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authorAlberto Gonzalez Iniesta <agi@inittab.org>2016-11-21 09:37:33 +0100
committerAlberto Gonzalez Iniesta <agi@inittab.org>2016-11-21 09:37:33 +0100
commit93b77cacdbb7e6f310c4e20f85c3a24ed5ba18ba (patch)
tree55a7688c9969ef4d01625caa58c7f679098c76eb /src/plugins/auth-pam/utils.c
parentdaa9ef0efeb5e10a1b43820fbab3a4ff5fbd22f1 (diff)
parent20c8675ba46bda97330a4117c459a59a9f1c465e (diff)
Merge tag 'upstream/2.4_beta1'
Upstream version 2.4~beta1
Diffstat (limited to 'src/plugins/auth-pam/utils.c')
-rw-r--r--src/plugins/auth-pam/utils.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/plugins/auth-pam/utils.c b/src/plugins/auth-pam/utils.c
new file mode 100644
index 0000000..4f2bec1
--- /dev/null
+++ b/src/plugins/auth-pam/utils.c
@@ -0,0 +1,113 @@
+/*
+ * OpenVPN -- An application to securely tunnel IP networks
+ * over a single TCP/UDP port, with support for SSL/TLS-based
+ * session authentication and key exchange,
+ * packet encryption, packet authentication, and
+ * packet compression.
+ *
+ * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * OpenVPN plugin module to do PAM authentication using a split
+ * privilege model.
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+
+#include <string.h>
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <stdint.h>
+
+#include "utils.h"
+
+char *
+searchandreplace(const char *tosearch, const char *searchfor, const char *replacewith)
+{
+ if (!tosearch || !searchfor || !replacewith) return NULL;
+
+ size_t tosearchlen = strlen(tosearch);
+ size_t replacewithlen = strlen(replacewith);
+ size_t templen = tosearchlen * replacewithlen;
+
+ if (tosearchlen == 0 || strlen(searchfor) == 0 || replacewithlen == 0) {
+ return NULL;
+ }
+
+ bool is_potential_integer_overflow = (templen == SIZE_MAX) || (templen / tosearchlen != replacewithlen);
+
+ if (is_potential_integer_overflow) {
+ return NULL;
+ }
+
+ // state: all parameters are valid
+
+ const char *searching=tosearch;
+ char *scratch;
+
+ char temp[templen+1];
+ temp[0]=0;
+
+ scratch = strstr(searching,searchfor);
+ if (!scratch) return strdup(tosearch);
+
+ while (scratch) {
+ strncat(temp,searching,scratch-searching);
+ strcat(temp,replacewith);
+
+ searching=scratch+strlen(searchfor);
+ scratch = strstr(searching,searchfor);
+ }
+ return strdup(temp);
+}
+
+const char *
+get_env (const char *name, const char *envp[])
+{
+ if (envp)
+ {
+ int i;
+ const int namelen = strlen (name);
+ for (i = 0; envp[i]; ++i)
+ {
+ if (!strncmp (envp[i], name, namelen))
+ {
+ const char *cp = envp[i] + namelen;
+ if (*cp == '=')
+ return cp + 1;
+ }
+ }
+ }
+ return NULL;
+}
+
+int
+string_array_len (const char *array[])
+{
+ int i = 0;
+ if (array)
+ {
+ while (array[i])
+ ++i;
+ }
+ return i;
+}