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IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # `make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... 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And that's why this exists. It's an implementation of the HOTP protocol in the form of a PAM module. Basically, in addition to a normal password, users are also assigned a 128 bit key and arbitrary-length PIN number. Every time you'd like to login using a OTP, you calculate a secure hash based on your assigned PIN and an increasing counter, the result of which is a six character one time password. While this module could be used in conjunction with many different client devices, it was written specifically with Android devices in mind. There is companion software which runs on Android, so that your phone essentially becomes a SecureID token. All you need to do is open up the software, type in your PIN, and you get back a 6-character number that you can use to login to your system. .SH MODULE TYPES PROVIDED Only the .BR auth type is provided. .SH EXAMPLES .TP Add the following line to /etc/pam.d/login to HOTP style login: auth sufficient pam_barada.so .SH "SEE ALSO" .BR barada-add (8), .BR pam.conf (5) .TP RFC 4226 - HOTP: An HMAC-Based One-Time Password Algorithm http://www.rfc-editor.org/rfc/rfc4226.txt barada-pam-0.5.3/missing0000755000175200017520000002415211761724625012047 00000000000000#! /bin/sh # Common stub for a few missing GNU programs while installing. scriptversion=2012-01-06.13; # UTC # Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006, # 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. # Originally by Fran,cois Pinard , 1996. # 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, 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. 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You may also peek at any GNU archive site, in case some other package would contain this missing \`$1' program." exit 1 ;; esac exit 0 # Local variables: # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: barada-pam-0.5.3/AUTHORS0000644000175200017520000000025511762416600011506 00000000000000Original Code 2008 - 2010 Moxie Marlinspike Stuart Anderson Current Maintainer 2012 onward Basil North barada-pam-0.5.3/README0000644000175200017520000000512711761714660011327 00000000000000 This PAM module is designed to provide two-factor authentication support, based on an algorithm outlined in RFC 4226 known as HOTP. The basic problem is this: one might occasionally find it necessary to access email or get a remote shell from a computer that is one's own. The problem, however, is that it's often unwise to trust computers that are not your own. This is particularly true for public computers at libraries or internet cafes, which are a tempting option when traveling. There are solutions for this, of course. The two obvious choices are a One Time Password system (like S/Key or OTPW) or a Two Factor Authentication system (like RSA SecureID or CryptoCard). I prefer Two Factor Authentication. What I don't like about OTP is that you have to carry a list of passwords around with you, that there can be logistical problems if you get to the end of your list while you're still traveling, and that you have to type your constant "prefix" password into untrusted computers. What I like about Two Factor Authentication is that you have the security of two factors (something you have and something you know) and that it solves the keystroke logging problem in a more convenient way (no lists, no out of date information, no typing of anything but a temporary access code into untrusted computers). Ironically, then, the problem with SecureID or CryptoCard is that they're not convenient. They cost money to license, the hardware costs money, and they're difficult to maintain. You have to setup a dedicated Solaris machine with RADIUS support just to deploy SecureID, which isn't really great for someone with a small setup. And that's why this exists. It's an implementation of the HOTP protocol in the form of a PAM module. Basically, in addition to a normal password, users are also assigned a 128 bit key and arbitrary-length PIN number. Every time you'd like to login using a OTP, you calculate a secure hash based on your assigned PIN and an increasing counter, the result of which is a six character one time password. This module goes above the normal authentication module in the PAM stack, so at any moment you can either use your normal password or a OTP interchangeably. While this module could be used in conjunction with many different client devices, it was written specifically with Android devices in mind. There is companion software which runs on Android, so that your phone essentially becomes a SecureID token. 