1 files changed, 94 insertions, 0 deletions
diff --git a/plugin/environment.c b/plugin/environment.c
new file mode 100644
index 0000000..7dbeffe
--- /dev/null
+++ b/plugin/environment.c
@@ -0,0 +1,94 @@
+/* environment.c  --  Function for extracting data from the OpenVPN environment table
+ *
+ *  GPLv2 only - Copyright (C) 2008, 2009
+ *               David Sommerseth <dazo@users.sourceforge.net>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; version 2
+ *  of the License.
+ *
+ *  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; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+/**
+ * @file   environment.c
+ * @author David Sommerseth <dazo@users.sourceforge.net>
+ * @date   2008-08-06
+ *
+ * @brief  Function for extracting data from the OpenVPN environment table.
+ *
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include <eurephia_nullsafe.h>
+#include <eurephia_context.h>
+#include <eurephia_log.h>
+
+/**
+ * get_env() retrieve values from the openvpn environment table
+ *
+ * @param ctx        eurephiaCTX context
+ * @param logmasking If 1, the value will be masked in the log files (eg. to hide password)
+ * @param len        How many bytes to copy out of the environment variable
+ * @param envp       the environment table
+ * @param fmt        The key to look for (stdarg)
+ *
+ * @return Returns a const char * with the value, or NULL if not found
+ */
+char *get_env(eurephiaCTX *ctx, int logmasking, size_t len,
+                    const char *envp[], const char *fmt, ... )
+{
+        if (envp) {
+                va_list ap;
+                char key[384];
+                int keylen = 0;
+                int i;
+
+                // Build up the key we are looking for
+                memset(&key, 0, 384);
+                va_start(ap, fmt);
+                vsnprintf(key, 382, fmt, ap);
+
+                // Find the key
+                keylen = strlen (key);
+                for (i = 0; envp[i]; ++i) {
+                        if (!strncmp (envp[i], key, keylen)) {
+                                const char *cp = envp[i] + keylen;
+                char *ret = NULL;
+                                if (*cp == '=') {
+#ifdef ENABLE_DEBUG
+                                        int do_mask = 0;
+#ifndef SHOW_SECRETS
+                                        do_mask = logmasking;
+#endif
+                                        if( ctx != NULL ) {
+                                                DEBUG(ctx, 30, "Function call: get_env(envp, '%s') == '%s'",
+                                                      key, (do_mask == 0 ? cp + 1 : "xxxxxxxxxxxxxx"));
+                                        }
+#endif
+                                        ret = malloc_nullsafe(ctx, len+2);
+                                        strncpy(ret, cp+1, len);
+                                        return ret;
+                                }
+                        }
+                }
+                if( ctx != NULL ) {
+                        DEBUG(ctx, 15, "Function call: get_env(envp, '%s') -- environment variable not found",
+                              key);
+                }
+                va_end(ap);
+        }
+        return NULL;
+}