/src/openssl/providers/implementations/signature/slh_dsa_sig.c

Source
/*
 * Copyright 2024-2025 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
 */

#include <openssl/core_names.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/proverr.h>
#include <openssl/self_test.h>
#include "prov/implementations.h"
#include "prov/providercommon.h"
#include "prov/provider_ctx.h"
#include "prov/der_slh_dsa.h"
#include "crypto/slh_dsa.h"
#include "internal/cryptlib.h"
#include "internal/sizes.h"
#include "internal/fips.h"
#include "providers/implementations/signature/slh_dsa_sig.inc"

#define SLH_DSA_MAX_ADD_RANDOM_LEN 32

#define SLH_DSA_MESSAGE_ENCODE_RAW  0
#define SLH_DSA_MESSAGE_ENCODE_PURE 1

static OSSL_FUNC_signature_sign_message_init_fn slh_dsa_sign_msg_init;
static OSSL_FUNC_signature_sign_fn slh_dsa_sign;
static OSSL_FUNC_signature_verify_message_init_fn slh_dsa_verify_msg_init;
static OSSL_FUNC_signature_verify_fn slh_dsa_verify;
static OSSL_FUNC_signature_digest_sign_init_fn slh_dsa_digest_signverify_init;
static OSSL_FUNC_signature_digest_sign_fn slh_dsa_digest_sign;
static OSSL_FUNC_signature_digest_verify_fn slh_dsa_digest_verify;
static OSSL_FUNC_signature_freectx_fn slh_dsa_freectx;
static OSSL_FUNC_signature_dupctx_fn slh_dsa_dupctx;
static OSSL_FUNC_signature_set_ctx_params_fn slh_dsa_set_ctx_params;
static OSSL_FUNC_signature_settable_ctx_params_fn slh_dsa_settable_ctx_params;

#ifdef FIPS_MODULE
static FIPS_DEFERRED_TEST slh_sig_deferred_tests[] = {
    {
        "SLH-DSA-SHA2-128f",
        FIPS_DEFERRED_KAT_SIGNATURE,
        FIPS_DEFERRED_TEST_INIT
    },
    {
        "SLH-DSA-SHAKE-128f",
        FIPS_DEFERRED_KAT_SIGNATURE,
        FIPS_DEFERRED_TEST_INIT
    },
    { NULL, 0, 0 },
};
#endif

static int slh_dsa_self_check(OSSL_LIB_CTX *libctx)
{
    if (!ossl_prov_is_running())
        return 0;

#ifdef FIPS_MODULE
    return FIPS_deferred_self_tests(libctx, slh_sig_deferred_tests);
#else
    return 1;
#endif
}

/*
 * NOTE: Any changes to this structure may require updating slh_dsa_dupctx().
 */
typedef struct {
    SLH_DSA_KEY *key; /* Note that the key is not owned by this object */
    SLH_DSA_HASH_CTX *hash_ctx;
    uint8_t context_string[SLH_DSA_MAX_CONTEXT_STRING_LEN];
    size_t context_string_len;
    uint8_t add_random[SLH_DSA_MAX_ADD_RANDOM_LEN];
    size_t add_random_len;
    int msg_encode;
    int deterministic;
    OSSL_LIB_CTX *libctx;
    char *propq;
    const char *alg;
    /* The Algorithm Identifier of the signature algorithm */
    uint8_t aid_buf[OSSL_MAX_ALGORITHM_ID_SIZE];
    size_t  aid_len;
} PROV_SLH_DSA_CTX;

static void slh_dsa_freectx(void *vctx)
{
    PROV_SLH_DSA_CTX *ctx = (PROV_SLH_DSA_CTX *)vctx;

    ossl_slh_dsa_hash_ctx_free(ctx->hash_ctx);
    OPENSSL_free(ctx->propq);
    OPENSSL_cleanse(ctx->add_random, ctx->add_random_len);
    OPENSSL_free(ctx);
}

static void *slh_dsa_newctx(void *provctx, const char *alg, const char *propq)
{
    PROV_SLH_DSA_CTX *ctx;

    if (!slh_dsa_self_check(PROV_LIBCTX_OF(provctx)))
        return NULL;

    ctx = OPENSSL_zalloc(sizeof(PROV_SLH_DSA_CTX));
    if (ctx == NULL)
        return NULL;

    ctx->libctx = PROV_LIBCTX_OF(provctx);
    if (propq != NULL && (ctx->propq = OPENSSL_strdup(propq)) == NULL)
        goto err;
    ctx->alg = alg;
    ctx->msg_encode = SLH_DSA_MESSAGE_ENCODE_PURE;
    return ctx;
 err:
    slh_dsa_freectx(ctx);
    return NULL;
}

static void *slh_dsa_dupctx(void *vctx)
{
    PROV_SLH_DSA_CTX *src = (PROV_SLH_DSA_CTX *)vctx;
    PROV_SLH_DSA_CTX *ret;

    if (!ossl_prov_is_running())
        return NULL;

