PolarSSL v1.3.7
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HMAC_DRBG (NIST SP 800-90A) More...
#include "md.h"
Go to the source code of this file.
Data Structures | |
struct | hmac_drbg_context |
HMAC_DRBG context. More... | |
Macros | |
#define | POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003 |
Too many random requested in single call. More... | |
#define | POLARSSL_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005 |
Input too large (Entropy + additional). More... | |
#define | POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007 |
Read/write error in file. More... | |
#define | POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009 |
The entropy source failed. More... | |
#define | POLARSSL_HMAC_DRBG_PR_OFF 0 |
No prediction resistance. More... | |
#define | POLARSSL_HMAC_DRBG_PR_ON 1 |
Prediction resistance enabled. More... | |
SECTION: Module settings | |
The configuration options you can set for this module are in this section. Either change them in config.h or define them on the compiler command line. | |
#define | POLARSSL_HMAC_DRBG_RESEED_INTERVAL 10000 |
Interval before reseed is performed by default. More... | |
#define | POLARSSL_HMAC_DRBG_MAX_INPUT 256 |
Maximum number of additional input bytes. More... | |
#define | POLARSSL_HMAC_DRBG_MAX_REQUEST 1024 |
Maximum number of requested bytes per call. More... | |
#define | POLARSSL_HMAC_DRBG_MAX_SEED_INPUT 384 |
Maximum size of (re)seed buffer. More... | |
Functions | |
int | hmac_drbg_init (hmac_drbg_context *ctx, const md_info_t *md_info, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len) |
HMAC_DRBG initialisation. More... | |
int | hmac_drbg_init_buf (hmac_drbg_context *ctx, const md_info_t *md_info, const unsigned char *data, size_t data_len) |
Initilisation of simpified HMAC_DRBG (never reseeds). More... | |
void | hmac_drbg_set_prediction_resistance (hmac_drbg_context *ctx, int resistance) |
Enable / disable prediction resistance (Default: Off) More... | |
void | hmac_drbg_set_entropy_len (hmac_drbg_context *ctx, size_t len) |
Set the amount of entropy grabbed on each reseed (Default: given by the security strength, which depends on the hash used, see hmac_drbg_init() ) More... | |
void | hmac_drbg_set_reseed_interval (hmac_drbg_context *ctx, int interval) |
Set the reseed interval (Default: POLARSSL_HMAC_DRBG_RESEED_INTERVAL) More... | |
void | hmac_drbg_update (hmac_drbg_context *ctx, const unsigned char *additional, size_t add_len) |
HMAC_DRBG update state. More... | |
int | hmac_drbg_reseed (hmac_drbg_context *ctx, const unsigned char *additional, size_t len) |
HMAC_DRBG reseeding (extracts data from entropy source) More... | |
int | hmac_drbg_random_with_add (void *p_rng, unsigned char *output, size_t output_len, const unsigned char *additional, size_t add_len) |
HMAC_DRBG generate random with additional update input. More... | |
int | hmac_drbg_random (void *p_rng, unsigned char *output, size_t out_len) |
HMAC_DRBG generate random. More... | |
void | hmac_drbg_free (hmac_drbg_context *ctx) |
Free an HMAC_DRBG context. More... | |
HMAC_DRBG (NIST SP 800-90A)
Copyright (C) 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 hmac_drbg.h.
#define POLARSSL_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009 |
The entropy source failed.
Definition at line 38 of file hmac_drbg.h.
#define POLARSSL_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007 |
Read/write error in file.
Definition at line 37 of file hmac_drbg.h.
#define POLARSSL_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005 |
Input too large (Entropy + additional).
Definition at line 36 of file hmac_drbg.h.
#define POLARSSL_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003 |
Too many random requested in single call.
Definition at line 35 of file hmac_drbg.h.
#define POLARSSL_HMAC_DRBG_MAX_INPUT 256 |
Maximum number of additional input bytes.
Definition at line 53 of file hmac_drbg.h.
#define POLARSSL_HMAC_DRBG_MAX_REQUEST 1024 |
Maximum number of requested bytes per call.
Definition at line 57 of file hmac_drbg.h.
#define POLARSSL_HMAC_DRBG_MAX_SEED_INPUT 384 |
Maximum size of (re)seed buffer.
Definition at line 61 of file hmac_drbg.h.
#define POLARSSL_HMAC_DRBG_PR_OFF 0 |
No prediction resistance.
