├── .bintray.json.in ├── .githooks └── pre-commit.sh ├── .gitignore ├── .indent.pro ├── .travis.yml ├── COPYING ├── Makefile ├── README.md ├── SECURITY.md ├── debian ├── changelog ├── compat ├── control ├── copyright ├── docs ├── libnss-aad.conf ├── libnss-aad.install ├── libnss-aad.lintian-overrides ├── libnss-aad.postinst ├── libnss-aad.postrm ├── rules ├── source │ └── format └── watch ├── doc ├── debian.md ├── index.md └── ubuntu.md ├── docker ├── amazon │ ├── 2018.03 │ │ └── Dockerfile │ └── Dockerfile ├── debian │ └── Dockerfile └── ubuntu │ └── Dockerfile ├── libnss_aad.c ├── scripts └── docker.sh └── test ├── Makefile └── dlopentest.c /.bintray.json.in: -------------------------------------------------------------------------------- 1 | { 2 | "package": { 3 | "name": "libnss-aad", 4 | "repo": "aad", 5 | "subject": "jnchi" 6 | }, 7 | "version": { 8 | "name": "{{version}}", 9 | "desc": "pre-release", 10 | "gpgSign": true 11 | }, 12 | "licenses": [ 13 | "GPL-3.0-or-later" 14 | ], 15 | "desc": "auto-generated debian package", 16 | "files": [ 17 | { 18 | "includePattern": "./(.[^/]*(\\.deb)$)", 19 | "uploadPattern": "$1", 20 | "matrixParams": { 21 | "deb_distribution": "unstable", 22 | "deb_component": "main", 23 | "deb_architecture": "amd64" 24 | } 25 | } 26 | ], 27 | "publish": true, 28 | "override": true 29 | } 30 | -------------------------------------------------------------------------------- /.githooks/pre-commit.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | make check reformat 3 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | libnss_aad.so.2 2 | test/dlopentest 3 | *.c~ 4 | # Debian 5 | debian/*.log 6 | debian/.* 7 | debian/files 8 | debian/libnss-aad* 9 | *.deb 10 | bintray.json 11 | -------------------------------------------------------------------------------- /.indent.pro: -------------------------------------------------------------------------------- 1 | /* K&R Coding Style */ 2 | -kr 3 | -nut 4 | -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: c 2 | sudo: required 3 | services: 4 | - docker 5 | script: 6 | - /bin/sh ./scripts/docker.sh 7 | - docker run -v $(pwd):/usr/src/libnss_aad cyberninjas/libnss_aad:debian /bin/sh -c "cp /usr/src/*.deb /usr/src/libnss_aad" 8 | deploy: 9 | provider: bintray 10 | file: bintray.json 11 | user: jnchi 12 | key: 13 | secure: 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 14 | skip_cleanup: true 15 | on: 16 | tags: true 17 | 18 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | CC = gcc 2 | INDENT = indent 3 | INSTALL = /usr/bin/install 4 | INSTALL_PROGRAM = ${INSTALL} 5 | INSTALL_DATA = ${INSTALL} -m 644 6 | 7 | SRC_DIR = . 8 | 9 | PREFIX = /usr/local 10 | LIB_DIR = ${PREFIX}/lib 11 | 12 | all: libnss_aad 13 | 14 | libnss_aad: 15 | ${CC} ${CFLAGS} ${LDFLAGS} -I${SRC_DIR} -fPIC -fno-stack-protector -Wall \ 16 | -shared -Wl,--export-dynamic -o libnss_aad.so.2 -Wl,-soname,libnss_aad.so.2 \ 17 | libnss_aad.c -lcrypt -lcurl -ljansson -lm -lsds -lsodium -lxcrypt 18 | 19 | check: 20 | @CFLAGS="${CFLAGS} -Wextra -Werror -Wno-sign-compare -fsyntax-only" make 21 | @echo "checking for errors... OK" 22 | 23 | debug: 24 | @LDFLAGS="${LDFLAGS} -ggdb" make 25 | 26 | reformat: 27 | @VERSION_CONTROL=none $(INDENT) libnss_aad.c 28 | 29 | install: libnss_aad 30 | ${INSTALL_DATA} libnss_aad.so.2 ${LIB_DIR} 31 | 32 | clean: 33 | @rm -f libnss_aad.so.2 *.deb 34 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # libnss_aad [![Build Status][travis-badge]][travis-url] [![GPL-3.0-or-later][gpl-badge]][gpl-license] [![Download](https://api.bintray.com/packages/jnchi/aad/libnss-aad/images/download.svg) ](https://bintray.com/jnchi/aad/libnss-aad/_latestVersion) 2 | 3 | _Name Service Switch (NSS) Module for performing user lookups against the Azure Active Directory (AAD)._ 4 | 5 | ## Installation 6 | 7 | ```terminal 8 | make 9 | sudo make install 10 | ``` 11 | 12 | ## Configuration 13 | 14 | Edit `/etc/nsswitch.conf` to match the following: 15 | 16 | ``` 17 | passwd: compat aad 18 | group: compat 19 | shadow: compat aad 20 | ``` 21 | 22 | Note: The contents of `/etc/nsswitch.conf` differ between distributions. 23 | However, simply ensuring that `aad` is present on the `passwd`, `group`, and `shadow` lines is sufficient. 24 | 25 | ### Configuration File 26 | 27 | Create the file `/etc/libnss-aad.conf` and fill it with: 28 | 29 | ```mustache 30 | { 31 | "client": { 32 | "id": "{{client_id}}", 33 | "secret": "{{client_secret}}" 34 | }, 35 | "domain": "{{domain}}", 36 | "user": { 37 | "group": "users", 38 | "shell": "/bin/bash" 39 | } 40 | } 41 | ``` 42 | 43 | **NOTE: For now, `client.secret` must be URL-encoded.** 44 | 45 | ## Current Behavior 46 | 47 | ```terminal 48 | id tux 49 | uid=1000(tux) gid=100(users) groups=100(users) 50 | 51 | getent passwd tux 52 | tux:x:1000:100::/home/tux:/bin/bash 53 | 54 | getent shadow tux 55 | tux:$2a$12$tlMH2KjgjCvd7gV0WVU4g.RxRe2vcXzmJ/WXLUQPRsE3yyjba9YCa:13571:0:99999:7::: 56 | ``` 57 | 58 | ## See also 59 | 60 | - https://github.com/outlook/libnss-aad 61 | - https://github.com/donapieppo/libnss-ato 62 | 63 | [gpl-badge]: https://img.shields.io/badge/license-GPL-green.svg 64 | [gpl-license]: COPYING 65 | [travis-badge]: https://travis-ci.org/CyberNinjas/libnss_aad.svg?branch=master 66 | [travis-url]: https://travis-ci.org/CyberNinjas/libnss_aad 67 | -------------------------------------------------------------------------------- /SECURITY.md: -------------------------------------------------------------------------------- 1 | # Security Policy 2 | 3 | ## Supported Versions 4 | 5 | This NSS module is currently in pre-release, 6 | therefore no versions are currently being supported. 