[thirdparty/openssl.git] / crypto / store / store_meth.c

/*
 * Copyright 2020 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 <openssl/store.h>
#include <openssl/crypto.h>
#include "internal/core.h"
#include "internal/namemap.h"
#include "internal/property.h"
#include "internal/provider.h"
#include "store_local.h"

int OSSL_STORE_LOADER_up_ref(OSSL_STORE_LOADER *loader)
{
    int ref = 0;

    if (loader->prov != NULL)
        CRYPTO_UP_REF(&loader->refcnt, &ref, loader->lock);
    return 1;
}

void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *loader)
{
    if (loader != NULL && loader->prov != NULL) {
        int i;

        CRYPTO_DOWN_REF(&loader->refcnt, &i, loader->lock);
        if (i > 0)
            return;
        ossl_provider_free(loader->prov);
        CRYPTO_THREAD_lock_free(loader->lock);
    }
    OPENSSL_free(loader);
}

/*
 * OSSL_STORE_LOADER_new() expects the scheme as a constant string,
 * which we currently don't have, so we need an alternative allocator.
 */
static OSSL_STORE_LOADER *new_loader(OSSL_PROVIDER *prov)
{
    OSSL_STORE_LOADER *loader;

    if ((loader = OPENSSL_zalloc(sizeof(*loader))) == NULL
        || (loader->lock = CRYPTO_THREAD_lock_new()) == NULL) {
        OPENSSL_free(loader);
        return NULL;
    }
    loader->prov = prov;
    ossl_provider_up_ref(prov);
    loader->refcnt = 1;

    return loader;
}

static int up_ref_loader(void *method)
{
    return OSSL_STORE_LOADER_up_ref(method);
}

static void free_loader(void *method)
{
    OSSL_STORE_LOADER_free(method);
}

/* Permanent loader method store, constructor and destructor */
static void loader_store_free(void *vstore)
{
    ossl_method_store_free(vstore);
}

static void *loader_store_new(OSSL_LIB_CTX *ctx)
{
    return ossl_method_store_new(ctx);
}


static const OSSL_LIB_CTX_METHOD loader_store_method = {
    loader_store_new,
    loader_store_free,
};

/* Data to be passed through ossl_method_construct() */
struct loader_data_st {
    OSSL_LIB_CTX *libctx;
    OSSL_METHOD_CONSTRUCT_METHOD *mcm;
    int scheme_id;               /* For get_loader_from_store() */
    const char *scheme;          /* For get_loader_from_store() */
    const char *propquery;       /* For get_loader_from_store() */
};

/*
 * Generic routines to fetch / create OSSL_STORE methods with
 * ossl_method_construct()
 */

/* Temporary loader method store, constructor and destructor */
static void *alloc_tmp_loader_store(OSSL_LIB_CTX *ctx)
{
    return ossl_method_store_new(ctx);
}

 static void dealloc_tmp_loader_store(void *store)
{
    if (store != NULL)
        ossl_method_store_free(store);
}

/* Get the permanent loader store */
static OSSL_METHOD_STORE *get_loader_store(OSSL_LIB_CTX *libctx)
{
    return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_STORE_LOADER_STORE_INDEX,
                                &loader_store_method);
}

/* Get loader methods from a store, or put one in */
static void *get_loader_from_store(OSSL_LIB_CTX *libctx, void *store,
                                   void *data)
{
    struct loader_data_st *methdata = data;
    void *method = NULL;
    int id;

    if ((id = methdata->scheme_id) == 0) {
        OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);

        id = ossl_namemap_name2num(namemap, methdata->scheme);
    }

    if (store == NULL
        && (store = get_loader_store(libctx)) == NULL)
        return NULL;

    if (!ossl_method_store_fetch(store, id, methdata->propquery, &method))
        return NULL;
    return method;
}

static int put_loader_in_store(OSSL_LIB_CTX *libctx, void *store,
                               void *method, const OSSL_PROVIDER *prov,
                               int operation_id, const char *scheme,
                               const char *propdef, void *unused)
{
    OSSL_NAMEMAP *namemap;
    int id;

    if ((namemap = ossl_namemap_stored(libctx)) == NULL
        || (id = ossl_namemap_name2num(namemap, scheme)) == 0)
        return 0;

