[thirdparty/openssl.git] / providers / implementations / ciphers / cipher_chacha20_poly1305.c

/*
 * Copyright 2019-2020 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 "cipher_chacha20_poly1305.h"
#include "prov/implementations.h"
#include "prov/providercommonerr.h"


#define CHACHA20_POLY1305_KEYLEN CHACHA_KEY_SIZE
#define CHACHA20_POLY1305_BLKLEN 1
#define CHACHA20_POLY1305_MAX_IVLEN 12
#define CHACHA20_POLY1305_MODE 0
/* TODO(3.0) Figure out what flags are required */
#define CHACHA20_POLY1305_FLAGS (EVP_CIPH_FLAG_AEAD_CIPHER                     \
                                | EVP_CIPH_ALWAYS_CALL_INIT                    \
                                | EVP_CIPH_CTRL_INIT                           \
                                | EVP_CIPH_CUSTOM_COPY                         \
                                | EVP_CIPH_FLAG_CUSTOM_CIPHER                  \
                                | EVP_CIPH_CUSTOM_IV                           \
                                | EVP_CIPH_CUSTOM_IV_LENGTH)

static OSSL_FUNC_cipher_newctx_fn chacha20_poly1305_newctx;
static OSSL_FUNC_cipher_freectx_fn chacha20_poly1305_freectx;
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;
#define chacha20_poly1305_settable_ctx_params cipher_aead_settable_ctx_params
#define chacha20_poly1305_gettable_params cipher_generic_gettable_params
#define chacha20_poly1305_update chacha20_poly1305_cipher

static void *chacha20_poly1305_newctx(void *provctx)
{
    PROV_CHACHA20_POLY1305_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));

    if (ctx != NULL) {
        cipher_generic_initkey(&ctx->base, CHACHA20_POLY1305_KEYLEN * 8,
                               CHACHA20_POLY1305_BLKLEN * 8,
                               CHACHA20_POLY1305_IVLEN * 8,
                               CHACHA20_POLY1305_MODE,
                               CHACHA20_POLY1305_FLAGS,
                               PROV_CIPHER_HW_chacha20_poly1305(
                                   CHACHA20_POLY1305_KEYLEN * 8),
                               NULL);
        ctx->nonce_len = CHACHA20_POLY1305_IVLEN;
        ctx->tls_payload_length = NO_TLS_PAYLOAD_LENGTH;
        chacha20_initctx(&ctx->chacha);
    }
    return ctx;
}

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

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

static int chacha20_poly1305_get_params(OSSL_PARAM params[])
{
    return 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;
    OSSL_PARAM *p;

    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
    if (p != NULL) {
        if (!OSSL_PARAM_set_size_t(p, ctx->nonce_len)) {
            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_POLY1305_KEYLEN)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAGLEN);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->tag_len)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }
    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD);
    if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->tls_aad_pad_sz)) {
        ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
        return 0;
    }

    p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAG);
    if (p != NULL) {
        if (p->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_NOTSET);
            return 0;
        }
        if (p->data_size == 0 || p->data_size > POLY1305_BLOCK_SIZE) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAGLEN);
            return 0;
        }
        memcpy(p->data, ctx->tag, p->data_size);
    }

    return 1;
}

static const OSSL_PARAM chacha20_poly1305_known_gettable_ctx_params[] = {
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
    OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
    OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, NULL),
    OSSL_PARAM_END
};
static const OSSL_PARAM *chacha20_poly1305_gettable_ctx_params(void *provctx)
{
    return chacha20_poly1305_known_gettable_ctx_params;
}

static int chacha20_poly1305_set_ctx_params(void *vctx,
                                            const OSSL_PARAM params[])
{
    const OSSL_PARAM *p;
    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;

    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_POLY1305_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 == 0 || len > CHACHA20_POLY1305_MAX_IVLEN) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
            return 0;
        }
        ctx->nonce_len = len;
    }

