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-rw-r--r--src/plugins/Makefile.in700
-rw-r--r--src/plugins/auth-pam/Makefile.in784
-rw-r--r--src/plugins/auth-pam/README.auth-pam54
-rw-r--r--src/plugins/auth-pam/auth-pam.c251
-rw-r--r--src/plugins/auth-pam/utils.h6
-rw-r--r--src/plugins/down-root/Makefile.in770
6 files changed, 274 insertions, 2291 deletions
diff --git a/src/plugins/Makefile.in b/src/plugins/Makefile.in
deleted file mode 100644
index 739191b..0000000
--- a/src/plugins/Makefile.in
+++ /dev/null
@@ -1,700 +0,0 @@
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diff --git a/src/plugins/auth-pam/Makefile.in b/src/plugins/auth-pam/Makefile.in
deleted file mode 100644
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-.PRECIOUS: Makefile
-
-
-# Tell versions [3.59,3.63) of GNU make to not export all variables.
-# Otherwise a system limit (for SysV at least) may be exceeded.
-.NOEXPORT:
diff --git a/src/plugins/auth-pam/README.auth-pam b/src/plugins/auth-pam/README.auth-pam
index e123690..e3ca027 100644
--- a/src/plugins/auth-pam/README.auth-pam
+++ b/src/plugins/auth-pam/README.auth-pam
@@ -7,7 +7,7 @@ authentication via PAM, and essentially allows any authentication
method supported by PAM (such as LDAP, RADIUS, or Linux Shadow
passwords) to be used with OpenVPN. While PAM supports
username/password authentication, this can be combined with X509
-certificates to provide two indepedent levels of authentication.
+certificates to provide two independent levels of authentication.
This module uses a split privilege execution model which will
function even if you drop openvpn daemon privileges using the user,
@@ -36,19 +36,20 @@ pairs to answer PAM module queries.
For example:
- plugin openvpn-auth-pam.so "login login USERNAME password PASSWORD"
+ plugin openvpn-auth-pam.so "login login USERNAME password PASSWORD pin OTP"
tells auth-pam to (a) use the "login" PAM module, (b) answer a
-"login" query with the username given by the OpenVPN client, and
-(c) answer a "password" query with the password given by the
-OpenVPN client. This provides flexibility in dealing with the different
+"login" query with the username given by the OpenVPN client,
+(c) answer a "password" query with the password, and (d) answer a
+"pin" query with the OTP given by the OpenVPN client.
+This provides flexibility in dealing with different
types of query strings which different PAM modules might generate.
For example, suppose you were using a PAM module called
"test" which queried for "name" rather than "login":
plugin openvpn-auth-pam.so "test name USERNAME password PASSWORD"
-While "USERNAME" "COMMONNAME" and "PASSWORD" are special strings which substitute
+While "USERNAME" "COMMONNAME" "PASSWORD" and "OTP" are special strings which substitute
to client-supplied values, it is also possible to name literal values
to use as PAM module query responses. For example, suppose that the
login module queried for a third parameter, "domain" which
@@ -59,8 +60,12 @@ is to be answered with the constant value "mydomain.com":
The following OpenVPN directives can also influence
the operation of this plugin:
- client-cert-not-required
+ verify-client-cert none
username-as-common-name
+ static-challenge
+
+Use of --static challenege is required to pass a pin (represented by "OTP" in
+parameter substitution) or a second password.
Run OpenVPN with --verb 7 or higher to get debugging output from
this plugin, including the list of queries presented by the
@@ -68,6 +73,41 @@ underlying PAM module. This is a useful debugging tool to figure
out which queries a given PAM module is making, so that you can
craft the appropriate plugin directive to answer it.
+Since running OpenVPN with verb 7 is quite verbose, alternatively
+you can put
+
+ verb 3
+ setenv verb 9
+
+in the openvpn config which will only increase logging for this plugin.
+
+
+ASYNCHRONOUS OPERATION
+
+Sometimes PAM modules take very long to complete (for example, a LDAP
+or Radius query might timeout trying to connect an unreachable external
+server). Normal plugin auth operation will block the whole OpenVPN
+process in this time, that is, all forwarding for all other clients stops.
