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- markus@cvs.openbsd.org 2002/02/24 16:58:32 

[packet.c]
     make 'cp' unsigned and merge with 'ucp'; ok stevesk@
This commit is contained in:
Ben Lindstrom 2002-02-26 18:04:38 +00:00
parent 021fcd3a36
commit 4a7714a43a
2 changed files with 21 additions and 22 deletions
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5
ChangeLog
View File

@ -32,6 +32,9 @@
- markus@cvs.openbsd.org 2002/02/24 16:57:19
[sftp-client.c]
early close(), missing free; ok stevesk@
- markus@cvs.openbsd.org 2002/02/24 16:58:32
[packet.c]
make 'cp' unsigned and merge with 'ucp'; ok stevesk@
20020225
- (bal) Last AIX patch. Moved aix_usrinfo() outside of do_setuserconext()
@ -7705,4 +7708,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
$Id: ChangeLog,v 1.1882 2002/02/26 18:02:43 mouring Exp $
$Id: ChangeLog,v 1.1883 2002/02/26 18:04:38 mouring Exp $

38
packet.c
View File

@ -37,7 +37,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: packet.c,v 1.88 2002/02/14 23:41:01 markus Exp $");
RCSID("$OpenBSD: packet.c,v 1.89 2002/02/24 16:58:32 markus Exp $");
#include "xmalloc.h"
#include "buffer.h"
@ -365,7 +365,7 @@ packet_put_bignum2(BIGNUM * value)
static void
packet_send1(void)
{
char buf[8], *cp;
u_char buf[8], *cp;
int i, padding, len;
u_int checksum;
u_int32_t rand = 0;
@ -496,9 +496,8 @@ static void
packet_send2(void)
{
static u_int32_t seqnr = 0;
u_char type, *ucp, *macbuf = NULL;
u_char type, *cp, *macbuf = NULL;
u_char padlen, pad;
char *cp;
u_int packet_length = 0;
u_int i, len;
u_int32_t rand = 0;
@ -514,8 +513,8 @@ packet_send2(void)
}
block_size = enc ? enc->block_size : 8;
ucp = buffer_ptr(&outgoing_packet);
type = ucp[5];
cp = buffer_ptr(&outgoing_packet);
type = cp[5];
#ifdef PACKET_DEBUG
fprintf(stderr, "plain: ");
@ -570,9 +569,9 @@ packet_send2(void)
}
/* packet_length includes payload, padding and padding length field */
packet_length = buffer_len(&outgoing_packet) - 4;
ucp = buffer_ptr(&outgoing_packet);
PUT_32BIT(ucp, packet_length);
ucp[4] = padlen;
cp = buffer_ptr(&outgoing_packet);
PUT_32BIT(cp, packet_length);
cp[4] = padlen;
DBG(debug("send: len %d (includes padlen %d)", packet_length+4, padlen));
/* compute MAC over seqnr and packet(length fields, payload, padding) */
@ -709,16 +708,15 @@ static int
packet_read_poll1(void)
{
u_int len, padded_len;
u_char *ucp, type;
char *cp;
u_char *cp, type;
u_int checksum, stored_checksum;
/* Check if input size is less than minimum packet size. */
if (buffer_len(&input) < 4 + 8)
return SSH_MSG_NONE;
/* Get length of incoming packet. */
ucp = buffer_ptr(&input);
len = GET_32BIT(ucp);
cp = buffer_ptr(&input);
len = GET_32BIT(cp);
if (len < 1 + 2 + 2 || len > 256 * 1024)
packet_disconnect("Bad packet length %d.", len);
padded_len = (len + 8) & ~7;
@ -765,8 +763,8 @@ packet_read_poll1(void)
packet_disconnect("packet_read_poll1: len %d != buffer_len %d.",
len, buffer_len(&incoming_packet));
ucp = (u_char *)buffer_ptr(&incoming_packet) + len - 4;
stored_checksum = GET_32BIT(ucp);
cp = (u_char *)buffer_ptr(&incoming_packet) + len - 4;
stored_checksum = GET_32BIT(cp);
if (checksum != stored_checksum)
packet_disconnect("Corrupted check bytes on input.");
buffer_consume_end(&incoming_packet, 4);
@ -788,8 +786,7 @@ packet_read_poll2(u_int32_t *seqnr_p)
static u_int32_t seqnr = 0;
static u_int packet_length = 0;
u_int padlen, need;
u_char *macbuf, *ucp, type;
char *cp;
u_char *macbuf, *cp, type;
int maclen, block_size;
Enc *enc = NULL;
Mac *mac = NULL;
@ -814,8 +811,8 @@ packet_read_poll2(u_int32_t *seqnr_p)
cp = buffer_append_space(&incoming_packet, block_size);
cipher_crypt(&receive_context, cp, buffer_ptr(&input),
block_size);
ucp = buffer_ptr(&incoming_packet);
packet_length = GET_32BIT(ucp);
cp = buffer_ptr(&incoming_packet);
packet_length = GET_32BIT(cp);
if (packet_length < 1 + 4 || packet_length > 256 * 1024) {
buffer_dump(&incoming_packet);
packet_disconnect("Bad packet length %d.", packet_length);
@ -863,8 +860,7 @@ packet_read_poll2(u_int32_t *seqnr_p)
/* get padlen */
cp = buffer_ptr(&incoming_packet);
cp += 4;
padlen = (u_char) *cp;
padlen = cp[4];
DBG(debug("input: padlen %d", padlen));
if (padlen < 4)
packet_disconnect("Corrupted padlen %d on input.", padlen);