/src/openssl30/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 "prov/implementations.h"
#include "prov/provider_ctx.h"
#include "prov/provider_util.h"
#include "prov/providercommon.h"

/*
 * 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;
};

/* Defined in ssl/s3_cbc.c */
int ssl3_cbc_digest_record(const EVP_MD *md,
    unsigned char *md_out,
    size_t *md_out_size,
    const unsigned char header[13],
    const unsigned char *data,
    size_t data_size,
    size_t data_plus_mac_plus_padding_size,
    const unsigned char *mac_secret,
    size_t mac_secret_length, char is_sslv3);

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;

    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;

    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, 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 known_gettable_ctx_params[] = {
    OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
    OSSL_PARAM_size_t(OSSL_MAC_PARAM_BLOCK_SIZE, NULL),
    OSSL_PARAM_END
};
static const OSSL_PARAM *hmac_gettable_ctx_params(ossl_unused void *ctx,
    ossl_unused void *provctx)
{
    return known_gettable_ctx_params;
}

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

    if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL
        && !OSSL_PARAM_set_size_t(p, hmac_size(macctx)))
        return 0;

    if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_BLOCK_SIZE)) != NULL
        && !OSSL_PARAM_set_int(p, hmac_block_size(macctx)))
        return 0;

    return 1;
}

static const OSSL_PARAM known_settable_ctx_params[] = {
    OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_DIGEST, NULL, 0),
    OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES, NULL, 0),
    OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
    OSSL_PARAM_int(OSSL_MAC_PARAM_DIGEST_NOINIT, NULL),
    OSSL_PARAM_int(OSSL_MAC_PARAM_DIGEST_ONESHOT, NULL),
    OSSL_PARAM_size_t(OSSL_MAC_PARAM_TLS_DATA_SIZE, NULL),
    OSSL_PARAM_END
};
static const OSSL_PARAM *hmac_settable_ctx_params(ossl_unused void *ctx,
    ossl_unused void *provctx)
{
    return known_settable_ctx_params;
}

static int set_flag(const OSSL_PARAM params[], const char *key, int mask,
    int *flags)
{
    const OSSL_PARAM *p = OSSL_PARAM_locate_const(params, key);
    int flag = 0;

    if (p != NULL) {
        if (!OSSL_PARAM_get_int(p, &flag))
            return 0;
        if (flag == 0)
            *flags &= ~mask;
        else
            *flags |= mask;
    }
    return 1;
}

/*
 * 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 = PROV_LIBCTX_OF(macctx->provctx);
    const OSSL_PARAM *p;
    int flags = 0;

    if (params == NULL)
        return 1;

    if (!ossl_prov_digest_load_from_params(&macctx->digest, params, ctx))
        return 0;

    if (!set_flag(params, OSSL_MAC_PARAM_DIGEST_NOINIT, EVP_MD_CTX_FLAG_NO_INIT,
            &flags))
        return 0;
    if (!set_flag(params, OSSL_MAC_PARAM_DIGEST_ONESHOT, EVP_MD_CTX_FLAG_ONESHOT,
            &flags))
        return 0;
    if (flags)
        HMAC_CTX_set_flags(macctx->ctx, flags);

    if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
        if (p->data_type != OSSL_PARAM_OCTET_STRING)
            return 0;
        if (!hmac_setkey(macctx, p->data, p->data_size))
            return 0;
    }

    if ((p = OSSL_PARAM_locate_const(params,
             OSSL_MAC_PARAM_TLS_DATA_SIZE))
        != NULL) {
        if (!OSSL_PARAM_get_size_t(p, &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 },
    { 0, NULL }
};

