[thirdparty/openssl.git] / crypto / evp / evp_fetch.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 <stddef.h>
#include <openssl/ossl_typ.h>
#include <openssl/evp.h>
#include <openssl/core.h>
#include "internal/cryptlib.h"
#include "internal/thread_once.h"
#include "internal/property.h"
#include "internal/core.h"
#include "internal/provider.h"
#include "internal/namemap.h"
#include "internal/evp_int.h"    /* evp_locl.h needs it */
#include "evp_locl.h"

static void default_method_store_free(void *vstore)
{
    ossl_method_store_free(vstore);
}

static void *default_method_store_new(OPENSSL_CTX *ctx)
{
    return ossl_method_store_new(ctx);
}


static const OPENSSL_CTX_METHOD default_method_store_method = {
    default_method_store_new,
    default_method_store_free,
};

/* Data to be passed through ossl_method_construct() */
struct method_data_st {
    OPENSSL_CTX *libctx;
    OSSL_METHOD_CONSTRUCT_METHOD *mcm;
    int operation_id;            /* For get_method_from_store() */
    int name_id;                 /* For get_method_from_store() */
    const char *name;            /* For get_method_from_store() */
    const char *propquery;       /* For get_method_from_store() */
    void *(*method_from_dispatch)(int name_id, const OSSL_DISPATCH *,
                                  OSSL_PROVIDER *, void *);
    void *method_data;
    int (*refcnt_up_method)(void *method);
    void (*destruct_method)(void *method);
};

/*
 * Generic routines to fetch / create EVP methods with ossl_method_construct()
 */
static void *alloc_tmp_method_store(OPENSSL_CTX *ctx)
{
    return ossl_method_store_new(ctx);
}

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

static OSSL_METHOD_STORE *get_default_method_store(OPENSSL_CTX *libctx)
{
    return openssl_ctx_get_data(libctx, OPENSSL_CTX_DEFAULT_METHOD_STORE_INDEX,
                                &default_method_store_method);
}

/*
 * To identity the method in the method store, we mix the name identity
 * with the operation identity, with the assumption that we don't have
 * more than 2^24 names or more than 2^8 operation types.
 *
 * The resulting identity is a 32-bit integer, composed like this:
 *
 * +---------24 bits--------+-8 bits-+
 * |      name identity     | op id  |
 * +------------------------+--------+
 */
static uint32_t method_id(unsigned int operation_id, int name_id)
{
    if (!ossl_assert(name_id < (1 << 24) || operation_id < (1 << 8))
        || !ossl_assert(name_id > 0 && operation_id > 0))
        return 0;
    return ((name_id << 8) & 0xFFFFFF00) | (operation_id & 0x000000FF);
}

static void *get_method_from_store(OPENSSL_CTX *libctx, void *store,
                                   void *data)
{
    struct method_data_st *methdata = data;
    void *method = NULL;
    int name_id;
    uint32_t meth_id;

    /*
     * get_method_from_store() is only called to try and get the method
     * that evp_generic_fetch() is asking for, and the operation id as
     * well as the name or name id are passed via methdata.
     */
    if ((name_id = methdata->name_id) == 0) {
        OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);

        if (namemap == 0)
            return NULL;
        name_id = ossl_namemap_name2num(namemap, methdata->name);
    }

    if (name_id == 0
        || (meth_id = method_id(methdata->operation_id, name_id)) == 0)
        return NULL;

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

    (void)ossl_method_store_fetch(store, meth_id, methdata->propquery,
                                  &method);

    if (method != NULL
        && !methdata->refcnt_up_method(method)) {
        method = NULL;
    }
    return method;
}

static int put_method_in_store(OPENSSL_CTX *libctx, void *store,
                               void *method, const OSSL_PROVIDER *prov,
                               int operation_id, const char *name,
                               const char *propdef, void *data)
{
    struct method_data_st *methdata = data;
    OSSL_NAMEMAP *namemap;
    int name_id;
    uint32_t meth_id;

