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J?^'{[NKK+OҥҬ.$ UiA}),ZMh?{X,? @֭`d}2adlKMLpMcO?irLEĉtAW\-Z[ }M4h6$L|5v,c7(7ע֣jw/_qpyzzbܹ~ΖxA({ӎ9C׮UB{61[_c_ 9طwMMN sܹvM{Ν;=zۏ?XVVVkX9m&்QnIEYΟ7%K·~dks\7zӦ ڔZ"I@f ȅ jڷD \*B⒒H!"BHQTP>!$ !YIyFyJyB BB!!B}BH2!$I&_L~~~ǎ{ݻwj֬YWW꿣Q#2|tQr\PByB߄s3ӄJ%ٓEV^H,\Hܽ>; l߾I |޽;lS DW'`ٳ~0GD޴2e#}{NfMy:=GtM3hCǎ5 Yx}yjzz¹Q#zx!rfg#s$.Rlh+ʣP\i~9 ݼy f͛+nթMI!M[dmРAUj`/ǎ{K.YN!52dom},#|>Hvy)/yU߫V^mwj<-u !E E͂ҮkWHϞ=1 ..n̙;wd`tx<ҫW/Çw}䉕fk׮9Ю 7nԍ' BBO4kc+رcotԩ Bu#y<͵D=}JX,2~.\0N ??Խ{CPI^H=Hhh(y79ԣGC?ӡ8mK.pppPly@c77,r9Ȝ9 ,6mZʕ+u#FTi ΜI  BȡkHې¦5fHΝK/^<ի/^6:"*ú@77hX>{{{f͚itt2//*GGP2[Rjr,ݴ80bH``r8H̜Ϩ}A$s'ÄhQ+V'''lٲ興9rdaǎߩK/cǎڵ"}|@^;!(+#zc‡A4s!gioLSWOjUfհR:ehKqVbp ID CɌ 1(e`fCl3N` FʼnѠه'Bz@軽{=ߟ`nz}^xxغ;㱬 WmmWGӃLX҂ՍXX^qqjݗ,Y)))'O~f Ξ=[7>z!>}8'\vP*l3JOQ&''cVV`0$'&&Z`bXx1PK$˖ۤpp֭%6”(((c$(ϟ;fGzz k C;ͷr-))tss{:^ǶSNY%XZ懄4( p.-_ɱ.9*l6<g`0000`v횡PYYihnn6twwf/nJKKk׮3FP(P.{{JQVV2l=U*j\.tӒCDٸqj|F(Ȯ)Womm133I$]\\lr &<P(lm:}tdfZ@ؼ{n ܺu HJJz"h4-ֶ@QEC}}=lur{{{={o+ . |><<<`…o޼JT*a͚5...TA@xC1j0f( srrfם?{1S]zU1ݻ]P9`]g|>;wo߾-~v'///#ǫ#Fq/&ǏQQQpq3'a$''lT #/&&r9=z0L9wdd ͛LHHhgGc\>IENDB`pollinate-4.7/img/pollinate_14.png0000644000175000017500000000250612300466435017316 0ustar kirklandkirklandPNG  IHDRH-zTXtRaw profile type exifxڥm& s}!q>r?/{;;TܖeY =:4QGd4ZA|s׼UewL~N/ڏ/qFk=gG| rFLz?x og}sTrqne, =d!QirBGb1k?1<3͗e/Gh}zQȕBID֧^Z5*L+DȔ^qGj{{]ڴ@ߎ`SJ;.W聜 } nRh'Z0h`ZʋwPG\yb&O:m3fmB)-]VYb6jmml߱nYŸ7C/R?A~U/pr+(h>r*rYUaIa3)7*ItۦvTwɥeoܾ6۳ѳ ON`5ysB[Ș\j-p7:~yU86ǨceMgr*kOڦ.\ H:K<-6B pµɰ<[ҽ|4?DC/>capRy HIvYR"~D *jxJ'+NY%hsBIT|doIDAT(kaǿ끋cAL&7Ho Cp 4CɡK `@] -E(PnС&d'K Z<_> cj]5'?]ݑ$q>}/`o1kw} Ė>`6Ƙ0dRH\N#y`0@bB8jς X%1 )r]_ >Ym # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, version 3 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . set -e PKG="pollinate" TMPDIR=$(mktemp -d -t "${PKG}.XXXXXXXXXXXX") trap "rm -rf ${TMPDIR} 2>/dev/null || true" EXIT HUP INT QUIT TERM CACHEDIR="/var/cache/${PKG}" FLAG="${CACHEDIR}/seeded" LOG="${CACHEDIR}/log" HOSTNAME=$(hostname) [ -r "/etc/default/${PKG}" ] && . "/etc/default/${PKG}" error() { printf "$(date '+%b %e %T') ${HOSTNAME} " 1>&2 logger -i -s -t ${PKG} "ERROR: $@" exit 1 } log() { if [ "${QUIET}" = "1" ]; then # quiet mode, don't log to stderr if [ -w "$CACHEDIR" ]; then # log to file, if we can printf "$(date '+%b %e %T') ${HOSTNAME} " >> "${LOG}" logger -i -s -t ${PKG} "$@" 2>>"${LOG}" else # log to syslog, if its up logger -i -t ${PKG} "$@" fi else # log to both stderr and syslog printf "$(date '+%b %e %T') ${HOSTNAME} " 1>&2 logger -i -s -t ${PKG} "$@" fi } random_hash() { # Read and print urandom bytes head -c "${BYTES}" /dev/urandom | sha512sum | awk '{print $1}' } hash_and_write() { # Whiten input with a hash, and write to device local result= local hex=$(cat "${TMPDIR}/out" "${TMPDIR}/err" | sha512sum | awk '{print $1}') if [ "${BINARY}" = "1" ]; then result=$(/usr/bin/printf $(printf "${hex}" | sed -e "s/\(..\)/\\\x\1/g")) else result="${hex}" fi if [ "${DEVICE}" = "-" ]; then printf "%s\n" "${result}" else printf "%s" "${result}" > "${DEVICE}" fi log "client hashed response from [${1}]" } user_agent() { # Construct a user agent, with useful debug information # Very similar to Firefox and Chrome local ver="$(apt-cache policy pollinate | grep 'Installed:' | awk '{print $2}')" local curl_ver="$(apt-cache policy curl | grep 'Installed:' | awk '{print $2}')" local lsb="$(lsb_release -is)/$(lsb_release -rs)" local platform="$(uname -o)/$(uname -r)/$(uname -m)" USER_AGENT="pollinate${TESTING}/${ver} curl/${curl_ver} ${lsb} ${platform}" } exchange() { local server="${1}" local f1="${TMPDIR}/challenge" case "${server}" in "http://"*|"https://"*) # looks good true ;; *) # otherwise, default to https:// server="https://${server}" ;; esac if [ "${NO_CHALLENGE}" != "1" ]; then # Create and enforce a challenge/response, to ensure personal communication local challenge=$(random_hash) local challenge_response=$(printf "${challenge}" | sha512sum | awk '{print $1}') printf "challenge=%s" "$challenge" > "${f1}" log "client sent challenge to [${1}]" else f1="/dev/null" fi local out="${TMPDIR}/out" local err="${TMPDIR}/err" user_agent curl -A "${USER_AGENT}" -o- -v --trace-time --connect-timeout ${WAIT} --max-time ${WAIT} --data @${f1} ${CURL_OPTS} ${server} >"${out}" 2>"${err}" || error "Network communication failed [$?]\n$(cat ${out} ${err})" if [ "${NO_CHALLENGE}" != "1" ]; then [ "${challenge_response}" = $(head -n1 "${out}") ] || error "Server failed challenge/response [expected=${challenge_response}] != [got=$(head -n1 ${out})]" log "client verified challenge/response with [${server}]" fi hash_and_write "${server}" log "client successfully seeded [${DEVICE}]" } # Source configuration [ -r "/etc/default/pollinate" ] && . "/etc/default/pollinate" while [ ! -z "$1" ]; do case "${1}" in -b|--binary) BINARY=1 shift ;; -c|--curl-opts) CURL_OPTS="${CURL_OPTS} $2" shift 2 ;; -d|--device) DEVICE="$2" shift 2 ;; -i|--insecure) CURL_OPTS="${CURL_OPTS} --insecure" shift 1 ;; -n|--no-challenge) NO_CHALLENGE=1 shift 1 ;; -r|--reseed) RESEED=1 shift 1 ;; -s|--server) SERVER="$2" shift 2 ;; -p|--pool) POOL="${POOL} $2" shift 2 ;; -q|--quiet) QUIET=1 shift ;; -t|--testing) TESTING="-testing" shift 1 ;; -w|--wait) WAIT="$2" shift 2 ;; *) error "Unknown options [$1]" ;; esac done # Pollinate prefers to run as a privileged user unless --testing communications if [ -z "${TESTING}" ]; then if [ ! -w "${CACHEDIR}" ]; then error "should execute as the [${PKG}] user" fi if [ -e "${FLAG}" ]; then timestamp=$(stat -c "%y" "${FLAG}") log "system was previously seeded at [${timestamp}]" if [ "${RESEED}" != "1" ]; then log "To re-seed this system again, use the -r|--reseed option" exit 0 fi fi else # Output device must be stdout if we're in testing mode DEVICE="-" fi [ -n "${DEVICE}" ] || DEVICE="/dev/urandom" [ -n "${BYTES}" ] || BYTES=64 [ -n "${WAIT}" ] || WAIT="3" if [ -n "${SERVER}" ]; then POOL="${SERVER}" fi if [ -z "${POOL}" ]; then error "No servers configured in pool" fi for i in ${POOL}; do exchange "${i}" done if [ -z "${TESTING}" ]; then touch "${FLAG}" fi pollinate-4.7/README0000644000175000017500000001364012316307411014415 0ustar kirklandkirklandABSTRACT -------- Pollen is a scalable, high performance, free software (AGPL) web server, that provides small strings of entropy, over TLS-encrypted HTTPS or clear text HTTP connections. You might think of this as 'Entropy-as-a-Service'. Pollinate is a free software (GPLv3) script that retrieves entropy from one or more Pollen servers and seeds the local Pseudo Random Number Generator (PRNG). You might think of this as PRNG-seeding via Entropy-as-a-Service. Please understand...neither Pollen nor Pollinate increase the amount of entropy available on the system! Rather, Pollinate adequately and securely seeds (and periodically re-seeds) the PRNG in cloud virtual machines through communications with a Pollen server. DESCRIPTION ----------- The Linux kernel provides two special character devices interfaces to high quality entropy -- /dev/random and /dev/urandom. Both are pseudo random number generators (PRNGs), but the former conservatively guarantees quality entropy, and userspace processes reading from /dev/random will block until sufficient bits are available to fulfill the request. The latter, /dev/urandom, provides a non-blocking, limitless stream of pseudo random numbers. The manpage random(4) has far more complete description of /dev/random and /dev/urandom. See: http://manpg.es/random.4 For most practical purposes, /dev/urandom is a perfectly adequate source of entropy, as long as it is seeded properly at each boot. Most Linux distributions (including Debian and Ubuntu) carry over a random seed from one boot to another, typically in an init script, such as /etc/init.d/urandom. In Ubuntu, that init script does the following: ... SAVEDFILE=/var/lib/urandom/random-seed POOLBYTES=512 dd if=/dev/urandom of=$SAVEDFILE bs=$POOLBYTES count=1 >/dev/null 2>&1 ... There is, you may notice, a bootstrapping problem... How does one seed /dev/urandom on a system's very first boot? On laptops, desktops, tablets, phones, and other physical systems, input devices, such as a keyboard, mouse, touch screen, or microphone can provide sufficient entropy to seed the PRNG through the kernel's collection of timers and interrupts. However, virtual machines typically have no access to real hardware and few, if any, sufficient entropy sources. Several real attacks have been demonstrated recently against SSH and SSL, with certificates generated with poor entropy, such as: https://factorable.net/weakkeys12.extended.pdf The cryptographic security of virtual machines and cloud instances can be significantly improved by fetching a sufficient amount of entropy at first boot (and periodically thereafter) to seed the PRNG with external sources of entropy. IMPLEMENTATION ---------- Pollen is a fast and efficient web service, implemented in Golang. It provides small random strings to its clients over network connections. Pollen utilizes TLS (SSL) to ensure privacy, security, and non-repudiation of connections among its clients. Pollinate is a client utility, implement in Shell, which wraps curl(1) and communicates securely with one or more Pollen servers. The default protocol for all connections is HTTPS, however HTTP is available for debug, testing, or other purposes. To ensure the privacy and security of connections, the Pollen server should ideally have a CA-signed certificate, or pre-arrange the distribution of certificates to its clients. An entropy request should optimally contain a POST argument: - challenge - a randomly generated checksum to ensure unique communication with the Pollen server The challenge POST argument is a hex-encoded sha512sum(1) value, which is 128 ASCII characters of [0-9a-f]. Regardless of the value of the 'challenge', the Pollen server will treat the input as a string and calculate the sha512sum. This ensures that any malicious input from a deviant client is whitened to a simple hash before the server operates upon it. The server then responds to the client with the sha512 checksum of the challenge on the first line, and the second line of the response will contain the sha512sum of the challenge. The client verifies the challenge/response, which is intended to help ensure that this communication between the client and server is a custom response, and that the server actually "did some work", and thus affected the entropy state on the server. The client uses a special option to curl(1), which details all of the communication to the server, and includes high resolution, local timestamps. This information, which is not easily detectable or reproducible by an attacker (or the Pollen server administrator), is combined with the server's responses, and written into the Linux PRNG, /dev/urandom, which is folded into the local system entropy. POLLEN AND POLLINATE IN UBUNTU ------------------------------ Canonical provides a Pollen server as a service to the Ubuntu community at https://entropy.ubuntu.com. Beginning