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

Source
/*
 * Copyright 2019-2025 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
 */


/* 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);
}

/* Machine generated by util/perl/OpenSSL/paramnames.pm */
#ifndef chacha20_get_ctx_params_list
static const OSSL_PARAM chacha20_get_ctx_params_list[] = {
    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
};
#endif

#ifndef chacha20_get_ctx_params_st
struct chacha20_get_ctx_params_st {
    OSSL_PARAM *ivlen;
    OSSL_PARAM *keylen;
    OSSL_PARAM *upd_iv;
};
#endif

#ifndef chacha20_get_ctx_params_decoder
static int chacha20_get_ctx_params_decoder
    (const OSSL_PARAM *p, struct chacha20_get_ctx_params_st *r)
{
    const char *s;

    memset(r, 0, sizeof(*r));
    if (p != NULL)
        for (; (s = p->key) != NULL; p++)
            switch(s[0]) {
            default:
                break;
            case 'i':
                if (ossl_likely(strcmp("vlen", s + 1) == 0)) {
                    /* OSSL_CIPHER_PARAM_IVLEN */
                    if (ossl_unlikely(r->ivlen != NULL)) {
                        ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
                                       "param %s is repeated", s);
                        return 0;
                    }
                    r->ivlen = (OSSL_PARAM *)p;
                }
                break;
            case 'k':
                if (ossl_likely(strcmp("eylen", s + 1) == 0)) {
                    /* OSSL_CIPHER_PARAM_KEYLEN */
                    if (ossl_unlikely(r->keylen != NULL)) {
                        ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
                                       "param %s is repeated", s);
                        return 0;
                    }
                    r->keylen = (OSSL_PARAM *)p;
                }
                break;
            case 'u':
                if (ossl_likely(strcmp("pdated-iv", s + 1) == 0)) {
                    /* OSSL_CIPHER_PARAM_UPDATED_IV */
                    if (ossl_unlikely(r->upd_iv != NULL)) {
                        ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
                                       "param %s is repeated", s);
                        return 0;
                    }
                    r->upd_iv = (OSSL_PARAM *)p;
                }
            }
    return 1;
}
#endif
/* End of machine generated */

static int chacha20_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
    PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx;
    unsigned char ivbuf[CHACHA20_IVLEN];
    struct chacha20_get_ctx_params_st p;

    if (ctx == NULL || !chacha20_get_ctx_params_decoder(params, &p))
        return 0;

    if (p.ivlen != NULL && !OSSL_PARAM_set_size_t(p.ivlen, CHACHA20_IVLEN)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p.keylen != NULL && !OSSL_PARAM_set_size_t(p.keylen, CHACHA20_KEYLEN)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p.upd_iv != 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.upd_iv, ivbuf, CHACHA20_IVLEN)) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
            return 0;
        }
    }
    return 1;
}

const OSSL_PARAM *chacha20_gettable_ctx_params(ossl_unused void *cctx,
                                               ossl_unused void *provctx)
{
    return chacha20_get_ctx_params_list;
}

/* Machine generated by util/perl/OpenSSL/paramnames.pm */
#ifndef chacha20_set_ctx_params_list
static const OSSL_PARAM chacha20_set_ctx_params_list[] = {
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
    OSSL_PARAM_END
};
#endif

#ifndef chacha20_set_ctx_params_st
struct chacha20_set_ctx_params_st {
    OSSL_PARAM *ivlen;
    OSSL_PARAM *keylen;
};
#endif