Coverage Report

Created: 2025-12-31 06:58

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
24		#include "prov/implementations.h"
25		#include "prov/provider_ctx.h"
26		#include "prov/provider_util.h"
27		#include "prov/providercommon.h"
28
29		/*
30		* Forward declaration of everything implemented here. This is not strictly
31		* necessary for the compiler, but provides an assurance that the signatures
32		* of the functions in the dispatch table are correct.
33		*/
34		static OSSL_FUNC_mac_newctx_fn hmac_new;
35		static OSSL_FUNC_mac_dupctx_fn hmac_dup;
36		static OSSL_FUNC_mac_freectx_fn hmac_free;
37		static OSSL_FUNC_mac_gettable_ctx_params_fn hmac_gettable_ctx_params;
38		static OSSL_FUNC_mac_get_ctx_params_fn hmac_get_ctx_params;
39		static OSSL_FUNC_mac_settable_ctx_params_fn hmac_settable_ctx_params;
40		static OSSL_FUNC_mac_set_ctx_params_fn hmac_set_ctx_params;
41		static OSSL_FUNC_mac_init_fn hmac_init;
42		static OSSL_FUNC_mac_update_fn hmac_update;
43		static OSSL_FUNC_mac_final_fn hmac_final;
44
45		/* local HMAC context structure */
46
47		/* typedef EVP_MAC_IMPL */
48		struct hmac_data_st {
49		void *provctx;
50		HMAC_CTX ctx; / HMAC context */
51		PROV_DIGEST digest;
52		unsigned char *key;
53		size_t keylen;
54		/* Length of full TLS record including the MAC and any padding */
55		size_t tls_data_size;
56		unsigned char tls_header[13];
57		int tls_header_set;
58		unsigned char tls_mac_out[EVP_MAX_MD_SIZE];
59		size_t tls_mac_out_size;
60		};
61
62		/* Defined in ssl/s3_cbc.c */
63		int ssl3_cbc_digest_record(const EVP_MD *md,
64		unsigned char *md_out,
65		size_t *md_out_size,
66		const unsigned char header[13],
67		const unsigned char *data,
68		size_t data_size,
69		size_t data_plus_mac_plus_padding_size,
70		const unsigned char *mac_secret,
71		size_t mac_secret_length, char is_sslv3);
72
73		static void hmac_new(void provctx)
74	1.68M	{
75	1.68M	struct hmac_data_st *macctx;
76
77	1.68M	if (!ossl_prov_is_running())
78	0	return NULL;
79
80	1.68M	if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
81	1.68M	\|\| (macctx->ctx = HMAC_CTX_new()) == NULL) {
82	0	OPENSSL_free(macctx);
83	0	return NULL;
84	0	}
85	1.68M	macctx->provctx = provctx;
86
87	1.68M	return macctx;
88	1.68M	}
89
90		static void hmac_free(void *vmacctx)
91	1.68M	{
92	1.68M	struct hmac_data_st *macctx = vmacctx;
93
94	1.68M	if (macctx != NULL) {
95	1.68M	HMAC_CTX_free(macctx->ctx);
96	1.68M	ossl_prov_digest_reset(&macctx->digest);
97	1.68M	OPENSSL_clear_free(macctx->key, macctx->keylen);
98	1.68M	OPENSSL_free(macctx);
99	1.68M	}
100	1.68M	}
101
102		static void hmac_dup(void vsrc)
103	1.41M	{
104	1.41M	struct hmac_data_st *src = vsrc;
105	1.41M	struct hmac_data_st *dst;
106	1.41M	HMAC_CTX *ctx;
107
108	1.41M	if (!ossl_prov_is_running())
109	0	return NULL;
110	1.41M	dst = hmac_new(src->provctx);
111	1.41M	if (dst == NULL)
112	0	return NULL;
113
114	1.41M	ctx = dst->ctx;
115	1.41M	dst = src;
116	1.41M	dst->ctx = ctx;
117	1.41M	dst->key = NULL;
118	1.41M	memset(&dst->digest, 0, sizeof(dst->digest));
119
120	1.41M	if (!HMAC_CTX_copy(dst->ctx, src->ctx)
121	1.41M	\|\| !ossl_prov_digest_copy(&dst->digest, &src->digest)) {
122	0	hmac_free(dst);
123	0	return NULL;
124	0	}
125	1.41M	if (src->key != NULL) {
126	1.41M	dst->key = OPENSSL_malloc(src->keylen > 0 ? src->keylen : 1);
127	1.41M	if (dst->key == NULL) {
128	0	hmac_free(dst);
129	0	return 0;
130	0	}
131	1.41M	if (src->keylen > 0)
132	1.41M	memcpy(dst->key, src->key, src->keylen);
133	1.41M	}
134	1.41M	return dst;
135	1.41M	}
136
137		static size_t hmac_size(struct hmac_data_st *macctx)
138	1.21M	{
139	1.21M	return HMAC_size(macctx->ctx);
140	1.21M	}
