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46
INSTALL.txt
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#
# linotp-auth-pam - LinOTP PAM module
# Copyright (C) 2010 - 2017 KeyIdentity GmbH
#
# 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, either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# E-mail: linotp@keyidentity.com
# Contact: www.linotp.org
# Support: www.keyidentity.com
#
Requirements
------------
you should install libcurl4-openssl-dev.
There are issues with not trusted certificates when using libcurl4-gnutls-dev.
Compiling
---------
libtoolize
aclocal
automake --add-missing
autoconf
./configure
make
Install
-------
make install

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LICENSE
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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Makefile.am
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#
# linotp-auth-pam - LinOTP PAM module
# Copyright (C) 2010 - 2017 KeyIdentity GmbH
#
# 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, either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# E-mail: linotp@keyidentity.com
# Contact: www.linotp.org
# Support: www.keyidentity.com
#
ACLOCAL_AMFLAGS = -I m4
SUBDIRS = \
src/

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NEWS
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README
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#
# linotp-auth-pam - LinOTP PAM module
# Copyright (C) 2010 - 2017 KeyIdentity GmbH
#
# 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, either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# E-mail: linotp@keyidentity.com
# Contact: www.linotp.org
# Support: www.keyidentity.com
#
This is the LinOTP pam module, which will send the username and
password - including otp - to the LinOTP-server to verify.
Thus you can login via OTP to every service that supports pam.
copy your /etc/pam.d/common_auth to something like /etc/pam.d/linotp_auth and replace the line
auth ...... pam_unix.so
with
auth ...... pam_linotp.so
Now you can use the
@include linotp_auth
in every service you want to authenticate with OTP.
Config options to be set in the pam configuration:
url=http://localhost:5001/validate/simplecheck
nosslhostnameverify
nosslcertverify
realm=<yourRealm>
resConf=<specialResolverConfig>
Have fun.

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README.txt
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#
# linotp-auth-pam - LinOTP PAM module
# Copyright (C) 2010 - 2017 KeyIdentity GmbH
#
# 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, either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# E-mail: linotp@keyidentity.com
# Contact: www.linotp.org
# Support: www.keyidentity.com
#
This is the LinOTP pam module, which will send the username and
password - including otp - to the LinOTP-server to verify.
Thus you can login via OTP to every service that supports pam.
copy your /etc/pam.d/common_auth to something like /etc/pam.d/linotp_auth and replace the line
auth ...... pam_unix.so
with
auth ...... pam_linotp.so
Now you can use the
@include linotp_auth
in every service you want to authenticate with OTP.
Config options to be set in the pam configuration:
url=http://localhost:5001/validate/simplecheck
nosslhostnameverify
nosslcertverify
realm=<yourRealm>
resConf=<specialResolverConfig>
Have fun.

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autogen.sh
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#!/bin/sh
libtoolize || glibtoolize
aclocal
automake --add-missing
autoconf

