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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/apps/pkcs12.pod | |
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Diffstat (limited to 'openssl/doc/apps/pkcs12.pod')
-rw-r--r-- | openssl/doc/apps/pkcs12.pod | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/openssl/doc/apps/pkcs12.pod b/openssl/doc/apps/pkcs12.pod new file mode 100644 index 000000000..7d8414629 --- /dev/null +++ b/openssl/doc/apps/pkcs12.pod @@ -0,0 +1,330 @@ + +=pod + +=head1 NAME + +pkcs12 - PKCS#12 file utility + +=head1 SYNOPSIS + +B<openssl> B<pkcs12> +[B<-export>] +[B<-chain>] +[B<-inkey filename>] +[B<-certfile filename>] +[B<-name name>] +[B<-caname name>] +[B<-in filename>] +[B<-out filename>] +[B<-noout>] +[B<-nomacver>] +[B<-nocerts>] +[B<-clcerts>] +[B<-cacerts>] +[B<-nokeys>] +[B<-info>] +[B<-des>] +[B<-des3>] +[B<-idea>] +[B<-nodes>] +[B<-noiter>] +[B<-maciter>] +[B<-twopass>] +[B<-descert>] +[B<-certpbe>] +[B<-keypbe>] +[B<-keyex>] +[B<-keysig>] +[B<-password arg>] +[B<-passin arg>] +[B<-passout arg>] +[B<-rand file(s)>] + +=head1 DESCRIPTION + +The B<pkcs12> 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. + +=head1 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 B<-export> option (see below). + +=head1 PARSING OPTIONS + +=over 4 + +=item B<-in filename> + +This specifies filename of the PKCS#12 file to be parsed. Standard input is used +by default. + +=item B<-out filename> + +The filename to write certificates and private keys to, standard output by default. +They are all written in PEM format. + +=item B<-pass arg>, B<-passin arg> + +the PKCS#12 file (i.e. input file) password source. For more information about the +format of B<arg> see the B<PASS PHRASE ARGUMENTS> section in +L<openssl(1)|openssl(1)>. + +=item B<-passout arg> + +pass phrase source to encrypt any outputed private keys with. For more information +about the format of B<arg> see the B<PASS PHRASE ARGUMENTS> section in +L<openssl(1)|openssl(1)>. + +=item B<-noout> + +this option inhibits output of the keys and certificates to the output file version +of the PKCS#12 file. + +=item B<-clcerts> + +only output client certificates (not CA certificates). + +=item B<-cacerts> + +only output CA certificates (not client certificates). + +=item B<-nocerts> + +no certificates at all will be output. + +=item B<-nokeys> + +no private keys will be output. + +=item B<-info> + +output additional information about the PKCS#12 file structure, algorithms used and +iteration counts. + +=item B<-des> + +use DES to encrypt private keys before outputting. + +=item B<-des3> + +use triple DES to encrypt private keys before outputting, this is the default. + +=item B<-idea> + +use IDEA to encrypt private keys before outputting. + +=item B<-nodes> + +don't encrypt the private keys at all. + +=item B<-nomacver> + +don't attempt to verify the integrity MAC before reading the file. + +=item B<-twopass> + +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. + +=back + +=head1 FILE CREATION OPTIONS + +=over 4 + +=item B<-export> + +This option specifies that a PKCS#12 file will be created rather than +parsed. + +=item B<-out filename> + +This specifies filename to write the PKCS#12 file to. Standard output is used +by default. + +=item B<-in filename> + +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. + +=item B<-inkey filename> + +file to read private key from. If not present then a private key must be present +in the input file. + +=item B<-name friendlyname> + +This specifies the "friendly name" for the certificate and private key. This name +is typically displayed in list boxes by software importing the file. + +=item B<-certfile filename> + +A filename to read additional certificates from. + +=item B<-caname friendlyname> + +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. + +=item B<-pass arg>, B<-passout arg> + +the PKCS#12 file (i.e. output file) password source. For more information about +the format of B<arg> see the B<PASS PHRASE ARGUMENTS> section in +L<openssl(1)|openssl(1)>. + +=item B<-passin password> + +pass phrase source to decrypt any input private keys with. For more information +about the format of B<arg> see the B<PASS PHRASE ARGUMENTS> section in +L<openssl(1)|openssl(1)>. + +=item B<-chain> + +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. + +=item B<-descert> + +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. + +=item B<-keypbe alg>, B<-certpbe alg> + +these options allow the algorithm used to encrypt the private key and +certificates to be selected. Although any PKCS#5 v1.5 or PKCS#12 algorithms +can be selected it is advisable only to use PKCS#12 algorithms. See the list +in the B<NOTES> section for more information. + +=item B<-keyex|-keysig> + +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 B<-keysig> +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. + +=item B<-nomaciter>, B<-noiter> + +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 B<-nomaciter> +option. + +=item B<-maciter> + +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. + +=item B<-rand file(s)> + +a file or files containing random data used to seed the random number +generator, or an EGD socket (see L<RAND_egd(3)|RAND_egd(3)>). +Multiple files can be specified separated by a OS-dependent character. +The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for +all others. + +=back + +=head1 NOTES + +Although there are a large number of options most of them are very rarely +used. For PKCS#12 file parsing only B<-in> and B<-out> need to be used +for PKCS#12 file creation B<-export> and B<-name> are also used. + +If none of the B<-clcerts>, B<-cacerts> or B<-nocerts> 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 B<-clcerts> 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 B<-nokeys -cacerts> options to just output CA certificates. + +The B<-keypbe> and B<-certpbe> 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 B<-keypbe PBE-SHA1-RC2-40> can +be used to reduce the private key encryption to 40 bit RC2. A complete +description of all algorithms is contained in the B<pkcs8> manual page. + +=head1 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 + +=head1 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 B<pkcs12> 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 + +=head1 SEE ALSO + +L<pkcs8(1)|pkcs8(1)> + |