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des.h File Reference
DES block cipher.
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struct mbedtls_des_context DES context structure. More... struct mbedtls_des3_context Triple-DES context structure. More... void mbedtls_des_init (mbedtls_des_context *ctx) Initialize DES context. void mbedtls_des_free (mbedtls_des_context *ctx) Clear DES context. void mbedtls_des3_init (mbedtls_des3_context *ctx) Initialize Triple-DES context. void mbedtls_des3_free (mbedtls_des3_context *ctx) Clear Triple-DES context. void mbedtls_des_key_set_parity (unsigned char key[MBEDTLS_DES_KEY_SIZE]) Set key parity on the given key to odd. int mbedtls_des_key_check_key_parity (const unsigned char key[MBEDTLS_DES_KEY_SIZE]) Check that key parity on the given key is odd. int mbedtls_des_key_check_weak (const unsigned char key[MBEDTLS_DES_KEY_SIZE]) Check that key is not a weak or semi-weak DES key. int mbedtls_des_setkey_enc (mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE]) DES key schedule (56-bit, encryption) int mbedtls_des_setkey_dec (mbedtls_des_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE]) DES key schedule (56-bit, decryption) int mbedtls_des3_set2key_enc (mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE *2]) Triple-DES key schedule (112-bit, encryption) int mbedtls_des3_set2key_dec (mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE *2]) Triple-DES key schedule (112-bit, decryption) int mbedtls_des3_set3key_enc (mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE *3]) Triple-DES key schedule (168-bit, encryption) int mbedtls_des3_set3key_dec (mbedtls_des3_context *ctx, const unsigned char key[MBEDTLS_DES_KEY_SIZE *3]) Triple-DES key schedule (168-bit, decryption) int mbedtls_des_crypt_ecb (mbedtls_des_context *ctx, const unsigned char input[8], unsigned char output[8]) DES-ECB block encryption/decryption. int mbedtls_des_crypt_cbc (mbedtls_des_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output) DES-CBC buffer encryption/decryption. int mbedtls_des3_crypt_ecb (mbedtls_des3_context *ctx, const unsigned char input[8], unsigned char output[8]) 3DES-ECB block encryption/decryption int mbedtls_des3_crypt_cbc (mbedtls_des3_context *ctx, int mode, size_t length, unsigned char iv[8], const unsigned char *input, unsigned char *output) 3DES-CBC buffer encryption/decryption void mbedtls_des_setkey (uint32_t SK[32], const unsigned char key[MBEDTLS_DES_KEY_SIZE]) Internal function for key expansion. int mbedtls_des_self_test (int verbose) Checkup routine.
Detailed Description
DES block cipher.
Copyright (C) 2006-2015, ARM Limited, All Rights Reserved SPDX-License-Identifier: Apache-2.0
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
This file is part of mbed TLS (https://tls.mbed.org )
Definition in file des.h .
Function Documentation
int mbedtls_des3_crypt_cbc
(
mbedtls_des3_context * ctx ,
int
mode ,
size_t
length ,
unsigned char
iv [8],
const unsigned char *
input ,
unsigned char *
output
)
3DES-CBC buffer encryption/decryption
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:
ctx 3DES context mode MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_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 MBEDTLS_ERR_DES_INVALID_INPUT_LENGTH Definition at line 763 of file des.c .
int mbedtls_des3_crypt_ecb
(
mbedtls_des3_context * ctx ,
const unsigned char
input [8],
unsigned char
output [8]
)
3DES-ECB block encryption/decryption
Parameters:
ctx 3DES context input 64-bit input block output 64-bit output block
Returns: 0 if successful Definition at line 718 of file des.c .
Clear Triple-DES context.
Parameters:
ctx DES3 context to be cleared
Definition at line 328 of file des.c .
Initialize Triple-DES context.
