openssl/crypto/property/property_query.c

/*
 * Copyright 2021 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 "internal/propertyerr.h"
#include "internal/property.h"
#include "property_local.h"

static int property_idx_cmp(const void *keyp, const void *compare)
{
    OSSL_PROPERTY_IDX key = *(const OSSL_PROPERTY_IDX *)keyp;
    const OSSL_PROPERTY_DEFINITION *defn =
            (const OSSL_PROPERTY_DEFINITION *)compare;

    return key - defn->name_idx;
}

const OSSL_PROPERTY_DEFINITION *
ossl_property_find_property(const OSSL_PROPERTY_LIST *list,
                            OSSL_LIB_CTX *libctx, const char *name)
{
    OSSL_PROPERTY_IDX name_idx;

    if (list == NULL || name == NULL
        || (name_idx = ossl_property_name(libctx, name, 0)) == 0)
        return NULL;

    return ossl_bsearch(&name_idx, list->properties, list->num_properties,
                        sizeof(*list->properties), &property_idx_cmp, 0);
}

OSSL_PROPERTY_TYPE ossl_property_get_type(const OSSL_PROPERTY_DEFINITION *prop)
{
    return prop->type;
}

const char *ossl_property_get_string_value(OSSL_LIB_CTX *libctx,
                                           const OSSL_PROPERTY_DEFINITION *prop)
{
    const char *value = NULL;

    if (prop != NULL && prop->type == OSSL_PROPERTY_TYPE_STRING)
        value = ossl_property_value_str(libctx, prop->v.str_val);
    return value;
}

int64_t ossl_property_get_number_value(const OSSL_PROPERTY_DEFINITION *prop)
{
    int64_t value = 0;

    if (prop != NULL && prop->type == OSSL_PROPERTY_TYPE_NUMBER)
        value = prop->v.int_val;
    return value;
}

/* Does a property query have any optional clauses */
int ossl_property_has_optional(const OSSL_PROPERTY_LIST *query)
{
    return query->has_optional ? 1 : 0;
}

int ossl_property_is_enabled(OSSL_LIB_CTX *ctx,  const char *property_name,
                             const OSSL_PROPERTY_LIST *prop_list)
{
    const OSSL_PROPERTY_DEFINITION *prop;

    prop = ossl_property_find_property(prop_list, ctx, property_name);
    /* Do a separate check for override as it does not set type */
    if (prop == NULL || prop->optional || prop->oper == OSSL_PROPERTY_OVERRIDE)
        return 0;
    return (prop->type == OSSL_PROPERTY_TYPE_STRING
            && ((prop->oper == OSSL_PROPERTY_OPER_EQ
                     && prop->v.str_val == OSSL_PROPERTY_TRUE)
                 || (prop->oper == OSSL_PROPERTY_OPER_NE
                     && prop->v.str_val != OSSL_PROPERTY_TRUE)));
}