7 | 8 | ## Reporting a Vulnerability 9 | 10 | The developers should be contacted directly via [encrypted email](mailto:info@cyberninjas.com). 11 | 12 | GPG Fingerprint: [DB0A E4BD 16FD E243 074A 7F8E 9F2E C496 B122 CD97](https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x9F2EC496B122CD97) 13 | -------------------------------------------------------------------------------- /debian/changelog: -------------------------------------------------------------------------------- 1 | libnss-aad (0.0.3-1) UNRELEASED; urgency=medium 2 | 3 | * New release. 4 | 5 | -- Lucas Ramage Fri, 31 May 2019 16:19:23 +0000 6 | 7 | libnss-aad (0.0.2-1) UNRELEASED; urgency=medium 8 | 9 | * Initial release. 10 | 11 | -- Lucas Ramage Mon, 06 May 2019 19:15:25 +0000 12 | -------------------------------------------------------------------------------- /debian/compat: -------------------------------------------------------------------------------- 1 | 9 2 | -------------------------------------------------------------------------------- /debian/control: -------------------------------------------------------------------------------- 1 | Source: libnss-aad 2 | Maintainer: Lucas Ramage 3 | Section: admin 4 | Priority: optional 5 | Standards-Version: 3.9.8 6 | Build-Depends: 7 | debhelper (>=9), libtool, libcurl4-openssl-dev, 8 | libjansson-dev, libjwt-dev, libsds-dev, libsodium-dev, 9 | libssl-dev, libxcrypt-dev 10 | Vcs-Git: https://github.com/CyberNinjas/libnss_aad.git 11 | Vcs-Browser: https://github.com/CyberNinjas/libnss_aad 12 | Homepage: https://github.com/CyberNinjas/libnss_aad 13 | 14 | Package: libnss-aad 15 | Architecture: any 16 | Depends: ${shlibs:Depends}, ${misc:Depends} 17 | Description: nss module for Azure Active Directory 18 | Name Service Switch (NSS) Module for performing user lookups against the Azure Active Directory (AAD). 19 | . 20 | -------------------------------------------------------------------------------- /debian/copyright: -------------------------------------------------------------------------------- 1 | Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ 2 | Upstream-Name: libnss_aad 3 | Upstream-Contact: Lucas Ramage 4 | Source: https://github.com/CyberNinjas/libnss_aad 5 | 6 | Files: * 7 | Copyright: 2016-2019 CyberNinjas 8 | License: GPL-3+ 9 | [LICENSE TEXT] 10 | 11 | -------------------------------------------------------------------------------- /debian/docs: -------------------------------------------------------------------------------- 1 | README.md 2 | doc 3 | -------------------------------------------------------------------------------- /debian/libnss-aad.conf: -------------------------------------------------------------------------------- 1 | { 2 | "client": { 3 | "id": "{{client_id}}", 4 | "secret": "{{client_secret}}" 5 | }, 6 | "domain": "{{domain}}", 7 | "user": { 8 | "group": "users", 9 | "shell": "/bin/bash" 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /debian/libnss-aad.install: -------------------------------------------------------------------------------- 1 | debian/libnss-aad.conf etc 2 | usr/lib 3 | -------------------------------------------------------------------------------- /debian/libnss-aad.lintian-overrides: -------------------------------------------------------------------------------- 1 | # GNU GPL covers only the Debian packaging 2 | libpam-aad binary: possible-gpl-code-linked-with-openssl 3 | -------------------------------------------------------------------------------- /debian/libnss-aad.postinst: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | set -e 3 | 4 | # try to insert the unknown entry to the "passwd" and "shadow" lines in 5 | # /etc/nsswitch.conf to automatically enable libnss-aad support; do not 6 | # change the configuration if the lines already contain "aad" 7 | insert_nss_entry() { 8 | echo "Checking NSS setup..." 9 | # abort if /etc/nsswitch.conf does not exist 10 | if ! [ -e /etc/nsswitch.conf ]; then 11 | echo "Could not find /etc/nsswitch.conf." 12 | return 13 | fi 14 | perl -i -pe ' 15 | sub insert { 16 | my $line = shift; 17 | # this also splits on tab 18 | my @bits=split(" ", $line); 19 | # do not break configuration if the line already references 20 | # unknown 21 | if (grep { $_ eq "aad"} @bits) { 22 | return $line; 23 | } 24 | # add unknown at the end 25 | return $line . " aad"; 26 | } 27 | s/^(passwd:\s+)(.*)/$1.insert($2)/e; 28 | s/^(shadow:\s+)(.*)/$1.insert($2)/e; 29 | ' /etc/nsswitch.conf 30 | } 31 | 32 | fix_config_permissions() { 33 | echo "Fixing configuration permissions..." 34 | # abort if /etc/libnss-aad.conf does not exist 35 | if ! [ -e /etc/libnss-aad.conf ]; then 36 | echo "Could not find /etc/libnss-aad.conf." 37 | return 38 | fi 39 | 40 | chmod 600 /etc/libnss-aad.conf 41 | } 42 | 43 | if [ "$1" = configure ]; then 44 | if [ -z "$2" ]; then 45 | echo "First installation detected..." 46 | # first install: setup the recommended configuration 47 | insert_nss_entry 48 | fix_config_permissions 49 | fi 50 | fi 51 | 52 | #DEBHELPER# 53 | -------------------------------------------------------------------------------- /debian/libnss-aad.postrm: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | set -e 3 | 4 | remove_nss_entry() { 5 | local file=$1 6 | local pkg=$2 7 | local module=$3 8 | refcount=$(dpkg-query -f '${db:Status-Abbrev} ${binary:Package}\n' \ 9 | -W $pkg | grep '^i' | wc -l) 10 | if [ "$refcount" -gt 0 ] ; then 11 | # package is installed for other architectures still, do nothing 12 | return 13 | fi 14 | echo "Checking NSS setup..." 