mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-19 22:18:13 +00:00
53 lines
1.4 KiB
Python
Executable File
53 lines
1.4 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import struct
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import re
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import binascii
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import os
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import imp
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png2toi = imp.load_source('png2toi', os.path.dirname(__file__) + '/png2toi')
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# encode vendor name, add length byte and padding to multiple of 4
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def encodevendor(vname):
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vbin = vname.encode('utf-8')
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vbin = struct.pack('<B',len(vbin)) + vbin
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vbin += b'\0' * (-len(vbin) & 3)
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return vbin
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def encodekey(key):
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if len(key) != 64:
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raise Exception("Wrong key length")
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return binascii.unhexlify(key)
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def main():
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if len(sys.argv) < 7:
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print('Usage build_vendorheader key1hex,... m version vendorname vendorimage.png vendorimage.bin')
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return 1
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keys = [encodekey(x) for x in sys.argv[1].split(',')]
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m = int(sys.argv[2])
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(vmajor, vminor) = [int(x) for x in sys.argv[3].split('.')]
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vname = sys.argv[4]
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ifn = sys.argv[5]
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ofn = sys.argv[6]
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if not ifn.endswith('.png'):
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print('Must provide PNG file')
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return 2
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expiry = 0
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vheader = b'TRZV' + struct.pack('<IIBBBB', 0, expiry, vmajor, vminor, m, len(keys))
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for k in keys:
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vheader += k
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vheader += encodevendor(vname) + png2toi.process_image(ifn)
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padding = 65 + (-len(vheader) - 65) & 511
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vheader += b'\0' * padding
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# put in length
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vheader = vheader[0:4] + struct.pack('<I', len(vheader)) + vheader[8:]
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with open(ofn, 'wb') as f:
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f.write(vheader)
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main()
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