/src/openssl/providers/implementations/ciphers/cipher_chacha20.c

Source (jump to first uncovered line)
/*
 * Copyright 2019-2023 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
 */

/* Dispatch functions for chacha20 cipher */

#include <openssl/proverr.h>
#include <openssl/params.h>
#include "cipher_chacha20.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"

#define CHACHA20_KEYLEN (CHACHA_KEY_SIZE)
#define CHACHA20_BLKLEN (1)
#define CHACHA20_IVLEN (CHACHA_CTR_SIZE)
#define CHACHA20_FLAGS (PROV_CIPHER_FLAG_CUSTOM_IV)

static OSSL_FUNC_cipher_newctx_fn chacha20_newctx;
static OSSL_FUNC_cipher_freectx_fn chacha20_freectx;
static OSSL_FUNC_cipher_dupctx_fn chacha20_dupctx;
static OSSL_FUNC_cipher_get_params_fn chacha20_get_params;
static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_get_ctx_params;
static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_set_ctx_params;
static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_gettable_ctx_params;
static OSSL_FUNC_cipher_settable_ctx_params_fn chacha20_settable_ctx_params;
#define chacha20_cipher ossl_cipher_generic_cipher
#define chacha20_update ossl_cipher_generic_stream_update
#define chacha20_final ossl_cipher_generic_stream_final
#define chacha20_gettable_params ossl_cipher_generic_gettable_params
#define CHACHA_U32TOU8(ct, st) \
    do { \
        (ct)[3] = (unsigned char)((st) >> 24); \
        (ct)[2] = (unsigned char)((st) >> 16); \
        (ct)[1] = (unsigned char)((st) >>  8); \
        (ct)[0] = (unsigned char)(st); \
    } while (0)

void ossl_chacha20_initctx(PROV_CHACHA20_CTX *ctx)
{
    ossl_cipher_generic_initkey(ctx, CHACHA20_KEYLEN * 8,
                                CHACHA20_BLKLEN * 8,
                                CHACHA20_IVLEN * 8,
                                0, CHACHA20_FLAGS,
                                ossl_prov_cipher_hw_chacha20(CHACHA20_KEYLEN * 8),
                                NULL);
}

static void *chacha20_newctx(void *provctx)
{
    PROV_CHACHA20_CTX *ctx;

    if (!ossl_prov_is_running())
        return NULL;

    ctx = OPENSSL_zalloc(sizeof(*ctx));
    if (ctx != NULL)
        ossl_chacha20_initctx(ctx);
    return ctx;
}

static void chacha20_freectx(void *vctx)
{
    PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx;

    if (ctx != NULL) {
        ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
        OPENSSL_clear_free(ctx, sizeof(*ctx));
    }
}

static void *chacha20_dupctx(void *vctx)
{
    PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx;
    PROV_CHACHA20_CTX *dupctx = NULL;

    if (ctx != NULL) {
        dupctx = OPENSSL_memdup(ctx, sizeof(*dupctx));
        if (dupctx != NULL && dupctx->base.tlsmac != NULL && dupctx->base.alloced) {
            dupctx->base.tlsmac = OPENSSL_memdup(dupctx->base.tlsmac,
                                                 dupctx->base.tlsmacsize);
            if (dupctx->base.tlsmac == NULL) {
                OPENSSL_free(dupctx);
                dupctx = NULL;
            }
        }
    }
    return dupctx;
}

static int chacha20_get_params(OSSL_PARAM params[])
{
    return ossl_cipher_generic_get_params(params, 0, CHACHA20_FLAGS,
                                          CHACHA20_KEYLEN * 8,
                                          CHACHA20_BLKLEN * 8,
                                          CHACHA20_IVLEN * 8);
}

static int chacha20_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
    PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx;
    unsigned char ivbuf[CHACHA20_IVLEN];
    OSSL_PARAM *p;