Parameters:
ctx DES3 context to be initialized
Definition at line 323 of file des.c .
int mbedtls_des3_set2key_dec
(
mbedtls_des3_context * ctx ,
const unsigned char
key [MBEDTLS_DES_KEY_SIZE *2]
)
Triple-DES key schedule (112-bit, decryption)
Parameters:
ctx 3DES context to be initialized key 16-byte secret key
Returns: 0 Definition at line 565 of file des.c .
int mbedtls_des3_set2key_enc
(
mbedtls_des3_context * ctx ,
const unsigned char
key [MBEDTLS_DES_KEY_SIZE *2]
)
Triple-DES key schedule (112-bit, encryption)
Parameters:
ctx 3DES context to be initialized key 16-byte secret key
Returns: 0 Definition at line 551 of file des.c .
int mbedtls_des3_set3key_dec
(
mbedtls_des3_context * ctx ,
const unsigned char
key [MBEDTLS_DES_KEY_SIZE *3]
)
Triple-DES key schedule (168-bit, decryption)
Parameters:
ctx 3DES context to be initialized key 24-byte secret key
Returns: 0 Definition at line 616 of file des.c .
int mbedtls_des3_set3key_enc
(
mbedtls_des3_context * ctx ,
const unsigned char
key [MBEDTLS_DES_KEY_SIZE *3]
)
Triple-DES key schedule (168-bit, encryption)
Parameters:
ctx 3DES context to be initialized key 24-byte secret key
Returns: 0 Definition at line 602 of file des.c .
int mbedtls_des_crypt_cbc
(
mbedtls_des_context * ctx ,
int
mode ,
size_t
length ,
unsigned char
iv [8],
const unsigned char *
input ,
unsigned char *
output
)
DES-CBC buffer encryption/decryption.
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:
ctx DES context mode MBEDTLS_DES_ENCRYPT or MBEDTLS_DES_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
Definition at line 664 of file des.c .
int mbedtls_des_crypt_ecb
(
mbedtls_des_context * ctx ,
const unsigned char
input [8],
unsigned char
output [8]
)
DES-ECB block encryption/decryption.
Parameters:
ctx DES context input 64-bit input block output 64-bit output block
Returns: 0 if successful Definition at line 631 of file des.c .
Clear DES context.
Parameters:
ctx DES context to be cleared
Definition at line 315 of file des.c .
Initialize DES context.
Parameters:
ctx DES context to be initialized
Definition at line 310 of file des.c .
int mbedtls_des_key_check_key_parity
(
const unsigned char
key [MBEDTLS_DES_KEY_SIZE] )
Check that key parity on the given key is odd.
DES keys are 56 bits long, but each byte is padded with a parity bit to allow verification.
Parameters:
Returns: 0 is parity was ok, 1 if parity was not correct. Definition at line 358 of file des.c .
int mbedtls_des_key_check_weak
(
const unsigned char
key [MBEDTLS_DES_KEY_SIZE] )
Check that key is not a weak or semi-weak DES key.
Parameters:
Returns: 0 if no weak key was found, 1 if a weak key was identified. Definition at line 413 of file des.c .
void mbedtls_des_key_set_parity
(
unsigned char
key [MBEDTLS_DES_KEY_SIZE] )
Set key parity on the given key to odd.
DES keys are 56 bits long, but each byte is padded with a parity bit to allow verification.
Parameters:
Definition at line 347 of file des.c .
int mbedtls_des_self_test
(
int
verbose )
Checkup routine.
Returns: 0 if successful, or 1 if the test failed Definition at line 871 of file des.c .
void mbedtls_des_setkey
(
uint32_t
SK [32],
const unsigned char
key [MBEDTLS_DES_KEY_SIZE]
)
Internal function for key expansion.
(Only exposed to allow overriding it, see MBEDTLS_DES_SETKEY_ALT)
Parameters:
Definition at line 425 of file des.c .
int mbedtls_des_setkey_dec
(
mbedtls_des_context * ctx ,
const unsigned char
key [MBEDTLS_DES_KEY_SIZE]
)
DES key schedule (56-bit, decryption)
Parameters:
ctx DES context to be initialized key 8-byte secret key
Returns: 0 Definition at line 508 of file des.c .
int mbedtls_des_setkey_enc
(
mbedtls_des_context * ctx ,
const unsigned char
key [MBEDTLS_DES_KEY_SIZE]
)
DES key schedule (56-bit, encryption)
Parameters:
ctx DES context to be initialized key 8-byte secret key
Returns: 0 Definition at line 498 of file des.c .
1.7.2
