=pod

=encoding utf8 

=head1 NAME

=encoding utf8

ca - sample minimal CA application

=head1 SYNOPSIS

B<gmssl> B<ca>
[B<-help>]
[B<-verbose>]
[B<-config filename>]
[B<-name section>]
[B<-gencrl>]
[B<-revoke file>]
[B<-valid file>]
[B<-status serial>]
[B<-updatedb>]
[B<-crl_reason reason>]
[B<-crl_hold instruction>]
[B<-crl_compromise time>]
[B<-crl_CA_compromise time>]
[B<-crldays days>]
[B<-crlhours hours>]
[B<-crlexts section>]
[B<-startdate date>]
[B<-enddate date>]
[B<-days arg>]
[B<-md arg>]
[B<-policy arg>]
[B<-keyfile arg>]
[B<-keyform PEM|DER>]
[B<-key arg>]
[B<-passin arg>]
[B<-cert file>]
[B<-selfsign>]
[B<-in file>]
[B<-out file>]
[B<-notext>]
[B<-outdir dir>]
[B<-infiles>]
[B<-spkac file>]
[B<-ss_cert file>]
[B<-preserveDN>]
[B<-noemailDN>]
[B<-batch>]
[B<-msie_hack>]
[B<-extensions section>]
[B<-extfile section>]
[B<-engine id>]
[B<-subj arg>]
[B<-utf8>]
[B<-create_serial>]
[B<-multivalue-rdn>]

=head1 DESCRIPTION

The B<ca> command is a minimal CA application. It can be used
to sign certificate requests in a variety of forms and generate
CRLs it also maintains a text database of issued certificates
and their status.

The options descriptions will be divided into each purpose.

ca指令是CA中很小的应用。它可以用来签发各种形式的用户证书并产生CRL。它还可以用来更新证书库。
在这些选项的介绍中，将尽可能地对它们进行分类介绍。

=head1 OPTIONS

=over 4

=item B<-help>

Print out a usage message.

显示用法信息。

=item B<-verbose>

this prints extra details about the operations being performed.

输出更详细的一些操作过程信息。

=item B<-config filename>

specifies the configuration file to use.

指定将要使用的配置文件。

=item B<-name section>

specifies the configuration file section to use (overrides
B<default_ca> in the B<ca> section).

指定将要使用的配置文件部分（覆盖ca部分中的default_ca部分）

=item B<-in filename>

an input filename containing a single certificate request to be
signed by the CA.

一个输入文件名包含了一个要由CA签名的单独证书请求。

=item B<-ss_cert filename>

a single self-signed certificate to be signed by the CA.

一个要由CA签名的自签名证书。

=item B<-spkac filename>

a file containing a single Netscape signed public key and challenge
and additional field values to be signed by the CA. See the B<SPKAC FORMAT>
section for information on the required input and output format.

一个包含了一个单独的Netscape签名的公钥和其他附加用户信息。
关于输入输出格式的信息具体可以参考SPKAC部分。

=item B<-infiles>

if present this should be the last option, all subsequent arguments
are taken as the names of files containing certificate requests.

该选项总是作为指令的最后一个选项，其后面所有的参数都被认为是证书请求文件。

=item B<-out filename>

the output file to output certificates to. The default is standard
output. The certificate details will also be printed out to this
file in PEM format (except that B<-spkac> outputs DER format).

输出文件输出签发好的证书。默认值为标准输出。输出的证书都是PEM编码的（除了spkac输出DER编码）

=item B<-outdir directory>

the directory to output certificates to. The certificate will be
written to a filename consisting of the serial number in hex with
".pem" appended.

将新生成的证书输出到目录。新生成证书将会序列号加“pem”后缀成为一个完整的证书文件名。

=item B<-cert>

the CA certificate file.

CA证书文件。

=item B<-keyfile filename>

the private key to sign requests with.

用于签署请求的私钥。

=item B<-keyform PEM|DER>

the format of the data in the private key file.
The default is PEM.

