StasonJatham
e8f7d6bfdf
Single stateless Go process that consumes CT logs via embedded (patched) CertSpotter internals, classifies cloud/database/storage DNS identifiers in-process with a zero-allocation classifier, enriches via round-robin DNS resolvers with CNAME following, and batch-writes useful findings to PostgreSQL. - third_party/certspotter: 2-hunk IdentifierSink patch, no stdout/JSON/files - internal/classify: AWS/Azure/GCP/Firebase/Cloudflare R2/DigitalOcean/Supabase/OCI - internal/dns: sharded bounded TTL cache, multi-resolver load balancing + failover - internal/pipeline: bounded queues, dedup, direct-priority load shedding - internal/store: pgx batch writer, Postgres CT checkpoints (no cert contents) - internal/probe: optional non-destructive reachability checks (off by default) - Docker: distroless non-root, read-only rootfs, no app volume, resource limits - tests enforce 0 allocs/op on the classifier and sink hot path
54 lines
1.6 KiB
Markdown
54 lines
1.6 KiB
Markdown
# ctcloud patch to upstream CertSpotter
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This directory is a copy of upstream CertSpotter
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(https://github.com/SSLMate/certspotter), pulled in as a local module and
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wired up with a `replace` directive in the root `go.mod`.
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It is intentionally a copy (not a git submodule) so the patched tree lives in
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this repository and is compiled by the Docker build with no network access to a
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separate fork. To rebase on a newer upstream release:
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1. Replace this directory with the new upstream tree.
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2. Re-apply the two hunks below.
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## Changes (only two hunks)
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### `monitor/config.go`
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Adds an exported `IdentifierSink` interface and a `Config.IdentifierSink`
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field:
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```go
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type IdentifierSink interface {
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HandleIdentifiers(ctx context.Context, identifiers *certspotter.Identifiers)
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}
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```
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### `monitor/process.go`
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In `processCertificate`, immediately after `certInfo.ParseIdentifiers()`, hand
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the parsed identifiers to the sink and return, bypassing the watchlist,
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certificate-chain retrieval and notification paths:
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```go
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if config.IdentifierSink != nil {
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config.IdentifierSink.HandleIdentifiers(ctx, identifiers)
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return nil
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}
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```
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## Why
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The sink gives ctcloud parsed DNS identifiers via a direct in-process Go call:
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```text
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CT log entry -> CertSpotter parse -> IdentifierSink.HandleIdentifiers -> classifier
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```
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No stdout, no JSON, no files, no hooks, no subprocess. Setting the sink also
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skips issuer-chain fetching and the watchlist machinery, which is exactly the
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I/O and serialization overhead the design forbids.
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Upstream is otherwise unmodified. License and notices are preserved in
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`LICENSE`.
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