    if (store == NULL && (store = get_loader_store(libctx)) == NULL)
        return 0;

    return ossl_method_store_add(store, prov, id, propdef, method,
                                 up_ref_loader, free_loader);
}

static void *loader_from_dispatch(int scheme_id, const OSSL_ALGORITHM *algodef,
                                  OSSL_PROVIDER *prov)
{
    OSSL_STORE_LOADER *loader = NULL;
    const OSSL_DISPATCH *fns = algodef->implementation;

    if ((loader = new_loader(prov)) == NULL)
        return NULL;
    loader->scheme_id = scheme_id;
    loader->propdef = algodef->property_definition;

    for (; fns->function_id != 0; fns++) {
        switch (fns->function_id) {
        case OSSL_FUNC_STORE_OPEN:
            if (loader->p_open == NULL)
                loader->p_open = OSSL_FUNC_store_open(fns);
            break;
        case OSSL_FUNC_STORE_ATTACH:
            if (loader->p_attach == NULL)
                loader->p_attach = OSSL_FUNC_store_attach(fns);
            break;
        case OSSL_FUNC_STORE_SETTABLE_CTX_PARAMS:
            if (loader->p_settable_ctx_params == NULL)
                loader->p_settable_ctx_params =
                    OSSL_FUNC_store_settable_ctx_params(fns);
            break;
        case OSSL_FUNC_STORE_SET_CTX_PARAMS:
            if (loader->p_set_ctx_params == NULL)
                loader->p_set_ctx_params = OSSL_FUNC_store_set_ctx_params(fns);
            break;
        case OSSL_FUNC_STORE_LOAD:
            if (loader->p_load == NULL)
                loader->p_load = OSSL_FUNC_store_load(fns);
            break;
        case OSSL_FUNC_STORE_EOF:
            if (loader->p_eof == NULL)
                loader->p_eof = OSSL_FUNC_store_eof(fns);
            break;
        case OSSL_FUNC_STORE_CLOSE:
            if (loader->p_close == NULL)
                loader->p_close = OSSL_FUNC_store_close(fns);
            break;
        case OSSL_FUNC_STORE_EXPORT_OBJECT:
            if (loader->p_export_object == NULL)
                loader->p_export_object = OSSL_FUNC_store_export_object(fns);
            break;
        }
    }

    if ((loader->p_open == NULL && loader->p_attach == NULL)
        || loader->p_load == NULL
        || loader->p_eof == NULL
        || loader->p_close == NULL) {
        /* Only set_ctx_params is optionaal */
        OSSL_STORE_LOADER_free(loader);
        ERR_raise(ERR_LIB_OSSL_STORE, OSSL_STORE_R_LOADER_INCOMPLETE);
        return NULL;
    }
    return loader;
}

/*
 * The core fetching functionality passes the scheme of the implementation.
 * This function is responsible to getting an identity number for them,
 * then call loader_from_dispatch() with that identity number.
 */
static void *construct_loader(const OSSL_ALGORITHM *algodef,
                              OSSL_PROVIDER *prov, void *unused)
{
    /*
     * This function is only called if get_loader_from_store() returned
     * NULL, so it's safe to say that of all the spots to create a new
     * namemap entry, this is it.  Should the scheme already exist there, we
     * know that ossl_namemap_add() will return its corresponding number.
     */
    OSSL_LIB_CTX *libctx = ossl_provider_library_context(prov);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
    const char *scheme = algodef->algorithm_names;
    int id = ossl_namemap_add_name(namemap, 0, scheme);
    void *method = NULL;

    if (id != 0)
        method = loader_from_dispatch(id, algodef, prov);

    return method;
}

/* Intermediary function to avoid ugly casts, used below */
static void destruct_loader(void *method, void *data)
{
    OSSL_STORE_LOADER_free(method);
}

/* Fetching support.  Can fetch by numeric identity or by scheme */
static OSSL_STORE_LOADER *inner_loader_fetch(OSSL_LIB_CTX *libctx,
                                             int id, const char *scheme,
                                             const char *properties)
{
    OSSL_METHOD_STORE *store = get_loader_store(libctx);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
    void *method = NULL;

    if (store == NULL || namemap == NULL)
        return NULL;

