if ((flags & FLAG_STDERR) && (flags & FLAG_VERBOSE)) \
fprintf(stderr, "%s\n", s); }
-#define bombout(msg) ( ssh_state == SSH_STATE_CLOSED, closesocket(s), \
+#define bombout(msg) ( ssh_state = SSH_STATE_CLOSED, closesocket(s), \
s = INVALID_SOCKET, connection_fatal msg )
#define SSH1_MSG_DISCONNECT 1 /* 0x1 */
extern const struct ssh_hostkey ssh_dss;
const static struct ssh_hostkey *hostkey_algs[] = { &ssh_dss };
-extern const struct ssh_mac ssh_sha1;
+extern const struct ssh_mac ssh_md5, ssh_sha1, ssh_sha1_buggy;
static void nullmac_key(unsigned char *key) { }
static void nullmac_generate(unsigned char *blk, int len, unsigned long seq) { }
const static struct ssh_mac ssh_mac_none = {
nullmac_key, nullmac_key, nullmac_generate, nullmac_verify, "none", 0
};
-const static struct ssh_mac *macs[] = { &ssh_sha1, &ssh_mac_none };
+const static struct ssh_mac *macs[] = {
+ &ssh_sha1, &ssh_md5, &ssh_mac_none };
+const static struct ssh_mac *buggymacs[] = {
+ &ssh_sha1_buggy, &ssh_md5, &ssh_mac_none };
const static struct ssh_compress ssh_comp_none = {
"none"
fputc(buf[i], stderr);
return;
}
- while (len--)
- c_write1(*buf++);
-}
-
-static void c_writedata (char *buf, int len) {
- while (len--)
- c_write1(*buf++);
+ from_backend(1, buf, len);
}
/*
if (cipher)
cipher->decrypt(pktin.data, st->biglen);
+#if 0
+ debug(("Got packet len=%d pad=%d\r\n", st->len, st->pad));
+ for (st->i = 0; st->i < st->biglen; st->i++)
+ debug((" %02x", (unsigned char)pktin.data[st->i]));
+ debug(("\r\n"));
+#endif
pktin.type = pktin.data[st->pad];
pktin.body = pktin.data + st->pad + 1;
PUT_32BIT(pktout.data+biglen, crc);
PUT_32BIT(pktout.data, len);
+#if 0
+ debug(("Sending packet len=%d\r\n", biglen+4));
+ for (i = 0; i < biglen+4; i++)
+ debug((" %02x", (unsigned char)pktout.data[i]));
+ debug(("\r\n"));
+#endif
if (cipher)
cipher->encrypt(pktout.data+4, biglen);
* state.
*/
#include <stdio.h>
-void sha_string(SHA_State *s, void *str, int len) {
+static void sha_string(SHA_State *s, void *str, int len) {
unsigned char lenblk[4];
PUT_32BIT(lenblk, len);
SHA_Bytes(s, lenblk, 4);
/*
* SSH2 packet construction functions.
*/
-void ssh2_pkt_adddata(void *data, int len) {
+static void ssh2_pkt_adddata(void *data, int len) {
pktout.length += len;
if (pktout.maxlen < pktout.length) {
pktout.maxlen = pktout.length + 256;
}
memcpy(pktout.data+pktout.length-len, data, len);
}
-void ssh2_pkt_addbyte(unsigned char byte) {
+static void ssh2_pkt_addbyte(unsigned char byte) {
ssh2_pkt_adddata(&byte, 1);
}
-void ssh2_pkt_init(int pkt_type) {
+static void ssh2_pkt_init(int pkt_type) {
pktout.length = 5;
ssh2_pkt_addbyte((unsigned char)pkt_type);
}
-void ssh2_pkt_addbool(unsigned char value) {
+static void ssh2_pkt_addbool(unsigned char value) {
ssh2_pkt_adddata(&value, 1);
}
-void ssh2_pkt_adduint32(unsigned long value) {
+static void ssh2_pkt_adduint32(unsigned long value) {
unsigned char x[4];
PUT_32BIT(x, value);
ssh2_pkt_adddata(x, 4);
}
-void ssh2_pkt_addstring_start(void) {
+static void ssh2_pkt_addstring_start(void) {
ssh2_pkt_adduint32(0);
pktout.savedpos = pktout.length;
}
-void ssh2_pkt_addstring_str(char *data) {
+static void ssh2_pkt_addstring_str(char *data) {