141
142		static int hmac_block_size(struct hmac_data_st *macctx)
143	0	{
144	0	const EVP_MD *md = ossl_prov_digest_md(&macctx->digest);
145
146	0	if (md == NULL)
147	0	return 0;
148	0	return EVP_MD_block_size(md);
149	0	}
150
151		static int hmac_setkey(struct hmac_data_st *macctx,
152		const unsigned char *key, size_t keylen)
153	287k	{
154	287k	const EVP_MD *digest;
155
156	287k	if (macctx->key != NULL)
157	23.7k	OPENSSL_clear_free(macctx->key, macctx->keylen);
158		/* Keep a copy of the key in case we need it for TLS HMAC */
159	287k	macctx->key = OPENSSL_malloc(keylen > 0 ? keylen : 1);
160	287k	if (macctx->key == NULL)
161	0	return 0;
162
163	287k	if (keylen > 0)
164	280k	memcpy(macctx->key, key, keylen);
165	287k	macctx->keylen = keylen;
166
167	287k	digest = ossl_prov_digest_md(&macctx->digest);
168		/* HMAC_Init_ex doesn't tolerate all zero params, so we must be careful */
169	287k	if (key != NULL \|\| (macctx->tls_data_size == 0 && digest != NULL))
170	287k	return HMAC_Init_ex(macctx->ctx, key, keylen, digest,
171	287k	ossl_prov_digest_engine(&macctx->digest));
172	0	return 1;
173	287k	}
174
175		static int hmac_init(void vmacctx, const unsigned char key,
176		size_t keylen, const OSSL_PARAM params[])
177	286k	{
178	286k	struct hmac_data_st *macctx = vmacctx;
179
180	286k	if (!ossl_prov_is_running() \|\| !hmac_set_ctx_params(macctx, params))
181	174	return 0;
182
183	286k	if (key != NULL)
184	286k	return hmac_setkey(macctx, key, keylen);
185
186		/* Just reinit the HMAC context */
187	0	return HMAC_Init_ex(macctx->ctx, NULL, 0, NULL, NULL);
188	286k	}
189
190		static int hmac_update(void vmacctx, const unsigned char data,
191		size_t datalen)
192	1.68M	{
193	1.68M	struct hmac_data_st *macctx = vmacctx;
194
195	1.68M	if (macctx->tls_data_size > 0) {
196		/* We're doing a TLS HMAC */
197	327k	if (!macctx->tls_header_set) {
198		/* We expect the first update call to contain the TLS header */
199	163k	if (datalen != sizeof(macctx->tls_header))
200	123	return 0;
201	163k	memcpy(macctx->tls_header, data, datalen);
202	163k	macctx->tls_header_set = 1;
203	163k	return 1;
204	163k	}
205		/* macctx->tls_data_size is datalen plus the padding length */
206	163k	if (macctx->tls_data_size < datalen)
207	0	return 0;
208
209	163k	return ssl3_cbc_digest_record(ossl_prov_digest_md(&macctx->digest),
210	163k	macctx->tls_mac_out,
211	163k	&macctx->tls_mac_out_size,
212	163k	macctx->tls_header,
213	163k	data,
214	163k	datalen,
215	163k	macctx->tls_data_size,
216	163k	macctx->key,
217	163k	macctx->keylen,
218	163k	0);
219	163k	}
220
221	1.36M	return HMAC_Update(macctx->ctx, data, datalen);
222	1.68M	}
223
224		static int hmac_final(void vmacctx, unsigned char out, size_t *outl,
225		size_t outsize)
226	1.12M	{
227	1.12M	unsigned int hlen;
228	1.12M	struct hmac_data_st *macctx = vmacctx;
229
230	1.12M	if (!ossl_prov_is_running())
231	0	return 0;
232	1.12M	if (macctx->tls_data_size > 0) {
233	163k	if (macctx->tls_mac_out_size == 0)
234	0	return 0;
235	163k	if (outl != NULL)
236	163k	*outl = macctx->tls_mac_out_size;
237	163k	memcpy(out, macctx->tls_mac_out, macctx->tls_mac_out_size);
238	163k	return 1;
239	163k	}
240	960k	if (!HMAC_Final(macctx->ctx, out, &hlen))
241	0	return 0;
242	960k	*outl = hlen;
243	960k	return 1;
244	960k	}
245
246		static const OSSL_PARAM known_gettable_ctx_params[] = {
247		OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
248		OSSL_PARAM_size_t(OSSL_MAC_PARAM_BLOCK_SIZE, NULL),
249		OSSL_PARAM_END
250		};
251		static const OSSL_PARAM hmac_gettable_ctx_params(ossl_unused void ctx,
252		ossl_unused void *provctx)
253	0	{
254	0	return known_gettable_ctx_params;
255	0	}
