SPKAC 1 2003-07-24 0.9.9-dev OpenSSL
NAME
spkac - SPKAC printing and generating utility
LIBRARY
libcrypto, -lcrypto
SYNOPSIS
ooppeennssssll ssppkkaacc
[--iinn ffiilleennaammee]
[--oouutt ffiilleennaammee]
[--kkeeyy kkeeyyffiillee]
[--ppaassssiinn aarrgg]
[--cchhaalllleennggee ssttrriinngg]
[--ppuubbkkeeyy]
[--ssppkkaacc ssppkkaaccnnaammee]
[--ssppkksseecctt sseeccttiioonn]
[--nnoooouutt]
[--vveerriiffyy]
[--eennggiinnee iidd]
DESCRIPTION
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.
COMMAND OPTIONS
-
--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
-
default.
-
--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 format of aarrgg
-
see the PPAASSSS PPHHRRAASSEE AARRGGUUMMEENNTTSS section in _o_p_e_n_s_s_l(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.
-
--nnoooouutt
don't output the text version of the SPKAC (not used if an
-
SPKAC is being created).
-
--ppuubbkkeeyy
output the public key of an SPKAC (not used if an SPKAC is
-
being created).
-
--vveerriiffyy
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.
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 ccaa utility.
SPKACs are typically generated by Netscape when a form is submitted
containing the KKEEYYGGEENN 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
_o_p_e_n_s_s_l___c_a(1)