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configure.ac
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#
# LinOTP - the open source solution for two factor authentication
# Copyright (C) 2010 - 2017 KeyIdentity GmbH
#
# This file is part of LinOTP authentication modules.
#
# 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, either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# E-mail: linotp@keyidentity.com
# Contact: www.linotp.org
# Support: www.keyidentity.com
#
# Require autoconf 2.52
AC_PREREQ(2.52)
# Process this file with autoconf to produce a configure script.
AC_INIT(pam_linotp,[2.2],[linotp@keyidentity.com])
AC_CONFIG_SRCDIR([src/pam_linotp.c])
AC_CONFIG_MACRO_DIR([m4])
AC_CANONICAL_TARGET([])
AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE
# Checks for programs.
AC_PROG_CC
AC_PROG_CXX
AC_PROG_LIBTOOL
AC_PROG_INSTALL
AC_PROG_LN_S
LT_INIT([shared])
# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([errno.h string.h syslog.h fcntl.h unistd.h security/pam_ext.h])
# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
# Checks for library functions.
AC_FUNC_MALLOC
AC_FUNC_REALLOC
AC_FUNC_STAT
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([memset strdup strerror])
AC_CHECK_FUNCS([memset_s explicit_bzero])
### AX_GCC_FUNC_ATTRIBUTE([optimize]) ###
# <Debug note="Provide more infos about local OS cappabilities...">
# This test is optional; it is used only to provide extra information about memset_s function...
AC_CHECK_DECLS([memset_s], [], [], [[
#include <errno.h>
#include <string.h>]])
# This test is optional; it is used only to provide extra information about explicit_bzero function...
AC_CHECK_DECLS([explicit_bzero], [], [], [[
#include <errno.h>
#include <string.h>]])
# </Debug>
# Check for curl
AC_PATH_PROGS(CURL_CONFIG, curl-config, no)
if test "x$CURL_CONFIG" = "xno"; then
AC_MSG_ERROR(could not locate curl libraries)
fi
CURL_LDADD=$($CURL_CONFIG --libs)
AC_SUBST(CURL_LDADD)
CURL_CFLAGS=$($CURL_CONFIG --cflags)
AC_SUBST(CURL_CFLAGS)
# Checks for libraries.
AC_CHECK_LIB(pam, pam_get_item, , AC_MSG_ERROR(could not locate pam libraries))
# Check and set OpenSSL paths
PKG_CHECK_MODULES(OPENSSL, openssl, [], [ AC_MSG_ERROR(openssl not found) ])
AC_CONFIG_FILES([
Makefile
src/Makefile
])
AC_OUTPUT