+
+The auth-pam plugin can operate asynchronously ("deferred authentication")
+to remedy this situation. To enable this, put
+
+ setenv deferred_auth_pam 1
+
+in your openvpn server config. If set, this will make the "PAM background
+process" fork() and do its job detached from OpenVPN. When finished, a
+status file is written, which OpenVPN will then pick up and read the
+success/failure result from it.
+
+While the plugin is working in the background, OpenVPN will continue to
+service other clients normally.
+
+Asynchronous operation is recommended for all PAM queries that could
+"take time" (LDAP, Radius, NIS, ...). If only local files are queried
+(passwd, pam_userdb, ...), synchronous operation has slightly lower
+overhead, so this is still the default mode of operation.
+
+
CAVEATS
This module will only work on *nix systems which support PAM,
diff --git a/src/plugins/auth-pam/auth-pam.c b/src/plugins/auth-pam/auth-pam.c
index 5ba4dc4..f537652 100644
--- a/src/plugins/auth-pam/auth-pam.c
+++ b/src/plugins/auth-pam/auth-pam.c
@@ -6,6 +6,7 @@
* packet compression.
*
* Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>
+ * Copyright (C) 2016-2018 Selva Nair <selva.nair@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
@@ -61,9 +62,15 @@
#define RESPONSE_INIT_FAILED 11
#define RESPONSE_VERIFY_SUCCEEDED 12
#define RESPONSE_VERIFY_FAILED 13
+#define RESPONSE_DEFER 14
/* Pointers to functions exported from openvpn */
+static plugin_log_t plugin_log = NULL;
static plugin_secure_memzero_t plugin_secure_memzero = NULL;
+static plugin_base64_decode_t plugin_base64_decode = NULL;
+
+/* module name for plugin_log() */
+static char *MODULE = "AUTH-PAM";
/*
* Plugin state, used by foreground
@@ -87,6 +94,7 @@ struct auth_pam_context
* "USERNAME" -- substitute client-supplied username
* "PASSWORD" -- substitute client-specified password
* "COMMONNAME" -- substitute client certificate common name
+ * "OTP" -- substitute static challenge response if available
*/
#define N_NAME_VALUE 16
@@ -111,6 +119,7 @@ struct user_pass {
char username[128];
char password[128];
char common_name[128];
+ char response[128];
const struct name_value_list *name_value_list;
};
@@ -207,7 +216,7 @@ daemonize(const char *envp[])
}
if (daemon(0, 0) < 0)
{
- fprintf(stderr, "AUTH-PAM: daemonization failed\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "daemonization failed");
}
else if (fd >= 3)
{
@@ -276,6 +285,66 @@ name_value_match(const char *query, const char *match)
return strncasecmp(match, query, strlen(match)) == 0;
}
+/*
+ * Split and decode up->password in the form SCRV1:base64_pass:base64_response
+ * into pass and response and save in up->password and up->response.
+ * If the password is not in the expected format, input is not changed.
+ */
+static void
+split_scrv1_password(struct user_pass *up)
+{
+ const int skip = strlen("SCRV1:");
+ if (strncmp(up->password, "SCRV1:", skip) != 0)
+ {
+ return;
+ }
+
+ char *tmp = strdup(up->password);
+ if (!tmp)
+ {
+ plugin_log(PLOG_ERR, MODULE, "out of memory parsing static challenge password");
+ goto out;
+ }
+
+ char *pass = tmp + skip;
+ char *resp = strchr(pass, ':');
+ if (!resp) /* string not in SCRV1:xx:yy format */