#ifndef chacha20_set_ctx_params_decoder
static int chacha20_set_ctx_params_decoder
    (const OSSL_PARAM *p, struct chacha20_set_ctx_params_st *r)
{
    const char *s;

    memset(r, 0, sizeof(*r));
    if (p != NULL)
        for (; (s = p->key) != NULL; p++)
            switch(s[0]) {
            default:
                break;
            case 'i':
                if (ossl_likely(strcmp("vlen", s + 1) == 0)) {
                    /* OSSL_CIPHER_PARAM_IVLEN */
                    if (ossl_unlikely(r->ivlen != NULL)) {
                        ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
                                       "param %s is repeated", s);
                        return 0;
                    }
                    r->ivlen = (OSSL_PARAM *)p;
                }
                break;
            case 'k':
                if (ossl_likely(strcmp("eylen", s + 1) == 0)) {
                    /* OSSL_CIPHER_PARAM_KEYLEN */
                    if (ossl_unlikely(r->keylen != NULL)) {
                        ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
                                       "param %s is repeated", s);
                        return 0;
                    }
                    r->keylen = (OSSL_PARAM *)p;
                }
            }
    return 1;
}
#endif
/* End of machine generated */

static int chacha20_set_ctx_params(void *vctx, const OSSL_PARAM params[])
{
    PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx;
    struct chacha20_set_ctx_params_st p;
    size_t len;

    if (ctx == NULL || !chacha20_set_ctx_params_decoder(params, &p))
        return 0;

    if (p.keylen != NULL) {
        if (!OSSL_PARAM_get_size_t(p.keylen, &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;
        }
    }

    if (p.ivlen != NULL) {
        if (!OSSL_PARAM_get_size_t(p.ivlen, &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;
}

const OSSL_PARAM *chacha20_settable_ctx_params(ossl_unused void *cctx,
                                               ossl_unused void *provctx)
{
    return chacha20_set_ctx_params_list;
}

