tspi_tpm_getrandom(3) - Linux man page
TCG Software Stack Developer's Reference
Name
Tspi_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);
Description
Tspi_TPM_GetRandom gets a good random number for the purpose of generating 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 allocates memory, Tspi_Context_FreeMemory should also be used.
Return Codes
Tspi_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 To
Tspi_TPM_GetRandom conforms to the Trusted Computing Group Software Specification version 1.1 Golden