NetBSD 6.1.5 - man page for openssl_spkac (netbsd section 1)
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SPKAC(1) OpenSSL SPKAC(1)
spkac - SPKAC printing and generating utility
openssl spkac [-in filename] [-out filename] [-key keyfile] [-passin arg] [-challenge
string] [-pubkey] [-spkac spkacname] [-spksect section] [-noout] [-verify] [-engine id]
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
This specifies the input filename to read from or standard input if this option is not
specified. Ignored if the -key option is used.
specifies the output filename to write to or standard output by default.
create an SPKAC file using the private key in keyfile. The -in, -noout, -spksect and
-verify options are ignored if present.
the input file password source. For more information about the format of arg see the
PASS PHRASE ARGUMENTS section in openssl(1).
specifies the challenge string if an SPKAC is being created.
allows an alternative name form the variable containing the SPKAC. The default is
"SPKAC". This option affects both generated and input SPKAC files.
allows an alternative name form the section containing the SPKAC. The default is the
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 created).
verifies the digital signature on the supplied SPKAC.
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.
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 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".
1.0.1i 2009-07-20 SPKAC(1)
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