    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_IVLEN)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_KEYLEN)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_UPDATED_IV);
    if (p != NULL) {
        CHACHA_U32TOU8(ivbuf, ctx->counter[0]);
        CHACHA_U32TOU8(ivbuf + 4, ctx->counter[1]);
        CHACHA_U32TOU8(ivbuf + 8, ctx->counter[2]);
        CHACHA_U32TOU8(ivbuf + 12, ctx->counter[3]);
        if (!OSSL_PARAM_set_octet_string(p, ivbuf, CHACHA20_IVLEN)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
            return 0;
        }
    }
    return 1;
}

static const OSSL_PARAM chacha20_known_gettable_ctx_params[] = {
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
    OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_UPDATED_IV, NULL, 0),
    OSSL_PARAM_END
};
const OSSL_PARAM *chacha20_gettable_ctx_params(ossl_unused void *cctx,
                                               ossl_unused void *provctx)
{
    return chacha20_known_gettable_ctx_params;
}

static int chacha20_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
    const OSSL_PARAM *p;
    size_t len;

    if (ossl_param_is_empty(params))
        return 1;

    p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
    if (p != NULL) {
        if (!OSSL_PARAM_get_size_t(p, &len)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        if (len != CHACHA20_KEYLEN) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
            return 0;
        }
    }
    p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
    if (p != NULL) {
        if (!OSSL_PARAM_get_size_t(p, &len)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        if (len != CHACHA20_IVLEN) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
            return 0;
        }
    }
    return 1;
}

static const OSSL_PARAM chacha20_known_settable_ctx_params[] = {
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
    OSSL_PARAM_END
};
const OSSL_PARAM *chacha20_settable_ctx_params(ossl_unused void *cctx,
                                               ossl_unused void *provctx)
{
    return chacha20_known_settable_ctx_params;
}

int ossl_chacha20_einit(void *vctx, const unsigned char *key, size_t keylen,
                        const unsigned char *iv, size_t ivlen,
                        const OSSL_PARAM params[])
{
    int ret;

    /* The generic function checks for ossl_prov_is_running() */
    ret = ossl_cipher_generic_einit(vctx, key, keylen, iv, ivlen, NULL);
    if (ret && iv != NULL) {
        PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
        PROV_CIPHER_HW_CHACHA20 *hw = (PROV_CIPHER_HW_CHACHA20 *)ctx->hw;

        hw->initiv(ctx);
    }
    if (ret && !chacha20_set_ctx_params(vctx, params))
        ret = 0;
    return ret;
}

int ossl_chacha20_dinit(void *vctx, const unsigned char *key, size_t keylen,
                        const unsigned char *iv, size_t ivlen,
                        const OSSL_PARAM params[])
{
    int ret;

    /* The generic function checks for ossl_prov_is_running() */
    ret = ossl_cipher_generic_dinit(vctx, key, keylen, iv, ivlen, NULL);
    if (ret && iv != NULL) {
        PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
        PROV_CIPHER_HW_CHACHA20 *hw = (PROV_CIPHER_HW_CHACHA20 *)ctx->hw;

        hw->initiv(ctx);
    }
    if (ret && !chacha20_set_ctx_params(vctx, params))
        ret = 0;
    return ret;
}

/* ossl_chacha20_functions */
const OSSL_DISPATCH ossl_chacha20_functions[] = {
    { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_newctx },
    { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_freectx },
    { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))chacha20_dupctx },
    { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))ossl_chacha20_einit },
    { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))ossl_chacha20_dinit },
    { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_update },
    { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_final },
    { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_cipher},
    { OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))chacha20_get_params },
    { OSSL_FUNC_CIPHER_GETTABLE_PARAMS, (void (*)(void))chacha20_gettable_params },
    { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))chacha20_get_ctx_params },
    { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
        (void (*)(void))chacha20_gettable_ctx_params },
    { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, (void (*)(void))chacha20_set_ctx_params },
    { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
        (void (*)(void))chacha20_settable_ctx_params },
    OSSL_DISPATCH_END
};


