/src/openssl/providers/implementations/ciphers/cipher_chacha20_poly1305.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_poly1305 cipher */

#include <string.h>
#include <openssl/proverr.h>
#include "cipher_chacha20_poly1305.h"
#include "prov/implementations.h"
#include "prov/providercommon.h"
#include "providers/implementations/ciphers/cipher_chacha20_poly1305.inc"

#define CHACHA20_POLY1305_KEYLEN CHACHA_KEY_SIZE
#define CHACHA20_POLY1305_BLKLEN 1
#define CHACHA20_POLY1305_MAX_IVLEN 12
#define CHACHA20_POLY1305_MODE 0
#define CHACHA20_POLY1305_FLAGS (PROV_CIPHER_FLAG_AEAD                         \
                                 | PROV_CIPHER_FLAG_CUSTOM_IV)

static OSSL_FUNC_cipher_newctx_fn chacha20_poly1305_newctx;
static OSSL_FUNC_cipher_freectx_fn chacha20_poly1305_freectx;
static OSSL_FUNC_cipher_dupctx_fn chacha20_poly1305_dupctx;
static OSSL_FUNC_cipher_encrypt_init_fn chacha20_poly1305_einit;
static OSSL_FUNC_cipher_decrypt_init_fn chacha20_poly1305_dinit;
static OSSL_FUNC_cipher_get_params_fn chacha20_poly1305_get_params;
static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_poly1305_get_ctx_params;
static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_poly1305_set_ctx_params;
static OSSL_FUNC_cipher_cipher_fn chacha20_poly1305_cipher;
static OSSL_FUNC_cipher_final_fn chacha20_poly1305_final;
static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_poly1305_gettable_ctx_params;
static OSSL_FUNC_cipher_settable_ctx_params_fn chacha20_poly1305_settable_ctx_params;
#define chacha20_poly1305_gettable_params ossl_cipher_generic_gettable_params
#define chacha20_poly1305_update chacha20_poly1305_cipher

static void *chacha20_poly1305_newctx(void *provctx)
{
    PROV_CHACHA20_POLY1305_CTX *ctx;

    if (!ossl_prov_is_running())
        return NULL;

    ctx = OPENSSL_zalloc(sizeof(*ctx));
    if (ctx != NULL) {
        ossl_cipher_generic_initkey(&ctx->base, CHACHA20_POLY1305_KEYLEN * 8,
                                    CHACHA20_POLY1305_BLKLEN * 8,
                                    CHACHA20_POLY1305_IVLEN * 8,
                                    CHACHA20_POLY1305_MODE,
                                    CHACHA20_POLY1305_FLAGS,
                                    ossl_prov_cipher_hw_chacha20_poly1305(
                                        CHACHA20_POLY1305_KEYLEN * 8),
                                    NULL);
        ctx->tls_payload_length = NO_TLS_PAYLOAD_LENGTH;
        ossl_chacha20_initctx(&ctx->chacha);
    }
    return ctx;
}

static void *chacha20_poly1305_dupctx(void *provctx)
{
    PROV_CHACHA20_POLY1305_CTX *ctx = provctx;
    PROV_CHACHA20_POLY1305_CTX *dctx = NULL;

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

static void chacha20_poly1305_freectx(void *vctx)
{
    PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;

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

static int chacha20_poly1305_get_params(OSSL_PARAM params[])
{
    return ossl_cipher_generic_get_params(params, 0, CHACHA20_POLY1305_FLAGS,
                                          CHACHA20_POLY1305_KEYLEN * 8,
                                          CHACHA20_POLY1305_BLKLEN * 8,
                                          CHACHA20_POLY1305_IVLEN * 8);
}

static int chacha20_poly1305_get_ctx_params(void *vctx, OSSL_PARAM params[])
{
    PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;
    struct chacha20_poly1305_get_ctx_params_st p;

    if (ctx == NULL || !chacha20_poly1305_get_ctx_params_decoder(params, &p))
        return 0;