私钥文件中数据的格式。默认为PEM。

=item B<-key password>

the password used to encrypt the private key. Since on some
systems the command line arguments are visible (e.g. Unix with
the 'ps' utility) this option should be used with caution.

用于加密私钥的密码。因为在某些系统上命令行参数是可见的（例如使用“ps”实用程序的Unix），应谨慎使用此选项。

=item B<-selfsign>

indicates the issued certificates are to be signed with the key
the certificate requests were signed with (given with B<-keyfile>).
Certificate requests signed with a different key are ignored.  If
B<-spkac>, B<-ss_cert> or B<-gencrl> are given, B<-selfsign> is
ignored.

A consequence of using B<-selfsign> is that the self-signed
certificate appears among the entries in the certificate database
(see the configuration option B<database>), and uses the same
serial number counter as all other certificates sign with the
self-signed certificate.

表示发出的证书将使用证书请求签名的密钥（以-keyfile命名）进行签名。
使用不同密钥签名的证书请求将被忽略。如果给出-spkac，-ss_cert或-gencrl，则忽略-selfsign

使用-selfsign的结果是自签名证书出现在证书数据库的条目中，并使用与其他证书相同的序列号计数器。

=item B<-passin arg>

the key password source. For more information about the format of B<arg>
see the B<PASS PHRASE ARGUMENTS> section in L<gmssl(1)>.

给定了读取私钥文件的时候需要提供的口令。

=item B<-notext>

don't output the text form of a certificate to the output file.

不把证书的文本形式输出到输出文件。

=item B<-startdate date>

this allows the start date to be explicitly set. The format of the
date is YYMMDDHHMMSSZ (the same as an ASN1 UTCTime structure).

设置证书的生效时间，其参数格式是“YYMMDDHHMMSSZ”。

=item B<-enddate date>

this allows the expiry date to be explicitly set. The format of the
date is YYMMDDHHMMSSZ (the same as an ASN1 UTCTime structure).

设置证书的到期时间，其参数格式是“YYMMDDHHMMSSZ”。

=item B<-days arg>

the number of days to certify the certificate for.

设置证书的有效天数。

=item B<-md alg>

the message digest to use.
Any digest supported by the GmSSL B<dgst> command can be used.
This option also applies to CRLs.

消息摘要使用。
可以使用GmSSL dgst命令支持的任何摘要。
该选项也适用于CRLs。

=item B<-policy arg>

this option defines the CA "policy" to use. This is a section in
the configuration file which decides which fields should be mandatory
or match the CA certificate. Check out the B<POLICY FORMAT> section
for more information.

该选项定义了CA的匹配策略。这是配置文件中的一部分，它决定了哪些字段应该是必须的
或与CA证书匹配。查看policy format部分来了解更多信息。

=item B<-msie_hack>

this is a legacy option to make B<ca> work with very old versions of
the IE certificate enrollment control "certenr3". It used UniversalStrings
for almost everything. Since the old control has various security bugs
its use is strongly discouraged. The newer control "Xenroll" does not
need this option.

这是一个遗留的项目，它可以使ca可以使用非常老的ie证书注册控件centenr3.它几乎所有东西
都使用了UniversalStrings。我们非常不推荐使用旧版控件应为它有很多的安全漏洞。新的控件
Xenroll不需要这一项。

=item B<-preserveDN>

Normally the DN order of a certificate is the same as the order of the
fields in the relevant policy section. When this option is set the order
is the same as the request. This is largely for compatibility with the
older IE enrollment control which would only accept certificates if their
DNs match the order of the request. This is not needed for Xenroll.