15 | # abort if file does not exist 16 | if ! [ -e $file ]; then 17 | echo "Could not find ${file}." 18 | return 19 | fi 20 | # we must remove possible [foo=bar] options as well 21 | sed -i -r "/(passwd|shadow):/ s/[[:space:]]+$module\b([[:space:]]*\[[^]]*\])*//" $file 22 | } 23 | 24 | if [ "$1" = remove ]; then 25 | remove_nss_entry /etc/nsswitch.conf libnss-aad aad 26 | fi 27 | 28 | #DEBHELPER# 29 | -------------------------------------------------------------------------------- /debian/rules: -------------------------------------------------------------------------------- 1 | #!/usr/bin/make -f 2 | %: 3 | dh $@ 4 | 5 | override_dh_auto_install: 6 | mkdir -p $$(pwd)/usr/lib 7 | cp -a libnss_aad.so.2 $$(pwd)/usr/lib 8 | 9 | override_dh_auto_clean: 10 | $(MAKE) clean 11 | rm -rf $$(pwd)/usr 12 | 13 | -------------------------------------------------------------------------------- /debian/source/format: -------------------------------------------------------------------------------- 1 | 3.0 (quilt) 2 | -------------------------------------------------------------------------------- /debian/watch: -------------------------------------------------------------------------------- 1 | version=3 2 | https://github.com/CyberNinjas/libnss_aad/archive/([\d+\.]*).tar.gz 3 | -------------------------------------------------------------------------------- /doc/debian.md: -------------------------------------------------------------------------------- 1 | # Debian 2 | 3 | ## Dependencies 4 | 5 | To install on Debian, the following package repository, 6 | must be installed: 7 | 8 | - [Azure Active Directory for Debian][bintray] 9 | - [Debian Sid][sid] 10 | 11 | This can be installed via the following command: 12 | 13 | ```terminal 14 | # Debian Sid 15 | echo "deb http://http.us.debian.org/debian sid main" >> /etc/apt/sources.list 16 | 17 | # Azure Active Directory for Debian 18 | echo "deb https://dl.bintray.com/jnchi/aad unstable main" | tee -a /etc/apt/sources.list.d/aad.list 19 | ``` 20 | 21 | ## Installation 22 | 23 | ```terminal 24 | apt update && apt install -y libnss-aad 25 | ``` 26 | 27 | ## Configuration 28 | 29 | The package provided should automatically install the following configuration file: 30 | 31 | - [`/etc/libnss-aad.conf`](../debian/libnss-aad.conf) 32 | 33 | ## Troubleshooting 34 | 35 | If you are unable to add the package repository due to it being served via HTTPS, 36 | support for HTTPS can be installed via the following command: 37 | 38 | ```terminal 39 | apt install -y apt-transport-https 40 | ``` 41 | 42 | If you receive an error regarding the key not being found, 43 | it can be manually added via the following commands: 44 | 45 | ```terminal 46 | # Requires GNU Privacy Guard 47 | apt install -y gnupg2 48 | 49 | # Azure Active Directory for Debian 50 | apt-key adv --keyserver pgp.mit.edu --recv 67FF8700EB10F0B9 51 | ``` 52 | 53 | [bintray]: https://bintray.com/jnchi/aad 54 | [sid]: https://www.debian.org/releases/sid 55 | -------------------------------------------------------------------------------- /doc/index.md: -------------------------------------------------------------------------------- 1 | # libnss-aad 2 | 3 | ## Compiling 4 | 5 | 1) Fetch source code: 6 | 7 | ```terminal 8 | git clone https://github.com/CyberNinjas/libnss_aad 9 | 10 | cd libnss_aad 11 | ``` 12 | 13 | 2) Compile: 14 | 15 | ```terminal 16 | make 17 | ``` 18 | 19 | 4) Install: 20 | 21 | ```terminal 22 | sudo make install 23 | ``` 24 | 25 | ## Configuration 26 | 27 | 1) Azure: 28 | 29 | - Login to the [Microsoft Azure Portal](portal.azure.com). 30 | 31 | - In the sidebar on the left, navigate to "Azure Active Directory", then choose "App registrations (Preview)", then select "New registration". 32 | 33 | - Choose a Name e.g. `Name Service Switch for Azure Active Directory`. 34 | 35 | - For Supported account types select `Accounts in this organizational directory only (Organization Name)`. 36 | 37 | - Next click "Register", down at the bottom. 38 | 39 | - From the "Overview" page, under "Manage", select "Authentication". 40 | 41 | - For "Supported account types": 42 | 43 | - Select `Accounts in this organizational directory only (Organization Name)`. 44 | 45 | - Next, click "Save", back up near the top. 46 | 47 | - From the "Overview" page, under "Manage", select "API permissions". 48 | 49 | - Delete any existing permissions (The delegated permission, `Microsoft Graph (1)`, `User.Read` seems to be added by default). 50 | 51 | **NOTE: This module makes use of the `Windows Azure Active Directory` API, not the `Microsoft Graph` API** (pam_aad - [#8](https://github.com/CyberNinjas/pam_aad/issues/8), deprecation notice - [#2](https://github.com/CyberNinjas/libnss_aad/issues/2)). 52 | 53 | - Select "Add a permission", then under "Supported legacy APIs", choose `Azure Active Directory Graph`. 54 | 55 | - Choose "Application permissions". 56 | 57 | - Under "Select permissions", choose `Directory.Read.All`. 58 | 59 | 2) NSS: 60 | 61 | *These instructions assume that the host system is either Debian or one of its derivatives.