/src/openssl/providers/implementations/macs/hmac_prov.c

Source
/*
 * Copyright 2018-2025 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
 */

/*
 * HMAC low level APIs are deprecated for public use, but still ok for internal
 * use.
 */
#include "internal/deprecated.h"

#include <string.h>

#include <openssl/core_dispatch.h>
#include <openssl/core_names.h>
#include <openssl/params.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/proverr.h>
#include <openssl/err.h>

#include "internal/ssl3_cbc.h"
#include "internal/cryptlib.h"

#include "prov/implementations.h"
#include "prov/provider_ctx.h"
#include "prov/provider_util.h"
#include "prov/providercommon.h"
#include "prov/securitycheck.h"
#include "providers/implementations/macs/hmac_prov.inc"

/*
 * Forward declaration of everything implemented here.  This is not strictly
 * necessary for the compiler, but provides an assurance that the signatures
 * of the functions in the dispatch table are correct.
 */
static OSSL_FUNC_mac_newctx_fn hmac_new;
static OSSL_FUNC_mac_dupctx_fn hmac_dup;
static OSSL_FUNC_mac_freectx_fn hmac_free;
static OSSL_FUNC_mac_gettable_ctx_params_fn hmac_gettable_ctx_params;
static OSSL_FUNC_mac_get_ctx_params_fn hmac_get_ctx_params;
static OSSL_FUNC_mac_settable_ctx_params_fn hmac_settable_ctx_params;
static OSSL_FUNC_mac_set_ctx_params_fn hmac_set_ctx_params;
static OSSL_FUNC_mac_init_fn hmac_init;
static OSSL_FUNC_mac_update_fn hmac_update;
static OSSL_FUNC_mac_final_fn hmac_final;

/* local HMAC context structure */

/* typedef EVP_MAC_IMPL */
struct hmac_data_st {
    void *provctx;
    HMAC_CTX *ctx;               /* HMAC context */
    PROV_DIGEST digest;
    unsigned char *key;
    size_t keylen;
    /* Length of full TLS record including the MAC and any padding */
    size_t tls_data_size;
    unsigned char tls_header[13];
    int tls_header_set;
    unsigned char tls_mac_out[EVP_MAX_MD_SIZE];
    size_t tls_mac_out_size;
#ifdef FIPS_MODULE
    /*
     * 'internal' is set to 1 if HMAC is used inside another algorithm such as a
     * KDF. In this case it is the parent algorithm that is responsible for
     * performing any conditional FIPS indicator related checks for the HMAC.
     */
    int internal;
#endif
    OSSL_FIPS_IND_DECLARE
};

static void *hmac_new(void *provctx)
{
    struct hmac_data_st *macctx;

    if (!ossl_prov_is_running())
        return NULL;

    if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
        || (macctx->ctx = HMAC_CTX_new()) == NULL) {
        OPENSSL_free(macctx);
        return NULL;
    }
    macctx->provctx = provctx;
    OSSL_FIPS_IND_INIT(macctx)

    return macctx;
}

static void hmac_free(void *vmacctx)
{
    struct hmac_data_st *macctx = vmacctx;

    if (macctx != NULL) {
        HMAC_CTX_free(macctx->ctx);
        ossl_prov_digest_reset(&macctx->digest);
        OPENSSL_clear_free(macctx->key, macctx->keylen);
        OPENSSL_free(macctx);
    }
}

static void *hmac_dup(void *vsrc)
{
    struct hmac_data_st *src = vsrc;
    struct hmac_data_st *dst;
    HMAC_CTX *ctx;

    if (!ossl_prov_is_running())
        return NULL;
    dst = hmac_new(src->provctx);
    if (dst == NULL)
        return NULL;

    ctx = dst->ctx;
    *dst = *src;
    dst->ctx = ctx;
    dst->key = NULL;
    memset(&dst->digest, 0, sizeof(dst->digest));

    if (!HMAC_CTX_copy(dst->ctx, src->ctx)
        || !ossl_prov_digest_copy(&dst->digest, &src->digest)) {
        hmac_free(dst);
        return NULL;
    }
    if (src->key != NULL) {
        dst->key = OPENSSL_malloc(src->keylen > 0 ? src->keylen : 1);
        if (dst->key == NULL) {
            hmac_free(dst);
            return 0;
        }
        if (src->keylen > 0)
            memcpy(dst->key, src->key, src->keylen);
    }
    return dst;
}

static size_t hmac_size(struct hmac_data_st *macctx)
{
    return HMAC_size(macctx->ctx);
}

static int hmac_block_size(struct hmac_data_st *macctx)
{
    const EVP_MD *md = ossl_prov_digest_md(&macctx->digest);

    if (md == NULL)
        return 0;
    return EVP_MD_block_size(md);
}

static int hmac_setkey(struct hmac_data_st *macctx,
                       const unsigned char *key, size_t keylen)
{
    const EVP_MD *digest;