    /*
     * put_method_in_store() is only called with a method that was
     * successfully created by construct_method() below, which means
     * the name should already be stored in the namemap, so just use it.
     */
    if ((namemap = ossl_namemap_stored(libctx)) == NULL
        || (name_id = ossl_namemap_name2num(namemap, name)) == 0
        || (meth_id = method_id(operation_id, name_id)) == 0)
        return 0;

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

    return ossl_method_store_add(store, prov, meth_id, propdef, method,
                                 methdata->refcnt_up_method,
                                 methdata->destruct_method);
}

/*
 * The core fetching functionality passes the name of the implementation.
 * This function is responsible to getting an identity number for it.
 */
static void *construct_method(const char *name, const OSSL_DISPATCH *fns,
                              OSSL_PROVIDER *prov, void *data)
{
    /*
     * This function is only called if get_method_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 name already exist there, we
     * know that ossl_namemap_add() will return its corresponding number.
     *
     * TODO(3.0): If this function gets an array of names instead of just
     * one, we need to check through all the names to see if at least one
     * of them has an associated number, and use that.  If several names
     * have associated numbers that differ from each other, it's an error.
     */
    struct method_data_st *methdata = data;
    OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
    int name_id = ossl_namemap_add(namemap, 0, name);

    return methdata->method_from_dispatch(name_id, fns, prov,
                                          methdata->method_data);
}

static void destruct_method(void *method, void *data)
{
    struct method_data_st *methdata = data;

    methdata->destruct_method(method);
}

static void *inner_generic_fetch(OPENSSL_CTX *libctx, int operation_id,
                                 int name_id, const char *name,
                                 const char *properties,
                                 void *(*new_method)(int name_id,
                                                     const OSSL_DISPATCH *fns,
                                                     OSSL_PROVIDER *prov,
                                                     void *method_data),
                                 void *method_data,
                                 int (*up_ref_method)(void *),
                                 void (*free_method)(void *))
{
    OSSL_METHOD_STORE *store = get_default_method_store(libctx);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
    uint32_t meth_id = 0;
    void *method = NULL;

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

    /*
     * If there's ever an operation_id == 0 passed, we have an internal
     * programming error.
     */
    if (!ossl_assert(operation_id > 0))
        return NULL;

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

    /* If we haven't received a name id yet, try to get one for the name */
    if (name_id == 0)
        name_id = ossl_namemap_name2num(namemap, name);

    /*
     * If we have a name id, calculate a method id with method_id().
     *
     * method_id returns 0 if we have too many operations (more than
     * about 2^8) or too many names (more than about 2^24).  In that
     * case, we can't create any new method.
     */
    if (name_id != 0 && (meth_id = method_id(operation_id, name_id)) == 0)
        return NULL;

    if (meth_id == 0
        || !ossl_method_store_cache_get(store, meth_id, properties, &method)) {
        OSSL_METHOD_CONSTRUCT_METHOD mcm = {
            alloc_tmp_method_store,
            dealloc_tmp_method_store,
            get_method_from_store,
            put_method_in_store,
            construct_method,
            destruct_method
        };
        struct method_data_st mcmdata;

        mcmdata.mcm = &mcm;
        mcmdata.libctx = libctx;
        mcmdata.operation_id = operation_id;
        mcmdata.name_id = name_id;
        mcmdata.name = name;
        mcmdata.propquery = properties;
        mcmdata.method_from_dispatch = new_method;
        mcmdata.destruct_method = free_method;
        mcmdata.refcnt_up_method = up_ref_method;
        mcmdata.destruct_method = free_method;
        mcmdata.method_data = method_data;
        if ((method = ossl_method_construct(libctx, operation_id,
                                            0 /* !force_cache */,
                                            &mcm, &mcmdata)) != NULL) {
            /*
             * If construction did create a method for us, we know that
             * there is a correct name_id and methodid, since those have
             * already been calculated in get_method_from_store() and
             * put_method_in_store() above.
             */
            if (name_id == 0)
                name_id = ossl_namemap_name2num(namemap, name);
            meth_id = method_id(operation_id, name_id);
            ossl_method_store_cache_set(store, meth_id, properties, method);
        }
    } else {
        up_ref_method(method);
    }

    return method;
}

void *evp_generic_fetch(OPENSSL_CTX *libctx, int operation_id,
                        const char *name, const char *properties,
                        void *(*new_method)(int name_id,
                                            const OSSL_DISPATCH *fns,
                                            OSSL_PROVIDER *prov,
                                            void *method_data),
                        void *method_data,
                        int (*up_ref_method)(void *),
                        void (*free_method)(void *))
{
    return inner_generic_fetch(libctx,
                               operation_id, 0, name, properties,
                               new_method, method_data,
                               up_ref_method, free_method);
}