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debian/changelog vendored
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libpam-linotp (2.9.1~rc0-1) jessie; urgency=low
* Set new version 2.9.1~rc0-1
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 09 Feb 2017 16:10:40 +0100
libpam-linotp (2.9-1) jessie; urgency=low
* Set new version 2.9
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 11 Aug 2016 13:18:26 +0200
libpam-linotp (2.8.1-1) jessie; urgency=low
Enhancements:
* Major code rewrite
* Add support for custom CA certificates
* Improve compatibility with multiple Linux distributions, freeBSD and OS X
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 24 Mar 2016 13:48:11 +0100
libpam-linotp (2.8-1) jessie; urgency=low
* Set new version 2.8
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Wed, 25 Nov 2015 17:30:54 +0100
libpam-linotp (2.7.2-1~precise) precise; urgency=low
Enhancements:
* Packaging: Internal package refactorization to unify structure and version
number handling
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Wed, 25 Mar 2015 13:46:31 +0100
libpam-linotp (2.7.1-1~precise) precise; urgency=low
* Fixed the prompt configuration
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Fri, 12 Dec 2014 15:28:36 +0100
libpam-linotp (2.7.0.1-1~precise) precise; urgency=low
* Added some files that were missing for a successful build
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Wed, 02 Jul 2014 12:08:55 +0200
libpam-linotp (2.7-1~precise) precise; urgency=low
* Set new version 2.7
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Tue, 20 May 2014 18:31:52 +0200
libpam-linotp (2.6.1.1-1) precise; urgency=low
* Fix build of binary package on Launchpad
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Tue, 08 Apr 2014 15:22:03 +0200
libpam-linotp (2.6.1-1) precise; urgency=low
* Remove user check in libpam-linotp since the existence of the user is not
a prerequisite (VPN, automount) (#12429)
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 27 Mar 2014 14:19:12 +0100
libpam-linotp (2.6.0.1-2) precise; urgency=low
* Added compat level
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Tue, 13 Feb 2014 15:38:05 +0100
libpam-linotp (2.6.0.1-1) precise; urgency=low
* Set version 2.6.1-0.dev0
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Fri, 07 Feb 2014 15:38:05 +0100
libpam-linotp (2.6-1) precise; urgency=low
* Added Challenge Response functionality for all tokens.
* Added Challenge Response Policy (#12234)
* Searching for tokens in the WebUI now uses wildcards.
** To find "benjamin" you will have to search for "ben*".
** "ben" will return nothing.
* Added UserPassOnNoToken Policy (#12145)
* Export token list to csv (#2963)
* Add additional user attributes in the token list api (#12187)
* Export audit list to csv (#2963)
* Added /auth/index3 with 3 lines (#12138)
* Use Yubikey with prefix like the serial number (#12039)
* Enroll Yubikey with Challenge Response and Yubikey NEO (#12186)
* SMS-Token: The mobile number can now be used in the mailto field (#12151)
* Add non-blocking behaviour when sending SMS OTP (#2986)
* The token description can be set in the WebUI (#12163)
* The Resolver dialog now start the realm dialog if no realm is defined (#12160)
* The yubikey in Yubivo mode (with 44 characters output) is supported (#2989)
* Import Yubico CSV in Yubico mode for Yubikeys, that were generated with the
** Yubico personalization tool (#12326)
* The token type list is sorted when enrolling in the management WebUI (#12231)
* The authorize policies can contain regular expressions for the token
* Added script 'linotp-token-usage' for token statistics (#12299)
* Added severals cripts for simpler installation and maintenance:
** linotp-create-certificate, linotp-create-enckey, linotp-create-auditkeys,
** linotp-fix-access-rights (#2883)
* /validate/check can return addition token details of the authenticated token.
** Configured by the policy 'detail_on_success' (#2661)
* Support for eToken dat file import (#12124)
* Policies can now be deactivated and activated (#2903)
* Added new token type E-mail token, that sends OTP via smtp (#2704, #12332)
* Improve pam_linotp for build process and challenge response support (#12176)
* Using POST instead of GET requests in selfservice UI (#12161)
* Improved the HTML online help, to be available online from linotp.org
** or installed on the server
* Removed several misleading error messages during installation
* Improved several error messages
* rlm_linotp now also builds on Ubuntu 12.04 (#12154)
* Improved the certificate handling for the LDAP resolver (#12089)
* Improved the performance when loading many users in the WebUI (#12076)
* Fixed a padding problem in the OCRA token (#12202)
* Fixed the logout link in the management Web UI (#12022)
* Fixed SMS token without serial number (#12322)
* Fixed the signature checking in the SQL audit module (#12267, #2700)
* Fixed apache config to use secure cookies (#12148)
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Mon, 23 Dec 2013 15:19:09 +0100
libpam-linotp (2.5.2.1-1) precise; urgency=low
* Change RC8 to the release version
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Fri, 02 Aug 2013 11:28:23 +0200
libpam-linotp (2.5.2-1.rc8) lucid; urgency=low
* Fixed multiple selected policies #12114
* Fixed for user with special char for access to selfservice #12110
* Fixed export of policy with user with special chars #12107
* Fixed of missing manpage for source distribution #12100
* Fixed export of empty policies #12099
* Fixed of weird PKG-INFO from build #12098
* Fixed for ad users with special char in dn for access to selfservice #12090
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Fri, 12 Jul 2013 00:53:00 +0200
libpam-linotp (2.5.2-1.rc7) precise; urgency=low
* Fixed ignored timeStep from enrollment dialog #12080
* Fixed access for AD user with special characters to selfservice #12090
* Added required package entry for configobj in glinotpadm #12088
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Mon, 08 Jul 2013 11:33:58 +0200
libpam-linotp (2.5.2-1) precise; urgency=low
* Release commnuity edition
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Fri, 05 Jul 2013 11:56:38 +0200
libpam-linotp (2.5.2-0.rc6) precise; urgency=low
* make pam_linotp usable on MacOS
* added note about compiliation with openssl instead of gnutls
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 14 Jul 2013 16:10:58 +0200
libpam-linotp (2.5) stable; urgency=low
* changed the usage from curl/types.h to stdint.h
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 09 Dec 2011 16:10:58 +0200
libpam-linotp (2.4) stable; urgency=low
* reworked pin poliy
* Added Audit Trail etc.
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 15 Sep 2011 16:10:58 +0200
libpam-linotp (2.3-rc2) stable; urgency=low
* RC2
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Mon, 10 Mar 2011 12:00:00 +0200
libpam-linotp (2.3-pre2) stable; urgency=low
* Pre release 2
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Wed, 02 Feb 2011 12:00:00 +0200
libpam-linotp (2.2) stable; urgency=low
* Final release
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Thu, 14 Oct 2010 19:00:30 +0200
libpam-linotp (2.2-rc1) stable; urgency=low
* First RC
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Mon, 30 Sep 2010 15:00:30 +0200
libpam-linotp (2.2-pre2) stable; urgency=low
* PAM module for authenticating with LinOTP
-- LSE LinOTP2 Packaging <linotp2@lsexperts.de> Mon, 13 Sep 2010 21:00:30 +0200