#ifdef FIPS_MODULE
    /*
     * KDF's pass a salt rather than a key,
     * which is why it skips the key check unless "HMAC" is fetched directly.
     */
    if (!macctx->internal) {
        OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(macctx->provctx);
        int approved = ossl_mac_check_key_size(keylen);

        if (!approved) {
            if (!OSSL_FIPS_IND_ON_UNAPPROVED(macctx, OSSL_FIPS_IND_SETTABLE0,
                                             libctx, "HMAC", "keysize",
                                             ossl_fips_config_hmac_key_check)) {
                ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
                return 0;
            }
        }
    }
#endif

    if (macctx->key != NULL)
        OPENSSL_clear_free(macctx->key, macctx->keylen);
    /* Keep a copy of the key in case we need it for TLS HMAC */
    macctx->key = OPENSSL_malloc(keylen > 0 ? keylen : 1);
    if (macctx->key == NULL)
        return 0;

    if (keylen > 0)
        memcpy(macctx->key, key, keylen);
    macctx->keylen = keylen;

    digest = ossl_prov_digest_md(&macctx->digest);
    /* HMAC_Init_ex doesn't tolerate all zero params, so we must be careful */
    if (key != NULL || (macctx->tls_data_size == 0 && digest != NULL))
        return HMAC_Init_ex(macctx->ctx, key, (int)keylen, digest,
                            ossl_prov_digest_engine(&macctx->digest));
    return 1;
}

static int hmac_init(void *vmacctx, const unsigned char *key,
                     size_t keylen, const OSSL_PARAM params[])
{
    struct hmac_data_st *macctx = vmacctx;

    if (!ossl_prov_is_running() || !hmac_set_ctx_params(macctx, params))
        return 0;

    if (key != NULL)
        return hmac_setkey(macctx, key, keylen);

    /* Just reinit the HMAC context */
    return HMAC_Init_ex(macctx->ctx, NULL, 0, NULL, NULL);
}

static int hmac_update(void *vmacctx, const unsigned char *data,
                       size_t datalen)
{
    struct hmac_data_st *macctx = vmacctx;

    if (macctx->tls_data_size > 0) {
        /* We're doing a TLS HMAC */
        if (!macctx->tls_header_set) {
            /* We expect the first update call to contain the TLS header */
            if (datalen != sizeof(macctx->tls_header))
                return 0;
            memcpy(macctx->tls_header, data, datalen);
            macctx->tls_header_set = 1;
            return 1;
        }
        /* macctx->tls_data_size is datalen plus the padding length */
        if (macctx->tls_data_size < datalen)
            return 0;

        return ssl3_cbc_digest_record(ossl_prov_digest_md(&macctx->digest),
                                      macctx->tls_mac_out,
                                      &macctx->tls_mac_out_size,
                                      macctx->tls_header,
                                      data,
                                      datalen,
                                      macctx->tls_data_size,
                                      macctx->key,
                                      macctx->keylen,
                                      0);
    }

    return HMAC_Update(macctx->ctx, data, datalen);
}

static int hmac_final(void *vmacctx, unsigned char *out, size_t *outl,
                      size_t outsize)
{
    unsigned int hlen;
    struct hmac_data_st *macctx = vmacctx;

    if (!ossl_prov_is_running())
        return 0;
    if (macctx->tls_data_size > 0) {
        if (macctx->tls_mac_out_size == 0)
            return 0;
        if (outl != NULL)
            *outl = macctx->tls_mac_out_size;
        memcpy(out, macctx->tls_mac_out, macctx->tls_mac_out_size);
        return 1;
    }
    if (!HMAC_Final(macctx->ctx, out, &hlen))
        return 0;
    *outl = hlen;
    return 1;
}

static const OSSL_PARAM *hmac_gettable_ctx_params(ossl_unused void *ctx,
                                                  ossl_unused void *provctx)
{
    return hmac_get_ctx_params_list;
}

static int hmac_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
{
    struct hmac_data_st *macctx = vmacctx;
    struct hmac_get_ctx_params_st p;

    if (macctx == NULL || !hmac_get_ctx_params_decoder(params, &p))
        return 0;

    if (p.size != NULL && !OSSL_PARAM_set_size_t(p.size, hmac_size(macctx)))
        return 0;

    if (p.bsize != NULL && !OSSL_PARAM_set_int(p.bsize, hmac_block_size(macctx)))
        return 0;