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

    p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TLS1_AAD);
    if (p != NULL) {
        if (p->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->data, p->data_size);
        if (len == 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DATA);
            return 0;
        }
        ctx->tls_aad_pad_sz = len;
    }

    p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED);
    if (p != NULL) {
        if (p->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->data, p->data_size) == 0) {
            ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IVLEN);
            return 0;
        }
    }
    /* ignore OSSL_CIPHER_PARAM_AEAD_MAC_KEY */
    return 1;
}

static int chacha20_poly1305_einit(void *vctx, const unsigned char *key,
                                  size_t keylen, const unsigned char *iv,
                                  size_t ivlen)
{
    int ret;

    ret = cipher_generic_einit(vctx, key, keylen, iv, ivlen);
    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);
    }
    return ret;
}

static int chacha20_poly1305_dinit(void *vctx, const unsigned char *key,
                                  size_t keylen, const unsigned char *iv,
                                  size_t ivlen)
{
    int ret;

    ret = cipher_generic_dinit(vctx, key, keylen, iv, ivlen);
    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);
    }
    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 (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_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
    PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
        (PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;

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

    *outl = 0;
    return 1;
}

/* chacha20_poly1305_functions */
const OSSL_DISPATCH chacha20_poly1305_functions[] = {
    { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_poly1305_newctx },
    { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_poly1305_freectx },
    { 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 },
    { 0, NULL }
};
Commit	Line	Data
3d5a7578	1	/*
fbd2ece1	2	* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
3d5a7578 SL	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 "cipher_chacha20_poly1305.h"
	13	#include "prov/implementations.h"
	14	#include "prov/providercommonerr.h"
	15
	16
	17	#define CHACHA20_POLY1305_KEYLEN CHACHA_KEY_SIZE
	18	#define CHACHA20_POLY1305_BLKLEN 1
	19	#define CHACHA20_POLY1305_MAX_IVLEN 12
	20	#define CHACHA20_POLY1305_MODE 0
	21	/* TODO(3.0) Figure out what flags are required */
	22	#define CHACHA20_POLY1305_FLAGS (EVP_CIPH_FLAG_AEAD_CIPHER \
	23	\| EVP_CIPH_ALWAYS_CALL_INIT \
	24	\| EVP_CIPH_CTRL_INIT \
	25	\| EVP_CIPH_CUSTOM_COPY \
	26	\| EVP_CIPH_FLAG_CUSTOM_CIPHER \
	27	\| EVP_CIPH_CUSTOM_IV \
	28	\| EVP_CIPH_CUSTOM_IV_LENGTH)
	29
363b1e5d DMSP	30	static OSSL_FUNC_cipher_newctx_fn chacha20_poly1305_newctx;
	31	static OSSL_FUNC_cipher_freectx_fn chacha20_poly1305_freectx;
	32	static OSSL_FUNC_cipher_encrypt_init_fn chacha20_poly1305_einit;
	33	static OSSL_FUNC_cipher_decrypt_init_fn chacha20_poly1305_dinit;
	34	static OSSL_FUNC_cipher_get_params_fn chacha20_poly1305_get_params;
	35	static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_poly1305_get_ctx_params;
	36	static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_poly1305_set_ctx_params;
	37	static OSSL_FUNC_cipher_cipher_fn chacha20_poly1305_cipher;
	38	static OSSL_FUNC_cipher_final_fn chacha20_poly1305_final;
	39	static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_poly1305_gettable_ctx_params;
3d5a7578 SL	40	#define chacha20_poly1305_settable_ctx_params cipher_aead_settable_ctx_params
	41	#define chacha20_poly1305_gettable_params cipher_generic_gettable_params
	42	#define chacha20_poly1305_update chacha20_poly1305_cipher
	43
	44	static void chacha20_poly1305_newctx(void provctx)
	45	{
	46	PROV_CHACHA20_POLY1305_CTX ctx = OPENSSL_zalloc(sizeof(ctx));
	47
	48	if (ctx != NULL) {
	49	cipher_generic_initkey(&ctx->base, CHACHA20_POLY1305_KEYLEN * 8,
	50	CHACHA20_POLY1305_BLKLEN * 8,
	51	CHACHA20_POLY1305_IVLEN * 8,
	52	CHACHA20_POLY1305_MODE,
	53	CHACHA20_POLY1305_FLAGS,
	54	PROV_CIPHER_HW_chacha20_poly1305(
	55	CHACHA20_POLY1305_KEYLEN * 8),
	56	NULL);
	57	ctx->nonce_len = CHACHA20_POLY1305_IVLEN;
	58	ctx->tls_payload_length = NO_TLS_PAYLOAD_LENGTH;
