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mbed TLS library

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camellia.h File Reference
Data Structures | Functions

camellia.h File Reference

Camellia block cipher. More...

Go to the source code of this file.

Data Structures

struct  camellia_context
 CAMELLIA context structure. More...

Functions

void camellia_init (camellia_context *ctx)
 Initialize CAMELLIA context.
void camellia_free (camellia_context *ctx)
 Clear CAMELLIA context.
int camellia_setkey_enc (camellia_context *ctx, const unsigned char *key, unsigned int keysize)
 CAMELLIA key schedule (encryption)
int camellia_setkey_dec (camellia_context *ctx, const unsigned char *key, unsigned int keysize)
 CAMELLIA key schedule (decryption)
int camellia_crypt_ecb (camellia_context *ctx, int mode, const unsigned char input[16], unsigned char output[16])
 CAMELLIA-ECB block encryption/decryption.
int camellia_crypt_cbc (camellia_context *ctx, int mode, size_t length, unsigned char iv[16], const unsigned char *input, unsigned char *output)
 CAMELLIA-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes)
int camellia_crypt_cfb128 (camellia_context *ctx, int mode, size_t length, size_t *iv_off, unsigned char iv[16], const unsigned char *input, unsigned char *output)
 CAMELLIA-CFB128 buffer encryption/decryption.
int camellia_crypt_ctr (camellia_context *ctx, size_t length, size_t *nc_off, unsigned char nonce_counter[16], unsigned char stream_block[16], const unsigned char *input, unsigned char *output)
 CAMELLIA-CTR buffer encryption/decryption.
int camellia_self_test (int verbose)
 Checkup routine.

Detailed Description

Camellia block cipher.

Copyright (C) 2006-2014, ARM Limited, All Rights Reserved

This file is part of mbed TLS (https://tls.mbed.org)

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.

Definition in file camellia.h.

Function Documentation

int camellia_crypt_cbc ( camellia_context *  ctx,
int  mode,
size_t  length,
unsigned char  iv[16],
const unsigned char *  input,
unsigned char *  output 
)

CAMELLIA-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes)

Note:
Upon exit, the content of the IV is updated so that you can call the function same function again on the following block(s) of data and get the same result as if it was encrypted in one call. This allows a "streaming" usage. If on the other hand you need to retain the contents of the IV, you should either save it manually or use the cipher module instead.
Parameters:
ctxCAMELLIA context
modeCAMELLIA_ENCRYPT or CAMELLIA_DECRYPT
lengthlength of the input data
ivinitialization vector (updated after use)
inputbuffer holding the input data
outputbuffer holding the output data
Returns:
0 if successful, or POLARSSL_ERR_CAMELLIA_INVALID_INPUT_LENGTH

Definition at line 558 of file camellia.c.

int camellia_crypt_cfb128 ( camellia_context *  ctx,
int  mode,
size_t  length,
size_t *  iv_off,
unsigned char  iv[16],
const unsigned char *  input,
unsigned char *  output 
)

CAMELLIA-CFB128 buffer encryption/decryption.

Note: Due to the nature of CFB you should use the same key schedule for both encryption and decryption. So a context initialized with camellia_setkey_enc() for both CAMELLIA_ENCRYPT and CAMELLIE_DECRYPT.

Note:
Upon exit, the content of the IV is updated so that you can call the function same function again on the following block(s) of data and get the same result as if it was encrypted in one call. This allows a "streaming" usage. If on the other hand you need to retain the contents of the IV, you should either save it manually or use the cipher module instead.
Parameters:
ctxCAMELLIA context
modeCAMELLIA_ENCRYPT or CAMELLIA_DECRYPT
lengthlength of the input data
iv_offoffset in IV (updated after use)
ivinitialization vector (updated after use)
inputbuffer holding the input data
outputbuffer holding the output data
Returns:
0 if successful, or POLARSSL_ERR_CAMELLIA_INVALID_INPUT_LENGTH

Definition at line 612 of file camellia.c.

int camellia_crypt_ctr ( camellia_context *  ctx,
size_t  length,
size_t *  nc_off,
unsigned char  nonce_counter[16],
unsigned char  stream_block[16],
const unsigned char *  input,
unsigned char *  output 
)

CAMELLIA-CTR buffer encryption/decryption.

Warning: You have to keep the maximum use of your counter in mind!

Note: Due to the nature of CTR you should use the same key schedule for both encryption and decryption. So a context initialized with camellia_setkey_enc() for both CAMELLIA_ENCRYPT and CAMELLIA_DECRYPT.

Parameters:
ctxCAMELLIA context
lengthThe length of the data
nc_offThe offset in the current stream_block (for resuming within current cipher stream). The offset pointer to should be 0 at the start of a stream.
nonce_counterThe 128-bit nonce and counter.
stream_blockThe saved stream-block for resuming. Is overwritten by the function.
inputThe input data stream
outputThe output data stream
Returns:
0 if successful

Definition at line 660 of file camellia.c.

int camellia_crypt_ecb ( camellia_context *  ctx,
int  mode,
const unsigned char  input[16],
unsigned char  output[16] 
)

CAMELLIA-ECB block encryption/decryption.

Parameters:
ctxCAMELLIA context
modeCAMELLIA_ENCRYPT or CAMELLIA_DECRYPT
input16-byte input block
output16-byte output block
Returns:
0 if successful

Definition at line 495 of file camellia.c.

void camellia_free ( camellia_context *  ctx )

Clear CAMELLIA context.

Parameters:
ctxCAMELLIA context to be cleared

Definition at line 331 of file camellia.c.

void camellia_init ( camellia_context *  ctx )

Initialize CAMELLIA context.

Parameters:
ctxCAMELLIA context to be initialized

Definition at line 326 of file camellia.c.

int camellia_self_test ( int  verbose )

Checkup routine.

Returns:
0 if successful, or 1 if the test failed

Definition at line 894 of file camellia.c.

int camellia_setkey_dec ( camellia_context *  ctx,
const unsigned char *  key,
unsigned int  keysize 
)

CAMELLIA key schedule (decryption)

Parameters:
ctxCAMELLIA context to be initialized
keydecryption key
keysizemust be 128, 192 or 256
Returns:
0 if successful, or POLARSSL_ERR_CAMELLIA_INVALID_KEY_LENGTH

Definition at line 447 of file camellia.c.

int camellia_setkey_enc ( camellia_context *  ctx,
const unsigned char *  key,
unsigned int  keysize 
)

CAMELLIA key schedule (encryption)

Parameters:
ctxCAMELLIA context to be initialized
keyencryption key
keysizemust be 128, 192 or 256
Returns:
0 if successful, or POLARSSL_ERR_CAMELLIA_INVALID_KEY_LENGTH

Definition at line 342 of file camellia.c.

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