/*
 * evp_generic_fetch_by_number() is special, and only returns methods for
 * already known names, i.e. it refuses to work if no name_id can be found
 * (it's considered an internal programming error).
 * This is meant to be used when one method needs to fetch an associated
 * other method.
 */
void *evp_generic_fetch_by_number(OPENSSL_CTX *libctx, int operation_id,
                                  int name_id, const char *properties,
                                  void *(*new_method)(int name_id,
                                                      const OSSL_DISPATCH *fns,
                                                      OSSL_PROVIDER *prov,
                                                      void *method_data),
                                  void *method_data,
                                  int (*up_ref_method)(void *),
                                  void (*free_method)(void *))
{
    return inner_generic_fetch(libctx,
                               operation_id, name_id, NULL, properties,
                               new_method, method_data,
                               up_ref_method, free_method);
}

int EVP_set_default_properties(OPENSSL_CTX *libctx, const char *propq)
{
    OSSL_METHOD_STORE *store = get_default_method_store(libctx);

    if (store != NULL)
        return ossl_method_store_set_global_properties(store, propq);
    EVPerr(EVP_F_EVP_SET_DEFAULT_PROPERTIES, ERR_R_INTERNAL_ERROR);
    return 0;
}

struct do_all_data_st {
    void (*user_fn)(void *method, void *arg);
    void *user_arg;
    void *(*new_method)(const int name_id, const OSSL_DISPATCH *fns,
                        OSSL_PROVIDER *prov, void *method_data);
    void (*free_method)(void *);
};

static void do_one(OSSL_PROVIDER *provider, const OSSL_ALGORITHM *algo,
                   int no_store, void *vdata)
{
    struct do_all_data_st *data = vdata;
    OPENSSL_CTX *libctx = ossl_provider_library_context(provider);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
    int name_id = ossl_namemap_add(namemap, 0, algo->algorithm_name);
    void *method = NULL;

    if (name_id != 0)
        method = data->new_method(name_id, algo->implementation, provider,
                                  NULL);

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

void evp_generic_do_all(OPENSSL_CTX *libctx, int operation_id,
                        void (*user_fn)(void *method, void *arg),
                        void *user_arg,
                        void *(*new_method)(int name_id,
                                            const OSSL_DISPATCH *fns,
                                            OSSL_PROVIDER *prov,
                                            void *method_data),
                        void *method_data,
                        void (*free_method)(void *))
{
    struct do_all_data_st data;

    data.new_method = new_method;
    data.free_method = free_method;
    data.user_fn = user_fn;
    data.user_arg = user_arg;
    ossl_algorithm_do_all(libctx, operation_id, method_data, do_one, &data);
}

const char *evp_first_name(OSSL_PROVIDER *prov, int name_id)
{
    OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);

    return ossl_namemap_num2name(namemap, name_id, 0);
}

int evp_is_a(OSSL_PROVIDER *prov, int number, const char *name)
{
    OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
    OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);

