diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..23cb790 --- /dev/null +++ b/LICENCE @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) 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 +this service 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 make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. 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. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; or, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form with such + an offer, in accord with Subsection b above.) + +The source code for a work means the preferred form of the work for +making modifications to it. For an executable work, complete source +code means all the source code for all modules it contains, plus any +associated interface definition files, plus the scripts used to +control compilation and installation of the executable. However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +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 +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the 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 a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, 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. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE 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. + + 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 +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + {description} + Copyright (C) {year} {fullname} + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision 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, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + {signature of Ty Coon}, 1 April 1989 + Ty Coon, President of Vice + +This 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. diff --git a/letsencrypt.sh b/letsencrypt.sh new file mode 100755 index 0000000..81d9811 --- /dev/null +++ b/letsencrypt.sh @@ -0,0 +1,540 @@ +#!/bin/sh + +# letsencrypt.sh - a simple shell implementation for the acme protocol +# Copyright (C) 2015 Gerhard Heift +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., +# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +# temporary files to store input/output of curl or openssl + +trap 'rm -f "$RESP_HEADER" "$RESP_BODY" "$LAST_NONCE" "$LAST_NONCE_FETCH" "$OPENSSL_CONFIG" "$OPENSSL_IN" "$OPENSSL_OUT" "$OPENSSL_ERR"' 0 2 3 9 11 13 15 + +# file to store header of http request +RESP_HEADER="`mktemp`" +# file to store body of http request +RESP_BODY="`mktemp`" +# file with Replay-Nonce header of last request +LAST_NONCE="`mktemp`" +# tmp file for new Replay-Nonce header +LAST_NONCE_FETCH="`mktemp`" +# tmp config for openssl for addional domains +OPENSSL_CONFIG="`mktemp`" +# file to store openssl output +OPENSSL_IN="`mktemp`" +OPENSSL_OUT="`mktemp`" +OPENSSL_ERR="`mktemp`" + +CA="https://acme-v01.api.letsencrypt.org" +# CA="https://acme-staging.api.letsencrypt.org" + +base64url() { + base64 | tr '+/' '-_' | tr -d '\r\n=' +} + +# global variables: + +# base64url encoded JSON nonce, generated from Replay-Nonce header +# see gen_protected() +PROTECTED= + +# base64url encoded JSON request object +PAYLOAD= + +# base64url encoded signature of PROTECTED and PAYLOAD +# see also gen_signature() +SIGNATURE= + +# the account key used to send the requests and to verify the domain challenges +ACCOUNT_KEY= + +# the JSON Web Key is the representation of the key as JSON object +ACCOUNT_JWK= + +# the JSON object to specify the signature format +REQ_JWKS= + +# the thumbprint is the checksum of the JWK and is used for the challenges +ACCOUNT_THUMB= + +# the private key, which should be signed by the CA +SERVER_KEY= + +# the location, where the certificate should be stored +SERVER_CERT= + +# the e-mail address to be used with the account key, only needed if account +# key is not yet registred +ACCOUNT_EMAIL= + +# a list of domains, which should be assigned to the certificate +DOMAINS= + +# a list of domains, challenge uri and token +DOMAIN_DATA= + +QUIET= + +# utility functions + +handle_curl_exit() { + CURL_EXIT="$1" + CURL_URI="$2" + + if [ "$CURL_EXIT" "!