1
debian/compat vendored
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7

15
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Source: libpam-linotp
Section: net
Priority: optional
Maintainer: KeyIdentity GmbH <linotp@keyidentity.com>
Build-Depends: debhelper (>=7.4.0), cdbs (>=0.4.49), libpam0g-dev, libcurl4-openssl-dev, dh-autoreconf, libssl-dev
Standards-Version: 3.9.1
Package: libpam-linotp
Architecture: amd64
Homepage: https://www.linotp.org/
Depends: ${misc:Depends}, libcurl3, ${shlibs:Depends}
Description: PAM module for one time passwords with LinOTP
This PAM moculde directly communicates to the
LinOTP server, so that there is no RADIUS
setup necessary.

29
debian/rules vendored
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#!/usr/bin/make -f
# -*- makefile -*-
#%:
# dh $@
#
#include /usr/share/cdbs/1/class/autotools.mk
#include /usr/share/cdbs/1/rules/debhelper.mk
#include /usr/share/cdbs/1/class/cmake.mk #Cmake stuff
#
#DEB_CONFIGURE_EXTRA_FLAGS := --libdir=/lib
#%:
#dh $@
export DH_VERBOSE=1
#%:
# dh $@
DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
CONFIGURE_EXTRA_FLAGS += --libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH)
%:
dh $@ --with autoreconf
override_dh_auto_configure:
dh_auto_configure -- $(CONFIGURE_EXTRA_FLAGS)

43
src/Makefile.am
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#
# linotp-auth-pam - LinOTP PAM module
# Copyright (C) 2010 - 2017 KeyIdentity GmbH
#
# 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, either version 2 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# E-mail: linotp@keyidentity.com
# Contact: www.linotp.org
# Support: www.keyidentity.com
#
# Process this file with automake to create Makefile.in
MAINTAINERCLEANFILES = Makefile.in
AM_CFLAGS = -Wall -fPIC $(CURL_CFLAGS)
AM_LDFLAGS = -module -avoid-version
lib_LTLIBRARIES = pam_linotp.la
pam_linotp_la_SOURCES = pam_linotp.c zeromem.c
pam_linotp_la_LIBADD = $(OPENSSL_LIBS) $(CURL_LDADD)
install:
$(mkinstalldirs) $(DESTDIR)/$(libdir)/security
$(INSTALL) $(top_builddir)/src/.libs/pam_linotp.so $(DESTDIR)/$(libdir)/security
uninstall:
$(RM) $(DESTDIR)/$(libdir)/security/pam_linotp.so
@ rmdir $(DESTDIR)/$(libdir)/security

