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SPKAC(1)                            OpenSSL                           SPKAC(1)

       spkac - SPKAC printing and generating utility

       ooppeennssssll ssppkkaacc [--iinn ffiilleennaammee] [--oouutt ffiilleennaammee] [--kkeeyy kkeeyyffiillee] [--ppaassssiinn
       aarrgg] [--cchhaalllleennggee ssttrriinngg] [--ppuubbkkeeyy] [--ssppkkaacc ssppkkaaccnnaammee] [--ssppkksseecctt sseecc--
       ttiioonn] [--nnoooouutt] [--vveerriiffyy] [--eennggiinnee iidd]

       The ssppkkaacc 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.

       --iinn ffiilleennaammee
           This specifies the input filename to read from or standard input if
           this option is not specified. Ignored if the --kkeeyy option is used.

       --oouutt ffiilleennaammee
           specifies the output filename to write to or standard output by

       --kkeeyy kkeeyyffiillee
           create an SPKAC file using the private key in kkeeyyffiillee. The --iinn,
           --nnoooouutt, --ssppkksseecctt and --vveerriiffyy options are ignored if present.

       --ppaassssiinn ppaasssswwoorrdd
           the input file password source. For more information about the for-
           mat of aarrgg see the PPAASSSS PPHHRRAASSEE AARRGGUUMMEENNTTSS section in openssl(1).

       --cchhaalllleennggee ssttrriinngg
           specifies the challenge string if an SPKAC is being created.

       --ssppkkaacc ssppkkaaccnnaammee
           allows an alternative name form the variable containing the SPKAC.
           The default is "SPKAC". This option affects both generated and
           input SPKAC files.

       --ssppkksseecctt sseeccttiioonn
           allows an alternative name form the section containing the SPKAC.
           The default is the default section.

           don't output the text version of the SPKAC (not used if an SPKAC is
           being created).

           output the public key of an SPKAC (not used if an SPKAC is being

           verifies the digital signature on the supplied SPKAC.

       --eennggiinnee iidd
           specifying an engine (by it's unique iidd string) will cause rreeqq 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.

       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):


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

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

       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 cor-
       responding 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".


3rd Berkeley Distribution           0.9.7a                            SPKAC(1)

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