Add some new utility authenticators.

pam_securetty silently succeeds if the user is on a secure tty
as defined by /etc/ttys.

pam_ftp does "anonymous ftp" style authentication with options for
specifying the anonymous user(s).

2 files changed, 122 insertions, 0 deletions

diff --git a/lib/libpam/modules/pam_securetty/Makefile b/lib/libpam/modules/pam_securetty/Makefile
new file mode 100644
index 0000000..1bf77db
--- /dev/null
+++ b/lib/libpam/modules/pam_securetty/Makefile
@@ -0,0 +1,31 @@
+# Copyright 2001 Mark R V Murray
+# All rights reserved.
+#
+# 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.
+#
+# 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.
+#
+# $FreeBSD$
+
+LIB=		pam_securetty
+SHLIB_NAME=	pam_securetty.so
+SRCS=		pam_securetty.c
+
+.include <bsd.lib.mk>
diff --git a/lib/libpam/modules/pam_securetty/pam_securetty.c b/lib/libpam/modules/pam_securetty/pam_securetty.c
new file mode 100644
index 0000000..fe04b3c
--- /dev/null
+++ b/lib/libpam/modules/pam_securetty/pam_securetty.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 2001 Mark R V Murray
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <pwd.h>
+#include <ttyent.h>
+#include <string.h>
+
+#define PAM_SM_AUTH
+#include <security/pam_modules.h>
+#include <pam_mod_misc.h>
+
+#define TTY_PREFIX	"/dev/"
+
+PAM_EXTERN int 
+pam_sm_authenticate(pam_handle_t * pamh, int flags, int argc, const char **argv)
+{
+	struct ttyent  *ttyfileinfo;
+	struct passwd  *user_pwd;
+	int             i, options, retval;
+	const char     *username, *ttyname;
+
+	options = 0;
+	for (i = 0; i < argc; i++)
+		pam_std_option(&options, argv[i]);
+
+	retval = pam_get_user(pamh, &username, NULL);
+	if (retval != PAM_SUCCESS)
+		return retval;
+
+	retval = pam_get_item(pamh, PAM_TTY, (const void **)&ttyname);
+	if (retval != PAM_SUCCESS)
+		return retval;
+
+	/* Ignore any "/dev/" on the PAM_TTY item */
+	if (strncmp(TTY_PREFIX, ttyname, sizeof(TTY_PREFIX) - 1) == 0)
+		ttyname += sizeof(TTY_PREFIX) - 1;
+
+	/* If the user is not root, secure ttys do not apply */
+	user_pwd = getpwnam(username);
+	if (user_pwd == NULL)
+		return PAM_IGNORE;
+	else if (user_pwd->pw_uid != 0)
+		return PAM_SUCCESS;
+
+	ttyfileinfo = getttynam(ttyname);
+	if (ttyfileinfo == NULL)
+		return PAM_SERVICE_ERR;
+
+	if (ttyfileinfo->ty_status & TTY_SECURE)
+		return PAM_SUCCESS;
+	else
+		return PAM_PERM_DENIED;
+}
+
+PAM_EXTERN
+int 
+pam_sm_setcred(pam_handle_t * pamh, int flags, int argc, const char **argv)
+{
+	return PAM_SUCCESS;
+}
+
+/* end of module definition */
+
+PAM_MODULE_ENTRY("pam_securetty");