ssh2_pkt_adddata(data, strlen(data));
PUT_32BIT(pktout.data + pktout.savedpos - 4,
pktout.length - pktout.savedpos);
}
-void ssh2_pkt_addstring_data(char *data, int len) {
+static void ssh2_pkt_addstring_data(char *data, int len) {
ssh2_pkt_adddata(data, len);
PUT_32BIT(pktout.data + pktout.savedpos - 4,
pktout.length - pktout.savedpos);
}
-void ssh2_pkt_addstring(char *data) {
+static void ssh2_pkt_addstring(char *data) {
ssh2_pkt_addstring_start();
ssh2_pkt_addstring_str(data);
}
-char *ssh2_mpint_fmt(Bignum b, int *len) {
+static char *ssh2_mpint_fmt(Bignum b, int *len) {
unsigned char *p;
int i, n = b[0];
p = malloc(n * 2 + 1);
*len = n*2+1-i;
return p;
}
-void ssh2_pkt_addmp(Bignum b) {
+static void ssh2_pkt_addmp(Bignum b) {
unsigned char *p;
int len;
p = ssh2_mpint_fmt(b, &len);
ssh2_pkt_addstring_data(p, len);
free(p);
}
-void ssh2_pkt_send(void) {
+static void ssh2_pkt_send(void) {
int cipherblk, maclen, padding, i;
static unsigned long outgoing_sequence = 0;
}
#endif
-void sha_mpint(SHA_State *s, Bignum b) {
+static void sha_mpint(SHA_State *s, Bignum b) {
unsigned char *p;
int len;
p = ssh2_mpint_fmt(b, &len);
/*
* SSH2 packet decode functions.
*/
-unsigned long ssh2_pkt_getuint32(void) {
+static unsigned long ssh2_pkt_getuint32(void) {
unsigned long value;
if (pktin.length - pktin.savedpos < 4)
return 0; /* arrgh, no way to decline (FIXME?) */
pktin.savedpos += 4;
return value;
}
-void ssh2_pkt_getstring(char **p, int *length) {
+static void ssh2_pkt_getstring(char **p, int *length) {
*p = NULL;
if (pktin.length - pktin.savedpos < 4)
return;
*p = pktin.data+pktin.savedpos;
pktin.savedpos += *length;
}
-Bignum ssh2_pkt_getmp(void) {
+static Bignum ssh2_pkt_getmp(void) {
char *p;
int i, j, length;
Bignum b;
static unsigned char buffer[32];
tried_publickey = 1;
- i = loadrsakey(cfg.keyfile, &pubkey, password);
+ i = loadrsakey(cfg.keyfile, &pubkey, NULL, password);
if (i == 0) {
c_write("Couldn't load public key from ", 30);
c_write(cfg.keyfile, strlen(cfg.keyfile));
if (pktin.type == SSH1_SMSG_STDOUT_DATA ||
pktin.type == SSH1_SMSG_STDERR_DATA) {
long len = GET_32BIT(pktin.body);
- c_writedata(pktin.body+4, len);
+ from_backend(pktin.type == SSH1_SMSG_STDERR_DATA,
+ pktin.body+4, len);
} else if (pktin.type == SSH1_MSG_DISCONNECT) {
ssh_state = SSH_STATE_CLOSED;
logevent("Received disconnect request");
/*
* Utility routine for decoding comma-separated strings in KEXINIT.
*/
-int in_commasep_string(char *needle, char *haystack, int haylen) {
+static int in_commasep_string(char *needle, char *haystack, int haylen) {
int needlen = strlen(needle);
while (1) {
/*
/*
* SSH2 key creation method.
*/
-void ssh2_mkkey(Bignum K, char *H, char chr, char *keyspace) {
+static void ssh2_mkkey(Bignum K, char *H, char chr, char *keyspace) {
SHA_State s;
/* First 20 bytes. */
SHA_Init(&s);
static int i, len;
static char *str;
static Bignum e, f, K;
+ static const struct ssh_mac **maclist;
+ static int nmacs;
static const struct ssh_cipher *cscipher_tobe = NULL;
static const struct ssh_cipher *sccipher_tobe = NULL;
static const struct ssh_mac *csmac_tobe = NULL;
preferred_cipher = &ssh_3des_ssh2;
}
+ /*
+ * Be prepared to work around the buggy MAC problem.
