/src/openssl/providers/common/provider_util.c

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/*
 * Copyright 2019-2025 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
 */

/* We need to use some engine deprecated APIs */
#define OPENSSL_SUPPRESS_DEPRECATED

#include <openssl/evp.h>
#include <openssl/core_names.h>
#include <openssl/err.h>
#include <openssl/proverr.h>
#ifndef FIPS_MODULE
# include <openssl/engine.h>
# include "crypto/evp.h"
#endif
#include "prov/providercommon.h"
#include "prov/provider_util.h"

void ossl_prov_cipher_reset(PROV_CIPHER *pc)
{
    EVP_CIPHER_free(pc->alloc_cipher);
    pc->alloc_cipher = NULL;
    pc->cipher = NULL;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
    ENGINE_finish(pc->engine);
#endif
    pc->engine = NULL;
}

int ossl_prov_cipher_copy(PROV_CIPHER *dst, const PROV_CIPHER *src)
{
    if (src->alloc_cipher != NULL && !EVP_CIPHER_up_ref(src->alloc_cipher))
        return 0;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
    if (src->engine != NULL && !ENGINE_init(src->engine)) {
        EVP_CIPHER_free(src->alloc_cipher);
        return 0;
    }
#endif
    dst->engine = src->engine;
    dst->cipher = src->cipher;
    dst->alloc_cipher = src->alloc_cipher;
    return 1;
}

static int load_common(const OSSL_PARAM params[], const char **propquery,
                       ENGINE **engine)
{
    const OSSL_PARAM *p;

    *propquery = NULL;
    p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_PROPERTIES);
    if (p != NULL) {
        if (p->data_type != OSSL_PARAM_UTF8_STRING)
            return 0;
        *propquery = p->data;
    }

#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
    ENGINE_finish(*engine);
#endif
    *engine = NULL;
    /* Inside the FIPS module, we don't support legacy ciphers */
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
    p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE);
    if (p != NULL) {
        if (p->data_type != OSSL_PARAM_UTF8_STRING)
            return 0;
        /* Get a structural reference */
        *engine = ENGINE_by_id(p->data);
        if (*engine == NULL)
            return 0;
        /* Get a functional reference */
        if (!ENGINE_init(*engine)) {
            ENGINE_free(*engine);
            *engine = NULL;
            return 0;
        }
        /* Free the structural reference */
        ENGINE_free(*engine);
    }
#endif
    return 1;
}

int ossl_prov_cipher_load_from_params(PROV_CIPHER *pc,
                                      const OSSL_PARAM params[],
                                      OSSL_LIB_CTX *ctx)
{
    const OSSL_PARAM *p;
    const char *propquery;

    if (ossl_param_is_empty(params))
        return 1;

    if (!load_common(params, &propquery, &pc->engine))
        return 0;

    p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_CIPHER);
    if (p == NULL)
        return 1;
    if (p->data_type != OSSL_PARAM_UTF8_STRING)
        return 0;

    EVP_CIPHER_free(pc->alloc_cipher);
    ERR_set_mark();
    pc->cipher = pc->alloc_cipher = EVP_CIPHER_fetch(ctx, p->data, propquery);
#ifndef FIPS_MODULE /* Inside the FIPS module, we don't support legacy ciphers */
    if (pc->cipher == NULL) {
        const EVP_CIPHER *cipher;

        cipher = EVP_get_cipherbyname(p->data);
        /* Do not use global EVP_CIPHERs */
        if (cipher != NULL && cipher->origin != EVP_ORIG_GLOBAL)
            pc->cipher = cipher;
    }
#endif
    if (pc->cipher != NULL)
        ERR_pop_to_mark();
    else
        ERR_clear_last_mark();
    return pc->cipher != NULL;
}

const EVP_CIPHER *ossl_prov_cipher_cipher(const PROV_CIPHER *pc)
{
    return pc->cipher;
}