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"$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-end: "$" # End: barada-pam-0.5.3/src/0000755000175200017520000000000011763346323011310 500000000000000barada-pam-0.5.3/src/HOTPCredentials.h0000644000175200017520000000323011761714660014330 00000000000000/* * Copyright (c) 2008-2010 Moxie Marlinspike * * 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 3 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #ifndef __HOTP_CREDENTIALS_H__ #define __HOTP_CREDENTIALS_H__ #include #include #include #include using namespace std; #define KEY_SIZE 16 class HOTPCredentials { private: const pam_handle_t *pamh; unsigned char key[KEY_SIZE]; uint32_t pin; uint64_t counter; void loadCounter(const string &path); void loadKey(const string &path); void loadPin(const string &path); void serializePin(const string &path); void serializeKey(const string &path); public: HOTPCredentials(uint64_t counter, uint32_t pin, unsigned char *key); HOTPCredentials(const pam_handle_t *pamh, const string &path); void setCounter(uint64_t counter); void serializeCounter(const string &path); void serialize(const string &path); uint64_t getCounter(); uint32_t getPin(); const unsigned char* getKey(); uint32_t getKeyLength(); }; #endif barada-pam-0.5.3/src/Util.cpp0000644000175200017520000000463211761714660012657 00000000000000/* * Copyright (c) 2008-2010 Moxie Marlinspike * * 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 3 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #include "Util.h" #include #include #include #include #include #include #include #undef DEBUG void Util::int64ToArrayBigEndian(unsigned char *a, uint64_t i) { a[0] = (i >> 56) & 0xFF; a[1] = (i >> 48) & 0xFF; a[2] = (i >> 40) & 0xFF; a[3] = (i >> 32) & 0xFF; a[4] = (i >> 24) & 0xFF; a[5] = (i >> 16) & 0xFF; a[6] = (i >> 8) & 0xFF; a[7] = i & 0xFF; } void Util::int32ToArrayBigEndian(unsigned char *a, uint32_t i) { a[0] = (i >> 24) & 0xFF; a[1] = (i >> 16) & 0xFF; a[2] = (i >> 8) & 0xFF; a[3] = i & 0xFF; } void Util::hexDump(const pam_handle_t *pamh, unsigned char *buf, int length) { char *output = (char*)malloc((length * 3) + 1); int i; for (i=0;i #include #include #include #include #include #include #include #include "HOTPCredentials.h" #include "HOTPWindow.h" #define DEFAULT_PATH "/etc/barada.d/" #undef DEBUG using namespace std; using namespace boost; static int need_username (pam_handle_t *pamh, char **name) { const void *void_name; int retval; retval = pam_get_item(pamh, PAM_USER, &void_name); if (retval != PAM_SUCCESS || void_name == NULL) { return 1; } else { *name = strdup((char*)void_name); return 0; } } static int need_password (pam_handle_t *pamh, char **password) { const void *void_pass; int retval; retval = pam_get_item (pamh, PAM_AUTHTOK, &void_pass); if (retval != PAM_SUCCESS || void_pass == NULL) { return 1; } *password = strdup((char*)void_pass); return 0; } static string getLogin(pam_handle_t *pamh) { char *login=NULL; if (need_username(pamh, &login)) { pam_prompt(pamh, PAM_PROMPT_ECHO_ON, &login, "login: "); } if (login != NULL) { pam_set_item(pamh, PAM_USER, login); string loginString(login); free(login); return loginString; } return ""; } static uint32_t getPasscode(pam_handle_t *pamh) { char *password=NULL; if (need_password(pamh, &password)) { pam_prompt(pamh, PAM_PROMPT_ECHO_OFF, &password, "Password: "); } if (password != NULL) { pam_set_item(pamh, PAM_AUTHTOK, password); string passwordString(password); free(password); try { return lexical_cast(passwordString); } catch (bad_lexical_cast &exception) { return 0; } } return 0; } int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv) { string login; uint32_t passcode; uint64_t counter; if ((login = getLogin(pamh)) == "") { #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "HOTP: Unable To Get Login..."); #endif return PAM_USER_UNKNOWN; } else if (login == "..") { return PAM_USER_UNKNOWN; } #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, ("Got Login: " + login).c_str()); #endif if ((passcode = getPasscode(pamh)) == 0) { #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "HOTP: Unable To Get Passcode..."); #endif return PAM_AUTH_ERR; } #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "Got Passcode: %d", passcode); #endif HOTPCredentials user(pamh, DEFAULT_PATH + login); HOTPWindow userWindow(pamh, 20, user); #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "Checking HOTP Window For User..."); #endif if ((counter = userWindow.verify(passcode))) { user.setCounter(counter+1); user.serializeCounter(DEFAULT_PATH + login); pam_syslog(pamh, LOG_NOTICE, "pam_barada: authentication successful for %s\n", login.c_str()); return PAM_SUCCESS; } else { return PAM_AUTH_ERR; } } int pam_sm_setcred( pam_handle_t *pamh, int flags, int argc, const char **argv ){ return PAM_CRED_UNAVAIL; } barada-pam-0.5.3/src/HOTP.cpp0000644000175200017520000000474711761714660012523 00000000000000/* * Copyright (c) 2008-2010 Moxie Marlinspike * * 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 3 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #include "HOTP.h" #include "Util.h" #include #include #include #include #include #include #undef DEBUG #define HMAC_SIZE 20 #define OFFSET_BYTE 19 HOTP::HOTP(const pam_handle_t *pamh, const unsigned char *key, uint32_t keyLength, uint64_t counter, uint32_t pin) { this->pamh = pamh; uint32_t pinActivatedKeyLength = keyLength + sizeof(pin); unsigned char *pinActivatedKey = (unsigned char*)malloc(pinActivatedKeyLength); memcpy(pinActivatedKey, key, keyLength); Util::int32ToArrayBigEndian(pinActivatedKey + keyLength, pin); #ifdef DEBUG for (int i=0;i #include #include #include #include #include #include #include #include #include #include #include using namespace std; using namespace boost; #define COUNTER_FILE "counter" #define PIN_FILE "pin" #define KEY_FILE "key" #undef DEBUG HOTPCredentials::HOTPCredentials(uint64_t counter, uint32_t pin, unsigned char *key) { this->counter = counter; this->pin = pin; memcpy(this->key, key, sizeof(this->key)); } HOTPCredentials::HOTPCredentials(const pam_handle_t *pamh, const string &path) { this->pamh = pamh; loadCounter(path); loadKey(path); loadPin(path); } void HOTPCredentials::serialize(const string &path) { serializeCounter(path); serializeKey(path); serializePin(path); } void HOTPCredentials::setCounter(uint64_t counter) { this->counter = counter; } uint64_t HOTPCredentials::getCounter() { return counter; } uint32_t HOTPCredentials::getPin() { return pin; } const unsigned char* HOTPCredentials::getKey() { return key; } uint32_t HOTPCredentials::getKeyLength() { return sizeof(key); } void HOTPCredentials::serializePin(const string &path) { string pinPath = path + "/" + PIN_FILE; ofstream pinFile(pinPath.c_str()); pinFile << this->pin << endl; pinFile.close(); chmod(pinPath.c_str(), S_IRUSR | S_IWUSR); } void HOTPCredentials::serializeKey(const string &path) { string keyPath = path + "/" + KEY_FILE; ofstream keyFile(keyPath.c_str()); string keyString = Util::charToHexString(key, sizeof(key)); keyFile << keyString << endl; keyFile.close(); keyString.clear(); } void HOTPCredentials::serializeCounter(const string &path) { string counterPath = path + "/" + COUNTER_FILE; ofstream counterFile(counterPath.c_str()); counterFile << this->counter << endl; counterFile.close(); chmod(counterPath.c_str(), S_IRUSR | S_IWUSR); } void HOTPCredentials::loadCounter(const string &path) { string counterPath = path + "/" + COUNTER_FILE; ifstream counterFile; counterFile.exceptions ( ifstream::eofbit | ifstream::failbit | ifstream::badbit ); counterFile.open(counterPath.c_str()); string line; getline(counterFile, line); #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "Read Counter Line: %s", line.c_str()); #endif this->counter = lexical_cast(line); #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "Cast To Counter: %d", this->counter); #endif } void HOTPCredentials::loadKey(const string &path) { string keyPath = path + "/" + KEY_FILE; ifstream keyFile; keyFile.exceptions ( ifstream::eofbit | ifstream::failbit | ifstream::badbit ); keyFile.open(keyPath.c_str()); string line; getline(keyFile, line); #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "Read Key: %s", line.c_str()); #endif Util::hexStringToChar(key, sizeof(key), line); line.clear(); } void HOTPCredentials::loadPin(const string &path) { string pinPath = path + "/" + PIN_FILE; ifstream pinFile; pinFile.exceptions ( ifstream::eofbit | ifstream::failbit | ifstream::badbit ); pinFile.open(pinPath.c_str()); string line; getline(pinFile, line); this->pin = lexical_cast(line); #ifdef DEBUG pam_syslog(pamh, LOG_EMERG, "Read Pin: %d", this->pin); #endif } barada-pam-0.5.3/src/Util.h0000644000175200017520000000112611761714660012317 00000000000000#ifndef __UTIL_H__ #define __UTIL_H__ #include #include #include #include #include #include class Util { public: static void int64ToArrayBigEndian(unsigned char *a, uint64_t i); static void int32ToArrayBigEndian(unsigned char *a, uint32_t i); static void hexDump(const pam_handle_t *pamh, unsigned char *buf, int length); static void hexStringToChar(unsigned char *buffer, int len, std::string &hexString); static std::string charToHexString(const unsigned char* buffer, size_t size); }; #endif barada-pam-0.5.3/src/Makefile.am0000644000175200017520000000071211761734032013260 00000000000000AM_CXXFLAGS = -Wall -fPIC -ggdb noinst_HEADERS = HOTPCredentials.h HOTPWindow.h HOTP.h Util.h noinst_PROGRAMS = HexTest bin_PROGRAMS = barada-add barada_add_SOURCES = barada-add.cpp HOTPCredentials.cpp Util.cpp pam_barada_sodir = /lib/security/ pam_barada_so_PROGRAMS = pam_barada.so pam_barada_so_SOURCES = HOTP.cpp HOTPCredentials.cpp HOTPWindow.cpp pam_barada.cpp Util.cpp pam_barada_so_LDFLAGS = -shared HexTest_SOURCES = HexTest.cpp Util.cpp barada-pam-0.5.3/src/HexTest.cpp0000644000175200017520000000203111761714660013315 00000000000000#include "Util.h" #include #include #include #include #include #include #include #include int main(int argc, char **argv) { unsigned char buf[16]; unsigned char res[16]; if (!