+/* $OpenBSD: auth.c,v 1.80 2008/11/04 07:58:09 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
*/
#include "includes.h"
-RCSID("$OpenBSD: auth.c,v 1.57 2005/01/22 08:17:59 dtucker Exp $");
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+
+#include <netinet/in.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+#include <pwd.h>
#ifdef HAVE_LOGIN_H
#include <login.h>
#endif
#ifdef USE_SHADOW
#include <shadow.h>
#endif
-
#ifdef HAVE_LIBGEN_H
#include <libgen.h>
#endif
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
#include "xmalloc.h"
#include "match.h"
#include "groupaccess.h"
#include "log.h"
+#include "buffer.h"
#include "servconf.h"
+#include "key.h"
+#include "hostfile.h"
#include "auth.h"
#include "auth-options.h"
#include "canohost.h"
-#include "buffer.h"
-#include "bufaux.h"
#include "uidswap.h"
#include "misc.h"
-#include "bufaux.h"
#include "packet.h"
#include "loginrec.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
#include "monitor_wrap.h"
+#include "version.h"
+#include "ssh-globus-usage.h"
+
/* import */
extern ServerOptions options;
+extern int use_privsep;
extern Buffer loginmsg;
+extern struct passwd *privsep_pw;
/* Debugging messages */
Buffer auth_debug;
struct stat st;
const char *hostname = NULL, *ipaddr = NULL, *passwd = NULL;
char *shell;
- int i;
+ u_int i;
#ifdef USE_SHADOW
struct spwd *spw = NULL;
#endif
#endif /* USE_SHADOW */
/* grab passwd field for locked account check */
+ passwd = pw->pw_passwd;
#ifdef USE_SHADOW
if (spw != NULL)
- passwd = spw->sp_pwdp;
+#ifdef USE_LIBIAF
+ passwd = get_iaf_password(pw);
#else
- passwd = pw->pw_passwd;
+ passwd = spw->sp_pwdp;
+#endif /* USE_LIBIAF */
#endif
/* check for locked account */
if (strstr(passwd, LOCKED_PASSWD_SUBSTR))
locked = 1;
#endif
+#ifdef USE_LIBIAF
+ free(passwd);
+#endif /* USE_LIBIAF */
if (locked) {
logit("User %.100s not allowed because account is locked",
pw->pw_name);
return 0;
}
- if (options.num_deny_users > 0 || options.num_allow_users > 0) {
+ if (options.num_deny_users > 0 || options.num_allow_users > 0 ||
+ options.num_deny_groups > 0 || options.num_allow_groups > 0) {
hostname = get_canonical_hostname(options.use_dns);
ipaddr = get_remote_ipaddr();
}
void (*authlog) (const char *fmt,...) = verbose;
char *authmsg;
+ if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
+ return;
+
/* Raise logging level */
if (authenticated == 1 ||
!authctxt->valid ||
method,
authctxt->valid ? "" : "invalid user ",
(authctxt->user && authctxt->user[0]) ?
- authctxt->user : "<implicit>",
+ authctxt->user : "unknown",
get_remote_ipaddr(),
get_remote_port(),
info);
strcmp(method, "challenge-response") == 0))
record_failed_login(authctxt->user,
get_canonical_hostname(options.use_dns), "ssh");
+# ifdef WITH_AIXAUTHENTICATE
+ if (authenticated)
+ sys_auth_record_login(authctxt->user,
+ get_canonical_hostname(options.use_dns), "ssh", &loginmsg);
+# endif
#endif
#ifdef SSH_AUDIT_EVENTS
- if (authenticated == 0 && !authctxt->postponed) {
- ssh_audit_event_t event;
-
- debug3("audit failed auth attempt, method %s euid %d",
- method, (int)geteuid());
- /*
- * Because the auth loop is used in both monitor and slave,
- * we must be careful to send each event only once and with
- * enough privs to write the event.
- */
- event = audit_classify_auth(method);
- switch(event) {
- case SSH_AUTH_FAIL_NONE:
- case SSH_AUTH_FAIL_PASSWD:
- case SSH_AUTH_FAIL_KBDINT:
- if (geteuid() == 0)
- audit_event(event);
- break;
- case SSH_AUTH_FAIL_PUBKEY:
- case SSH_AUTH_FAIL_HOSTBASED:
- case SSH_AUTH_FAIL_GSSAPI:
- /*
- * This is required to handle the case where privsep
- * is enabled but it's root logging in, since
- * use_privsep won't be cleared until after a
- * successful login.
- */
- if (geteuid() == 0)
- audit_event(event);
- else
- PRIVSEP(audit_event(event));
- break;
- default:
- error("unknown authentication audit event %d", event);
- }
- }
+ if (authenticated == 0 && !authctxt->postponed)
+ audit_event(audit_classify_auth(method));
#endif
+ if (authenticated) {
+ char *userdn = NULL;
+ char *mech_name = NULL;
+ ssh_gssapi_get_client_info(&userdn, &mech_name);
+ debug("REPORTING (%s) (%s) (%s) (%s) (%s) (%s) (%s)",
+ SSH_RELEASE, SSLeay_version(SSLEAY_VERSION),
+ method, mech_name?mech_name:"NULL", get_remote_ipaddr(),
+ (authctxt->user && authctxt->user[0])?
