PolarSSL v1.2.8
Data Structures | Macros | Functions | Variables
test_suite_ctr_drbg.c File Reference
#include "fct.h"
#include <polarssl/config.h>
#include <polarssl/ctr_drbg.h>
#include <inttypes.h>
Include dependency graph for test_suite_ctr_drbg.c:

Go to the source code of this file.

Data Structures

struct  rnd_buf_info
 
struct  rnd_pseudo_info
 Info structure for the pseudo random function. More...
 

Macros

#define GET_UINT32_BE(n, b, i)
 
#define PUT_UINT32_BE(n, b, i)
 

Functions

int entropy_func (void *data, unsigned char *buf, size_t len)
 Retrieve entropy from the accumulator (Max ENTROPY_BLOCK_SIZE)
 
int ctr_drbg_init_entropy_len (ctr_drbg_context *ctx, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len, size_t entropy_len)
 
int unhexify (unsigned char *obuf, const char *ibuf)
 
void hexify (unsigned char *obuf, const unsigned char *ibuf, int len)
 
static int rnd_std_rand (void *rng_state, unsigned char *output, size_t len)
 This function just returns data from rand().
 
static int rnd_zero_rand (void *rng_state, unsigned char *output, size_t len)
 This function only returns zeros.
 
static int rnd_buffer_rand (void *rng_state, unsigned char *output, size_t len)
 This function returns random based on a buffer it receives.
 
static int rnd_pseudo_rand (void *rng_state, unsigned char *output, size_t len)
 This function returns random based on a pseudo random function.
 
 FCT_BGN ()
 
 FCT_END ()
 

Variables

int test_offset
 

Macro Definition Documentation

#define GET_UINT32_BE (   n,
  b,
 
)
Value:
{ \
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
| ( (uint32_t) (b)[(i) + 1] << 16 ) \
| ( (uint32_t) (b)[(i) + 2] << 8 ) \
| ( (uint32_t) (b)[(i) + 3] ); \
}

Definition at line 34 of file test_suite_ctr_drbg.c.

#define PUT_UINT32_BE (   n,
  b,
 
)
Value:
{ \
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 3] = (unsigned char) ( (n) ); \
}

Definition at line 44 of file test_suite_ctr_drbg.c.

Referenced by rnd_pseudo_rand().

Function Documentation

int ctr_drbg_init_entropy_len ( ctr_drbg_context ctx,
int(*)(void *, unsigned char *, size_t)  f_entropy,
void *  p_entropy,
const unsigned char *  custom,
size_t  len,
size_t  entropy_len 
)

Referenced by FCT_BGN().

int entropy_func ( void *  data,
unsigned char *  output,
size_t  len 
)

Retrieve entropy from the accumulator (Max ENTROPY_BLOCK_SIZE)

Parameters
dataEntropy context
outputBuffer to fill
lenLength of buffer
Returns
0 if successful, or POLARSSL_ERR_ENTROPY_SOURCE_FAILED

Definition at line 7 of file test_suite_ctr_drbg.c.

References test_offset.

Referenced by FCT_BGN().

FCT_BGN ( )
FCT_END ( )
void hexify ( unsigned char *  obuf,
const unsigned char *  ibuf,
int  len 
)

Definition at line 87 of file test_suite_ctr_drbg.c.

static int rnd_buffer_rand ( void *  rng_state,
unsigned char *  output,
size_t  len 
)
static

This function returns random based on a buffer it receives.

rng_state shall be a pointer to a rnd_buf_info structure.

The number of bytes released from the buffer on each call to the random function is specified by per_call. (Can be between 1 and 4)

After the buffer is empty it will return rand();

Definition at line 165 of file test_suite_ctr_drbg.c.

References rnd_buf_info::buf, rnd_buf_info::length, and rnd_std_rand().

static int rnd_pseudo_rand ( void *  rng_state,
unsigned char *  output,
size_t  len 
)
static

This function returns random based on a pseudo random function.

This means the results should be identical on all systems. Pseudo random is based on the XTEA encryption algorithm to generate pseudorandom.

rng_state shall be a pointer to a rnd_pseudo_info structure.

Definition at line 211 of file test_suite_ctr_drbg.c.

References rnd_pseudo_info::key, PUT_UINT32_BE, rnd_std_rand(), rnd_pseudo_info::v0, and rnd_pseudo_info::v1.

static int rnd_std_rand ( void *  rng_state,
unsigned char *  output,
size_t  len 
)
static

This function just returns data from rand().

Although predictable and often similar on multiple runs, this does not result in identical random on each run. So do not use this if the results of a test depend on the random data that is generated.

rng_state shall be NULL.

Definition at line 120 of file test_suite_ctr_drbg.c.

Referenced by rnd_buffer_rand(), and rnd_pseudo_rand().

static int rnd_zero_rand ( void *  rng_state,
unsigned char *  output,
size_t  len 
)
static

This function only returns zeros.

rng_state shall be NULL.

Definition at line 138 of file test_suite_ctr_drbg.c.

int unhexify ( unsigned char *  obuf,
const char *  ibuf 
)

Definition at line 53 of file test_suite_ctr_drbg.c.

Variable Documentation

int test_offset

Definition at line 6 of file test_suite_ctr_drbg.c.

Referenced by entropy_func(), and FCT_BGN().