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135 .\" ========================================================================
138 .TH PKCS12 1 "2014-04-07" "1.0.1n" "OpenSSL"
139 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
140 .\" way too many mistakes in technical documents.
144 pkcs12 \- PKCS#12 file utility
148 .IX Header "SYNOPSIS"
149 \&\fBopenssl\fR \fBpkcs12\fR
152 [\fB\-inkey filename\fR]
153 [\fB\-certfile filename\fR]
155 [\fB\-caname name\fR]
156 [\fB\-in filename\fR]
157 [\fB\-out filename\fR]
165 [\fB\-des | \-des3 | \-idea | \-aes128 | \-aes192 | \-aes256 | \-camellia128 | \-camellia192 | \-camellia256 | \-nodes\fR]
167 [\fB\-maciter | \-nomaciter | \-nomac\fR]
170 [\fB\-certpbe cipher\fR]
171 [\fB\-keypbe cipher\fR]
172 [\fB\-macalg digest\fR]
175 [\fB\-password arg\fR]
177 [\fB\-passout arg\fR]
178 [\fB\-rand file(s)\fR]
179 [\fB\-CAfile file\fR]
183 .IX Header "DESCRIPTION"
184 The \fBpkcs12\fR command allows PKCS#12 files (sometimes referred to as
185 \&\s-1PFX\s0 files) to be created and parsed. PKCS#12 files are used by several
186 programs including Netscape, \s-1MSIE\s0 and \s-1MS\s0 Outlook.
187 .SH "COMMAND OPTIONS"
188 .IX Header "COMMAND OPTIONS"
189 There are a lot of options the meaning of some depends of whether a PKCS#12 file
190 is being created or parsed. By default a PKCS#12 file is parsed. A PKCS#12
191 file can be created by using the \fB\-export\fR option (see below).
192 .SH "PARSING OPTIONS"
193 .IX Header "PARSING OPTIONS"
194 .IP "\fB\-in filename\fR" 4
195 .IX Item "-in filename"
196 This specifies filename of the PKCS#12 file to be parsed. Standard input is used
198 .IP "\fB\-out filename\fR" 4
199 .IX Item "-out filename"
200 The filename to write certificates and private keys to, standard output by
201 default. They are all written in \s-1PEM\s0 format.
202 .IP "\fB\-passin arg\fR" 4
203 .IX Item "-passin arg"
204 the PKCS#12 file (i.e. input file) password source. For more information about
205 the format of \fBarg\fR see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in
206 \&\fIopenssl\fR\|(1).
207 .IP "\fB\-passout arg\fR" 4
208 .IX Item "-passout arg"
209 pass phrase source to encrypt any outputted private keys with. For more
210 information about the format of \fBarg\fR see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section
211 in \fIopenssl\fR\|(1).
212 .IP "\fB\-password arg\fR" 4
213 .IX Item "-password arg"
214 With \-export, \-password is equivalent to \-passout.
215 Otherwise, \-password is equivalent to \-passin.
216 .IP "\fB\-noout\fR" 4
218 this option inhibits output of the keys and certificates to the output file
219 version of the PKCS#12 file.
220 .IP "\fB\-clcerts\fR" 4
222 only output client certificates (not \s-1CA\s0 certificates).
223 .IP "\fB\-cacerts\fR" 4
225 only output \s-1CA\s0 certificates (not client certificates).
226 .IP "\fB\-nocerts\fR" 4
228 no certificates at all will be output.
229 .IP "\fB\-nokeys\fR" 4
231 no private keys will be output.
234 output additional information about the PKCS#12 file structure, algorithms used and
238 use \s-1DES\s0 to encrypt private keys before outputting.
241 use triple \s-1DES\s0 to encrypt private keys before outputting, this is the default.
244 use \s-1IDEA\s0 to encrypt private keys before outputting.
245 .IP "\fB\-aes128\fR, \fB\-aes192\fR, \fB\-aes256\fR" 4
246 .IX Item "-aes128, -aes192, -aes256"
247 use \s-1AES\s0 to encrypt private keys before outputting.
248 .IP "\fB\-camellia128\fR, \fB\-camellia192\fR, \fB\-camellia256\fR" 4
249 .IX Item "-camellia128, -camellia192, -camellia256"
250 use Camellia to encrypt private keys before outputting.
251 .IP "\fB\-nodes\fR" 4
253 don't encrypt the private keys at all.
254 .IP "\fB\-nomacver\fR" 4
256 don't attempt to verify the integrity \s-1MAC\s0 before reading the file.
257 .IP "\fB\-twopass\fR" 4
259 prompt for separate integrity and encryption passwords: most software
260 always assumes these are the same so this option will render such
261 PKCS#12 files unreadable.
262 .SH "FILE CREATION OPTIONS"
263 .IX Header "FILE CREATION OPTIONS"
264 .IP "\fB\-export\fR" 4
266 This option specifies that a PKCS#12 file will be created rather than
268 .IP "\fB\-out filename\fR" 4
269 .IX Item "-out filename"
270 This specifies filename to write the PKCS#12 file to. Standard output is used
272 .IP "\fB\-in filename\fR" 4
273 .IX Item "-in filename"
274 The filename to read certificates and private keys from, standard input by
275 default. They must all be in \s-1PEM\s0 format. The order doesn't matter but one
276 private key and its corresponding certificate should be present. If additional
277 certificates are present they will also be included in the PKCS#12 file.