    return ossl_namemap_name2num(namemap, name) == number;
}
Commit	Line	Data
c13d2ab4 RL	1	/*
	2	* Copyright 2019 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 <stddef.h>
	11	#include <openssl/ossl_typ.h>
	12	#include <openssl/evp.h>
	13	#include <openssl/core.h>
	14	#include "internal/cryptlib.h"
	15	#include "internal/thread_once.h"
c13d2ab4 RL	16	#include "internal/property.h"
c13d2ab4 RL	17	#include "internal/core.h"
f7c16d48	18	#include "internal/provider.h"
baff732d	19	#include "internal/namemap.h"
c13d2ab4 RL	20	#include "internal/evp_int.h" /* evp_locl.h needs it */
	21	#include "evp_locl.h"
	22
c13d2ab4 RL	23	static void default_method_store_free(void *vstore)
	24	{
	25	ossl_method_store_free(vstore);
	26	}
	27
1aedc35f	28	static void default_method_store_new(OPENSSL_CTX ctx)
c13d2ab4	29	{
1aedc35f	30	return ossl_method_store_new(ctx);
c13d2ab4 RL	31	}
	32
	33
	34	static const OPENSSL_CTX_METHOD default_method_store_method = {
	35	default_method_store_new,
	36	default_method_store_free,
	37	};
	38
c13d2ab4 RL	39	/* Data to be passed through ossl_method_construct() */
c13d2ab4 RL	40	struct method_data_st {
baff732d	41	OPENSSL_CTX *libctx;
c13d2ab4	42	OSSL_METHOD_CONSTRUCT_METHOD *mcm;
f7c16d48 RL	43	int operation_id; /* For get_method_from_store() */
	44	int name_id; /* For get_method_from_store() */
	45	const char name; / For get_method_from_store() */
	46	const char propquery; / For get_method_from_store() */
	47	void (method_from_dispatch)(int name_id, const OSSL_DISPATCH *,
3ca9d210 RL	48	OSSL_PROVIDER , void );
3ca9d210 RL	49	void *method_data;
c13d2ab4 RL	50	int (refcnt_up_method)(void method);
	51	void (destruct_method)(void method);
	52	};
	53
	54	/*
	55	* Generic routines to fetch / create EVP methods with ossl_method_construct()
	56	*/
1aedc35f	57	static void alloc_tmp_method_store(OPENSSL_CTX ctx)
c13d2ab4	58	{
1aedc35f	59	return ossl_method_store_new(ctx);
c13d2ab4 RL	60	}
	61
	62	static void dealloc_tmp_method_store(void *store)
	63	{
	64	if (store != NULL)
	65	ossl_method_store_free(store);
	66	}
	67
cb929645	68	static OSSL_METHOD_STORE get_default_method_store(OPENSSL_CTX libctx)
c13d2ab4	69	{
1aedc35f MC	70	return openssl_ctx_get_data(libctx, OPENSSL_CTX_DEFAULT_METHOD_STORE_INDEX,
1aedc35f MC	71	&default_method_store_method);
c13d2ab4 RL	72	}
c13d2ab4 RL	73
2ccb1b4e RL	74	/*
	75	* To identity the method in the method store, we mix the name identity
	76	* with the operation identity, with the assumption that we don't have
	77	* more than 2^24 names or more than 2^8 operation types.
	78	*
	79	* The resulting identity is a 32-bit integer, composed like this:
	80	*
	81	* +---------24 bits--------+-8 bits-+
	82	* \| name identity \| op id \|
	83	* +------------------------+--------+
	84	*/
f7c16d48	85	static uint32_t method_id(unsigned int operation_id, int name_id)
2ccb1b4e RL	86	{
	87	if (!ossl_assert(name_id < (1 << 24) \|\| operation_id < (1 << 8))
	88	\|\| !ossl_assert(name_id > 0 && operation_id > 0))
	89	return 0;
	90	return ((name_id << 8) & 0xFFFFFF00) \| (operation_id & 0x000000FF);
	91	}
	92
c13d2ab4	93	static void get_method_from_store(OPENSSL_CTX libctx, void *store,
f7c16d48	94	void *data)
c13d2ab4 RL	95	{
	96	struct method_data_st *methdata = data;
	97	void *method = NULL;
f7c16d48 RL	98	int name_id;
f7c16d48 RL	99	uint32_t meth_id;
c13d2ab4	100
f7c16d48 RL	101	/*
	102	* get_method_from_store() is only called to try and get the method
	103	* that evp_generic_fetch() is asking for, and the operation id as