#ifdef FIPS_MODULE
    if (p.ind != NULL) {
        int approved = 0;

        if (!macctx->internal)
            approved = OSSL_FIPS_IND_GET(macctx)->approved;
        if (!OSSL_PARAM_set_int(p.ind, approved))
            return 0;
    }
#endif
    return 1;
}

static const OSSL_PARAM *hmac_settable_ctx_params(ossl_unused void *ctx,
                                                  ossl_unused void *provctx)
{
    return hmac_set_ctx_params_list;
}

/*
 * ALL parameters should be set before init().
 */
static int hmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
{
    struct hmac_data_st *macctx = vmacctx;
    OSSL_LIB_CTX *ctx;
    struct hmac_set_ctx_params_st p;

    if (macctx == NULL || !hmac_set_ctx_params_decoder(params, &p))
        return 0;

    ctx = PROV_LIBCTX_OF(macctx->provctx);

    if (!OSSL_FIPS_IND_SET_CTX_FROM_PARAM(macctx, OSSL_FIPS_IND_SETTABLE0, p.ind_k))
        return 0;

    if (p.digest != NULL
            && !ossl_prov_digest_load(&macctx->digest, p.digest, p.propq,
                                      p.engine, ctx))
        return 0;

    if (p.key != NULL) {
        if (p.key->data_type != OSSL_PARAM_OCTET_STRING)
            return 0;

        if (!hmac_setkey(macctx, p.key->data, p.key->data_size))
            return 0;
    }

    if (p.tlssize != NULL && !OSSL_PARAM_get_size_t(p.tlssize, &macctx->tls_data_size))
        return 0;

    return 1;
}

const OSSL_DISPATCH ossl_hmac_functions[] = {
    { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_new },
    { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
    { OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
    { OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
    { OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
    { OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
    { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
      (void (*)(void))hmac_gettable_ctx_params },
    { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))hmac_get_ctx_params },
    { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
      (void (*)(void))hmac_settable_ctx_params },
    { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))hmac_set_ctx_params },
    OSSL_DISPATCH_END
};

#ifdef FIPS_MODULE
static OSSL_FUNC_mac_newctx_fn hmac_internal_new;

static void *hmac_internal_new(void *provctx)
{
    struct hmac_data_st *macctx = hmac_new(provctx);

    if (macctx != NULL)
        macctx->internal = 1;
    return macctx;
}

const OSSL_DISPATCH ossl_hmac_internal_functions[] = {
    { OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_internal_new },
    { OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
    { OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
    { OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
    { OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
    { OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
    { OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
      (void (*)(void))hmac_gettable_ctx_params },
    { OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))hmac_get_ctx_params },
    { OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
      (void (*)(void))hmac_settable_ctx_params },
    { OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))hmac_set_ctx_params },
    OSSL_DISPATCH_END
};

