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Yubico C client library
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Introduction to Yubikey client C library ======================================== Introduction ------------ This is a library written in C to validate a Yubikey OTP against the Yubico online server. Description of included files: * AUTHORS, COPYING, NEWS, README: meta-information about the project. * ykclient.h, ykclient.c: Implementation of the library. * tool.c: Source for command line tool "ykclient" to validate an OTP. * selftest.c: Self tests of the library. * simple.mk: Simple makefile to build the above parts. * configure.ac, Makefile.am: Autoconf/Automake files. Building from Git ----------------- Skip to the next section if you are using an official packaged version. You may check out the sources using Git with the following command: ----------- $ git clone git://github.com/Yubico/yubico-c-client.git ----------- This will create a directory 'yubico-c-client'. Enter the directory: ----------- $ cd yubico-c-client ----------- Autoconf, automake and libtool must be installed. Generate the build system using: ----------- $ autoreconf --install ----------- Building -------- To build using the Autoconf, automake and libtool infrastructure, which is recommend for more advanced purposes especially for cross-compilation and shared library support, build it as follows. ----------- $ ./configure $ make check install ----------- Another way to build the package is by running 'make -f simple.mk check'. It will build each component, and also test it. See below for sample session. This is useful if you want to target a platform that doesn't support Autoconf/automake/libtool well. ----------- jas@mocca:~/src/yubico-c-client$ make -f simple.mk check cc -I. -Wall -g -DPACKAGE=\"ykclient\" -DPACKAGE_VERSION=\"0\" -c -o ykclient.o ykclient.c cc -lcurl ykclient.o tool.c -o ykclient cc -I. -Wall -g -DPACKAGE=\"ykclient\" -DPACKAGE_VERSION=\"0\" -lcurl selftest.c ykclient.o -o selftest ./selftest ykclient_init (0): Success ykclient_request (2): Yubikey OTP was replayed (REPLAYED_OTP) yubikey_request (2): Yubikey OTP was replayed (REPLAYED_OTP) strerror(0): Success strerror(BAD_OTP): Yubikey OTP was bad (BAD_OTP) jas@mocca:~/src/yubico-c-client$ ----------- Command-line tools ------------------ There is one command line tool, ykclient, to validate a particular OTP. It needs a client id, which you can allocate for yourself on Yubico's web site. Example session below. ----------- jas@mocca:~/src/yubico-c-client$ ./ykclient Usage: ./ykclient <client_id> <yubikey_otp> CLIENT_ID: your client id integer YUBIKEY_OTP: One-time password generated by yubikey jas@mocca:~/src/yubico-c-client$ ./ykclient 16 dteffujehknhfjbrjnlnldnhcujvddbikngjrtgh Input: client id: 16 token: dteffujehknhfjbrjnlnldnhcujvddbikngjrtgh Verification output (2): Yubikey OTP was replayed (REPLAYED_OTP) jas@mocca:~/src/yubico-c-client$ ----------- Questions? ---------- Talk to <simon@yubico.com>.
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