	59	chacha20_initctx(&ctx->chacha);
	60	}
	61	return ctx;
	62	}
	63
	64	static void chacha20_poly1305_freectx(void *vctx)
	65	{
	66	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
	67
63ee6ec1 MC	68	if (ctx != NULL) {
63ee6ec1 MC	69	cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
5e58733b	70	OPENSSL_clear_free(ctx, sizeof(*ctx));
63ee6ec1	71	}
3d5a7578 SL	72	}
	73
	74	static int chacha20_poly1305_get_params(OSSL_PARAM params[])
	75	{
	76	return cipher_generic_get_params(params, 0, CHACHA20_POLY1305_FLAGS,
	77	CHACHA20_POLY1305_KEYLEN * 8,
	78	CHACHA20_POLY1305_BLKLEN * 8,
	79	CHACHA20_POLY1305_IVLEN * 8);
	80	}
	81
	82	static int chacha20_poly1305_get_ctx_params(void *vctx, OSSL_PARAM params[])
	83	{
	84	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
	85	OSSL_PARAM *p;
	86
	87	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
	88	if (p != NULL) {
	89	if (!OSSL_PARAM_set_size_t(p, ctx->nonce_len)) {
	90	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	91	return 0;
	92	}
	93	}
	94	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
	95	if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_POLY1305_KEYLEN)) {
	96	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	97	return 0;
	98	}
	99	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAGLEN);
	100	if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->tag_len)) {
	101	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	102	return 0;
	103	}
	104	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD);
	105	if (p != NULL && !OSSL_PARAM_set_size_t(p, ctx->tls_aad_pad_sz)) {
	106	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	107	return 0;
	108	}
	109
	110	p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_AEAD_TAG);
	111	if (p != NULL) {
	112	if (p->data_type != OSSL_PARAM_OCTET_STRING) {
	113	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
	114	return 0;
	115	}
	116	if (!ctx->base.enc) {
	117	ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOTSET);
	118	return 0;
	119	}
	120	if (p->data_size == 0 \|\| p->data_size > POLY1305_BLOCK_SIZE) {
	121	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAGLEN);
	122	return 0;
	123	}
	124	memcpy(p->data, ctx->tag, p->data_size);
	125	}
	126
	127	return 1;
	128	}
	129
	130	static const OSSL_PARAM chacha20_poly1305_known_gettable_ctx_params[] = {
	131	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
	132	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
	133	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TAGLEN, NULL),
	134	OSSL_PARAM_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, NULL, 0),
	135	OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_AEAD_TLS1_AAD_PAD, NULL),
136	OSSL_PARAM_END
137	};
af5e1e85	138	static const OSSL_PARAM chacha20_poly1305_gettable_ctx_params(void provctx)
3d5a7578 SL	139	{
	140	return chacha20_poly1305_known_gettable_ctx_params;
	141	}
	142
	143	static int chacha20_poly1305_set_ctx_params(void *vctx,
	144	const OSSL_PARAM params[])
	145	{
	146	const OSSL_PARAM *p;
	147	size_t len;
	148	PROV_CHACHA20_POLY1305_CTX ctx = (PROV_CHACHA20_POLY1305_CTX )vctx;
	149	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
	150	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->base.hw;
	151
	152	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
	153	if (p != NULL) {
	154	if (!OSSL_PARAM_get_size_t(p, &len)) {
	155	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
	156	return 0;
	157	}
	158	if (len != CHACHA20_POLY1305_KEYLEN) {
	159	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
	160	return 0;
	161	}
	162	}
	163	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
	164	if (p != NULL) {
	165	if (!OSSL_PARAM_get_size_t(p, &len)) {
	166	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
	167	return 0;
	168	}
	169	if (len == 0 \|\| len > CHACHA20_POLY1305_MAX_IVLEN) {
	170	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
	171	return 0;
	172	}
	173	ctx->nonce_len = len;
	174	}
	175
	176	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TAG);
	177	if (p != NULL) {
	178	if (p->data_type != OSSL_PARAM_OCTET_STRING) {
	179	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
	180	return 0;
	181	}
	182	if (p->data_size == 0 \|\| p->data_size > POLY1305_BLOCK_SIZE) {
	183	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_TAGLEN);
	184	return 0;
	185	}
	186	if (p->data != NULL) {
