/src/openssl/providers/implementations/rands/test_rng.c

Source (jump to first uncovered line)
/*
 * Copyright 2020-2024 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 <string.h>
#include <stdlib.h>
#include <openssl/core_dispatch.h>
#include <openssl/e_os2.h>
#include <openssl/params.h>
#include <openssl/core_names.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/randerr.h>
#include "prov/securitycheck.h"
#include "prov/providercommon.h"
#include "prov/provider_ctx.h"
#include "prov/provider_util.h"
#include "prov/implementations.h"

static OSSL_FUNC_rand_newctx_fn test_rng_new;
static OSSL_FUNC_rand_freectx_fn test_rng_free;
static OSSL_FUNC_rand_instantiate_fn test_rng_instantiate;
static OSSL_FUNC_rand_uninstantiate_fn test_rng_uninstantiate;
static OSSL_FUNC_rand_generate_fn test_rng_generate;
static OSSL_FUNC_rand_reseed_fn test_rng_reseed;
static OSSL_FUNC_rand_nonce_fn test_rng_nonce;
static OSSL_FUNC_rand_settable_ctx_params_fn test_rng_settable_ctx_params;
static OSSL_FUNC_rand_set_ctx_params_fn test_rng_set_ctx_params;
static OSSL_FUNC_rand_gettable_ctx_params_fn test_rng_gettable_ctx_params;
static OSSL_FUNC_rand_get_ctx_params_fn test_rng_get_ctx_params;
static OSSL_FUNC_rand_verify_zeroization_fn test_rng_verify_zeroization;
static OSSL_FUNC_rand_enable_locking_fn test_rng_enable_locking;
static OSSL_FUNC_rand_lock_fn test_rng_lock;
static OSSL_FUNC_rand_unlock_fn test_rng_unlock;
static OSSL_FUNC_rand_get_seed_fn test_rng_get_seed;

typedef struct {
    void *provctx;
    unsigned int generate;
    int state;
    unsigned int strength;
    size_t max_request;
    unsigned char *entropy, *nonce;
    size_t entropy_len, entropy_pos, nonce_len;
    CRYPTO_RWLOCK *lock;
    uint32_t seed;
} PROV_TEST_RNG;

static void *test_rng_new(void *provctx, void *parent,
                          const OSSL_DISPATCH *parent_dispatch)
{
    PROV_TEST_RNG *t;

    t = OPENSSL_zalloc(sizeof(*t));
    if (t == NULL)
        return NULL;

    t->max_request = INT_MAX;
    t->provctx = provctx;
    t->state = EVP_RAND_STATE_UNINITIALISED;
    return t;
}

static void test_rng_free(void *vtest)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    if (t == NULL)
        return;
    OPENSSL_free(t->entropy);
    OPENSSL_free(t->nonce);
    CRYPTO_THREAD_lock_free(t->lock);
    OPENSSL_free(t);
}

static int test_rng_instantiate(void *vtest, unsigned int strength,
                                int prediction_resistance,
                                const unsigned char *pstr, size_t pstr_len,
                                const OSSL_PARAM params[])
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    if (!test_rng_set_ctx_params(t, params) || strength > t->strength)
        return 0;

    t->state = EVP_RAND_STATE_READY;
    t->entropy_pos = 0;
    t->seed = 221953166;    /* Value doesn't matter, so long as it isn't zero */

    return 1;
}

static int test_rng_uninstantiate(void *vtest)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    t->entropy_pos = 0;
    t->state = EVP_RAND_STATE_UNINITIALISED;
    return 1;
}

static unsigned char gen_byte(PROV_TEST_RNG *t)
{
    uint32_t n;

    /*
     * Implement the 32 bit xorshift as suggested by George Marsaglia in:
     *      https://doi.org/10.18637/jss.v008.i14
     *
     * This is a very fast PRNG so there is no need to extract bytes one at a
     * time and use the entire value each time.
     */
    n = t->seed;
    n ^= n << 13;
    n ^= n >> 17;
    n ^= n << 5;
    t->seed = n;

    return n & 0xff;
}

static int test_rng_generate(void *vtest, unsigned char *out, size_t outlen,
                             unsigned int strength, int prediction_resistance,
                             const unsigned char *adin, size_t adin_len)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
    size_t i;

    if (strength > t->strength)
        return 0;
    if (t->generate) {
        for (i = 0; i < outlen; i++)
            out[i] = gen_byte(t);
    } else {
        if (t->entropy_len - t->entropy_pos < outlen)
            return 0;