* 62 | 63 | `/etc/libnss-aad.conf` 64 | 65 | ```mustache 66 | { 67 | "client": { 68 | "id": "{{client_id}}", 69 | "secret": "{{client_secret}}" 70 | }, 71 | "domain": "{{domain}}", 72 | "user": { 73 | "group": "users", 74 | "shell": "/bin/bash" 75 | }, 76 | "debug": true # to optionally enable debugging mode 77 | } 78 | ``` 79 | 80 | **NOTE: For now, `client.secret` must be URL-encoded.** 81 | 82 | `/etc/nsswitch.conf` 83 | 84 | ``` 85 | passwd: compat aad 86 | group: compat 87 | shadow: compat aad 88 | ``` 89 | 90 | ## Tools 91 | 92 | **Syntax Checking and Code Formatting** 93 | 94 | ```terminal 95 | cp .githooks/pre-commit.sh .git/hooks/pre-commit 96 | chmod +x .git/hooks/pre-commit 97 | ``` 98 | 99 | ### Docker 100 | 101 | **Building the container** 102 | 103 | ```terminal 104 | docker build . -t cyberninjas/libnss_aad 105 | ``` 106 | 107 | **Running the container** 108 | 109 | ```terminal 110 | docker run -it cyberninjas/libnss_aad /bin/bash 111 | ``` 112 | 113 | **Running the container with local git repository mounted** 114 | 115 | ```terminal 116 | docker run -v $(pwd):/usr/src/libnss_aad -it cyberninjas/libnss_aad /bin/bash 117 | ``` 118 | 119 | **NOTE: Running `gdb`, or `strace` in the container requires usage of the `--privileged` flag.** 120 | 121 | - [Docker run reference](https://docs.docker.com/engine/reference/run) 122 | 123 | ### getent 124 | 125 | gentent passwd $(whoami) 126 | 127 | - [getent](https://en.wikipedia.org/wiki/Getent) 128 | 129 | ### id 130 | 131 | id $(whoami) 132 | 133 | - [id: Print user identity](https://www.gnu.org/software/coreutils/manual/coreutils.html#id-invocation) 134 | 135 | ## Resources 136 | 137 | - [Azure Active Directory Documentation](https://docs.microsoft.com/en-us/azure/active-directory) 138 | 139 | - [Service to service calls using client credentials (shared secret or certificate)](https://docs.microsoft.com/en-us/azure/active-directory/develop/v1-oauth2-client-creds-grant-flow) 140 | 141 | - [Azure AD v2.0 Protocols (Postman Collection)](https://app.getpostman.com/view-collection/8f5715ec514865a07e6a?referrer=https%3A%2F%2Fapp.getpostman.com%2Frun-collection%2F8f5715ec514865a07e6a) 142 | 143 | - [System Databases and Name Service Switch](https://www.gnu.org/software/libc/manual/html_node/Name-Service-Switch.html) 144 | 145 | ## See also 146 | 147 | - [puppet-aad](https://github.com/Jnchi/puppet-aad) 148 | -------------------------------------------------------------------------------- /doc/ubuntu.md: -------------------------------------------------------------------------------- 1 | # Ubuntu 2 | 3 | ## Dependencies 4 | 5 | To install on Ubuntu, the following personal package archives (PPAs), 6 | must be installed: 7 | 8 | - [Simple Dynamic Strings][sds-ppa] 9 | - [Azure Active Directory for Linux][jnchi-ppa] 10 | 11 | These can be installed via the following commands: 12 | 13 | ```terminal 14 | # Simple Dynamic Strings 15 | add-apt-repository ppa:lramage/sds 16 | 17 | # Azure Active Directory for Linux 18 | add-apt-repository ppa:jnchi/ppa 19 | ``` 20 | Note: __Both__ PPA's must be installed in order for all of the dependencies to be met. 21 | 22 | ## Installation 23 | 24 | ```terminal 25 | apt update && apt install -y libnss-aad 26 | ``` 27 | 28 | ## Configuration 29 | 30 | The package provided should automatically install the following configuration file: 31 | 32 | - [`/etc/libnss-aad.conf`](../debian/libnss-aad.conf) 33 | 34 | ## Troubleshooting 35 | 36 | If `add-apt-repository` is missing from your system, i.e., a docker image, 37 | it can be installed via the following command: 38 | 39 | ```terminal 40 | apt install -y software-properties-common 41 | ``` 42 | 43 | If the key for either PPA fails to import properly, 44 | it can be manually added via the following command: 45 | 46 | ```terminal 47 | # Simple Dynamic Strings 48 | apt-key adv --keyserver keyserver.ubuntu.com --recv A2C0BCEBD63BA8C1 49 | 50 | # Azure Active Directory for Linux 51 | apt-key adv --keyserver keyserver.ubuntu.com --recv 68D35504E523B6B5 52 | ``` 53 | 54 | [jnchi-ppa]: https://launchpad.net/~jnchi/+archive/ubuntu/ppa 55 | [sds-ppa]: https://launchpad.net/~lramage/+archive/ubuntu/sds 56 | -------------------------------------------------------------------------------- /docker/amazon/2018.03/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM amazonlinux:2018.03 2 | 3 | RUN yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm \ 4 | && yum update -y && yum group install -y 'Development Tools' \ 5 | && yum install -y \ 6 | autopoint \ 7 | cmake \ 8 | git \ 9 | indent \ 10 | libcurl-devel \ 11 | jansson-devel \ 12 | pam-devel \ 13 | openssl-devel 14 | 15 | WORKDIR /tmp 16 | RUN git clone https://github.com/benmcollins/libjwt && \ 17 | cd libjwt && git checkout tags/v1.10.1 && \ 18 | autoreconf -i && ./configure && make && make install 19 | 20 | # See: https://github.com/antirez/sds/issues/97 21 | WORKDIR /tmp 22 | RUN git clone https://github.com/antirez/sds libsds && \ 23 | cd libsds && git checkout tags/2.0.0 && \ 24 | echo "typedef int sdsvoid;" >> sdsalloc.h && \ 25 | gcc -fPIC -fstack-protector -std=c99 -pedantic -Wall \ 26 | -Werror -shared -o libsds.so.2.0.0 -Wl,-soname=libsds.so.2.0.0 \ 27 | sds.c sds.h sdsalloc.h && \ 28 | cp -a libsds.so.2.0.0 /usr/local/lib/ && \ 29 | ln -s /usr/local/lib/libsds.so.2.0.0 /usr/local/lib/libsds.so && \ 30 | ln -s /usr/local/lib/libsds.so.2.0.0 /usr/local/lib/libsds.so.2 && \ 31 | mkdir -p /usr/local/include/sds && cp -a sds.h /usr/local/include/sds/ 32 | 33 | WORKDIR /tmp 34 | RUN git clone https://github.com/jedisct1/libsodium && \ 35 | cd libsodium && git checkout