    /*
     * Note that the SLH_DSA_KEY is ref counted via EVP_PKEY so we can just copy
     * the key here.
     */
    ret = OPENSSL_memdup(src, sizeof(*src));
    if (ret == NULL)
        return NULL;
    ret->propq = NULL;
    ret->hash_ctx = NULL;
    if (src->propq != NULL && (ret->propq = OPENSSL_strdup(src->propq)) == NULL)
        goto err;
    ret->hash_ctx = ossl_slh_dsa_hash_ctx_dup(src->hash_ctx);
    if (ret->hash_ctx == NULL)
        goto err;

    return ret;
 err:
    slh_dsa_freectx(ret);
    return NULL;
}

static int slh_dsa_set_alg_id_buffer(PROV_SLH_DSA_CTX *ctx)
{
    int ret;
    WPACKET pkt;
    uint8_t *aid = NULL;

    /*
     * We do not care about DER writing errors.
     * All it really means is that for some reason, there's no
     * AlgorithmIdentifier to be had, but the operation itself is
     * still valid, just as long as it's not used to construct
     * anything that needs an AlgorithmIdentifier.
     */
    ctx->aid_len = 0;
    ret = WPACKET_init_der(&pkt, ctx->aid_buf, sizeof(ctx->aid_buf));
    ret = ret && ossl_DER_w_algorithmIdentifier_SLH_DSA(&pkt, -1, ctx->key);
    if (ret && WPACKET_finish(&pkt)) {
        WPACKET_get_total_written(&pkt, &ctx->aid_len);
        aid = WPACKET_get_curr(&pkt);
    }
    WPACKET_cleanup(&pkt);
    if (aid != NULL && ctx->aid_len != 0)
        memmove(ctx->aid_buf, aid, ctx->aid_len);
    return 1;
}

static int slh_dsa_signverify_msg_init(void *vctx, void *vkey,
                                       const OSSL_PARAM params[], int operation,
                                       const char *desc)
{
    PROV_SLH_DSA_CTX *ctx = (PROV_SLH_DSA_CTX *)vctx;
    SLH_DSA_KEY *key = vkey;

    if (!ossl_prov_is_running()
            || ctx == NULL)
        return 0;

    if (vkey == NULL && ctx->key == NULL) {
        ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
        return 0;
    }

    if (key != NULL) {
        if (!ossl_slh_dsa_key_type_matches(key, ctx->alg))
            return 0;
        ctx->hash_ctx = ossl_slh_dsa_hash_ctx_new(key);
        if (ctx->hash_ctx == NULL)
            return 0;
        ctx->key = vkey;
    }

    slh_dsa_set_alg_id_buffer(ctx);
    if (!slh_dsa_set_ctx_params(ctx, params))
        return 0;
    return 1;
}

static int slh_dsa_sign_msg_init(void *vctx, void *vkey, const OSSL_PARAM params[])
{
    return slh_dsa_signverify_msg_init(vctx, vkey, params,
                                       EVP_PKEY_OP_SIGN, "SLH_DSA Sign Init");
}

static int slh_dsa_digest_signverify_init(void *vctx, const char *mdname,
                                          void *vkey, const OSSL_PARAM params[])
{
    PROV_SLH_DSA_CTX *ctx = (PROV_SLH_DSA_CTX *)vctx;

    if (mdname != NULL && mdname[0] != '\0') {
        ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
                       "Explicit digest not supported for SLH-DSA operations");
        return 0;
    }

    if (vkey == NULL && ctx->key != NULL)
        return slh_dsa_set_ctx_params(ctx, params);

    return slh_dsa_signverify_msg_init(vctx, vkey, params,
                                       EVP_PKEY_OP_SIGN, "SLH_DSA Sign Init");
}