=" 0 ]; then + echo "error while making a web request to \"$CURL_URI\"" > /dev/stderr + echo "curl exit status: $CURL_EXIT" > /dev/stderr + case "$CURL_EXIT" in + # see man curl "EXIT CODES" + 3) echo " malformed URI" > /dev/stderr;; + 6) echo " could not resolve host" > /dev/stderr;; + 7) echo " failed to connect" > /dev/stderr;; + 28) echo " operation timeout" > /dev/stderr;; + 35) echo " SSL connect error" > /dev/stderr;; + esac + + exit 1 + fi +} + +log() { + if [ -z "$QUIET" ]; then + echo "$@" > /dev/stderr + fi +} + +handle_openssl_exit() { + OPENSSL_EXIT=$1 + OPENSSL_ACTION=$2 + + if [ "$OPENSSL_EXIT" "!=" 0 ]; then + echo "error while $OPENSSL_ACTION" > /dev/stderr + echo "openssl exit status: $OPENSSL_EXIT" > /dev/stderr + cat "$OPENSSL_ERR" > /dev/stderr + exit 1 + fi +} + +check_http_status() { + fgrep -q "HTTP/1.1 $1 " "$RESP_HEADER" +} + +unhandled_response() { + echo "unhandled response while $1" > /dev/stderr + echo > /dev/stderr + + cat "$RESP_HEADER" "$RESP_BODY" > /dev/stderr + + echo > /dev/stderr + + exit 1 +} + +show_error() { + if [ -n "$1" ]; then + echo "error while $1" > /dev/stderr + fi + + ERR_TYPE="`sed -e 's/.*"type":"\([^"]*\)".*/\1/' "$RESP_BODY"`" + ERR_DETAILS="`sed -e 's/.*"detail":"\([^"]*\)".*/\1/' "$RESP_BODY"`" + + echo " $ERR_DETAILS ($ERR_TYPE)" > /dev/stderr +} + +# generate the PROTECTED variable, which contains a nonce retrieved from the +# server in the Replay-Nonce header + +gen_protected(){ + NONCE="`cat "$LAST_NONCE"`" + if [ -z "$NONCE" ]; then + # echo fetch new nonce > /dev/stderr + curl -D "$LAST_NONCE_FETCH" -o /dev/null -s "$CA/directory" + handle_curl_exit $? "$CA/directory" + + sed -e '/Replay-Nonce: / ! d; s/^Replay-Nonce: //' "$LAST_NONCE_FETCH" \ + | tr -d '\r\n' \ + > "$LAST_NONCE" + + NONCE="`cat "$LAST_NONCE"`" + if [ -z "$NONCE" ]; then + echo "nonce is empty?" > /dev/stderr + full_exit + fi + fi + + PROTECTED="`echo '{"nonce":"'"$NONCE"'"}' \ + | tr -d '\n\r' \ + | base64url`" + + echo | tr -d '\n\r' > "$LAST_NONCE" +} + +# generate the signature for the request + +gen_signature() { + printf "%s" "$PROTECTED.$PAYLOAD" > "$OPENSSL_IN" + openssl dgst -sha256 -binary -sign "$ACCOUNT_KEY" < "$OPENSSL_IN" > "$OPENSSL_OUT" 2> "$OPENSSL_ERR" + handle_openssl_exit "$?" "signing request" + SIGNATURE="`base64url < "$OPENSSL_OUT"`" +} + +# helper functions to create the json web key object + +key_get_modulus(){ + openssl pkey -inform perm -in "$1" -noout -text_pub > "$OPENSSL_OUT" 2> "$OPENSSL_ERR" + handle_openssl_exit $? "extracting account key modulus" + + sed -e '/^----/d; /^Public-Key:/ d; /^Modulus/ d; /Exponent: / d; s/[ :]//g' \ + < "$OPENSSL_OUT" \ + | tr -d '\r\n' \ + | sed 's/^\(00\)*//' \ + | xxd -r -p \ + | base64url +} + +key_get_exponent(){ + openssl pkey -inform perm -in "$1" -noout -text_pub > "$OPENSSL_OUT" 2> "$OPENSSL_ERR" + handle_openssl_exit $? "extracting account key exponent" + + sed -e '/Exponent: / ! d; s/Exponent: [0-9]*\s\+(\(\(0\)x\([0-9]\)\|0x\)\(\([0-9][0-9]\)*\))/\2\3\4/' \ + < "$OPENSSL_OUT" \ + | xxd -r -p \ + | base64url +} + + +# make a request to the specified URI +# the payload is signed by the ACCOUNT_KEY +# the response header is stored in the file $RESP_HEADER, the body in the file $RESP_BODY + +send_req(){ + URI="$1" + + gen_protected + PAYLOAD="`echo "$2" | base64url`" + gen_signature + + DATA='{"header":'"$REQ_JWKS"',"protected":"'"$PROTECTED"'","payload":"'"$PAYLOAD"'","signature":"'"$SIGNATURE"'"}' + + curl -s -d "$DATA" -D "$RESP_HEADER" -o "$RESP_BODY" "$URI" + handle_curl_exit $? "$URI" + + # store the nonce for the next request + sed -e '/Replay-Nonce: / ! d; s/^Replay-Nonce: //' "$RESP_HEADER" | tr -d '\r\n' > "$LAST_NONCE" +} + +register_account_key(){ + log register account + + NEW_REG='{"resource":"new-reg","contact":["mailto:'"$ACCOUNT_EMAIL"'"],"agreement":"https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf"}' + send_req "$CA/acme/new-reg" "$NEW_REG" + + if check_http_status 201; then + return + elif check_http_status 409; then + echo "account exists, just continue" > /dev/stderr + else + unhandled_response "registering account" + fi +} + +# This function returns the certificate request in base64url encoding +# arguments: domain ... +# key: the private key, which is used for the domains +# domain: a list of domains for which the certificate should be valid + + +request_challenge_domain(){ + log request challenge for $DOMAIN + + NEW_AUTHZ='{"resource":"new-authz","identifier":{"type":"dns","value":"'"$DOMAIN"'"}}' + send_req "$CA/acme/new-authz" "$NEW_AUTHZ" + + if check_http_status 201; then + DOMAIN_CHALLENGE="`sed -e '/"http-01"/ ! d; s/.*{\([^}]*"type":"http-01"[^}]*\)}.*/\1/' "$RESP_BODY"`" + DOMAIN_TOKEN="`echo "$DOMAIN_CHALLENGE" | sed 's/.*"token":"\([^"]*\)".*/\1/'`" + DOMAIN_URI="`echo "$DOMAIN_CHALLENGE" | sed 's/.*"uri":"\([^"]*\)".*/\1/'`" + + DOMAIN_DATA="$DOMAIN_DATA $DOMAIN $DOMAIN_URI $DOMAIN_TOKEN" + elif check_http_status 403; then + # account not registred? + show_error "requesting challenge for $DOMAIN" + exit 1 + else + unhandled_response "requesting challenge for $DOMAIN" + fi +} + +request_challenge(){ + set -- $DOMAINS + for DOMAIN do + request_challenge_domain + done +} + +push_response_domain() { + log push response for $DOMAIN + + # do something with DOMAIN, DOMAIN_TOKEN and DOMAIN_RESPONSE + + # echo "$DOMAIN_RESPONSE" > "/srv/www/$DOMAIN/.well-known/acme-challenge/$DOMAIN_TOKEN" + return +} + +push_response() { + set -- $DOMAIN_DATA + while [ -n "$1" ]; do + DOMAIN="$1" + DOMAIN_URI="$2" + DOMAIN_TOKEN="$3" + + shift 3 + + DOMAIN_RESPONSE="$DOMAIN_TOKEN.$ACCOUNT_THUMB" + + push_response_domain + done +} + +request_domain_verification() { + log request verification of $DOMAIN + + send_req $DOMAIN_URI '{"resource":"challenge","type":"http-01","keyAuthorization":"'"$DOMAIN_TOKEN.$ACCOUNT_THUMB"'","token":"'"$DOMAIN_TOKEN"'"}' + + if check_http_status 202; then + printf "" + else + unhandled_response "requesting verification of challenge of $DOMAIN" + fi +} + +request_verification() { + set -- $DOMAIN_DATA + + while [ -n "$1" ]; do + DOMAIN="$1" + DOMAIN_URI="$2" + DOMAIN_TOKEN="$3" + + shift 3 + + request_domain_verification + done +} + +check_verification() { + ALL_VALID=true + + while [ -n "$DOMAIN_DATA" ]; do + sleep 1 + + set -- $DOMAIN_DATA + DOMAIN_DATA="" + + while [ -n "$1" ]; do + DOMAIN="$1" + DOMAIN_URI="$2" + DOMAIN_TOKEN="$3" + + shift 3 + + log check verification of $DOMAIN + + curl -D "$RESP_HEADER" -o "$RESP_BODY" -s "$DOMAIN_URI" + handle_curl_exit $? "$DOMAIN_URI" + + if check_http_status 202; then + DOMAIN_STATUS="`sed -e 's/.*"status":"\(invalid\|valid\|pending\)".