ENGINE *ossl_prov_cipher_engine(const PROV_CIPHER *pc)
{
    return pc->engine;
}

void ossl_prov_digest_reset(PROV_DIGEST *pd)
{
    EVP_MD_free(pd->alloc_md);
    pd->alloc_md = NULL;
    pd->md = NULL;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
    ENGINE_finish(pd->engine);
#endif
    pd->engine = NULL;
}

int ossl_prov_digest_copy(PROV_DIGEST *dst, const PROV_DIGEST *src)
{
    if (src->alloc_md != NULL && !EVP_MD_up_ref(src->alloc_md))
        return 0;
#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
    if (src->engine != NULL && !ENGINE_init(src->engine)) {
        EVP_MD_free(src->alloc_md);
        return 0;
    }
#endif
    dst->engine = src->engine;
    dst->md = src->md;
    dst->alloc_md = src->alloc_md;
    return 1;
}

const EVP_MD *ossl_prov_digest_fetch(PROV_DIGEST *pd, OSSL_LIB_CTX *libctx,
                                     const char *mdname, const char *propquery)
{
    EVP_MD_free(pd->alloc_md);
    pd->md = pd->alloc_md = EVP_MD_fetch(libctx, mdname, propquery);

    return pd->md;
}

int ossl_prov_digest_load_from_params(PROV_DIGEST *pd,
                                      const OSSL_PARAM params[],
                                      OSSL_LIB_CTX *ctx)
{
    const OSSL_PARAM *p;
    const char *propquery;

    if (ossl_param_is_empty(params))
        return 1;

    if (!load_common(params, &propquery, &pd->engine))
        return 0;

    p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_DIGEST);
    if (p == NULL)
        return 1;
    if (p->data_type != OSSL_PARAM_UTF8_STRING)
        return 0;

    ERR_set_mark();
    ossl_prov_digest_fetch(pd, ctx, p->data, propquery);
#ifndef FIPS_MODULE /* Inside the FIPS module, we don't support legacy digests */
    if (pd->md == NULL) {
        const EVP_MD *md;

        md = EVP_get_digestbyname(p->data);
        /* Do not use global EVP_MDs */
        if (md != NULL && md->origin != EVP_ORIG_GLOBAL)
            pd->md = md;
    }
#endif
    if (pd->md != NULL)
        ERR_pop_to_mark();
    else
        ERR_clear_last_mark();
    return pd->md != NULL;
}

void ossl_prov_digest_set_md(PROV_DIGEST *pd, EVP_MD *md)
{
    ossl_prov_digest_reset(pd);
    pd->md = pd->alloc_md = md;
}

const EVP_MD *ossl_prov_digest_md(const PROV_DIGEST *pd)
{
    return pd->md;
}

ENGINE *ossl_prov_digest_engine(const PROV_DIGEST *pd)
{
    return pd->engine;
}

int ossl_prov_set_macctx(EVP_MAC_CTX *macctx,
                         const OSSL_PARAM params[],
                         const char *ciphername,
                         const char *mdname,
                         const char *engine,
                         const char *properties,
                         const unsigned char *key,
                         size_t keylen)
{
    const OSSL_PARAM *p;
    OSSL_PARAM mac_params[6], *mp = mac_params;

    if (params != NULL) {
        if (mdname == NULL) {
            if ((p = OSSL_PARAM_locate_const(params,
                                            OSSL_ALG_PARAM_DIGEST)) != NULL) {
                if (p->data_type != OSSL_PARAM_UTF8_STRING)
                    return 0;
                mdname = p->data;
            }
        }
        if (ciphername == NULL) {
            if ((p = OSSL_PARAM_locate_const(params,
                                            OSSL_ALG_PARAM_CIPHER)) != NULL) {
                if (p->data_type != OSSL_PARAM_UTF8_STRING)
                    return 0;
                ciphername = p->data;
            }
        }
        if (engine == NULL) {
            if ((p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE))
                    != NULL) {
                if (p->data_type != OSSL_PARAM_UTF8_STRING)
                    return 0;
                engine = p->data;
            }
        }
    }

    if (mdname != NULL)
        *mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST,
                                                 (char *)mdname, 0);
    if (ciphername != NULL)
        *mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_CIPHER,
                                                 (char *)ciphername, 0);
    if (properties != NULL)
        *mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_PROPERTIES,
                                                 (char *)properties, 0);