static int slh_dsa_sign(void *vctx, unsigned char *sig, size_t *siglen,
                        size_t sigsize, const unsigned char *msg, size_t msg_len)
{
    int ret = 0;
    PROV_SLH_DSA_CTX *ctx = (PROV_SLH_DSA_CTX *)vctx;
    uint8_t add_rand[SLH_DSA_MAX_ADD_RANDOM_LEN], *opt_rand = NULL;
    size_t n = 0;

    if (!ossl_prov_is_running())
        return 0;

    if (sig != NULL) {
        if (ctx->add_random_len != 0) {
            opt_rand = ctx->add_random;
        } else if (ctx->deterministic == 0) {
            n = ossl_slh_dsa_key_get_n(ctx->key);
            if (RAND_priv_bytes_ex(ctx->libctx, add_rand, n, 0) <= 0)
                return 0;
            opt_rand = add_rand;
        }
    }
    ret = ossl_slh_dsa_sign(ctx->hash_ctx, msg, msg_len,
                            ctx->context_string, ctx->context_string_len,
                            opt_rand, ctx->msg_encode,
                            sig, siglen, sigsize);
    if (opt_rand != add_rand)
        OPENSSL_cleanse(opt_rand, n);
    return ret;
}

static int slh_dsa_digest_sign(void *vctx, uint8_t *sig, size_t *siglen, size_t sigsize,
                               const uint8_t *tbs, size_t tbslen)
{
    return slh_dsa_sign(vctx, sig, siglen, sigsize, tbs, tbslen);
}

static int slh_dsa_verify_msg_init(void *vctx, void *vkey, const OSSL_PARAM params[])
{
    return slh_dsa_signverify_msg_init(vctx, vkey, params, EVP_PKEY_OP_VERIFY,
                                       "SLH_DSA Verify Init");
}

static int slh_dsa_verify(void *vctx, const uint8_t *sig, size_t siglen,
                          const uint8_t *msg, size_t msg_len)
{
    PROV_SLH_DSA_CTX *ctx = (PROV_SLH_DSA_CTX *)vctx;

    if (!ossl_prov_is_running())
        return 0;
    return ossl_slh_dsa_verify(ctx->hash_ctx, msg, msg_len,
                               ctx->context_string, ctx->context_string_len,
                               ctx->msg_encode, sig, siglen);
}
static int slh_dsa_digest_verify(void *vctx, const uint8_t *sig, size_t siglen,
                                 const uint8_t *tbs, size_t tbslen)
{
    return slh_dsa_verify(vctx, sig, siglen, tbs, tbslen);
}

static int slh_dsa_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
    PROV_SLH_DSA_CTX *pctx = (PROV_SLH_DSA_CTX *)vctx;
    struct slh_dsa_set_ctx_params_st p;

    if (pctx == NULL || !slh_dsa_set_ctx_params_decoder(params, &p))
        return 0;

    if (p.context != NULL) {
        void *vp = pctx->context_string;

        if (!OSSL_PARAM_get_octet_string(p.context, &vp,
                                         sizeof(pctx->context_string),
                                         &(pctx->context_string_len))) {
            pctx->context_string_len = 0;
            return 0;
        }
    }

    if (p.entropy != NULL) {
        void *vp = pctx->add_random;
        size_t n = ossl_slh_dsa_key_get_n(pctx->key);

        if (!OSSL_PARAM_get_octet_string(p.entropy, &vp, n, &(pctx->add_random_len))
                || pctx->add_random_len != n) {
            pctx->add_random_len = 0;
            return 0;
        }
    }

    if (p.det != NULL && !OSSL_PARAM_get_int(p.det, &pctx->deterministic))
        return 0;

    if (p.msgenc != NULL && !OSSL_PARAM_get_int(p.msgenc, &pctx->msg_encode))
        return 0;
    return 1;
}

static const OSSL_PARAM *slh_dsa_settable_ctx_params(void *vctx,
                                                     ossl_unused void *provctx)
{
    return slh_dsa_set_ctx_params_list;
}

static const OSSL_PARAM *slh_dsa_gettable_ctx_params(ossl_unused void *vctx,
                                                     ossl_unused void *provctx)
{
    return slh_dsa_get_ctx_params_list;
}

static int slh_dsa_get_ctx_params(void *vctx, OSSL_PARAM *params)
{
    PROV_SLH_DSA_CTX *ctx = (PROV_SLH_DSA_CTX *)vctx;
    struct slh_dsa_get_ctx_params_st p;

