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cloudflare-native port of the tangled knot server
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2.0 kB · 85 lines
Go
at main
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586package commitverify
import ( "log"
"tangled.org/core/appview/db" "tangled.org/core/appview/models" "tangled.org/core/crypto" "tangled.org/core/types")
type verifiedCommit struct { fingerprint string hash string}
type VerifiedCommits map[verifiedCommit]struct{}
func (vcs VerifiedCommits) IsVerified(hash string) bool { for vc := range vcs { if vc.hash == hash { return true } } return false}
func (vcs VerifiedCommits) Fingerprint(hash string) string { for vc := range vcs { if vc.hash == hash { return vc.fingerprint } } return ""}
func GetVerifiedCommits(e db.Execer, emailToDid map[string]string, ndCommits []types.Commit) (VerifiedCommits, error) { vcs := VerifiedCommits{}
didPubkeyCache := make(map[string][]models.PublicKey)
for _, commit := range ndCommits { // skip unsigned commits early: no signature means no DB lookup needed, // and most commits in a typical log are unsigned. if commit.PGPSignature == "" { continue }
committerEmail := commit.Committer.Email if did, exists := emailToDid[committerEmail]; exists { // check if we've already fetched public keys for this did pubKeys, ok := didPubkeyCache[did] if !ok { // fetch and cache public keys keys, err := db.GetPublicKeysForDid(e, did) if err != nil { log.Printf("failed to fetch pubkey for %s: %v", committerEmail, err) continue } pubKeys = keys didPubkeyCache[did] = pubKeys }
// try to verify with any associated pubkeys payload := commit.Payload() signature := commit.PGPSignature for _, pk := range pubKeys { if _, ok := crypto.VerifySignature([]byte(pk.Key), []byte(signature), []byte(payload)); ok {
fp, err := crypto.SSHFingerprint(pk.Key) if err != nil { log.Println("error computing ssh fingerprint:", err) }
vc := verifiedCommit{fingerprint: fp, hash: commit.This} vcs[vc] = struct{}{} break } }
} }
return vcs, nil}