yubico-piv-tool [OPTIONS]…


-h, --help

Print help and exit


Print help, including hidden options, and exit

-V, --version

Print version and exit

-v, --verbose[=INT]

Print more information (default=‘0’)

-r, --reader=STRING

Only use a matching reader (default=‘Yubikey’)

-k, --key[=STRING]

Management key to use, if no value is specified key will be asked for (default=‘010203040506070801020304050607080102030405060708’)

-a, --action=ENUM

Action to take (possible values="version", "generate", "set-mgm-key", "reset", "pin-retries", "import-key", "import-certificate", "set-chuid", "request-certificate", "verify-pin", "change-pin", "change-puk", "unblock-pin", "selfsign-certificate", "delete-certificate", "read-certificate", "status", "test-signature", "test-decipher", "list-readers", "set-ccc", "write-object", "read-object", "attest")

Multiple actions may be given at once and will be executed in order for example --action=verify-pin --action=request-certificate

-s, --slot=ENUM

What key slot to operate on (possible values="9a", "9c", "9d", "9e", "82", "83", "84", "85", "86", "87", "88", "89", "8a", "8b", "8c", "8d", "8e", "8f", "90", "91", "92", "93", "94", "95", "f9")

9a is for PIV Authentication 9c is for Digital Signature (PIN always checked) 9d is for Key Management 9e is for Card Authentication (PIN never checked) 82-95 is for Retired Key Management f9 is for Attestation

-A, --algorithm=ENUM

What algorithm to use (possible values="RSA1024", "RSA2048", "ECCP256", "ECCP384" default=‘RSA2048’)

-H, --hash=ENUM

Hash to use for signatures (possible values="SHA1", "SHA256", "SHA384", "SHA512" default=‘SHA256’)

-n, --new-key=STRING

New management key to use for action set-mgm-key, if omitted key will be asked for


Number of retries before the pin code is blocked


Number of retries before the puk code is blocked

-i, --input=STRING

Filename to use as input, - for stdin (default=‘-’)

-o, --output=STRING

Filename to use as output, - for stdout (default=‘-’)

-K, --key-format=ENUM

Format of the key being read/written (possible values="PEM", "PKCS12", "GZIP", "DER", "SSH" default=‘PEM’)

-p, --password=STRING

Password for decryption of private key file, if omitted password will be asked for

-S, --subject=STRING

The subject to use for certificate request

The subject must be written as: /


Serial number of the self-signed certificate


Time (in days) until the self-signed certificate expires (default=‘365’)

-P, --pin=STRING

Pin/puk code for verification, if omitted pin/puk will be asked for

-N, --new-pin=STRING

New pin/puk code for changing, if omitted pin/puk will be asked for


Set pin policy for action generate or import-key. Only available on YubiKey 4 (possible values="never", "once", "always")


Set touch policy for action generate, import-key or set-mgm-key. Only available on YubiKey 4 (possible values="never", "always", "cached")


Id of object for write/read object

-f, --format=ENUM

Format of data for write/read object (possible values="hex", "base64", "binary" default=‘hex’)


Add attestation cross-signature (default=off)


For more information about what’s happening --verbose can be added to any command. For much more information --verbose=2 may be used.

Display what version of the application is running on the YubiKey:

yubico-piv-tool -aversion

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

yubico-piv-tool -s9a -AECCP256 -agenerate

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

yubico-piv-tool -s9a -S'/CN=foo/OU=test/' -averify \

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

yubico-piv-tool -s9a -S'/CN=bar/OU=test/' -averify \

Import a certificate from stdin:

yubico-piv-tool -s9a -aimport-certificate

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

yubico-piv-tool -s9c -itest.pfx -KPKCS12 -aset-chuid \
  -aimport-key -aimport-cert

Import a certificate which is larger than 2048 bytes and thus requires compression in order to fit:

openssl x509 -in cert.pem -outform DER | gzip -9 > der.gz
yubico-piv-tool -s9c -ider.gz -KGZIP -aimport-cert

Change the management key used for administrative authentication:

yubico-piv-tool -aset-mgm-key

Delete a certificate in slot 9a, with management key being asked for:

yubico-piv-tool -adelete-certificate -s9a -k

Show some information on certificates and other data:

yubico-piv-tool -astatus

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

yubico-piv-tool -aread-cert -s9a
yubico-piv-tool -averify-pin -atest-signature -s9a

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

yubico-piv-tool -aimport-key -s85 --touch-policy=always -ikey.pem