mirror of
https://github.com/Kpa-clawbot/meshcore-analyzer.git
synced 2026-04-21 11:45:40 +00:00
c233c14156
## Summary
Adds `corescope-decrypt` — a standalone CLI tool that decrypts and
exports MeshCore hashtag channel messages from a CoreScope SQLite
database.
### What it does
MeshCore hashtag channels use symmetric encryption with keys derived
from the channel name. The CoreScope ingestor stores **all** GRP_TXT
packets, even those it can't decrypt. This tool enables retroactive
decryption — decrypt historical messages for any channel whose name you
learn after the fact.
### Architecture
- **`internal/channel/`** — Shared crypto package extracted from
ingestor logic:
- `DeriveKey()` — `SHA-256("#name")[:16]`
- `ChannelHash()` — 1-byte packet filter (`SHA-256(key)[0]`)
- `Decrypt()` — HMAC-SHA256 MAC verify + AES-128-ECB
- `ParsePlaintext()` — timestamp + flags + "sender: message" parsing
- **`cmd/decrypt/`** — CLI binary with three output formats:
- `--format json` — Full metadata (observers, path, raw hex)
- `--format html` — Self-contained interactive viewer with search/sort
- `--format irc` (or `log`) — Plain-text IRC-style log, greppable
### Usage
```bash
# JSON export
corescope-decrypt --channel "#wardriving" --db meshcore.db
# Interactive HTML viewer
corescope-decrypt --channel wardriving --db meshcore.db --format html --output wardriving.html
# Greppable log
corescope-decrypt --channel "#wardriving" --db meshcore.db --format irc | grep "KE6QR"
# From Docker
docker exec corescope-prod /app/corescope-decrypt --channel "#wardriving" --db /app/data/meshcore.db
```
### Build & deployment
- Statically linked (`CGO_ENABLED=0`) — zero dependencies
- Added to Dockerfile (available at `/app/corescope-decrypt` in
container)
- CI: builds and tests in go-test job
- CI: attaches linux/amd64 and linux/arm64 binaries to GitHub Releases
on tags
### Testing
- `internal/channel/` — 9 tests: key derivation, encrypt/decrypt
round-trip, MAC rejection, wrong-channel rejection, plaintext parsing
- `cmd/decrypt/` — 7 tests: payload extraction, channel hash
consistency, all 3 output formats, JSON parseability, fixture DB
integration
- Verified against real fixture DB: successfully decrypts 17
`#wardriving` messages
### Limitations
- Hashtag channels only (name-derived keys). Custom PSK channels not
supported.
- No DM decryption (asymmetric, per-peer keys).
- Read-only database access.
Fixes #723
---------
Co-authored-by: you <you@example.com>
74 lines
2.3 KiB
Docker
74 lines
2.3 KiB
Docker
FROM golang:1.22-alpine AS builder
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RUN apk add --no-cache build-base
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ARG APP_VERSION=unknown
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ARG GIT_COMMIT=unknown
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ARG BUILD_TIME=unknown
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# Build server
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WORKDIR /build/server
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COPY cmd/server/go.mod cmd/server/go.sum ./
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COPY internal/geofilter/ ../../internal/geofilter/
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COPY internal/sigvalidate/ ../../internal/sigvalidate/
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RUN go mod download
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COPY cmd/server/ ./
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RUN go build -ldflags "-X main.Version=${APP_VERSION} -X main.Commit=${GIT_COMMIT} -X main.BuildTime=${BUILD_TIME}" -o /corescope-server .
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# Build ingestor
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WORKDIR /build/ingestor
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COPY cmd/ingestor/go.mod cmd/ingestor/go.sum ./
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COPY internal/geofilter/ ../../internal/geofilter/
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COPY internal/sigvalidate/ ../../internal/sigvalidate/
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RUN go mod download
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COPY cmd/ingestor/ ./
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RUN go build -o /corescope-ingestor .
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# Build decrypt CLI
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WORKDIR /build/decrypt
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COPY cmd/decrypt/go.mod cmd/decrypt/go.sum ./
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COPY internal/channel/ ../../internal/channel/
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RUN go mod download
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COPY cmd/decrypt/ ./
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RUN CGO_ENABLED=0 go build -ldflags="-s -w" -o /corescope-decrypt .
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# Runtime image
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FROM alpine:3.20
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RUN apk add --no-cache mosquitto mosquitto-clients supervisor caddy wget
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WORKDIR /app
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# Go binaries
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COPY --from=builder /corescope-server /corescope-ingestor /corescope-decrypt /app/
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# Frontend assets + config
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COPY public/ ./public/
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COPY config.example.json channel-rainbow.json ./
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# Bake git commit SHA — manage.sh and CI write .git-commit before build
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# Default to "unknown" if not provided
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RUN echo "unknown" > .git-commit
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# Supervisor + Mosquitto + Caddy config
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COPY docker/supervisord-go.conf /etc/supervisor/conf.d/supervisord.conf
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COPY docker/supervisord-go-no-mosquitto.conf /etc/supervisor/conf.d/supervisord-no-mosquitto.conf
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COPY docker/supervisord-go-no-caddy.conf /etc/supervisor/conf.d/supervisord-no-caddy.conf
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COPY docker/supervisord-go-no-mosquitto-no-caddy.conf /etc/supervisor/conf.d/supervisord-no-mosquitto-no-caddy.conf
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COPY docker/mosquitto.conf /etc/mosquitto/mosquitto.conf
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COPY docker/Caddyfile /etc/caddy/Caddyfile
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# Data directory
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RUN mkdir -p /app/data /var/lib/mosquitto /data/caddy && \
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chown -R mosquitto:mosquitto /var/lib/mosquitto
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# Entrypoint
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COPY docker/entrypoint-go.sh /entrypoint.sh
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RUN chmod +x /entrypoint.sh
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EXPOSE 80 443 1883
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VOLUME ["/app/data", "/data/caddy"]
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ENTRYPOINT ["/entrypoint.sh"]
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