+ */
+ if (cfg.buggymac)
+ maclist = buggymacs, nmacs = lenof(buggymacs);
+ else
+ maclist = macs, nmacs = lenof(macs);
+
begin_key_exchange:
/*
* Construct and send our key exchange packet.
}
/* List client->server MAC algorithms. */
ssh2_pkt_addstring_start();
- for (i = 0; i < lenof(macs); i++) {
- ssh2_pkt_addstring_str(macs[i]->name);
- if (i < lenof(macs)-1)
+ for (i = 0; i < nmacs; i++) {
+ ssh2_pkt_addstring_str(maclist[i]->name);
+ if (i < nmacs-1)
ssh2_pkt_addstring_str(",");
}
/* List server->client MAC algorithms. */
ssh2_pkt_addstring_start();
- for (i = 0; i < lenof(macs); i++) {
- ssh2_pkt_addstring_str(macs[i]->name);
- if (i < lenof(macs)-1)
+ for (i = 0; i < nmacs; i++) {
+ ssh2_pkt_addstring_str(maclist[i]->name);
+ if (i < nmacs-1)
ssh2_pkt_addstring_str(",");
}
/* List client->server compression algorithms. */
}
}
ssh2_pkt_getstring(&str, &len); /* client->server mac */
- for (i = 0; i < lenof(macs); i++) {
- if (in_commasep_string(macs[i]->name, str, len)) {
- csmac_tobe = macs[i];
+ for (i = 0; i < nmacs; i++) {
+ if (in_commasep_string(maclist[i]->name, str, len)) {
+ csmac_tobe = maclist[i];
break;
}
}
ssh2_pkt_getstring(&str, &len); /* server->client mac */
- for (i = 0; i < lenof(macs); i++) {
- if (in_commasep_string(macs[i]->name, str, len)) {
- scmac_tobe = macs[i];
+ for (i = 0; i < nmacs; i++) {
+ if (in_commasep_string(maclist[i]->name, str, len)) {
+ scmac_tobe = maclist[i];
break;
}
}
ssh2_pkt_init(SSH2_MSG_CHANNEL_OPEN);
ssh2_pkt_addstring("session");
ssh2_pkt_adduint32(mainchan->localid);
- ssh2_pkt_adduint32(0x7FFFFFFFUL); /* our window size */
+ ssh2_pkt_adduint32(0x8000UL); /* our window size */
ssh2_pkt_adduint32(0x4000UL); /* our max pkt size */
ssh2_pkt_send();
crWaitUntilV(ispkt);
continue; /* extended but not stderr */
ssh2_pkt_getstring(&data, &length);
if (data) {
- c_writedata(data, length);
+ from_backend(pktin.type == SSH2_MSG_CHANNEL_EXTENDED_DATA,
+ data, length);
/*
* Enlarge the window again at the remote side,
* just in case it ever runs down and they fail
logevent("All channels closed. Disconnecting");
ssh2_pkt_init(SSH2_MSG_DISCONNECT);
ssh2_pkt_send();
+ ssh_state = SSH_STATE_CLOSED;
+ closesocket(s);
+ s = INVALID_SOCKET;
}
continue; /* remote sends close; ignore (FIXME) */
} else if (pktin.type == SSH2_MSG_CHANNEL_WINDOW_ADJUST) {
ssh2_pkt_send();
}
logevent("Sent EOF message");
+ } else if (code == TS_PING) {
+ if (ssh_version == 1) {
+ send_packet(SSH1_MSG_IGNORE, PKT_STR, "", PKT_END);
+ } else {
+ ssh2_pkt_init(SSH2_MSG_IGNORE);
+ ssh2_pkt_addstring_start();
+ ssh2_pkt_send();
+ }
} else {
/* do nothing */
}
ssh_size,
ssh_special,
ssh_socket,
- ssh_sendok
+ ssh_sendok,
+ 22
};
projects / u / mdw / putty / blobdiff