        memcpy(out, t->entropy + t->entropy_pos, outlen);
        t->entropy_pos += outlen;
    }
    return 1;
}

static int test_rng_reseed(ossl_unused void *vtest,
                           ossl_unused int prediction_resistance,
                           ossl_unused const unsigned char *ent,
                           ossl_unused size_t ent_len,
                           ossl_unused const unsigned char *adin,
                           ossl_unused size_t adin_len)
{
    return 1;
}

static size_t test_rng_nonce(void *vtest, unsigned char *out,
                             unsigned int strength, size_t min_noncelen,
                             size_t max_noncelen)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
    size_t i;

    if (strength > t->strength)
        return 0;

    if (t->generate) {
        for (i = 0; i < min_noncelen; i++)
            out[i] = gen_byte(t);
        return min_noncelen;
    }

    if (t->nonce == NULL)
        return 0;
    i = t->nonce_len > max_noncelen ? max_noncelen : t->nonce_len;
    if (out != NULL)
        memcpy(out, t->nonce, i);
    return i;
}

static int test_rng_get_ctx_params(void *vtest, OSSL_PARAM params[])
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
    OSSL_PARAM *p;

    p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_STATE);
    if (p != NULL && !OSSL_PARAM_set_int(p, t->state))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_STRENGTH);
    if (p != NULL && !OSSL_PARAM_set_int(p, t->strength))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_MAX_REQUEST);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, t->max_request))
        return 0;

    p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_GENERATE);
    if (p != NULL && !OSSL_PARAM_set_uint(p, t->generate))
        return 0;

#ifdef FIPS_MODULE
    p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_FIPS_APPROVED_INDICATOR);
    if (p != NULL && !OSSL_PARAM_set_int(p, 0))
        return 0;
#endif  /* FIPS_MODULE */
    return 1;
}

static const OSSL_PARAM *test_rng_gettable_ctx_params(ossl_unused void *vtest,
                                                      ossl_unused void *provctx)
{
    static const OSSL_PARAM known_gettable_ctx_params[] = {
        OSSL_PARAM_int(OSSL_RAND_PARAM_STATE, NULL),
        OSSL_PARAM_uint(OSSL_RAND_PARAM_STRENGTH, NULL),
        OSSL_PARAM_size_t(OSSL_RAND_PARAM_MAX_REQUEST, NULL),
        OSSL_PARAM_uint(OSSL_RAND_PARAM_GENERATE, NULL),
        OSSL_FIPS_IND_GETTABLE_CTX_PARAM()
        OSSL_PARAM_END
    };
    return known_gettable_ctx_params;
}

static int test_rng_set_ctx_params(void *vtest, const OSSL_PARAM params[])
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
    const OSSL_PARAM *p;
    void *ptr = NULL;
    size_t size = 0;

    if (ossl_param_is_empty(params))
        return 1;

    p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_STRENGTH);
    if (p != NULL && !OSSL_PARAM_get_uint(p, &t->strength))
        return 0;

    p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_TEST_ENTROPY);
    if (p != NULL) {
        if (!OSSL_PARAM_get_octet_string(p, &ptr, 0, &size))
            return 0;
        OPENSSL_free(t->entropy);
        t->entropy = ptr;
        t->entropy_len = size;
        t->entropy_pos = 0;
        ptr = NULL;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_TEST_NONCE);
    if (p != NULL) {
        if (!OSSL_PARAM_get_octet_string(p, &ptr, 0, &size))
            return 0;
        OPENSSL_free(t->nonce);
        t->nonce = ptr;
        t->nonce_len = size;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_MAX_REQUEST);
    if (p != NULL && !OSSL_PARAM_get_size_t(p, &t->max_request))
        return 0;

    p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_GENERATE);
    if (p != NULL && !OSSL_PARAM_get_uint(p, &t->generate))
        return 0;
    return 1;
}

static const OSSL_PARAM *test_rng_settable_ctx_params(ossl_unused void *vtest,
                                                      ossl_unused void *provctx)
{
    static const OSSL_PARAM known_settable_ctx_params[] = {
        OSSL_PARAM_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY, NULL, 0),
        OSSL_PARAM_octet_string(OSSL_RAND_PARAM_TEST_NONCE, NULL, 0),
        OSSL_PARAM_uint(OSSL_RAND_PARAM_STRENGTH, NULL),
        OSSL_PARAM_size_t(OSSL_RAND_PARAM_MAX_REQUEST, NULL),
        OSSL_PARAM_uint(OSSL_RAND_PARAM_GENERATE, NULL),
        OSSL_PARAM_END
    };
    return known_settable_ctx_params;
}