	104	* well as the name or name id are passed via methdata.
	105	*/
	106	if ((name_id = methdata->name_id) == 0) {
	107	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	108
	109	if (namemap == 0)
	110	return NULL;
	111	name_id = ossl_namemap_name2num(namemap, methdata->name);
	112	}
	113
	114	if (name_id == 0
	115	\|\| (meth_id = method_id(methdata->operation_id, name_id)) == 0)
c13d2ab4 RL	116	return NULL;
c13d2ab4 RL	117
f7c16d48 RL	118	if (store == NULL
f7c16d48 RL	119	&& (store = get_default_method_store(libctx)) == NULL)
2e49c054 RL	120	return NULL;
2e49c054 RL	121
f7c16d48 RL	122	(void)ossl_method_store_fetch(store, meth_id, methdata->propquery,
f7c16d48 RL	123	&method);
c13d2ab4 RL	124
	125	if (method != NULL
	126	&& !methdata->refcnt_up_method(method)) {
	127	method = NULL;
	128	}
	129	return method;
	130	}
	131
	132	static int put_method_in_store(OPENSSL_CTX libctx, void store,
c1d56231 RL	133	void method, const OSSL_PROVIDER prov,
	134	int operation_id, const char *name,
	135	const char propdef, void data)
c13d2ab4 RL	136	{
c13d2ab4 RL	137	struct method_data_st *methdata = data;
2e49c054	138	OSSL_NAMEMAP *namemap;
f7c16d48 RL	139	int name_id;
f7c16d48 RL	140	uint32_t meth_id;
dc46e3dd	141
f7c16d48 RL	142	/*
	143	* put_method_in_store() is only called with a method that was
	144	* successfully created by construct_method() below, which means
	145	* the name should already be stored in the namemap, so just use it.
	146	*/
	147	if ((namemap = ossl_namemap_stored(libctx)) == NULL
	148	\|\| (name_id = ossl_namemap_name2num(namemap, name)) == 0
	149	\|\| (meth_id = method_id(operation_id, name_id)) == 0)
dc46e3dd	150	return 0;
c13d2ab4 RL	151
	152	if (store == NULL
	153	&& (store = get_default_method_store(libctx)) == NULL)
	154	return 0;
	155
f7c16d48	156	return ossl_method_store_add(store, prov, meth_id, propdef, method,
b1d40ddf RL	157	methdata->refcnt_up_method,
b1d40ddf RL	158	methdata->destruct_method);
c13d2ab4 RL	159	}
c13d2ab4 RL	160
f7c16d48 RL	161	/*
	162	* The core fetching functionality passes the name of the implementation.
	163	* This function is responsible to getting an identity number for it.
	164	*/
2e49c054 RL	165	static void construct_method(const char name, const OSSL_DISPATCH *fns,
2e49c054 RL	166	OSSL_PROVIDER prov, void data)
c13d2ab4	167	{
f7c16d48 RL	168	/*
	169	* This function is only called if get_method_from_store() returned
	170	* NULL, so it's safe to say that of all the spots to create a new
	171	* namemap entry, this is it. Should the name already exist there, we
	172	* know that ossl_namemap_add() will return its corresponding number.
	173	*
	174	* TODO(3.0): If this function gets an array of names instead of just
	175	* one, we need to check through all the names to see if at least one
	176	* of them has an associated number, and use that. If several names
	177	* have associated numbers that differ from each other, it's an error.
	178	*/
c13d2ab4	179	struct method_data_st *methdata = data;
f7c16d48 RL	180	OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
	181	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	182	int name_id = ossl_namemap_add(namemap, 0, name);
c13d2ab4	183
f7c16d48	184	return methdata->method_from_dispatch(name_id, fns, prov,
3ca9d210	185	methdata->method_data);
c13d2ab4 RL	186	}
	187
	188	static void destruct_method(void method, void data)
	189	{
	190	struct method_data_st *methdata = data;
	191
	192	methdata->destruct_method(method);
	193	}
	194
f7c16d48 RL	195	static void inner_generic_fetch(OPENSSL_CTX libctx, int operation_id,