tags/1.0.17 && \ 36 | ./autogen.sh && ./configure && make && make check && make install 37 | 38 | WORKDIR /usr/src/libnss_aad 39 | COPY . /usr/src/libnss_aad 40 | RUN git submodule update --init --recursive && \ 41 | cd linux-pam && git checkout tags/Linux-PAM-1_1_8 && \ 42 | ./autogen.sh && ./configure --disable-regenerate-docu && \ 43 | cd .. && patch linux-pam/modules/pam_unix/passverify.c \ 44 | .patches/0001-Remove-static-keyword-from-crypt_make_salt.patch && \ 45 | LIB_DIR=/lib64 make -e install 46 | -------------------------------------------------------------------------------- /docker/amazon/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM amazonlinux:2 2 | 3 | RUN yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm \ 4 | && yum update -y && yum group install -y 'Development Tools' \ 5 | && yum install -y \ 6 | autopoint \ 7 | cmake \ 8 | git \ 9 | indent \ 10 | libcurl-devel \ 11 | jansson-devel \ 12 | pam-devel \ 13 | openssl-devel 14 | 15 | WORKDIR /tmp 16 | RUN git clone https://github.com/benmcollins/libjwt && \ 17 | cd libjwt && git checkout tags/v1.10.1 && \ 18 | autoreconf -i && ./configure && make && make install 19 | 20 | # See: https://github.com/antirez/sds/issues/97 21 | WORKDIR /tmp 22 | RUN git clone https://github.com/antirez/sds libsds && \ 23 | cd libsds && git checkout tags/2.0.0 && \ 24 | echo "typedef int sdsvoid;" >> sdsalloc.h && \ 25 | gcc -fPIC -fstack-protector -std=c99 -pedantic -Wall \ 26 | -Werror -shared -o libsds.so.2.0.0 -Wl,-soname=libsds.so.2.0.0 \ 27 | sds.c sds.h sdsalloc.h && \ 28 | cp -a libsds.so.2.0.0 /usr/local/lib/ && \ 29 | ln -s /usr/local/lib/libsds.so.2.0.0 /usr/local/lib/libsds.so && \ 30 | ln -s /usr/local/lib/libsds.so.2.0.0 /usr/local/lib/libsds.so.2 && \ 31 | mkdir -p /usr/local/include/sds && cp -a sds.h /usr/local/include/sds/ 32 | 33 | WORKDIR /tmp 34 | RUN git clone https://github.com/jedisct1/libsodium && \ 35 | cd libsodium && git checkout tags/1.0.17 && \ 36 | ./autogen.sh && ./configure && make && make check && make install 37 | 38 | WORKDIR /usr/src/libnss_aad 39 | COPY . /usr/src/libnss_aad 40 | RUN make depends && \ 41 | LIB_DIR=/lib64 make -e install 42 | -------------------------------------------------------------------------------- /docker/debian/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM debian:9.7 2 | ARG VERSION 3 | ARG DEBVER 4 | 5 | RUN echo "deb http://http.us.debian.org/debian sid main" \ 6 | >> /etc/apt/sources.list && \ 7 | apt update && apt install -y \ 8 | automake \ 9 | autopoint \ 10 | build-essential \ 11 | cmake \ 12 | curl \ 13 | debhelper \ 14 | devscripts \ 15 | git \ 16 | indent \ 17 | libcurl4-openssl-dev \ 18 | libjansson-dev \ 19 | libjwt-dev \ 20 | libsodium-dev \ 21 | libssl-dev \ 22 | libtool \ 23 | libxcrypt-dev \ 24 | pkg-config \ 25 | quilt 26 | 27 | ENV SDSMIRROR="https://gitlab.com/oxr463/sds/-/jobs/210491217/artifacts/raw" \ 28 | SDSVERSION="2.0.0" SDSDEBVERSION="2.0.0-1" 29 | WORKDIR /tmp 30 | RUN curl -LO "${SDSMIRROR}/libsds${SDSVERSION}_${SDSDEBVERSION}_amd64.deb" && \ 31 | curl -LO "${SDSMIRROR}/libsds-dev_${SDSDEBVERSION}_amd64.deb" && \ 32 | dpkg -i "libsds${SDSVERSION}_${SDSDEBVERSION}_amd64.deb" && \ 33 | dpkg -i "libsds-dev_${SDSDEBVERSION}_amd64.deb" 34 | 35 | WORKDIR /usr/src/libnss_aad 36 | COPY . /usr/src/libnss_aad 37 | RUN tar cvzf "../libnss-aad_${VERSION}.orig.tar.gz" --exclude='.git*' . && \ 38 | debuild -us -uc -i'.git' && \ 39 | dpkg -i "../libnss-aad_${VERSION}-${DEBVER}_amd64.deb" 40 | -------------------------------------------------------------------------------- /docker/ubuntu/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM ubuntu:18.04 2 | ARG VERSION 3 | ARG DEBVER 4 | 5 | RUN echo "deb http://http.us.debian.org/debian sid main" \ 6 | >> /etc/apt/sources.list && \ 7 | apt update && apt install -y \ 8 | automake \ 9 | autopoint \ 10 | build-essential \ 11 | cmake \ 12 | curl \ 13 | debhelper \ 14 | devscripts \ 15 | git \ 16 | indent \ 17 | libcurl4-openssl-dev \ 18 | libjansson-dev \ 19 | libjwt-dev \ 20 | libsodium-dev \ 21 | libssl-dev \ 22 | libtool \ 23 | libxcrypt-dev \ 24 | pkg-config \ 25 | quilt 26 | 27 | ENV SDSMIRROR="https://gitlab.com/oxr463/sds/-/jobs/210491217/artifacts/raw" \ 28 | SDSVERSION="2.0.0" SDSDEBVERSION="2.0.0-1" 29 | WORKDIR /tmp 30 | RUN curl -LO "${SDSMIRROR}/libsds${SDSVERSION}_${SDSDEBVERSION}_amd64.deb" && \ 31 | curl -LO "${SDSMIRROR}/libsds-dev_${SDSDEBVERSION}_amd64.deb" && \ 32 | dpkg -i "libsds${SDSVERSION}_${SDSDEBVERSION}_amd64.deb" && \ 33 | dpkg -i "libsds-dev_${SDSDEBVERSION}_amd64.deb" 34 | 35 | WORKDIR /usr/src/libnss_aad 36 | COPY . /usr/src/libnss_aad 37 | RUN tar cvzf "../libnss-aad_${VERSION}.orig.tar.gz" --exclude='.git*' . && \ 38 | debuild -us -uc -i'.git' && \ 39 | dpkg -i "../libnss-aad_${VERSION}-${DEBVER}_amd64.deb" 40 | RUN apt update && apt install -y \ 41 | software-properties-common && \ 42 | add-apt-repository -y ppa:lramage/sds && \ 43 | add-apt-repository -y ppa:jnchi/ppa 44 | 45 | RUN apt update && apt install -y \ 46 | automake \ 47 | autopoint \ 48 | build-essential \ 49 | cmake \ 50 | curl \ 51 | debhelper \ 52 | devscripts \ 53 | git \ 54 | indent \ 55 | libcurl4-openssl-dev \ 56 | libjansson-dev \ 57 | libjwt-dev \ 58 | libsds-dev \ 59 | libsodium-dev \ 60 | libssl-dev \ 61 | libtool \ 62 | libxcrypt-dev \ 63 | pkg-config \ 64 | quilt 65 | 66 | WORKDIR /usr/src/libnss_aad 67 | COPY . /usr/src/libnss_aad 68 | RUN tar cvzf "../libnss-aad_${VERSION}.orig.tar.gz" --exclude='.git*' . && \ 69 | debuild -us -uc -i'.git' && \ 70 | dpkg -i "../libnss-aad_${VERSION}-${DEBVER}_amd64.deb" 71 | -------------------------------------------------------------------------------- /libnss_aad.