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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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