=pod
+=for comment openssl_manual_section:5
+
=head1 NAME
config - OpenSSL CONF library configuration files
variables can be substituted. It is also possible to assign values to
environment variables by using the name B<ENV::name>, this will work
if the program looks up environment variables using the B<CONF> library
-instead of calling B<getenv()> directly.
+instead of calling getenv() directly.
It is possible to escape certain characters by using any kind of quote
or the B<\> character. By making the last character of a line a B<\>
=head1 OPENSSL LIBRARY CONFIGURATION
-In OpenSSL 0.9.7 and later applications can automatically configure certain
+Applications can automatically configure certain
aspects of OpenSSL using the master OpenSSL configuration file, or optionally
an alternative configuration file. The B<openssl> utility includes this
functionality: any sub command uses the master OpenSSL configuration file
... engine stuff here ...
-Currently there are two supported configuration modules supported. One for
-ASN1 objects another for ENGINE configuration.
+The features of each configuration module are described below.
=head2 ASN1 OBJECT CONFIGURATION MODULE
some_new_oid = 1.2.3.4
some_other_oid = 1.2.3.5
+It is also possible to set the value to the long name followed
+by a comma and the numerical OID form. For example:
+
+ shortName = some object long name, 1.2.3.4
+
=head2 ENGINE CONFIGURATION MODULE
-To be continued...
+This ENGINE configuration module has the name B<engines>. The value of this
+variable points to a section containing further ENGINE configuration
+information.
+
+The section pointed to by B<engines> is a table of engine names (though see
+B<engine_id> below) and further sections containing configuration information
+specific to each ENGINE.
+
+Each ENGINE specific section is used to set default algorithms, load
+dynamic, perform initialization and send ctrls. The actual operation performed
+depends on the I<command> name which is the name of the name value pair. The
+currently supported commands are listed below.
+
+For example:
+
+ [engine_section]
+
+ # Configure ENGINE named "foo"
+ foo = foo_section
+ # Configure ENGINE named "bar"
+ bar = bar_section
+
+ [foo_section]
+ ... foo ENGINE specific commands ...
+
+ [bar_section]
+ ... "bar" ENGINE specific commands ...
+
+The command B<engine_id> is used to give the ENGINE name. If used this
+command must be first. For example:
+
+ [engine_section]
+ # This would normally handle an ENGINE named "foo"
+ foo = foo_section
+
+ [foo_section]
+ # Override default name and use "myfoo" instead.
+ engine_id = myfoo
+
+The command B<dynamic_path> loads and adds an ENGINE from the given path. It
+is equivalent to sending the ctrls B<SO_PATH> with the path argument followed
+by B<LIST_ADD> with value 2 and B<LOAD> to the dynamic ENGINE. If this is
+not the required behaviour then alternative ctrls can be sent directly
+to the dynamic ENGINE using ctrl commands.
+
+The command B<init> determines whether to initialize the ENGINE. If the value
+is B<0> the ENGINE will not be initialized, if B<1> and attempt it made to
+initialized the ENGINE immediately. If the B<init> command is not present
+then an attempt will be made to initialize the ENGINE after all commands in
+its section have been processed.
+
+The command B<default_algorithms> sets the default algorithms an ENGINE will
+supply using the functions ENGINE_set_default_string().
+
+If the name matches none of the above command names it is assumed to be a
+ctrl command which is sent to the ENGINE. The value of the command is the
+argument to the ctrl command. If the value is the string B<EMPTY> then no
+value is sent to the command.
+
+For example:
+
+
+ [engine_section]
+
+ # Configure ENGINE named "foo"
+ foo = foo_section
+
+ [foo_section]
+ # Load engine from DSO
+ dynamic_path = /some/path/fooengine.so
+ # A foo specific ctrl.
+ some_ctrl = some_value
+ # Another ctrl that doesn't take a value.
+ other_ctrl = EMPTY
+ # Supply all default algorithms
+ default_algorithms = ALL
+
+=head2 EVP CONFIGURATION MODULE
+
+This modules has the name B<alg_section> which points to a section containing
+algorithm commands.
+
+Currently the only algorithm command supported is B<fips_mode> whose
+value should be a boolean string such as B<on> or B<off>. If the value is
+B<on> this attempt to enter FIPS mode. If the call fails or the library is
+not FIPS capable then an error occurs.
+
+For example:
+
+ alg_section = evp_settings
+
+ [evp_settings]
+
+ fips_mode = on
+
+=head2 SSL CONFIGURATION MODULE
+
+This module has the name B<ssl_conf> which points to a section containing
+SSL configurations.
+
+Each line in the SSL configuration section contains the name of the
+configuration and the section containing it.
+
+Each configuration section consists of command value pairs for B<SSL_CONF>.
+Each pair will be passed to a B<SSL_CTX> or B<SSL> structure if it calls
+SSL_CTX_config() or SSL_config() with the appropriate configuration name.
+
+Note: any characters before an initial dot in the configuration section are
+ignored so the same command can be used multiple times.
+
+For example:
+
+ ssl_conf = ssl_sect
+
+ [ssl_sect]
+
+ server = server_section
+
+ [server_section]
+
+ RSA.Certificate = server-rsa.pem
+ ECDSA.Certificate = server-ecdsa.pem
+ Ciphers = ALL:!RC4
=head1 NOTES
# The above value is used if TEMP isn't in the environment
tmpfile=${ENV::TEMP}/tmp.filename
+Simple OpenSSL library configuration example to enter FIPS mode:
+
+ # Default appname: should match "appname" parameter (if any)
+ # supplied to CONF_modules_load_file et al.
+ openssl_conf = openssl_conf_section
+
+ [openssl_conf_section]
+ # Configuration module list
+ alg_section = evp_sect
+
+ [evp_sect]
+ # Set to "yes" to enter FIPS mode if supported
+ fips_mode = yes
+
+Note: in the above example you will get an error in non FIPS capable versions
+of OpenSSL.
+
+More complex OpenSSL library configuration. Add OID and don't enter FIPS mode:
+
+ # Default appname: should match "appname" parameter (if any)
+ # supplied to CONF_modules_load_file et al.
+ openssl_conf = openssl_conf_section
+
+ [openssl_conf_section]
+ # Configuration module list
+ alg_section = evp_sect
+ oid_section = new_oids
+
+ [evp_sect]
+ # This will have no effect as FIPS mode is off by default.
+ # Set to "yes" to enter FIPS mode, if supported
+ fips_mode = no
+
+ [new_oids]
+ # New OID, just short name
+ newoid1 = 1.2.3.4.1
+ # New OID shortname and long name
+ newoid2 = New OID 2 long name, 1.2.3.4.2
+
+The above examples can be used with with any application supporting library
+configuration if "openssl_conf" is modified to match the appropriate "appname".
+
+For example if the second sample file above is saved to "example.cnf" then
+the command line:
+
+ OPENSSL_CONF=example.cnf openssl asn1parse -genstr OID:1.2.3.4.1
+
+will output:
+
+ 0:d=0 hl=2 l= 4 prim: OBJECT :newoid1
+
+showing that the OID "newoid1" has been added as "1.2.3.4.1".
+
=head1 BUGS
Currently there is no way to include characters using the octal B<\nnn>
=head1 SEE ALSO
-L<x509(1)|x509(1)>, L<req(1)|req(1)>, L<ca(1)|ca(1)>
+L<x509(1)>, L<req(1)>, L<ca(1)>
=cut
projects / openssl.git / blobdiff