#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
    if (engine != NULL)
        *mp++ = OSSL_PARAM_construct_utf8_string(OSSL_ALG_PARAM_ENGINE,
                                                 (char *) engine, 0);
#endif

    if (key != NULL)
        *mp++ = OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY,
                                                  (unsigned char *)key,
                                                  keylen);

    *mp = OSSL_PARAM_construct_end();

    return EVP_MAC_CTX_set_params(macctx, mac_params);

}

int ossl_prov_macctx_load_from_params(EVP_MAC_CTX **macctx,
                                      const OSSL_PARAM params[],
                                      const char *macname,
                                      const char *ciphername,
                                      const char *mdname,
                                      OSSL_LIB_CTX *libctx)
{
    const OSSL_PARAM *p;
    const char *properties = NULL;

    if (macname == NULL
        && (p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_MAC)) != NULL) {
        if (p->data_type != OSSL_PARAM_UTF8_STRING)
            return 0;
        macname = p->data;
    }
    if ((p = OSSL_PARAM_locate_const(params,
                                     OSSL_ALG_PARAM_PROPERTIES)) != NULL) {
        if (p->data_type != OSSL_PARAM_UTF8_STRING)
            return 0;
        properties = p->data;
    }

    /* If we got a new mac name, we make a new EVP_MAC_CTX */
    if (macname != NULL) {
        EVP_MAC *mac = EVP_MAC_fetch(libctx, macname, properties);

        EVP_MAC_CTX_free(*macctx);
        *macctx = mac == NULL ? NULL : EVP_MAC_CTX_new(mac);
        /* The context holds on to the MAC */
        EVP_MAC_free(mac);
        if (*macctx == NULL)
            return 0;
    }

    /*
     * If there is no MAC yet (and therefore, no MAC context), we ignore
     * all other parameters.
     */
    if (*macctx == NULL)
        return 1;

    if (ossl_prov_set_macctx(*macctx, params, ciphername, mdname, NULL,
                             properties, NULL, 0))
        return 1;

    EVP_MAC_CTX_free(*macctx);
    *macctx = NULL;
    return 0;
}

void ossl_prov_cache_exported_algorithms(const OSSL_ALGORITHM_CAPABLE *in,
                                         OSSL_ALGORITHM *out)
{
    int i, j;

    if (out[0].algorithm_names == NULL) {
        for (i = j = 0; in[i].alg.algorithm_names != NULL; ++i) {
            if (in[i].capable == NULL || in[i].capable())
                out[j++] = in[i].alg;
        }
        out[j++] = in[i].alg;
    }
}

/* Duplicate a lump of memory safely */
int ossl_prov_memdup(const void *src, size_t src_len,
                     unsigned char **dest, size_t *dest_len)
{
    if (src != NULL) {
        if ((*dest = OPENSSL_memdup(src, src_len)) == NULL)
            return 0;
        *dest_len = src_len;
    } else {
        *dest = NULL;
        *dest_len = 0;
    }
    return 1;
}

