Files
KAT/docs/README.md
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KaraZajac 48ee413c9b v1.2.0: Add 4 new protocols, fix 5 existing, port Kia V6 encoder
New protocols (from ProtoPirate):
- Mazda V0: 433MHz, pair-based decoding, XOR deobfuscation
- Mitsubishi V0: 868MHz, PWM, bit negation + XOR unscrambling
- Porsche Touareg: 433/868MHz, sync preamble, 24-bit rotate cipher
- Fiat V1 (Magneti Marelli BSI): 433MHz, auto-detected timing variants

Protocol fixes aligned with ProtoPirate reference:
- Kia V1: Fix Manchester level mapping (inverted convention), off-by-one
  bit count, CRC4 simplified to 7 bytes + offset 1
- Kia V2: Fix CRC byte layout (was double-counting nibbles), off-by-one
  bit count, preamble short-HIGH handling
- Fiat V0: Fix endbyte transform (remove (<<1)|1), standard Manchester
  encoder (was differential), 7 btn bits (was 6), gap path fallback
- PSA: Fix modified TEA (XTEA-like dynamic key selection), XOR decrypt
  byte mapping, critical key2_low construction bug, encoder polarity and
  preamble, add key1_high nibble validation, dual preamble patterns
- Ford V0: Add calculate_checksum (sums all serial+count bytes) for encoder

Kia V6 encoder ported:
- Forward AES-128 (SubBytes, ShiftRows, MixColumns, encrypt)
- encrypt_payload: build plaintext, AES encrypt, pack into 3 parts
- Two-pass Manchester upload (640 + 38 preamble pairs)
- fx_field extraction stored in DecodedSignal.extra for encode roundtrip

Updated README, protocol docs, and version bump to 1.2.0.
2026-03-22 12:05:01 -04:00

1.9 KiB

KAT Protocol Documentation

This folder describes how each keyfob protocol supported by KAT works. Each document corresponds to a decoder/encoder in src/protocols/.

Capture/encode model: Decoded signals expose optional extra (e.g. VAG: vag_type + key_idx). When present, the app stores it in Capture.data_extra so retransmit can encode from the capture without decoder instance state. See vag.md for the VAG encode-from-capture flow.

Protocol Rust module Doc
Kia V0 kia_v0.rs kia_v0.md
Kia V1 kia_v1.rs kia_v1.md
Kia V2 kia_v2.rs kia_v2.md
Kia V3/V4 kia_v3_v4.rs kia_v3_v4.md
Kia V5 kia_v5.rs kia_v5.md
Kia V6 kia_v6.rs kia_v6.md
Ford V0 ford_v0.rs ford_v0.md
Subaru subaru.rs subaru.md
VAG vag.rs vag.md
Fiat V0 fiat_v0.rs fiat_v0.md
Fiat V1 fiat_v1.rs fiat_v1.md
Mazda V0 mazda_v0.rs mazda_v0.md
Mitsubishi V0 mitsubishi_v0.rs mitsubishi_v0.md
Porsche Touareg porsche_touareg.rs porsche_touareg.md
Suzuki suzuki.rs suzuki.md
Scher-Khan scher_khan.rs scher_khan.md
Star Line star_line.rs star_line.md
PSA psa.rs psa.md
KeeLoq generic (fallback) keeloq_generic.rs keeloq_generic.md

KeeLoq generic is not a registered decoder; it runs when no protocol matches and tries KeeLoq with every keystore manufacturer key (using keeloq_common). Successful decodes appear as Keeloq (keystore name).

Implementations are aligned with the ProtoPirate reference in REFERENCES/ProtoPirate/protocols/.