arno/trezor-firmware
1
0
Fork 0
mirror of https://github.com/trezor/trezor-firmware.git synced 2025-01-03 12:00:59 +00:00
Code Issues Releases Wiki Activity

fixup! fixup! fixup! fixup! wip: single packet decryption (not finished) [no changelog]

Browse Source
This commit is contained in:
M1nd3r 2024-12-19 18:13:12 +01:00
parent 5e4ecdaf13
commit a92c254f62
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
core/src/trezor/wire/thp/channel.py
View File

@ -202,8 +202,8 @@ class Channel:
self.temp_crc = checksum.compute_int(buf, self.temp_crc)
elif self.expected_payload_length >= len(buf) + self.bytes_read:
# At least a part of the CRC checksum is in this packet, compute CRC over
# first (max(0, crc_copy_len)) bytes and add the rest of the bytes (max 4)
# as the checksum from message into temp_crc_compare
# the first (max(0, crc_copy_len)) bytes and add the rest of the bytes
# (max 4) as the checksum from message into temp_crc_compare
crc_copy_len = (
self.expected_payload_length - self.bytes_read - CHECKSUM_LENGTH
)
@ -230,9 +230,9 @@ class Channel:
# The noise tag is not in this packet, decrypt the whole buffer
self.busy_decoder.decrypt_part(buf)
elif self.expected_payload_length >= len(buf) + self.bytes_read:
# At least a part of the CRC checksum is in this packet, compute CRC over
# first (max(0, crc_copy_len)) bytes and add the rest of the bytes
# as the checksum from message into temp_crc_compare
# At least a part of the noise tag is in this packet, decrypt
# the first (max(0, dec_len)) bytes and add the rest of the bytes
# as the noise_tag from message into temp_tag
dec_len = (
self.expected_payload_length
- self.bytes_read