crypto_mbedtls.h

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/*
 *  OpenVPN -- An application to securely tunnel IP networks
 *             over a single TCP/UDP port, with support for SSL/TLS-based
 *             session authentication and key exchange,
 *             packet encryption, packet authentication, and
 *             packet compression.
 *
 *  Copyright (C) 2002-2024 OpenVPN Inc <sales@openvpn.net>
 *  Copyright (C) 2010-2021 Fox Crypto B.V. <openvpn@foxcrypto.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef CRYPTO_MBEDTLS_H_
#define CRYPTO_MBEDTLS_H_
 
#include <stdbool.h>
#include <mbedtls/cipher.h>
#include <mbedtls/md.h>
#include <mbedtls/ctr_drbg.h>
 
typedef mbedtls_md_info_t md_kt_t;
 
typedef mbedtls_cipher_context_t cipher_ctx_t;
 
typedef mbedtls_md_context_t md_ctx_t;
 
typedef mbedtls_md_context_t hmac_ctx_t;
 
/* Use a dummy type for the provider */
typedef void provider_t;
 
#define OPENVPN_MAX_IV_LENGTH   MBEDTLS_MAX_IV_LENGTH
 
#define OPENVPN_MODE_CBC        MBEDTLS_MODE_CBC
 
#define OPENVPN_MODE_OFB        MBEDTLS_MODE_OFB
 
#define OPENVPN_MODE_CFB        MBEDTLS_MODE_CFB
 
#define OPENVPN_MODE_GCM        MBEDTLS_MODE_GCM
 
typedef mbedtls_operation_t crypto_operation_t;
 
#define OPENVPN_OP_ENCRYPT      MBEDTLS_ENCRYPT
 
#define OPENVPN_OP_DECRYPT      MBEDTLS_DECRYPT
 
#define MD4_DIGEST_LENGTH       16
#define MD5_DIGEST_LENGTH       16
#define SHA_DIGEST_LENGTH       20
#define SHA256_DIGEST_LENGTH    32
 
mbedtls_ctr_drbg_context *rand_ctx_get(void);
 
#ifdef ENABLE_PREDICTION_RESISTANCE
void rand_ctx_enable_prediction_resistance(void);
 
#endif
 
bool mbed_log_err(unsigned int flags, int errval, const char *prefix);
 
bool mbed_log_func_line(unsigned int flags, int errval, const char *func,
                        int line);
 
static inline bool
mbed_log_func_line_lite(unsigned int flags, int errval,
                        const char *func, int line)
{
    if (errval)
    {
        return mbed_log_func_line(flags, errval, func, line);
    }
    return true;
}
 
#define mbed_ok(errval) \
    mbed_log_func_line_lite(D_CRYPT_ERRORS, errval, __func__, __LINE__)
 
#endif /* CRYPTO_MBEDTLS_H_ */