	196	int name_id, const char *name,
	197	const char *properties,
	198	void (new_method)(int name_id,
	199	const OSSL_DISPATCH *fns,
	200	OSSL_PROVIDER *prov,
	201	void *method_data),
	202	void *method_data,
	203	int (up_ref_method)(void ),
	204	void (free_method)(void ))
c13d2ab4	205	{
e019da7b	206	OSSL_METHOD_STORE *store = get_default_method_store(libctx);
baff732d	207	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
f7c16d48	208	uint32_t meth_id = 0;
c13d2ab4 RL	209	void *method = NULL;
c13d2ab4 RL	210
baff732d	211	if (store == NULL \|\| namemap == NULL)
e019da7b RL	212	return NULL;
e019da7b RL	213
2ccb1b4e RL	214	/*
	215	* If there's ever an operation_id == 0 passed, we have an internal
	216	* programming error.
	217	*/
	218	if (!ossl_assert(operation_id > 0))
	219	return NULL;
	220
	221	/*
f7c16d48 RL	222	* If we have been passed neither a name_id or a name, we have an
	223	* internal programming error.
	224	*/
	225	if (!ossl_assert(name_id != 0 \|\| name != NULL))
	226	return NULL;
	227
	228	/* If we haven't received a name id yet, try to get one for the name */
	229	if (name_id == 0)
	230	name_id = ossl_namemap_name2num(namemap, name);
	231
	232	/*
	233	* If we have a name id, calculate a method id with method_id().
	234	*
2ccb1b4e RL	235	* method_id returns 0 if we have too many operations (more than
	236	* about 2^8) or too many names (more than about 2^24). In that
	237	* case, we can't create any new method.
	238	*/
f7c16d48	239	if (name_id != 0 && (meth_id = method_id(operation_id, name_id)) == 0)
2ccb1b4e RL	240	return NULL;
2ccb1b4e RL	241
f7c16d48 RL	242	if (meth_id == 0
f7c16d48 RL	243	\|\| !ossl_method_store_cache_get(store, meth_id, properties, &method)) {
c13d2ab4 RL	244	OSSL_METHOD_CONSTRUCT_METHOD mcm = {
	245	alloc_tmp_method_store,
	246	dealloc_tmp_method_store,
	247	get_method_from_store,
	248	put_method_in_store,
	249	construct_method,
	250	destruct_method
	251	};
	252	struct method_data_st mcmdata;
	253
c13d2ab4	254	mcmdata.mcm = &mcm;
baff732d	255	mcmdata.libctx = libctx;
f7c16d48 RL	256	mcmdata.operation_id = operation_id;
f7c16d48 RL	257	mcmdata.name_id = name_id;
d5e5e2ff	258	mcmdata.name = name;
f7c16d48	259	mcmdata.propquery = properties;
c13d2ab4 RL	260	mcmdata.method_from_dispatch = new_method;
c13d2ab4 RL	261	mcmdata.destruct_method = free_method;
7c95390e	262	mcmdata.refcnt_up_method = up_ref_method;
c13d2ab4	263	mcmdata.destruct_method = free_method;
3ca9d210	264	mcmdata.method_data = method_data;
f7c16d48 RL	265	if ((method = ossl_method_construct(libctx, operation_id,
f7c16d48 RL	266	0 /* !force_cache */,
08607613	267	&mcm, &mcmdata)) != NULL) {
2ccb1b4e RL	268	/*
2ccb1b4e RL	269	* If construction did create a method for us, we know that
f7c16d48	270	* there is a correct name_id and methodid, since those have
2ccb1b4e RL	271	* already been calculated in get_method_from_store() and
	272	* put_method_in_store() above.
	273	*/
f7c16d48 RL	274	if (name_id == 0)
	275	name_id = ossl_namemap_name2num(namemap, name);
	276	meth_id = method_id(operation_id, name_id);
	277	ossl_method_store_cache_set(store, meth_id, properties, method);
2ccb1b4e	278	}
e019da7b	279	} else {
7c95390e	280	up_ref_method(method);
c13d2ab4 RL	281	}
	282
	283	return method;
	284	}
cb929645	285
f7c16d48 RL	286	void evp_generic_fetch(OPENSSL_CTX libctx, int operation_id,
	287	const char name, const char properties,
	288	void (new_method)(int name_id,
	289	const OSSL_DISPATCH *fns,
	290	OSSL_PROVIDER *prov,
	291	void *method_data),
