mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-04 13:23:26 +01:00
237 lines
8.6 KiB
Plaintext
237 lines
8.6 KiB
Plaintext
|
=pod
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
provider-mac - The mac library E<lt>-E<gt> provider functions
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
=for openssl multiple includes
|
||
|
|
|
||
|
|
#include <openssl/core_dispatch.h>
|
||
|
|
#include <openssl/core_names.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* None of these are actual functions, but are displayed like this for
|
||
|
|
* the function signatures for functions that are offered as function
|
||
|
|
* pointers in OSSL_DISPATCH arrays.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Context management */
|
||
|
|
void *OSSL_FUNC_mac_newctx(void *provctx);
|
||
|
|
void OSSL_FUNC_mac_freectx(void *mctx);
|
||
|
|
void *OSSL_FUNC_mac_dupctx(void *src);
|
||
|
|
|
||
|
|
/* Encryption/decryption */
|
||
|
|
int OSSL_FUNC_mac_init(void *mctx, unsigned char *key, size_t keylen,
|
||
|
|
const OSSL_PARAM params[]);
|
||
|
|
int OSSL_FUNC_mac_update(void *mctx, const unsigned char *in, size_t inl);
|
||
|
|
int OSSL_FUNC_mac_final(void *mctx, unsigned char *out, size_t *outl, size_t outsize);
|
||
|
|
|
||
|
|
/* MAC parameter descriptors */
|
||
|
|
const OSSL_PARAM *OSSL_FUNC_mac_gettable_params(void *provctx);
|
||
|
|
const OSSL_PARAM *OSSL_FUNC_mac_gettable_ctx_params(void *mctx, void *provctx);
|
||
|
|
const OSSL_PARAM *OSSL_FUNC_mac_settable_ctx_params(void *mctx, void *provctx);
|
||
|
|
|
||
|
|
/* MAC parameters */
|
||
|
|
int OSSL_FUNC_mac_get_params(OSSL_PARAM params[]);
|
||
|
|
int OSSL_FUNC_mac_get_ctx_params(void *mctx, OSSL_PARAM params[]);
|
||
|
|
int OSSL_FUNC_mac_set_ctx_params(void *mctx, const OSSL_PARAM params[]);
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
This documentation is primarily aimed at provider authors. See L<provider(7)>
|
||
|
|
for further information.
|
||
|
|
|
||
|
|
The MAC operation enables providers to implement mac algorithms and make
|
||
|
|
them available to applications via the API functions L<EVP_MAC_init(3)>,
|
||
|
|
L<EVP_MAC_update(3)> and L<EVP_MAC_final(3)>.
|
||
|
|
|
||
|
|
All "functions" mentioned here are passed as function pointers between
|
||
|
|
F<libcrypto> and the provider in L<OSSL_DISPATCH(3)> arrays via
|
||
|
|
L<OSSL_ALGORITHM(3)> arrays that are returned by the provider's
|
||
|
|
provider_query_operation() function
|
||
|
|
(see L<provider-base(7)/Provider Functions>).
|
||
|
|
|
||
|
|
All these "functions" have a corresponding function type definition
|
||
|
|
named B<OSSL_FUNC_{name}_fn>, and a helper function to retrieve the
|
||
|
|
function pointer from an L<OSSL_DISPATCH(3)> element named
|
||
|
|
B<OSSL_FUNC_{name}>.
