summaryrefslogtreecommitdiff
path: root/readconf.c
diff options
context:
space:
mode:
Diffstat (limited to 'readconf.c')
-rw-r--r--readconf.c95
1 files changed, 89 insertions, 6 deletions
diff --git a/readconf.c b/readconf.c
index 9dcc383d..cb2999d8 100644
--- a/readconf.c
+++ b/readconf.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: readconf.c,v 1.256 2016/06/03 04:09:38 dtucker Exp $ */
+/* $OpenBSD: readconf.c,v 1.257 2016/07/15 00:24:30 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -170,7 +170,7 @@ typedef enum {
oCanonicalizeFallbackLocal, oCanonicalizePermittedCNAMEs,
oStreamLocalBindMask, oStreamLocalBindUnlink, oRevokedHostKeys,
oFingerprintHash, oUpdateHostkeys, oHostbasedKeyTypes,
- oPubkeyAcceptedKeyTypes,
+ oPubkeyAcceptedKeyTypes, oProxyJump,
oIgnoredUnknownOption, oDeprecated, oUnsupported
} OpCodes;
@@ -295,6 +295,7 @@ static struct {
{ "hostbasedkeytypes", oHostbasedKeyTypes },
{ "pubkeyacceptedkeytypes", oPubkeyAcceptedKeyTypes },
{ "ignoreunknown", oIgnoreUnknown },
+ { "proxyjump", oProxyJump },
{ NULL, oBadOption }
};
@@ -1121,6 +1122,9 @@ parse_char_array:
case oProxyCommand:
charptr = &options->proxy_command;
+ /* Ignore ProxyCommand if ProxyJump already specified */
+ if (options->jump_host != NULL)
+ charptr = &options->jump_host; /* Skip below */
parse_command:
if (s == NULL)
fatal("%.200s line %d: Missing argument.", filename, linenum);
@@ -1129,6 +1133,18 @@ parse_command:
*charptr = xstrdup(s + len);
return 0;
+ case oProxyJump:
+ if (s == NULL) {
+ fatal("%.200s line %d: Missing argument.",
+ filename, linenum);
+ }
+ len = strspn(s, WHITESPACE "=");
+ if (parse_jump(s + len, options, *activep) == -1) {
+ fatal("%.200s line %d: Invalid ProxyJump \"%s\"",
+ filename, linenum, s + len);
+ }
+ return 0;
+
case oPort:
intptr = &options->port;
parse_int:
@@ -1789,6 +1805,10 @@ initialize_options(Options * options)
options->hostname = NULL;
options->host_key_alias = NULL;
options->proxy_command = NULL;
+ options->jump_user = NULL;
+ options->jump_host = NULL;
+ options->jump_port = -1;
+ options->jump_extra = NULL;
options->user = NULL;
options->escape_char = -1;
options->num_system_hostfiles = 0;
@@ -2261,6 +2281,44 @@ parse_forward(struct Forward *fwd, const char *fwdspec, int dynamicfwd, int remo
return (0);
}
+int
+parse_jump(const char *s, Options *o, int active)
+{
+ char *orig, *sdup, *cp;
+ char *host = NULL, *user = NULL;
+ int ret = -1, port = -1;
+
+ active &= o->proxy_command == NULL && o->jump_host == NULL;
+
+ orig = sdup = xstrdup(s);
+ while ((cp = strsep(&sdup, ",")) && cp != NULL) {
+ if (active) {
+ /* First argument and configuration is active */
+ if (parse_user_host_port(cp, &user, &host, &port) != 0)
+ goto out;
+ } else {
+ /* Subsequent argument or inactive configuration */
+ if (parse_user_host_port(cp, NULL, NULL, NULL) != 0)
+ goto out;
+ }
+ active = 0; /* only check syntax for subsequent hosts */
+ }
+ /* success */
+ free(orig);
+ o->jump_user = user;
+ o->jump_host = host;
+ o->jump_port = port;
+ o->proxy_command = xstrdup("none");
+ user = host = NULL;
+ if ((cp = strchr(s, ',')) != NULL && cp[1] != '\0')
+ o->jump_extra = xstrdup(cp + 1);
+ ret = 0;
+ out:
+ free(user);
+ free(host);
+ return ret;
+}
+
/* XXX the following is a near-vebatim copy from servconf.c; refactor */
static const char *
fmt_multistate_int(int val, const struct multistate *m)
@@ -2412,7 +2470,7 @@ void
dump_client_config(Options *o, const char *host)
{
int i;
- char vbuf[5];
+ char buf[8];
/* This is normally prepared in ssh_kex2 */
if (kex_assemble_names(KEX_DEFAULT_PK_ALG, &o->hostkeyalgorithms) != 0)
@@ -2490,7 +2548,6 @@ dump_client_config(Options *o, const char *host)
dump_cfg_string(oMacs, o->macs ? o->macs : KEX_CLIENT_MAC);
dump_cfg_string(oPKCS11Provider, o->pkcs11_provider);
dump_cfg_string(oPreferredAuthentications, o->preferred_authentications);
- dump_cfg_string(oProxyCommand, o->proxy_command);
dump_cfg_string(oPubkeyAcceptedKeyTypes, o->pubkey_key_types);
dump_cfg_string(oRevokedHostKeys, o->revoked_host_keys);
dump_cfg_string(oXAuthLocation, o->xauth_location);
@@ -2551,8 +2608,8 @@ dump_client_config(Options *o, const char *host)
if (o->escape_char == SSH_ESCAPECHAR_NONE)
printf("escapechar none\n");
else {
- vis(vbuf, o->escape_char, VIS_WHITE, 0);
- printf("escapechar %s\n", vbuf);
+ vis(buf, o->escape_char, VIS_WHITE, 0);
+ printf("escapechar %s\n", buf);
}
/* oIPQoS */
@@ -2566,4 +2623,30 @@ dump_client_config(Options *o, const char *host)
/* oStreamLocalBindMask */
printf("streamlocalbindmask 0%o\n",
o->fwd_opts.streamlocal_bind_mask);
+
+ /* oProxyCommand / oProxyJump */
+ if (o->jump_host == NULL)
+ dump_cfg_string(oProxyCommand, o->proxy_command);
+ else {
+ /* Check for numeric addresses */
+ i = strchr(o->jump_host, ':') != NULL ||
+ strspn(o->jump_host, "1234567890.") == strlen(o->jump_host);
+ snprintf(buf, sizeof(buf), "%d", o->jump_port);
+ printf("proxyjump %s%s%s%s%s%s%s%s%s\n",
+ /* optional user */
+ o->jump_user == NULL ? "" : o->jump_user,
+ o->jump_user == NULL ? "" : "@",
+ /* opening [ if hostname is numeric */
+ i ? "[" : "",
+ /* mandatory hostname */
+ o->jump_host,
+ /* closing ] if hostname is numeric */
+ i ? "]" : "",
+ /* optional port number */
+ o->jump_port <= 0 ? "" : ":",
+ o->jump_port <= 0 ? "" : buf,
+ /* optional additional jump spec */
+ o->jump_extra == NULL ? "" : ",",
+ o->jump_extra == NULL ? "" : o->jump_extra);
+ }
}