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cipher_mode_cfb.c File Reference
Cipher Feedback (CFB) mode. More...
Go to the source code of this file.
Functions | |
| error_t | cfbEncrypt (const CipherAlgo *cipher, void *context, uint_t s, uint8_t *iv, const uint8_t *p, uint8_t *c, size_t length) |
| CFB encryption. | |
| error_t | cfbDecrypt (const CipherAlgo *cipher, void *context, uint_t s, uint8_t *iv, const uint8_t *c, uint8_t *p, size_t length) |
| CFB decryption. | |
Detailed Description
Cipher Feedback (CFB) mode.
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.
Description
The Cipher Feedback (CFB) mode is a confidentiality mode that features the feedback of successive ciphertext segments into the input blocks of the forward cipher to generate output blocks that are exclusive-ORed with the plaintext to produce the ciphertext, and vice versa. The CFB mode requires an IV as the initial input block. The IV need not be secret, but it must be unpredictable. Refer to SP 800-38A for more details
- Version:
- 1.7.6
Definition in file cipher_mode_cfb.c.
Function Documentation
| error_t cfbDecrypt | ( | const CipherAlgo * | cipher, |
| void * | context, | ||
| uint_t | s, | ||
| uint8_t * | iv, | ||
| const uint8_t * | c, | ||
| uint8_t * | p, | ||
| size_t | length | ||
| ) |
CFB decryption.
- Parameters:
-
[in] cipher Cipher algorithm [in] context Cipher algorithm context [in] s Size of the plaintext and ciphertext segments [in,out] iv Initialization vector [in] c Ciphertext to be decrypted [out] p Plaintext resulting from the decryption [in] length Total number of data bytes to be decrypted
- Returns:
- Error code
Definition at line 121 of file cipher_mode_cfb.c.
| error_t cfbEncrypt | ( | const CipherAlgo * | cipher, |
| void * | context, | ||
| uint_t | s, | ||
| uint8_t * | iv, | ||
| const uint8_t * | p, | ||
| uint8_t * | c, | ||
| size_t | length | ||
| ) |
CFB encryption.
- Parameters:
-
[in] cipher Cipher algorithm [in] context Cipher algorithm context [in] s Size of the plaintext and ciphertext segments [in,out] iv Initialization vector [in] p Plaintext to be encrypted [out] c Ciphertext resulting from the encryption [in] length Total number of data bytes to be encrypted
- Returns:
- Error code
Definition at line 63 of file cipher_mode_cfb.c.
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