(RAND_bytes(buf, sizeof(buf)))) { fprintf(stderr, "Error: Not enough entropy available to generate key. Try again later.\n"); return 0; } printf("Generated Random Data:\n"); for (unsigned int i=0;i #include #include "HOTPCredentials.h" class HOTPWindow { private: const pam_handle_t *pamh; int windowSize; uint64_t counter; const unsigned char* key; uint32_t keyLength; uint32_t pin; public: HOTPWindow(const pam_handle_t *pamh, int windowSize, HOTPCredentials &credentials); uint64_t verify(uint32_t remoteOtp); }; #endif barada-pam-0.5.3/src/HOTPWindow.cpp0000644000175200017520000000330011761714660013673 00000000000000/* * Copyright (c) 2008-2010 Moxie Marlinspike * * 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 3 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #include #include "HOTPWindow.h" #include "HOTP.h" #include "HOTPCredentials.h" #include #include #include #undef DEBUG HOTPWindow::HOTPWindow(const pam_handle_t *pamh, int windowSize, HOTPCredentials &credentials) { this->pamh = pamh; this->windowSize = windowSize; this->key = credentials.getKey(); this->keyLength = credentials.getKeyLength(); this->counter = credentials.getCounter(); this->pin = credentials.getPin(); } uint64_t HOTPWindow::verify(uint32_t remoteOtp) { int i; for (i=0;i #include #include #include #include #include #include #include #include #include #include #include "HOTPCredentials.h" #include "Util.h" #define KEY_SIZE 16 #define DEFAULT_PATH "/etc/barada.d/" using namespace std; using namespace boost; using namespace boost::filesystem; int printUsage(char *name) { cerr << endl << "You're running barada " << VERSION << endl << endl; cerr << "Usage: " << name << " " << endl; cerr << "user_name:\tA system login name." << endl; cerr << "pin_number:\tA multi-digit number." << endl; return 0; } int main(int argc, char **argv) { if (argc != 3) return printUsage(argv[0]); try { if (is_directory(path(DEFAULT_PATH) / argv[1])) { fprintf(stderr, "Error: Barada user already exists...\n"); return 0; } } catch( filesystem_error err ) { //This is the desired behavior (the user dir does not yet exist) } unsigned char key[KEY_SIZE]; if (!(RAND_bytes(key, sizeof(key)))) { fprintf(stderr, "Error: Not enough entropy available to generate key. Try again later.\n"); return 0; } if(getpwnam(argv[1]) == NULL) { fprintf(stderr, "Error: You must select a valid username. \n"); return 0; } try { // cast first to throw any exceptions before changing the filesystem HOTPCredentials credentials(1, lexical_cast(argv[2]), key); create_directory(path(DEFAULT_PATH)); chmod(DEFAULT_PATH, S_IRUSR | S_IWUSR); create_directory(path(DEFAULT_PATH) / argv[1]); chmod((string(DEFAULT_PATH) + "/" + argv[1]).c_str(), S_IRUSR | S_IWUSR); credentials.serialize(string(DEFAULT_PATH) + "/" + argv[1]); cout << "Added " << argv[1] << " with key:" << endl; std::string keyString = Util::charToHexString(key, sizeof(key)); cout << keyString << endl; return 0; } catch (filesystem_error err) { fprintf(stderr, "Error: you don't appear to have write permissions to create\n"); fprintf(stderr, "the Barada files. Are you root?\n"); return 0; } catch (bad_lexical_cast err) { fprintf(stderr, "Error: The PIN provided either contains alpha characters\n"); fprintf(stderr, "or is too large\n"); return 0; } } barada-pam-0.5.3/src/Makefile.in0000644000175200017520000004353711763345666013322 00000000000000# Makefile.in generated by automake 1.11.3 from Makefile.am. # @configure_input@ # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, # 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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@ VPATH = @srcdir@ pkgdatadir = 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uninstall-pam_barada_soPROGRAMS # 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: barada-pam-0.5.3/src/HOTP.h0000644000175200017520000000223511761714660012156 00000000000000/* * Copyright (c) 2008-2010 Moxie Marlinspike * * 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 3 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #ifndef __HOTP_H__ #define __HOTP_H__ #include #include #include class HOTP { private: const pam_handle_t *pamh; uint32_t otp; uint32_t truncate(unsigned char *hmac); public: HOTP(const