使指令在签发证书的时候让证书主体名称内的各项内容顺序跟证书请求中的顺序保持一致。
而在默认情况下，证书主题名称内的各个选项顺序是按照配置文件中的证书匹配策略子段的
选项顺序进行排列的。


=item B<-noemailDN>

The DN of a certificate can contain the EMAIL field if present in the
request DN, however it is good policy just having the e-mail set into
the altName extension of the certificate. When this option is set the
EMAIL field is removed from the certificate' subject and set only in
the, eventually present, extensions. The B<email_in_dn> keyword can be
used in the configuration file to enable this behaviour.



=item B<-batch>

this sets the batch mode. In this mode no questions will be asked
and all certificates will be certified automatically.

=item B<-extensions section>

the section of the configuration file containing certificate extensions
to be added when a certificate is issued (defaults to B<x509_extensions>
unless the B<-extfile> option is used). If no extension section is
present then, a V1 certificate is created. If the extension section
is present (even if it is empty), then a V3 certificate is created. See the:w
L<x509v3_config(5)> manual page for details of the
extension section format.

=item B<-extfile file>

an additional configuration file to read certificate extensions from
(using the default section unless the B<-extensions> option is also
used).

=item B<-engine id>

specifying an engine (by its unique B<id> string) will cause B<ca>
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.

=item B<-subj arg>

supersedes subject name given in the request.
The arg must be formatted as I</type0=value0/type1=value1/type2=...>,
characters may be escaped by \ (backslash), no spaces are skipped.

=item B<-utf8>

this option causes field values to be interpreted as UTF8 strings, by
default they are interpreted as ASCII. This means that the field
values, whether prompted from a terminal or obtained from a
configuration file, must be valid UTF8 strings.

=item B<-create_serial>

if reading serial from the text file as specified in the configuration
fails, specifying this option creates a new random serial to be used as next
serial number.

=item B<-multivalue-rdn>

This option causes the -subj argument to be interpreted with full
support for multivalued RDNs. Example:

I</DC=org/DC=GmSSL/DC=users/UID=123456+CN=John Doe>

If -multi-rdn is not used then the UID value is I<123456+CN=John Doe>.

=back

=head1 CRL OPTIONS

=over 4

=item B<-gencrl>

this option generates a CRL based on information in the index file.

=item B<-crldays num>

the number of days before the next CRL is due. That is the days from
now to place in the CRL nextUpdate field.

=item B<-crlhours num>

the number of hours before the next CRL is due.

=item B<-revoke filename>

a filename containing a certificate to revoke.

=item B<-valid filename>

a filename containing a certificate to add a Valid certificate entry.

=item B<-status serial>

displays the revocation status of the certificate with the specified
serial number and exits.

=item B<-updatedb>

Updates the database index to purge expired certificates.

=item B<-crl_reason reason>

revocation reason, where B<reason> is one of: B<unspecified>, B<keyCompromise>,
B<CACompromise>, B<affiliationChanged>, B<superseded>, B<cessationOfOperation>,
B<certificateHold> or B<removeFromCRL>. The matching of B<reason> is case
insensitive. Setting any revocation reason will make the CRL v2.

In practice B<removeFromCRL> is not particularly useful because it is only used
in delta CRLs which are not currently implemented.

=item B<-crl_hold instruction>

This sets the CRL revocation reason code to B<certificateHold> and the hold
instruction to B<instruction> which must be an OID. Although any OID can be
used only B<holdInstructionNone> (the use of which is discouraged by RFC2459)
B<holdInstructionCallIssuer> or B<holdInstructionReject> will normally be used.

=item B<-crl_compromise time>

This sets the revocation reason to B<keyCompromise> and the compromise time to
B<time>. B<time> should be in GeneralizedTime format that is B<YYYYMMDDHHMMSSZ>.

=item B<-crl_CA_compromise time>

This is the same as B<crl_compromise> except the revocation reason is set to
B<CACompromise>.

=item B<-crlexts section>

the section of the configuration file containing CRL extensions to
include. If no CRL extension section is present then a V1 CRL is
created, if the CRL extension section is present (even if it is
empty) then a V2 CRL is created. The CRL extensions specified are
CRL extensions and B<not> CRL entry extensions.  It should be noted
that some software (for example Netscape) can't handle V2 CRLs. See
L<x509v3_config(5)> manual page for details of the
extension section format.