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | 21 | #define CONF_FILE "/etc/libnss-aad.conf" 22 | #define MAX_PASSWD_LENGTH 32 23 | #define MIN_GID 1000 24 | #define MIN_UID 1000 25 | #define PASSWD_FILE "/etc/passwd" 26 | #define RESOURCE_ID "00000002-0000-0000-c000-000000000000" 27 | #define SHADOW_FILE "/etc/shadow" 28 | #define SHELL "/bin/sh" 29 | #define USER_AGENT "libnss_aad/1.0" 30 | #define USER_FIELD "mailNickname" 31 | 32 | struct charset { 33 | char const *const c; 34 | uint32_t const l; 35 | }; 36 | 37 | struct response { 38 | char *data; 39 | size_t size; 40 | }; 41 | 42 | static size_t response_callback(void *contents, size_t size, size_t nmemb, 43 | void *userp) 44 | { 45 | size_t realsize = size * nmemb; 46 | struct response *resp = (struct response *) userp; 47 | 48 | char *ptr = realloc(resp->data, resp->size + realsize + 1); 49 | if (ptr == NULL) { 50 | /* out of memory! */ 51 | printf("not enough memory (realloc returned NULL)\n"); 52 | return 0; 53 | } 54 | 55 | resp->data = ptr; 56 | memcpy(&(resp->data[resp->size]), contents, realsize); 57 | resp->size += realsize; 58 | resp->data[resp->size] = 0; 59 | 60 | return realsize; 61 | } 62 | 63 | static char *get_static(char **buffer, size_t *buflen, int len) 64 | { 65 | char *result; 66 | 67 | if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) { 68 | return NULL; 69 | } 70 | 71 | result = *buffer; 72 | *buffer += len; 73 | *buflen -= len; 74 | 75 | return result; 76 | } 77 | 78 | static char *generate_passwd(void) 79 | { 80 | if (sodium_init() < 0) { 81 | fprintf(stderr, "libsodium could not be initialized\n"); 82 | return NULL; 83 | } 84 | 85 | uintmax_t const length = MAX_PASSWD_LENGTH; 86 | 87 | struct charset lower = { 88 | "abcdefghijklmnopqrstuvwxyz", 89 | (uint32_t) strlen(lower.c) 90 | }; 91 | 92 | struct charset numeric = { 93 | "0123456789", 94 | (uint32_t) strlen(numeric.c) 95 | }; 96 | 97 | struct charset special = { 98 | "!@#$%^&*()-_=+`~[]{}\\|;:'\",.<>/?", 99 | (uint32_t) strlen(special.c) 100 | }; 101 | 102 | struct charset upper = { 103 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 104 | (uint32_t) strlen(upper.c) 105 | }; 106 | 107 | uint32_t const chars_l = lower.l + numeric.l + special.l + upper.l; 108 | 109 | char *const chars = malloc(chars_l + 1); 110 | 111 | if (chars == NULL) { 112 | fprintf(stderr, "failed to allocate memory for string\n"); 113 | return NULL; 114 | } 115 | 116 | chars[0] = '\0'; 117 | 118 | char *endptr = chars; 119 | 120 | char *passwd = (char *) malloc((length + 1) * sizeof(char)); 121 | 122 | if (passwd == NULL) { 123 | fprintf(stderr, "failed to allocate memory for string\n"); 124 | return NULL; 125 | } 126 | 127 | memcpy(endptr, lower.c, lower.l); 128 | endptr += lower.l; 129 | 130 | memcpy(endptr, numeric.c, numeric.l); 131 | endptr += numeric.l; 132 | 133 | memcpy(endptr, special.c, special.l); 134 | endptr += special.l; 135 | 136 | memcpy(endptr, upper.c, upper.l); 137 | 138 | for (uintmax_t i = 0; i < length; ++i) { 139 | passwd[i] = chars[randombytes_uniform(chars_l)]; 140 | } 141 | 142 | passwd[length + 1] = '\0'; 143 | 144 | free(chars); 145 | 146 | char entropy[16]; 147 | int fd; 148 | 149 | fd = open("/dev/urandom", O_RDONLY); 150 | 151 | if (fd < 0) { 152 | printf("Can't open /dev/urandom\n"); 153 | return NULL; 154 | } 155 | 156 | if (read(fd, entropy, sizeof(entropy)) != sizeof(entropy)) { 157 | printf("Not enough entropy\n"); 158 | return NULL; 159 | } 160 | 161 | close(fd); 162 | 163 | return xcrypt(passwd, 164 | xcrypt_gensalt("$2a$", 12, entropy, sizeof(entropy))); 165 | } 166 | 167 | static json_t *get_oauth2_token(const char *client_id, 168 | const char *client_secret, 169 | const char *domain, bool debug) 170 | { 171 | CURL *curl_handle; 172 | CURLcode res; 173 | json_t *token_data, *token; 174 | json_error_t error; 175 | struct response resp; 176 | 177 | resp.data = malloc(1); 178 | resp.size = 0; 179 | 180 | /* https://login.microsoftonline.com//oauth2/token */ 181 | sds endpoint = sdsnew("https://login.microsoftonline.com/"); 182 | endpoint = sdscat(endpoint, domain); 183 | endpoint = sdscat(endpoint, "/oauth2/token"); 184 | 185 | sds post_body = sdsnew("grant_type=client_credentials&client_secret="); 186 | post_body = sdscat(post_body, client_secret); 187 | post_body = sdscat(post_body, "&client_id="); 188 | post_body = sdscat(post_body, client_id); 189 | post_body = sdscat(post_body, "&resource="); 190 | post_body = sdscat(post_body, RESOURCE_ID); 191 | 192 | curl_handle = curl_easy_init(); 193 | curl_easy_setopt(curl_handle, CURLOPT_URL, endpoint); 194 | curl_easy_setopt(curl_handle, CURLOPT_POSTFIELDS, post_body); 195 | curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, 196 | response_callback); 197 | curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *) &resp); 198 | curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, USER_AGENT); 199 | 200 | if (debug) 201 | curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L); 202 | 203 | res = curl_easy_perform(curl_handle); 204 | 205 | /* check for errors */ 206 | if (res != CURLE_OK) { 207 | fprintf(stderr, "curl_easy_perform() failed: %s\n", 208 | curl_easy_strerror(res)); 209 | } else { 210 | token_data = json_loads(resp.data, 0, &error); 211 | 212 | if (!token_data) { 213 | fprintf(stderr, "json_loads() failed: %s\n", error.text); 214 | return NULL; 215 | } 216 | } 217 | 218 | curl_easy_cleanup(curl_handle); 219 | sdsfree(endpoint); 220 | sdsfree(post_body); 221 | free(resp.data); 222 | 223 | token = json_object_get(token_data, "access_token"); 224 | return (token) ? token : NULL; 225 | } 226 | 227 | static int verify_user(json_t * auth_token, const char *domain, 228 | const char *name, bool debug) 229 | { 230 | CURL *curl_handle; 231 | CURLcode res; 232 | json_t *user_data; 233 | json_error_t error; 234 | sds auth_header = sdsnew("Authorization: Bearer "); 235 | sds endpoint = sdsnew("https://graph.windows.net/"); 236 | struct response resp; 237 | struct curl_slist *headers = NULL; 238 | const char *user_field; 239 | 240 | resp.data = malloc(1); 241 | resp.size = 0; 242 | 243 | auth_header = sdscat(auth_header, json_string_value(auth_token)); 244 | headers = curl_slist_append(headers, auth_header); 245 | 246 | /* https://graph.windows.net//users/@?api-version=1.6 */ 247 | endpoint = sdscat(endpoint, domain); 248 | endpoint = sdscat(endpoint, "/users/"); 249 | endpoint = sdscat(endpoint, name); 250 | endpoint = sdscat(endpoint, "@"); 251 | endpoint = sdscat(endpoint, domain); 252 | endpoint = sdscat(endpoint, "?api-version=1.6"); 253 | 254 | curl_handle = curl_easy_init(); 255 | curl_easy_setopt(curl_handle, CURLOPT_URL, endpoint); 256 | curl_easy_setopt(curl_handle, CURLOPT_HTTPHEADER, headers); 257 | curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, 258 | response_callback); 259 | curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, (void *) &resp); 260 | curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, USER_AGENT); 261 | curl_easy_setopt(curl_handle, CURLOPT_SSL_VERIFYPEER, 1L); 262 | 263 | if (debug) 264 | curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L); 265 | 266 | res = curl_easy_perform(curl_handle); 267 | 268 | 269 | if (res != CURLE_OK) { 270 | fprintf(stderr, "curl_easy_perform() failed: %s\n", 271 | curl_easy_strerror(res)); 272 | } else { 273 | user_data = json_loads(resp.data, 0, &error); 274 | 275 | if (!user_data) { 276 | fprintf(stderr, "json_loads() failed: %s\n", error.text); 277 | return EXIT_FAILURE; 278 | } 279 | 280 | if (json_object_get(user_data, "odata.error")) { 281 | fprintf(stderr, "returned odata.error\n"); 282 | return EXIT_FAILURE; 283 | } 284 | } 285 | 286 | curl_easy_cleanup(curl_handle); 287 | curl_slist_free_all(headers); 288 | sdsfree(auth_header); 289 | sdsfree(endpoint); 290 | free(resp.data); 291 | 292 | user_field = json_string_value(json_object_get(user_data, USER_FIELD)); 293 | return (user_field 294 | && strcmp(user_field, 295 | name) == 0) ? EXIT_SUCCESS : EXIT_FAILURE; 296 | } 297 | 298 | static int write_entry(const char *fp, void *userp) 299 | { 300 | int ret = EXIT_FAILURE; 301 | FILE *fd = fopen(fp, "a"); 302 | if (fd) { 303 | fseek(fd, 0, SEEK_END); 304 | if (strcmp(fp, PASSWD_FILE) == 0) { 305 | struct passwd *p = (struct passwd *) userp; 306 | ret = putpwent(p, fd); 307 | } 308 | 309 | if (strcmp(fp, SHADOW_FILE) == 0) { 310 | struct spwd *s = (struct spwd *) userp; 311 | ret = putspent(s, fd); 312 | } 313 | fclose(fd); 314 | } 315 | return ret; 316 | } 317 | 318 | enum nss_status _nss_aad_getpwnam_r(const char *name, struct passwd *p, 319 | char *buffer, size_t buflen, 320 | int *errnop) 321 | { 322 | bool debug = false; 323 | const char *client_id, *client_secret, *domain, *shell; 324 | json_t *config, *client, *shell_cfg, *token, *user_cfg; 325 | json_error_t error; 326 | int ret = 0, user_id = MIN_UID; 327 | sds home_dir = sdsnew("/home/"); 328 | struct group *group; 329 | struct passwd *user; 330 | 331 | (void) (errnop); /* unused-parameter */ 332 | 333 | config = json_load_file(CONF_FILE, 0, &error); 334 | if (!config) { 335 | fprintf(stderr, "error in config on line %d: %s\n", error.line, 336 | error.text); 337 | return NSS_STATUS_NOTFOUND; 338 | } 339 | 340 | if (json_object_get(config, "debug")) 341 | if (strcmp 342 | (json_string_value(json_object_get(config, "debug")), 343 | "true") == 0) 344 | debug = true; 345 | 346 | if (json_object_get(config, "client")) { 347 | client = json_object_get(config, "client"); 348 | } else { 349 | fprintf(stderr, "error with Client in JSON\n"); 350 | return ret; 351 | } 352 | 353 | if (json_object_get(client, "id")) { 354 | client_id = json_string_value(json_object_get(client, "id")); 355 | } else { 356 | fprintf(stderr, "error with Client ID in JSON\n"); 357 | return ret; 358 | } 359 | 360 | if (json_object_get(client, "secret")) { 361 | client_secret = 362 | json_string_value(json_object_get(client, "secret")); 363 | } else { 364 | fprintf(stderr, "error with Client Secret in JSON\n"); 365 | return ret; 366 | } 367 | 368 | if (json_object_get(config, "domain")) { 369 | domain = json_string_value(json_object_get(config, "domain")); 370 | } else { 371 | fprintf(stderr, "error with Domain in JSON\n"); 372 | return ret; 373 | } 374 | 375 | if (json_object_get(config, "user")) { 376 | user_cfg = json_object_get(config, "user"); 377 | } else { 378 | fprintf(stderr, "error with User in JSON\n"); 379 | return ret; 380 | } 381 | 382 | user = getpwuid(user_id); 383 | 384 | if (json_object_get(user_cfg, "group")) { 385 | group = 386 | getgrnam(json_string_value 387 | (json_object_get(user_cfg, "group"))); 388 | } else { 389 | fprintf(stderr, "error with Group in JSON\n"); 390 | return ret; 391 | } 392 | 393 | if (json_object_get(user_cfg, "shell")) { 394 | shell_cfg = json_object_get(user_cfg, "shell"); 395 | } 396 | 397 | shell = (shell_cfg) ? json_string_value(shell_cfg) : sdsnew(SHELL); 398 | if (!shell) { 399 | fprintf(stderr, "error with Shell in JSON\n"); 400 | return ret; 401 | } 402 | 403 | home_dir = sdscat(home_dir, name); 404 | if (!home_dir) { 405 | fprintf(stderr, "error with HOME directory\n"); 406 | return ret; 407 | } 408 | 409 | curl_global_init(CURL_GLOBAL_ALL); 410 | 411 | token = get_oauth2_token(client_id, client_secret, domain, debug); 412 | 413 | ret = verify_user(token, domain, name, debug); 414 | 415 | curl_global_cleanup(); 416 | 417 | if (!ret) { 418 | if ((p->pw_name = 419 | get_static(&buffer, &buflen, strlen(name) + 1)) == NULL) 420 | return NSS_STATUS_TRYAGAIN; 421 | 422 | strcpy(p->pw_name, name); 423 | 424 | if ((p->pw_passwd = 425 | get_static(&buffer, &buflen, strlen("x") + 1)) == NULL) 426 | return NSS_STATUS_TRYAGAIN; 427 | 428 | strcpy(p->pw_passwd, "x"); 429 | 430 | while (user != NULL) { 431 | user = getpwuid(++user_id); 432 | } 433 | p->pw_uid = user_id; 434 | 435 | p->pw_gid = (group) ? group->gr_gid : MIN_GID; 436 | 437 | if ((p->pw_gecos = 438 | get_static(&buffer, &buflen, strlen("\0") + 1)) == NULL) 439 | return NSS_STATUS_TRYAGAIN; 440 | 441 | strcpy(p->pw_gecos, "\0"); 442 | 443 | if ((p->pw_dir = 444 | get_static(&buffer, &buflen, strlen(home_dir) + 1)) == NULL) 445 | return NSS_STATUS_TRYAGAIN; 446 | 447 | strcpy(p->pw_dir, home_dir); 448 | 449 | if ((p->pw_shell = 450 | get_static(&buffer, &buflen, strlen(shell) + 1)) == NULL) 451 | return NSS_STATUS_TRYAGAIN; 452 | 453 | strcpy(p->pw_shell, shell); 454 | 455 | write_entry(PASSWD_FILE, p); 456 | 457 | return NSS_STATUS_SUCCESS; 458 | } 459 | 460 | return NSS_STATUS_TRYAGAIN; 461 | } 462 | 463 | enum nss_status _nss_aad_getspnam_r(const char *name, struct spwd *s, 464 | char *buffer, size_t buflen, 465 | int *errnop) 466 | { 467 | (void) (errnop); /* unused-parameter */ 468 | 469 | /* If out of memory */ 470 | if ((s->sp_namp = 471 | get_static(&buffer, &buflen, strlen(name) + 1)) == NULL) { 472 | return NSS_STATUS_TRYAGAIN; 473 | } 474 | 475 | strcpy(s->sp_namp, name); 476 | 477 | if ((s->sp_pwdp = 478 | get_static(&buffer, &buflen, MAX_PASSWD_LENGTH + 1)) == NULL) { 479 | return NSS_STATUS_TRYAGAIN; 480 | } 481 | 482 | char *passwd = generate_passwd(); 483 | if (passwd == NULL) 484 | return NSS_STATUS_TRYAGAIN; 485 | 486 | strcpy(s->sp_pwdp, passwd); 487 | 488 | write_entry(SHADOW_FILE, s); 489 | 490 | s->sp_lstchg = 13571; 491 | s->sp_min = 0; 492 | s->sp_max = 99999; 493 | s->sp_warn = 7; 494 | 495 | return NSS_STATUS_SUCCESS; 496 | } 497 | -------------------------------------------------------------------------------- /scripts/docker.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | set -eu 3 | 4 | # Recursively build docker images 5 | recursive_build() { 6 | path=$1 7 | tag=$2 8 | release=$3 9 | extra=$4 10 | for dir in $path/docker/*; do 11 | if [ -d "${dir}" ]; then 12 | distro=$(basename "${dir}") 13 | 14 | if [ "${distro}" = "amazon" ]; then 15 | continue # FIXME, (See: https://github.com/CyberNinjas/libnss_aad/commit/97304f5f00ff88f65a6d9078f2b9baa6509da9d7). 16 | fi 17 | 18 | image="${tag}:${distro}" # org/image:tag 19 | if [ ! -z "${extra}" ]; then 20 | image="${tag}:${distro}-${extra}" # org/image:tag-extra 21 | fi 22 | docker build --build-arg VERSION="${release}" \ 23 | --build-arg DEBVER=1 \ 24 | -t "${image}" "${path}" \ 25 | -f "${dir}/Dockerfile" 26 | fi 27 | done 28 | } 29 | 30 | main() { 31 | DEFAULT_IMAGE="cyberninjas/libnss_aad" 32 | export RELEASE=$(git describe --tags $(git rev-list --tags --max-count=1)) 33 | 34 | # Build all docker images 35 | recursive_build . "${DEFAULT_IMAGE}" "${RELEASE}" '' 36 | 37 | # Build all testing docker images 38 | recursive_build ./test "${DEFAULT_IMAGE}" "${RELEASE}" 'testing' 39 | 40 | sed "s/{{version}}/${VERSION}/" .bintray.json.in > bintray.json 41 | } 42 | 43 | main 44 | -------------------------------------------------------------------------------- /test/Makefile: -------------------------------------------------------------------------------- 1 | PREFIX = /usr/local 2 | LIB_DIR = ${PREFIX}/lib 3 | 4 | all: dlopen 5 | 6 | dlopentest: 7 | ${CC} ${CFLAGS} ${LDFLAGS} -fPIE -fstack-protector -Wall -o $@ $@.c -ldl 8 | 9 | dlopen: dlopentest 10 | ./dlopentest "${LIB_DIR}/libnss_aad.so.2" 11 | -------------------------------------------------------------------------------- /test/dlopentest.c: -------------------------------------------------------------------------------- 1 | /* 2 | * This test ensures the integrity of the compiled NSS module, 3 | * by attempting to dlopen the module, and checking for the 4 | * required symbols needed for an NSS module. 5 | */ 6 | #include 7 | #include 8 | #include 9 | 10 | int main(int argc, const char *argv[]) 11 | { 12 | if (argc != 2) { 13 | printf("Usage: ./dlopentest \n"); 14 | exit(1); 15 | } 16 | 17 | void *libhandle = dlopen(argv[1], RTLD_NOW); 18 | if (libhandle == NULL) { 19 | printf("%s\n", dlerror()); 20 | exit(1); 21 | } 22 | void *sym = dlsym(libhandle, "getpwnam_r"); 23 | if (sym == NULL) { 24 | printf("%s\n", dlerror()); 25 | exit(1); 26 | } 27 | sym = dlsym(libhandle, "getspnam_r"); 28 | if (sym == NULL) { 29 | printf("%s\n", dlerror()); 30 | exit(1); 31 | } 32 | dlclose(libhandle); 33 | 34 | return EXIT_SUCCESS; 35 | } 36 | --------------------------------------------------------------------------------