*/\1/' "$RESP_BODY"`" + case "$DOMAIN_STATUS" in + valid) + log $DOMAIN is valid + ;; + invalid) + echo $DOMAIN: invalid > /dev/stderr + show_error + + ALL_VALID=false + ;; + pending) + log $DOMAIN is pending + DOMAIN_DATA="$DOMAIN_DATA $DOMAIN $DOMAIN_URI $DOMAIN_TOKEN" + ;; + *) + unhandled_response "checking verification status of $DOMAIN" + ;; + esac + else + unhandled_response "checking verification status of $DOMAIN" + fi + done + done + + if ! $ALL_VALID; then + exit 1 + fi +} + +request_certificate(){ + log request certificate + + set -- $DOMAINS + + ALT_NAME="subjectAltName=DNS:$1" + shift + + while [ -n "$1" ]; do + ALT_NAME="$ALT_NAME,DNS:$1" + shift + done + + cat /etc/ssl/openssl.cnf > "$OPENSSL_CONFIG" + echo '[SAN]' >> "$OPENSSL_CONFIG" + echo "$ALT_NAME" >> "$OPENSSL_CONFIG" + + + openssl req -new -sha512 -key "$SERVER_KEY" -subj / -reqexts SAN -config $OPENSSL_CONFIG \ + > "$OPENSSL_OUT" \ + 2> "$OPENSSL_ERR" + handle_openssl_exit $? "creating certifacte request" + + NEW_CERT="` + sed -e 's/-----BEGIN CERTIFICATE REQUEST-----/{"resource":"new-cert","csr":"/; s/-----END CERTIFICATE REQUEST-----/"}/;s/+/-/g;s!/!_!g;s/=//g' "$OPENSSL_OUT" \ + | tr -d '\r\n' \ + `" + + send_req "$CA/acme/new-cert" "$NEW_CERT" + + if check_http_status 201; then + openssl x509 -inform der -outform pem -in "$RESP_BODY" -out "$OPENSSL_OUT" 2> "$OPENSSL_ERR" + handle_openssl_exit $? "converting certificate" + cp -- "$OPENSSL_OUT" "$SERVER_CERT" + elif check_http_status 429; then + show_error "requesting certificate" + exit 1 + else + unhandled_response "requesting certificate" + fi +} + +usage() { + cat << EOT +letsencrypt [-q] -a account_key [-n -e email] -k server_key -c signed_key domain ... +letsencrypt -p plain|nginx -a account_key + -q quiet operation + -a account_key the private key + -n register the account key at the service + -e email the email address assigned to the account key during the registration + -k server_key the privat key of the server certificate + -c signed_key the location where to store the signed key + -p format print the thumbprint of the account key or a sample configuration +EOT +} + +DO_REGISTER= +PRINT_THUMB= + +while getopts hqa:nk:c:rp:e: name; do + case "$name" in + h) usage; exit;; + q) QUIET=1;; + a) ACCOUNT_KEY="$OPTARG";; + k) SERVER_KEY="$OPTARG";; + c) SERVER_CERT="$OPTARG";; + n) DO_REGISTER=1;; + e) ACCOUNT_EMAIL="$OPTARG";; + p) PRINT_THUMB="$OPTARG";; + esac +done + +shift $(($OPTIND - 1)) + +if [ -z "$ACCOUNT_KEY" ]; then + echo no account key specified > /dev/stderr + exit 1 +fi + +if [ '!' -r "$ACCOUNT_KEY" ]; then + echo could not read account key > /dev/stderr + exit 1 +fi + +# generate JWK and JWK thumbprint + +ACCOUNT_JWK='{"e":"'"`key_get_exponent $ACCOUNT_KEY`"'","kty":"RSA","n":"'"`key_get_modulus $ACCOUNT_KEY`"'"}' +REQ_JWKS='{"alg":"RS256","jwk":'"$ACCOUNT_JWK"'}' +ACCOUNT_THUMB="`echo "$ACCOUNT_JWK" | tr -d '\r\n' | openssl dgst -sha256 -binary | base64url`" + +if [ -n "$PRINT_THUMB" ]; then + case "$PRINT_THUMB" in + plain) + echo $ACCOUNT_THUMB + exit + ;; + nginx) + cat <<"HERE" | sed "s/ACCOUNT_THUMB/$ACCOUNT_THUMB/g" +location ~ "^/.well-known/acme-challenge/([-_a-zA-Z0-9]*)$" { + return 200 "$1.ACCOUNT_THUMB"; +} +HERE + exit + ;; + *) + echo unknown format > /dev/stderr + exit 1 + ;; + esac +fi + +if [ -z "$SERVER_KEY" ]; then + echo no server key specified > /dev/stderr + exit 1 +fi + +if [ -z "$SERVER_CERT" ]; then + echo no server certificate specified > /dev/stderr + exit 1 +fi + +if [ '!' -r "$SERVER_KEY" ]; then + echo could not read server key > /dev/stderr + exit 1 +fi + +if [ -z "$1" ]; then + echo "need at least on domain" > /dev/stderr + exit 1 +fi + +DOMAINS=$1 +shift + +while [ -n "$1" ]; do + DOMAINS="$DOMAINS $1" + shift +done + +if [ -n "$DO_REGISTER" ]; then + if [ -z "$ACCOUNT_EMAIL" ]; then + echo need email address to register account key > /dev/stderr + exit 1 + fi + + register_account_key +fi + +request_challenge +push_response +request_verification +check_verification +request_certificate