1 files changed, 115 insertions, 0 deletions
diff --git a/lib/libpam/modules/pam_ftpusers/pam_ftpusers.c b/lib/libpam/modules/pam_ftpusers/pam_ftpusers.c
new file mode 100644
index 0000000..421955a
--- /dev/null
+++ b/lib/libpam/modules/pam_ftpusers/pam_ftpusers.c
@@ -0,0 +1,115 @@
+/*-
+ * Copyright (c) 2001 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * This software was developed for the FreeBSD Project by ThinkSec AS and
+ * NAI Labs, the Security Research Division of Network Associates, Inc.
+ * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
+ * DARPA CHATS research program.
+ *
+ * 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, this list of conditions and the following disclaimer.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <ctype.h>
+#include <grp.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define PAM_SM_ACCOUNT
+
+#include <security/pam_appl.h>
+#include <security/pam_modules.h>
+#include <security/pam_mod_misc.h>
+#include <security/openpam.h>
+
+PAM_EXTERN int
+pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused,
+    int argc __unused, const char *argv[] __unused)
+{
+	struct passwd *pwd;
+	struct group *grp;
+	const char *user;
+	int pam_err, found, allow;
+	char *line, *name, **mem;
+	size_t len, ulen;
+	FILE *f;
+
+	pam_err = pam_get_user(pamh, &user, NULL);
+	if (pam_err != PAM_SUCCESS)
+		return (pam_err);
+	if (user == NULL || (pwd = getpwnam(user)) == NULL)
+		return (PAM_SERVICE_ERR);
+
+	found = 0;
+	ulen = strlen(user);
+	if ((f = fopen(_PATH_FTPUSERS, "r")) == NULL) {
+		PAM_LOG("%s: %m", _PATH_FTPUSERS);
+		goto done;
+	}
+	while (!found && (line = fgetln(f, &len)) != NULL) {
+		if (*line == '#')
+			continue;
+		while (len > 0 && isspace(line[len - 1]))
+			--len;
+		if (len == 0)
+			continue;
+		/* simple case first */
+		if (*line != '@') {
+			if (len == ulen && strncmp(user, line, len) == 0)
+				found = 1;
+			continue;
+		}
+		/* member of specified group? */
+		asprintf(&name, "%.*s", (int)len - 1, line + 1);
+		if (name == NULL) {
+			fclose(f);
+			return (PAM_BUF_ERR);
+		}
+		grp = getgrnam(name);
+		free(name);
+		if (grp == NULL)
+			continue;
+		for (mem = grp->gr_mem; mem && *mem && !found; ++mem)
+			if (strcmp(user, *mem) == 0)
+				found = 1;
+	}
+ done:
+	allow = (openpam_get_option(pamh, "disallow") == NULL);
+	if (found)
+		pam_err = allow ? PAM_SUCCESS : PAM_AUTH_ERR;
+	else
+		pam_err = allow ? PAM_AUTH_ERR : PAM_SUCCESS;
+	if (f != NULL)
+		fclose(f);
+	return (pam_err);
+}
+
+PAM_MODULE_ENTRY("pam_ftpusers");