    if (p.ivlen != NULL
            && !OSSL_PARAM_set_size_t(p.ivlen, CHACHA20_POLY1305_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_POLY1305_KEYLEN)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p.taglen != NULL
            && !OSSL_PARAM_set_size_t(p.taglen, ctx->tag_len)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p.pad != NULL
            && !OSSL_PARAM_set_size_t(p.pad, ctx->tls_aad_pad_sz)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    if (p.tag != NULL) {
        if (p.tag->data_type != OSSL_PARAM_OCTET_STRING) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
            return 0;
        }
        if (!ctx->base.enc) {
            ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_SET);
            return 0;
        }
        if (p.tag->data_size == 0 || p.tag->data_size > POLY1305_BLOCK_SIZE) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAG_LENGTH);
            return 0;
        }
        memcpy(p.tag->data, ctx->tag, p.tag->data_size);
    }
    return 1;
}

static const OSSL_PARAM *chacha20_poly1305_gettable_ctx_params
    (ossl_unused void *cctx, ossl_unused void *provctx)
{
    return chacha20_poly1305_get_ctx_params_list;
}

static const OSSL_PARAM *chacha20_poly1305_settable_ctx_params(
        ossl_unused void *cctx, ossl_unused void *provctx
    )
{
    return chacha20_poly1305_set_ctx_params_list;
}

static int chacha20_poly1305_set_ctx_params(void *vctx,
                                            const OSSL_PARAM params[])
{
    size_t len;
    PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;
    PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
        (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->base.hw;
    struct chacha20_poly1305_set_ctx_params_st p;

    if (!chacha20_poly1305_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_POLY1305_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_POLY1305_MAX_IVLEN) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
            return 0;
        }
    }

    if (p.tag != NULL) {
        if (p.tag->data_type != OSSL_PARAM_OCTET_STRING) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        if (p.tag->data_size == 0 || p.tag->data_size > POLY1305_BLOCK_SIZE) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAG_LENGTH);
            return 0;
        }
        if (p.tag->data != NULL) {
            if (ctx->base.enc) {
                ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_NEEDED);
                return 0;
            }
            memcpy(ctx->tag, p.tag->data, p.tag->data_size);
        }
        ctx->tag_len = p.tag->data_size;
    }

    if (p.aad != NULL) {
        if (p.aad->data_type != OSSL_PARAM_OCTET_STRING) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        len = hw->tls_init(&ctx->base, p.aad->data, p.aad->data_size);
        if (len == 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DATA);
            return 0;
        }
        ctx->tls_aad_pad_sz = len;
    }

    if (p.fixed != NULL) {
        if (p.fixed->data_type != OSSL_PARAM_OCTET_STRING) {
            ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
            return 0;
        }
        if (hw->tls_iv_set_fixed(&ctx->base, p.fixed->data,
                                 p.fixed->data_size) == 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
            return 0;
        }
    }
    return 1;
}

static int chacha20_poly1305_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_POLY1305 *hw =
            (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;

        hw->initiv(ctx);
    }
    if (ret && !chacha20_poly1305_set_ctx_params(vctx, params))
        ret = 0;
    return ret;
}

static int chacha20_poly1305_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_POLY1305 *hw =
            (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;

        hw->initiv(ctx);
    }
    if (ret && !chacha20_poly1305_set_ctx_params(vctx, params))
        ret = 0;
    return ret;
}

static int chacha20_poly1305_cipher(void *vctx, unsigned char *out,
                                    size_t *outl, size_t outsize,
                                    const unsigned char *in, size_t inl)
{
    PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
    PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
        (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;

    if (!ossl_prov_is_running())
        return 0;

    if (inl == 0) {
        *outl = 0;
        return 1;
    }

    if (outsize < inl) {
        ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
        return 0;
    }

    if (!hw->aead_cipher(ctx, out, outl, in, inl))
        return 0;

    return 1;
}

static int chacha20_poly1305_final(void *vctx, unsigned char *out, size_t *outl,
                                   size_t outsize)
{
    PROV_CHACHA20_POLY1305_CTX *ctx = (PROV_CHACHA20_POLY1305_CTX *)vctx;
    PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
        (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->base.hw;

    if (!ossl_prov_is_running())
        return 0;