	292	void *method_data,
	293	int (up_ref_method)(void ),
	294	void (free_method)(void ))
	295	{
	296	return inner_generic_fetch(libctx,
	297	operation_id, 0, name, properties,
	298	new_method, method_data,
	299	up_ref_method, free_method);
	300	}
	301
	302	/*
	303	* evp_generic_fetch_by_number() is special, and only returns methods for
	304	* already known names, i.e. it refuses to work if no name_id can be found
	305	* (it's considered an internal programming error).
	306	* This is meant to be used when one method needs to fetch an associated
	307	* other method.
	308	*/
	309	void evp_generic_fetch_by_number(OPENSSL_CTX libctx, int operation_id,
	310	int name_id, const char *properties,
	311	void (new_method)(int name_id,
	312	const OSSL_DISPATCH *fns,
	313	OSSL_PROVIDER *prov,
	314	void *method_data),
	315	void *method_data,
	316	int (up_ref_method)(void ),
	317	void (free_method)(void ))
	318	{
	319	return inner_generic_fetch(libctx,
	320	operation_id, name_id, NULL, properties,
	321	new_method, method_data,
	322	up_ref_method, free_method);
	323	}
	324
cb929645 RL	325	int EVP_set_default_properties(OPENSSL_CTX libctx, const char propq)
	326	{
	327	OSSL_METHOD_STORE *store = get_default_method_store(libctx);
	328
	329	if (store != NULL)
	330	return ossl_method_store_set_global_properties(store, propq);
	331	EVPerr(EVP_F_EVP_SET_DEFAULT_PROPERTIES, ERR_R_INTERNAL_ERROR);
	332	return 0;
	333	}
3d96a51c RL	334
	335	struct do_all_data_st {
	336	void (user_fn)(void method, void *arg);
	337	void *user_arg;
f7c16d48	338	void (new_method)(const int name_id, const OSSL_DISPATCH *fns,
3ca9d210	339	OSSL_PROVIDER prov, void method_data);
3d96a51c RL	340	void (free_method)(void );
	341	};
	342
	343	static void do_one(OSSL_PROVIDER provider, const OSSL_ALGORITHM algo,
	344	int no_store, void *vdata)
	345	{
	346	struct do_all_data_st *data = vdata;
f7c16d48 RL	347	OPENSSL_CTX *libctx = ossl_provider_library_context(provider);
	348	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	349	int name_id = ossl_namemap_add(namemap, 0, algo->algorithm_name);
	350	void *method = NULL;
	351
	352	if (name_id != 0)
	353	method = data->new_method(name_id, algo->implementation, provider,
	354	NULL);
3d96a51c RL	355
	356	if (method != NULL) {
	357	data->user_fn(method, data->user_arg);
	358	data->free_method(method);
	359	}
	360	}
	361
	362	void evp_generic_do_all(OPENSSL_CTX *libctx, int operation_id,
	363	void (user_fn)(void method, void *arg),
	364	void *user_arg,
f7c16d48	365	void (new_method)(int name_id,
3d96a51c	366	const OSSL_DISPATCH *fns,
3ca9d210 RL	367	OSSL_PROVIDER *prov,
	368	void *method_data),
	369	void *method_data,
3d96a51c RL	370	void (free_method)(void ))
	371	{
	372	struct do_all_data_st data;
	373
	374	data.new_method = new_method;
	375	data.free_method = free_method;
	376	data.user_fn = user_fn;
	377	data.user_arg = user_arg;
3ca9d210	378	ossl_algorithm_do_all(libctx, operation_id, method_data, do_one, &data);
3d96a51c	379	}
f7c16d48 RL	380
	381	const char evp_first_name(OSSL_PROVIDER prov, int name_id)
	382	{
	383	OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
	384	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	385
	386	return ossl_namemap_num2name(namemap, name_id, 0);
	387	}
7cfa1717 RL	388
	389	int evp_is_a(OSSL_PROVIDER prov, int number, const char name)
	390	{
	391	OPENSSL_CTX *libctx = ossl_provider_library_context(prov);
	392	OSSL_NAMEMAP *namemap = ossl_namemap_stored(libctx);
	393
	394	return ossl_namemap_name2num(namemap, name) == number;
	395	}