Coverage Report

Created: 2025-05-08 06:45

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2019-2025 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		/* We need to use some engine deprecated APIs */
11		#define OPENSSL_SUPPRESS_DEPRECATED
12
13		#include <openssl/evp.h>
14		#include <openssl/core_names.h>
15		#include <openssl/err.h>
16		#include <openssl/proverr.h>
17		#ifndef FIPS_MODULE
18		# include <openssl/engine.h>
19		# include "crypto/evp.h"
20		#endif
21		#include "prov/providercommon.h"
22		#include "prov/provider_util.h"
23
24		void ossl_prov_cipher_reset(PROV_CIPHER *pc)
25	0	{
26	0	EVP_CIPHER_free(pc->alloc_cipher);
27	0	pc->alloc_cipher = NULL;
28	0	pc->cipher = NULL;
29	0	#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
30	0	ENGINE_finish(pc->engine);
31	0	#endif
32	0	pc->engine = NULL;
33	0	}
34
35		int ossl_prov_cipher_copy(PROV_CIPHER dst, const PROV_CIPHER src)
36	0	{
37	0	if (src->alloc_cipher != NULL && !EVP_CIPHER_up_ref(src->alloc_cipher))
38	0	return 0;
39	0	#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
40	0	if (src->engine != NULL && !ENGINE_init(src->engine)) {
41	0	EVP_CIPHER_free(src->alloc_cipher);
42	0	return 0;
43	0	}
44	0	#endif
45	0	dst->engine = src->engine;
46	0	dst->cipher = src->cipher;
47	0	dst->alloc_cipher = src->alloc_cipher;
48	0	return 1;
49	0	}
50
51		static int load_common(const OSSL_PARAM params[], const char **propquery,
52		ENGINE **engine)
53	0	{
54	0	const OSSL_PARAM *p;
55
56	0	*propquery = NULL;
57	0	p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_PROPERTIES);
58	0	if (p != NULL) {
59	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
60	0	return 0;
61	0	*propquery = p->data;
62	0	}
63
64	0	#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
65	0	ENGINE_finish(*engine);
66	0	#endif
67	0	*engine = NULL;
68		/* Inside the FIPS module, we don't support legacy ciphers */
69	0	#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
70	0	p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE);
71	0	if (p != NULL) {
72	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
73	0	return 0;
74		/* Get a structural reference */
75	0	*engine = ENGINE_by_id(p->data);
76	0	if (*engine == NULL)
77	0	return 0;
78		/* Get a functional reference */
79	0	if (!ENGINE_init(*engine)) {
80	0	ENGINE_free(*engine);
81	0	*engine = NULL;
82	0	return 0;
83	0	}
84		/* Free the structural reference */
85	0	ENGINE_free(*engine);
86	0	}
87	0	#endif
88	0	return 1;
89	0	}
90
91		int ossl_prov_cipher_load_from_params(PROV_CIPHER *pc,
92		const OSSL_PARAM params[],
93		OSSL_LIB_CTX *ctx)
94	0	{
95	0	const OSSL_PARAM *p;
96	0	const char *propquery;
97
98	0	if (ossl_param_is_empty(params))
99	0	return 1;
100
101	0	if (!load_common(params, &propquery, &pc->engine))
102	0	return 0;
103
104	0	p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_CIPHER);
105	0	if (p == NULL)
106	0	return 1;
107	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
108	0	return 0;
109
110	0	EVP_CIPHER_free(pc->alloc_cipher);
111	0	ERR_set_mark();
112	0	pc->cipher = pc->alloc_cipher = EVP_CIPHER_fetch(ctx, p->data, propquery);
113	0	#ifndef FIPS_MODULE /* Inside the FIPS module, we don't support legacy ciphers */
114	0	if (pc->cipher == NULL) {
115	0	const EVP_CIPHER *cipher;
116
117	0	cipher = EVP_get_cipherbyname(p->data);
118		/* Do not use global EVP_CIPHERs */
119	0	if (cipher != NULL && cipher->origin != EVP_ORIG_GLOBAL)
120	0	pc->cipher = cipher;
121	0	}