256
257		static int hmac_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
258	769k	{
259	769k	struct hmac_data_st *macctx = vmacctx;
260	769k	OSSL_PARAM *p;
261
262	769k	if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL
263	769k	&& !OSSL_PARAM_set_size_t(p, hmac_size(macctx)))
264	0	return 0;
265
266	769k	if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_BLOCK_SIZE)) != NULL
267	0	&& !OSSL_PARAM_set_int(p, hmac_block_size(macctx)))
268	0	return 0;
269
270	769k	return 1;
271	769k	}
272
273		static const OSSL_PARAM known_settable_ctx_params[] = {
274		OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_DIGEST, NULL, 0),
275		OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES, NULL, 0),
276		OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
277		OSSL_PARAM_int(OSSL_MAC_PARAM_DIGEST_NOINIT, NULL),
278		OSSL_PARAM_int(OSSL_MAC_PARAM_DIGEST_ONESHOT, NULL),
279		OSSL_PARAM_size_t(OSSL_MAC_PARAM_TLS_DATA_SIZE, NULL),
280		OSSL_PARAM_END
281		};
282		static const OSSL_PARAM hmac_settable_ctx_params(ossl_unused void ctx,
283		ossl_unused void *provctx)
284	152k	{
285	152k	return known_settable_ctx_params;
286	152k	}
287
288		static int set_flag(const OSSL_PARAM params[], const char *key, int mask,
289		int *flags)
290	22.5k	{
291	22.5k	const OSSL_PARAM *p = OSSL_PARAM_locate_const(params, key);
292	22.5k	int flag = 0;
293
294	22.5k	if (p != NULL) {
295	0	if (!OSSL_PARAM_get_int(p, &flag))
296	0	return 0;
297	0	if (flag == 0)
298	0	*flags &= ~mask;
299	0	else
300	0	*flags \|= mask;
301	0	}
302	22.5k	return 1;
303	22.5k	}
304
305		/*
306		* ALL parameters should be set before init().
307		*/
308		static int hmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
309	22.4k	{
310	22.4k	struct hmac_data_st *macctx = vmacctx;
311	22.4k	OSSL_LIB_CTX *ctx = PROV_LIBCTX_OF(macctx->provctx);
312	22.4k	const OSSL_PARAM *p;
313	22.4k	int flags = 0;
314
315	22.4k	if (params == NULL)
316	11.1k	return 1;
317
318	11.2k	if (!ossl_prov_digest_load_from_params(&macctx->digest, params, ctx))
319	3	return 0;
320
321	11.2k	if (!set_flag(params, OSSL_MAC_PARAM_DIGEST_NOINIT, EVP_MD_CTX_FLAG_NO_INIT,
322	11.2k	&flags))
323	0	return 0;
324	11.2k	if (!set_flag(params, OSSL_MAC_PARAM_DIGEST_ONESHOT, EVP_MD_CTX_FLAG_ONESHOT,
325	11.2k	&flags))
326	0	return 0;
327	11.2k	if (flags)
328	0	HMAC_CTX_set_flags(macctx->ctx, flags);
329
330	11.2k	if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
331	0	if (p->data_type != OSSL_PARAM_OCTET_STRING)
332	0	return 0;
333	0	if (!hmac_setkey(macctx, p->data, p->data_size))
334	0	return 0;
335	0	}
336
337	11.2k	if ((p = OSSL_PARAM_locate_const(params,
338	11.2k	OSSL_MAC_PARAM_TLS_DATA_SIZE))
339	11.2k	!= NULL) {
340	179	if (!OSSL_PARAM_get_size_t(p, &macctx->tls_data_size))
341	0	return 0;
342	179	}
343	11.2k	return 1;
344	11.2k	}
345
346		const OSSL_DISPATCH ossl_hmac_functions[] = {
347		{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_new },
348		{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
349		{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
350		{ OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
351		{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
352		{ OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
353		{ OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
354		(void (*)(void))hmac_gettable_ctx_params },
355		{ OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))hmac_get_ctx_params },
356		{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
357		(void (*)(void))hmac_settable_ctx_params },
358		{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))hmac_set_ctx_params },
359		{ 0, NULL }
360		};