openssl/providers/default/defltprov.c
Richard Levitte a39eb84006 Replumbing: give the possibility for the provider to create a context
OSSL_provider_init() gets another output parameter, holding a pointer
to a provider side context.  It's entirely up to the provider to
define the context and what it's being used for.  This pointer is
passed back to other provider functions, typically the provider global
get_params and set_params functions, and also the diverse algorithm
context creators, and of course, the teardown function.

With this, a provider can be instantiated more than once, or be
re-loaded as the case may be, while maintaining instance state.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8848)
2019-04-30 15:34:23 +02:00

129 lines
4.5 KiB
C

/*
* Copyright 2019 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
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include <stdio.h>
#include <openssl/core.h>
#include <openssl/core_numbers.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include "internal/provider_algs.h"
/* Functions provided by the core */
static OSSL_core_get_param_types_fn *c_get_param_types = NULL;
static OSSL_core_get_params_fn *c_get_params = NULL;
/* Parameters we provide to the core */
static const OSSL_ITEM deflt_param_types[] = {
{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_NAME },
{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_VERSION },
{ OSSL_PARAM_UTF8_PTR, OSSL_PROV_PARAM_BUILDINFO },
{ 0, NULL }
};
static const OSSL_ITEM *deflt_get_param_types(const OSSL_PROVIDER *prov)
{
return deflt_param_types;
}
static int deflt_get_params(const OSSL_PROVIDER *prov,
const OSSL_PARAM params[])
{
const OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_NAME);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, "OpenSSL Default Provider"))
return 0;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_VERSION);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_VERSION_STR))
return 0;
p = OSSL_PARAM_locate(params, OSSL_PROV_PARAM_BUILDINFO);
if (p != NULL && !OSSL_PARAM_set_utf8_ptr(p, OPENSSL_FULL_VERSION_STR))
return 0;
return 1;
}
static const OSSL_ALGORITHM deflt_digests[] = {
{ "SHA256", "default=yes", sha256_functions },
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM deflt_ciphers[] = {
{ "AES-256-ECB", "default=yes", aes256ecb_functions },
{ "AES-192-ECB", "default=yes", aes192ecb_functions },
{ "AES-128-ECB", "default=yes", aes128ecb_functions },
{ "AES-256-CBC", "default=yes", aes256cbc_functions },
{ "AES-192-CBC", "default=yes", aes192cbc_functions },
{ "AES-128-CBC", "default=yes", aes128cbc_functions },
{ "AES-256-OFB", "default=yes", aes256ofb_functions },
{ "AES-192-OFB", "default=yes", aes192ofb_functions },
{ "AES-128-OFB", "default=yes", aes128ofb_functions },
{ "AES-256-CFB", "default=yes", aes256cfb_functions },
{ "AES-192-CFB", "default=yes", aes192cfb_functions },
{ "AES-128-CFB", "default=yes", aes128cfb_functions },
{ "AES-256-CFB1", "default=yes", aes256cfb1_functions },
{ "AES-192-CFB1", "default=yes", aes192cfb1_functions },
{ "AES-128-CFB1", "default=yes", aes128cfb1_functions },
{ "AES-256-CFB8", "default=yes", aes256cfb8_functions },
{ "AES-192-CFB8", "default=yes", aes192cfb8_functions },
{ "AES-128-CFB8", "default=yes", aes128cfb8_functions },
{ "AES-256-CTR", "default=yes", aes256ctr_functions },
{ "AES-192-CTR", "default=yes", aes192ctr_functions },
{ "AES-128-CTR", "default=yes", aes128ctr_functions },
{ NULL, NULL, NULL }
};
static const OSSL_ALGORITHM *deflt_query(OSSL_PROVIDER *prov,
int operation_id,
int *no_cache)
{
*no_cache = 0;
switch (operation_id) {
case OSSL_OP_DIGEST:
return deflt_digests;
case OSSL_OP_CIPHER:
return deflt_ciphers;
}
return NULL;
}
/* Functions we provide to the core */
static const OSSL_DISPATCH deflt_dispatch_table[] = {
{ OSSL_FUNC_PROVIDER_GET_PARAM_TYPES, (void (*)(void))deflt_get_param_types },
{ OSSL_FUNC_PROVIDER_GET_PARAMS, (void (*)(void))deflt_get_params },
{ OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))deflt_query },
{ 0, NULL }
};
OSSL_provider_init_fn ossl_default_provider_init;
int ossl_default_provider_init(const OSSL_PROVIDER *provider,
const OSSL_DISPATCH *in,
const OSSL_DISPATCH **out,
void **provctx)
{
for (; in->function_id != 0; in++) {
switch (in->function_id) {
case OSSL_FUNC_CORE_GET_PARAM_TYPES:
c_get_param_types = OSSL_get_core_get_param_types(in);
break;
case OSSL_FUNC_CORE_GET_PARAMS:
c_get_params = OSSL_get_core_get_params(in);
break;
default:
/* Just ignore anything we don't understand */
break;
}
}
*out = deflt_dispatch_table;
return 1;
}