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idea.c File Reference
Functions

idea.c File Reference

IDEA encryption algorithm. More...

Go to the source code of this file.

Functions

static uint16_t ideaMul (uint16_t a, uint16_t b)
 Modular multiplication.
static uint16_t ideaInv (uint16_t a)
 Compute modular inverse.
error_t ideaInit (IdeaContext *context, const uint8_t *key, size_t keyLength)
 Initialize a IDEA context using the supplied key.
void ideaEncryptBlock (IdeaContext *context, const uint8_t *input, uint8_t *output)
 Encrypt a 16-byte block using IDEA algorithm.
void ideaDecryptBlock (IdeaContext *context, const uint8_t *input, uint8_t *output)
 Decrypt a 16-byte block using IDEA algorithm.

Detailed Description

IDEA encryption algorithm.

License

Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.

This file is part of CycloneCrypto Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

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.

Author:
Oryx Embedded SARL (www.oryx-embedded.com)
Version:
1.7.6

Definition in file idea.c.

Function Documentation

void ideaDecryptBlock ( IdeaContext *  context,
const uint8_t *  input,
uint8_t *  output 
)

Decrypt a 16-byte block using IDEA algorithm.

Parameters:
[in]contextPointer to the IDEA context
[in]inputCiphertext block to decrypt
[out]outputPlaintext block resulting from decryption

Definition at line 259 of file idea.c.

void ideaEncryptBlock ( IdeaContext *  context,
const uint8_t *  input,
uint8_t *  output 
)

Encrypt a 16-byte block using IDEA algorithm.

Parameters:
[in]contextPointer to the IDEA context
[in]inputPlaintext block to encrypt
[out]outputCiphertext block resulting from encryption

Definition at line 192 of file idea.c.

error_t ideaInit ( IdeaContext *  context,
const uint8_t *  key,
size_t  keyLength 
)

Initialize a IDEA context using the supplied key.

Parameters:
[in]contextPointer to the IDEA context to initialize
[in]keyPointer to the key
[in]keyLengthLength of the key
Returns:
Error code

Definition at line 126 of file idea.c.

static uint16_t ideaInv ( uint16_t  a ) [static]

Compute modular inverse.

Parameters:
[in]aOperand
Returns:
Resulting value

Definition at line 85 of file idea.c.

static uint16_t ideaMul ( uint16_t  a,
uint16_t  b 
) [static]

Modular multiplication.

Parameters:
[in]aFirst operand
[in]bSecond operand
Returns:
Resulting value

Definition at line 63 of file idea.c.

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