    if (ctx == NULL || !slh_dsa_get_ctx_params_decoder(params, &p))
        return 0;

    if (p.algid != NULL
        && !OSSL_PARAM_set_octet_string(p.algid,
                                        ctx->aid_len == 0 ? NULL : ctx->aid_buf,
                                        ctx->aid_len))
        return 0;

    return 1;
}

#define MAKE_SIGNATURE_FUNCTIONS(alg, fn)                                      \
    static OSSL_FUNC_signature_newctx_fn slh_dsa_##fn##_newctx;                \
    static void *slh_dsa_##fn##_newctx(void *provctx, const char *propq)       \
    {                                                                          \
        return slh_dsa_newctx(provctx, alg, propq);                            \
    }                                                                          \
    const OSSL_DISPATCH ossl_slh_dsa_##fn##_signature_functions[] = {          \
        { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))slh_dsa_##fn##_newctx }, \
        { OSSL_FUNC_SIGNATURE_SIGN_MESSAGE_INIT,                               \
          (void (*)(void))slh_dsa_sign_msg_init },                             \
        { OSSL_FUNC_SIGNATURE_SIGN, (void (*)(void))slh_dsa_sign },            \
        { OSSL_FUNC_SIGNATURE_VERIFY_MESSAGE_INIT,                             \
          (void (*)(void))slh_dsa_verify_msg_init },                           \
        { OSSL_FUNC_SIGNATURE_VERIFY, (void (*)(void))slh_dsa_verify },        \
        { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,                                \
          (void (*)(void))slh_dsa_digest_signverify_init },                    \
        { OSSL_FUNC_SIGNATURE_DIGEST_SIGN,                                     \
          (void (*)(void))slh_dsa_digest_sign },                               \
        { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,                              \
          (void (*)(void))slh_dsa_digest_signverify_init },                    \
        { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY,                                   \
          (void (*)(void))slh_dsa_digest_verify },                             \
        { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))slh_dsa_freectx },      \
        { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))slh_dsa_dupctx },        \
        { OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS, (void (*)(void))slh_dsa_set_ctx_params },\
        { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS,                             \
          (void (*)(void))slh_dsa_settable_ctx_params },                       \
        { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS,                                  \
          (void (*)(void))slh_dsa_get_ctx_params },                            \
        { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,                             \
          (void (*)(void))slh_dsa_gettable_ctx_params },                       \
        OSSL_DISPATCH_END                                                      \
    }

MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-128s", sha2_128s);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-128f", sha2_128f);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-192s", sha2_192s);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-192f", sha2_192f);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-256s", sha2_256s);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-256f", sha2_256f);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-128s", shake_128s);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-128f", shake_128f);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-192s", shake_192s);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-192f", shake_192f);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-256s", shake_256s);
MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-256f", shake_256f);