    /*
     * If we have been passed neither a scheme_id or a scheme, we have an
     * internal programming error.
     */
    if (!ossl_assert(id != 0 || scheme != NULL))
        return NULL;

    if (id == 0)
        id = ossl_namemap_name2num(namemap, scheme);

    if (id == 0
        || !ossl_method_store_cache_get(store, id, properties, &method)) {
        OSSL_METHOD_CONSTRUCT_METHOD mcm = {
            alloc_tmp_loader_store,
            dealloc_tmp_loader_store,
            get_loader_from_store,
            put_loader_in_store,
            construct_loader,
            destruct_loader
        };
        struct loader_data_st mcmdata;

        mcmdata.libctx = libctx;
        mcmdata.mcm = &mcm;
        mcmdata.scheme_id = id;
        mcmdata.scheme = scheme;
        mcmdata.propquery = properties;
        if ((method = ossl_method_construct(libctx, OSSL_OP_STORE,
                                            0 /* !force_cache */,
                                            &mcm, &mcmdata)) != NULL) {
            /*
             * If construction did create a method for us, we know that there
             * is a correct scheme_id, since those have already been calculated
             * in get_loader_from_store() and put_loader_in_store() above.
             */
            if (id == 0)
                id = ossl_namemap_name2num(namemap, scheme);
            ossl_method_store_cache_set(store, id, properties, method,
                                        up_ref_loader, free_loader);
        }
    }

    return method;
}

OSSL_STORE_LOADER *OSSL_STORE_LOADER_fetch(const char *scheme,
                                           OSSL_LIB_CTX *libctx,
                                           const char *properties)
{
    return inner_loader_fetch(libctx, 0, scheme, properties);
}

OSSL_STORE_LOADER *ossl_store_loader_fetch_by_number(OSSL_LIB_CTX *libctx,
                                                     int scheme_id,
                                                     const char *properties)
{
    return inner_loader_fetch(libctx, scheme_id, NULL, properties);
}

/*
 * Library of basic method functions
 */

const OSSL_PROVIDER *OSSL_STORE_LOADER_provider(const OSSL_STORE_LOADER *loader)
{
    if (!ossl_assert(loader != NULL)) {
        ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }

    return loader->prov;
}

const char *OSSL_STORE_LOADER_properties(const OSSL_STORE_LOADER *loader)
{
    if (!ossl_assert(loader != NULL)) {
        ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }

    return loader->propdef;
}

int OSSL_STORE_LOADER_number(const OSSL_STORE_LOADER *loader)
{
    if (!ossl_assert(loader != NULL)) {
        ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }

    return loader->scheme_id;
}

int OSSL_STORE_LOADER_is_a(const OSSL_STORE_LOADER *loader, const char *name)
{
    if (loader->prov != NULL) {
        OSSL_LIB_CTX *libctx = ossl_provider_library_context(loader->prov);
        OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);

        return ossl_namemap_name2num(namemap, name) == loader->scheme_id;
    }
    return 0;
}

struct loader_do_all_data_st {
    void (*user_fn)(void *method, void *arg);
    void *user_arg;
};

static void loader_do_one(OSSL_PROVIDER *provider,
                          const OSSL_ALGORITHM *algodef,
                          int no_store, void *vdata)
{
    struct loader_do_all_data_st *data = vdata;
    OSSL_LIB_CTX *libctx = ossl_provider_library_context(provider);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
    const char *name = algodef->algorithm_names;
    int id = ossl_namemap_add_name(namemap, 0, name);
    void *method = NULL;

    if (id != 0)
        method =
            loader_from_dispatch(id, algodef, provider);

    if (method != NULL) {
        data->user_fn(method, data->user_arg);
        OSSL_STORE_LOADER_free(method);
    }
}

void OSSL_STORE_LOADER_do_all_provided(OSSL_LIB_CTX *libctx,
                                       void (*fn)(OSSL_STORE_LOADER *loader,
                                                  void *arg),
                                       void *arg)
{
    struct loader_do_all_data_st data;