with Ubuntu 14.04, Ubuntu cloud images include the Pollinate client, which will try (for up to 3 seconds at first boot) to seed the PRNG with input from https://entropy.ubuntu.com. This service is highly available, with multiple physical servers deployed in a cluster using Juju service orchestration. Each of these Pollen servers have at least two hardware random number generators, ensuring high quality entropy as a service, and diversified against hardware failure. Moreover, a busy Pollen server, handling many challenge/response calculations and serving numerous concurrent connections, will have a computationally complex and impossible to reproduce entropy state. Ubuntu cloud users are welcome to add other Pollen servers to their pool, or just run their own internally, behind their firewall. Simply edit the configuration file in /etc/default/pollinate. Ubuntu users and other distributions are certainly welcome to install and run their own Pollen server, with 'sudo apt-get install pollen' or 'bzr branch lp:pollen' and compile from source. Be safe, and secure out there! :-Dustin pollinate-4.7/ChangeLog0000644000175000017500000010003112321305524015275 0ustar kirklandkirklandpollinate (4.7) released; urgency=low * README: - update documentation; pollinate no longer runs daily * entropy.ubuntu.com.pem: LP: #1304777 - entropy.ubuntu.com re-keyed SSL certs due to heartbleed OpenSSL vulnerability -- Dustin Kirkland Fri, 07 Mar 2014 16:46:18 -0600 pollinate (4.6-0ubuntu1) trusty; urgency=low * debian/pollinate.default: - move the default from POOL to SERVER - this way, someone can zero out SERVER, whereas POOL is always additive * pollinate: - save a few forks of hostname * debian/pollinate.upstart, pollinate: LP: #1286316 - now that cloud-init itself is calling pollinate, remove the "start on starting cloud-init" trigger - when running pollinate through cloud-init, we are not guaranteed that syslog will be up, and smoser insists on running pollinate --quiet thus we will quietly log our pollinate activity in /var/cache/pollinate/log -- Dustin Kirkland Fri, 07 Mar 2014 16:46:16 -0600 pollinate (4.5-0ubuntu1) trusty; urgency=low * pollinate: - fix exit, when in testing mode -- Dustin Kirkland Fri, 28 Feb 2014 14:12:14 -0600 pollinate (4.4-0ubuntu1) trusty; urgency=low * pollinate: - relocate the testing string * pollinate, pollinate.1: - when testing, force the out to stdout -- Dustin Kirkland Fri, 28 Feb 2014 13:56:11 -0600 pollinate (4.3-0ubuntu1) trusty; urgency=low [ JuanJo Ciarlante and Dustin Kirkland ] * pollinate, pollinate.1: - add a -t|--testing flag, to verify communications with a pollen server; useful with the pollen nagios check - can run as a non-privileged user - does NOT affect the local PRNG -- Dustin Kirkland Fri, 28 Feb 2014 10:43:36 -0600 pollinate (4.2-0ubuntu1) trusty; urgency=low * debian/pollinate.default: - use curl --capath /dev/null by default, to mitigate SSL CA MitM attacks, since we're shipping our own public cert -- Dustin Kirkland Mon, 17 Feb 2014 05:52:47 -0600 pollinate (4.1-0ubuntu1) trusty; urgency=low * pollinate, pollinate.1: - remove unused variable f2 - add support for -n|--no-challenge argument - this technically makes it possible to use any arbitrary URL as an entropy server + e.g. random.org, news.google.com - document the option in the manpage * pollinate: - move CURL_OPTS to the end of the line, so that the admin can override any curl option, such as the user-agent string in /etc/default/pollinate -- Dustin Kirkland Tue, 11 Feb 2014 18:05:53 -0600 pollinate (4.0-0ubuntu1) trusty; urgency=low * ChangeLog, check_pollen, COPYING, debian/control, debian/copyright, debian/pollen.default, debian/pollen.install, debian/pollen.manpages, debian/pollen.postinst, debian/pollen.postrm, debian/pollen.upstart, debian/rules, img/pollen_14.png, img/pollen_192.png, img/pollen_64.png, img/pollinate_14.png, img/pollinate_192.png, img/pollinate_64.png, img/pollinate.png, INSTALL, Makefile, pollen.8, pollen.go, usr.bin.pollen: - split pollinate out into its own project and source package - pollinate is a simple shell script, whereas pollen is a compiled golang binary; this was proving far too complex to manage together * debian/pollinate.postinst, debian/pollinate.preinst: LP: #1278770 - clean up busted/broken conffile, oops -- Dustin Kirkland Tue, 11 Feb 2014 09:43:23 -0600 pollen (3.17-0ubuntu1) trusty; urgency=low * pollinate: - improve kernel debug info * debian/control, debian/pollen.install, Makefile: - TEMPORARILY disabling the building of pollen, until either gccgo or golang-go get promoted to main - this should be reverted as soon as a go compiler is available as a build dep -- Dustin Kirkland Mon, 10 Feb 2014 14:16:08 -0600 pollen (3.16-0ubuntu1) trusty; urgency=low * pollinate: - minor standardization of the user agent string -- Dustin Kirkland Wed, 05 Feb 2014 13:57:42 +0200 pollen (3.15-0ubuntu1) trusty; urgency=low * debian/control: LP: #1274074 - build on any architecure, now that we build with gccgo -- Dustin Kirkland Wed, 05 Feb 2014 12:31:20 +0200 pollen (3.14-0ubuntu1) trusty; urgency=low * debian/pollinate.postinst: - fix order of operations, packaging breakage -- Dustin Kirkland Wed, 05 Feb 2014 11:34:36 +0200 pollen (3.13-0ubuntu1) trusty; urgency=low * README: - fix more minor typos - explain "did some work" * debian/rules, Makefile: - fix the build for gccgo - must use the -g parameter - don't strip binaries - these are ugly, but are the result of gccgo vs golang-go * pollinate: - remove