122	0	#endif
123	0	if (pc->cipher != NULL)
124	0	ERR_pop_to_mark();
125	0	else
126	0	ERR_clear_last_mark();
127	0	return pc->cipher != NULL;
128	0	}
129
130		const EVP_CIPHER ossl_prov_cipher_cipher(const PROV_CIPHER pc)
131	0	{
132	0	return pc->cipher;
133	0	}
134
135		ENGINE ossl_prov_cipher_engine(const PROV_CIPHER pc)
136	0	{
137	0	return pc->engine;
138	0	}
139
140		void ossl_prov_digest_reset(PROV_DIGEST *pd)
141	0	{
142	0	EVP_MD_free(pd->alloc_md);
143	0	pd->alloc_md = NULL;
144	0	pd->md = NULL;
145	0	#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
146	0	ENGINE_finish(pd->engine);
147	0	#endif
148	0	pd->engine = NULL;
149	0	}
150
151		int ossl_prov_digest_copy(PROV_DIGEST dst, const PROV_DIGEST src)
152	0	{
153	0	if (src->alloc_md != NULL && !EVP_MD_up_ref(src->alloc_md))
154	0	return 0;
155	0	#if !defined(FIPS_MODULE) && !defined(OPENSSL_NO_ENGINE)
156	0	if (src->engine != NULL && !ENGINE_init(src->engine)) {
157	0	EVP_MD_free(src->alloc_md);
158	0	return 0;
159	0	}
160	0	#endif
161	0	dst->engine = src->engine;
162	0	dst->md = src->md;
163	0	dst->alloc_md = src->alloc_md;
164	0	return 1;
165	0	}
166
167		const EVP_MD ossl_prov_digest_fetch(PROV_DIGEST pd, OSSL_LIB_CTX *libctx,
168		const char mdname, const char propquery)
169	0	{
170	0	EVP_MD_free(pd->alloc_md);
171	0	pd->md = pd->alloc_md = EVP_MD_fetch(libctx, mdname, propquery);
172
173	0	return pd->md;
174	0	}
175
176		int ossl_prov_digest_load_from_params(PROV_DIGEST *pd,
177		const OSSL_PARAM params[],
178		OSSL_LIB_CTX *ctx)
179	0	{
180	0	const OSSL_PARAM *p;
181	0	const char *propquery;
182
183	0	if (ossl_param_is_empty(params))
184	0	return 1;
185
186	0	if (!load_common(params, &propquery, &pd->engine))
187	0	return 0;
188
189	0	p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_DIGEST);
190	0	if (p == NULL)
191	0	return 1;
192	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
193	0	return 0;
194
195	0	ERR_set_mark();
196	0	ossl_prov_digest_fetch(pd, ctx, p->data, propquery);
197	0	#ifndef FIPS_MODULE /* Inside the FIPS module, we don't support legacy digests */
198	0	if (pd->md == NULL) {
199	0	const EVP_MD *md;
200
201	0	md = EVP_get_digestbyname(p->data);
202		/* Do not use global EVP_MDs */
203	0	if (md != NULL && md->origin != EVP_ORIG_GLOBAL)
204	0	pd->md = md;
205	0	}
206	0	#endif
207	0	if (pd->md != NULL)
208	0	ERR_pop_to_mark();
209	0	else
210	0	ERR_clear_last_mark();
211	0	return pd->md != NULL;
212	0	}
213
214		void ossl_prov_digest_set_md(PROV_DIGEST pd, EVP_MD md)
215	0	{
216	0	ossl_prov_digest_reset(pd);
217	0	pd->md = pd->alloc_md = md;
218	0	}
219
220		const EVP_MD ossl_prov_digest_md(const PROV_DIGEST pd)
221	0	{
222	0	return pd->md;
223	0	}
224
225		ENGINE ossl_prov_digest_engine(const PROV_DIGEST pd)
226	0	{
227	0	return pd->engine;
228	0	}
229
230		int ossl_prov_set_macctx(EVP_MAC_CTX *macctx,
231		const OSSL_PARAM params[],
232		const char *ciphername,
233		const char *mdname,
234		const char *engine,
235		const char *properties,
236		const unsigned char *key,
237		size_t keylen)
238	0	{
239	0	const OSSL_PARAM *p;
240	0	OSSL_PARAM mac_params[6], *mp = mac_params;
241
242	0	if (params != NULL) {
243	0	if (mdname == NULL) {
244	0	if ((p = OSSL_PARAM_locate_const(params,
245	0	OSSL_ALG_PARAM_DIGEST)) != NULL) {
246	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
247	0	return 0;
248	0	mdname = p->data;
249	0	}
250	0	}
251	0	if (ciphername == NULL) {
252	0	if ((p = OSSL_PARAM_locate_const(params,