+ {
+ goto out;
+ }
+ *resp++ = '\0';
+
+ int n = plugin_base64_decode(pass, up->password, sizeof(up->password)-1);
+ if (n >= 0)
+ {
+ up->password[n] = '\0';
+ n = plugin_base64_decode(resp, up->response, sizeof(up->response)-1);
+ if (n >= 0)
+ {
+ up->response[n] = '\0';
+ if (DEBUG(up->verb))
+ {
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: parsed static challenge password");
+ }
+ goto out;
+ }
+ }
+
+ /* decode error: reinstate original value of up->password and return */
+ plugin_secure_memzero(up->password, sizeof(up->password));
+ plugin_secure_memzero(up->response, sizeof(up->response));
+ strcpy(up->password, tmp); /* tmp is guaranteed to fit in up->password */
+
+ plugin_log(PLOG_ERR, MODULE, "base64 decode error while parsing static challenge password");
+
+out:
+ if (tmp)
+ {
+ plugin_secure_memzero(tmp, strlen(tmp));
+ free(tmp);
+ }
+}
+
OPENVPN_EXPORT int
openvpn_plugin_open_v3(const int v3structver,
struct openvpn_plugin_args_open_in const *args,
@@ -315,7 +384,9 @@ openvpn_plugin_open_v3(const int v3structver,
ret->type_mask = OPENVPN_PLUGIN_MASK(OPENVPN_PLUGIN_AUTH_USER_PASS_VERIFY);
/* Save global pointers to functions exported from openvpn */
+ plugin_log = args->callbacks->plugin_log;
plugin_secure_memzero = args->callbacks->plugin_secure_memzero;
+ plugin_base64_decode = args->callbacks->plugin_base64_decode;
/*
* Make sure we have two string arguments: the first is the .so name,
@@ -323,7 +394,7 @@ openvpn_plugin_open_v3(const int v3structver,
*/
if (string_array_len(argv) < base_parms)
{
- fprintf(stderr, "AUTH-PAM: need PAM service parameter\n");
+ plugin_log(PLOG_ERR, MODULE, "need PAM service parameter");
goto error;
}
@@ -339,7 +410,7 @@ openvpn_plugin_open_v3(const int v3structver,
if ((nv_len & 1) == 1 || (nv_len / 2) > N_NAME_VALUE)
{
- fprintf(stderr, "AUTH-PAM: bad name/value list length\n");
+ plugin_log(PLOG_ERR, MODULE, "bad name/value list length");
goto error;
}
@@ -369,7 +440,7 @@ openvpn_plugin_open_v3(const int v3structver,
*/
if (socketpair(PF_UNIX, SOCK_DGRAM, 0, fd) == -1)
{
- fprintf(stderr, "AUTH-PAM: socketpair call failed\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "socketpair call failed");
goto error;
}
@@ -395,7 +466,7 @@ openvpn_plugin_open_v3(const int v3structver,
/* don't let future subprocesses inherit child socket */
if (fcntl(fd[0], F_SETFD, FD_CLOEXEC) < 0)
{
- fprintf(stderr, "AUTH-PAM: Set FD_CLOEXEC flag on socket file descriptor failed\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "Set FD_CLOEXEC flag on socket file descriptor failed");
}
/* wait for background child process to initialize */
@@ -404,6 +475,7 @@ openvpn_plugin_open_v3(const int v3structver,
{
context->foreground_fd = fd[0];
ret->handle = (openvpn_plugin_handle_t *) context;
+ plugin_log( PLOG_NOTE, MODULE, "initialization succeeded (fg)" );
return OPENVPN_PLUGIN_FUNC_SUCCESS;
}
}
@@ -453,14 +525,33 @@ openvpn_plugin_func_v1(openvpn_plugin_handle_t handle, const int type, const cha
const char *password = get_env("password", envp);
const char *common_name = get_env("common_name", envp) ? get_env("common_name", envp) : "";
+ /* should we do deferred auth?
