From e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:34:10 +0200 Subject: Adding upstream version 4.2.2. Signed-off-by: Daniel Baumann --- wsutil/eax.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 wsutil/eax.h (limited to 'wsutil/eax.h') diff --git a/wsutil/eax.h b/wsutil/eax.h new file mode 100644 index 00000000..ccf4dc62 --- /dev/null +++ b/wsutil/eax.h @@ -0,0 +1,46 @@ +/** @file + * Encryption and decryption routines implementing the EAX' encryption mode + * Copyright 2010, Edward J. Beroset, edward.j.beroset@us.elster.com + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef _EAX_H +#define _EAX_H + +#include + +typedef struct tagMAC_T +{ + uint8_t Mac[4]; +} MAC_T; + +#define EAX_MODE_CLEARTEXT_AUTH 1 +#define EAX_MODE_CIPHERTEXT_AUTH 2 + +#define EAX_SIZEOF_KEY 16 + +/*! + Decrypts cleartext data using EAX' mode (see ANSI Standard C12.22-2008). + + @param[in] pN pointer to cleartext (canonified form) + @param[in] pK pointer to secret key + @param[in,out] pC pointer to ciphertext + @param[in] SizeN byte length of cleartext (pN) buffer + @param[in] SizeK byte length of secret key (pK) + @param[in] SizeC byte length of ciphertext (pC) buffer + @param[in] pMac four-byte Message Authentication Code + @param[in] Mode EAX_MODE_CLEARTEXT_AUTH or EAX_MODE_CIPHERTEXT_AUTH + @return true if message has been authenticated; false if not + authenticated, invalid Mode or error + */ +WS_DLL_PUBLIC +bool Eax_Decrypt(uint8_t *pN, uint8_t *pK, uint8_t *pC, + uint32_t SizeN, uint32_t SizeK, uint32_t SizeC, MAC_T *pMac, + uint8_t Mode); + +#endif -- cgit v1.2.3