Coverage Report

Created: 2025-06-13 06:56

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2019-2023 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		/* Dispatch functions for chacha20 cipher */
11
12		#include <openssl/proverr.h>
13		#include <openssl/params.h>
14		#include "cipher_chacha20.h"
15		#include "prov/implementations.h"
16		#include "prov/providercommon.h"
17
18	0	#define CHACHA20_KEYLEN (CHACHA_KEY_SIZE)
19	0	#define CHACHA20_BLKLEN (1)
20	0	#define CHACHA20_IVLEN (CHACHA_CTR_SIZE)
21	0	#define CHACHA20_FLAGS (PROV_CIPHER_FLAG_CUSTOM_IV)
22
23		static OSSL_FUNC_cipher_newctx_fn chacha20_newctx;
24		static OSSL_FUNC_cipher_freectx_fn chacha20_freectx;
25		static OSSL_FUNC_cipher_dupctx_fn chacha20_dupctx;
26		static OSSL_FUNC_cipher_get_params_fn chacha20_get_params;
27		static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_get_ctx_params;
28		static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_set_ctx_params;
29		static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_gettable_ctx_params;
30		static OSSL_FUNC_cipher_settable_ctx_params_fn chacha20_settable_ctx_params;
31		#define chacha20_cipher ossl_cipher_generic_cipher
32		#define chacha20_update ossl_cipher_generic_stream_update
33		#define chacha20_final ossl_cipher_generic_stream_final
34		#define chacha20_gettable_params ossl_cipher_generic_gettable_params
35		#define CHACHA_U32TOU8(ct, st) \
36	0	do { \
37	0	(ct)[3] = (unsigned char)((st) >> 24); \
38	0	(ct)[2] = (unsigned char)((st) >> 16); \
39	0	(ct)[1] = (unsigned char)((st) >> 8); \
40	0	(ct)[0] = (unsigned char)(st); \
41	0	} while (0)
42
43		void ossl_chacha20_initctx(PROV_CHACHA20_CTX *ctx)
44	0	{
45	0	ossl_cipher_generic_initkey(ctx, CHACHA20_KEYLEN * 8,
46	0	CHACHA20_BLKLEN * 8,
47	0	CHACHA20_IVLEN * 8,
48	0	0, CHACHA20_FLAGS,
49	0	ossl_prov_cipher_hw_chacha20(CHACHA20_KEYLEN * 8),
50	0	NULL);
51	0	}
52
53		static void chacha20_newctx(void provctx)
54	0	{
55	0	PROV_CHACHA20_CTX *ctx;
56
57	0	if (!ossl_prov_is_running())
58	0	return NULL;
59
60	0	ctx = OPENSSL_zalloc(sizeof(*ctx));
61	0	if (ctx != NULL)
62	0	ossl_chacha20_initctx(ctx);
63	0	return ctx;
64	0	}
65
66		static void chacha20_freectx(void *vctx)
67	0	{
68	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
69
70	0	if (ctx != NULL) {
71	0	ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
72	0	OPENSSL_clear_free(ctx, sizeof(*ctx));
73	0	}
74	0	}
75
76		static void chacha20_dupctx(void vctx)
77	0	{
78	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
79	0	PROV_CHACHA20_CTX *dupctx = NULL;
80
81	0	if (ctx != NULL) {
82	0	dupctx = OPENSSL_memdup(ctx, sizeof(*dupctx));
83	0	if (dupctx != NULL && dupctx->base.tlsmac != NULL && dupctx->base.alloced) {
84	0	dupctx->base.tlsmac = OPENSSL_memdup(dupctx->base.tlsmac,
85	0	dupctx->base.tlsmacsize);
86	0	if (dupctx->base.tlsmac == NULL) {
87	0	OPENSSL_free(dupctx);
88	0	dupctx = NULL;
89	0	}
90	0	}
91	0	}
92	0	return dupctx;
93	0	}
94
95		static int chacha20_get_params(OSSL_PARAM params[])
96	0	{
97	0	return ossl_cipher_generic_get_params(params, 0, CHACHA20_FLAGS,
98	0	CHACHA20_KEYLEN * 8,
99	0	CHACHA20_BLKLEN * 8,
100	0	CHACHA20_IVLEN * 8);
101	0	}
102
103		static int chacha20_get_ctx_params(void *vctx, OSSL_PARAM params[])
104	0	{
105	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
106	0	unsigned char ivbuf[CHACHA20_IVLEN];
107	0	OSSL_PARAM *p;
108
109	0	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
110	0	if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_IVLEN)) {
111	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
112	0	return 0;
113	0	}
114	0	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
115	0	if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_KEYLEN)) {
116	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
117	0	return 0;
118	0	}
119	0	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_UPDATED_IV);
120	0	if (p != NULL) {
121	0	CHACHA_U32TOU8(ivbuf, ctx->counter[0]);
122	0	CHACHA_U32TOU8(ivbuf + 4, ctx->counter[1]);
123	0	CHACHA_U32TOU8(ivbuf + 8, ctx->counter[2]);
124	0	CHACHA_U32TOU8(ivbuf + 12, ctx->counter[3]);
125	0	if (!OSSL_PARAM_set_octet_string(p, ivbuf, CHACHA20_IVLEN)) {
126	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
127	0	return 0;
128	0	}
129	0	}
130	0	return 1;
131	0	}
132
