-/* $OpenBSD: bufbn.c,v 1.12 2014/04/30 05:29:56 djm Exp $ */
+/* $OpenBSD: bufbn.c,v 1.13 2017/04/30 23:23:54 djm Exp $ */
/*
* Copyright (c) 2012 Damien Miller <djm@mindrot.org>
#include "log.h"
#include "ssherr.h"
-int
-buffer_put_bignum_ret(Buffer *buffer, const BIGNUM *value)
-{
- int ret;
-
- if ((ret = sshbuf_put_bignum1(buffer, value)) != 0) {
- error("%s: %s", __func__, ssh_err(ret));
- return -1;
- }
- return 0;
-}
-
-void
-buffer_put_bignum(Buffer *buffer, const BIGNUM *value)
-{
- if (buffer_put_bignum_ret(buffer, value) == -1)
- fatal("%s: buffer error", __func__);
-}
-
-int
-buffer_get_bignum_ret(Buffer *buffer, BIGNUM *value)
-{
- int ret;
-
- if ((ret = sshbuf_get_bignum1(buffer, value)) != 0) {
- error("%s: %s", __func__, ssh_err(ret));
- return -1;
- }
- return 0;
-}
-
-void
-buffer_get_bignum(Buffer *buffer, BIGNUM *value)
-{
- if (buffer_get_bignum_ret(buffer, value) == -1)
- fatal("%s: buffer error", __func__);
-}
int
buffer_put_bignum2_ret(Buffer *buffer, const BIGNUM *value)
-/* $OpenBSD: buffer.h,v 1.25 2014/04/30 05:29:56 djm Exp $ */
+/* $OpenBSD: buffer.h,v 1.26 2017/04/30 23:23:54 djm Exp $ */
/*
* Copyright (c) 2012 Damien Miller <djm@mindrot.org>
int buffer_consume_ret(Buffer *, u_int);
int buffer_consume_end_ret(Buffer *, u_int);
-void buffer_put_bignum(Buffer *, const BIGNUM *);
void buffer_put_bignum2(Buffer *, const BIGNUM *);
-void buffer_get_bignum(Buffer *, BIGNUM *);
void buffer_get_bignum2(Buffer *, BIGNUM *);
void buffer_put_bignum2_from_string(Buffer *, const u_char *, u_int);
#define buffer_skip_string(b) (void)buffer_get_string_ptr(b, NULL);
-int buffer_put_bignum_ret(Buffer *, const BIGNUM *);
-int buffer_get_bignum_ret(Buffer *, BIGNUM *);
int buffer_put_bignum2_ret(Buffer *, const BIGNUM *);
int buffer_get_bignum2_ret(Buffer *, BIGNUM *);
int buffer_get_short_ret(u_short *, Buffer *);
-/* $OpenBSD: packet.c,v 1.249 2017/04/30 23:13:25 djm Exp $ */
+/* $OpenBSD: packet.c,v 1.250 2017/04/30 23:23:54 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
return 0;
}
-/* Checks if a full packet is available in the data received so far via
- * packet_process_incoming. If so, reads the packet; otherwise returns
- * SSH_MSG_NONE. This does not wait for data from the connection.
- *
- * SSH_MSG_DISCONNECT is handled specially here. Also,
- * SSH_MSG_IGNORE messages are skipped by this function and are never returned
- * to higher levels.
- */
-
-int
-ssh_packet_read_poll1(struct ssh *ssh, u_char *typep)
-{
- struct session_state *state = ssh->state;
- u_int len, padded_len;
- const char *emsg;
- const u_char *cp;
- u_char *p;
- u_int checksum, stored_checksum;
- int r;
-
- *typep = SSH_MSG_NONE;
-
- /* Check if input size is less than minimum packet size. */
- if (sshbuf_len(state->input) < 4 + 8)
- return 0;
- /* Get length of incoming packet. */
- len = PEEK_U32(sshbuf_ptr(state->input));
- if (len < 1 + 2 + 2 || len > 256 * 1024) {
- if ((r = sshpkt_disconnect(ssh, "Bad packet length %u",
- len)) != 0)
- return r;
- return SSH_ERR_CONN_CORRUPT;
- }
- padded_len = (len + 8) & ~7;
-
- /* Check if the packet has been entirely received. */
- if (sshbuf_len(state->input) < 4 + padded_len)
- return 0;
-
- /* The entire packet is in buffer. */
-
- /* Consume packet length. */
- if ((r = sshbuf_consume(state->input, 4)) != 0)
- goto out;
-
- /*
- * Cryptographic attack detector for ssh
- * (C)1998 CORE-SDI, Buenos Aires Argentina
- * Ariel Futoransky(futo@core-sdi.com)
- */
- if (!cipher_ctx_is_plaintext(state->receive_context)) {
- emsg = NULL;
- switch (detect_attack(&state->deattack,
- sshbuf_ptr(state->input), padded_len)) {
- case DEATTACK_OK:
- break;
- case DEATTACK_DETECTED:
- emsg = "crc32 compensation attack detected";
- break;
- case DEATTACK_DOS_DETECTED:
- emsg = "deattack denial of service detected";
- break;
- default:
- emsg = "deattack error";
- break;
- }