unused variable $cmd * debian/pollinate.upstart: - our upstart job should start on starting cloud-init, to ensure that we get run before generating SSH keys * debian/pollinate.install, debian/pollinate.postrm, pollen.go, pollinate, pollinate.cron.d, README: - drop the tag and cronjob per feedback from sarnold in the code audit in LP: #1246098 * debian/pollinate.default, pollinate: - add helpful debug info to user agent, similar to chrome and firefox, * debian/pollinate.postinst, debian/pollinate.postrm, debian/pollinate.upstart, pollinate, pollinate.1: - use a pollinate user, rather than the daemon user - by default, only run pollinate once per system instantiation - offer reseeding as an option, though * debian/control: - need to depend on adduser -- Dustin Kirkland Tue, 04 Feb 2014 11:51:22 +0200 pollen (3.12-0ubuntu1) trusty; urgency=low * README: - minor documentation feedback from Kees Cook - note that pollen servers can of course be run internally * debian/control: - clean up package descriptions a bit -- Dustin Kirkland Tue, 28 Jan 2014 22:16:10 +0000 pollen (3.11-0ubuntu1) trusty; urgency=low * README: - updates to the README * debian/copyright, pollinate: - the client should really be GPLv3, rather than AGPL * debian/copyright: - point to the local copy of GPLv3 license -- Dustin Kirkland Mon, 27 Jan 2014 13:54:16 +0000 pollen (3.10-0ubuntu1) trusty; urgency=low * debian/pollinate.cron.d, debian/pollinate.postinst, pollinate: - have each client choose a random time of day to reseed, at first run, rather than at package installation time - this requires a very clever hack(!) - install a "template" at /etc/cron.d/pollinate, with __MINUTE__ and __HOUR__ symbols that should be replaced by the client, at first run - cron requires that /etc/cron.d/pollinate be owned by root - ideally we'd run the pollinate script as a non-root user (ie, daemon), by specifying the daemon user in upstart and in the cronjob - but daemon can't write to /etc/cron.d/pollinate, if it's owned by root - so here's the hack... + the upstart job installed by the package has "setuid root" + on its first run (which will be either at package install time, or at boot), it will run as root and: a) update the cronjob to a random time, and b) update the upstart job to run as daemon + woot + this works because both are conffiles * debian/pollen.postinst, debian/pollinate.postinst, debian/pollinate.postrm, pollinate: - use /var/cache/pollinate, rather than /var/lib/pollinate - this should make it more obvious that this data can be cleared out, and should be cleared out, on re-bundles or snapshots and reimages * debian/control, Makefile: - switch from golang-go to gcc-go, so that we can get this source package into Ubuntu main * pollinate, pollinate.1: - separate the pool and the server variables * debian/control: - no need to depend on bsdutils, it's essential - pollen depends on adduser * usr.bin.pollen: - update apparmor profile to allow reading of /usr/bin/pollen - oddly, this was introduced when switching compilers * debian/copyright: - lintian/dep5 cleanup -- Dustin Kirkland Thu, 16 Jan 2014 11:39:42 -0600 pollen (3.9-0ubuntu1) trusty; urgency=low * debian/pollinate.default: - don't use quiet by default, do use binary * pollinate: - save ourselves an unneeded fork * debian/control: - drop haveged as a suggests * debian/pollinate.default, debian/pollinate.install, entropy.ubuntu.com.pem: - install entropy.ubuntu.com.pem's certificate and intermediate chain, to get rid of --insecure curl option * debian/control, pollinate: - log to the system log, using the logger utility - add a final message, noting successful (re-)seed - have pollinate depend on bsdutils, which provides logger -- Dustin Kirkland Thu, 16 Jan 2014 08:01:28 -0600 pollen (3.8-0ubuntu1) trusty; urgency=low * debian/pollinate.default, debian/pollinate.postinst, debian/pollinate.upstart, pollinate: - fix the (broken) options setting in the pollinate default file - change the tag creation to happen during the pollinate runtime, rather than at package installation; this makes it more useful for downstreams and remixes of Ubuntu - ensure the daemon user owns the /var/lib/pollinate directory - run the pollinate upstart script as the daemon user * debian/pollinate.cron.d, debian/pollinate.postinst, debian/pollinate.postrm: - run the pollinate cronjob (reseed) once per day, rather than once per hour - purge pollinate files more effectively -- Dustin Kirkland Wed, 15 Jan 2014 16:49:35 -0600 pollen (3.7-0ubuntu1) trusty; urgency=low * debian/control: - demote haveged to suggests, based on feedback from Seth Arnold in LP: #1246098 * pollinate: - ensure both -c and -i can be used, without losing CURL_OPTS, as identified by Seth Arnold in LP: #1246098 * pollinate: - drop unused IPV6 variable, per review by Seth Arnold in LP: #1246098 * debian/pollen.postinst: - use pollen as our fake email address, suggested by Seth Arnold in LP: #1246098 * debian/pollinate.cron.d: - add notes in the comments about NIST DRBG Special Publication 800-90A recommendations on reseeding - add notes in the comments about why we choose a random minute - fix a bug, that was causing the cronjob to run far more frequently than desired - Addresses some issues raised by Seth Arnold in LP: #1246098 * debian/pollen.upstart, pollen.8, pollen.go: - add DEVICE as the 3rd argument to the pollen server in the upstart script - test that DEVICE is a special in upstart - document that the DEVICE is now a required argument * debian/pollen.install, Makefile, pollen: - build static binary at package build time, rather than dynamically compiling at each run, per feedback from Seth Arnold in LP: #1246098 - use a very simple, basic Makefile * debian/control: - move golang-go to a build-dependency, rather than a runtime dependency * debian/control, debian/pollen.postinst, debian/pollen.postrm, debian/pollen.upstart: - create a new user, pollen:daemon, in the postinst, remove in postrm - depend on libcap2-bin, which provides setcap - use setcap to allow the pollen binary to bind to privileged ports - run the pollen daemon as the pollen user - per feedback from Seth Arnold in LP: #1246098 * debian/pollen.upstart: - use setuid in upstart to run the pollen daemon as the pollen user * debian/pollen.postinst: - change pollen user's shell to /bin/false * debian/control, debian/pollen.install, debian/pollen.postinst, debian/rules, usr.bin.pollen: - add an apparmor profile for the pollen server, per suggestion by Seth Arnold in LP: #1246098 - big thanks to Jamie Strandboge and Seth Arnold for assistance * debian/pollinate.postinst: - these chowns are not necessary; thanks for catching Michael Terry in LP: #1246098 * debian/control: LP: #1259014 - have the pollen server depend on ent, which is used by the check_pollen nagios script -- Dustin Kirkland Wed, 15 Jan 2014 10:59:34 -0600 pollen (3.6-0ubuntu1) trusty; urgency=low * pollinate: - remove sourcing of an rc config file from $HOME, per security review from Seth Arnold * pollinate.1: - update documentation to note that multiple servers can be specified on the command line * debian/pollinate.default: - use the entropy.ubuntu.com beta site for testing - note that we're specifying the --insecure option here, as this is very much a work in progress * debian/pollinate.upstart: - start pollinate when we have networking up and running, or when we start ssh * pollen.go: - drop the nanosecond timestamp collection on the server - a good server should have real entropy hardware, and a busy server will have network traffic entropy already captured by the kernel - Suggestion by Seth Arnold in a security review * debian/pollen.default, pollinate: - drop timestamp based salting, not terribly valuable - per security review by Seth Arnold * pollinate: - drop unused $bin variable -- Dustin Kirkland Fri, 08 Nov 2013 09:59:35 -0600 pollen (3.5-0ubuntu1) trusty; urgency=low * README: - enhance and update design documentation * debian/copyright: - update to DEP-5 format -- Dustin Kirkland Tue, 29 Oct 2013 16:55:28 -0500 pollen (3.4-0ubuntu1) saucy; urgency=low * check_pollen, debian/control: - improve the nagios check - warn if: + insufficient bytes are retrieved + less than 5-bits-per-byte of entropy are calculated + an out of whack arithmetic mean - have pollen server recommend ent, which is used by the nagios check -- Dustin Kirkland Wed, 11 Sep 2013 16:56:52 -0500 pollen (3.3-0ubuntu1) saucy; urgency=low * pollen-nagios-check: - added nagios check script * check_pollen, debian/pollen.install: - rename check script and install in nagios plugins directory -- Dustin Kirkland Wed, 04 Sep 2013 14:25:49 -0500 pollen (3.2-0ubuntu1) saucy; urgency=low * README: - update design documentation * pollinate, pollinate.1: - support printing random seed to standard out - useful for debugging - add a -q|--quiet option to silence log messages * pollinate, pollinate.1: - add an option for binary data output * debian/pollen.default, debian/pollen.upstart, pollen.8, pollen.go: - re-enable support for both encrypted and non-encrypted connections - use a go subroutine to serve both out of the same process - document these changes - default to 80 and 443, allow admin to override easily via config * debian/control: - update package descriptions * pollinate: - default to, but do not force, https -- Dustin Kirkland Tue, 20 Aug 2013 18:56:11 -0500 pollen (3.1-0ubuntu1) saucy; urgency=low * pollen.go - use a global for the dev writer - write a few more timestamps into the mix during the response handler - change logging verbiage * pollinate: - use a single temp directory, rather than multiple temp files - use a trap to cleanup the temp directory - uptdate the logging verbiage - use an etc default file if available * debian/pollen.default: - drop "TCP_" in the TCP_PORT variable * pollen.go: - just use two timestamps * pollinate: - improve usability; prepend https * debian/pollinate.cron.d, debian/pollinate.default, debian/pollinate.upstart, pollinate, pollinate.1: - use an upstart job, rather than an @reboot cronjob, to do the initial prng seeding - fix the default config file -- Dustin Kirkland Wed, 14 Aug 2013 17:45:22 -0500 pollen (3.0-0ubuntu1) saucy; urgency=low * anerd, anerd-server-tcp.1 => anerd-server.1, anerd-server-tcp => anerd-server, anerd-server-tcp.go => anerd-server.go, anerd-server- udp.1, anerd-server-udp.c, configure.ac, debian/anerd- client.default, debian/anerd-server.anerd-server-tcp.upstart => debian/anerd-server.upstart, debian/anerd-server.anerd-server- udp.upstart, debian/anerd-server.default, debian/anerd- server.install, debian/anerd-server.manpages, debian/control, debian/rules, Makefile.am: - completely deprecate the UDP operation of both the client and the server - the TLS server over TCP is the only supported protocol going forward - this will necessitate a major version bump * anerd.1 => pollinate.1, anerd => pollinate, anerd-server.1 => pollen.8, anerd-server.go => pollen.go, anerd-server => pollen, ChangeLog, debian/anerd-client.cron.d => debian/pollinate.cron.d, debian/anerd-client.default => debian/pollinate.default, debian/anerd-client.install => debian/pollinate.install, debian/anerd-client.manpages => debian/pollinate.manpages, debian/anerd-client.postinst => debian/pollinate.postinst, debian/anerd-client.postrm => debian/pollinate.postrm, debian/anerd- server.default => debian/pollen.default, debian/anerd-server.install => debian/pollen.install, debian/anerd-server.manpages => debian/pollen.manpages, debian/anerd-server.postinst => debian/pollen.postinst, debian/anerd-server.upstart => debian/pollen.upstart, debian/control, debian/copyright, img/anerd_14.png, img/anerd_192.png, img/anerd_64.png, img/anerd.png, initramfs/hooks/anerd-client-udp, initramfs/scripts/init-bottom/anerd, NEWS, README, === removed directory initramfs, === removed directory initramfs/hooks, === removed directory initramfs/scripts, === removed directory initramfs/scripts/init-bottom: - rename anerd server/client to pollen / pollinate to reflect that this data is intended to "seed" a random number generator * debian/control, debian/pollen.manpages: - package maintenace for package/project rename - move manpage to section 8 * pollen.8, pollinate, pollinate.1: - documentation updated * debian/control, pollen.8, pollinate: - update some documentation and descriptions * img/pollen_14.png, img/pollen_192.png, img/pollen_64.png: - added new pollen logos * debian/control: - drop suggests -- Dustin Kirkland Tue, 13 Aug 2013 16:34:42 -0500 anerd (2.4-0ubuntu1) saucy; urgency=low * anerd-client-tcp.go: - deprecated, use the shell (curl) one for better timestamping salt * anerd-server-tcp.go: - log user-agent and nanosecond timestamp * anerd, anerd-server-tcp.go: - rename "tip" to "challenge", use for challenge/response - verify challenge/response, to ensure personalized communication * anerd: - use a common logging function throughout * anerd-server-tcp.go: - open syslog only once * anerd, debian/control: - lower socat to a suggests, while still requiring curl - dynamically check for socat/curl and error appropriately - update package description - recommend haveged on the server * debian/anerd-server.default: - do not run the UDP, by default; local admin can enable by setting a port in /etc/default/anerd-server * anerd, anerd-server-tcp.go, debian/anerd-client.postinst, debian/anerd-server.postrm: - rename uuid to tag - generate on package install, remove on purge * anerd, debian/anerd-server.postrm => debian/anerd-client.postrm: - silence search for helper utilities - fix maintainer script name * anerd: - silence missing tag error messages for now -- Dustin Kirkland Fri, 09 Aug 2013 16:16:54 +0100 anerd (2.3-0ubuntu1) saucy; urgency=low [ Matthias Klose ] * debian/control: LP: #1139188 - Don't build anerd-server on powerpc (no golang-go, prevents migration from raring-proposed to raring). -- Dustin Kirkland Fri, 02 Aug 2013 12:40:00 -0500 anerd (2.2-0ubuntu1) saucy; urgency=low * === added directory img, img/anerd_14.png, img/anerd_192.png, img/anerd_64.png, img/anerd.png: - added icons * anerd-server-tcp.go: - gofmt * anerd-server-tcp.go: - make this code more go-like, after some code review with Tim Penney * anerd-server-tcp.go: - drop unnecessary json formatting -- Dustin Kirkland Thu, 01 Aug 2013 09:21:13 -0500 anerd (2.1-0ubuntu1) saucy; urgency=low * anerd-client-tcp.go: - default to anerd.us * anerd, anerd-client-tcp.go, anerd-server-tcp.go, debian/anerd- client.default: - anerd.us is now serving on 443 * anerd, anerd-server-tcp.go: - add syslog logging to the anerd tcp server - use post for the tip from the anerd tcp client * anerd, debian/control: - use uuidgen -r for uuid and tip * anerd, anerd-server-udp.c: - add UDP to syslog messages - fix uuid related typo - add --insecure option * anerd, anerd-client-tcp.go, anerd-server-tcp.go, debian/control: - use sha512sum rather than uuidgen * anerd, debian/anerd-client.cron.d: - run at reboot, and hourly thereafter - shorten some function names * debian/anerd-client.cron.d, debian/anerd-client.postinst: - randomize the hourly cronjob to distribute load on the server, if possible * debian/control: - fix a lintian annoyance * anerd, anerd-server-tcp.go, anerd-server-udp.c: - drop byte counts in logging, as these can be misleading * anerd-server-tcp.go: - salt data with nanosecond timestamp -- Dustin Kirkland Mon, 29 Jul 2013 15:24:29 -0500 anerd (2.0-0ubuntu1) saucy; urgency=low * anerd-tcp.go: - pretty print the json * anerd-client, anerd-client.1, anerd-tcp, anerd-tcp.1, anerd-tcp.go, anerd-udp.1, anerd-udp.c, debian/anerd-server.anerd-tcp.upstart, debian/anerd-server.anerd-udp.upstart, debian/control: - drop the "asynchronous" part of aNerd, this really isn't necessary in the description anymore * anerd-tcp.go: - reduce the default size to 64 bytes, which is sufficient to seed any random number generator * anerd-tcp.go, debian/anerd-server.default: - change the default size to 64 bytes - add some notes in the comments in the configuration file - always uses TLS encryption for the TCP implementation * anerd-tcp.1 => anerd-server-tcp.1, anerd-tcp => anerd-server-tcp, anerd-tcp.go => anerd-server-tcp.go, anerd-udp.1 => anerd-server- udp.1, anerd-udp.c => anerd-server-udp.c, debian/anerd-server.anerd- tcp.upstart => debian/anerd-server.anerd-server-tcp.upstart, debian/anerd-server.anerd-udp.upstart => debian/anerd-server.anerd- server-udp.upstart, debian/anerd-server.install, debian/anerd- server.manpages, debian/rules, Makefile.am: - rename