Coverage Report

Created: 2025-11-11 06:20

Line	Count	Source
1		/*
2		* Copyright 2024-2025 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		#include <openssl/core_names.h>
11		#include <openssl/err.h>
12		#include <openssl/rand.h>
13		#include <openssl/proverr.h>
14		#include <openssl/self_test.h>
15		#include "prov/implementations.h"
16		#include "prov/providercommon.h"
17		#include "prov/provider_ctx.h"
18		#include "prov/der_slh_dsa.h"
19		#include "crypto/slh_dsa.h"
20		#include "internal/cryptlib.h"
21		#include "internal/sizes.h"
22		#include "internal/fips.h"
23		#include "providers/implementations/signature/slh_dsa_sig.inc"
24
25		#define SLH_DSA_MAX_ADD_RANDOM_LEN 32
26
27		#define SLH_DSA_MESSAGE_ENCODE_RAW 0
28	0	#define SLH_DSA_MESSAGE_ENCODE_PURE 1
29
30		static OSSL_FUNC_signature_sign_message_init_fn slh_dsa_sign_msg_init;
31		static OSSL_FUNC_signature_sign_fn slh_dsa_sign;
32		static OSSL_FUNC_signature_verify_message_init_fn slh_dsa_verify_msg_init;
33		static OSSL_FUNC_signature_verify_fn slh_dsa_verify;
34		static OSSL_FUNC_signature_digest_sign_init_fn slh_dsa_digest_signverify_init;
35		static OSSL_FUNC_signature_digest_sign_fn slh_dsa_digest_sign;
36		static OSSL_FUNC_signature_digest_verify_fn slh_dsa_digest_verify;
37		static OSSL_FUNC_signature_freectx_fn slh_dsa_freectx;
38		static OSSL_FUNC_signature_dupctx_fn slh_dsa_dupctx;
39		static OSSL_FUNC_signature_set_ctx_params_fn slh_dsa_set_ctx_params;
40		static OSSL_FUNC_signature_settable_ctx_params_fn slh_dsa_settable_ctx_params;
41
42		#ifdef FIPS_MODULE
43		static FIPS_DEFERRED_TEST slh_sig_deferred_tests[] = {
44		{
45		"SLH-DSA-SHA2-128f",
46		FIPS_DEFERRED_KAT_SIGNATURE,
47		FIPS_DEFERRED_TEST_INIT
48		},
49		{
50		"SLH-DSA-SHAKE-128f",
51		FIPS_DEFERRED_KAT_SIGNATURE,
52		FIPS_DEFERRED_TEST_INIT
53		},
54		{ NULL, 0, 0 },
55		};
56		#endif
57
58		static int slh_dsa_self_check(OSSL_LIB_CTX *libctx)
59	0	{
60	0	if (!ossl_prov_is_running())
61	0	return 0;
62
63		#ifdef FIPS_MODULE
64		return FIPS_deferred_self_tests(libctx, slh_sig_deferred_tests);
65		#else
66	0	return 1;
67	0	#endif
68	0	}
69
70		/*
71		* NOTE: Any changes to this structure may require updating slh_dsa_dupctx().
72		*/
73		typedef struct {
74		SLH_DSA_KEY key; / Note that the key is not owned by this object */
75		SLH_DSA_HASH_CTX *hash_ctx;
76		uint8_t context_string[SLH_DSA_MAX_CONTEXT_STRING_LEN];
77		size_t context_string_len;
78		uint8_t add_random[SLH_DSA_MAX_ADD_RANDOM_LEN];
79		size_t add_random_len;
80		int msg_encode;
81		int deterministic;
82		OSSL_LIB_CTX *libctx;
83		char *propq;
84		const char *alg;
85		/* The Algorithm Identifier of the signature algorithm */
86		uint8_t aid_buf[OSSL_MAX_ALGORITHM_ID_SIZE];
87		size_t aid_len;
88		} PROV_SLH_DSA_CTX;
89
90		static void slh_dsa_freectx(void *vctx)
91	0	{
92	0	PROV_SLH_DSA_CTX ctx = (PROV_SLH_DSA_CTX )vctx;
93
94	0	ossl_slh_dsa_hash_ctx_free(ctx->hash_ctx);
95	0	OPENSSL_free(ctx->propq);
96	0	OPENSSL_cleanse(ctx->add_random, ctx->add_random_len);
97	0	OPENSSL_free(ctx);
98	0	}
99
100		static void slh_dsa_newctx(void provctx, const char alg, const char propq)
101	0	{
102	0	PROV_SLH_DSA_CTX *ctx;
103
104	0	if (!slh_dsa_self_check(PROV_LIBCTX_OF(provctx)))
105	0	return NULL;
106
107	0	ctx = OPENSSL_zalloc(sizeof(PROV_SLH_DSA_CTX));
108	0	if (ctx == NULL)
109	0	return NULL;
110
111	0	ctx->libctx = PROV_LIBCTX_OF(provctx);
112	0	if (propq != NULL && (ctx->propq = OPENSSL_strdup(propq)) == NULL)
113	0	goto err;
114	0	ctx->alg = alg;
115	0	ctx->msg_encode = SLH_DSA_MESSAGE_ENCODE_PURE;
116	0	return ctx;
117	0	err:
