1 files changed, 131 insertions, 0 deletions
diff --git a/modules/pam_pwhistory/pwhistory_config.c b/modules/pam_pwhistory/pwhistory_config.c
new file mode 100644
index 00000000..692cf80e
--- /dev/null
+++ b/modules/pam_pwhistory/pwhistory_config.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2022 Iker Pedrosa <ipedrosa@redhat.com>
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <syslog.h>
+#include <sys/stat.h>
+
+#include <security/pam_modutil.h>
+
+#include "pam_inline.h"
+#include "pwhistory_config.h"
+
+#define PWHISTORY_DEFAULT_CONF SCONFIGDIR "/pwhistory.conf"
+
+#ifdef VENDOR_SCONFIGDIR
+#define VENDOR_PWHISTORY_DEFAULT_CONF (VENDOR_SCONFIGDIR "/pwhistory.conf")
+#endif
+
+void
+parse_config_file(pam_handle_t *pamh, int argc, const char **argv,
+                  struct options_t *options)
+{
+    const char *fname = NULL;
+    int i;
+    char *val;
+
+    for (i = 0; i < argc; ++i) {
+        const char *str = pam_str_skip_prefix(argv[i], "conf=");
+
+        if (str != NULL) {
+            fname = str;
+        }
+    }
+
+    if (fname == NULL) {
+        fname = PWHISTORY_DEFAULT_CONF;
+
+#ifdef VENDOR_PWHISTORY_DEFAULT_CONF
+        /*
+         * Check whether PWHISTORY_DEFAULT_CONF file is available.
+         * If it does not exist, fall back to VENDOR_PWHISTORY_DEFAULT_CONF file.
+         */
+        struct stat buffer;
+        if (stat(fname, &buffer) != 0 && errno == ENOENT) {
+            fname = VENDOR_PWHISTORY_DEFAULT_CONF;
+        }
+#endif
+    }
+
+    val = pam_modutil_search_key (pamh, fname, "debug");
+    if (val != NULL) {
+        options->debug = 1;
+        free(val);
+    }
+
+    val = pam_modutil_search_key (pamh, fname, "enforce_for_root");
+    if (val != NULL) {
+        options->enforce_for_root = 1;
+        free(val);
+    }
+
+    val = pam_modutil_search_key (pamh, fname, "remember");
+    if (val != NULL) {
+        unsigned int temp;
+        if (sscanf(val, "%u", &temp) != 1) {
+            pam_syslog(pamh, LOG_ERR,
+                "Bad number supplied for remember argument");
+        } else {
+            options->remember = temp;
+        }
+        free(val);
+    }
+
+    val = pam_modutil_search_key (pamh, fname, "retry");
+    if (val != NULL) {
+        unsigned int temp;
+        if (sscanf(val, "%u", &temp) != 1) {
+            pam_syslog(pamh, LOG_ERR,
+                "Bad number supplied for retry argument");
+        } else {
+            options->tries = temp;
+        }
+        free(val);
+    }
+
+    val = pam_modutil_search_key (pamh, fname, "file");
+    if (val != NULL) {
+        if (*val != '/') {
+            pam_syslog (pamh, LOG_ERR,
+                "File path should be absolute: %s", val);
+        } else {
+            options->filename = val;
+        }
+    }
+}