=back

=head1 CONFIGURATION FILE OPTIONS

The section of the configuration file containing options for B<ca>
is found as follows: If the B<-name> command line option is used,
then it names the section to be used. Otherwise the section to
be used must be named in the B<default_ca> option of the B<ca> section
of the configuration file (or in the default section of the
configuration file). Besides B<default_ca>, the following options are
read directly from the B<ca> section:
 RANDFILE
 preserve
 msie_hack
With the exception of B<RANDFILE>, this is probably a bug and may
change in future releases.

Many of the configuration file options are identical to command line
options. Where the option is present in the configuration file
and the command line the command line value is used. Where an
option is described as mandatory then it must be present in
the configuration file or the command line equivalent (if
any) used.

=over 4

=item B<oid_file>

This specifies a file containing additional B<OBJECT IDENTIFIERS>.
Each line of the file should consist of the numerical form of the
object identifier followed by white space then the short name followed
by white space and finally the long name.

=item B<oid_section>

This specifies a section in the configuration file containing extra
object identifiers. Each line should consist of the short name of the
object identifier followed by B<=> and the numerical form. The short
and long names are the same when this option is used.

=item B<new_certs_dir>

the same as the B<-outdir> command line option. It specifies
the directory where new certificates will be placed. Mandatory.

=item B<certificate>

the same as B<-cert>. It gives the file containing the CA
certificate. Mandatory.

=item B<private_key>

same as the B<-keyfile> option. The file containing the
CA private key. Mandatory.

=item B<RANDFILE>

a file used to read and write random number seed information, or
an EGD socket (see L<RAND_egd(3)>).

=item B<default_days>

the same as the B<-days> option. The number of days to certify
a certificate for.

=item B<default_startdate>

the same as the B<-startdate> option. The start date to certify
a certificate for. If not set the current time is used.

=item B<default_enddate>

the same as the B<-enddate> option. Either this option or
B<default_days> (or the command line equivalents) must be
present.

=item B<default_crl_hours default_crl_days>

the same as the B<-crlhours> and the B<-crldays> options. These
will only be used if neither command line option is present. At
least one of these must be present to generate a CRL.

=item B<default_md>

the same as the B<-md> option. Mandatory.

=item B<database>

the text database file to use. Mandatory. This file must be present
though initially it will be empty.

=item B<unique_subject>

if the value B<yes> is given, the valid certificate entries in the
database must have unique subjects.  if the value B<no> is given,
several valid certificate entries may have the exact same subject.
The default value is B<yes>, to be compatible with older (pre 0.9.8)
versions of GmSSL.  However, to make CA certificate roll-over easier,
it's recommended to use the value B<no>, especially if combined with
the B<-selfsign> command line option.

=item B<serial>

a text file containing the next serial number to use in hex. Mandatory.
This file must be present and contain a valid serial number.

=item B<crlnumber>

a text file containing the next CRL number to use in hex. The crl number
will be inserted in the CRLs only if this file exists. If this file is
present, it must contain a valid CRL number.

=item B<x509_extensions>

the same as B<-extensions>.

=item B<crl_extensions>

the same as B<-crlexts>.

=item B<preserve>

the same as B<-preserveDN>

=item B<email_in_dn>

the same as B<-noemailDN>. If you want the EMAIL field to be removed
from the DN of the certificate simply set this to 'no'. If not present
the default is to allow for the EMAIL filed in the certificate's DN.

=item B<msie_hack>

the same as B<-msie_hack>

=item B<policy>

the same as B<-policy>. Mandatory. See the B<POLICY FORMAT> section
for more information.

