*/
#include "includes.h"
-RCSID("$OpenBSD: sshconnect.c,v 1.128 2002/07/09 11:56:50 itojun Exp $");
+RCSID("$OpenBSD: sshconnect.c,v 1.138 2003/04/08 20:21:29 itojun Exp $");
#include <openssl/bn.h>
extern char *__progname;
extern uid_t original_real_uid;
extern uid_t original_effective_uid;
+extern pid_t proxy_command_pid;
#ifndef INET6_ADDRSTRLEN /* for non IPv6 machines */
#define INET6_ADDRSTRLEN 46
#endif
-static const char *
-sockaddr_ntop(struct sockaddr *sa, socklen_t salen)
-{
- static char addrbuf[NI_MAXHOST];
-
- if (getnameinfo(sa, salen, addrbuf, sizeof(addrbuf), NULL, 0,
- NI_NUMERICHOST) != 0)
- fatal("sockaddr_ntop: getnameinfo NI_NUMERICHOST failed");
- return addrbuf;
-}
+static int show_other_keys(const char *, Key *);
/*
* Connect to the given ssh server using a proxy command.
/* Convert the port number into a string. */
snprintf(strport, sizeof strport, "%hu", port);
- /* Build the final command string in the buffer by making the
- appropriate substitutions to the given proxy command. */
+ /*
+ * Build the final command string in the buffer by making the
+ * appropriate substitutions to the given proxy command.
+ *
+ * Use "exec" to avoid "sh -c" processes on some platforms
+ * (e.g. Solaris)
+ */
buffer_init(&command);
+ buffer_append(&command, "exec ", 5);
+
for (cp = proxy_command; *cp; cp++) {
if (cp[0] == '%' && cp[1] == '%') {
buffer_append(&command, "%", 1);
/* Parent. */
if (pid < 0)
fatal("fork failed: %.100s", strerror(errno));
+ else
+ proxy_command_pid = pid; /* save pid to clean up later */
/* Close child side of the descriptors. */
close(pin[0]);
int sock = -1, attempt;
char ntop[NI_MAXHOST], strport[NI_MAXSERV];
struct addrinfo hints, *ai, *aitop;
- struct linger linger;
struct servent *sp;
/*
* Did we get only other errors than "Connection refused" (which
*/
int full_failure = 1;
- debug("ssh_connect: needpriv %d", needpriv);
+ debug2("ssh_connect: needpriv %d", needpriv);
/* Get default port if port has not been set. */
if (port == 0) {
} else {
if (errno == ECONNREFUSED)
full_failure = 0;
-#if 0
- log("ssh: connect to address %s port %s: %s",
- sockaddr_ntop(ai->ai_addr, ai->ai_addrlen),
- strport, strerror(errno));
-#endif
+ debug("connect to address %s port %s: %s",
+ ntop, strport, strerror(errno));
/*
* Close the failed socket; there appear to
* be some problems when reusing a socket for
freeaddrinfo(aitop);
/* Return failure if we didn't get a successful connection. */
- if (attempt >= connection_attempts)
+ if (attempt >= connection_attempts) {
+ logit("ssh: connect to host %s port %s: %s",
+ host, strport, strerror(errno));
return full_failure ? ECONNABORTED : ECONNREFUSED;
+ }
debug("Connection established.");
- /*
- * Set socket options. We would like the socket to disappear as soon
- * as it has been closed for whatever reason.