118	0	slh_dsa_freectx(ctx);
119	0	return NULL;
120	0	}
121
122		static void slh_dsa_dupctx(void vctx)
123	0	{
124	0	PROV_SLH_DSA_CTX src = (PROV_SLH_DSA_CTX )vctx;
125	0	PROV_SLH_DSA_CTX *ret;
126
127	0	if (!ossl_prov_is_running())
128	0	return NULL;
129
130		/*
131		* Note that the SLH_DSA_KEY is ref counted via EVP_PKEY so we can just copy
132		* the key here.
133		*/
134	0	ret = OPENSSL_memdup(src, sizeof(*src));
135	0	if (ret == NULL)
136	0	return NULL;
137	0	ret->propq = NULL;
138	0	ret->hash_ctx = NULL;
139	0	if (src->propq != NULL && (ret->propq = OPENSSL_strdup(src->propq)) == NULL)
140	0	goto err;
141	0	ret->hash_ctx = ossl_slh_dsa_hash_ctx_dup(src->hash_ctx);
142	0	if (ret->hash_ctx == NULL)
143	0	goto err;
144
145	0	return ret;
146	0	err:
147	0	slh_dsa_freectx(ret);
148	0	return NULL;
149	0	}
150
151		static int slh_dsa_set_alg_id_buffer(PROV_SLH_DSA_CTX *ctx)
152	0	{
153	0	int ret;
154	0	WPACKET pkt;
155	0	uint8_t *aid = NULL;
156
157		/*
158		* We do not care about DER writing errors.
159		* All it really means is that for some reason, there's no
160		* AlgorithmIdentifier to be had, but the operation itself is
161		* still valid, just as long as it's not used to construct
162		* anything that needs an AlgorithmIdentifier.
163		*/
164	0	ctx->aid_len = 0;
165	0	ret = WPACKET_init_der(&pkt, ctx->aid_buf, sizeof(ctx->aid_buf));
166	0	ret = ret && ossl_DER_w_algorithmIdentifier_SLH_DSA(&pkt, -1, ctx->key);
167	0	if (ret && WPACKET_finish(&pkt)) {
168	0	WPACKET_get_total_written(&pkt, &ctx->aid_len);
169	0	aid = WPACKET_get_curr(&pkt);
170	0	}
171	0	WPACKET_cleanup(&pkt);
172	0	if (aid != NULL && ctx->aid_len != 0)
173	0	memmove(ctx->aid_buf, aid, ctx->aid_len);
174	0	return 1;
175	0	}
176
177		static int slh_dsa_signverify_msg_init(void vctx, void vkey,
178		const OSSL_PARAM params[], int operation,
179		const char *desc)
180	0	{
181	0	PROV_SLH_DSA_CTX ctx = (PROV_SLH_DSA_CTX )vctx;
182	0	SLH_DSA_KEY *key = vkey;
183
184	0	if (!ossl_prov_is_running()
185	0	\|\| ctx == NULL)
186	0	return 0;
187
188	0	if (vkey == NULL && ctx->key == NULL) {
189	0	ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
190	0	return 0;
191	0	}
192
193	0	if (key != NULL) {
194	0	if (!ossl_slh_dsa_key_type_matches(key, ctx->alg))
195	0	return 0;
196	0	ctx->hash_ctx = ossl_slh_dsa_hash_ctx_new(key);
197	0	if (ctx->hash_ctx == NULL)
198	0	return 0;
199	0	ctx->key = vkey;
200	0	}
201
202	0	slh_dsa_set_alg_id_buffer(ctx);
203	0	if (!slh_dsa_set_ctx_params(ctx, params))
204	0	return 0;
205	0	return 1;
206	0	}
207
208		static int slh_dsa_sign_msg_init(void vctx, void vkey, const OSSL_PARAM params[])
209	0	{
210	0	return slh_dsa_signverify_msg_init(vctx, vkey, params,
211	0	EVP_PKEY_OP_SIGN, "SLH_DSA Sign Init");
212	0	}
213
214		static int slh_dsa_digest_signverify_init(void vctx, const char mdname,
215		void *vkey, const OSSL_PARAM params[])
216	0	{
217	0	PROV_SLH_DSA_CTX ctx = (PROV_SLH_DSA_CTX )vctx;
218
219	0	if (mdname != NULL && mdname[0] != '\0') {
220	0	ERR_raise_data(ERR_LIB_PROV, PROV_R_INVALID_DIGEST,
221	0	"Explicit digest not supported for SLH-DSA operations");
222	0	return 0;
223	0	}
224
225	0	if (vkey == NULL && ctx->key != NULL)
226	0	return slh_dsa_set_ctx_params(ctx, params);
227
228	0	return slh_dsa_signverify_msg_init(vctx, vkey, params,
229	0	EVP_PKEY_OP_SIGN, "SLH_DSA Sign Init");
230	0	}
231
232		static int slh_dsa_sign(void vctx, unsigned char sig, size_t *siglen,
233		size_t sigsize, const unsigned char *msg, size_t msg_len)
234	0	{
235	0	int ret = 0;
236	0	PROV_SLH_DSA_CTX ctx = (PROV_SLH_DSA_CTX )vctx;
