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_poly1305 cipher */ 11 12 #include "include/crypto/poly1305.h" 13 #include "cipher_chacha20.h" 14 15 #define NO_TLS_PAYLOAD_LENGTH ((size_t)-1) 16 #define CHACHA20_POLY1305_IVLEN 12 17 18 typedef struct { 19 PROV_CIPHER_CTX base; /* must be first */ 20 PROV_CHACHA20_CTX chacha; 21 POLY1305 poly1305; 22 unsigned int nonce[12 / 4]; 23 unsigned char tag[POLY1305_BLOCK_SIZE]; 24 unsigned char tls_aad[POLY1305_BLOCK_SIZE]; 25 struct { uint64_t aad, text; } len; 26 unsigned int aad : 1; 27 unsigned int mac_inited : 1; 28 size_t tag_len; 29 size_t tls_payload_length; 30 size_t tls_aad_pad_sz; 31 } PROV_CHACHA20_POLY1305_CTX; 32 33 typedef struct prov_cipher_hw_chacha_aead_st { 34 PROV_CIPHER_HW base; /* must be first */ 35 int (*aead_cipher)(PROV_CIPHER_CTX *dat, unsigned char *out, size_t *outl, 36 const unsigned char *in, size_t len); 37 int (*initiv)(PROV_CIPHER_CTX *ctx); 38 int (*tls_init)(PROV_CIPHER_CTX *ctx, unsigned char *aad, size_t alen); 39 int (*tls_iv_set_fixed)(PROV_CIPHER_CTX *ctx, unsigned char *fixed, 40 size_t flen); 41 } PROV_CIPHER_HW_CHACHA20_POLY1305; 42 43 const PROV_CIPHER_HW *ossl_prov_cipher_hw_chacha20_poly1305(size_t keybits); 44