PKCS12 1 2008-05-09 0.9.9-dev OpenSSL
NAME
pkcs12 - PKCS#12 file utility
LIBRARY
libcrypto, -lcrypto
SYNOPSIS
ooppeennssssll ppkkccss1122
[--eexxppoorrtt]
[--cchhaaiinn]
[--iinnkkeeyy ffiilleennaammee]
[--cceerrttffiillee ffiilleennaammee]
[--nnaammee nnaammee]
[--ccaannaammee nnaammee]
[--iinn ffiilleennaammee]
[--oouutt ffiilleennaammee]
[--nnoooouutt]
[--nnoommaaccvveerr]
[--nnoocceerrttss]
[--ccllcceerrttss]
[--ccaacceerrttss]
[--nnookkeeyyss]
[--iinnffoo]
[--ddeess || --ddeess33 || --iiddeeaa || --aaeess112288 || --aaeess119922 || --aaeess225566 || --ccaammeelllliiaa112288 || --ccaammeelllliiaa119922 || --ccaammeelllliiaa225566 || --nnooddeess]
[--nnooiitteerr]
[--mmaacciitteerr || --nnoommaacciitteerr || --nnoommaacc]
[--ttwwooppaassss]
[--ddeesscceerrtt]
[--cceerrttppbbee cciipphheerr]
[--kkeeyyppbbee cciipphheerr]
[--mmaaccaallgg ddiiggeesstt]
[--kkeeyyeexx]
[--kkeeyyssiigg]
[--ppaasssswwoorrdd aarrgg]
[--ppaassssiinn aarrgg]
[--ppaassssoouutt aarrgg]
[--rraanndd ffiillee((ss))]
[--CCAAffiillee ffiillee]
[--CCAAppaatthh ddiirr]
[--CCSSPP nnaammee]
DESCRIPTION
The ppkkccss1122 command allows PKCS#12 files (sometimes referred to as
PFX files) to be created and parsed. PKCS#12 files are used by several
programs including Netscape, MSIE and MS Outlook.
COMMAND OPTIONS
There are a lot of options the meaning of some depends of whether a PKCS#12 file
is being created or parsed. By default a PKCS#12 file is parsed. A PKCS#12
file can be created by using the --eexxppoorrtt option (see below).
PARSING OPTIONS
-
--iinn ffiilleennaammee
This specifies filename of the PKCS#12 file to be parsed. Standard input is used
-
by default.
-
--oouutt ffiilleennaammee
The filename to write certificates and private keys to, standard output by
-
default. They are all written in PEM format.
-
--ppaassss aarrgg, --ppaassssiinn aarrgg
the PKCS#12 file (i.e. 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).
-
--ppaassssoouutt aarrgg
pass phrase source to encrypt any outputed private keys with. For more
-
information about the format of aarrgg see the PPAASSSS PPHHRRAASSEE AARRGGUUMMEENNTTSS section
in _o_p_e_n_s_s_l(1).
-
--nnoooouutt
this option inhibits output of the keys and certificates to the output file
-
version of the PKCS#12 file.
-
--ccllcceerrttss
only output client certificates (not CA certificates).
-
-
--ccaacceerrttss
only output CA certificates (not client certificates).
-
-
--nnoocceerrttss
no certificates at all will be output.
-
-
--nnookkeeyyss
no private keys will be output.
-
-
--iinnffoo
output additional information about the PKCS#12 file structure, algorithms used and
-
iteration counts.
-
--ddeess
use DES to encrypt private keys before outputting.
-
-
--ddeess33
use triple DES to encrypt private keys before outputting, this is the default.
-
-
--iiddeeaa
use IDEA to encrypt private keys before outputting.
-
-
--aaeess112288, --aaeess119922, --aaeess225566
use AES to encrypt private keys before outputting.
-
-
--ccaammeelllliiaa112288, --ccaammeelllliiaa119922, --ccaammeelllliiaa225566
use Camellia to encrypt private keys before outputting.
-
-
--nnooddeess
don't encrypt the private keys at all.
-
-
--nnoommaaccvveerr
don't attempt to verify the integrity MAC before reading the file.
