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/*
* Copyright 2019-2022 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
*/
#ifndef OSSL_PROV_CIPHERCOMMON_CCM_H
#define OSSL_PROV_CIPHERCOMMON_CCM_H
#pragma once
#include "ciphercommon_aead.h"
typedef struct prov_ccm_hw_st PROV_CCM_HW;
#if defined(OPENSSL_CPUID_OBJ) && defined(__s390__)
/*-
* KMAC-AES parameter block - begin
* (see z/Architecture Principles of Operation >= SA22-7832-08)
*/
typedef struct S390X_kmac_params_st {
union {
unsigned long long g[2];
unsigned char b[16];
} icv;
unsigned char k[32];
} S390X_KMAC_PARAMS;
/* KMAC-AES parameter block - end */
#endif
/* Base structure that is shared by AES & ARIA for CCM MODE */
typedef struct prov_ccm_st {
unsigned int enc : 1;
unsigned int key_set : 1; /* Set if key initialised */
unsigned int iv_set : 1; /* Set if an iv is set */
unsigned int tag_set : 1; /* Set if tag is valid */
unsigned int len_set : 1; /* Set if message length set */
size_t l, m; /* L and M parameters from RFC3610 */
size_t keylen;
size_t tls_aad_len; /* TLS AAD length */
size_t tls_aad_pad_sz;
unsigned char iv[GENERIC_BLOCK_SIZE];
unsigned char buf[GENERIC_BLOCK_SIZE];
CCM128_CONTEXT ccm_ctx;
ccm128_f str;
const PROV_CCM_HW *hw; /* hardware specific methods */
} PROV_CCM_CTX;
PROV_CIPHER_FUNC(int, CCM_cipher, (PROV_CCM_CTX * ctx, unsigned char *out, size_t *padlen, const unsigned char *in, size_t len));
PROV_CIPHER_FUNC(int, CCM_setkey, (PROV_CCM_CTX * ctx, const unsigned char *key, size_t keylen));
PROV_CIPHER_FUNC(int, CCM_setiv, (PROV_CCM_CTX * dat, const unsigned char *iv, size_t ivlen, size_t mlen));
PROV_CIPHER_FUNC(int, CCM_setaad, (PROV_CCM_CTX * ctx, const unsigned char *aad, size_t aadlen));
PROV_CIPHER_FUNC(int, CCM_auth_encrypt, (PROV_CCM_CTX * ctx, const unsigned char *in, unsigned char *out, size_t len, unsigned char *tag, size_t taglen));
PROV_CIPHER_FUNC(int, CCM_auth_decrypt, (PROV_CCM_CTX * ctx, const unsigned char *in, unsigned char *out, size_t len, unsigned char *tag, size_t taglen));
PROV_CIPHER_FUNC(int, CCM_gettag, (PROV_CCM_CTX * ctx, unsigned char *tag, size_t taglen));
/*
* CCM Mode internal method table used to handle hardware specific differences,
* (and different algorithms).
*/
struct prov_ccm_hw_st {
OSSL_CCM_setkey_fn setkey;
OSSL_CCM_setiv_fn setiv;
OSSL_CCM_setaad_fn setaad;
OSSL_CCM_auth_encrypt_fn auth_encrypt;
OSSL_CCM_auth_decrypt_fn auth_decrypt;
OSSL_CCM_gettag_fn gettag;
};
OSSL_FUNC_cipher_encrypt_init_fn ossl_ccm_einit;
OSSL_FUNC_cipher_decrypt_init_fn ossl_ccm_dinit;
OSSL_FUNC_cipher_get_ctx_params_fn ossl_ccm_get_ctx_params;
OSSL_FUNC_cipher_set_ctx_params_fn ossl_ccm_set_ctx_params;
OSSL_FUNC_cipher_update_fn ossl_ccm_stream_update;
OSSL_FUNC_cipher_final_fn ossl_ccm_stream_final;
OSSL_FUNC_cipher_cipher_fn ossl_ccm_cipher;
void ossl_ccm_initctx(PROV_CCM_CTX *ctx, size_t keybits, const PROV_CCM_HW *hw);
int ossl_ccm_generic_setiv(PROV_CCM_CTX *ctx, const unsigned char *nonce,
size_t nlen, size_t mlen);
int ossl_ccm_generic_setaad(PROV_CCM_CTX *ctx, const unsigned char *aad,
size_t alen);
int ossl_ccm_generic_gettag(PROV_CCM_CTX *ctx, unsigned char *tag, size_t tlen);
int ossl_ccm_generic_auth_encrypt(PROV_CCM_CTX *ctx, const unsigned char *in,
unsigned char *out, size_t len,
unsigned char *tag, size_t taglen);
int ossl_ccm_generic_auth_decrypt(PROV_CCM_CTX *ctx, const unsigned char *in,
unsigned char *out, size_t len,
unsigned char *expected_tag, size_t taglen);
#endif
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