    data.user_fn = (void (*)(void *, void *))fn;
    data.user_arg = arg;
    ossl_algorithm_do_all(libctx, OSSL_OP_STORE, NULL,
                          NULL, loader_do_one, NULL,
                          &data);
}

void OSSL_STORE_LOADER_names_do_all(const OSSL_STORE_LOADER *loader,
                                    void (*fn)(const char *name, void *data),
                                    void *data)
{
    if (loader == NULL)
        return;

    if (loader->prov != NULL) {
        OSSL_LIB_CTX *libctx = ossl_provider_library_context(loader->prov);
        OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);

        ossl_namemap_doall_names(namemap, loader->scheme_id, fn, data);
    }
}
Commit	Line	Data
c4fc564d RL	1	/*
	2	* Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
	3	*
	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
	10	#include <openssl/store.h>
	11	#include <openssl/crypto.h>
	12	#include "internal/core.h"
	13	#include "internal/namemap.h"
	14	#include "internal/property.h"
	15	#include "internal/provider.h"
	16	#include "store_local.h"
	17
	18	int OSSL_STORE_LOADER_up_ref(OSSL_STORE_LOADER *loader)
	19	{
	20	int ref = 0;
	21
	22	if (loader->prov != NULL)
	23	CRYPTO_UP_REF(&loader->refcnt, &ref, loader->lock);
	24	return 1;
	25	}
	26
	27	void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *loader)
	28	{
	29	if (loader != NULL && loader->prov != NULL) {
	30	int i;
	31
	32	CRYPTO_DOWN_REF(&loader->refcnt, &i, loader->lock);
	33	if (i > 0)
	34	return;
	35	ossl_provider_free(loader->prov);
	36	CRYPTO_THREAD_lock_free(loader->lock);
	37	}
	38	OPENSSL_free(loader);
	39	}
	40
	41	/*
	42	* OSSL_STORE_LOADER_new() expects the scheme as a constant string,
	43	* which we currently don't have, so we need an alternative allocator.
	44	*/
	45	static OSSL_STORE_LOADER new_loader(OSSL_PROVIDER prov)
	46	{
	47	OSSL_STORE_LOADER *loader;
	48
	49	if ((loader = OPENSSL_zalloc(sizeof(*loader))) == NULL
	50	\|\| (loader->lock = CRYPTO_THREAD_lock_new()) == NULL) {
	51	OPENSSL_free(loader);
	52	return NULL;
	53	}
	54	loader->prov = prov;
	55	ossl_provider_up_ref(prov);
	56	loader->refcnt = 1;
	57
	58	return loader;
	59	}
	60
	61	static int up_ref_loader(void *method)
	62	{
	63	return OSSL_STORE_LOADER_up_ref(method);
	64	}
65
66	static void free_loader(void *method)
67	{
68	OSSL_STORE_LOADER_free(method);
69	}
70
71	/* Permanent loader method store, constructor and destructor */
72	static void loader_store_free(void *vstore)
73	{
74	ossl_method_store_free(vstore);
75	}
76
b4250010	77	static void loader_store_new(OSSL_LIB_CTX ctx)
c4fc564d RL	78	{
	79	return ossl_method_store_new(ctx);
	80	}
	81
	82
b4250010	83	static const OSSL_LIB_CTX_METHOD loader_store_method = {
c4fc564d RL	84	loader_store_new,
	85	loader_store_free,
	86	};
	87
	88	/* Data to be passed through ossl_method_construct() */
	89	struct loader_data_st {
b4250010	90	OSSL_LIB_CTX *libctx;
c4fc564d RL	91	OSSL_METHOD_CONSTRUCT_METHOD *mcm;
	92	int scheme_id; /* For get_loader_from_store() */
	93	const char scheme; / For get_loader_from_store() */
	94	const char propquery; / For get_loader_from_store() */
	95	};
	96
	97	/*
	98	* Generic routines to fetch / create OSSL_STORE methods with
	99	* ossl_method_construct()
	100	*/
	101
	102	/* Temporary loader method store, constructor and destructor */