-
-
--ttwwooppaassss
prompt for separate integrity and encryption passwords: most software
-
always assumes these are the same so this option will render such
PKCS#12 files unreadable.
FILE CREATION OPTIONS
-
--eexxppoorrtt
This option specifies that a PKCS#12 file will be created rather than
-
parsed.
-
--oouutt ffiilleennaammee
This specifies filename to write the PKCS#12 file to. Standard output is used
-
by default.
-
--iinn ffiilleennaammee
The filename to read certificates and private keys from, standard input by
-
default. They must all be in PEM format. The order doesn't matter but one
private key and its corresponding certificate should be present. If additional
certificates are present they will also be included in the PKCS#12 file.
-
--iinnkkeeyy ffiilleennaammee
file to read private key from. If not present then a private key must be present
-
in the input file.
-
--nnaammee ffrriieennddllyynnaammee
This specifies the "friendly name" for the certificate and private key. This
-
name is typically displayed in list boxes by software importing the file.
-
--cceerrttffiillee ffiilleennaammee
A filename to read additional certificates from.
-
-
--ccaannaammee ffrriieennddllyynnaammee
This specifies the "friendly name" for other certificates. This option may be
-
used multiple times to specify names for all certificates in the order they
appear. Netscape ignores friendly names on other certificates whereas MSIE
displays them.
-
--ppaassss aarrgg, --ppaassssoouutt aarrgg
the PKCS#12 file (i.e. output 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).
-
--ppaassssiinn ppaasssswwoorrdd
pass phrase source to decrypt any input private keys with. For more information
-
about the format of aarrgg see the PPAASSSS PPHHRRAASSEE AARRGGUUMMEENNTTSS section in
_o_p_e_n_s_s_l(1).
-
--cchhaaiinn
if this option is present then an attempt is made to include the entire
-
certificate chain of the user certificate. The standard CA store is used
for this search. If the search fails it is considered a fatal error.
-
--ddeesscceerrtt
encrypt the certificate using triple DES, this may render the PKCS#12
-
file unreadable by some "export grade" software. By default the private
key is encrypted using triple DES and the certificate using 40 bit RC2.
-
--kkeeyyppbbee aallgg, --cceerrttppbbee aallgg
these options allow the algorithm used to encrypt the private key and
-
certificates to be selected. Any PKCS#5 v1.5 or PKCS#12 PBE algorithm name
can be used (see NNOOTTEESS section for more information). If a a cipher name
(as output by the lliisstt--cciipphheerr--aallggoorriitthhmmss command is specified then it
is used with PKCS#5 v2.0. For interoperability reasons it is advisable to only
use PKCS#12 algorithms.
-
--kkeeyyeexx||--kkeeyyssiigg
specifies that the private key is to be used for key exchange or just signing.
-
This option is only interpreted by MSIE and similar MS software. Normally
"export grade" software will only allow 512 bit RSA keys to be used for
encryption purposes but arbitrary length keys for signing. The --kkeeyyssiigg
option marks the key for signing only. Signing only keys can be used for
S/MIME signing, authenticode (ActiveX control signing) and SSL client
authentication, however due to a bug only MSIE 5.0 and later support
the use of signing only keys for SSL client authentication.
-
--mmaaccaallgg ddiiggeesstt
specify the MAC digest algorithm. If not included them SHA1 will be used.
-
-
--nnoommaacciitteerr, --nnooiitteerr
these options affect the iteration counts on the MAC and key algorithms.
-
Unless you wish to produce files compatible with MSIE 4.0 you should leave
these options alone.
To discourage attacks by using large dictionaries of common passwords the
algorithm that derives keys from passwords can have an iteration count applied
to it: this causes a certain part of the algorithm to be repeated and slows it
down. The MAC is used to check the file integrity but since it will normally
have the same password as the keys and certificates it could also be attacked.
By default both MAC and encryption iteration counts are set to 2048, using
these options the MAC and encryption iteration counts can be set to 1, since
this reduces the file security you should not use these options unless you
really have to. Most software supports both MAC and key iteration counts.
MSIE 4.0 doesn't support MAC iteration counts so it needs the --nnoommaacciitteerr
option.
