mirror of https://github.com/openssl/openssl.git
135 lines
4.3 KiB
C
135 lines
4.3 KiB
C
/*
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* Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/core.h>
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#include <openssl/core_dispatch.h>
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#include "internal/core.h"
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#include "internal/property.h"
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#include "internal/provider.h"
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struct algorithm_data_st {
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OSSL_LIB_CTX *libctx;
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int operation_id; /* May be zero for finding them all */
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int (*pre)(OSSL_PROVIDER *, int operation_id, void *data, int *result);
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void (*fn)(OSSL_PROVIDER *, const OSSL_ALGORITHM *, int no_store,
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void *data);
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int (*post)(OSSL_PROVIDER *, int operation_id, int no_store, void *data,
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int *result);
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void *data;
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};
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static int algorithm_do_this(OSSL_PROVIDER *provider, void *cbdata)
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{
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struct algorithm_data_st *data = cbdata;
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int no_store = 0; /* Assume caching is ok */
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int first_operation = 1;
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int last_operation = OSSL_OP__HIGHEST;
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int cur_operation;
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int ok = 1;
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if (data->operation_id != 0)
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first_operation = last_operation = data->operation_id;
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for (cur_operation = first_operation;
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cur_operation <= last_operation;
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cur_operation++) {
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const OSSL_ALGORITHM *map = NULL;
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int ret;
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/* Do we fulfill pre-conditions? */
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if (data->pre == NULL) {
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/* If there is no pre-condition function, assume "yes" */
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ret = 1;
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} else {
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if (!data->pre(provider, cur_operation, data->data, &ret))
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/* Error, bail out! */
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return 0;
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}
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/* If pre-condition not fulfilled, go to the next operation */
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if (!ret)
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continue;
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map = ossl_provider_query_operation(provider, cur_operation,
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&no_store);
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if (map != NULL) {
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while (map->algorithm_names != NULL) {
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const OSSL_ALGORITHM *thismap = map++;
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data->fn(provider, thismap, no_store, data->data);
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}
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}
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ossl_provider_unquery_operation(provider, cur_operation, map);
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/* Do we fulfill post-conditions? */
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if (data->post == NULL) {
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/* If there is no post-condition function, assume "yes" */
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ret = 1;
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} else {
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if (!data->post(provider, cur_operation, no_store, data->data,
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&ret))
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/* Error, bail out! */
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return 0;
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}
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/* If post-condition not fulfilled, set general failure */
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if (!ret)
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ok = 0;
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}
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return ok;
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}
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void ossl_algorithm_do_all(OSSL_LIB_CTX *libctx, int operation_id,
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OSSL_PROVIDER *provider,
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int (*pre)(OSSL_PROVIDER *, int operation_id,
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void *data, int *result),
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void (*fn)(OSSL_PROVIDER *provider,
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const OSSL_ALGORITHM *algo,
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int no_store, void *data),
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int (*post)(OSSL_PROVIDER *, int operation_id,
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int no_store, void *data, int *result),
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void *data)
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{
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struct algorithm_data_st cbdata = { 0, };
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cbdata.libctx = libctx;
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cbdata.operation_id = operation_id;
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cbdata.pre = pre;
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cbdata.fn = fn;
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cbdata.post = post;
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cbdata.data = data;
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if (provider == NULL)
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ossl_provider_doall_activated(libctx, algorithm_do_this, &cbdata);
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else
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algorithm_do_this(provider, &cbdata);
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}
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char *ossl_algorithm_get1_first_name(const OSSL_ALGORITHM *algo)
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{
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const char *first_name_end = NULL;
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size_t first_name_len = 0;
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char *ret;
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if (algo->algorithm_names == NULL)
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return NULL;
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first_name_end = strchr(algo->algorithm_names, ':');
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if (first_name_end == NULL)
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first_name_len = strlen(algo->algorithm_names);
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else
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first_name_len = first_name_end - algo->algorithm_names;
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ret = OPENSSL_strndup(algo->algorithm_names, first_name_len);
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if (ret == NULL)
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ERR_raise(ERR_LIB_EVP, ERR_R_MALLOC_FAILURE);
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return ret;
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}
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