Tspi_TPM_GetRandom(3)Tspi_TPM_GetRandom(3)
TCG Software Stack Developer's Reference
NAMETspi_TPM_GetRandom - generate a random number on the TPM
SYNOPSIS
#include <tss/platform.h>
#include <tss/tcpa_defines.h>
#include <tss/tcpa_typedef.h>
#include <tss/tcpa_struct.h>
#include <tss/tss_typedef.h>
#include <tss/tss_structs.h>
#include <tss/tspi.h>
TSS_RESULT Tspi_TPM_GetRandom(TSS_HTPM hTPM, UINT32 size, BYTE** random);
DESCRIPTIONTspi_TPM_GetRandom gets a good random number for the purpose of gener‐
ating symmetric keys, nonces, or seeding a random number generator.
PARAMETERS
hTPM
The hTPM parameter is used to specify the handle of the TPM object. The
command to get the TPM to test itself will be sent here.
size
The size parameter is the number of random bytes requested.
random
The random parameter is a pointer to memory containing the random data.
This is where the generated number goes. Because this internally allo‐
cates memory, Tspi_Context_FreeMemory should also be used.
RETURN CODESTspi_TPM_GetRandom returns TSS_SUCCESS on success, otherwise one of the
following values is returned:
TSS_E_INVALID_HANDLE
hTPM is not a valid handle.
TSS_E_INTERNAL_ERROR
An internal SW error has been detected.
TSS_E_BAD_PARAMETER
One or more parameters is bad.
CONFORMING TOTspi_TPM_GetRandom conforms to the Trusted Computing Group Software
Specification version 1.1 Golden
SEE ALSOTspi_Context_FreeMemory(3).
TSS 1.1 2004-05-25 Tspi_TPM_GetRandom(3)