Hannes Tschofenig
Example program to test AES-GCM functionality. Used for a workshop
aes.h File Reference
AES block cipher. More...
Go to the source code of this file.
Data Structures | |
| struct | aes_context |
| AES context structure. More... | |
Functions | |
| int | aes_setkey_enc (aes_context *ctx, const unsigned char *key, unsigned int keysize) |
| AES key schedule (encryption) | |
| int | aes_setkey_dec (aes_context *ctx, const unsigned char *key, unsigned int keysize) |
| AES key schedule (decryption) | |
| int | aes_crypt_ecb (aes_context *ctx, int mode, const unsigned char input[16], unsigned char output[16]) |
| AES-ECB block encryption/decryption. | |
| int | aes_crypt_cbc (aes_context *ctx, int mode, size_t length, unsigned char iv[16], const unsigned char *input, unsigned char *output) |
| AES-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes) | |
| int | aes_crypt_cfb128 (aes_context *ctx, int mode, size_t length, size_t *iv_off, unsigned char iv[16], const unsigned char *input, unsigned char *output) |
| AES-CFB128 buffer encryption/decryption. | |
| int | aes_crypt_cfb8 (aes_context *ctx, int mode, size_t length, unsigned char iv[16], const unsigned char *input, unsigned char *output) |
| AES-CFB8 buffer encryption/decryption. | |
| int | aes_crypt_ctr (aes_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) |
| AES-CTR buffer encryption/decryption. | |
| int | aes_self_test (int verbose) |
| Checkup routine. | |
Detailed Description
AES block cipher.
Copyright (C) 2006-2014, Brainspark B.V.
This file is part of PolarSSL (http://www.polarssl.org) Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
All rights reserved.
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 aes.h.
Function Documentation
| int aes_crypt_cbc | ( | aes_context * | ctx, |
| int | mode, | ||
| size_t | length, | ||
| unsigned char | iv[16], | ||
| const unsigned char * | input, | ||
| unsigned char * | output | ||
| ) |
AES-CBC buffer encryption/decryption Length should be a multiple of the block size (16 bytes)
- Parameters:
-
ctx AES context mode AES_ENCRYPT or AES_DECRYPT length length of the input data iv initialization vector (updated after use) input buffer holding the input data output buffer holding the output data
- Returns:
- 0 if successful, or POLARSSL_ERR_AES_INVALID_INPUT_LENGTH
| int aes_crypt_cfb128 | ( | aes_context * | ctx, |
| int | mode, | ||
| size_t | length, | ||
| size_t * | iv_off, | ||
| unsigned char | iv[16], | ||
| const unsigned char * | input, | ||
| unsigned char * | output | ||
| ) |
AES-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 aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
- Parameters:
-
ctx AES context mode AES_ENCRYPT or AES_DECRYPT length length of the input data iv_off offset in IV (updated after use) iv initialization vector (updated after use) input buffer holding the input data output buffer holding the output data
- Returns:
- 0 if successful
| int aes_crypt_cfb8 | ( | aes_context * | ctx, |
| int | mode, | ||
| size_t | length, | ||
| unsigned char | iv[16], | ||
| const unsigned char * | input, | ||
| unsigned char * | output | ||
| ) |
AES-CFB8 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 aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
- Parameters:
-
ctx AES context mode AES_ENCRYPT or AES_DECRYPT length length of the input data iv initialization vector (updated after use) input buffer holding the input data output buffer holding the output data
- Returns:
- 0 if successful
| int aes_crypt_ctr | ( | aes_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 | ||
| ) |
AES-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 aes_setkey_enc() for both AES_ENCRYPT and AES_DECRYPT.
- Parameters:
-
ctx AES context length The length of the data nc_off The 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_counter The 128-bit nonce and counter. stream_block The saved stream-block for resuming. Is overwritten by the function. input The input data stream output The output data stream
- Returns:
- 0 if successful
| int aes_crypt_ecb | ( | aes_context * | ctx, |
| int | mode, | ||
| const unsigned char | input[16], | ||
| unsigned char | output[16] | ||
| ) |
| int aes_self_test | ( | int | verbose ) |
| int aes_setkey_dec | ( | aes_context * | ctx, |
| const unsigned char * | key, | ||
| unsigned int | keysize | ||
| ) |
| int aes_setkey_enc | ( | aes_context * | ctx, |
| const unsigned char * | key, | ||
| unsigned int | keysize | ||
| ) |
Generated on Tue Jul 12 2022 19:40:21 by
1.7.2