#endif /* FIPS_MODULE */

Coverage Report

Created: 2025-10-28 06:56

Line	Count	Source
1		/*
2		* Copyright 2018-2025 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		/*
11		* HMAC low level APIs are deprecated for public use, but still ok for internal
12		* use.
13		*/
14		#include "internal/deprecated.h"
15
16		#include <string.h>
17
18		#include <openssl/core_dispatch.h>
19		#include <openssl/core_names.h>
20		#include <openssl/params.h>
21		#include <openssl/evp.h>
22		#include <openssl/hmac.h>
23		#include <openssl/proverr.h>
24		#include <openssl/err.h>
25
26		#include "internal/ssl3_cbc.h"
27		#include "internal/cryptlib.h"
28
29		#include "prov/implementations.h"
30		#include "prov/provider_ctx.h"
31		#include "prov/provider_util.h"
32		#include "prov/providercommon.h"
33		#include "prov/securitycheck.h"
34		#include "providers/implementations/macs/hmac_prov.inc"
35
36		/*
37		* Forward declaration of everything implemented here. This is not strictly
38		* necessary for the compiler, but provides an assurance that the signatures
39		* of the functions in the dispatch table are correct.
40		*/
41		static OSSL_FUNC_mac_newctx_fn hmac_new;
42		static OSSL_FUNC_mac_dupctx_fn hmac_dup;
43		static OSSL_FUNC_mac_freectx_fn hmac_free;
44		static OSSL_FUNC_mac_gettable_ctx_params_fn hmac_gettable_ctx_params;
45		static OSSL_FUNC_mac_get_ctx_params_fn hmac_get_ctx_params;
46		static OSSL_FUNC_mac_settable_ctx_params_fn hmac_settable_ctx_params;
47		static OSSL_FUNC_mac_set_ctx_params_fn hmac_set_ctx_params;
48		static OSSL_FUNC_mac_init_fn hmac_init;
49		static OSSL_FUNC_mac_update_fn hmac_update;
50		static OSSL_FUNC_mac_final_fn hmac_final;
51
52		/* local HMAC context structure */
53
54		/* typedef EVP_MAC_IMPL */
55		struct hmac_data_st {
56		void *provctx;
57		HMAC_CTX ctx; / HMAC context */
58		PROV_DIGEST digest;
59		unsigned char *key;
60		size_t keylen;
61		/* Length of full TLS record including the MAC and any padding */
62		size_t tls_data_size;
63		unsigned char tls_header[13];
64		int tls_header_set;
65		unsigned char tls_mac_out[EVP_MAX_MD_SIZE];
66		size_t tls_mac_out_size;
67		#ifdef FIPS_MODULE
68		/*
69		* 'internal' is set to 1 if HMAC is used inside another algorithm such as a
70		* KDF. In this case it is the parent algorithm that is responsible for
71		* performing any conditional FIPS indicator related checks for the HMAC.
72		*/
73		int internal;
74		#endif
75		OSSL_FIPS_IND_DECLARE
76		};
77
78		static void hmac_new(void provctx)
79	0	{
80	0	struct hmac_data_st *macctx;
81
82	0	if (!ossl_prov_is_running())
83	0	return NULL;
84
85	0	if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
86	0	\|\| (macctx->ctx = HMAC_CTX_new()) == NULL) {
87	0	OPENSSL_free(macctx);
88	0	return NULL;
89	0	}
90	0	macctx->provctx = provctx;
91	0	OSSL_FIPS_IND_INIT(macctx)
92
93	0	return macctx;
94	0	}
95
96		static void hmac_free(void *vmacctx)
97	0	{
98	0	struct hmac_data_st *macctx = vmacctx;
99
100	0	if (macctx != NULL) {
101	0	HMAC_CTX_free(macctx->ctx);
102	0	ossl_prov_digest_reset(&macctx->digest);
103	0	OPENSSL_clear_free(macctx->key, macctx->keylen);
104	0	OPENSSL_free(macctx);
105	0	}
106	0	}
107
108		static void hmac_dup(void vsrc)
109	0	{
110	0	struct hmac_data_st *src = vsrc;
111	0	struct hmac_data_st *dst;
112	0	HMAC_CTX *ctx;
113
114	0	if (!ossl_prov_is_running())
115	0	return NULL;
116	0	dst = hmac_new(src->provctx);
117	0	if (dst == NULL)
118	0	return NULL;
119
120	0	ctx = dst->ctx;
121	0	dst = src;
122	0	dst->ctx = ctx;
123	0	dst->key = NULL;
124	0	memset(&dst->digest, 0, sizeof(dst->digest));
125
126	0	if (!HMAC_CTX_copy(dst->ctx, src->ctx)
127	0	\|\| !ossl_prov_digest_copy(&dst->digest, &src->digest)) {
128	0	hmac_free(dst);
129	0	return NULL;
130	0	}
131	0	if (src->key != NULL) {
132	0	dst->key = OPENSSL_malloc(src->keylen > 0 ? src->keylen : 1);
133	0	if (dst->key == NULL) {
134	0	hmac_free(dst);
135	0	return 0;
136	0	}
137	0	if (src->keylen > 0)