    /* The tag must be set before actually decrypting data */
    if (!ctx->base.enc && ctx->tag_len == 0) {
        ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_SET);
        return 0;
    }

    if (hw->aead_cipher((PROV_CIPHER_CTX *)ctx, out, outl, NULL, 0) <= 0)
        return 0;

    *outl = 0;
    return 1;
}

/* ossl_chacha20_ossl_poly1305_functions */
const OSSL_DISPATCH ossl_chacha20_ossl_poly1305_functions[] = {
    { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_poly1305_newctx },
    { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_poly1305_freectx },
    { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))chacha20_poly1305_dupctx },
    { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))chacha20_poly1305_einit },
    { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))chacha20_poly1305_dinit },
    { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_poly1305_update },
    { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_poly1305_final },
    { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_poly1305_cipher },
    { OSSL_FUNC_CIPHER_GET_PARAMS,
        (void (*)(void))chacha20_poly1305_get_params },
    { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,
        (void (*)(void))chacha20_poly1305_gettable_params },
    { OSSL_FUNC_CIPHER_GET_CTX_PARAMS,
         (void (*)(void))chacha20_poly1305_get_ctx_params },
    { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
        (void (*)(void))chacha20_poly1305_gettable_ctx_params },
    { OSSL_FUNC_CIPHER_SET_CTX_PARAMS,
        (void (*)(void))chacha20_poly1305_set_ctx_params },
    { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
        (void (*)(void))chacha20_poly1305_settable_ctx_params },
    OSSL_DISPATCH_END
};