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: 2025-10-10 07:01

Line	Count	Source
1		/*
2		* Copyright 2019-2025 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		/* Dispatch functions for chacha20 cipher */
12
13		#include <openssl/proverr.h>
14		#include <openssl/params.h>
15		#include "cipher_chacha20.h"
16		#include "prov/implementations.h"
17		#include "prov/providercommon.h"
18
19	16	#define CHACHA20_KEYLEN (CHACHA_KEY_SIZE)
20	16	#define CHACHA20_BLKLEN (1)
21	16	#define CHACHA20_IVLEN (CHACHA_CTR_SIZE)
22	16	#define CHACHA20_FLAGS (PROV_CIPHER_FLAG_CUSTOM_IV)
23
24		static OSSL_FUNC_cipher_newctx_fn chacha20_newctx;
25		static OSSL_FUNC_cipher_freectx_fn chacha20_freectx;
26		static OSSL_FUNC_cipher_dupctx_fn chacha20_dupctx;
27		static OSSL_FUNC_cipher_get_params_fn chacha20_get_params;
28		static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_get_ctx_params;
29		static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_set_ctx_params;
30		static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_gettable_ctx_params;
31		static OSSL_FUNC_cipher_settable_ctx_params_fn chacha20_settable_ctx_params;
32		#define chacha20_cipher ossl_cipher_generic_cipher
33		#define chacha20_update ossl_cipher_generic_stream_update
34		#define chacha20_final ossl_cipher_generic_stream_final
35		#define chacha20_gettable_params ossl_cipher_generic_gettable_params
36		#define CHACHA_U32TOU8(ct, st) \
37	0	do { \
38	0	(ct)[3] = (unsigned char)((st) >> 24); \
39	0	(ct)[2] = (unsigned char)((st) >> 16); \
40	0	(ct)[1] = (unsigned char)((st) >> 8); \
41	0	(ct)[0] = (unsigned char)(st); \
42	0	} while (0)
43
44		void ossl_chacha20_initctx(PROV_CHACHA20_CTX *ctx)
45	0	{
46	0	ossl_cipher_generic_initkey(ctx, CHACHA20_KEYLEN * 8,
47	0	CHACHA20_BLKLEN * 8,
48	0	CHACHA20_IVLEN * 8,
49	0	0, CHACHA20_FLAGS,
50	0	ossl_prov_cipher_hw_chacha20(CHACHA20_KEYLEN * 8),
51	0	NULL);
52	0	}
53
54		static void chacha20_newctx(void provctx)
55	0	{
56	0	PROV_CHACHA20_CTX *ctx;
57
58	0	if (!ossl_prov_is_running())
59	0	return NULL;
60
61	0	ctx = OPENSSL_zalloc(sizeof(*ctx));
62	0	if (ctx != NULL)
63	0	ossl_chacha20_initctx(ctx);
64	0	return ctx;
65	0	}
66
67		static void chacha20_freectx(void *vctx)
68	0	{
69	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
70
71	0	if (ctx != NULL) {
72	0	ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
73	0	OPENSSL_clear_free(ctx, sizeof(*ctx));
74	0	}
75	0	}
76
77		static void chacha20_dupctx(void vctx)
78	0	{
79	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
80	0	PROV_CHACHA20_CTX *dupctx = NULL;
81
82	0	if (ctx != NULL) {
83	0	dupctx = OPENSSL_memdup(ctx, sizeof(*dupctx));
84	0	if (dupctx != NULL && dupctx->base.tlsmac != NULL && dupctx->base.alloced) {
85	0	dupctx->base.tlsmac = OPENSSL_memdup(dupctx->base.tlsmac,
86	0	dupctx->base.tlsmacsize);
87	0	if (dupctx->base.tlsmac == NULL) {
88	0	OPENSSL_free(dupctx);
89	0	dupctx = NULL;
90	0	}
91	0	}
92	0	}
93	0	return dupctx;
94	0	}
95
96		static int chacha20_get_params(OSSL_PARAM params[])
97	16	{
98	16	return ossl_cipher_generic_get_params(params, 0, CHACHA20_FLAGS,
99	16	CHACHA20_KEYLEN * 8,
100	16	CHACHA20_BLKLEN * 8,
101	16	CHACHA20_IVLEN * 8);
102	16	}
103
104		/* Machine generated by util/perl/OpenSSL/paramnames.pm */
105		#ifndef chacha20_get_ctx_params_list
106		static const OSSL_PARAM chacha20_get_ctx_params_list[] = {
107		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
108		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
109		OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_UPDATED_IV, NULL, 0),
110		OSSL_PARAM_END
111		};
112		#endif
113
114		#ifndef chacha20_get_ctx_params_st
115		struct chacha20_get_ctx_params_st {
116		OSSL_PARAM *ivlen;
117		OSSL_PARAM *keylen;
118		OSSL_PARAM *upd_iv;
119		};
120		#endif
121
122		#ifndef chacha20_get_ctx_params_decoder
123		static int chacha20_get_ctx_params_decoder
