/src/openssl31/providers/implementations/macs/hmac_prov.c

Source (jump to first uncovered line)
/*
 * Copyright 2018-2022 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_secure_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) {
        /* There is no "secure" OPENSSL_memdup */
        dst->key = OPENSSL_secure_malloc(src->keylen > 0 ? src->keylen : 1);
        if (dst->key == NULL) {
            hmac_free(dst);
            return 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_secure_clear_free(macctx->key, macctx->keylen);
    /* Keep a copy of the key in case we need it for TLS HMAC */
    macctx->key = OPENSSL_secure_malloc(keylen > 0 ? keylen : 1);
    if (macctx->key == NULL)
        return 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: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2018-2022 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	639k	{
75	639k	struct hmac_data_st *macctx;
76
77	639k	if (!ossl_prov_is_running())
78	0	return NULL;
79
80	639k	if ((macctx = OPENSSL_zalloc(sizeof(*macctx))) == NULL
81	639k	\|\| (macctx->ctx = HMAC_CTX_new()) == NULL) {
82	0	OPENSSL_free(macctx);
83	0	return NULL;
84	0	}
85	639k	macctx->provctx = provctx;
86
87	639k	return macctx;
88	639k	}
89
90		static void hmac_free(void *vmacctx)
91	639k	{
92	639k	struct hmac_data_st *macctx = vmacctx;
93
94	639k	if (macctx != NULL) {
95	639k	HMAC_CTX_free(macctx->ctx);
96	639k	ossl_prov_digest_reset(&macctx->digest);
97	639k	OPENSSL_secure_clear_free(macctx->key, macctx->keylen);
98	639k	OPENSSL_free(macctx);
99	639k	}
100	639k	}
101
102		static void hmac_dup(void vsrc)
103	523k	{
104	523k	struct hmac_data_st *src = vsrc;
105	523k	struct hmac_data_st *dst;
106	523k	HMAC_CTX *ctx;
107
108	523k	if (!ossl_prov_is_running())
109	0	return NULL;
110	523k	dst = hmac_new(src->provctx);
111	523k	if (dst == NULL)
112	0	return NULL;
113
114	523k	ctx = dst->ctx;
115	523k	dst = src;
116	523k	dst->ctx = ctx;
117	523k	dst->key = NULL;
118	523k	memset(&dst->digest, 0, sizeof(dst->digest));
119
120	523k	if (!HMAC_CTX_copy(dst->ctx, src->ctx)
121	523k	\|\| !ossl_prov_digest_copy(&dst->digest, &src->digest)) {
122	0	hmac_free(dst);
123	0	return NULL;
124	0	}
125	523k	if (src->key != NULL) {
126		/* There is no "secure" OPENSSL_memdup */
127	523k	dst->key = OPENSSL_secure_malloc(src->keylen > 0 ? src->keylen : 1);
128	523k	if (dst->key == NULL) {
129	0	hmac_free(dst);
130	0	return 0;
131	0	}
132	523k	memcpy(dst->key, src->key, src->keylen);
133	523k	}
134	523k	return dst;
135	523k	}
136
137		static size_t hmac_size(struct hmac_data_st *macctx)
138	460k	{
139	460k	return HMAC_size(macctx->ctx);
140	460k	}
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	118k	{
154	118k	const EVP_MD *digest;
155
156	118k	if (macctx->key != NULL)
157	4.16k	OPENSSL_secure_clear_free(macctx->key, macctx->keylen);
158		/* Keep a copy of the key in case we need it for TLS HMAC */
159	118k	macctx->key = OPENSSL_secure_malloc(keylen > 0 ? keylen : 1);
160	118k	if (macctx->key == NULL)
161	0	return 0;
162	118k	memcpy(macctx->key, key, keylen);
163	118k	macctx->keylen = keylen;
164
165	118k	digest = ossl_prov_digest_md(&macctx->digest);
166		/* HMAC_Init_ex doesn't tolerate all zero params, so we must be careful */