237	0	uint8_t add_rand[SLH_DSA_MAX_ADD_RANDOM_LEN], *opt_rand = NULL;
238	0	size_t n = 0;
239
240	0	if (!ossl_prov_is_running())
241	0	return 0;
242
243	0	if (sig != NULL) {
244	0	if (ctx->add_random_len != 0) {
245	0	opt_rand = ctx->add_random;
246	0	} else if (ctx->deterministic == 0) {
247	0	n = ossl_slh_dsa_key_get_n(ctx->key);
248	0	if (RAND_priv_bytes_ex(ctx->libctx, add_rand, n, 0) <= 0)
249	0	return 0;
250	0	opt_rand = add_rand;
251	0	}
252	0	}
253	0	ret = ossl_slh_dsa_sign(ctx->hash_ctx, msg, msg_len,
254	0	ctx->context_string, ctx->context_string_len,
255	0	opt_rand, ctx->msg_encode,
256	0	sig, siglen, sigsize);
257	0	if (opt_rand != add_rand)
258	0	OPENSSL_cleanse(opt_rand, n);
259	0	return ret;
260	0	}
261
262		static int slh_dsa_digest_sign(void vctx, uint8_t sig, size_t *siglen, size_t sigsize,
263		const uint8_t *tbs, size_t tbslen)
264	0	{
265	0	return slh_dsa_sign(vctx, sig, siglen, sigsize, tbs, tbslen);
266	0	}
267
268		static int slh_dsa_verify_msg_init(void vctx, void vkey, const OSSL_PARAM params[])
269	0	{
270	0	return slh_dsa_signverify_msg_init(vctx, vkey, params, EVP_PKEY_OP_VERIFY,
271	0	"SLH_DSA Verify Init");
272	0	}
273
274		static int slh_dsa_verify(void vctx, const uint8_t sig, size_t siglen,
275		const uint8_t *msg, size_t msg_len)
276	0	{
277	0	PROV_SLH_DSA_CTX ctx = (PROV_SLH_DSA_CTX )vctx;
278
279	0	if (!ossl_prov_is_running())
280	0	return 0;
281	0	return ossl_slh_dsa_verify(ctx->hash_ctx, msg, msg_len,
282	0	ctx->context_string, ctx->context_string_len,
283	0	ctx->msg_encode, sig, siglen);
284	0	}
285		static int slh_dsa_digest_verify(void vctx, const uint8_t sig, size_t siglen,
286		const uint8_t *tbs, size_t tbslen)
287	0	{
288	0	return slh_dsa_verify(vctx, sig, siglen, tbs, tbslen);
289	0	}
290
291		static int slh_dsa_set_ctx_params(void *vctx, const OSSL_PARAM params[])
292	0	{
293	0	PROV_SLH_DSA_CTX pctx = (PROV_SLH_DSA_CTX )vctx;
294	0	struct slh_dsa_set_ctx_params_st p;
295
296	0	if (pctx == NULL \|\| !slh_dsa_set_ctx_params_decoder(params, &p))
297	0	return 0;
298
299	0	if (p.context != NULL) {
300	0	void *vp = pctx->context_string;
301
302	0	if (!OSSL_PARAM_get_octet_string(p.context, &vp,
303	0	sizeof(pctx->context_string),
304	0	&(pctx->context_string_len))) {
305	0	pctx->context_string_len = 0;
306	0	return 0;
307	0	}
308	0	}
309
310	0	if (p.entropy != NULL) {
311	0	void *vp = pctx->add_random;
312	0	size_t n = ossl_slh_dsa_key_get_n(pctx->key);
313
314	0	if (!OSSL_PARAM_get_octet_string(p.entropy, &vp, n, &(pctx->add_random_len))
315	0	\|\| pctx->add_random_len != n) {
316	0	pctx->add_random_len = 0;
317	0	return 0;
318	0	}
319	0	}
320
321	0	if (p.det != NULL && !OSSL_PARAM_get_int(p.det, &pctx->deterministic))
322	0	return 0;
323
324	0	if (p.msgenc != NULL && !OSSL_PARAM_get_int(p.msgenc, &pctx->msg_encode))
325	0	return 0;
326	0	return 1;
327	0	}
328
329		static const OSSL_PARAM slh_dsa_settable_ctx_params(void vctx,
330		ossl_unused void *provctx)
331	0	{
332	0	return slh_dsa_set_ctx_params_list;
333	0	}
334
335		static const OSSL_PARAM slh_dsa_gettable_ctx_params(ossl_unused void vctx,
336		ossl_unused void *provctx)
337	0	{
338	0	return slh_dsa_get_ctx_params_list;
339	0	}
340
341		static int slh_dsa_get_ctx_params(void vctx, OSSL_PARAM params)
342	0	{
343	0	PROV_SLH_DSA_CTX ctx = (PROV_SLH_DSA_CTX )vctx;
344	0	struct slh_dsa_get_ctx_params_st p;
345
346	0	if (ctx == NULL \|\| !slh_dsa_get_ctx_params_decoder(params, &p))
347	0	return 0;
348
349	0	if (p.algid != NULL
350	0	&& !OSSL_PARAM_set_octet_string(p.algid,
351	0	ctx->aid_len == 0 ? NULL : ctx->aid_buf,
352	0	ctx->aid_len))
353	0	return 0;
