зеркало из https://github.com/Azure/sonic-openssh.git
upstream: Allow ssh_config IdentityAgent directive to accept
environment variable names as well as explicit paths. ok dtucker@ OpenBSD-Commit-ID: 2f0996e103876c53d8c9dd51dcce9889d700767b
This commit is contained in:
djm@openbsd.org
Damien Miller
Родитель
a46ac4d86b
Коммит
5eff5b858e
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@ -1,4 +1,4 @@
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/* $OpenBSD: auth-options.c,v 1.83 2018/06/19 02:59:41 djm Exp $ */
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/* $OpenBSD: auth-options.c,v 1.84 2018/10/03 06:38:35 djm Exp $ */
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/*
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* Copyright (c) 2018 Damien Miller <djm@mindrot.org>
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*
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@ -469,13 +469,16 @@ sshauthopt_parse(const char *opts, const char **errstrp)
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errstr = "invalid environment string";
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goto fail;
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}
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for (cp = opt; cp < tmp; cp++) {
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if (!isalnum((u_char)*cp) && *cp != '_') {
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if ((cp = strdup(opt)) == NULL)
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goto alloc_fail;
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cp[tmp - opt] = '\0'; /* truncate at '=' */
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if (!valid_env_name(cp)) {
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free(cp);
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free(opt);
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errstr = "invalid environment string";
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goto fail;
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}
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}
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free(cp);
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/* Append it. */
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oarray = ret->env;
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if ((ret->env = recallocarray(ret->env, ret->nenv,
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21
misc.c
21
misc.c
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@ -1,4 +1,4 @@
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/* $OpenBSD: misc.c,v 1.131 2018/07/27 05:13:02 dtucker Exp $ */
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/* $OpenBSD: misc.c,v 1.132 2018/10/03 06:38:35 djm Exp $ */
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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* Copyright (c) 2005,2006 Damien Miller. All rights reserved.
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@ -1948,6 +1948,25 @@ bad:
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return 0;
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}
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/*
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* Verify that a environment variable name (not including initial '$') is
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* valid; consisting of one or more alphanumeric or underscore characters only.
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* Returns 1 on valid, 0 otherwise.
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*/
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int
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valid_env_name(const char *name)
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{
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const char *cp;
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if (name[0] == '\0')
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return 0;
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for (cp = name; *cp != '\0'; cp++) {
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if (!isalnum((u_char)*cp) && *cp != '_')
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return 0;
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}
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return 1;
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}
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const char *
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atoi_err(const char *nptr, int *val)
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{
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3
misc.h
3
misc.h
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@ -1,4 +1,4 @@
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/* $OpenBSD: misc.h,v 1.74 2018/07/27 05:13:02 dtucker Exp $ */
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/* $OpenBSD: misc.h,v 1.75 2018/10/03 06:38:35 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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@ -74,6 +74,7 @@ double monotime_double(void);
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void lowercase(char *s);
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int unix_listener(const char *, int, int);
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int valid_domain(char *, int, const char **);
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int valid_env_name(const char *);
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const char *atoi_err(const char *, int *);
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int parse_absolute_time(const char *, uint64_t *);
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void format_absolute_time(uint64_t, char *, size_t);
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15
readconf.c
15
readconf.c
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@ -1,4 +1,4 @@
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/* $OpenBSD: readconf.c,v 1.298 2018/09/20 03:30:44 djm Exp $ */
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/* $OpenBSD: readconf.c,v 1.299 2018/10/03 06:38:35 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -1700,7 +1700,18 @@ parse_keytypes:
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case oIdentityAgent:
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charptr = &options->identity_agent;
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goto parse_string;
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arg = strdelim(&s);
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if (!arg || *arg == '\0')
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fatal("%.200s line %d: Missing argument.",
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filename, linenum);
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/* Extra validation if the string represents an env var. */
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if (arg[0] == '$' && !valid_env_name(arg + 1)) {
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fatal("%.200s line %d: Invalid environment name %s.",
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filename, linenum, arg);
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}
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if (*activep && *charptr == NULL)
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*charptr = xstrdup(arg);
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break;
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case oDeprecated:
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debug("%s line %d: Deprecated option \"%s\"",
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24
ssh.c
24
ssh.c
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@ -1,4 +1,4 @@
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/* $OpenBSD: ssh.c,v 1.493 2018/09/21 03:11:36 djm Exp $ */
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/* $OpenBSD: ssh.c,v 1.494 2018/10/03 06:38:35 djm Exp $ */
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/*
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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@ -1453,9 +1453,27 @@ main(int ac, char **av)
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"r", options.user,
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"u", pw->pw_name,
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(char *)NULL);
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setenv(SSH_AUTHSOCKET_ENV_NAME, cp, 1);
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free(cp);
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free(p);
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/*
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* If identity_agent represents an environment variable
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* then recheck that it is valid (since processing with
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* percent_expand() may have changed it) and substitute
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* its value.
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*/
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if (cp[0] == '$') {
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if (!valid_env_name(cp + 1)) {
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fatal("Invalid IdentityAgent "
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"environment variable name %s", cp);
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}
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if ((p = getenv(cp + 1)) == NULL)
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unsetenv(SSH_AUTHSOCKET_ENV_NAME);
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else
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setenv(SSH_AUTHSOCKET_ENV_NAME, p, 1);
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} else {
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/* identity_agent specifies a path directly */
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setenv(SSH_AUTHSOCKET_ENV_NAME, cp, 1);
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}
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free(cp);
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}
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}
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@ -33,8 +33,8 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $OpenBSD: ssh_config.5,v 1.285 2018/09/21 12:46:22 djm Exp $
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.Dd $Mdocdate: September 21 2018 $
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.\" $OpenBSD: ssh_config.5,v 1.286 2018/10/03 06:38:35 djm Exp $
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.Dd $Mdocdate: October 3 2018 $
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.Dt SSH_CONFIG 5
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.Os
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.Sh NAME
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@ -877,6 +877,10 @@ If the string
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is specified, the location of the socket will be read from the
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.Ev SSH_AUTH_SOCK
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environment variable.
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Otherwise if the specified value begins with a
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.Sq $
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character, then it will be treated as an environment variable containing
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the location of the socket.
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.Pp
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Arguments to
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.Cm IdentityAgent
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