static int test_rng_verify_zeroization(ossl_unused void *vtest)
{
    return 1;
}

static size_t test_rng_get_seed(void *vtest, unsigned char **pout,
                                int entropy, size_t min_len, size_t max_len,
                                ossl_unused int prediction_resistance,
                                ossl_unused const unsigned char *adin,
                                ossl_unused size_t adin_len)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    *pout = t->entropy;
    return  t->entropy_len > max_len ? max_len : t->entropy_len;
}

static int test_rng_enable_locking(void *vtest)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    if (t != NULL && t->lock == NULL) {
        t->lock = CRYPTO_THREAD_lock_new();
        if (t->lock == NULL) {
            ERR_raise(ERR_LIB_PROV, RAND_R_FAILED_TO_CREATE_LOCK);
            return 0;
        }
    }
    return 1;
}

static int test_rng_lock(void *vtest)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    if (t == NULL || t->lock == NULL)
        return 1;
    return CRYPTO_THREAD_write_lock(t->lock);
}

static void test_rng_unlock(void *vtest)
{
    PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;

    if (t != NULL && t->lock != NULL)
        CRYPTO_THREAD_unlock(t->lock);
}

const OSSL_DISPATCH ossl_test_rng_functions[] = {
    { OSSL_FUNC_RAND_NEWCTX, (void(*)(void))test_rng_new },
    { OSSL_FUNC_RAND_FREECTX, (void(*)(void))test_rng_free },
    { OSSL_FUNC_RAND_INSTANTIATE,
      (void(*)(void))test_rng_instantiate },
    { OSSL_FUNC_RAND_UNINSTANTIATE,
      (void(*)(void))test_rng_uninstantiate },
    { OSSL_FUNC_RAND_GENERATE, (void(*)(void))test_rng_generate },
    { OSSL_FUNC_RAND_RESEED, (void(*)(void))test_rng_reseed },
    { OSSL_FUNC_RAND_NONCE, (void(*)(void))test_rng_nonce },
    { OSSL_FUNC_RAND_ENABLE_LOCKING, (void(*)(void))test_rng_enable_locking },
    { OSSL_FUNC_RAND_LOCK, (void(*)(void))test_rng_lock },
    { OSSL_FUNC_RAND_UNLOCK, (void(*)(void))test_rng_unlock },
    { OSSL_FUNC_RAND_SETTABLE_CTX_PARAMS,
      (void(*)(void))test_rng_settable_ctx_params },
    { OSSL_FUNC_RAND_SET_CTX_PARAMS, (void(*)(void))test_rng_set_ctx_params },
    { OSSL_FUNC_RAND_GETTABLE_CTX_PARAMS,
      (void(*)(void))test_rng_gettable_ctx_params },
    { OSSL_FUNC_RAND_GET_CTX_PARAMS, (void(*)(void))test_rng_get_ctx_params },
    { OSSL_FUNC_RAND_VERIFY_ZEROIZATION,
      (void(*)(void))test_rng_verify_zeroization },
    { OSSL_FUNC_RAND_GET_SEED, (void(*)(void))test_rng_get_seed },
    OSSL_DISPATCH_END
};

