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Functions
RAND crypto functions

Functions

void RAND_seed (const void *indata, size_t size)
 
int RAND_bytes (void *outdata, size_t size)
 
void RAND_cleanup (void)
 
void RAND_add (const void *indata, size_t size, double entropi)
 
int RAND_pseudo_bytes (void *outdata, size_t size)
 
int RAND_status (void)
 
int RAND_set_rand_method (const RAND_METHOD *meth)
 
const RAND_METHOD * RAND_get_rand_method (void)
 
int RAND_set_rand_engine (ENGINE *engine)
 
int RAND_load_file (const char *filename, size_t size)
 
int RAND_write_file (const char *filename)
 
const char * RAND_file_name (char *filename, size_t size)
 

Detailed Description

See the RAND - random number for description and examples.

Function Documentation

void RAND_add ( const void *  indata,
size_t  size,
double  entropi 
)

Seed that random number generator. Secret material can securely be feed into the function, they will never be returned.

Parameters
indatathe input data.
sizesize of in data.
entropientropi in data.
int RAND_bytes ( void *  outdata,
size_t  size 
)

Get a random block from the random generator, can be used for key material.

Parameters
outdatarandom data
sizelength random data
Returns
1 on success, 0 on failure.
void RAND_cleanup ( void  )

Reset and free memory used by the random generator.

const char* RAND_file_name ( char *  filename,
size_t  size 
)

Return the default random state filename for a user to use for RAND_load_file(), and RAND_write_file().

Parameters
filenamebuffer to hold file name.
sizesize of buffer filename.
Returns
the buffer filename or NULL on failure.
const RAND_METHOD* RAND_get_rand_method ( void  )

Get the default random method.

int RAND_load_file ( const char *  filename,
size_t  size 
)

Load a a file and feed it into RAND_seed().

Parameters
filenamename of file to read.
sizeminimum size to read.
int RAND_pseudo_bytes ( void *  outdata,
size_t  size 
)

Get a random block from the random generator, should NOT be used for key material.

Parameters
outdatarandom data
sizelength random data
Returns
1 on success, 0 on failure.
void RAND_seed ( const void *  indata,
size_t  size 
)

Seed that random number generator. Secret material can securely be feed into the function, they will never be returned.

Parameters
indataseed data
sizelength seed data
int RAND_set_rand_engine ( ENGINE *  engine)

Set the default random method from engine.

Parameters
engineuse engine, if NULL is passed it, old method and engine is cleared.
Returns
1 on success, 0 on failure.
int RAND_set_rand_method ( const RAND_METHOD *  meth)

Set the default random method.

Parameters
methset the new default method.
Returns
1 on success.
int RAND_status ( void  )

Return status of the random generator

Returns
1 if the random generator can deliver random data.
int RAND_write_file ( const char *  filename)

Write of random numbers to a file to store for later initiation with RAND_load_file().

Parameters
filenamename of file to write.
Returns
1 on success and non-one on failure.

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