+ * yes, if there is "auth_control_file" and "deferred_auth_pam" env
+ */
+ const char *auth_control_file = get_env("auth_control_file", envp);
+ const char *deferred_auth_pam = get_env("deferred_auth_pam", envp);
+ if (auth_control_file != NULL && deferred_auth_pam != NULL)
+ {
+ if (DEBUG(context->verb))
+ {
+ plugin_log(PLOG_NOTE, MODULE, "do deferred auth '%s'",
+ auth_control_file);
+ }
+ }
+ else
+ {
+ auth_control_file = "";
+ }
+
if (username && strlen(username) > 0 && password)
{
if (send_control(context->foreground_fd, COMMAND_VERIFY) == -1
|| send_string(context->foreground_fd, username) == -1
|| send_string(context->foreground_fd, password) == -1
- || send_string(context->foreground_fd, common_name) == -1)
+ || send_string(context->foreground_fd, common_name) == -1
+ || send_string(context->foreground_fd, auth_control_file) == -1)
{
- fprintf(stderr, "AUTH-PAM: Error sending auth info to background process\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "Error sending auth info to background process");
}
else
{
@@ -469,9 +560,17 @@ openvpn_plugin_func_v1(openvpn_plugin_handle_t handle, const int type, const cha
{
return OPENVPN_PLUGIN_FUNC_SUCCESS;
}
+ if (status == RESPONSE_DEFER)
+ {
+ if (DEBUG(context->verb))
+ {
+ plugin_log(PLOG_NOTE, MODULE, "deferred authentication");
+ }
+ return OPENVPN_PLUGIN_FUNC_DEFERRED;
+ }
if (status == -1)
{
- fprintf(stderr, "AUTH-PAM: Error receiving auth confirmation from background process\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "Error receiving auth confirmation from background process");
}
}
}
@@ -486,7 +585,7 @@ openvpn_plugin_close_v1(openvpn_plugin_handle_t handle)
if (DEBUG(context->verb))
{
- fprintf(stderr, "AUTH-PAM: close\n");
+ plugin_log(PLOG_NOTE, MODULE, "close");
}
if (context->foreground_fd >= 0)
@@ -494,7 +593,7 @@ openvpn_plugin_close_v1(openvpn_plugin_handle_t handle)
/* tell background process to exit */
if (send_control(context->foreground_fd, COMMAND_EXIT) == -1)
{
- fprintf(stderr, "AUTH-PAM: Error signaling background process to exit\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "Error signaling background process to exit");
}
/* wait for background process to exit */
@@ -556,7 +655,7 @@ my_conv(int n, const struct pam_message **msg_array,
if (DEBUG(up->verb))
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: my_conv[%d] query='%s' style=%d\n",
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: my_conv[%d] query='%s' style=%d",
i,
msg->msg ? msg->msg : "NULL",
msg->msg_style);
@@ -581,7 +680,7 @@ my_conv(int n, const struct pam_message **msg_array,
if (DEBUG(up->verb))
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: name match found, query/match-string ['%s', '%s'] = '%s'\n",
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: name match found, query/match-string ['%s', '%s'] = '%s'",
msg->msg,
match_name,
match_value);
@@ -599,6 +698,10 @@ my_conv(int n, const struct pam_message **msg_array,
{
aresp[i].resp = searchandreplace(match_value, "COMMONNAME", up->common_name);
}
+ else if (strstr(match_value, "OTP"))
+ {
+ aresp[i].resp = searchandreplace(match_value, "OTP", up->response);
+ }
else
{
aresp[i].resp = strdup(match_value);
@@ -695,7 +798,7 @@ pam_auth(const char *service, const struct user_pass *up)
/* Output error message if failed */
if (!ret)
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: user '%s' failed to authenticate: %s\n",
+ plugin_log(PLOG_ERR, MODULE, "BACKGROUND: user '%s' failed to authenticate: %s",
up->username,
pam_strerror(pamh, status));
}
@@ -708,12 +811,87 @@ pam_auth(const char *service, const struct user_pass *up)
}
/*
+ * deferred auth handler
+ * - fork() (twice, to avoid the need for async wait / SIGCHLD handling)
+ * - query PAM stack via pam_auth()
+ * - send response back to OpenVPN via "ac_file_name"
+ *
+ * parent process returns "0" for "fork() and wait() succeeded",
+ * "-1" for "something went wrong, abort program"
+ */
+
+static void
+do_deferred_pam_auth(int fd, const char *ac_file_name,
+ const char *service, const struct user_pass *up)
+{
+ if (send_control(fd, RESPONSE_DEFER) == -1)
+ {
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: write error on response socket [4]");
+ return;
+ }
+
+ /* double forking so we do not need to wait() for async auth kids */
+ pid_t p1 = fork();
+
+ if (p1 < 0)
+ {
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: fork(1) failed");
+ return;
+ }
+ if (p1 != 0) /* parent */
+ {
+ waitpid(p1, NULL, 0);
+ return; /* parent's job succeeded */
+ }
+
+ /* child */
+ close(fd); /* socketpair no longer needed */
+
+ pid_t p2 = fork();
+ if (p2 < 0)
+ {
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: fork(2) failed");
+ exit(1);
+ }
+
+ if (p2 != 0) /* new parent: exit right away */
+ {
+ exit(0);
+ }
+
+ /* grandchild */
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: deferred auth for '%s', pid=%d",
+ up->username, (int) getpid() );
+
+ /* the rest is very simple: do PAM, write status byte to file, done */
+ int ac_fd = open( ac_file_name, O_WRONLY );
+ if (ac_fd < 0)
+ {
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "cannot open '%s' for writing",
+ ac_file_name );
+ exit(1);
+ }
+ int pam_success = pam_auth(service, up);
+
+ if (write( ac_fd, pam_success ? "1" : "0", 1 ) != 1)
+ {
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "cannot write to '%s'",
+ ac_file_name );
+ }
+ close(ac_fd);
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: %s: deferred auth: PAM %s",
+ up->username, pam_success ? "succeeded" : "rejected" );
+ exit(0);
+}
+
+/*
* Background process -- runs with privilege.