124		(const OSSL_PARAM p, struct chacha20_get_ctx_params_st r)
125	0	{
126	0	const char *s;
127
128	0	memset(r, 0, sizeof(*r));
129	0	if (p != NULL)
130	0	for (; (s = p->key) != NULL; p++)
131	0	switch(s[0]) {
132	0	default:
133	0	break;
134	0	case 'i':
135	0	if (ossl_likely(strcmp("vlen", s + 1) == 0)) {
136		/* OSSL_CIPHER_PARAM_IVLEN */
137	0	if (ossl_unlikely(r->ivlen != NULL)) {
138	0	ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
139	0	"param %s is repeated", s);
140	0	return 0;
141	0	}
142	0	r->ivlen = (OSSL_PARAM *)p;
143	0	}
144	0	break;
145	0	case 'k':
146	0	if (ossl_likely(strcmp("eylen", s + 1) == 0)) {
147		/* OSSL_CIPHER_PARAM_KEYLEN */
148	0	if (ossl_unlikely(r->keylen != NULL)) {
149	0	ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
150	0	"param %s is repeated", s);
151	0	return 0;
152	0	}
153	0	r->keylen = (OSSL_PARAM *)p;
154	0	}
155	0	break;
156	0	case 'u':
157	0	if (ossl_likely(strcmp("pdated-iv", s + 1) == 0)) {
158		/* OSSL_CIPHER_PARAM_UPDATED_IV */
159	0	if (ossl_unlikely(r->upd_iv != NULL)) {
160	0	ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
161	0	"param %s is repeated", s);
162	0	return 0;
163	0	}
164	0	r->upd_iv = (OSSL_PARAM *)p;
165	0	}
166	0	}
167	0	return 1;
168	0	}
169		#endif
170		/* End of machine generated */
171
172		static int chacha20_get_ctx_params(void *vctx, OSSL_PARAM params[])
173	0	{
174	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
175	0	unsigned char ivbuf[CHACHA20_IVLEN];
176	0	struct chacha20_get_ctx_params_st p;
177
178	0	if (ctx == NULL \|\| !chacha20_get_ctx_params_decoder(params, &p))
179	0	return 0;
180
181	0	if (p.ivlen != NULL && !OSSL_PARAM_set_size_t(p.ivlen, CHACHA20_IVLEN)) {
182	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
183	0	return 0;
184	0	}
185
186	0	if (p.keylen != NULL && !OSSL_PARAM_set_size_t(p.keylen, CHACHA20_KEYLEN)) {
187	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
188	0	return 0;
189	0	}
190
191	0	if (p.upd_iv != NULL) {
192	0	CHACHA_U32TOU8(ivbuf, ctx->counter[0]);
193	0	CHACHA_U32TOU8(ivbuf + 4, ctx->counter[1]);
194	0	CHACHA_U32TOU8(ivbuf + 8, ctx->counter[2]);
195	0	CHACHA_U32TOU8(ivbuf + 12, ctx->counter[3]);
196	0	if (!OSSL_PARAM_set_octet_string(p.upd_iv, ivbuf, CHACHA20_IVLEN)) {
197	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
198	0	return 0;
199	0	}
200	0	}
201	0	return 1;
202	0	}
203
204		const OSSL_PARAM chacha20_gettable_ctx_params(ossl_unused void cctx,
205		ossl_unused void *provctx)
206	16	{
207	16	return chacha20_get_ctx_params_list;
208	16	}
209
210		/* Machine generated by util/perl/OpenSSL/paramnames.pm */
211		#ifndef chacha20_set_ctx_params_list
212		static const OSSL_PARAM chacha20_set_ctx_params_list[] = {
213		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
214		OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
215		OSSL_PARAM_END
216		};
217		#endif
218
219		#ifndef chacha20_set_ctx_params_st
220		struct chacha20_set_ctx_params_st {
221		OSSL_PARAM *ivlen;
222		OSSL_PARAM *keylen;
223		};
224		#endif
225
226		#ifndef chacha20_set_ctx_params_decoder
227		static int chacha20_set_ctx_params_decoder
228		(const OSSL_PARAM p, struct chacha20_set_ctx_params_st r)
229	0	{
230	0	const char *s;
231
232	0	memset(r, 0, sizeof(*r));
233	0	if (p != NULL)
234	0	for (; (s = p->key) != NULL; p++)
235	0	switch(s[0]) {
236	0	default:
237	0	break;
238	0	case 'i':
239	0	if (ossl_likely(strcmp("vlen", s + 1) == 0)) {
240		/* OSSL_CIPHER_PARAM_IVLEN */
241	0	if (ossl_unlikely(r->ivlen != NULL)) {
242	0	ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
243	0	"param %s is repeated", s);
244	0	return 0;
245	0	}
246	0	r->ivlen = (OSSL_PARAM *)p;
247	0	}
248	0	break;
249	0	case 'k':
250	0	if (ossl_likely(strcmp("eylen", s + 1) == 0)) {
251		/* OSSL_CIPHER_PARAM_KEYLEN */
252	0	if (ossl_unlikely(r->keylen != NULL)) {