Coverage Report

Created: 2025-11-07 06:58

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		/* Dispatch functions for chacha20_poly1305 cipher */
11
12		#include <string.h>
13		#include <openssl/proverr.h>
14		#include "cipher_chacha20_poly1305.h"
15		#include "prov/implementations.h"
16		#include "prov/providercommon.h"
17		#include "providers/implementations/ciphers/cipher_chacha20_poly1305.inc"
18
19	1	#define CHACHA20_POLY1305_KEYLEN CHACHA_KEY_SIZE
20	1	#define CHACHA20_POLY1305_BLKLEN 1
21	0	#define CHACHA20_POLY1305_MAX_IVLEN 12
22	0	#define CHACHA20_POLY1305_MODE 0
23	1	#define CHACHA20_POLY1305_FLAGS (PROV_CIPHER_FLAG_AEAD \
24	1	\| PROV_CIPHER_FLAG_CUSTOM_IV)
25
26		static OSSL_FUNC_cipher_newctx_fn chacha20_poly1305_newctx;
27		static OSSL_FUNC_cipher_freectx_fn chacha20_poly1305_freectx;
28		static OSSL_FUNC_cipher_dupctx_fn chacha20_poly1305_dupctx;
29		static OSSL_FUNC_cipher_encrypt_init_fn chacha20_poly1305_einit;
30		static OSSL_FUNC_cipher_decrypt_init_fn chacha20_poly1305_dinit;
31		static OSSL_FUNC_cipher_get_params_fn chacha20_poly1305_get_params;
32		static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_poly1305_get_ctx_params;
33		static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_poly1305_set_ctx_params;
34		static OSSL_FUNC_cipher_cipher_fn chacha20_poly1305_cipher;
35		static OSSL_FUNC_cipher_final_fn chacha20_poly1305_final;
36		static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_poly1305_gettable_ctx_params;
37		static OSSL_FUNC_cipher_settable_ctx_params_fn chacha20_poly1305_settable_ctx_params;
38		#define chacha20_poly1305_gettable_params ossl_cipher_generic_gettable_params
39		#define chacha20_poly1305_update chacha20_poly1305_cipher
40
41		static void chacha20_poly1305_newctx(void provctx)
42	0	{
43	0	PROV_CHACHA20_POLY1305_CTX *ctx;
44
45	0	if (!ossl_prov_is_running())
46	0	return NULL;
47
48	0	ctx = OPENSSL_zalloc(sizeof(*ctx));
49	0	if (ctx != NULL) {
50	0	ossl_cipher_generic_initkey(&ctx->base, CHACHA20_POLY1305_KEYLEN * 8,
51	0	CHACHA20_POLY1305_BLKLEN * 8,
52	0	CHACHA20_POLY1305_IVLEN * 8,
53	0	CHACHA20_POLY1305_MODE,
54	0	CHACHA20_POLY1305_FLAGS,
55	0	ossl_prov_cipher_hw_chacha20_poly1305(
56	0	CHACHA20_POLY1305_KEYLEN * 8),
57	0	NULL);
58	0	ctx->tls_payload_length = NO_TLS_PAYLOAD_LENGTH;
59	0	ossl_chacha20_initctx(&ctx->chacha);
60	0	}
61	0	return ctx;
62	0	}
63
64		static void chacha20_poly1305_dupctx(void provctx)
65	0	{
66	0	PROV_CHACHA20_POLY1305_CTX *ctx = provctx;
67	0	PROV_CHACHA20_POLY1305_CTX *dctx = NULL;
68
69	0	if (ctx == NULL)
70	0	return NULL;
71	0	dctx = OPENSSL_memdup(ctx, sizeof(*ctx));
72	0	if (dctx != NULL && dctx->base.tlsmac != NULL && dctx->base.alloced) {
73	0	dctx->base.tlsmac = OPENSSL_memdup(dctx->base.tlsmac,
74	0	dctx->base.tlsmacsize);
75	0	if (dctx->base.tlsmac == NULL) {
76	0	OPENSSL_free(dctx);
77	0	dctx = NULL;
78	0	}
79	0	}
80	0	return dctx;
81	0	}
82
83		static void chacha20_poly1305_freectx(void *vctx)
84	0	{
85	0	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
86
87	0	if (ctx != NULL) {
88	0	ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
89	0	OPENSSL_clear_free(ctx, sizeof(*ctx));
90	0	}
91	0	}
92
93		static int chacha20_poly1305_get_params(OSSL_PARAM params[])
94	1	{
95	1	return ossl_cipher_generic_get_params(params, 0, CHACHA20_POLY1305_FLAGS,
96	1	CHACHA20_POLY1305_KEYLEN * 8,
97	1	CHACHA20_POLY1305_BLKLEN * 8,
98	1	CHACHA20_POLY1305_IVLEN * 8);
99	1	}
100
101		static int chacha20_poly1305_get_ctx_params(void *vctx, OSSL_PARAM params[])
102	0	{
103	0	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
104	0	struct chacha20_poly1305_get_ctx_params_st p;
105
106	0	if (ctx == NULL \|\| !chacha20_poly1305_get_ctx_params_decoder(params, &p))
107	0	return 0;
108
109	0	if (p.ivlen != NULL
110	0	&& !OSSL_PARAM_set_size_t(p.ivlen, CHACHA20_POLY1305_IVLEN)) {
111	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
112	0	return 0;
113	0	}
114
115	0	if (p.keylen != NULL
116	0	&& !OSSL_PARAM_set_size_t(p.keylen, CHACHA20_POLY1305_KEYLEN)) {