167	118k	if (key != NULL \|\| (macctx->tls_data_size == 0 && digest != NULL))
168	118k	return HMAC_Init_ex(macctx->ctx, key, keylen, digest,
169	118k	ossl_prov_digest_engine(&macctx->digest));
170	0	return 1;
171	118k	}
172
173		static int hmac_init(void vmacctx, const unsigned char key,
174		size_t keylen, const OSSL_PARAM params[])
175	118k	{
176	118k	struct hmac_data_st *macctx = vmacctx;
177
178	118k	if (!ossl_prov_is_running() \|\| !hmac_set_ctx_params(macctx, params))
179	57	return 0;
180
181	118k	if (key != NULL)
182	118k	return hmac_setkey(macctx, key, keylen);
183
184		/* Just reinit the HMAC context */
185	0	return HMAC_Init_ex(macctx->ctx, NULL, 0, NULL, NULL);
186	118k	}
187
188		static int hmac_update(void vmacctx, const unsigned char data,
189		size_t datalen)
190	636k	{
191	636k	struct hmac_data_st *macctx = vmacctx;
192
193	636k	if (macctx->tls_data_size > 0) {
194		/* We're doing a TLS HMAC */
195	75.0k	if (!macctx->tls_header_set) {
196		/* We expect the first update call to contain the TLS header */
197	37.5k	if (datalen != sizeof(macctx->tls_header))
198	10	return 0;
199	37.5k	memcpy(macctx->tls_header, data, datalen);
200	37.5k	macctx->tls_header_set = 1;
201	37.5k	return 1;
202	37.5k	}
203		/* macctx->tls_data_size is datalen plus the padding length */
204	37.5k	if (macctx->tls_data_size < datalen)
205	0	return 0;
206
207	37.5k	return ssl3_cbc_digest_record(ossl_prov_digest_md(&macctx->digest),
208	37.5k	macctx->tls_mac_out,
209	37.5k	&macctx->tls_mac_out_size,
210	37.5k	macctx->tls_header,
211	37.5k	data,
212	37.5k	datalen,
213	37.5k	macctx->tls_data_size,
214	37.5k	macctx->key,
215	37.5k	macctx->keylen,
216	37.5k	0);
217	37.5k	}
218
219	561k	return HMAC_Update(macctx->ctx, data, datalen);
220	636k	}
221
222		static int hmac_final(void vmacctx, unsigned char out, size_t *outl,
223		size_t outsize)
224	424k	{
225	424k	unsigned int hlen;
226	424k	struct hmac_data_st *macctx = vmacctx;
227
228	424k	if (!ossl_prov_is_running())
229	0	return 0;
230	424k	if (macctx->tls_data_size > 0) {
231	37.5k	if (macctx->tls_mac_out_size == 0)
232	0	return 0;
233	37.5k	if (outl != NULL)
234	37.5k	*outl = macctx->tls_mac_out_size;
235	37.5k	memcpy(out, macctx->tls_mac_out, macctx->tls_mac_out_size);
236	37.5k	return 1;
237	37.5k	}
238	386k	if (!HMAC_Final(macctx->ctx, out, &hlen))
239	0	return 0;
240	386k	*outl = hlen;
241	386k	return 1;
242	386k	}
243
244		static const OSSL_PARAM known_gettable_ctx_params[] = {
245		OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
246		OSSL_PARAM_size_t(OSSL_MAC_PARAM_BLOCK_SIZE, NULL),
247		OSSL_PARAM_END
248		};
249		static const OSSL_PARAM hmac_gettable_ctx_params(ossl_unused void ctx,
250		ossl_unused void *provctx)
251	0	{
252	0	return known_gettable_ctx_params;
253	0	}
254
255		static int hmac_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
256	460k	{
257	460k	struct hmac_data_st *macctx = vmacctx;
258	460k	OSSL_PARAM *p;
259
260	460k	if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL
261	460k	&& !OSSL_PARAM_set_size_t(p, hmac_size(macctx)))
262	0	return 0;
263
264	460k	if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_BLOCK_SIZE)) != NULL
265	460k	&& !OSSL_PARAM_set_int(p, hmac_block_size(macctx)))