	187	if (ctx->base.enc) {
	188	ERR_raise(ERR_LIB_PROV, PROV_R_TAG_NOT_NEEDED);
	189	return 0;
	190	}
	191	memcpy(ctx->tag, p->data, p->data_size);
	192	}
	193	ctx->tag_len = p->data_size;
	194	}
	195
	196	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TLS1_AAD);
	197	if (p != NULL) {
	198	if (p->data_type != OSSL_PARAM_OCTET_STRING) {
	199	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
	200	return 0;
	201	}
	202	len = hw->tls_init(&ctx->base, p->data, p->data_size);
203	if (len == 0) {
204	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_DATA);
205	return 0;
206	}
207	ctx->tls_aad_pad_sz = len;
208	}
209
210	p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_AEAD_TLS1_IV_FIXED);
211	if (p != NULL) {
212	if (p->data_type != OSSL_PARAM_OCTET_STRING) {
213	ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
214	return 0;
215	}
216	if (hw->tls_iv_set_fixed(&ctx->base, p->data, p->data_size) == 0) {
217	ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IVLEN);
218	return 0;
219	}
220	}
221	/* ignore OSSL_CIPHER_PARAM_AEAD_MAC_KEY */
222	return 1;
223	}
224
225	static int chacha20_poly1305_einit(void vctx, const unsigned char key,
226	size_t keylen, const unsigned char *iv,
227	size_t ivlen)
228	{
229	int ret;
230
231	ret = cipher_generic_einit(vctx, key, keylen, iv, ivlen);
232	if (ret && iv != NULL) {
233	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
234	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
235	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
236
237	hw->initiv(ctx);
238	}
239	return ret;
240	}
241
242	static int chacha20_poly1305_dinit(void vctx, const unsigned char key,
243	size_t keylen, const unsigned char *iv,
244	size_t ivlen)
245	{
246	int ret;
247
248	ret = cipher_generic_dinit(vctx, key, keylen, iv, ivlen);
249	if (ret && iv != NULL) {
250	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
251	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
252	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
253
254	hw->initiv(ctx);
255	}
256	return ret;
257	}
258
259	static int chacha20_poly1305_cipher(void vctx, unsigned char out,
260	size_t *outl, size_t outsize,
261	const unsigned char *in, size_t inl)
262	{
263	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
264	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
265	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
266
4b9c750b MC	267	if (inl == 0) {
	268	*outl = 0;
	269	return 1;
	270	}
	271
3d5a7578 SL	272	if (outsize < inl) {
	273	ERR_raise(ERR_LIB_PROV, PROV_R_OUTPUT_BUFFER_TOO_SMALL);
	274	return 0;
	275	}
	276
	277	if (!hw->aead_cipher(ctx, out, outl, in, inl))
	278	return 0;
	279
3d5a7578 SL	280	return 1;
	281	}
	282
	283	static int chacha20_poly1305_final(void vctx, unsigned char out, size_t *outl,
	284	size_t outsize)
	285	{
	286	PROV_CIPHER_CTX ctx = (PROV_CIPHER_CTX )vctx;
	287	PROV_CIPHER_HW_CHACHA20_POLY1305 *hw =
	288	(PROV_CIPHER_HW_CHACHA20_POLY1305 *)ctx->hw;
	289
	290	if (hw->aead_cipher(ctx, out, outl, NULL, 0) <= 0)
	291	return 0;
	292
	293	*outl = 0;
	294	return 1;
	295	}
	296
	297	/* chacha20_poly1305_functions */
	298	const OSSL_DISPATCH chacha20_poly1305_functions[] = {
	299	{ OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_poly1305_newctx },
	300	{ OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_poly1305_freectx },
	301	{ OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))chacha20_poly1305_einit },
	302	{ OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))chacha20_poly1305_dinit },
	303	{ OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_poly1305_update },
	304	{ OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_poly1305_final },
	305	{ OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_poly1305_cipher },
	306	{ OSSL_FUNC_CIPHER_GET_PARAMS,
	307	(void (*)(void))chacha20_poly1305_get_params },
	308	{ OSSL_FUNC_CIPHER_GETTABLE_PARAMS,
	309	(void (*)(void))chacha20_poly1305_gettable_params },
	310	{ OSSL_FUNC_CIPHER_GET_CTX_PARAMS,
	311	(void (*)(void))chacha20_poly1305_get_ctx_params },
	312	{ OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
	313	(void (*)(void))chacha20_poly1305_gettable_ctx_params },
	314	{ OSSL_FUNC_CIPHER_SET_CTX_PARAMS,
	315	(void (*)(void))chacha20_poly1305_set_ctx_params },
	316	{ OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
	317	(void (*)(void))chacha20_poly1305_settable_ctx_params },
	318	{ 0, NULL }
	319	};
	320