Tighten the encryption steps to spell out:
- Plaintext is zero-padded on the right to a multiple of 16 bytes
before AES-128-ECB encryption.
- The padding is NOT PKCS#7 (not unambiguous); the receiver must
disambiguate trailing zeros using the inner plaintext format
(e.g., for TXT_MSG, by C-string NUL termination scan).
- Renumber steps so the padding step is explicit and ordered before
encryption, instead of being a parenthetical on the encrypt step.
Validated against upstream meshcore-dev/MeshCore @ 1a7b361
(Utils::encrypt / Utils::decrypt, src/Utils.cpp:30-, comment
"dest may contain trailing zero bytes in final block").
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
swaitsandClaude Opus 4.7
c0f9c22efd