*/
static void
pam_server(int fd, const char *service, int verb, const struct name_value_list *name_value_list)
{
struct user_pass up;
+ char ac_file_name[PATH_MAX];
int command;
#ifdef USE_PAM_DLOPEN
static const char pam_so[] = "libpam.so";
@@ -724,7 +902,7 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
*/
if (DEBUG(verb))
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: INIT service='%s'\n", service);
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: INIT service='%s'", service);
}
#ifdef USE_PAM_DLOPEN
@@ -733,7 +911,7 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
*/
if (!dlopen_pam(pam_so))
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: could not load PAM lib %s: %s\n", pam_so, dlerror());
+ plugin_log(PLOG_ERR, MODULE, "BACKGROUND: could not load PAM lib %s: %s", pam_so, dlerror());
send_control(fd, RESPONSE_INIT_FAILED);
goto done;
}
@@ -744,10 +922,12 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
*/
if (send_control(fd, RESPONSE_INIT_SUCCEEDED) == -1)
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: write error on response socket [1]\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: write error on response socket [1]");
goto done;
}
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: initialization succeeded");
+
/*
* Event loop
*/
@@ -762,7 +942,7 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
if (DEBUG(verb))
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: received command code: %d\n", command);
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: received command code: %d", command);
}
switch (command)
@@ -770,9 +950,10 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
case COMMAND_VERIFY:
if (recv_string(fd, up.username, sizeof(up.username)) == -1
|| recv_string(fd, up.password, sizeof(up.password)) == -1
- || recv_string(fd, up.common_name, sizeof(up.common_name)) == -1)
+ || recv_string(fd, up.common_name, sizeof(up.common_name)) == -1
+ || recv_string(fd, ac_file_name, sizeof(ac_file_name)) == -1)
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: read error on command channel: code=%d, exiting\n",
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: read error on command channel: code=%d, exiting",
command);
goto done;
}
@@ -780,18 +961,33 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
if (DEBUG(verb))
{
#if 0
- fprintf(stderr, "AUTH-PAM: BACKGROUND: USER/PASS: %s/%s\n",
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: USER/PASS: %s/%s",
up.username, up.password);
#else
- fprintf(stderr, "AUTH-PAM: BACKGROUND: USER: %s\n", up.username);
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: USER: %s", up.username);
#endif
}
+ /* If password is of the form SCRV1:base64:base64 split it up */
+ split_scrv1_password(&up);
+
+ /* client wants deferred auth
+ */
+ if (strlen(ac_file_name) > 0)
+ {
+ do_deferred_pam_auth(fd, ac_file_name, service, &up);
+ break;
+ }
+
+
+ /* non-deferred auth: wait for pam result and send
+ * result back via control socketpair
+ */
if (pam_auth(service, &up)) /* Succeeded */
{
if (send_control(fd, RESPONSE_VERIFY_SUCCEEDED) == -1)
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: write error on response socket [2]\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: write error on response socket [2]");
goto done;
}
}
@@ -799,7 +995,7 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
{
if (send_control(fd, RESPONSE_VERIFY_FAILED) == -1)
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: write error on response socket [3]\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: write error on response socket [3]");
goto done;
}
}
@@ -810,24 +1006,25 @@ pam_server(int fd, const char *service, int verb, const struct name_value_list *
goto done;
case -1:
- fprintf(stderr, "AUTH-PAM: BACKGROUND: read error on command channel\n");