-
--mmaacciitteerr
This option is included for compatibility with previous versions, it used
-
to be needed to use MAC iterations counts but they are now used by default.
-
--nnoommaacc
don't attempt to provide the MAC integrity.
-
-
--rraanndd ffiillee((ss))
a file or files containing random data used to seed the random number
-
generator, or an EGD socket (see _R_A_N_D___e_g_d(3)).
Multiple files can be specified separated by a OS-dependent character.
The separator is ;; for MS-Windows, ,, for OpenVMS, and :: for
all others.
-
--CCAAffiillee ffiillee
CA storage as a file.
-
-
--CCAAppaatthh ddiirr
CA storage as a directory. This directory must be a standard certificate
-
directory: that is a hash of each subject name (using xx550099 --hhaasshh) should be
linked to each certificate.
-
--CCSSPP nnaammee
write nnaammee as a Microsoft CSP name.
-
NOTES
Although there are a large number of options most of them are very rarely
used. For PKCS#12 file parsing only --iinn and --oouutt need to be used
for PKCS#12 file creation --eexxppoorrtt and --nnaammee are also used.
If none of the --ccllcceerrttss, --ccaacceerrttss or --nnoocceerrttss options are present
then all certificates will be output in the order they appear in the input
PKCS#12 files. There is no guarantee that the first certificate present is
the one corresponding to the private key. Certain software which requires
a private key and certificate and assumes the first certificate in the
file is the one corresponding to the private key: this may not always
be the case. Using the --ccllcceerrttss option will solve this problem by only
outputting the certificate corresponding to the private key. If the CA
certificates are required then they can be output to a separate file using
the --nnookkeeyyss --ccaacceerrttss options to just output CA certificates.
The --kkeeyyppbbee and --cceerrttppbbee algorithms allow the precise encryption
algorithms for private keys and certificates to be specified. Normally
the defaults are fine but occasionally software can't handle triple DES
encrypted private keys, then the option --kkeeyyppbbee PPBBEE--SSHHAA11--RRCC22--4400 can
be used to reduce the private key encryption to 40 bit RC2. A complete
description of all algorithms is contained in the ppkkccss88 manual page.
EXAMPLES
Parse a PKCS#12 file and output it to a file:
openssl pkcs12 -in file.p12 -out file.pem
Output only client certificates to a file:
openssl pkcs12 -in file.p12 -clcerts -out file.pem
Don't encrypt the private key:
openssl pkcs12 -in file.p12 -out file.pem -nodes
Print some info about a PKCS#12 file:
openssl pkcs12 -in file.p12 -info -noout
Create a PKCS#12 file:
openssl pkcs12 -export -in file.pem -out file.p12 -name "My Certificate"
Include some extra certificates:
openssl pkcs12 -export -in file.pem -out file.p12 -name "My Certificate" \
-certfile othercerts.pem
BUGS
Some would argue that the PKCS#12 standard is one big bug :-)
Versions of OpenSSL before 0.9.6a had a bug in the PKCS#12 key generation
routines. Under rare circumstances this could produce a PKCS#12 file encrypted
with an invalid key. As a result some PKCS#12 files which triggered this bug
from other implementations (MSIE or Netscape) could not be decrypted
by OpenSSL and similarly OpenSSL could produce PKCS#12 files which could
not be decrypted by other implementations. The chances of producing such
a file are relatively small: less than 1 in 256.
A side effect of fixing this bug is that any old invalidly encrypted PKCS#12
files cannot no longer be parsed by the fixed version. Under such circumstances
the ppkkccss1122 utility will report that the MAC is OK but fail with a decryption
error when extracting private keys.
This problem can be resolved by extracting the private keys and certificates
from the PKCS#12 file using an older version of OpenSSL and recreating the PKCS#12
file from the keys and certificates using a newer version of OpenSSL. For example:
old-openssl -in bad.p12 -out keycerts.pem
openssl -in keycerts.pem -export -name "My PKCS#12 file" -out fixed.p12
SEE ALSO
_o_p_e_n_s_s_l___p_k_c_s_8(1)