- if (emsg != NULL) {
- error("%s", emsg);
- if ((r = sshpkt_disconnect(ssh, "%s", emsg)) != 0 ||
- (r = ssh_packet_write_wait(ssh)) != 0)
- return r;
- return SSH_ERR_CONN_CORRUPT;
- }
- }
-
- /* Decrypt data to incoming_packet. */
- sshbuf_reset(state->incoming_packet);
- if ((r = sshbuf_reserve(state->incoming_packet, padded_len, &p)) != 0)
- goto out;
- if ((r = cipher_crypt(state->receive_context, 0, p,
- sshbuf_ptr(state->input), padded_len, 0, 0)) != 0)
- goto out;
-
- if ((r = sshbuf_consume(state->input, padded_len)) != 0)
- goto out;
-
-#ifdef PACKET_DEBUG
- fprintf(stderr, "read_poll plain: ");
- sshbuf_dump(state->incoming_packet, stderr);
-#endif
-
- /* Compute packet checksum. */
- checksum = ssh_crc32(sshbuf_ptr(state->incoming_packet),
- sshbuf_len(state->incoming_packet) - 4);
-
- /* Skip padding. */
- if ((r = sshbuf_consume(state->incoming_packet, 8 - len % 8)) != 0)
- goto out;
-
- /* Test check bytes. */
- if (len != sshbuf_len(state->incoming_packet)) {
- error("%s: len %d != sshbuf_len %zd", __func__,
- len, sshbuf_len(state->incoming_packet));
- if ((r = sshpkt_disconnect(ssh, "invalid packet length")) != 0 ||
- (r = ssh_packet_write_wait(ssh)) != 0)
- return r;
- return SSH_ERR_CONN_CORRUPT;
- }
-
- cp = sshbuf_ptr(state->incoming_packet) + len - 4;
- stored_checksum = PEEK_U32(cp);
- if (checksum != stored_checksum) {
- error("Corrupted check bytes on input");
- if ((r = sshpkt_disconnect(ssh, "connection corrupted")) != 0 ||
- (r = ssh_packet_write_wait(ssh)) != 0)
- return r;
- return SSH_ERR_CONN_CORRUPT;
- }
- if ((r = sshbuf_consume_end(state->incoming_packet, 4)) < 0)
- goto out;
-
- if (state->packet_compression) {
- sshbuf_reset(state->compression_buffer);
- if ((r = uncompress_buffer(ssh, state->incoming_packet,
- state->compression_buffer)) != 0)
- goto out;
- sshbuf_reset(state->incoming_packet);
- if ((r = sshbuf_putb(state->incoming_packet,
- state->compression_buffer)) != 0)
- goto out;
- }
- state->p_read.packets++;
- state->p_read.bytes += padded_len + 4;
- if ((r = sshbuf_get_u8(state->incoming_packet, typep)) != 0)
- goto out;
- if (*typep < SSH_MSG_MIN || *typep > SSH_MSG_MAX) {
- error("Invalid ssh1 packet type: %d", *typep);
- if ((r = sshpkt_disconnect(ssh, "invalid packet type")) != 0 ||
- (r = ssh_packet_write_wait(ssh)) != 0)
- return r;
- return SSH_ERR_PROTOCOL_ERROR;
- }
- r = 0;
- out:
- return r;
-}
-
static int
ssh_packet_read_poll2_mux(struct ssh *ssh, u_char *typep, u_int32_t *seqnr_p)
{
-/* $OpenBSD: packet.h,v 1.77 2017/04/30 23:13:25 djm Exp $ */
+/* $OpenBSD: packet.h,v 1.78 2017/04/30 23:23:54 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
int ssh_packet_read(struct ssh *);
int ssh_packet_read_expect(struct ssh *, u_int type);
int ssh_packet_read_poll(struct ssh *);
-int ssh_packet_read_poll1(struct ssh *, u_char *);
int ssh_packet_read_poll2(struct ssh *, u_char *, u_int32_t *seqnr_p);
int ssh_packet_process_incoming(struct ssh *, const char *buf, u_int len);
int ssh_packet_read_seqnr(struct ssh *, u_char *, u_int32_t *seqnr_p);
int sshpkt_put_cstring(struct ssh *ssh, const void *v);
int sshpkt_put_stringb(struct ssh *ssh, const struct sshbuf *v);
int sshpkt_put_ec(struct ssh *ssh, const EC_POINT *v, const EC_GROUP *g);
-int sshpkt_put_bignum1(struct ssh *ssh, const BIGNUM *v);
int sshpkt_put_bignum2(struct ssh *ssh, const BIGNUM *v);
int sshpkt_get(struct ssh *ssh, void *valp, size_t len);
int sshpkt_get_string_direct(struct ssh *ssh, const u_char **valp, size_t *lenp);
int sshpkt_get_cstring(struct ssh *ssh, char **valp, size_t *lenp);
int sshpkt_get_ec(struct ssh *ssh, EC_POINT *v, const EC_GROUP *g);
-int sshpkt_get_bignum1(struct ssh *ssh, BIGNUM *v);
int sshpkt_get_bignum2(struct ssh *ssh, BIGNUM *v);
int sshpkt_get_end(struct ssh *ssh);
const u_char *sshpkt_ptr(struct ssh *, size_t *lenp);
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