+ plugin_log(PLOG_ERR|PLOG_ERRNO, MODULE, "BACKGROUND: read error on command channel");
goto done;
default:
- fprintf(stderr, "AUTH-PAM: BACKGROUND: unknown command code: code=%d, exiting\n",
+ plugin_log(PLOG_ERR, MODULE, "BACKGROUND: unknown command code: code=%d, exiting",
command);
goto done;
}
+ plugin_secure_memzero(up.response, sizeof(up.response));
}
done:
-
plugin_secure_memzero(up.password, sizeof(up.password));
+ plugin_secure_memzero(up.response, sizeof(up.response));
#ifdef USE_PAM_DLOPEN
dlclose_pam();
#endif
if (DEBUG(verb))
{
- fprintf(stderr, "AUTH-PAM: BACKGROUND: EXIT\n");
+ plugin_log(PLOG_NOTE, MODULE, "BACKGROUND: EXIT");
}
return;
diff --git a/src/plugins/auth-pam/utils.h b/src/plugins/auth-pam/utils.h
index 90fff66..c876dcc 100644
--- a/src/plugins/auth-pam/utils.h
+++ b/src/plugins/auth-pam/utils.h
@@ -25,7 +25,7 @@
#define _PLUGIN_AUTH_PAM_UTILS__H
/**
- * Read 'tosearch', replace all occurences of 'searchfor' with 'replacewith' and return
+ * Read 'tosearch', replace all occurrences of 'searchfor' with 'replacewith' and return
* a pointer to the NEW string. Does not modify the input strings. Will not enter an
* infinite loop with clever 'searchfor' and 'replacewith' strings.
*
@@ -35,7 +35,7 @@
* @param searchfor needle to search for in the haystack
* @param replacewith when a match is found, replace needle with this string
*
- * @return Retuns NULL when any parameter is NULL or the worst-case result is to large ( >= SIZE_MAX).
+ * @return Returns NULL when any parameter is NULL or the worst-case result is to large ( >= SIZE_MAX).
* Otherwise it returns a pointer to a new buffer containing the modified input
*/
char *
@@ -48,7 +48,7 @@ searchandreplace(const char *tosearch, const char *searchfor, const char *replac
* @param name Environment variable to look up
* @param envp Environment variable table with all key/value pairs
*
- * @return Returns a pointer to the value of the enviroment variable if found, otherwise NULL is returned.
+ * @return Returns a pointer to the value of the environment variable if found, otherwise NULL is returned.
*/
const char *
get_env(const char *name, const char *envp[]);
diff --git a/src/plugins/down-root/Makefile.in b/src/plugins/down-root/Makefile.in
deleted file mode 100644
index 299a791..0000000
--- a/src/plugins/down-root/Makefile.in
+++ /dev/null
@@ -1,770 +0,0 @@
-# Makefile.in generated by automake 1.16.1 from Makefile.am.
-# @configure_input@
-
-# Copyright (C) 1994-2018 Free Software Foundation, Inc.
-
-# This Makefile.in is free software; the Free Software Foundation
-# gives unlimited permission to copy and/or distribute it,
-# with or without modifications, as long as this notice is preserved.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
-# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
-# PARTICULAR PURPOSE.
-
-@SET_MAKE@
-
-#
-# OpenVPN (TM) Down Root Plugin -- OpenVPN Plugin
-#
-# Copyright (C) 2012 Alon Bar-Lev <alon.barlev@gmail.com>
-#
-
-
-VPATH = @srcdir@
-am__is_gnu_make = { \
- if test -z '$(MAKELEVEL)'; then \
- false; \
- elif test -n '$(MAKE_HOST)'; then \
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- elif test -n '$(MAKE_VERSION)' && test -n '$(CURDIR)'; then \
- true; \
- else \
- false; \
- fi; \
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-am__make_running_with_option = \
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- skip_next=no; \
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- test $$has_opt = yes
-am__make_dryrun = (target_option=n; $(am__make_running_with_option))
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-am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
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-mkinstalldirs = $(install_sh) -d
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