=item B<name_opt>, B<cert_opt>

these options allow the format used to display the certificate details
when asking the user to confirm signing. All the options supported by
the B<x509> utilities B<-nameopt> and B<-certopt> switches can be used
here, except the B<no_signame> and B<no_sigdump> are permanently set
and cannot be disabled (this is because the certificate signature cannot
be displayed because the certificate has not been signed at this point).

For convenience the values B<ca_default> are accepted by both to produce
a reasonable output.

If neither option is present the format used in earlier versions of
GmSSL is used. Use of the old format is B<strongly> discouraged because
it only displays fields mentioned in the B<policy> section, mishandles
multicharacter string types and does not display extensions.

=item B<copy_extensions>

determines how extensions in certificate requests should be handled.
If set to B<none> or this option is not present then extensions are
ignored and not copied to the certificate. If set to B<copy> then any
extensions present in the request that are not already present are copied
to the certificate. If set to B<copyall> then all extensions in the
request are copied to the certificate: if the extension is already present
in the certificate it is deleted first. See the B<WARNINGS> section before
using this option.

The main use of this option is to allow a certificate request to supply
values for certain extensions such as subjectAltName.

=back

=head1 POLICY FORMAT

The policy section consists of a set of variables corresponding to
certificate DN fields. If the value is "match" then the field value
must match the same field in the CA certificate. If the value is
"supplied" then it must be present. If the value is "optional" then
it may be present. Any fields not mentioned in the policy section
are silently deleted, unless the B<-preserveDN> option is set but
this can be regarded more of a quirk than intended behaviour.

=head1 SPKAC FORMAT

The input to the B<-spkac> command line option is a Netscape
signed public key and challenge. This will usually come from
the B<KEYGEN> tag in an HTML form to create a new private key.
It is however possible to create SPKACs using the B<spkac> utility.

The file should contain the variable SPKAC set to the value of
the SPKAC and also the required DN components as name value pairs.
If you need to include the same component twice then it can be
preceded by a number and a '.'.

When processing SPKAC format, the output is DER if the B<-out>
flag is used, but PEM format if sending to stdout or the B<-outdir>
flag is used.

=head1 EXAMPLES

Note: these examples assume that the B<ca> directory structure is
already set up and the relevant files already exist. This usually
involves creating a CA certificate and private key with B<req>, a
serial number file and an empty index file and placing them in
the relevant directories.

To use the sample configuration file below the directories demoCA,
demoCA/private and demoCA/newcerts would be created. The CA
certificate would be copied to demoCA/cacert.pem and its private
key to demoCA/private/cakey.pem. A file demoCA/serial would be
created containing for example "01" and the empty index file
demoCA/index.txt.


Sign a certificate request:

 gmssl ca -in req.pem -out newcert.pem

Sign a certificate request, using CA extensions:

 gmssl ca -in req.pem -extensions v3_ca -out newcert.pem

Generate a CRL

 gmssl ca -gencrl -out crl.pem

Sign several requests:

 gmssl ca -infiles req1.pem req2.pem req3.pem

Certify a Netscape SPKAC:

 gmssl ca -spkac spkac.txt

A sample SPKAC file (the SPKAC line has been truncated for clarity):

 SPKAC=MIG0MGAwXDANBgkqhkiG9w0BAQEFAANLADBIAkEAn7PDhCeV/xIxUg8V70YRxK2A5
 CN=Steve Test
 emailAddress=steve@gmssl.org
 0.OU=GmSSL Group
 1.OU=Another Group

A sample configuration file with the relevant sections for B<ca>:

 [ ca ]
 default_ca      = CA_default            # The default ca section

 [ CA_default ]

 dir            = ./demoCA              # top dir
 database       = $dir/index.txt        # index file.
 new_certs_dir  = $dir/newcerts         # new certs dir

 certificate    = $dir/cacert.pem       # The CA cert
 serial         = $dir/serial           # serial no file
 private_key    = $dir/private/cakey.pem# CA private key
 RANDFILE       = $dir/private/.rand    # random number file

 default_days   = 365                   # how long to certify for
 default_crl_days= 30                   # how long before next CRL
 default_md     = md5                   # md to use

 policy         = policy_any            # default policy
 email_in_dn    = no                    # Don't add the email into cert DN

 name_opt       = ca_default            # Subject name display option
 cert_opt       = ca_default            # Certificate display option
 copy_extensions = none                 # Don't copy extensions from request

