GenerateRandom(3)GenerateRandom(3)NAME
GenerateRandom, CSSM_GenerateRandom, CSP_GenerateRandom function - Gen‐
erate random data (CDSA)
SYNOPSIS
# include <cdsa/cssm.h>
API: CSSM_RETURN CSSMAPI CSSM_GenerateRandom (CSSM_CC_HANDLE CCHandle,
CSSM_DATA_PTR RandomNumber) SPI: CSSM_RETURN CSSMCSPI CSP_GenerateRan‐
dom (CSSM_CSP_HANDLE CSPHandle, CSSM_CC_HANDLE CCHandle, const
CSSM_CONTEXT *Context, CSSM_DATA_PTR RandomNumber)
LIBRARY
Common Security Services Manager library (libcssm.so)
API PARAMETERS
The handle that describes the context of this cryptographic operation
used to link to the CSP-managed information. Pointer to CSSM_DATA
structure used to obtain the random number and the size of the random
number in bytes.
SPI PARAMETERS
The handle that describes the add-in cryptographic service provider
module used to perform calls to CSSM for the memory functions managed
by CSSM. Pointer to CSSM_CONTEXT structure that describes the
attributes with this context.
DESCRIPTION
This function generates random data.
NOTES ON API
The output is returned to the caller either by filling the caller-spec‐
ified buffer or by using the application's declared memory allocation
functions to allocate buffer space. To specify a specific, preallocated
output buffer, the caller must provide an array of one or more
CSSM_DATA structures, each containing a Length field value greater than
zero and a non-NULL data pointer field value. To specify automatic out‐
put buffer allocation by the CSP, the caller must provide an array of
one or more CSSM_DATA structures, each containing a Length field value
equal to zero and a NULL data pointer field value. The application is
always responsible for deallocating the memory when it is no longer
needed.
NOTES ON SPI
The output is returned to the caller as specified in Buffer Management
for Cryptographic Services.
RETURN VALUE
A CSSM_RETURN value indicating success or specifying a particular error
condition. The value CSSM_OK indicates success. All other values repre‐
sent an error condition.
ERRORS
Errors are described in the CDSA technical standard. See
CDSA_intro(3).
None specific to this call.
SEE ALSO
Books
Intel CDSA Application Developer's Guide (see CDSA_intro(3))
Reference Pages
GenerateRandom(3)