GenerateRandom

NAME
  GenerateRandom,
  CSSM_GenerateRandom,
  CSP_GenerateRandom function - Generate random data (CDSA)

SYNOPSIS
  # include <cssm.h>

   API:
       CSSM_RETURN CSSMAPI CSSM_GenerateRandom
       (CSSM_CC_HANDLE CCHandle,
       CSSM_DATA_PTR RandomNumber)
   SPI:
       CSSM_RETURN CSSMCSPI CSP_GenerateRandom
       (CSSM_CSP_HANDLE CSPHandle,
       CSSM_CC_HANDLE CCHandle,
       const CSSM_CONTEXT *Context,
       CSSM_DATA_PTR RandomNumber)

LIBRARY
  Common Security Services Manager library (CDSA$INCSSM300_SHR.EXE)

API PARAMETERS
  CCHandle (input)
          The handle that describes the context of this cryptographic
          operation used to link to the CSP-managed information.

  RandomNumber (output)
          Pointer to CSSM_DATA structure used to obtain the random
          number and the size of the random number in bytes.

SPI PARAMETERS
  CSPHandle (input)
          The handle that describes the add-in cryptographic service
          provider module used to perform calls to CSSM for the
          memory functions managed by CSSM.

  Context (input)
          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-
  specified 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 output 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 represent an error condition.

ERRORS
  Errors are described in the CDSA technical standard.  See CDSA.

  None specific to this call.

SEE ALSO
  Books

  Intel CDSA Application Developer's Guide (see CDSA)

  Other Help Topics