mirror of
https://github.com/trezor/trezor-firmware.git
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56 lines
1.7 KiB
Python
Executable File
56 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# This file is part of the Trezor project.
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#
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# Copyright (C) SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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# example usage: ./rng_entropy_collector.py stm32_rng_1.dat 1048576
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# note: for reading large amounts of entropy, compile a firmware
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# that has DEBUG_RNG == 1 as that will disable the user button
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# push confirmation
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import io
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import sys
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from trezorlib import misc
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from trezorlib.client import TrezorClient
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from trezorlib.transport import get_transport
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def main() -> None:
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try:
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transport = get_transport()
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transport.open()
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client = TrezorClient(transport)
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session = client.get_seedless_session()
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except Exception as e:
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print(e)
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return
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arg1 = sys.argv[1] # output file
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arg2 = int(sys.argv[2], 10) # total number of how many bytes of entropy to read
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step = 1024 if arg2 >= 1024 else arg2 # trezor will only return 1KB at a time
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with io.open(arg1, "wb") as f:
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for _ in range(0, arg2, step):
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entropy = misc.get_entropy(session, step)
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f.write(entropy)
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transport.close()
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if __name__ == "__main__":
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main()
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