anerd-tcp to anerd-server-tcp - rename anerd-udp to anerd-server-udp * debian/anerd-client.default: - change to the new anerd.us server, which supports TCP, TLS, and UDP * anerd, anerd-client, anerd-client.1 => anerd.1, anerd-client-tcp.go, anerd-server-tcp, debian/anerd-client.cron.d, debian/anerd- client.default, debian/anerd-client.install, debian/anerd- client.manpages, debian/anerd-server.anerd-server-tcp.upstart, debian/anerd-server.install, debian/control, initramfs/hooks/anerd- client => initramfs/hooks/anerd-client-udp, initramfs/scripts/init- bottom/anerd-client => initramfs/scripts/init-bottom/anerd, Makefile.am: - major rework of client, combine udp/tcp clients into a single shell script * anerd, anerd-client-tcp.go, anerd-server-tcp, anerd-server-tcp.go, anerd-server-udp.c, COPYING, debian/copyright, initramfs/scripts/init-bottom/anerd: - changed license back to AGPL * debian/anerd-client.default, debian/anerd-server.default: - deprecate hash as a configurable; use sha512sum * anerd: - use socat in verbose mode, to add more timestamps to the log - hash the timestamped log output * debian/control: - bump standards -- Dustin Kirkland Thu, 25 Jul 2013 16:34:54 -0500 anerd (1.4-0ubuntu1) raring; urgency=low [ Dustin Kirkland ] * anerd-tcp.go: - add a very small, basic anerd-tcp server - clean up via gofmt * anerd-client: - count the number of bytes received correctly using a tmpfile - adjust info messages slightly * anerd.c: - drop crc from logging, change messages to info from debug * debian/anerd-client.default: - default to anerd.gazzang.net now that its up for good * anerd-tcp, anerd-tcp.go, debian/anerd-tcp-common.install, debian/anerd-tcp.postinst, debian/anerd-tcp.upstart, debian/anerd- web.upstart, debian/control: - create two small packages, one to launch anerd-tcp->80 and anerd-tcp->443 + both depend on anerd-tcp-common, which provides the go script - add a postinst that generates a self-signed cert if there is none; obviously, one would want to replace these with real certs if security matters to you - create two upstart scripts that start the web service on each port + means you can install one, or the other, or both * anerd-client, debian/anerd-client.default: - fix communication with remote servers - make the wait time configurable, 0.1s by default - only broadcast when no specific servers are specified - add message on broadcast bytes sent * anerd-tcp: - add interpreter * anerd-tcp.1, debian/anerd-tcp-common.manpages: - add documentation * anerd-tcp.go: - ensure that we read enough bytes * anerd.1 => anerd-udp.1, anerd.c => anerd-udp.c, anerd-web.1 => anerd-tcp.1, anerd-web => anerd-tcp, anerd-web.go => anerd-tcp.go, debian/anerd-server.anerd-udp.upstart, debian/anerd-server.default, debian/anerd-server.install, debian/anerd-server.manpages, debian/anerd-server.upstart => debian/anerd-server.anerd- tcp.upstart, debian/anerd-web-common.install, debian/anerd-web- common.manpages, debian/anerd-webs.postinst => debian/anerd- server.postinst, debian/anerd-webs.upstart, debian/anerd- web.upstart, debian/control, debian/rules, Makefile.am: - rename the C program to anerd-udp - create separate upstart scripts for anerd-tcp and anerd-udp - update documentation - drop anerd-web* packages * debian/anerd-client.postinst, debian/control, debian/anerd-client.install: - keep the initramfs code, but don't automatically update the initramfs for now, as this can render a machine without networking unbootable; re-enable this when we have a workaround for that * debian/anerd-server.postinst: - fix typo [ Hector Acosta ] * anerd.c: - Only call srandom() once -- Dustin Kirkland Fri, 15 Feb 2013 13:02:50 -0600 anerd (1.3-0ubuntu1) raring; urgency=low * anerd.1, anerd.c, anerd-client, anerd-client.1, AUTHORS, debian/anerd-server.upstart, debian/copyright: - updated email addresses and author information -- Dustin Kirkland Tue, 05 Feb 2013 09:50:23 -0600 anerd (1.2-0ubuntu1) raring; urgency=low [ Dustin Kirkland ] * debian/control, debian/cron.d: - use run-one for cronjob * anerd-client: - clean up client, make more modular, remove some variables, uses pipes to keep everything in memory * debian/anerd-client.install, debian/anerd-server.install, debian/control, debian/copyright, debian/cron.d => debian/anerd- client.cron.d, debian/default => debian/anerd-client.default, debian/upstart => debian/anerd-server.upstart: - split package into a server and client package, with a meta package depending on both * anerd.1, anerd-client.1: - manpage fixes * debian/anerd-client.cron.d, debian/anerd-client.default: - add some inline documentation - use the default file for setting defaults (ie, uncomment) * debian/control: - bump standards * debian/anerd-server.manpages, debian/manpages => debian/anerd- client.manpages, Makefile.am: - install manpages (perhaps there's a better automake way of doing this?) * anerd.c: - rename "sum" to "crc" * debian/anerd-server.upstart: - upstart needs to expect the fork - upstart does not need to sudo to the daemon user because anerd does this automatically * anerd-client: - use a $cmd variable populated with correct parameters * anerd-client, debian/control: - reluctantly add support for netcat * anerd-client, anerd-client.1: - use a default file for configuration * anerd-client: - emulate the syslog printing from the server [ Wesley Wiedenmeier ] * anerd.c, anerd-client, debian/default: - add ipv6 support * anerd.1, anerd.c, anerd-client.1, debian/manpages: - added manpages - dropped unused global -- Dustin