138	0	memcpy(dst->key, src->key, src->keylen);
139	0	}
140	0	return dst;
141	0	}
142
143		static size_t hmac_size(struct hmac_data_st *macctx)
144	0	{
145	0	return HMAC_size(macctx->ctx);
146	0	}
147
148		static int hmac_block_size(struct hmac_data_st *macctx)
149	0	{
150	0	const EVP_MD *md = ossl_prov_digest_md(&macctx->digest);
151
152	0	if (md == NULL)
153	0	return 0;
154	0	return EVP_MD_block_size(md);
155	0	}
156
157		static int hmac_setkey(struct hmac_data_st *macctx,
158		const unsigned char *key, size_t keylen)
159	0	{
160	0	const EVP_MD *digest;
161
162		#ifdef FIPS_MODULE
163		/*
164		* KDF's pass a salt rather than a key,
165		* which is why it skips the key check unless "HMAC" is fetched directly.
166		*/
167		if (!macctx->internal) {
168		OSSL_LIB_CTX *libctx = PROV_LIBCTX_OF(macctx->provctx);
169		int approved = ossl_mac_check_key_size(keylen);
170
171		if (!approved) {
172		if (!OSSL_FIPS_IND_ON_UNAPPROVED(macctx, OSSL_FIPS_IND_SETTABLE0,
173		libctx, "HMAC", "keysize",
174		ossl_fips_config_hmac_key_check)) {
175		ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
176		return 0;
177		}
178		}
179		}
180		#endif
181
182	0	if (macctx->key != NULL)
183	0	OPENSSL_clear_free(macctx->key, macctx->keylen);
184		/* Keep a copy of the key in case we need it for TLS HMAC */
185	0	macctx->key = OPENSSL_malloc(keylen > 0 ? keylen : 1);
186	0	if (macctx->key == NULL)
187	0	return 0;
188
189	0	if (keylen > 0)
190	0	memcpy(macctx->key, key, keylen);
191	0	macctx->keylen = keylen;
192
193	0	digest = ossl_prov_digest_md(&macctx->digest);
194		/* HMAC_Init_ex doesn't tolerate all zero params, so we must be careful */
195	0	if (key != NULL \|\| (macctx->tls_data_size == 0 && digest != NULL))
196	0	return HMAC_Init_ex(macctx->ctx, key, (int)keylen, digest,
197	0	ossl_prov_digest_engine(&macctx->digest));
198	0	return 1;
199	0	}
200
201		static int hmac_init(void vmacctx, const unsigned char key,
202		size_t keylen, const OSSL_PARAM params[])
203	0	{
204	0	struct hmac_data_st *macctx = vmacctx;
205
206	0	if (!ossl_prov_is_running() \|\| !hmac_set_ctx_params(macctx, params))
207	0	return 0;
208
209	0	if (key != NULL)
210	0	return hmac_setkey(macctx, key, keylen);
211
212		/* Just reinit the HMAC context */
213	0	return HMAC_Init_ex(macctx->ctx, NULL, 0, NULL, NULL);
214	0	}
215
216		static int hmac_update(void vmacctx, const unsigned char data,
217		size_t datalen)
218	0	{
219	0	struct hmac_data_st *macctx = vmacctx;
220
221	0	if (macctx->tls_data_size > 0) {
222		/* We're doing a TLS HMAC */
223	0	if (!macctx->tls_header_set) {
224		/* We expect the first update call to contain the TLS header */
225	0	if (datalen != sizeof(macctx->tls_header))
226	0	return 0;
227	0	memcpy(macctx->tls_header, data, datalen);
228	0	macctx->tls_header_set = 1;
229	0	return 1;
230	0	}
231		/* macctx->tls_data_size is datalen plus the padding length */
232	0	if (macctx->tls_data_size < datalen)
233	0	return 0;
234
235	0	return ssl3_cbc_digest_record(ossl_prov_digest_md(&macctx->digest),
236	0	macctx->tls_mac_out,
237	0	&macctx->tls_mac_out_size,
238	0	macctx->tls_header,
239	0	data,
240	0	datalen,
241	0	macctx->tls_data_size,
242	0	macctx->key,
243	0	macctx->keylen,
244	0	0);
245	0	}
246
247	0	return HMAC_Update(macctx->ctx, data, datalen);
248	0	}
249
250		static int hmac_final(void vmacctx, unsigned char out, size_t *outl,
251		size_t outsize)
252	0	{
253	0	unsigned int hlen;
254	0	struct hmac_data_st *macctx = vmacctx;
255
256	0	if (!ossl_prov_is_running())
257	0	return 0;
258	0	if (macctx->tls_data_size > 0) {
259	0	if (macctx->tls_mac_out_size == 0)
260	0	return 0;
261	0	if (outl != NULL)
262	0	*outl = macctx->tls_mac_out_size;
263	0	memcpy(out, macctx->tls_mac_out, macctx->tls_mac_out_size);
264	0	return 1;
265	0	}
266	0	if (!HMAC_Final(macctx->ctx, out, &hlen))
267	0	return 0;
268	0	*outl = hlen;
269	0	return 1;
270	0	}
271
272		static const OSSL_PARAM hmac_gettable_ctx_params(ossl_unused void ctx,
273		ossl_unused void *provctx)