278 .IP "\fB\-inkey filename\fR" 4
279 .IX Item "-inkey filename"
280 file to read private key from. If not present then a private key must be present
282 .IP "\fB\-name friendlyname\fR" 4
283 .IX Item "-name friendlyname"
284 This specifies the \*(L"friendly name\*(R" for the certificate and private key. This
285 name is typically displayed in list boxes by software importing the file.
286 .IP "\fB\-certfile filename\fR" 4
287 .IX Item "-certfile filename"
288 A filename to read additional certificates from.
289 .IP "\fB\-caname friendlyname\fR" 4
290 .IX Item "-caname friendlyname"
291 This specifies the \*(L"friendly name\*(R" for other certificates. This option may be
292 used multiple times to specify names for all certificates in the order they
293 appear. Netscape ignores friendly names on other certificates whereas \s-1MSIE\s0
295 .IP "\fB\-pass arg\fR, \fB\-passout arg\fR" 4
296 .IX Item "-pass arg, -passout arg"
297 the PKCS#12 file (i.e. output file) password source. For more information about
298 the format of \fBarg\fR see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in
299 \&\fIopenssl\fR\|(1).
300 .IP "\fB\-passin password\fR" 4
301 .IX Item "-passin password"
302 pass phrase source to decrypt any input private keys with. For more information
303 about the format of \fBarg\fR see the \fB\s-1PASS PHRASE ARGUMENTS\s0\fR section in
304 \&\fIopenssl\fR\|(1).
305 .IP "\fB\-chain\fR" 4
307 if this option is present then an attempt is made to include the entire
308 certificate chain of the user certificate. The standard \s-1CA\s0 store is used
309 for this search. If the search fails it is considered a fatal error.
310 .IP "\fB\-descert\fR" 4
312 encrypt the certificate using triple \s-1DES,\s0 this may render the PKCS#12
313 file unreadable by some \*(L"export grade\*(R" software. By default the private
314 key is encrypted using triple \s-1DES\s0 and the certificate using 40 bit \s-1RC2.\s0
315 .IP "\fB\-keypbe alg\fR, \fB\-certpbe alg\fR" 4
316 .IX Item "-keypbe alg, -certpbe alg"
317 these options allow the algorithm used to encrypt the private key and
318 certificates to be selected. Any PKCS#5 v1.5 or PKCS#12 \s-1PBE\s0 algorithm name
319 can be used (see \fB\s-1NOTES\s0\fR section for more information). If a a cipher name
320 (as output by the \fBlist-cipher-algorithms\fR command is specified then it
321 is used with PKCS#5 v2.0. For interoperability reasons it is advisable to only
322 use PKCS#12 algorithms.
323 .IP "\fB\-keyex|\-keysig\fR" 4
324 .IX Item "-keyex|-keysig"
325 specifies that the private key is to be used for key exchange or just signing.
326 This option is only interpreted by \s-1MSIE\s0 and similar \s-1MS\s0 software. Normally
327 \&\*(L"export grade\*(R" software will only allow 512 bit \s-1RSA\s0 keys to be used for
328 encryption purposes but arbitrary length keys for signing. The \fB\-keysig\fR
329 option marks the key for signing only. Signing only keys can be used for
330 S/MIME signing, authenticode (ActiveX control signing) and \s-1SSL\s0 client
331 authentication, however due to a bug only \s-1MSIE 5.0\s0 and later support
332 the use of signing only keys for \s-1SSL\s0 client authentication.
333 .IP "\fB\-macalg digest\fR" 4
334 .IX Item "-macalg digest"
335 specify the \s-1MAC\s0 digest algorithm. If not included them \s-1SHA1\s0 will be used.
336 .IP "\fB\-nomaciter\fR, \fB\-noiter\fR" 4
337 .IX Item "-nomaciter, -noiter"
338 these options affect the iteration counts on the \s-1MAC\s0 and key algorithms.
339 Unless you wish to produce files compatible with \s-1MSIE 4.0\s0 you should leave
342 To discourage attacks by using large dictionaries of common passwords the
343 algorithm that derives keys from passwords can have an iteration count applied
344 to it: this causes a certain part of the algorithm to be repeated and slows it
345 down. The \s-1MAC\s0 is used to check the file integrity but since it will normally
346 have the same password as the keys and certificates it could also be attacked.
347 By default both \s-1MAC\s0 and encryption iteration counts are set to 2048, using
348 these options the \s-1MAC\s0 and encryption iteration counts can be set to 1, since
349 this reduces the file security you should not use these options unless you
350 really have to. Most software supports both \s-1MAC\s0 and key iteration counts.