253	0	ERR_raise_data(ERR_LIB_PROV, PROV_R_REPEATED_PARAMETER,
254	0	"param %s is repeated", s);
255	0	return 0;
256	0	}
257	0	r->keylen = (OSSL_PARAM *)p;
258	0	}
259	0	}
260	0	return 1;
261	0	}
262		#endif
263		/* End of machine generated */
264
265		static int chacha20_set_ctx_params(void *vctx, const OSSL_PARAM params[])
266	0	{
267	0	PROV_CHACHA20_CTX ctx = (PROV_CHACHA20_CTX )vctx;
268	0	struct chacha20_set_ctx_params_st p;
269	0	size_t len;
270
271	0	if (ctx == NULL \|\| !chacha20_set_ctx_params_decoder(params, &p))
272	0	return 0;
273
274	0	if (p.keylen != NULL) {
275	0	if (!OSSL_PARAM_get_size_t(p.keylen, &len)) {
276	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
277	0	return 0;
278	0	}
279	0	if (len != CHACHA20_KEYLEN) {
280	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
281	0	return 0;
282	0	}
283	0	}
284
285	0	if (p.ivlen != NULL) {
286	0	if (!OSSL_PARAM_get_size_t(p.ivlen, &len)) {
287	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
288	0	return 0;
289	0	}
290	0	if (len != CHACHA20_IVLEN) {
291	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
292	0	return 0;
293	0	}
294	0	}
295	0	return 1;
296	0	}
297
298		const OSSL_PARAM chacha20_settable_ctx_params(ossl_unused void cctx,
299		ossl_unused void *provctx)
300	0	{
301	0	return chacha20_set_ctx_params_list;
302	0	}
303
304		int ossl_chacha20_einit(void vctx, const unsigned char key, size_t keylen,
305		const unsigned char *iv, size_t ivlen,
306		const OSSL_PARAM params[])
307	0	{
308	0	int ret;
309
310		/* The generic function checks for ossl_prov_is_running() */
311	0	ret = ossl_cipher_generic_einit(vctx, key, keylen, iv, ivlen, NULL);
312	0	if (ret && iv != NULL) {
313	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
314	0	PROV_CIPHER_HW_CHACHA20 hw = (PROV_CIPHER_HW_CHACHA20 )ctx->hw;
315
316	0	hw->initiv(ctx);
317	0	}
318	0	if (ret && !chacha20_set_ctx_params(vctx, params))
319	0	ret = 0;
320	0	return ret;
321	0	}
322
323		int ossl_chacha20_dinit(void vctx, const unsigned char key, size_t keylen,
324		const unsigned char *iv, size_t ivlen,
325		const OSSL_PARAM params[])
326	0	{
327	0	int ret;
328
329		/* The generic function checks for ossl_prov_is_running() */
330	0	ret = ossl_cipher_generic_dinit(vctx, key, keylen, iv, ivlen, NULL);
331	0	if (ret && iv != NULL) {
332	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
333	0	PROV_CIPHER_HW_CHACHA20 hw = (PROV_CIPHER_HW_CHACHA20 )ctx->hw;
334
335	0	hw->initiv(ctx);
336	0	}
337	0	if (ret && !chacha20_set_ctx_params(vctx, params))
338	0	ret = 0;
339	0	return ret;
340	0	}
341
342		/* ossl_chacha20_functions */
343		const OSSL_DISPATCH ossl_chacha20_functions[] = {
344		{ OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_newctx },
345		{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_freectx },
346		{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))chacha20_dupctx },
347		{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))ossl_chacha20_einit },
348		{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))ossl_chacha20_dinit },
349		{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_update },
350		{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_final },
351		{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_cipher},
352		{ OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))chacha20_get_params },
353		{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS, (void (*)(void))chacha20_gettable_params },
354		{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))chacha20_get_ctx_params },
355		{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
356		(void (*)(void))chacha20_gettable_ctx_params },
357		{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS, (void (*)(void))chacha20_set_ctx_params },
358		{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
359		(void (*)(void))chacha20_settable_ctx_params },
360		OSSL_DISPATCH_END
361		};
362