6ab6deccd9
Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/2688)
264 lines
10 KiB
Text
264 lines
10 KiB
Text
=pod
|
|
|
|
=head1 NAME
|
|
|
|
OSSL_STORE_LOADER, OSSL_STORE_LOADER_CTX, OSSL_STORE_LOADER_new,
|
|
OSSL_STORE_LOADER_get0_engine, OSSL_STORE_LOADER_get0_scheme,
|
|
OSSL_STORE_LOADER_set_open, OSSL_STORE_LOADER_set_ctrl,
|
|
OSSL_STORE_LOADER_set_expect, OSSL_STORE_LOADER_set_find,
|
|
OSSL_STORE_LOADER_set_load, OSSL_STORE_LOADER_set_eof,
|
|
OSSL_STORE_LOADER_set_error, OSSL_STORE_LOADER_set_close,
|
|
OSSL_STORE_LOADER_free, OSSL_STORE_register_loader,
|
|
OSSL_STORE_unregister_loader, OSSL_STORE_open_fn, OSSL_STORE_ctrl_fn,
|
|
OSSL_STORE_expect_fn, OSSL_STORE_find_fn,
|
|
OSSL_STORE_load_fn, OSSL_STORE_eof_fn, OSSL_STORE_error_fn,
|
|
OSSL_STORE_close_fn - Types and functions to manipulate, register and
|
|
unregister STORE loaders for different URI schemes
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/store.h>
|
|
|
|
typedef struct ossl_store_loader_st OSSL_STORE_LOADER;
|
|
|
|
OSSL_STORE_LOADER *OSSL_STORE_LOADER_new(ENGINE *e, const char *scheme);
|
|
const ENGINE *OSSL_STORE_LOADER_get0_engine(const OSSL_STORE_LOADER
|
|
*store_loader);
|
|
const char *OSSL_STORE_LOADER_get0_scheme(const OSSL_STORE_LOADER
|
|
*store_loader);
|
|
|
|
/* struct ossl_store_loader_ctx_st is defined differently by each loader */
|
|
typedef struct ossl_store_loader_ctx_st OSSL_STORE_LOADER_CTX;
|
|
|
|
typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_fn)(const char *uri,
|
|
const UI_METHOD *ui_method,
|
|
void *ui_data);
|
|
int OSSL_STORE_LOADER_set_open(OSSL_STORE_LOADER *store_loader,
|
|
OSSL_STORE_open_fn store_open_function);
|
|
typedef int (*OSSL_STORE_ctrl_fn)(OSSL_STORE_LOADER_CTX *ctx, int cmd,
|
|
va_list args);
|
|
int OSSL_STORE_LOADER_set_ctrl(OSSL_STORE_LOADER *store_loader,
|
|
OSSL_STORE_ctrl_fn store_ctrl_function);
|
|
typedef int (*OSSL_STORE_expect_fn)(OSSL_STORE_LOADER_CTX *ctx, int expected);
|
|
int OSSL_STORE_LOADER_set_expect(OSSL_STORE_LOADER *loader,
|
|
OSSL_STORE_expect_fn expect_function);
|
|
typedef int (*OSSL_STORE_find_fn)(OSSL_STORE_LOADER_CTX *ctx,
|
|
OSSL_STORE_SEARCH *criteria);
|
|
int OSSL_STORE_LOADER_set_find(OSSL_STORE_LOADER *loader,
|
|
OSSL_STORE_find_fn find_function);
|
|
typedef OSSL_STORE_INFO *(*OSSL_STORE_load_fn)(OSSL_STORE_LOADER_CTX *ctx,
|
|
UI_METHOD *ui_method,
|
|
void *ui_data);
|
|
int OSSL_STORE_LOADER_set_load(OSSL_STORE_LOADER *store_loader,
|
|
OSSL_STORE_load_fn store_load_function);
|
|
typedef int (*OSSL_STORE_eof_fn)(OSSL_STORE_LOADER_CTX *ctx);
|
|
int OSSL_STORE_LOADER_set_eof(OSSL_STORE_LOADER *store_loader,
|
|
OSSL_STORE_eof_fn store_eof_function);
|
|
typedef int (*OSSL_STORE_error_fn)(OSSL_STORE_LOADER_CTX *ctx);
|
|
int OSSL_STORE_LOADER_set_error(OSSL_STORE_LOADER *store_loader,
|
|
OSSL_STORE_error_fn store_error_function);
|
|
typedef int (*OSSL_STORE_close_fn)(OSSL_STORE_LOADER_CTX *ctx);
|
|
int OSSL_STORE_LOADER_set_close(OSSL_STORE_LOADER *store_loader,
|
|
OSSL_STORE_close_fn store_close_function);
|
|
void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *store_loader);
|
|
|
|
int OSSL_STORE_register_loader(OSSL_STORE_LOADER *loader);
|
|
OSSL_STORE_LOADER *OSSL_STORE_unregister_loader(const char *scheme);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
These functions help applications and engines to create loaders for
|
|
schemes they support.