351 \&\s-1MSIE 4.0\s0 doesn't support \s-1MAC\s0 iteration counts so it needs the \fB\-nomaciter\fR
353 .IP "\fB\-maciter\fR" 4
355 This option is included for compatibility with previous versions, it used
356 to be needed to use \s-1MAC\s0 iterations counts but they are now used by default.
357 .IP "\fB\-nomac\fR" 4
359 don't attempt to provide the \s-1MAC\s0 integrity.
360 .IP "\fB\-rand file(s)\fR" 4
361 .IX Item "-rand file(s)"
362 a file or files containing random data used to seed the random number
363 generator, or an \s-1EGD\s0 socket (see \fIRAND_egd\fR\|(3)).
364 Multiple files can be specified separated by a OS-dependent character.
365 The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
367 .IP "\fB\-CAfile file\fR" 4
368 .IX Item "-CAfile file"
369 \&\s-1CA\s0 storage as a file.
370 .IP "\fB\-CApath dir\fR" 4
371 .IX Item "-CApath dir"
372 \&\s-1CA\s0 storage as a directory. This directory must be a standard certificate
373 directory: that is a hash of each subject name (using \fBx509 \-hash\fR) should be
374 linked to each certificate.
375 .IP "\fB\-CSP name\fR" 4
377 write \fBname\fR as a Microsoft \s-1CSP\s0 name.
380 Although there are a large number of options most of them are very rarely
381 used. For PKCS#12 file parsing only \fB\-in\fR and \fB\-out\fR need to be used
382 for PKCS#12 file creation \fB\-export\fR and \fB\-name\fR are also used.
384 If none of the \fB\-clcerts\fR, \fB\-cacerts\fR or \fB\-nocerts\fR options are present
385 then all certificates will be output in the order they appear in the input
386 PKCS#12 files. There is no guarantee that the first certificate present is
387 the one corresponding to the private key. Certain software which requires
388 a private key and certificate and assumes the first certificate in the
389 file is the one corresponding to the private key: this may not always
390 be the case. Using the \fB\-clcerts\fR option will solve this problem by only
391 outputting the certificate corresponding to the private key. If the \s-1CA\s0
392 certificates are required then they can be output to a separate file using
393 the \fB\-nokeys \-cacerts\fR options to just output \s-1CA\s0 certificates.
395 The \fB\-keypbe\fR and \fB\-certpbe\fR algorithms allow the precise encryption
396 algorithms for private keys and certificates to be specified. Normally
397 the defaults are fine but occasionally software can't handle triple \s-1DES\s0
398 encrypted private keys, then the option \fB\-keypbe \s-1PBE\-SHA1\-RC2\-40\s0\fR can
399 be used to reduce the private key encryption to 40 bit \s-1RC2. A\s0 complete
400 description of all algorithms is contained in the \fBpkcs8\fR manual page.
402 .IX Header "EXAMPLES"
403 Parse a PKCS#12 file and output it to a file:
406 \& openssl pkcs12 \-in file.p12 \-out file.pem
409 Output only client certificates to a file:
412 \& openssl pkcs12 \-in file.p12 \-clcerts \-out file.pem
415 Don't encrypt the private key:
418 \& openssl pkcs12 \-in file.p12 \-out file.pem \-nodes
421 Print some info about a PKCS#12 file:
424 \& openssl pkcs12 \-in file.p12 \-info \-noout
427 Create a PKCS#12 file:
430 \& openssl pkcs12 \-export \-in file.pem \-out file.p12 \-name "My Certificate"
433 Include some extra certificates:
436 \& openssl pkcs12 \-export \-in file.pem \-out file.p12 \-name "My Certificate" \e
437 \& \-certfile othercerts.pem
441 Some would argue that the PKCS#12 standard is one big bug :\-)
443 Versions of OpenSSL before 0.9.6a had a bug in the PKCS#12 key generation
444 routines. Under rare circumstances this could produce a PKCS#12 file encrypted
445 with an invalid key. As a result some PKCS#12 files which triggered this bug
446 from other implementations (\s-1MSIE\s0 or Netscape) could not be decrypted
447 by OpenSSL and similarly OpenSSL could produce PKCS#12 files which could
448 not be decrypted by other implementations. The chances of producing such
449 a file are relatively small: less than 1 in 256.
451 A side effect of fixing this bug is that any old invalidly encrypted PKCS#12
452 files cannot no longer be parsed by the fixed version. Under such circumstances
453 the \fBpkcs12\fR utility will report that the \s-1MAC\s0 is \s-1OK\s0 but fail with a decryption
454 error when extracting private keys.
456 This problem can be resolved by extracting the private keys and certificates
457 from the PKCS#12 file using an older version of OpenSSL and recreating the PKCS#12
458 file from the keys and certificates using a newer version of OpenSSL. For example:
461 \& old\-openssl \-in bad.p12 \-out keycerts.pem
462 \& openssl \-in keycerts.pem \-export \-name "My PKCS#12 file" \-out fixed.p12
465 .IX Header "SEE ALSO"
466 \&\fIopenssl_pkcs8\fR\|(1)