1 files changed, 158 insertions, 0 deletions
diff --git a/modules/pam_localuser/pam_localuser.c b/modules/pam_localuser/pam_localuser.c
new file mode 100644
index 0000000..e32ea6d
--- /dev/null
+++ b/modules/pam_localuser/pam_localuser.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2001, 2004 Red Hat, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, and the entire permission notice in its entirety,
+ *    including the disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of
+ * the GNU Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is
+ * necessary due to a potential bad interaction between the GPL and
+ * the restrictions contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#define PAM_SM_AUTH
+#define PAM_SM_ACCOUNT
+#include <security/pam_modules.h>
+#include <security/_pam_macros.h>
+#include <security/pam_ext.h>
+
+#define MODULE_NAME "pam_localuser"
+
+int
+pam_sm_authenticate (pam_handle_t *pamh, int flags UNUSED,
+		     int argc, const char **argv)
+{
+	int i, ret = PAM_SUCCESS;
+	FILE *fp;
+	int debug = 0;
+	const char *filename = "/etc/passwd";
+	char line[LINE_MAX], name[LINE_MAX];
+	const char* user;
+
+	/* process arguments */
+	for(i = 0; i < argc; i++) {
+		if(strcmp("debug", argv[i]) == 0) {
+			debug = 1;
+		}
+	}
+	for(i = 0; i < argc; i++) {
+		if(strncmp("file=", argv[i], 5) == 0) {
+			filename = argv[i] + 5;
+			if(debug) {
+				pam_syslog (pamh, LOG_DEBUG,
+					    "set filename to \"%s\"",
+				            filename);
+			}
+		}
+	}
+
+	/* open the file */
+	fp = fopen(filename, "r");
+	if(fp == NULL) {
+		pam_syslog (pamh, LOG_ERR, "error opening \"%s\": %m",
+			    filename);
+		return PAM_SYSTEM_ERR;
+	}
+
+	if(pam_get_user(pamh, &user, NULL) != PAM_SUCCESS) {
+		pam_syslog (pamh, LOG_ERR, "user name not specified yet");
+		fclose(fp);
+		return PAM_SYSTEM_ERR;
+	}
+
+	if ((user == NULL) || (strlen(user) == 0)) {
+		pam_syslog (pamh, LOG_ERR, "user name not valid");
+		fclose(fp);
+		return PAM_SYSTEM_ERR;
+	}
+
+	/* scan the file, using fgets() instead of fgetpwent() because i
+	 * don't want to mess with applications which call fgetpwent() */
+	ret = PAM_PERM_DENIED;
+	snprintf(name, sizeof(name), "%s:", user);
+	i = strlen(name);
+	while(fgets(line, sizeof(line), fp) != NULL) {
+		if(debug) {
+			pam_syslog (pamh, LOG_DEBUG, "checking \"%s\"", line);
+		}
+		if(strncmp(name, line, i) == 0) {
+			ret = PAM_SUCCESS;
+			break;
+		}
+	}
+
+	/* okay, we're done */
+	fclose(fp);
+	return ret;
+}
+
+int
+pam_sm_setcred (pam_handle_t *pamh UNUSED, int flags UNUSED,
+		int argc UNUSED, const char **argv UNUSED)
+{
+	return PAM_SUCCESS;
+}
+
+int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc, const char **argv)
+{
+	return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+int
+pam_sm_open_session (pam_handle_t *pamh, int flags,
+		     int argc, const char **argv)
+{
+	return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+int
+pam_sm_close_session (pam_handle_t *pamh, int flags,
+		      int argc, const char **argv)
+{
+	return pam_sm_authenticate(pamh, flags, argc, argv);
+}
+
+int
+pam_sm_chauthtok (pam_handle_t *pamh, int flags,
+		  int argc, const char **argv)
+{
+	return pam_sm_authenticate(pamh, flags, argc, argv);
+}