mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-11-23 18:23:25 +08:00
eba71bab9b
[README.openssh2]
- interop w/ F-secure windows client
- sync documentation
- ssh_host_dsa_key not ssh_dsa_key
[auth-rsa.c]
- missing fclose
[auth.c authfile.c compat.c dsa.c dsa.h hostfile.c key.c key.h radix.c]
[readconf.c readconf.h ssh-add.c ssh-keygen.c ssh.c ssh.h sshconnect.c]
[sshd.c uuencode.c uuencode.h authfile.h]
- add DSA pubkey auth and other SSH2 fixes. use ssh-keygen -[xX]
for trading keys with the real and the original SSH, directly from the
people who invented the SSH protocol.
[auth.c auth.h authfile.c sshconnect.c auth1.c auth2.c sshconnect.h]
[sshconnect1.c sshconnect2.c]
- split auth/sshconnect in one file per protocol version
[sshconnect2.c]
- remove debug
[uuencode.c]
- add trailing =
[version.h]
- OpenSSH-2.0
[ssh-keygen.1 ssh-keygen.c]
- add -R flag: exit code indicates if RSA is alive
[sshd.c]
- remove unused
silent if -Q is specified
[ssh.h]
- host key becomes /etc/ssh_host_dsa_key
[readconf.c servconf.c ]
- ssh/sshd default to proto 1 and 2
[uuencode.c]
- remove debug
[auth2.c ssh-keygen.c sshconnect2.c sshd.c]
- xfree DSA blobs
[auth2.c serverloop.c session.c]
- cleanup logging for sshd/2, respect PasswordAuth no
[sshconnect2.c]
- less debug, respect .ssh/config
[README.openssh2 channels.c channels.h]
- clientloop.c session.c ssh.c
- support for x11-fwding, client+server
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*/
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#include "includes.h"
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RCSID("$OpenBSD: auth.c,v 1.6 2000/04/26 21:28:31 markus Exp $");
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#include "xmalloc.h"
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#include "rsa.h"
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#include "ssh.h"
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#include "pty.h"
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#include "packet.h"
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#include "buffer.h"
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#include "cipher.h"
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#include "mpaux.h"
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#include "servconf.h"
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#include "compat.h"
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#include "channels.h"
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#include "match.h"
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#include "bufaux.h"
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#include "ssh2.h"
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#include "auth.h"
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#include "session.h"
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#include "dispatch.h"
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/* import */
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extern ServerOptions options;
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extern char *forced_command;
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/*
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* Check if the user is allowed to log in via ssh. If user is listed in
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* DenyUsers or user's primary group is listed in DenyGroups, false will
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* be returned. If AllowUsers isn't empty and user isn't listed there, or
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* if AllowGroups isn't empty and user isn't listed there, false will be
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* returned.
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* If the user's shell is not executable, false will be returned.
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* Otherwise true is returned.
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*/
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int
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allowed_user(struct passwd * pw)
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{
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struct stat st;
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struct group *grp;
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int i;
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#ifdef WITH_AIXAUTHENTICATE
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char *loginmsg;
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#endif /* WITH_AIXAUTHENTICATE */
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/* Shouldn't be called if pw is NULL, but better safe than sorry... */
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if (!pw)
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return 0;
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/* deny if shell does not exists or is not executable */
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if (stat(pw->pw_shell, &st) != 0)
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return 0;
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if (!((st.st_mode & S_IFREG) && (st.st_mode & (S_IXOTH|S_IXUSR|S_IXGRP))))
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return 0;
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/* Return false if user is listed in DenyUsers */
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if (options.num_deny_users > 0) {
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if (!pw->pw_name)
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return 0;
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for (i = 0; i < options.num_deny_users; i++)
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if (match_pattern(pw->pw_name, options.deny_users[i]))
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return 0;
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}
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/* Return false if AllowUsers isn't empty and user isn't listed there */
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if (options.num_allow_users > 0) {
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if (!pw->pw_name)
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return 0;
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for (i = 0; i < options.num_allow_users; i++)
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if (match_pattern(pw->pw_name, options.allow_users[i]))
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break;
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/* i < options.num_allow_users iff we break for loop */
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if (i >= options.num_allow_users)
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return 0;
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}
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/* Get the primary group name if we need it. Return false if it fails */
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if (options.num_deny_groups > 0 || options.num_allow_groups > 0) {
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grp = getgrgid(pw->pw_gid);
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if (!grp)
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return 0;
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/* Return false if user's group is listed in DenyGroups */
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if (options.num_deny_groups > 0) {
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if (!grp->gr_name)
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return 0;
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for (i = 0; i < options.num_deny_groups; i++)
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if (match_pattern(grp->gr_name, options.deny_groups[i]))
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return 0;
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}
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/*
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* Return false if AllowGroups isn't empty and user's group
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* isn't listed there
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*/
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if (options.num_allow_groups > 0) {
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if (!grp->gr_name)
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return 0;
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for (i = 0; i < options.num_allow_groups; i++)
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if (match_pattern(grp->gr_name, options.allow_groups[i]))
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break;
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/* i < options.num_allow_groups iff we break for
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loop */
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if (i >= options.num_allow_groups)
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return 0;
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}
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}
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#ifdef WITH_AIXAUTHENTICATE
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if (loginrestrictions(pw->pw_name,S_LOGIN,NULL,&loginmsg) != 0)
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return 0;
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#endif /* WITH_AIXAUTHENTICATE */
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/* We found no reason not to let this user try to log on... */
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return 1;
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}
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