Definition at line 66 of file hmac_drbg.h.
#define POLARSSL_HMAC_DRBG_PR_ON 1 |
Prediction resistance enabled.
Definition at line 67 of file hmac_drbg.h.
#define POLARSSL_HMAC_DRBG_RESEED_INTERVAL 10000 |
Interval before reseed is performed by default.
Definition at line 49 of file hmac_drbg.h.
void hmac_drbg_free | ( | hmac_drbg_context * | ctx | ) |
Free an HMAC_DRBG context.
ctx | HMAC_DRBG context to free. |
int hmac_drbg_init | ( | hmac_drbg_context * | ctx, |
const md_info_t * | md_info, | ||
int(*)(void *, unsigned char *, size_t) | f_entropy, | ||
void * | p_entropy, | ||
const unsigned char * | custom, | ||
size_t | len | ||
) |
HMAC_DRBG initialisation.
ctx | HMAC_DRBG context to be initialised |
md_info | MD algorithm to use for HMAC_DRBG |
f_entropy | Entropy callback (p_entropy, buffer to fill, buffer length) |
p_entropy | Entropy context |
custom | Personalization data (Device specific identifiers) (Can be NULL) |
len | Length of personalization data |
int hmac_drbg_init_buf | ( | hmac_drbg_context * | ctx, |
const md_info_t * | md_info, | ||
const unsigned char * | data, | ||
size_t | data_len | ||
) |
Initilisation of simpified HMAC_DRBG (never reseeds).
(For use with deterministic ECDSA.)
ctx | HMAC_DRBG context to be initialised |
md_info | MD algorithm to use for HMAC_DRBG |
data | Concatenation of entropy string and additional data |
data_len | Length of data in bytes |
int hmac_drbg_random | ( | void * | p_rng, |
unsigned char * | output, | ||
size_t | out_len | ||
) |
HMAC_DRBG generate random.
Note: Automatically reseeds if reseed_counter is reached or PR is enabled.
p_rng | HMAC_DRBG context |
output | Buffer to fill |
out_len | Length of the buffer |
int hmac_drbg_random_with_add | ( | void * | p_rng, |
unsigned char * | output, | ||
size_t | output_len, | ||
const unsigned char * | additional, | ||
size_t | add_len | ||
) |
HMAC_DRBG generate random with additional update input.
Note: Automatically reseeds if reseed_counter is reached or PR is enabled.
p_rng | HMAC_DRBG context |
output | Buffer to fill |
output_len | Length of the buffer |
additional | Additional data to update with (can be NULL) |
add_len | Length of additional data (can be 0) |
int hmac_drbg_reseed | ( | hmac_drbg_context * | ctx, |
const unsigned char * | additional, | ||
size_t | len | ||
) |
HMAC_DRBG reseeding (extracts data from entropy source)
ctx | HMAC_DRBG context |
additional | Additional data to add to state (Can be NULL) |
len | Length of additional data |
void hmac_drbg_set_entropy_len | ( | hmac_drbg_context * | ctx, |
size_t | len | ||
) |
Set the amount of entropy grabbed on each reseed (Default: given by the security strength, which depends on the hash used, see hmac_drbg_init()
)
ctx | HMAC_DRBG context |
len | Amount of entropy to grab, in bytes |
void hmac_drbg_set_prediction_resistance | ( | hmac_drbg_context * | ctx, |
int | resistance | ||
) |
Enable / disable prediction resistance (Default: Off)
Note: If enabled, entropy is used for ctx->entropy_len before each call! Only use this if you have ample supply of good entropy!
ctx | HMAC_DRBG context |
resistance | POLARSSL_HMAC_DRBG_PR_ON or POLARSSL_HMAC_DRBG_PR_OFF |
void hmac_drbg_set_reseed_interval | ( | hmac_drbg_context * | ctx, |
int | interval | ||
) |
Set the reseed interval (Default: POLARSSL_HMAC_DRBG_RESEED_INTERVAL)
ctx | HMAC_DRBG context |
interval | Reseed interval |
void hmac_drbg_update | ( | hmac_drbg_context * | ctx, |
const unsigned char * | additional, | ||
size_t | add_len | ||
) |
HMAC_DRBG update state.
ctx | HMAC_DRBG context |
additional | Additional data to update state with, or NULL |
add_len | Length of additional data, or 0 |