egdcmd, 2) < 0)
-		dropbear_exit("can't send command to egd");
-#endif
-
-	/* read the actual random data */
-	readpos = 0;
-	do {
-		if (!already_blocked)
-		{
-			int ret;
-			struct timeval timeout;
-			fd_set read_fds;
-
-			timeout.tv_sec = 2; /* two seconds should be enough */
-			timeout.tv_usec = 0;
-
-			FD_ZERO(&read_fds);
-			FD_SET(readfd, &read_fds);
-			ret = select(readfd + 1, &read_fds, NULL, NULL, &timeout);
-			if (ret == 0)
-			{
-				dropbear_log(LOG_INFO, "Warning: Reading the random source seems to have blocked.\nIf you experience problems, you probably need to find a better entropy source.");
-				already_blocked = 1;
-			}
-		}
-		readlen = read(readfd, &buf[readpos], buflen - readpos);
-		if (readlen <= 0) {
-			if (readlen < 0 && errno == EINTR) {
-				continue;
-			}
-			dropbear_exit("error reading random source");
-		}
-		readpos += readlen;
-	} while (readpos < buflen);
-
-	close (readfd);
-}
-
-/* initialise the prng from /dev/(u)random or prngd */
-void seedrandom() {
-		
-	unsigned char readbuf[INIT_SEED_SIZE];
-
-	hash_state hs;
-
-	/* initialise so that things won't warn about
-	 * hashing an undefined buffer */
-	if (!donerandinit) {
-		m_burn(hashpool, sizeof(hashpool));
-	}
-
-	/* get the seed data */
-	readrand(readbuf, sizeof(readbuf));
-
-	/* hash in the new seed data */
-	sha1_init(&hs);
-	sha1_process(&hs, (void*)hashpool, sizeof(hashpool));
-	sha1_process(&hs, (void*)readbuf, sizeof(readbuf));
-	sha1_done(&hs, hashpool);
-
-	counter = 0;
-	donerandinit = 1;
-}
-
-/* hash the current random pool with some unique identifiers
- * for this process and point-in-time. this is used to separate
- * the random pools for fork()ed processes. */
-void reseedrandom() {
-
-	pid_t pid;
-	hash_state hs;
-	struct timeval tv;
-
-	if (!donerandinit) {
-		dropbear_exit("seedrandom not done");
-	}
-
-	pid = getpid();
-	gettimeofday(&tv, NULL);
-
-	sha1_init(&hs);
-	sha1_process(&hs, (void*)hashpool, sizeof(hashpool));
-	sha1_process(&hs, (void*)&pid, sizeof(pid));
-	sha1_process(&hs, (void*)&tv, sizeof(tv));
-	sha1_done(&hs, hashpool);
-}
-
-/* return len bytes of pseudo-random data */
-void genrandom(unsigned char* buf, unsigned int len) {
-
-	hash_state hs;
-	unsigned char hash[SHA1_HASH_SIZE];
-	unsigned int copylen;
-
-	if (!donerandinit) {
-		dropbear_exit("seedrandom not done");
-	}
-
-	while (len > 0) {
-		sha1_init(&hs);
-		sha1_process(&hs, (void*)hashpool, sizeof(hashpool));
-		sha1_process(&hs, (void*)&counter, sizeof(counter));
-		sha1_done(&hs, hash);
-
-		counter++;
-		if (counter > MAX_COUNTER) {
-			seedrandom();
-		}
-
-		copylen = MIN(len, SHA1_HASH_SIZE);
-		memcpy(buf, hash, copylen);
-		len -= copylen;
-		buf += copylen;
-	}
-	m_burn(hash, sizeof(hash));
-}
-
-/* Generates a random mp_int. 
- * max is a *mp_int specifying an upper bound.
- * rand must be an initialised *mp_int for the result.
- * the result rand satisfies:  0 < rand < max 
- * */
-void gen_random_mpint(mp_int *max, mp_int *rand) {
-
-	unsigned char *randbuf = NULL;
-	unsigned int len = 0;
-	const unsigned char masks[] = {0xff, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f};
-
-	const int size_bits = mp_count_bits(max);
-
-	len = size_bits / 8;
-	if ((size_bits % 8) != 0) {
-		len += 1;
-	}
-
-	randbuf = (unsigned char*)m_malloc(len);
-	do {
-		genrandom(randbuf, len);
-		/* Mask out the unrequired bits - mp_read_unsigned_bin expects
-		 * MSB first.*/
-		randbuf[0] &= masks[size_bits % 8];
-
-		bytes_to_mp(rand, randbuf, len);
-
-		/* keep regenerating until we get one satisfying
-		 * 0 < rand < max    */
-	} while (mp_cmp(rand, max) != MP_LT);
-	m_burn(randbuf, len);
-	m_free(randbuf);
-}