fix(HeavyButter): encrypt sensitive bruce.conf fields at rest with AES-256-CBC#2524
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r13xr13 wants to merge 1 commit into
Open
fix(HeavyButter): encrypt sensitive bruce.conf fields at rest with AES-256-CBC#2524r13xr13 wants to merge 1 commit into
r13xr13 wants to merge 1 commit into
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…6-CBC - Derive AES-256 key from device MAC address via SHA-256 - Encrypt webUI creds, wifiAp creds, saved wifi passwords, API tokens - PKCS#7 padding, random IV per field, hex-encoded storage - Backward compatible: detects encrypted vs plaintext on load - Existing plaintext configs continue to work, re-save triggers encryption
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Summary
Encrypts sensitive credential fields in bruce.conf (stored on LittleFS/SD) using AES-256-CBC with a device-unique key derived from the MAC address.
Changes
encrypt_field()/decrypt_field()using mbedtls AES-256-CBC with PKCS#7 padding and random IV per fieldderive_config_key())IVhex:ciphertext_hexin JSONis_encrypted()detector ensures backward compatibility with existing plaintext bruce.conf filesSecurity Impact
Before: All credentials (WiFi passwords, API keys) stored in plaintext on LittleFS/SD card. Anyone who reads the device filesystem gets all credentials.
After: Credentials encrypted at rest with a device-unique key. Physical filesystem access no longer reveals plaintext passwords.