274	0	{
275	0	return hmac_get_ctx_params_list;
276	0	}
277
278		static int hmac_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
279	0	{
280	0	struct hmac_data_st *macctx = vmacctx;
281	0	struct hmac_get_ctx_params_st p;
282
283	0	if (macctx == NULL \|\| !hmac_get_ctx_params_decoder(params, &p))
284	0	return 0;
285
286	0	if (p.size != NULL && !OSSL_PARAM_set_size_t(p.size, hmac_size(macctx)))
287	0	return 0;
288
289	0	if (p.bsize != NULL && !OSSL_PARAM_set_int(p.bsize, hmac_block_size(macctx)))
290	0	return 0;
291
292		#ifdef FIPS_MODULE
293		if (p.ind != NULL) {
294		int approved = 0;
295
296		if (!macctx->internal)
297		approved = OSSL_FIPS_IND_GET(macctx)->approved;
298		if (!OSSL_PARAM_set_int(p.ind, approved))
299		return 0;
300		}
301		#endif
302	0	return 1;
303	0	}
304
305		static const OSSL_PARAM hmac_settable_ctx_params(ossl_unused void ctx,
306		ossl_unused void *provctx)
307	0	{
308	0	return hmac_set_ctx_params_list;
309	0	}
310
311		/*
312		* ALL parameters should be set before init().
313		*/
314		static int hmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
315	0	{
316	0	struct hmac_data_st *macctx = vmacctx;
317	0	OSSL_LIB_CTX *ctx;
318	0	struct hmac_set_ctx_params_st p;
319
320	0	if (macctx == NULL \|\| !hmac_set_ctx_params_decoder(params, &p))
321	0	return 0;
322
323	0	ctx = PROV_LIBCTX_OF(macctx->provctx);
324
325	0	if (!OSSL_FIPS_IND_SET_CTX_FROM_PARAM(macctx, OSSL_FIPS_IND_SETTABLE0, p.ind_k))
326	0	return 0;
327
328	0	if (p.digest != NULL
329	0	&& !ossl_prov_digest_load(&macctx->digest, p.digest, p.propq,
330	0	p.engine, ctx))
331	0	return 0;
332
333	0	if (p.key != NULL) {
334	0	if (p.key->data_type != OSSL_PARAM_OCTET_STRING)
335	0	return 0;
336
337	0	if (!hmac_setkey(macctx, p.key->data, p.key->data_size))
338	0	return 0;
339	0	}
340
341	0	if (p.tlssize != NULL && !OSSL_PARAM_get_size_t(p.tlssize, &macctx->tls_data_size))
342	0	return 0;
343
344	0	return 1;
345	0	}
346
347		const OSSL_DISPATCH ossl_hmac_functions[] = {
348		{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_new },
349		{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
350		{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
351		{ OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
352		{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
353		{ OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
354		{ OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
355		(void (*)(void))hmac_gettable_ctx_params },
356		{ OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))hmac_get_ctx_params },
357		{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
358		(void (*)(void))hmac_settable_ctx_params },
359		{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))hmac_set_ctx_params },
360		OSSL_DISPATCH_END
361		};
362
363		#ifdef FIPS_MODULE
364		static OSSL_FUNC_mac_newctx_fn hmac_internal_new;
365
366		static void hmac_internal_new(void provctx)
367		{
368		struct hmac_data_st *macctx = hmac_new(provctx);
369
370		if (macctx != NULL)
371		macctx->internal = 1;
372		return macctx;
373		}
374
375		const OSSL_DISPATCH ossl_hmac_internal_functions[] = {
376		{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_internal_new },
377		{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
378		{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
379		{ OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
380		{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
381		{ OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
382		{ OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
383		(void (*)(void))hmac_gettable_ctx_params },
384		{ OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))hmac_get_ctx_params },
385		{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
386		(void (*)(void))hmac_settable_ctx_params },
387		{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))hmac_set_ctx_params },
388		OSSL_DISPATCH_END
389		};
390
391		#endif /* FIPS_MODULE */