|
|
|
|
=head2 Types
|
|
|
|
B<OSSL_STORE_LOADER> is the type to hold a loader.
|
|
It contains a scheme and the functions needed to implement
|
|
OSSL_STORE_open(), OSSL_STORE_load(), OSSL_STORE_eof(), OSSL_STORE_error() and
|
|
OSSL_STORE_close() for this scheme.
|
|
|
|
B<OSSL_STORE_LOADER_CTX> is a type template, to be defined by each loader
|
|
using B<struct ossl_store_loader_ctx_st { ... }>.
|
|
|
|
B<OSSL_STORE_open_fn>, B<OSSL_STORE_ctrl_fn>, B<OSSL_STORE_expect_fn>,
|
|
B<OSSL_STORE_find_fn>, B<OSSL_STORE_load_fn>, B<OSSL_STORE_eof_fn>,
|
|
and B<OSSL_STORE_close_fn>
|
|
are the function pointer types used within a STORE loader.
|
|
The functions pointed at define the functionality of the given loader.
|
|
|
|
=over 4
|
|
|
|
=item B<OSSL_STORE_open_fn>
|
|
|
|
This function takes a URI and is expected to interpret it in the best
|
|
manner possible according to the scheme the loader implements, it also
|
|
takes a B<UI_METHOD> and associated data, to be used any time
|
|
something needs to be prompted for.
|
|
Furthermore, this function is expected to initialize what needs to be
|
|
initialized, to create a privata data store (B<OSSL_STORE_LOADER_CTX>, see
|
|
above), and to return it.
|
|
If something goes wrong, this function is expected to return NULL.
|
|
|
|
=item B<OSSL_STORE_ctrl_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer, a command number
|
|
B<cmd> and a B<va_list> B<args> and is used to manipulate loader
|
|
specific parameters.
|
|
|
|
=begin comment
|
|
|
|
Globally known command numbers are documented in L<OSSL_STORE_ctrl(3)>,
|
|
along with what B<args> are expected with each of them.
|
|
|
|
=end comment
|
|
|
|
Loader specific command numbers must begin at B<OSSL_STORE_C_CUSTOM_START>.
|
|
Any number below that is reserved for future globally known command
|
|
numbers.
|
|
|
|
This function is expected to return 1 on success, 0 on error.
|
|
|
|
=item B<OSSL_STORE_expect_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer and a B<OSSL_STORE_INFO>
|
|
identity B<expected>, and is used to tell the loader what object type is
|
|
expected.
|
|
B<expected> may be zero to signify that no specific object type is expected.
|
|
|
|
This function is expected to return 1 on success, 0 on error.
|
|
|
|
=item B<OSSL_STORE_find_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer and a
|
|
B<OSSL_STORE_SEARCH> search criterion, and is used to tell the loader what
|
|
to search for.
|
|
|
|
When called with the loader context being B<NULL>, this function is expected
|
|
to return 1 if the loader supports the criterion, otherwise 0.
|
|
|
|
When called with the loader context being something other than B<NULL>, this
|
|
function is expected to return 1 on success, 0 on error.
|
|
|
|
=item B<OSSL_STORE_load_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer and a B<UI_METHOD>
|
|
with associated data.
|
|
It's expected to load the next available data, mold it into a data
|
|
structure that can be wrapped in a B<OSSL_STORE_INFO> using one of the
|
|
L<OSSL_STORE_INFO(3)> functions.
|
|
If no more data is available or an error occurs, this function is
|
|
expected to return NULL.
|
|
The B<OSSL_STORE_eof_fn> and B<OSSL_STORE_error_fn> functions must indicate if
|
|
it was in fact the end of data or if an error occurred.
|
|
|
|
Note that this function retrieves I<one> data item only.
|
|
|
|
=item B<OSSL_STORE_eof_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer and is expected to
|
|
return 1 to indicate that the end of available data has been reached.
|
|
It is otherwise expected to return 0.
