mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 13:38:12 +00:00
36 lines
1.1 KiB
Python
Executable File
36 lines
1.1 KiB
Python
Executable File
#!/usr/bin/env python
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from hashlib import sha256
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fn = "bootloader.dat"
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data = open(fn, "rb").read()
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if len(data) > 32768:
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raise Exception("bootloader has to be smaller than 32768 bytes")
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data += b"\x00" * (32768 - len(data))
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bh = sha256(sha256(data).digest()).digest()
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bl_hash = ", ".join("0x%02x" % x for x in bytearray(bh))
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bl_data = ", ".join("0x%02x" % x for x in bytearray(data))
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with open("bl_data.h", "wt") as f:
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f.write(f"static const uint8_t bl_hash[32] = {{{bl_hash}}};\n")
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f.write(f"static const uint8_t bl_data[32768] = {{{bl_data}}};\n")
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# make sure the last item listed in known_bootloader function
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# is our bootloader
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with open("bl_check.c", "rt") as f:
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hashes = []
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for l in f.readlines():
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if not len(l) >= 78 or not l.startswith(' "\\x'):
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continue
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l = l[14:78]
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h = ""
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for i in range(0, len(l), 4):
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h += l[i + 2 : i + 4]
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hashes.append(h)
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check = hashes[-2] + hashes[-1]
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if check != bh.hex():
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raise Exception("bootloader hash not listed in bl_check.c")
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