b4250010	103	static void alloc_tmp_loader_store(OSSL_LIB_CTX ctx)
c4fc564d RL	104	{
	105	return ossl_method_store_new(ctx);
	106	}
	107
	108	static void dealloc_tmp_loader_store(void *store)
	109	{
	110	if (store != NULL)
	111	ossl_method_store_free(store);
	112	}
	113
	114	/* Get the permanent loader store */
b4250010	115	static OSSL_METHOD_STORE get_loader_store(OSSL_LIB_CTX libctx)
c4fc564d	116	{
b4250010	117	return ossl_lib_ctx_get_data(libctx, OSSL_LIB_CTX_STORE_LOADER_STORE_INDEX,
c4fc564d RL	118	&loader_store_method);
	119	}
	120
	121	/* Get loader methods from a store, or put one in */
b4250010	122	static void get_loader_from_store(OSSL_LIB_CTX libctx, void *store,
c4fc564d RL	123	void *data)
	124	{
	125	struct loader_data_st *methdata = data;
	126	void *method = NULL;
	127	int id;
	128
	129	if ((id = methdata->scheme_id) == 0) {
	130	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	131
	132	id = ossl_namemap_name2num(namemap, methdata->scheme);
	133	}
	134
	135	if (store == NULL
	136	&& (store = get_loader_store(libctx)) == NULL)
	137	return NULL;
	138
	139	if (!ossl_method_store_fetch(store, id, methdata->propquery, &method))
	140	return NULL;
	141	return method;
	142	}
	143
b4250010	144	static int put_loader_in_store(OSSL_LIB_CTX libctx, void store,
c4fc564d RL	145	void method, const OSSL_PROVIDER prov,
	146	int operation_id, const char *scheme,
	147	const char propdef, void unused)
	148	{
	149	OSSL_NAMEMAP *namemap;
	150	int id;
	151
	152	if ((namemap = ossl_namemap_stored(libctx)) == NULL
	153	\|\| (id = ossl_namemap_name2num(namemap, scheme)) == 0)
	154	return 0;
	155
	156	if (store == NULL && (store = get_loader_store(libctx)) == NULL)
	157	return 0;
	158
	159	return ossl_method_store_add(store, prov, id, propdef, method,
	160	up_ref_loader, free_loader);
	161	}
	162
	163	static void loader_from_dispatch(int scheme_id, const OSSL_ALGORITHM algodef,
	164	OSSL_PROVIDER *prov)
	165	{
	166	OSSL_STORE_LOADER *loader = NULL;
	167	const OSSL_DISPATCH *fns = algodef->implementation;
	168
	169	if ((loader = new_loader(prov)) == NULL)
	170	return NULL;
	171	loader->scheme_id = scheme_id;
	172	loader->propdef = algodef->property_definition;
	173
	174	for (; fns->function_id != 0; fns++) {
	175	switch (fns->function_id) {
	176	case OSSL_FUNC_STORE_OPEN:
	177	if (loader->p_open == NULL)
	178	loader->p_open = OSSL_FUNC_store_open(fns);
	179	break;
	180	case OSSL_FUNC_STORE_ATTACH:
	181	if (loader->p_attach == NULL)
	182	loader->p_attach = OSSL_FUNC_store_attach(fns);
	183	break;
	184	case OSSL_FUNC_STORE_SETTABLE_CTX_PARAMS:
	185	if (loader->p_settable_ctx_params == NULL)
	186	loader->p_settable_ctx_params =
	187	OSSL_FUNC_store_settable_ctx_params(fns);
	188	break;
	189	case OSSL_FUNC_STORE_SET_CTX_PARAMS:
	190	if (loader->p_set_ctx_params == NULL)
	191	loader->p_set_ctx_params = OSSL_FUNC_store_set_ctx_params(fns);
	192	break;
	193	case OSSL_FUNC_STORE_LOAD:
	194	if (loader->p_load == NULL)
	195	loader->p_load = OSSL_FUNC_store_load(fns);
	196	break;
	197	case OSSL_FUNC_STORE_EOF:
	198	if (loader->p_eof == NULL)
	199	loader->p_eof = OSSL_FUNC_store_eof(fns);
	200	break;
	201	case OSSL_FUNC_STORE_CLOSE:
	202	if (loader->p_close == NULL)
	203	loader->p_close = OSSL_FUNC_store_close(fns);
	204	break;
	205	case OSSL_FUNC_STORE_EXPORT_OBJECT:
	206	if (loader->p_export_object == NULL)