266	0	return 0;
267
268	460k	return 1;
269	460k	}
270
271		static const OSSL_PARAM known_settable_ctx_params[] = {
272		OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_DIGEST, NULL, 0),
273		OSSL_PARAM_utf8_string(OSSL_MAC_PARAM_PROPERTIES, NULL, 0),
274		OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
275		OSSL_PARAM_int(OSSL_MAC_PARAM_DIGEST_NOINIT, NULL),
276		OSSL_PARAM_int(OSSL_MAC_PARAM_DIGEST_ONESHOT, NULL),
277		OSSL_PARAM_size_t(OSSL_MAC_PARAM_TLS_DATA_SIZE, NULL),
278		OSSL_PARAM_END
279		};
280		static const OSSL_PARAM hmac_settable_ctx_params(ossl_unused void ctx,
281		ossl_unused void *provctx)
282	70.9k	{
283	70.9k	return known_settable_ctx_params;
284	70.9k	}
285
286		static int set_flag(const OSSL_PARAM params[], const char *key, int mask,
287		int *flags)
288	156k	{
289	156k	const OSSL_PARAM *p = OSSL_PARAM_locate_const(params, key);
290	156k	int flag = 0;
291
292	156k	if (p != NULL) {
293	0	if (!OSSL_PARAM_get_int(p, &flag))
294	0	return 0;
295	0	if (flag == 0)
296	0	*flags &= ~mask;
297	0	else
298	0	*flags \|= mask;
299	0	}
300	156k	return 1;
301	156k	}
302
303		/*
304		* ALL parameters should be set before init().
305		*/
306		static int hmac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
307	163k	{
308	163k	struct hmac_data_st *macctx = vmacctx;
309	163k	OSSL_LIB_CTX *ctx = PROV_LIBCTX_OF(macctx->provctx);
310	163k	const OSSL_PARAM *p;
311	163k	int flags = 0;
312
313	163k	if (params == NULL)
314	85.1k	return 1;
315
316	78.1k	if (!ossl_prov_digest_load_from_params(&macctx->digest, params, ctx))
317	3	return 0;
318
319	78.1k	if (!set_flag(params, OSSL_MAC_PARAM_DIGEST_NOINIT, EVP_MD_CTX_FLAG_NO_INIT,
320	78.1k	&flags))
321	0	return 0;
322	78.1k	if (!set_flag(params, OSSL_MAC_PARAM_DIGEST_ONESHOT, EVP_MD_CTX_FLAG_ONESHOT,
323	78.1k	&flags))
324	0	return 0;
325	78.1k	if (flags)
326	0	HMAC_CTX_set_flags(macctx->ctx, flags);
327
328	78.1k	if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL) {
329	0	if (p->data_type != OSSL_PARAM_OCTET_STRING)
330	0	return 0;
331	0	if (!hmac_setkey(macctx, p->data, p->data_size))
332	0	return 0;
333	0	}
334
335	78.1k	if ((p = OSSL_PARAM_locate_const(params,
336	78.1k	OSSL_MAC_PARAM_TLS_DATA_SIZE)) != NULL) {
337	441	if (!OSSL_PARAM_get_size_t(p, &macctx->tls_data_size))
338	0	return 0;
339	441	}
340	78.1k	return 1;
341	78.1k	}
342
343		const OSSL_DISPATCH ossl_hmac_functions[] = {
344		{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))hmac_new },
345		{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))hmac_dup },
346		{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))hmac_free },
347		{ OSSL_FUNC_MAC_INIT, (void (*)(void))hmac_init },
348		{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))hmac_update },
349		{ OSSL_FUNC_MAC_FINAL, (void (*)(void))hmac_final },
350		{ OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
351		(void (*)(void))hmac_gettable_ctx_params },
352		{ OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))hmac_get_ctx_params },
353		{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
354		(void (*)(void))hmac_settable_ctx_params },
355		{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))hmac_set_ctx_params },
356		{ 0, NULL }
357		};