117	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
118	0	return 0;
119	0	}
120
121	0	if (p.taglen != NULL
122	0	&& !OSSL_PARAM_set_size_t(p.taglen, ctx->tag_len)) {
123	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
124	0	return 0;
125	0	}
126
127	0	if (p.pad != NULL
128	0	&& !OSSL_PARAM_set_size_t(p.pad, ctx->tls_aad_pad_sz)) {
129	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
130	0	return 0;
131	0	}
132
133	0	if (p.tag != NULL) {
134	0	if (p.tag->data_type != OSSL_PARAM_OCTET_STRING) {
135	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
136	0	return 0;
137	0	}
138	0	if (!ctx->base.enc) {
139	0	ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_SET);
140	0	return 0;
141	0	}
142	0	if (p.tag->data_size == 0 \|\| p.tag->data_size > POLY1305_BLOCK_SIZE) {
143	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAG_LENGTH);
144	0	return 0;
145	0	}
146	0	memcpy(p.tag->data, ctx->tag, p.tag->data_size);
147	0	}
148	0	return 1;
149	0	}
150
151		static const OSSL_PARAM *chacha20_poly1305_gettable_ctx_params
152		(ossl_unused void cctx, ossl_unused void provctx)
153	1	{
154	1	return chacha20_poly1305_get_ctx_params_list;
155	1	}
156
157		static const OSSL_PARAM *chacha20_poly1305_settable_ctx_params(
158		ossl_unused void cctx, ossl_unused void provctx
159		)
160	0	{
161	0	return chacha20_poly1305_set_ctx_params_list;
162	0	}
163
164		static int chacha20_poly1305_set_ctx_params(void *vctx,
165		const OSSL_PARAM params[])
166	0	{
167	0	size_t len;
168	0	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
169	0	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
170	0	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->base.hw;
171	0	struct chacha20_poly1305_set_ctx_params_st p;
172
173	0	if (!chacha20_poly1305_set_ctx_params_decoder(params, &p))
174	0	return 0;
175
176	0	if (p.keylen != NULL) {
177	0	if (!OSSL_PARAM_get_size_t(p.keylen, &len)) {
178	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
179	0	return 0;
180	0	}
181	0	if (len != CHACHA20_POLY1305_KEYLEN) {
182	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
183	0	return 0;
184	0	}
185	0	}
186
187	0	if (p.ivlen != NULL) {
188	0	if (!OSSL_PARAM_get_size_t(p.ivlen, &len)) {
189	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
190	0	return 0;
191	0	}
192	0	if (len != CHACHA20_POLY1305_MAX_IVLEN) {
193	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
194	0	return 0;
195	0	}
196	0	}
197
198	0	if (p.tag != NULL) {
199	0	if (p.tag->data_type != OSSL_PARAM_OCTET_STRING) {
200	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
201	0	return 0;
202	0	}
203	0	if (p.tag->data_size == 0 \|\| p.tag->data_size > POLY1305_BLOCK_SIZE) {
204	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAG_LENGTH);
205	0	return 0;
206	0	}
207	0	if (p.tag->data != NULL) {
208	0	if (ctx->base.enc) {
209	0	ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_NEEDED);
210	0	return 0;
211	0	}
212	0	memcpy(ctx->tag, p.tag->data, p.tag->data_size);
213	0	}
214	0	ctx->tag_len = p.tag->data_size;
215	0	}
216
217	0	if (p.aad != NULL) {
218	0	if (p.aad->data_type != OSSL_PARAM_OCTET_STRING) {
219	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
220	0	return 0;
221	0	}
222	0	len = hw->tls_init(&ctx->base, p.aad->data, p.aad->data_size);
223	0	if (len == 0) {
224	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DATA);
225	0	return 0;
226	0	}
227	0	ctx->tls_aad_pad_sz = len;
228	0	}
229
230	0	if (p.fixed != NULL) {
231	0	if (p.fixed->data_type != OSSL_PARAM_OCTET_STRING) {
232	0	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
233	0	return 0;
234	0	}
235	0	if (hw->tls_iv_set_fixed(&ctx->base, p.fixed->data,
236	0	p.fixed->data_size) == 0) {
237	0	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
238	0	return 0;
239	0	}
240	0	}
241	0	return 1;
242	0	}
243
244		static int chacha20_poly1305_einit(void vctx, const unsigned char key,
245		size_t keylen, const unsigned char *iv,
246		size_t ivlen, const OSSL_PARAM params[])
247	0	{
248	0	int ret;
249
250		/* The generic function checks for ossl_prov_is_running() */