+ authctxt->user : "unknown",
+ userdn?userdn:"NULL");
+ ssh_globus_send_usage_metrics(SSH_RELEASE,
+ SSLeay_version(SSLEAY_VERSION),
+ method, mech_name, get_remote_ipaddr(),
+ authctxt->user, userdn);
+ }
}
/*
switch (options.permit_root_login) {
case PERMIT_YES:
return 1;
- break;
case PERMIT_NO_PASSWD:
if (strcmp(method, "password") != 0)
return 1;
* This returns a buffer allocated by xmalloc.
*/
char *
-expand_filename(const char *filename, struct passwd *pw)
+expand_authorized_keys(const char *filename, struct passwd *pw)
{
- Buffer buffer;
- char *file;
- const char *cp;
+ char *file, ret[MAXPATHLEN];
+ int i;
- /*
- * Build the filename string in the buffer by making the appropriate
- * substitutions to the given file name.
- */
- buffer_init(&buffer);
- for (cp = filename; *cp; cp++) {
- if (cp[0] == '%' && cp[1] == '%') {
- buffer_append(&buffer, "%", 1);
- cp++;
- continue;
- }
- if (cp[0] == '%' && cp[1] == 'h') {
- buffer_append(&buffer, pw->pw_dir, strlen(pw->pw_dir));
- cp++;
- continue;
- }
- if (cp[0] == '%' && cp[1] == 'u') {
- buffer_append(&buffer, pw->pw_name,
- strlen(pw->pw_name));
- cp++;
- continue;
- }
- buffer_append(&buffer, cp, 1);
- }
- buffer_append(&buffer, "\0", 1);
+ file = percent_expand(filename, "h", pw->pw_dir,
+ "u", pw->pw_name, (char *)NULL);
/*
* Ensure that filename starts anchored. If not, be backward
* compatible and prepend the '%h/'
*/
- file = xmalloc(MAXPATHLEN);
- cp = buffer_ptr(&buffer);
- if (*cp != '/')
- snprintf(file, MAXPATHLEN, "%s/%s", pw->pw_dir, cp);
- else
- strlcpy(file, cp, MAXPATHLEN);
-
- buffer_free(&buffer);
- return file;
+ if (*file == '/')
+ return (file);
+
+ i = snprintf(ret, sizeof(ret), "%s/%s", pw->pw_dir, file);
+ if (i < 0 || (size_t)i >= sizeof(ret))
+ fatal("expand_authorized_keys: path too long");
+ xfree(file);
+ return (xstrdup(ret));
}
char *
authorized_keys_file(struct passwd *pw)
{
- return expand_filename(options.authorized_keys_file, pw);
+ return expand_authorized_keys(options.authorized_keys_file, pw);
}
char *
authorized_keys_file2(struct passwd *pw)
{
- return expand_filename(options.authorized_keys_file2, pw);
+ return expand_authorized_keys(options.authorized_keys_file2, pw);
}
/* return ok if key exists in sysfile or userfile */
*
* Returns 0 on success and -1 on failure
*/
-int
+static int
secure_filename(FILE *f, const char *file, struct passwd *pw,
char *err, size_t errlen)
{
return 0;
}
+FILE *
+auth_openkeyfile(const char *file, struct passwd *pw, int strict_modes)
+{
+ char line[1024];
+ struct stat st;
+ int fd;
+ FILE *f;
+
+ /*
+ * Open the file containing the authorized keys
+ * Fail quietly if file does not exist
+ */
+ if ((fd = open(file, O_RDONLY|O_NONBLOCK)) == -1)
+ return NULL;
+
+ if (fstat(fd, &st) < 0) {
+ close(fd);
+ return NULL;
+ }
+ if (!S_ISREG(st.st_mode)) {
+ logit("User %s authorized keys %s is not a regular file",
+ pw->pw_name, file);
+ close(fd);
+ return NULL;
+ }
+ unset_nonblock(fd);
+ if ((f = fdopen(fd, "r")) == NULL) {
+ close(fd);
+ return NULL;
+ }
+ if (options.strict_modes &&
+ secure_filename(f, file, pw, line, sizeof(line)) != 0) {
+ fclose(f);
+ logit("Authentication refused: %s", line);
+ return NULL;
+ }
+
+ return f;
+}
+
struct passwd *
getpwnamallow(const char *user)
{
#endif
struct passwd *pw;
+ parse_server_match_config(&options, user,
+ get_canonical_hostname(options.use_dns), get_remote_ipaddr());
+
pw = getpwnam(user);
+#ifdef USE_PAM
+ if (options.use_pam && options.permit_pam_user_change && pw == NULL)
+ pw = sshpam_getpw(user);
+#endif
if (pw == NULL) {
logit("Invalid user %.100s from %.100s",
- (user && user[0]) ? user : "<implicit>",
+ (user && user[0]) ? user : "unknown",
get_remote_ipaddr());
#ifdef CUSTOM_FAILED_LOGIN
record_failed_login(user,
fake.pw_passwd =
"$2a$06$r3.juUaHZDlIbQaO2dS9FuYxL1W9M81R1Tc92PoSNmzvpEqLkLGrK";
fake.pw_gecos = "NOUSER";
- fake.pw_uid = (uid_t)-1;
- fake.pw_gid = (gid_t)-1;
+ fake.pw_uid = privsep_pw == NULL ? (uid_t)-1 : privsep_pw->pw_uid;
+ fake.pw_gid = privsep_pw == NULL ? (gid_t)-1 : privsep_pw->pw_gid;
#ifdef HAVE_PW_CLASS_IN_PASSWD
fake.pw_class = "";
#endif
andersk / gssapi-openssh.git / blobdiff