133		static const OSSL_PARAM chacha20_known_gettable_ctx_params[] = {
134		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
135		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
136		OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_UPDATED_IV, NULL, 0),
137		OSSL_PARAM_END
138		};
139		const OSSL_PARAM chacha20_gettable_ctx_params(ossl_unused void cctx,
140		ossl_unused void *provctx)
141	0	{
142	0	return chacha20_known_gettable_ctx_params;
143	0	}
144
145		static int chacha20_set_ctx_params(void *vctx, const OSSL_PARAM params[])
146	0	{
147	0	const OSSL_PARAM *p;
148	0	size_t len;
149
150	0	if (ossl_param_is_empty(params))
151	0	return 1;
152
153	0	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
154	0	if (p != NULL) {
155	0	if (!OSSL_PARAM_get_size_t(p, &len)) {
156	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
157	0	return 0;
158	0	}
159	0	if (len != CHACHA20_KEYLEN) {
160	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
161	0	return 0;
162	0	}
163	0	}
164	0	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
165	0	if (p != NULL) {
166	0	if (!OSSL_PARAM_get_size_t(p, &len)) {
167	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
168	0	return 0;
169	0	}
170	0	if (len != CHACHA20_IVLEN) {
171	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
172	0	return 0;
173	0	}
174	0	}
175	0	return 1;
176	0	}
177
178		static const OSSL_PARAM chacha20_known_settable_ctx_params[] = {
179		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
180		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
181		OSSL_PARAM_END
182		};
183		const OSSL_PARAM chacha20_settable_ctx_params(ossl_unused void cctx,
184		ossl_unused void *provctx)
185	0	{
186	0	return chacha20_known_settable_ctx_params;
187	0	}
188
189		int ossl_chacha20_einit(void vctx, const unsigned char key, size_t keylen,
190		const unsigned char *iv, size_t ivlen,
191		const OSSL_PARAM params[])
192	0	{
193	0	int ret;
194
195		/* The generic function checks for ossl_prov_is_running() */
196	0	ret = ossl_cipher_generic_einit(vctx, key, keylen, iv, ivlen, NULL);
197	0	if (ret && iv != NULL) {
198	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
199	0	PROV_CIPHER_HW_CHACHA20 hw = (PROV_CIPHER_HW_CHACHA20 )ctx->hw;
200
201	0	hw->initiv(ctx);
202	0	}
203	0	if (ret && !chacha20_set_ctx_params(vctx, params))
204	0	ret = 0;
205	0	return ret;
206	0	}
207
208		int ossl_chacha20_dinit(void vctx, const unsigned char key, size_t keylen,
209		const unsigned char *iv, size_t ivlen,
210		const OSSL_PARAM params[])
211	0	{
212	0	int ret;
213
214		/* The generic function checks for ossl_prov_is_running() */
215	0	ret = ossl_cipher_generic_dinit(vctx, key, keylen, iv, ivlen, NULL);
216	0	if (ret && iv != NULL) {
217	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
218	0	PROV_CIPHER_HW_CHACHA20 hw = (PROV_CIPHER_HW_CHACHA20 )ctx->hw;
219
220	0	hw->initiv(ctx);
221	0	}
222	0	if (ret && !chacha20_set_ctx_params(vctx, params))
223	0	ret = 0;
224	0	return ret;
225	0	}
226
227		/* ossl_chacha20_functions */
228		const OSSL_DISPATCH ossl_chacha20_functions[] = {
229		{ OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_newctx },
230		{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_freectx },
231		{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))chacha20_dupctx },
232		{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))ossl_chacha20_einit },
233		{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))ossl_chacha20_dinit },
234		{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_update },
235		{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_final },
236		{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_cipher},
237		{ OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))chacha20_get_params },
238		{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS, (void (*)(void))chacha20_gettable_params },
239		{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))chacha20_get_ctx_params },
240		{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
241		(void (*)(void))chacha20_gettable_ctx_params },
242		{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS, (void (*)(void))chacha20_set_ctx_params },
243		{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
244		(void (*)(void))chacha20_settable_ctx_params },
245		OSSL_DISPATCH_END
246		};
247