Coverage Report

Created: 2025-06-13 06:36

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2020-2024 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 <string.h>
11		#include <stdlib.h>
12		#include <openssl/core_dispatch.h>
13		#include <openssl/e_os2.h>
14		#include <openssl/params.h>
15		#include <openssl/core_names.h>
16		#include <openssl/evp.h>
17		#include <openssl/err.h>
18		#include <openssl/randerr.h>
19		#include "prov/securitycheck.h"
20		#include "prov/providercommon.h"
21		#include "prov/provider_ctx.h"
22		#include "prov/provider_util.h"
23		#include "prov/implementations.h"
24
25		static OSSL_FUNC_rand_newctx_fn test_rng_new;
26		static OSSL_FUNC_rand_freectx_fn test_rng_free;
27		static OSSL_FUNC_rand_instantiate_fn test_rng_instantiate;
28		static OSSL_FUNC_rand_uninstantiate_fn test_rng_uninstantiate;
29		static OSSL_FUNC_rand_generate_fn test_rng_generate;
30		static OSSL_FUNC_rand_reseed_fn test_rng_reseed;
31		static OSSL_FUNC_rand_nonce_fn test_rng_nonce;
32		static OSSL_FUNC_rand_settable_ctx_params_fn test_rng_settable_ctx_params;
33		static OSSL_FUNC_rand_set_ctx_params_fn test_rng_set_ctx_params;
34		static OSSL_FUNC_rand_gettable_ctx_params_fn test_rng_gettable_ctx_params;
35		static OSSL_FUNC_rand_get_ctx_params_fn test_rng_get_ctx_params;
36		static OSSL_FUNC_rand_verify_zeroization_fn test_rng_verify_zeroization;
37		static OSSL_FUNC_rand_enable_locking_fn test_rng_enable_locking;
38		static OSSL_FUNC_rand_lock_fn test_rng_lock;
39		static OSSL_FUNC_rand_unlock_fn test_rng_unlock;
40		static OSSL_FUNC_rand_get_seed_fn test_rng_get_seed;
41
42		typedef struct {
43		void *provctx;
44		unsigned int generate;
45		int state;
46		unsigned int strength;
47		size_t max_request;
48		unsigned char entropy, nonce;
49		size_t entropy_len, entropy_pos, nonce_len;
50		CRYPTO_RWLOCK *lock;
51		uint32_t seed;
52		} PROV_TEST_RNG;
53
54		static void test_rng_new(void provctx, void *parent,
55		const OSSL_DISPATCH *parent_dispatch)
56	0	{
57	0	PROV_TEST_RNG *t;
58
59	0	t = OPENSSL_zalloc(sizeof(*t));
60	0	if (t == NULL)
61	0	return NULL;
62
63	0	t->max_request = INT_MAX;
64	0	t->provctx = provctx;
65	0	t->state = EVP_RAND_STATE_UNINITIALISED;
66	0	return t;
67	0	}
68
69		static void test_rng_free(void *vtest)
70	0	{
71	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
72
73	0	if (t == NULL)
74	0	return;
75	0	OPENSSL_free(t->entropy);
76	0	OPENSSL_free(t->nonce);
77	0	CRYPTO_THREAD_lock_free(t->lock);
78	0	OPENSSL_free(t);
79	0	}
80
81		static int test_rng_instantiate(void *vtest, unsigned int strength,
82		int prediction_resistance,
83		const unsigned char *pstr, size_t pstr_len,
84		const OSSL_PARAM params[])
85	0	{
86	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
87
88	0	if (!test_rng_set_ctx_params(t, params) \|\| strength > t->strength)
89	0	return 0;
90
91	0	t->state = EVP_RAND_STATE_READY;
92	0	t->entropy_pos = 0;
93	0	t->seed = 221953166; /* Value doesn't matter, so long as it isn't zero */
94
95	0	return 1;
96	0	}
97
98		static int test_rng_uninstantiate(void *vtest)
99	0	{
100	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
101
102	0	t->entropy_pos = 0;
103	0	t->state = EVP_RAND_STATE_UNINITIALISED;
104	0	return 1;
105	0	}
106
107		static unsigned char gen_byte(PROV_TEST_RNG *t)
108	0	{
109	0	uint32_t n;
110
111		/*
112		* Implement the 32 bit xorshift as suggested by George Marsaglia in:
113		* https://doi.org/10.18637/jss.v008.i14
114		*
115		* This is a very fast PRNG so there is no need to extract bytes one at a
116		* time and use the entire value each time.
117		*/
118	0	n = t->seed;
119	0	n ^= n << 13;
120	0	n ^= n >> 17;
121	0	n ^= n << 5;
122	0	t->seed = n;
123
124	0	return n & 0xff;
125	0	}
126
127		static int test_rng_generate(void vtest, unsigned char out, size_t outlen,