354
355	0	return 1;
356	0	}
357
358		#define MAKE_SIGNATURE_FUNCTIONS(alg, fn) \
359		static OSSL_FUNC_signature_newctx_fn slh_dsa_##fn##_newctx; \
360		static void slh_dsa_##fn##_newctx(void provctx, const char *propq) \
361	0	{ \
362	0	return slh_dsa_newctx(provctx, alg, propq); \
363	0	} \ Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_sha2_128s_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_sha2_128f_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_sha2_192s_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_sha2_192f_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_sha2_256s_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_sha2_256f_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_shake_128s_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_shake_128f_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_shake_192s_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_shake_192f_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_shake_256s_newctx Unexecuted instantiation: slh_dsa_sig.c:slh_dsa_shake_256f_newctx
364		const OSSL_DISPATCH ossl_slh_dsa_##fn##_signature_functions[] = { \
365		{ OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))slh_dsa_##fn##_newctx }, \
366		{ OSSL_FUNC_SIGNATURE_SIGN_MESSAGE_INIT, \
367		(void (*)(void))slh_dsa_sign_msg_init }, \
368		{ OSSL_FUNC_SIGNATURE_SIGN, (void (*)(void))slh_dsa_sign }, \
369		{ OSSL_FUNC_SIGNATURE_VERIFY_MESSAGE_INIT, \
370		(void (*)(void))slh_dsa_verify_msg_init }, \
371		{ OSSL_FUNC_SIGNATURE_VERIFY, (void (*)(void))slh_dsa_verify }, \
372		{ OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT, \
373		(void (*)(void))slh_dsa_digest_signverify_init }, \
374		{ OSSL_FUNC_SIGNATURE_DIGEST_SIGN, \
375		(void (*)(void))slh_dsa_digest_sign }, \
376		{ OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT, \
377		(void (*)(void))slh_dsa_digest_signverify_init }, \
378		{ OSSL_FUNC_SIGNATURE_DIGEST_VERIFY, \
379		(void (*)(void))slh_dsa_digest_verify }, \
380		{ OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))slh_dsa_freectx }, \
381		{ OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))slh_dsa_dupctx }, \
382		{ OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS, (void (*)(void))slh_dsa_set_ctx_params },\
383		{ OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS, \
384		(void (*)(void))slh_dsa_settable_ctx_params }, \
385		{ OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, \
386		(void (*)(void))slh_dsa_get_ctx_params }, \
387		{ OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS, \
388		(void (*)(void))slh_dsa_gettable_ctx_params }, \
389		OSSL_DISPATCH_END \
390		}
391
392		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-128s", sha2_128s);
393		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-128f", sha2_128f);
394		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-192s", sha2_192s);
395		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-192f", sha2_192f);
396		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-256s", sha2_256s);
397		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHA2-256f", sha2_256f);
398		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-128s", shake_128s);
399		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-128f", shake_128f);
400		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-192s", shake_192s);
401		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-192f", shake_192f);
402		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-256s", shake_256s);
403		MAKE_SIGNATURE_FUNCTIONS("SLH-DSA-SHAKE-256f", shake_256f);