mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2024-06-14 00:52:21 +00:00
104 lines
3.1 KiB
Python
Executable File
104 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python
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"""Convert python strings to UTF16 USB descriptors"""
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def descriptor_to_string(descriptor: bytes) -> str:
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""" Convert a USB string descriptor into a python string
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Keyword arguments:
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descriptor -- UTF-16 formatted USB descriptor string
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"""
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b_length = descriptor[0]
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if b_length != len(descriptor):
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raise ValueError(
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'Length mismatch, ' +
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f'length_field:{b_length} length:{len(descriptor)}')
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b_descriptor_type = descriptor[1]
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if b_descriptor_type != 0x03:
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raise ValueError(
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f'Type mismatch, bDescriptorType:{b_descriptor_type:02x}'
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+ 'expected:0x03')
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return descriptor[2:].decode('utf-16', errors='strict')
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def string_to_descriptor(string: str) -> bytes:
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""" Convert a python string into a USB string descriptor
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Keyword arguments:
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string: String to convert
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"""
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descriptor = bytearray()
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descriptor.append(0x00) # placeholder for length
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descriptor.append(0x03)
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descriptor.extend(string.encode('utf-16')[2:]) # crop the BOM
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descriptor[0] = len(descriptor)
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return bytes(descriptor)
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if __name__ == "__main__":
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MANUFACTURER = 'Mullvad'
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PRODUCT = 'MTA1-USB-V1'
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SERIAL = "68de5d27-e223-4874-bc76-a54d6e84068f"
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# serial = bytes([
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# 0x14,0x03,
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# 0x32,0x00,0x30,0x00,0x31,0x00,0x37,0x00,0x2D,0x00,
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# 0x32,0x00,0x2D,0x00,
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# 0x32,0x00,0x35,0x00
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# ])
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# print(descriptor_to_string(serial))
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# sample_product = bytes([
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# 0x14,0x03,
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# 0x43,0x00,0x48,0x00,0x35,0x00,0x35,0x00,0x34,0x00,0x5F,0x00,
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# 0x43,0x00,0x44,0x00,0x43,0x00
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# ])
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# print(descriptor_to_string(sample_product))
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# rt = string_to_descriptor(descriptor_to_string(sample_product))
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# print(descriptor_to_string(rt))
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#
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# print(['{:02x} '.format(i) for i in sample_product])
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# print(['{:02x} '.format(i) for i in rt])
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# sample_mfr = bytes([
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# 0x0A,0x03,
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# 0x5F,0x6c,0xCF,0x82,0x81,0x6c,0x52,0x60,
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# ])
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# print(descriptor_to_string(sample_mfr))
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# rt = string_to_descriptor(descriptor_to_string(sample_mfr))
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# print(descriptor_to_string(rt))
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#
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# print(['{:02x} '.format(i) for i in sample_mfr])
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# print(['{:02x} '.format(i) for i in rt])
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with open('usb_strings.h', 'w', encoding='utf-8') as f:
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f.write('#ifndef USB_STRINGS\n')
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f.write('#define USB_STRINGS\n')
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f.write(
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f'unsigned char __code Prod_Des[]={{ // "{PRODUCT}"\n')
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f.write(' ')
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f.write(', '.join([f'0x{i:02x}'
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for i in string_to_descriptor(PRODUCT)]))
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f.write('\n};\n')
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f.write(
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'unsigned char __code Manuf_Des[]={ ' +
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f'// "{MANUFACTURER}"\n')
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f.write(' ')
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f.write(', '.join([f'0x{i:02x}'
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for i in string_to_descriptor(MANUFACTURER)]))
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f.write('\n};\n')
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f.write(
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f'unsigned char __code SerDes[]={{ // "{SERIAL}"\n')
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f.write(' ')
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f.write(', '.join([f'0x{i:02x}'
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for i in string_to_descriptor(SERIAL)]))
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f.write('\n};\n')
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f.write('#endif\n')
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