128		unsigned int strength, int prediction_resistance,
129		const unsigned char *adin, size_t adin_len)
130	0	{
131	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
132	0	size_t i;
133
134	0	if (strength > t->strength)
135	0	return 0;
136	0	if (t->generate) {
137	0	for (i = 0; i < outlen; i++)
138	0	out[i] = gen_byte(t);
139	0	} else {
140	0	if (t->entropy_len - t->entropy_pos < outlen)
141	0	return 0;
142
143	0	memcpy(out, t->entropy + t->entropy_pos, outlen);
144	0	t->entropy_pos += outlen;
145	0	}
146	0	return 1;
147	0	}
148
149		static int test_rng_reseed(ossl_unused void *vtest,
150		ossl_unused int prediction_resistance,
151		ossl_unused const unsigned char *ent,
152		ossl_unused size_t ent_len,
153		ossl_unused const unsigned char *adin,
154		ossl_unused size_t adin_len)
155	0	{
156	0	return 1;
157	0	}
158
159		static size_t test_rng_nonce(void vtest, unsigned char out,
160		unsigned int strength, size_t min_noncelen,
161		size_t max_noncelen)
162	0	{
163	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
164	0	size_t i;
165
166	0	if (strength > t->strength)
167	0	return 0;
168
169	0	if (t->generate) {
170	0	for (i = 0; i < min_noncelen; i++)
171	0	out[i] = gen_byte(t);
172	0	return min_noncelen;
173	0	}
174
175	0	if (t->nonce == NULL)
176	0	return 0;
177	0	i = t->nonce_len > max_noncelen ? max_noncelen : t->nonce_len;
178	0	if (out != NULL)
179	0	memcpy(out, t->nonce, i);
180	0	return i;
181	0	}
182
183		static int test_rng_get_ctx_params(void *vtest, OSSL_PARAM params[])
184	0	{
185	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
186	0	OSSL_PARAM *p;
187
188	0	p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_STATE);
189	0	if (p != NULL && !OSSL_PARAM_set_int(p, t->state))
190	0	return 0;
191
192	0	p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_STRENGTH);
193	0	if (p != NULL && !OSSL_PARAM_set_int(p, t->strength))
194	0	return 0;
195
196	0	p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_MAX_REQUEST);
197	0	if (p != NULL && !OSSL_PARAM_set_size_t(p, t->max_request))
198	0	return 0;
199
200	0	p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_GENERATE);
201	0	if (p != NULL && !OSSL_PARAM_set_uint(p, t->generate))
202	0	return 0;
203
204		#ifdef FIPS_MODULE
205		p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_FIPS_APPROVED_INDICATOR);
206		if (p != NULL && !OSSL_PARAM_set_int(p, 0))
207		return 0;
208		#endif /* FIPS_MODULE */
209	0	return 1;
210	0	}
211
212		static const OSSL_PARAM test_rng_gettable_ctx_params(ossl_unused void vtest,
213		ossl_unused void *provctx)
214	0	{
215	0	static const OSSL_PARAM known_gettable_ctx_params[] = {
216	0	OSSL_PARAM_int(OSSL_RAND_PARAM_STATE, NULL),
217	0	OSSL_PARAM_uint(OSSL_RAND_PARAM_STRENGTH, NULL),
218	0	OSSL_PARAM_size_t(OSSL_RAND_PARAM_MAX_REQUEST, NULL),
219	0	OSSL_PARAM_uint(OSSL_RAND_PARAM_GENERATE, NULL),
220	0	OSSL_FIPS_IND_GETTABLE_CTX_PARAM()
221	0	OSSL_PARAM_END
222	0	};
223	0	return known_gettable_ctx_params;
224	0	}
225
226		static int test_rng_set_ctx_params(void *vtest, const OSSL_PARAM params[])
227	0	{
228	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
229	0	const OSSL_PARAM *p;
230	0	void *ptr = NULL;
231	0	size_t size = 0;
232
233	0	if (ossl_param_is_empty(params))
234	0	return 1;
235
236	0	p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_STRENGTH);
237	0	if (p != NULL && !OSSL_PARAM_get_uint(p, &t->strength))
238	0	return 0;
239
240	0	p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_TEST_ENTROPY);
241	0	if (p != NULL) {
242	0	if (!OSSL_PARAM_get_octet_string(p, &ptr, 0, &size))
243	0	return 0;
244	0	OPENSSL_free(t->entropy);
245	0	t->entropy = ptr;
246	0	t->entropy_len = size;
247	0	t->entropy_pos = 0;
248	0	ptr = NULL;
249	0	}
250
