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/*
* 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 "include/crypto/poly1305.h"
#include "cipher_chacha20.h"
#define NO_TLS_PAYLOAD_LENGTH ((size_t)-1)
#define CHACHA20_POLY1305_IVLEN 12
typedef struct {
PROV_CIPHER_CTX base; /* must be first */
PROV_CHACHA20_CTX chacha;
POLY1305 poly1305;
unsigned int nonce[12 / 4];
unsigned char tag[POLY1305_BLOCK_SIZE];
unsigned char tls_aad[POLY1305_BLOCK_SIZE];
struct { uint64_t aad, text; } len;
unsigned int aad : 1;
unsigned int mac_inited : 1;
size_t tag_len, nonce_len;
size_t tls_payload_length;
size_t tls_aad_pad_sz;
} PROV_CHACHA20_POLY1305_CTX;
typedef struct prov_cipher_hw_chacha_aead_st {
PROV_CIPHER_HW base; /* must be first */
int (*aead_cipher)(PROV_CIPHER_CTX *dat, unsigned char *out, size_t *outl,
const unsigned char *in, size_t len);
int (*initiv)(PROV_CIPHER_CTX *ctx);
int (*tls_init)(PROV_CIPHER_CTX *ctx, unsigned char *aad, size_t alen);
int (*tls_iv_set_fixed)(PROV_CIPHER_CTX *ctx, unsigned char *fixed,
size_t flen);
} PROV_CIPHER_HW_CHACHA20_POLY1305;
const PROV_CIPHER_HW *ossl_prov_cipher_hw_chacha20_poly1305(size_t keybits);
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