	207	loader->p_export_object = OSSL_FUNC_store_export_object(fns);
	208	break;
209	}
210	}
211
212	if ((loader->p_open == NULL && loader->p_attach == NULL)
213	\|\| loader->p_load == NULL
214	\|\| loader->p_eof == NULL
215	\|\| loader->p_close == NULL) {
216	/* Only set_ctx_params is optionaal */
217	OSSL_STORE_LOADER_free(loader);
218	ERR_raise(ERR_LIB_OSSL_STORE, OSSL_STORE_R_LOADER_INCOMPLETE);
219	return NULL;
220	}
221	return loader;
222	}
223
224	/*
225	* The core fetching functionality passes the scheme of the implementation.
226	* This function is responsible to getting an identity number for them,
227	* then call loader_from_dispatch() with that identity number.
228	*/
229	static void construct_loader(const OSSL_ALGORITHM algodef,
230	OSSL_PROVIDER prov, void unused)
231	{
232	/*
233	* This function is only called if get_loader_from_store() returned
234	* NULL, so it's safe to say that of all the spots to create a new
235	* namemap entry, this is it. Should the scheme already exist there, we
236	* know that ossl_namemap_add() will return its corresponding number.
237	*/
b4250010	238	OSSL_LIB_CTX *libctx = ossl_provider_library_context(prov);
c4fc564d RL	239	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	240	const char *scheme = algodef->algorithm_names;
	241	int id = ossl_namemap_add_name(namemap, 0, scheme);
	242	void *method = NULL;
	243
	244	if (id != 0)
	245	method = loader_from_dispatch(id, algodef, prov);
	246
	247	return method;
	248	}
	249
	250	/* Intermediary function to avoid ugly casts, used below */
	251	static void destruct_loader(void method, void data)
	252	{
	253	OSSL_STORE_LOADER_free(method);
	254	}
	255
	256	/* Fetching support. Can fetch by numeric identity or by scheme */
b4250010	257	static OSSL_STORE_LOADER inner_loader_fetch(OSSL_LIB_CTX libctx,
c4fc564d RL	258	int id, const char *scheme,
	259	const char *properties)
	260	{
	261	OSSL_METHOD_STORE *store = get_loader_store(libctx);
	262	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	263	void *method = NULL;
	264
	265	if (store == NULL \|\| namemap == NULL)
	266	return NULL;
	267
	268	/*
	269	* If we have been passed neither a scheme_id or a scheme, we have an
	270	* internal programming error.
	271	*/
	272	if (!ossl_assert(id != 0 \|\| scheme != NULL))
	273	return NULL;
	274
	275	if (id == 0)
	276	id = ossl_namemap_name2num(namemap, scheme);
	277
	278	if (id == 0
	279	\|\| !ossl_method_store_cache_get(store, id, properties, &method)) {
	280	OSSL_METHOD_CONSTRUCT_METHOD mcm = {
	281	alloc_tmp_loader_store,
	282	dealloc_tmp_loader_store,
	283	get_loader_from_store,
	284	put_loader_in_store,
	285	construct_loader,
	286	destruct_loader
	287	};
	288	struct loader_data_st mcmdata;
	289
	290	mcmdata.libctx = libctx;
	291	mcmdata.mcm = &mcm;
	292	mcmdata.scheme_id = id;
	293	mcmdata.scheme = scheme;
	294	mcmdata.propquery = properties;
	295	if ((method = ossl_method_construct(libctx, OSSL_OP_STORE,
	296	0 /* !force_cache */,
	297	&mcm, &mcmdata)) != NULL) {
	298	/*
	299	* If construction did create a method for us, we know that there
	300	* is a correct scheme_id, since those have already been calculated
	301	* in get_loader_from_store() and put_loader_in_store() above.
	302	*/
	303	if (id == 0)
	304	id = ossl_namemap_name2num(namemap, scheme);
	305	ossl_method_store_cache_set(store, id, properties, method,
	306	up_ref_loader, free_loader);