|
||
|
|
For example, the "function" OSSL_FUNC_mac_newctx() has these:
|
||
|
|
|
||
|
|
typedef void *(OSSL_FUNC_mac_newctx_fn)(void *provctx);
|
||
|
|
static ossl_inline OSSL_FUNC_mac_newctx_fn
|
||
|
|
OSSL_FUNC_mac_newctx(const OSSL_DISPATCH *opf);
|
||
|
|
|
||
|
|
L<OSSL_DISPATCH(3)> arrays are indexed by numbers that are provided as
|
||
|
|
macros in L<openssl-core_dispatch.h(7)>, as follows:
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_newctx OSSL_FUNC_MAC_NEWCTX
|
||
|
|
OSSL_FUNC_mac_freectx OSSL_FUNC_MAC_FREECTX
|
||
|
|
OSSL_FUNC_mac_dupctx OSSL_FUNC_MAC_DUPCTX
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_init OSSL_FUNC_MAC_INIT
|
||
|
|
OSSL_FUNC_mac_update OSSL_FUNC_MAC_UPDATE
|
||
|
|
OSSL_FUNC_mac_final OSSL_FUNC_MAC_FINAL
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_get_params OSSL_FUNC_MAC_GET_PARAMS
|
||
|
|
OSSL_FUNC_mac_get_ctx_params OSSL_FUNC_MAC_GET_CTX_PARAMS
|
||
|
|
OSSL_FUNC_mac_set_ctx_params OSSL_FUNC_MAC_SET_CTX_PARAMS
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_gettable_params OSSL_FUNC_MAC_GETTABLE_PARAMS
|
||
|
|
OSSL_FUNC_mac_gettable_ctx_params OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS
|
||
|
|
OSSL_FUNC_mac_settable_ctx_params OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS
|
||
|
|
|
||
|
|
A mac algorithm implementation may not implement all of these functions.
|
||
|
|
In order to be a consistent set of functions, at least the following functions
|
||
|
|
must be implemented: OSSL_FUNC_mac_newctx(), OSSL_FUNC_mac_freectx(), OSSL_FUNC_mac_init(),
|
||
|
|
OSSL_FUNC_mac_update(), OSSL_FUNC_mac_final().
|
||
|
|
All other functions are optional.
|
||
|
|
|
||
|
|
=head2 Context Management Functions
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_newctx() should create and return a pointer to a provider side
|
||
|
|
structure for holding context information during a mac operation.
|
||
|
|
A pointer to this context will be passed back in a number of the other mac
|
||
|
|
operation function calls.
|
||
|
|
The parameter I<provctx> is the provider context generated during provider
|
||
|
|
initialisation (see L<provider(7)>).
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_freectx() is passed a pointer to the provider side mac context in
|
||
|
|
the I<mctx> parameter.
|
||
|
|
If it receives NULL as I<mctx> value, it should not do anything other than
|
||
|
|
return.
|
||
|
|
This function should free any resources associated with that context.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_dupctx() should duplicate the provider side mac context in the
|
||
|
|
I<mctx> parameter and return the duplicate copy.
|
||
|
|
|
||
|
|
=head2 Encryption/Decryption Functions
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_init() initialises a mac operation given a newly created provider
|
||
|
|
side mac context in the I<mctx> parameter. The I<params> are set before setting
|
||
|
|
the MAC I<key> of I<keylen> bytes.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_update() is called to supply data for MAC computation of a previously
|
||
|
|
initialised mac operation.
|
||
|
|
The I<mctx> parameter contains a pointer to a previously initialised provider
|
||
|
|
side context.
|
||
|
|
OSSL_FUNC_mac_update() may be called multiple times for a single mac operation.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_final() completes the MAC computation started through previous
|
||
|
|
OSSL_FUNC_mac_init() and OSSL_FUNC_mac_update() calls.
|
||
|
|
The I<mctx> parameter contains a pointer to the provider side context.
|
||
|
|
The resulting MAC should be written to I<out> and the amount of data written
|
||
|
|
to I<*outl>, which should not exceed I<outsize> bytes.
|
||
|
|
The same expectations apply to I<outsize> as documented for
|
||
|
|
L<EVP_MAC_final(3)>.
|
||
|
|
|
||
|
|
=head2 Mac Parameters
|
||
|
|
|
||
|
|
See L<OSSL_PARAM(3)> for further details on the parameters structure used by
|
||
|
|
these functions.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_get_params() gets details of parameter values associated with the
|
||
|
|
provider algorithm and stores them in I<params>.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_set_ctx_params() sets mac parameters associated with the given
|
||
|
|
provider side mac context I<mctx> to I<params>.
|
||
|
|
Any parameter settings are additional to any that were previously set.
|
||
|
|
Passing NULL for I<params> should return true.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_get_ctx_params() gets details of currently set parameter values
|
||
|
|
associated with the given provider side mac context I<mctx> and stores them
|
||
|
|
in I<params>.
