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generating random data with TPM added #5

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15 changes: 15 additions & 0 deletions pytss/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -474,6 +474,21 @@ def extend_pcr(self, pcr, data, event):
tss_lib.Tspi_Context_FreeMemory(self.context, blob[0])
return ret

def generate_random_data(self, length):
"""
Generates random data in TPM of the given length in bytes.

:param length: Length of data to generate in bytes

:return: bytearray containing the random data
"""
blob = ffi.new('BYTE **')
tss_lib.Tspi_TPM_GetRandom(self.get_handle(), length, blob)
ret = bytearray(blob[0][0:length])
tss_lib.Tspi_Context_FreeMemory(self.context, blob[0])
return ret


class TspiContext():
def __init__(self):
self.context = ffi.new('TSS_HCONTEXT *')
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