251	0	p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_TEST_NONCE);
252	0	if (p != NULL) {
253	0	if (!OSSL_PARAM_get_octet_string(p, &ptr, 0, &size))
254	0	return 0;
255	0	OPENSSL_free(t->nonce);
256	0	t->nonce = ptr;
257	0	t->nonce_len = size;
258	0	}
259
260	0	p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_MAX_REQUEST);
261	0	if (p != NULL && !OSSL_PARAM_get_size_t(p, &t->max_request))
262	0	return 0;
263
264	0	p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_GENERATE);
265	0	if (p != NULL && !OSSL_PARAM_get_uint(p, &t->generate))
266	0	return 0;
267	0	return 1;
268	0	}
269
270		static const OSSL_PARAM test_rng_settable_ctx_params(ossl_unused void vtest,
271		ossl_unused void *provctx)
272	0	{
273	0	static const OSSL_PARAM known_settable_ctx_params[] = {
274	0	OSSL_PARAM_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY, NULL, 0),
275	0	OSSL_PARAM_octet_string(OSSL_RAND_PARAM_TEST_NONCE, NULL, 0),
276	0	OSSL_PARAM_uint(OSSL_RAND_PARAM_STRENGTH, NULL),
277	0	OSSL_PARAM_size_t(OSSL_RAND_PARAM_MAX_REQUEST, NULL),
278	0	OSSL_PARAM_uint(OSSL_RAND_PARAM_GENERATE, NULL),
279	0	OSSL_PARAM_END
280	0	};
281	0	return known_settable_ctx_params;
282	0	}
283
284		static int test_rng_verify_zeroization(ossl_unused void *vtest)
285	0	{
286	0	return 1;
287	0	}
288
289		static size_t test_rng_get_seed(void vtest, unsigned char *pout,
290		int entropy, size_t min_len, size_t max_len,
291		ossl_unused int prediction_resistance,
292		ossl_unused const unsigned char *adin,
293		ossl_unused size_t adin_len)
294	0	{
295	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
296
297	0	*pout = t->entropy;
298	0	return t->entropy_len > max_len ? max_len : t->entropy_len;
299	0	}
300
301		static int test_rng_enable_locking(void *vtest)
302	0	{
303	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
304
305	0	if (t != NULL && t->lock == NULL) {
306	0	t->lock = CRYPTO_THREAD_lock_new();
307	0	if (t->lock == NULL) {
308	0	ERR_raise(ERR_LIB_PROV, RAND_R_FAILED_TO_CREATE_LOCK);
309	0	return 0;
310	0	}
311	0	}
312	0	return 1;
313	0	}
314
315		static int test_rng_lock(void *vtest)
316	0	{
317	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
318
319	0	if (t == NULL \|\| t->lock == NULL)
320	0	return 1;
321	0	return CRYPTO_THREAD_write_lock(t->lock);
322	0	}
323
324		static void test_rng_unlock(void *vtest)
325	0	{
326	0	PROV_TEST_RNG t = (PROV_TEST_RNG )vtest;
327
328	0	if (t != NULL && t->lock != NULL)
329	0	CRYPTO_THREAD_unlock(t->lock);
330	0	}
331
332		const OSSL_DISPATCH ossl_test_rng_functions[] = {
333		{ OSSL_FUNC_RAND_NEWCTX, (void(*)(void))test_rng_new },
334		{ OSSL_FUNC_RAND_FREECTX, (void(*)(void))test_rng_free },
335		{ OSSL_FUNC_RAND_INSTANTIATE,
336		(void(*)(void))test_rng_instantiate },
337		{ OSSL_FUNC_RAND_UNINSTANTIATE,
338		(void(*)(void))test_rng_uninstantiate },
339		{ OSSL_FUNC_RAND_GENERATE, (void(*)(void))test_rng_generate },
340		{ OSSL_FUNC_RAND_RESEED, (void(*)(void))test_rng_reseed },
341		{ OSSL_FUNC_RAND_NONCE, (void(*)(void))test_rng_nonce },
342		{ OSSL_FUNC_RAND_ENABLE_LOCKING, (void(*)(void))test_rng_enable_locking },
343		{ OSSL_FUNC_RAND_LOCK, (void(*)(void))test_rng_lock },
344		{ OSSL_FUNC_RAND_UNLOCK, (void(*)(void))test_rng_unlock },
345		{ OSSL_FUNC_RAND_SETTABLE_CTX_PARAMS,
346		(void(*)(void))test_rng_settable_ctx_params },
347		{ OSSL_FUNC_RAND_SET_CTX_PARAMS, (void(*)(void))test_rng_set_ctx_params },
348		{ OSSL_FUNC_RAND_GETTABLE_CTX_PARAMS,
349		(void(*)(void))test_rng_gettable_ctx_params },
350		{ OSSL_FUNC_RAND_GET_CTX_PARAMS, (void(*)(void))test_rng_get_ctx_params },
351		{ OSSL_FUNC_RAND_VERIFY_ZEROIZATION,
352		(void(*)(void))test_rng_verify_zeroization },
353		{ OSSL_FUNC_RAND_GET_SEED, (void(*)(void))test_rng_get_seed },
354		OSSL_DISPATCH_END
355		};