|
||
|
|
Passing NULL for I<params> should return true.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_gettable_params(), OSSL_FUNC_mac_gettable_ctx_params(),
|
||
|
|
and OSSL_FUNC_mac_settable_ctx_params() all return constant L<OSSL_PARAM(3)>
|
||
|
|
arrays as descriptors of the parameters that OSSL_FUNC_mac_get_params(),
|
||
|
|
OSSL_FUNC_mac_get_ctx_params(), and OSSL_FUNC_mac_set_ctx_params()
|
||
|
|
can handle, respectively. OSSL_FUNC_mac_gettable_ctx_params() and
|
||
|
|
OSSL_FUNC_mac_settable_ctx_params() will return the parameters associated
|
||
|
|
with the provider side context I<mctx> in its current state if it is
|
||
|
|
not NULL. Otherwise, they return the parameters associated with the
|
||
|
|
provider side algorithm I<provctx>.
|
||
|
|
|
||
|
|
All MAC implementations are expected to handle the following parameters:
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item with OSSL_FUNC_set_ctx_params():
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item "key" (B<OSSL_MAC_PARAM_KEY>) <octet string>
|
||
|
|
|
||
|
|
Sets the key in the associated MAC ctx. This is identical to passing a I<key>
|
||
|
|
argument to the OSSL_FUNC_mac_init() function.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
=item with OSSL_FUNC_get_params():
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item "size" (B<OSSL_MAC_PARAM_SIZE>) <integer>
|
||
|
|
|
||
|
|
Can be used to get the default MAC size (which might be the only allowable
|
||
|
|
MAC size for the implementation).
|
||
|
|
|
||
|
|
Note that some implementations allow setting the size that the resulting MAC
|
||
|
|
should have as well, see the documentation of the implementation.
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
=over 4
|
||
|
|
|
||
|
|
=item "size" (B<OSSL_MAC_PARAM_BLOCK_SIZE>) <integer>
|
||
|
|
|
||
|
|
Can be used to get the MAC block size (if supported by the algorithm).
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
=back
|
||
|
|
|
||
|
|
=head1 NOTES
|
||
|
|
|
||
|
|
The MAC life-cycle is described in L<life_cycle-rand(7)>. Providers should
|
||
|
|
ensure that the various transitions listed there are supported. At some point
|
||
|
|
the EVP layer will begin enforcing the listed transitions.
|
||
|
|
|
||
|
|
=head1 RETURN VALUES
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_newctx() and OSSL_FUNC_mac_dupctx() should return the newly created
|
||
|
|
provider side mac context, or NULL on failure.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_init(), OSSL_FUNC_mac_update(), OSSL_FUNC_mac_final(), OSSL_FUNC_mac_get_params(),
|
||
|
|
OSSL_FUNC_mac_get_ctx_params() and OSSL_FUNC_mac_set_ctx_params() should return 1 for
|
||
|
|
success or 0 on error.
|
||
|
|
|
||
|
|
OSSL_FUNC_mac_gettable_params(), OSSL_FUNC_mac_gettable_ctx_params() and
|
||
|
|
OSSL_FUNC_mac_settable_ctx_params() should return a constant L<OSSL_PARAM(3)>
|
||
|
|
array, or NULL if none is offered.
|
||
|
|
|
||
|
|
=head1 SEE ALSO
|
||
|
|
|
||
|
|
L<provider(7)>,
|
||
|
|
L<EVP_MAC-BLAKE2(7)>, L<EVP_MAC-CMAC(7)>, L<EVP_MAC-GMAC(7)>,
|
||
|
|
L<EVP_MAC-HMAC(7)>, L<EVP_MAC-KMAC(7)>, L<EVP_MAC-Poly1305(7)>,
|
||
|
|
L<EVP_MAC-Siphash(7)>,
|
||
|
|
L<life_cycle-mac(7)>, L<EVP_MAC(3)>
|
||
|
|
|
||
|
|
=head1 HISTORY
|
||
|
|
|
||
|
|
The provider MAC interface was introduced in OpenSSL 3.0.
|
||
|
|
|
||
|
|
=head1 COPYRIGHT
|
||
|
|
|
||
|
|
Copyright 2019-2022 The OpenSSL Project Authors. All Rights Reserved.
|
||
|
|
|
||
|
|
Licensed under the Apache License 2.0 (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
|