251	0	ret = ossl_cipher_generic_einit(vctx, key, keylen, iv, ivlen, NULL);
252	0	if (ret && iv != NULL) {
253	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
254	0	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
255	0	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
256
257	0	hw->initiv(ctx);
258	0	}
259	0	if (ret && !chacha20_poly1305_set_ctx_params(vctx, params))
260	0	ret = 0;
261	0	return ret;
262	0	}
263
264		static int chacha20_poly1305_dinit(void vctx, const unsigned char key,
265		size_t keylen, const unsigned char *iv,
266		size_t ivlen, const OSSL_PARAM params[])
267	0	{
268	0	int ret;
269
270		/* The generic function checks for ossl_prov_is_running() */
271	0	ret = ossl_cipher_generic_dinit(vctx, key, keylen, iv, ivlen, NULL);
272	0	if (ret && iv != NULL) {
273	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
274	0	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
275	0	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
276
277	0	hw->initiv(ctx);
278	0	}
279	0	if (ret && !chacha20_poly1305_set_ctx_params(vctx, params))
280	0	ret = 0;
281	0	return ret;
282	0	}
283
284		static int chacha20_poly1305_cipher(void vctx, unsigned char out,
285		size_t *outl, size_t outsize,
286		const unsigned char *in, size_t inl)
287	0	{
288	0	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
289	0	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
290	0	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
291
292	0	if (!ossl_prov_is_running())
293	0	return 0;
294
295	0	if (inl == 0) {
296	0	*outl = 0;
297	0	return 1;
298	0	}
299
300	0	if (outsize < inl) {
301	0	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
302	0	return 0;
303	0	}
304
305	0	if (!hw->aead_cipher(ctx, out, outl, in, inl))
306	0	return 0;
307
308	0	return 1;
309	0	}
310
311		static int chacha20_poly1305_final(void vctx, unsigned char out, size_t *outl,
312		size_t outsize)
313	0	{
314	0	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
315	0	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
316	0	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->base.hw;
317
318	0	if (!ossl_prov_is_running())
319	0	return 0;
320
321		/* The tag must be set before actually decrypting data */
322	0	if (!ctx->base.enc && ctx->tag_len == 0) {
323	0	ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_SET);
324	0	return 0;
325	0	}
326
327	0	if (hw->aead_cipher((PROV_CIPHER_CTX *)ctx, out, outl, NULL, 0) <= 0)
328	0	return 0;
329
330	0	*outl = 0;
331	0	return 1;
332	0	}
333
334		/* ossl_chacha20_ossl_poly1305_functions */
335		const OSSL_DISPATCH ossl_chacha20_ossl_poly1305_functions[] = {
336		{ OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_poly1305_newctx },
337		{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_poly1305_freectx },
338		{ OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))chacha20_poly1305_dupctx },
339		{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))chacha20_poly1305_einit },
340		{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))chacha20_poly1305_dinit },
341		{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_poly1305_update },
342		{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_poly1305_final },
343		{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_poly1305_cipher },
344		{ OSSL_FUNC_CIPHER_GET_PARAMS,
345		(void (*)(void))chacha20_poly1305_get_params },
346		{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS,
347		(void (*)(void))chacha20_poly1305_gettable_params },
348		{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS,
349		(void (*)(void))chacha20_poly1305_get_ctx_params },
350		{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
351		(void (*)(void))chacha20_poly1305_gettable_ctx_params },
352		{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS,
353		(void (*)(void))chacha20_poly1305_set_ctx_params },
354		{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
355		(void (*)(void))chacha20_poly1305_settable_ctx_params },
356		OSSL_DISPATCH_END
357		};