pam_handle_t *pamh, const unsigned char *key, uint32_t keyLength, uint64_t counter, uint32_t pin); uint32_t getOneTimePasscode(); }; #endif barada-pam-0.5.3/configure.ac0000644000175200017520000000204311763343747012735 00000000000000AC_PREREQ([2.4]) AC_INIT([barada-pam], [0.5.3], [https://sourceforge.net/tracker/?group_id=244354&atid=1125440]) AC_CONFIG_SRCDIR([src/pam_barada.cpp]) AM_INIT_AUTOMAKE AC_PROG_CC AC_PROG_CXX # Checks for libraries. AC_CHECK_LIB(boost_filesystem, main, , [ AC_CHECK_LIB(boost_filesystem-mt, main, , [ AC_MSG_ERROR("boost-filesystem is needed.") ]) ]) AC_CHECK_LIB(boost_system, main, , [ AC_CHECK_LIB(boost_system-mt, main, , [ AC_MSG_ERROR("boost-system is needed.") ]) ]) AC_CHECK_LIB(pam, pam_start, [], AC_MSG_ERROR([PAM Libraries Required])) AC_CHECK_LIB(crypto, HMAC, [], AC_MSG_ERROR([openssl libraries required])) # Checks for header files. AC_CHECK_HEADERS([stdint.h stdlib.h string.h syslog.h unistd.h openssl/hmac.h boost/lexical_cast.hpp]) # Checks for typedefs, structures, and compiler characteristics. AC_TYPE_SIZE_T AC_TYPE_UINT32_T AC_TYPE_UINT64_T AC_TYPE_UINT8_T # Checks for library functions. AC_FUNC_MALLOC AC_CHECK_FUNCS([memset strdup]) AC_CONFIG_FILES([Makefile src/Makefile man/Makefile]) AC_OUTPUT barada-pam-0.5.3/ChangeLog0000644000175200017520000000031111763345460012207 000000000000000.5.3 Basil North Improved error handling. Added check for valid system user. 0.5.2 Basil North Added man pages for pam-barada and barada-add. barada-pam-0.5.3/INSTALL0000644000175200017520000000440011761743610011466 00000000000000 This module is built and installed using the standard GNU build process. It depends on the GNU build tools, PAM, openssl, and the Boost STL library. Installing a source release from the command-line: $ ./configure $ make $ sudo make install Building the source from the Git repository: $ git clone git://barada.git.sourceforge.net/gitroot/barada/barada $ cd barada $ autoreconf $ ./configure $ make $ sudo make install You then need to configure your PAM stack to use the Barada module for authorization. In the /etc/pam.d/ directory you will find a list of programs which use PAM. If, for instance, you would like to use this in conjunction with SSH, you'd edit the file /etc/pam.d/sshd -- which should already exist. Just above the line: @include common-auth ...you would add the line: auth sufficient pam_barada.so This means that when sshd calls out to the PAM stack for authorization, the barada module will be used before the standard password-based authorization module. Here we have listed it as "sufficient," which means that should the authorization succeed it will be considered successful, but if it fails it will continue on with the rest of the PAM stack to try and find a success. This means that at any time you can use a OTP credential or your password. Once you have PAM configured, you need to setup the Barada credentials for the users you would like to make it available for. The program "barada-add" should have been installed into /usr/local/bin/ and should be run as such: $ sudo barada-add ...where username is the name of the user that you want to have Barada access, and pin is an arbitrary-length pin number for that user's credentials. barada-add should then print a result like: $ sudo barada-add someUser 1234 Added someUser with key: 94102985ae8690d28348702459ef4057 $ The key printed here needs to be installed on the user's device. The best way to do it is to read it off the screen here and type it in directly when the Android-based client software prompts you for it. This is the only time that you'll have to enter the key. After that, you'll just need to enter the PIN each time you want an OTP. At this point, you should be ready to go. 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You must obey the GNU General Public License in all respects for all of the code used other than "OpenSSL". If you modify this file, you may extend this exception to your version of the file, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version." GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works. The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things. To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others. For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it. For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions. Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. 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If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions. When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission. Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by the copyright holders of that material) supplement the terms of this License with terms: a) Disclaiming warranty or limiting liability differently from the terms of sections 15 and 16 of this License; or b) Requiring preservation of specified reasonable legal notices or author attributions in that material or in the Appropriate Legal Notices displayed by works containing it; or c) Prohibiting misrepresentation of the origin of that material, or requiring that modified versions of such material be marked in reasonable ways as different from the original version; or d) Limiting the use for publicity purposes of names of licensors or authors of the material; or e) Declining to grant rights under trademark law for use of some trade names, trademarks, or service marks; or f) Requiring indemnification of licensors and authors of that material by anyone who conveys the material (or modified versions of it) with contractual assumptions of liability to the recipient, for any liability that these contractual assumptions directly impose on those licensors and authors. All other non-permissive additional terms are considered "further restrictions" within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying. If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms. Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way. 8. Termination. You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11). However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation. Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice. Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10. 9. Acceptance Not Required for Having Copies. You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so. 10. Automatic Licensing of Downstream Recipients. Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License. An "entity transaction" is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations. If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts. You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it. 11. Patents. A "contributor" is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's "contributor version". A contributor's "essential patent claims" are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, "control" includes the right to grant patent sublicenses in a manner consistent with the requirements of this License. Each contributor grants you a non-exclusive, worldwide, royalty-free patent license under the contributor's essential patent claims, to make, use, sell, offer for sale, import and otherwise run, modify and propagate the contents of its contributor version. In the following three paragraphs, a "patent license" is any express agreement or commitment, however denominated, not to enforce a patent (such as an express permission to practice a patent or covenant not to sue for patent infringement). To "grant" such a patent license to a party means to make such an agreement or commitment not to enforce a patent against the party. If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not available for anyone to copy, free of charge and under the terms of this License, through a publicly available network server or other readily accessible means, then you must either (1) cause the Corresponding Source to be so available, or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a manner consistent with the requirements of this License, to extend the patent license to downstream recipients. "Knowingly relying" means you have actual knowledge that, but for the patent license, your conveying the covered work in a country, or your recipient's use of the covered work in a country, would infringe one or more identifiable patents in that country that you have reason to believe are valid. If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it. A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007. Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law. 12. No Surrender of Others' Freedom. If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program. 13. Use with the GNU Affero General Public License. Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such. 14. Revised Versions of this License. The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation. If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program. Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version. 15. Disclaimer of Warranty. THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 16. Limitation of Liability. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 17. Interpretation of Sections 15 and 16. If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 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 3 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 . Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: Copyright (C) This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see . The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read .