from small one page howto to huge articles all in one place
 

search text in:





Poll
Which filesystem do you use?






poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

186354

userrating:

average rating: 1.7 (102 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

250360

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

137536

userrating:

average rating: 1.4 (42 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





SPKAC

Section: OpenSSL (1)
Updated: 2017-05-25
Index Return to Main Contents
 

NAME

spkac - SPKAC printing and generating utility  

SYNOPSIS

openssl spkac [-in filename] [-out filename] [-key keyfile] [-passin arg] [-challenge string] [-pubkey] [-spkac spkacname] [-spksect section] [-noout] [-verify] [-engine id]  

DESCRIPTION

The spkac command processes Netscape signed public key and challenge (SPKAC) files. It can print out their contents, verify the signature and produce its own SPKACs from a supplied private key.  

COMMAND OPTIONS

-in filename
This specifies the input filename to read from or standard input if this option is not specified. Ignored if the -key option is used.
-out filename
specifies the output filename to write to or standard output by default.
-key keyfile
create an SPKAC file using the private key in keyfile. The -in, -noout, -spksect and -verify options are ignored if present.
-passin password
the input file password source. For more information about the format of arg see the PASS PHRASE ARGUMENTS section in openssl(1).
-challenge string
specifies the challenge string if an SPKAC is being created.
-spkac spkacname
allows an alternative name form the variable containing the SPKAC. The default is ``SPKAC''. This option affects both generated and input SPKAC files.
-spksect section
allows an alternative name form the section containing the SPKAC. The default is the default section.
-noout
don't output the text version of the SPKAC (not used if an SPKAC is being created).
-pubkey
output the public key of an SPKAC (not used if an SPKAC is being created).
-verify
verifies the digital signature on the supplied SPKAC.
-engine id
specifying an engine (by its unique id string) will cause spkac to attempt to obtain a functional reference to the specified engine, thus initialising it if needed. The engine will then be set as the default for all available algorithms.
 

EXAMPLES

Print out the contents of an SPKAC:

 openssl spkac -in spkac.cnf

Verify the signature of an SPKAC:

 openssl spkac -in spkac.cnf -noout -verify

Create an SPKAC using the challenge string ``hello'':

 openssl spkac -key key.pem -challenge hello -out spkac.cnf

Example of an SPKAC, (long lines split up for clarity):

 SPKAC=MIG5MGUwXDANBgkqhkiG9w0BAQEFAANLADBIAkEA1cCoq2Wa3Ixs47uI7F\
 PVwHVIPDx5yso105Y6zpozam135a8R0CpoRvkkigIyXfcCjiVi5oWk+6FfPaD03u\
 PFoQIDAQABFgVoZWxsbzANBgkqhkiG9w0BAQQFAANBAFpQtY/FojdwkJh1bEIYuc\
 2EeM2KHTWPEepWYeawvHD0gQ3DngSC75YCWnnDdq+NQ3F+X4deMx9AaEglZtULwV\
 4=

 

NOTES

A created SPKAC with suitable DN components appended can be fed into the ca utility.

SPKACs are typically generated by Netscape when a form is submitted containing the KEYGEN tag as part of the certificate enrollment process.

The challenge string permits a primitive form of proof of possession of private key. By checking the SPKAC signature and a random challenge string some guarantee is given that the user knows the private key corresponding to the public key being certified. This is important in some applications. Without this it is possible for a previous SPKAC to be used in a ``replay attack''.  

SEE ALSO

ca(1)


 

Index

NAME
SYNOPSIS
DESCRIPTION
COMMAND OPTIONS
EXAMPLES
NOTES
SEE ALSO





Support us on Content Nation
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2020 Sascha Nitsch Unternehmensberatung GmbH
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 17.4 ms