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65
src/zeromem.c
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/*
* linotp-auth-pam - LinOTP PAM module
* Copyright (C) 2010 - 2017 KeyIdentity GmbH
*
* 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, either version 2 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* E-mail: linotp@keyidentity.com
* Contact: www.linotp.org
* Support: www.keyidentity.com
*/
#include <stdio.h>
#include <stdint.h>
#include "zeromem.h" // beinhaltet auch #include <errno.h> und <string.h>
#if !(defined(HAVE_MEMSET_S) && HAVE_MEMSET_S==1)
/* protect memset_s from compiler optimization */
// some compilers have support for: __attribute__((optimize("O0")))
int memset_s(void *s, size_t smax, int c, size_t n) {
int err = 0;
if (s == NULL) {
return EINVAL;
}
if (smax > SIZE_MAX) {
return E2BIG;
}
if (n > SIZE_MAX) {
err = E2BIG;
n = smax;
}
if (n > smax) {
err = EOVERFLOW;
n = smax;
}
volatile unsigned char *p = (unsigned char*)s;
while (n-- > 0)
*p++ = (unsigned char)c;
return err;
}
#endif // HAVE_MEMSET_S
#if __SECURE_ZEROMEM==0
void secure_zeromem(void *b, size_t n) {
volatile unsigned char *p = (unsigned char*)b;
while (n-- > 0)
*p++ = 0;
}
#endif

90
src/zeromem.h
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/*
* linotp-auth-pam - LinOTP PAM module
* Copyright (C) 2010 - 2017 KeyIdentity GmbH
*
* 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, either version 2 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* E-mail: linotp@keyidentity.com
* Contact: www.linotp.org
* Support: www.keyidentity.com
*/
/** #pragma once **/
#ifndef __zeromem__h
#define __zeromem__h
#include <errno.h> // include memset_s errors
#include <string.h> // include original definition of memset_s or explicit_bzero
#include <stddef.h> // include declaration of size_t
// By default, we do not have a better replacement for function "secure_zeromem"...
#define __SECURE_ZEROMEM 0
// Define function attribute which will disable call optimizations...
#if defined(HAVE_FUNC_ATTRIBUTE_OPTIMIZE) && HAVE_FUNC_ATTRIBUTE_OPTIMIZE==1
#define __GCC_NO_OPTIMIZE __attribute__((optimize("O0")))
#else
#define __GCC_NO_OPTIMIZE
#endif
/*
* The function "explicit_bzero(void *s, rsize_t)" exists on Free BSD
* based operating systems
*/
#if defined(HAVE_EXPLICIT_BZERO) && HAVE_EXPLICIT_BZERO==1 // "explicit_bzero" defined...
#if __SECURE_ZEROMEM==0
// instead of "secure_zeromem", we should use "explicit_bzero"...
inline void secure_zeromem(void *buffer, size_t size) {
explicit_bzero(buffer, size);
}
#undef __SECURE_ZEROMEM
#define __SECURE_ZEROMEM 1
#endif // __SECURE_ZEROMEM
#endif // HAVE_EXPLICIT_BZERO
/*
* The function "memset_s(void *s, rsize_t, int, rsize_t)" exists on Mac OS X
* based operating systems, or in C11
*/
#if defined(HAVE_MEMSET_S) && HAVE_MEMSET_S==1 // "memset_s" defined...
#if __SECURE_ZEROMEM==0
// instead of "secure_zeromem", we should use "memset_s"...
inline void secure_zeromem(void *buffer, size_t size) {
memset_s(buffer, size, 0, size);
}
#undef __SECURE_ZEROMEM
#define __SECURE_ZEROMEM 1
#endif // __SECURE_ZEROMEM
#else // memset_s
// When "memset_s" is not available, then define our own version...
int __GCC_NO_OPTIMIZE memset_s(void *s, size_t smax, int c, size_t n);
#endif // memset_s
#if __SECURE_ZEROMEM==0
// there is not better replacement for function "secure_zeromem", declare new...
void __GCC_NO_OPTIMIZE secure_zeromem(void *b, size_t n);
#endif
#define blow(buffer, size) secure_zeromem(buffer, size)
#endif // __zeromem__h
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