The Yubico PIV tool is used for interacting with the Privilege and Identification Card (PIV) application on a YubiKey.

With it you may generate keys on the device, importing keys and certificates, and create certificate requests, and other operations. A shared library and a command-line tool is included.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

After downloading and unpacking the package tarball, you build it as follows.

The backend to use is decided at compile time, see the summary at the end of the ./configure output. Use --with-backend=foo to chose backend, replacing foo with the backend you want to use. The backends available are "pcsc", "macscard", and "winscard" using the PCSC interface, with slightly different shared library linkage and header file names: "pcsc" is used under GNU-like systems, "macscard" under Mac OS X, and "winscard" is used under Windows. In most situations, running ./configure should automatically find the proper backend to use.

Recent versions of autoconf, automake, pkg-config and libtool must be installed. Help2man is used to generate the manpages. Gengetopt version 2.22.6 or later is needed for command line parameter handling.

Generate the build system using:

Then you follow the normal build instructions, see above. To turn on all warnings add --enable-gcc-warnings to ./configure

The main development platform is Debian GNU/Linux. The project is cross-compiled to Windows using MinGW (see windows.mk) using the PCSC backend. It may also be built for Mac OS X (see mac.mk), also using the PCSC backend.

For a list of all available options --help can be given. For more information on exactly what happens --verbose or --verbose=2 may be added.

Generate a new ECC-P256 key on device in slot 9a, will print the public key on stdout:

Generate a certificate request with public key from stdin, will print the resulting request on stdout:

Generate a self-signed certificate with public key from stdin, will print the certificate, for later import, on stdout:

Import a certificate from stdin:

Set a random chuid, import a key and import a certificate from a PKCS12 file with password test, into slot 9c:

Change the management key used for administrative authentication:

Delete a certificate in slot 9a:

Show some information on certificates and other data:

Read out the certificate from a slot and then run a signature test:

Import a key into slot 85 (only available on YubiKey 4) and set the touch policy (also only available on YubiKey 4):