|
|
|
|
=item B<OSSL_STORE_error_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer and is expected to
|
|
return 1 to indicate that an error occured in a previous call to the
|
|
B<OSSL_STORE_load_fn> function.
|
|
It is otherwise expected to return 0.
|
|
|
|
=item B<OSSL_STORE_close_fn>
|
|
|
|
This function takes a B<OSSL_STORE_LOADER_CTX> pointer and is expected to
|
|
close or shut down what needs to be closed, and finally free the
|
|
contents of the B<OSSL_STORE_LOADER_CTX> pointer.
|
|
It returns 1 on success and 0 on error.
|
|
|
|
=back
|
|
|
|
=head2 Functions
|
|
|
|
OSSL_STORE_LOADER_new() creates a new B<OSSL_STORE_LOADER>.
|
|
It takes an B<ENGINE> B<e> and a string B<scheme>.
|
|
B<scheme> must I<always> be set.
|
|
Both B<e> and B<scheme> are used as is and must therefore be alive as
|
|
long as the created loader is.
|
|
|
|
OSSL_STORE_LOADER_get0_engine() returns the engine of the B<store_loader>.
|
|
OSSL_STORE_LOADER_get0_scheme() returns the scheme of the B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_set_open() sets the opener function for the
|
|
B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_set_ctrl() sets the control function for the
|
|
B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_set_expect() sets the expect function for the
|
|
B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_set_load() sets the loader function for the
|
|
B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_set_eof() sets the end of file checker function for the
|
|
B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_set_close() sets the closing function for the
|
|
B<store_loader>.
|
|
|
|
OSSL_STORE_LOADER_free() frees the given B<store_loader>.
|
|
|
|
OSSL_STORE_register_loader() register the given B<store_loader> and thereby
|
|
makes it available for use with OSSL_STORE_open(), OSSL_STORE_load(),
|
|
OSSL_STORE_eof() and OSSL_STORE_close().
|
|
|
|
OSSL_STORE_unregister_loader() unregister the store loader for the given
|
|
B<scheme>.
|
|
|
|
=head1 NOTES
|
|
|
|
The B<file:> scheme has built in support.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
The functions with the types B<OSSL_STORE_open_fn>, B<OSSL_STORE_ctrl_fn>,
|
|
B<OSSL_STORE_expect_fn>,
|
|
B<OSSL_STORE_load_fn>, B<OSSL_STORE_eof_fn> and B<OSSL_STORE_close_fn> have the
|
|
same return values as OSSL_STORE_open(), OSSL_STORE_ctrl(), OSSL_STORE_expect(),
|
|
OSSL_STORE_load(), OSSL_STORE_eof() and OSSL_STORE_close(), respectively.
|
|
|
|
OSSL_STORE_LOADER_new() returns a pointer to a B<OSSL_STORE_LOADER> on success,
|
|
or B<NULL> on failure.
|
|
|
|
OSSL_STORE_LOADER_set_open(), OSSL_STORE_LOADER_set_ctrl(),
|
|
OSSL_STORE_LOADER_set_load(), OSSL_STORE_LOADER_set_eof() and
|
|
OSSL_STORE_LOADER_set_close() return 1 on success, or 0 on failure.
|
|
|
|
OSSL_STORE_register_loader() returns 1 on success, or 0 on failure.
|
|
|
|
OSSL_STORE_unregister_loader() returns the unregistered loader on success,
|
|
or B<NULL> on failure.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<ossl_store(7)>, L<OSSL_STORE_open(3)>
|
|
|
|
=head1 HISTORY
|
|
|
|
OSSL_STORE_LOADER(), OSSL_STORE_LOADER_CTX(), OSSL_STORE_LOADER_new(),
|
|
OSSL_STORE_LOADER_set0_scheme(), OSSL_STORE_LOADER_set_open(),
|
|
OSSL_STORE_LOADER_set_ctrl(), OSSL_STORE_LOADER_set_load(),
|
|
OSSL_STORE_LOADER_set_eof(), OSSL_STORE_LOADER_set_close(),
|
|
OSSL_STORE_LOADER_free(), OSSL_STORE_register_loader(),
|
|
OSSL_STORE_unregister_loader(), OSSL_STORE_open_fn(), OSSL_STORE_ctrl_fn(),
|
|
OSSL_STORE_load_fn(), OSSL_STORE_eof_fn() and OSSL_STORE_close_fn()
|
|
were added to OpenSSL 1.1.1.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the OpenSSL 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
|