	307	}
	308	}
	309
	310	return method;
	311	}
	312
	313	OSSL_STORE_LOADER OSSL_STORE_LOADER_fetch(const char scheme,
b4250010	314	OSSL_LIB_CTX *libctx,
c4fc564d RL	315	const char *properties)
	316	{
	317	return inner_loader_fetch(libctx, 0, scheme, properties);
	318	}
	319
b4250010	320	OSSL_STORE_LOADER ossl_store_loader_fetch_by_number(OSSL_LIB_CTX libctx,
c4fc564d RL	321	int scheme_id,
	322	const char *properties)
	323	{
	324	return inner_loader_fetch(libctx, scheme_id, NULL, properties);
	325	}
	326
	327	/*
	328	* Library of basic method functions
	329	*/
	330
	331	const OSSL_PROVIDER OSSL_STORE_LOADER_provider(const OSSL_STORE_LOADER loader)
	332	{
	333	if (!ossl_assert(loader != NULL)) {
	334	ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
	335	return 0;
	336	}
	337
	338	return loader->prov;
	339	}
	340
	341	const char OSSL_STORE_LOADER_properties(const OSSL_STORE_LOADER loader)
	342	{
	343	if (!ossl_assert(loader != NULL)) {
	344	ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
	345	return 0;
	346	}
	347
	348	return loader->propdef;
	349	}
	350
	351	int OSSL_STORE_LOADER_number(const OSSL_STORE_LOADER *loader)
	352	{
	353	if (!ossl_assert(loader != NULL)) {
	354	ERR_raise(ERR_LIB_OSSL_STORE, ERR_R_PASSED_NULL_PARAMETER);
	355	return 0;
	356	}
	357
	358	return loader->scheme_id;
	359	}
	360
	361	int OSSL_STORE_LOADER_is_a(const OSSL_STORE_LOADER loader, const char name)
	362	{
	363	if (loader->prov != NULL) {
b4250010	364	OSSL_LIB_CTX *libctx = ossl_provider_library_context(loader->prov);
c4fc564d RL	365	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	366
	367	return ossl_namemap_name2num(namemap, name) == loader->scheme_id;
	368	}
	369	return 0;
	370	}
	371
	372	struct loader_do_all_data_st {
	373	void (user_fn)(void method, void *arg);
	374	void *user_arg;
	375	};
	376
	377	static void loader_do_one(OSSL_PROVIDER *provider,
	378	const OSSL_ALGORITHM *algodef,
	379	int no_store, void *vdata)
	380	{
	381	struct loader_do_all_data_st *data = vdata;
b4250010	382	OSSL_LIB_CTX *libctx = ossl_provider_library_context(provider);
c4fc564d RL	383	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	384	const char *name = algodef->algorithm_names;
	385	int id = ossl_namemap_add_name(namemap, 0, name);
	386	void *method = NULL;
	387
	388	if (id != 0)
	389	method =
	390	loader_from_dispatch(id, algodef, provider);
	391
	392	if (method != NULL) {
	393	data->user_fn(method, data->user_arg);
	394	OSSL_STORE_LOADER_free(method);
	395	}
	396	}
	397
b4250010	398	void OSSL_STORE_LOADER_do_all_provided(OSSL_LIB_CTX *libctx,
c4fc564d RL	399	void (fn)(OSSL_STORE_LOADER loader,
	400	void *arg),
	401	void *arg)
	402	{
	403	struct loader_do_all_data_st data;
	404
	405	data.user_fn = (void ()(void , void *))fn;
	406	data.user_arg = arg;
	407	ossl_algorithm_do_all(libctx, OSSL_OP_STORE, NULL,
	408	NULL, loader_do_one, NULL,
	409	&data);
	410	}
	411
	412	void OSSL_STORE_LOADER_names_do_all(const OSSL_STORE_LOADER *loader,
	413	void (fn)(const char name, void *data),
	414	void *data)
	415	{
	416	if (loader == NULL)
	417	return;
	418
	419	if (loader->prov != NULL) {
b4250010	420	OSSL_LIB_CTX *libctx = ossl_provider_library_context(loader->prov);
c4fc564d RL	421	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	422
	423	ossl_namemap_doall_names(namemap, loader->scheme_id, fn, data);
	424	}
	425	}