Kirkland Tue, 22 Jan 2013 10:38:24 -0600 anerd (1.1-0ubuntu1) quantal; urgency=low * anerd.c: - define the default total exchange size - also define and use a default payload size - break up the total exchange to a bunch of smaller payloads, to increase the randomness of UDP packet ordering and timing - improve some inline documentation - lower logging to debug from info - allocate an extra byte for the data binary string - use a separate pointer for segmenting and moving through the data string - no need for null-bytes, since binary data could have null bytes within - alphabetize includes - change perrors to syslog errors - move daemon() function * Makefile.am: - fix up the build, clean out the binary and log files * anerd.c, anerd-client, debian/control, debian/cron.d, debian/default, debian/install, Makefile.am: - drop the anerd client in the C program entirely - the C program is now the server exclusively - add a bash script client, which can loop over a pool of anerd servers, and broadcast to the local network - recommend the socat package/utility, which is used to broadcast to the local network from the bash script - add a cron job to run the anerd-client regularly - add a default configuration file for configuring the pool and other tunables - remove the unnessary install file -- Dustin Kirkland Thu, 27 Sep 2012 15:40:23 -0500 anerd (1.0-0ubuntu1) quantal; urgency=low [ Dustin Kirkland ] * initial release * === added directory debian, === added directory debian/source, anerd, debian/compat, debian/control, debian/copyright, debian/install, debian/rules, debian/source/format, debian/upstart: - added packaging * anerd, anerd.conf, debian/install, debian/upstart: - add a configuration file - run as daemon (non-root) user * anerd.c, AUTHORS, ChangeLog, configure.ac, COPYING, debian/copyright, debian/upstart, INSTALL, Makefile.am, NEWS, README: - ported from python to C - added autoconf/automake build - changed license from GPLv3 to Apache2.0 for portability to other UNIX platforms * anerd.conf, debian/control, debian/install, debian/upstart: - drop conf file, add options to upstart script - update build deps * anerd.c: - use syslog, open files/sockets only once per fork - catch all responses to a client broadcast - use a common function for salt calculation - implement a very simple checksum of random data - use uint64_t for platform compatibility - add entropy to pool in client read - simplify salt generation - simplify log printing - whitespace changes only, 80 char width * debian/install: - drop installation of default file [ Wesley Wiedenmeier ] * anerd.c: - use getopt for command line parsing - Modified code to fork twice then kill the parent process, freeing the terminal that spawns the daemons, added daemonize() function to safely daemonize the program. - Improved entering into daemon status by moving daemon() call to after intilization of server and client, so that errors encountered in intilization are written to the terminal. -- Dustin Kirkland Tue, 04 Sep 2012 18:14:40 -0500 pollinate-4.7/NEWS0000644000175000017500000000014112300466435014231 0ustar kirklandkirklandFor a complete list of news articles, see: - 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It will fetch a random seed from one or more remote servers, and feed those into a (pseudo) random number generator. This is often useful in cloud and virtual machine environments with limited sources of entropy. .SH OPTIONS .TP \fB-b|--binary\fP rather than producing hex text sha512sum(1) output, convert each two hex digits into a byte of binary data .TP \fB-c|--curl-opts\fP CURL_OPTS options to pass through to \fBcurl\fP(1) .TP \fB-d|--device\fP DEVICE device to seed (default is \fI/dev/urandom\fP); note, you can use - to print to stdout .TP \fB-n|--no-challenge\fP disable the challenge/response portion of the protocol; this enables a compatibility mode to speak to any entropy server, like random.org or news.google.com .TP \fB-i|--insecure\fP ignore SSL/TLS certificate errors (use of this option is highly discouraged) .TP \fB-p|--pool\fP SERVER remote \fBpollen\fP(8) server pool to interact with; this option can be specified multiple times to interact with multiple servers in a pool .TP \fB-r|--reseed\fP by default, \fBpollinate\fP technically only needs to run successfully once ever; this option should be used if someone wants run more than once, and re-seed the PRNG .TP \fB-s|--server\fP SERVER remote \fBpollen\fP(8) server to interact with; if this option is used, the pool is ignored, and only a single server is used .TP \fB-t|--testing\fP test communications with the \fBpollen\fP(8) server; note that this will NOT actually seed your PRNG, but only verify that the local client can communicate with the remote servers; note that this option forces DEVICE to stdout .TP \fB-q|--quiet\fP silence any log messages .TP \fB-w|--wait\fP WAIT time in seconds you're willing to wait for a response from the server .SH SEE ALSO \fBpollen\fP(8) .SH AUTHOR This manpage and the utility were written by Dustin Kirkland for Ubuntu systems (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 3 published by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL, or on the web at \fIhttp://www.gnu.org/licenses/gpl.txt\fP. pollinate-4.7/COPYING0000644000175000017500000010451312300466435014575 0ustar kirklandkirkland 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. 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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 .