 [ policy_any ]
 countryName            = supplied
 stateOrProvinceName    = optional
 organizationName       = optional
 organizationalUnitName = optional
 commonName             = supplied
 emailAddress           = optional

=head1 FILES

Note: the location of all files can change either by compile time options,
configuration file entries, environment variables or command line options.
The values below reflect the default values.

 /usr/local/ssl/lib/openssl.cnf - master configuration file
 ./demoCA                       - main CA directory
 ./demoCA/cacert.pem            - CA certificate
 ./demoCA/private/cakey.pem     - CA private key
 ./demoCA/serial                - CA serial number file
 ./demoCA/serial.old            - CA serial number backup file
 ./demoCA/index.txt             - CA text database file
 ./demoCA/index.txt.old         - CA text database backup file
 ./demoCA/certs                 - certificate output file
 ./demoCA/.rnd                  - CA random seed information

=head1 ENVIRONMENT VARIABLES

B<OPENSSL_CONF> reflects the location of master configuration file it can
be overridden by the B<-config> command line option.

=head1 RESTRICTIONS

The text database index file is a critical part of the process and
if corrupted it can be difficult to fix. It is theoretically possible
to rebuild the index file from all the issued certificates and a current
CRL: however there is no option to do this.

V2 CRL features like delta CRLs are not currently supported.

Although several requests can be input and handled at once it is only
possible to include one SPKAC or self-signed certificate.

=head1 BUGS

The use of an in-memory text database can cause problems when large
numbers of certificates are present because, as the name implies
the database has to be kept in memory.

The B<ca> command really needs rewriting or the required functionality
exposed at either a command or interface level so a more friendly utility
(perl script or GUI) can handle things properly. The script
B<CA.pl> helps a little but not very much.

Any fields in a request that are not present in a policy are silently
deleted. This does not happen if the B<-preserveDN> option is used. To
enforce the absence of the EMAIL field within the DN, as suggested by
RFCs, regardless the contents of the request' subject the B<-noemailDN>
option can be used. The behaviour should be more friendly and
configurable.

Canceling some commands by refusing to certify a certificate can
create an empty file.

=head1 WARNINGS

The B<ca> command is quirky and at times downright unfriendly.

The B<ca> utility was originally meant as an example of how to do things
in a CA. It was not supposed to be used as a full blown CA itself:
nevertheless some people are using it for this purpose.

The B<ca> command is effectively a single user command: no locking is
done on the various files and attempts to run more than one B<ca> command
on the same database can have unpredictable results.

The B<copy_extensions> option should be used with caution. If care is
not taken then it can be a security risk. For example if a certificate
request contains a basicConstraints extension with CA:TRUE and the
B<copy_extensions> value is set to B<copyall> and the user does not spot
this when the certificate is displayed then this will hand the requester
a valid CA certificate.

This situation can be avoided by setting B<copy_extensions> to B<copy>
and including basicConstraints with CA:FALSE in the configuration file.
Then if the request contains a basicConstraints extension it will be
ignored.

It is advisable to also include values for other extensions such
as B<keyUsage> to prevent a request supplying its own values.

Additional restrictions can be placed on the CA certificate itself.
For example if the CA certificate has:

 basicConstraints = CA:TRUE, pathlen:0

then even if a certificate is issued with CA:TRUE it will not be valid.

=head1 SEE ALSO

L<req(1)>, L<spkac(1)>, L<x509(1)>, L<CA.pl(1)>,
L<config(5)>, L<x509v3_config(5)>

=head1 COPYRIGHT

Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the GmSSL license (the "License").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.

=cut