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
81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
// Copyright (C) 2016 Opsmate, Inc.
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License, v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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//
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// This software is distributed WITHOUT A WARRANTY OF ANY KIND.
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// See the Mozilla Public License for details.
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package certspotter
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import (
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"math/big"
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)
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type CertInfo struct {
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TBS *TBSCertificate
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Subject RDNSequence
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SubjectParseError error
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Issuer RDNSequence
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IssuerParseError error
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SANs []SubjectAltName
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SANsParseError error
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SerialNumber *big.Int
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SerialNumberParseError error
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Validity *CertValidity
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ValidityParseError error
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IsCA *bool
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IsCAParseError error
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IsPreCert bool
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}
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func MakeCertInfoFromTBS(tbs *TBSCertificate) *CertInfo {
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info := &CertInfo{TBS: tbs}
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info.Subject, info.SubjectParseError = tbs.ParseSubject()
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info.Issuer, info.IssuerParseError = tbs.ParseIssuer()
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info.SANs, info.SANsParseError = tbs.ParseSubjectAltNames()
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info.SerialNumber, info.SerialNumberParseError = tbs.ParseSerialNumber()
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info.Validity, info.ValidityParseError = tbs.ParseValidity()
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info.IsCA, info.IsCAParseError = tbs.ParseBasicConstraints()
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info.IsPreCert = len(tbs.GetExtension(oidExtensionCTPoison)) > 0
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return info
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}
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func MakeCertInfoFromRawTBS(tbsBytes []byte) (*CertInfo, error) {
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tbs, err := ParseTBSCertificate(tbsBytes)
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if err != nil {
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return nil, err
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}
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return MakeCertInfoFromTBS(tbs), nil
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}
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func MakeCertInfoFromRawCert(certBytes []byte) (*CertInfo, error) {
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cert, err := ParseCertificate(certBytes)
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if err != nil {
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return nil, err
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}
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return MakeCertInfoFromRawTBS(cert.GetRawTBSCertificate())
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}
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func MatchesWildcard(dnsName string, pattern string) bool {
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for len(pattern) > 0 {
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if pattern[0] == '*' {
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if len(dnsName) > 0 && dnsName[0] != '.' && MatchesWildcard(dnsName[1:], pattern) {
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return true
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}
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pattern = pattern[1:]
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} else {
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if len(dnsName) == 0 || pattern[0] != dnsName[0] {
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return false
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}
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pattern = pattern[1:]
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dnsName = dnsName[1:]
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}
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}
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return len(dnsName) == 0
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}
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