- */
- /* setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&on, sizeof(on)); */
- linger.l_onoff = 1;
- linger.l_linger = 5;
- setsockopt(sock, SOL_SOCKET, SO_LINGER, (void *)&linger, sizeof(linger));
-
/* Set keepalives if requested. */
if (options.keepalives &&
setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&on,
enable_compat13();
minor1 = 3;
if (options.forward_agent) {
- log("Agent forwarding disabled for protocol 1.3");
+ logit("Agent forwarding disabled for protocol 1.3");
options.forward_agent = 0;
}
}
int salen;
char ntop[NI_MAXHOST];
char msg[1024];
- int len, host_line, ip_line;
+ int len, host_line, ip_line, has_keys;
const char *host_file = NULL, *ip_file = NULL;
/*
debug("Found key in %s:%d", host_file, host_line);
if (options.check_host_ip && ip_status == HOST_NEW) {
if (readonly)
- log("%s host key for IP address "
+ logit("%s host key for IP address "
"'%.128s' not in list of known hosts.",
type, ip);
else if (!add_host_to_hostfile(user_hostfile, ip,
host_key))
- log("Failed to add the %s host key for IP "
+ logit("Failed to add the %s host key for IP "
"address '%.128s' to the list of known "
"hosts (%.30s).", type, ip, user_hostfile);
else
- log("Warning: Permanently added the %s host "
+ logit("Warning: Permanently added the %s host "
"key for IP address '%.128s' to the list "
"of known hosts.", type, ip);
}
"have requested strict checking.", type, host);
goto fail;
} else if (options.strict_host_key_checking == 2) {
+ has_keys = show_other_keys(host, host_key);
/* The default */
fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
snprintf(msg, sizeof(msg),
"The authenticity of host '%.200s (%s)' can't be "
- "established.\n"
+ "established%s\n"
"%s key fingerprint is %s.\n"
"Are you sure you want to continue connecting "
- "(yes/no)? ", host, ip, type, fp);
+ "(yes/no)? ",
+ host, ip,
+ has_keys ? ",\nbut keys of different type are already "
+ "known for this host." : ".",
+ type, fp);
xfree(fp);
if (!confirm(msg))
goto fail;
* local known_hosts file.
*/
if (!add_host_to_hostfile(user_hostfile, hostp, host_key))
- log("Failed to add the host to the list of known "
+ logit("Failed to add the host to the list of known "
"hosts (%.500s).", user_hostfile);
else
- log("Warning: Permanently added '%.200s' (%s) to the "
+ logit("Warning: Permanently added '%.200s' (%s) to the "
"list of known hosts.", hostp, type);
break;
case HOST_CHANGED:
* accept the authentication.
*/
break;
+ case HOST_FOUND:
+ fatal("internal error");
+ break;
}
if (options.check_host_ip && host_status != HOST_CHANGED &&
host_file, host_line);
}
if (options.strict_host_key_checking == 1) {
- log(msg);
+ logit(msg);
error("Exiting, you have requested strict checking.");
goto fail;
} else if (options.strict_host_key_checking == 2) {
if (!confirm(msg))
goto fail;
} else {
- log(msg);
+ logit(msg);
}
}
memset(padded, 0, size);
xfree(padded);
}
+
+static int
+show_key_from_file(const char *file, const char *host, int keytype)
+{
+ Key *found;
+ char *fp;
+ int line, ret;
+
+ found = key_new(keytype);
+ if ((ret = lookup_key_in_hostfile_by_type(file, host,
+ keytype, found, &line))) {
+ fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
+ logit("WARNING: %s key found for host %s\n"
+ "in %s:%d\n"
+ "%s key fingerprint %s.",
+ key_type(found), host, file, line,
+ key_type(found), fp);
+ xfree(fp);
+ }
+ key_free(found);
+ return (ret);
+}
+
+/* print all known host keys for a given host, but skip keys of given type */
+static int
+show_other_keys(const char *host, Key *key)
+{
+ int type[] = { KEY_RSA1, KEY_RSA, KEY_DSA, -1};
+ int i, found = 0;
+
+ for (i = 0; type[i] != -1; i++) {
+ if (type[i] == key->type)
+ continue;
+ if (type[i] != KEY_RSA1 &&
+ show_key_from_file(options.user_hostfile2, host, type[i])) {
+ found = 1;
+ continue;
+ }
+ if (type[i] != KEY_RSA1 &&
+ show_key_from_file(options.system_hostfile2, host, type[i])) {
+ found = 1;
+ continue;
+ }
+ if (show_key_from_file(options.user_hostfile, host, type[i])) {
+ found = 1;
+ continue;
+ }
+ if (show_key_from_file(options.system_hostfile, host, type[i])) {
+ found = 1;
+ continue;
+ }
+ debug2("no key of type %d for host %s", type[i], host);
+ }
+ return (found);
+}
andersk / openssh.git / blobdiff