253	0	OSSL_ALG_PARAM_CIPHER)) != NULL) {
254	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
255	0	return 0;
256	0	ciphername = p->data;
257	0	}
258	0	}
259	0	if (engine == NULL) {
260	0	if ((p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_ENGINE))
261	0	!= NULL) {
262	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
263	0	return 0;
264	0	engine = p->data;
265	0	}
266	0	}
267	0	}
268
269	0	if (mdname != NULL)
270	0	*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_DIGEST,
271	0	(char *)mdname, 0);
272	0	if (ciphername != NULL)
273	0	*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_CIPHER,
274	0	(char *)ciphername, 0);
275	0	if (properties != NULL)
276	0	*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_MAC_PARAM_PROPERTIES,
277	0	(char *)properties, 0);
278
279	0	#if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODULE)
280	0	if (engine != NULL)
281	0	*mp++ = OSSL_PARAM_construct_utf8_string(OSSL_ALG_PARAM_ENGINE,
282	0	(char *) engine, 0);
283	0	#endif
284
285	0	if (key != NULL)
286	0	*mp++ = OSSL_PARAM_construct_octet_string(OSSL_MAC_PARAM_KEY,
287	0	(unsigned char *)key,
288	0	keylen);
289
290	0	*mp = OSSL_PARAM_construct_end();
291
292	0	return EVP_MAC_CTX_set_params(macctx, mac_params);
293
294	0	}
295
296		int ossl_prov_macctx_load_from_params(EVP_MAC_CTX **macctx,
297		const OSSL_PARAM params[],
298		const char *macname,
299		const char *ciphername,
300		const char *mdname,
301		OSSL_LIB_CTX *libctx)
302	0	{
303	0	const OSSL_PARAM *p;
304	0	const char *properties = NULL;
305
306	0	if (macname == NULL
307	0	&& (p = OSSL_PARAM_locate_const(params, OSSL_ALG_PARAM_MAC)) != NULL) {
308	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
309	0	return 0;
310	0	macname = p->data;
311	0	}
312	0	if ((p = OSSL_PARAM_locate_const(params,
313	0	OSSL_ALG_PARAM_PROPERTIES)) != NULL) {
314	0	if (p->data_type != OSSL_PARAM_UTF8_STRING)
315	0	return 0;
316	0	properties = p->data;
317	0	}
318
319		/* If we got a new mac name, we make a new EVP_MAC_CTX */
320	0	if (macname != NULL) {
321	0	EVP_MAC *mac = EVP_MAC_fetch(libctx, macname, properties);
322
323	0	EVP_MAC_CTX_free(*macctx);
324	0	*macctx = mac == NULL ? NULL : EVP_MAC_CTX_new(mac);
325		/* The context holds on to the MAC */
326	0	EVP_MAC_free(mac);
327	0	if (*macctx == NULL)
328	0	return 0;
329	0	}
330
331		/*
332		* If there is no MAC yet (and therefore, no MAC context), we ignore
333		* all other parameters.
334		*/
335	0	if (*macctx == NULL)
336	0	return 1;
337
338	0	if (ossl_prov_set_macctx(*macctx, params, ciphername, mdname, NULL,
339	0	properties, NULL, 0))
340	0	return 1;
341
342	0	EVP_MAC_CTX_free(*macctx);
343	0	*macctx = NULL;
344	0	return 0;
345	0	}
346
347		void ossl_prov_cache_exported_algorithms(const OSSL_ALGORITHM_CAPABLE *in,
348		OSSL_ALGORITHM *out)
349	197	{
350	197	int i, j;
351
352	197	if (out[0].algorithm_names == NULL) {
353	131	for (i = j = 0; in[i].alg.algorithm_names != NULL; ++i) {
354	130	if (in[i].capable == NULL \|\| in[i].capable())
355	130	out[j++] = in[i].alg;
356	130	}
357	1	out[j++] = in[i].alg;
358	1	}
359	197	}
360
361		/* Duplicate a lump of memory safely */
362		int ossl_prov_memdup(const void *src, size_t src_len,
363		unsigned char *dest, size_t dest_len)
364	0	{
365	0	if (src != NULL) {
366	0	if ((*dest = OPENSSL_memdup(src, src_len)) == NULL)
367	0	return 0;
368	0	*dest_len = src_len;
369	0	} else {
370	0	*dest = NULL;
371	0	*dest_len = 0;
372	0	}
373	0	return 1;
374	0	}