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authorLinus Nordberg <linus@nordberg.se>2022-05-24 23:33:38 +0200
committerRasmus Dahlberg <rasmus@mullvad.net>2022-06-23 11:33:17 +0200
commit559bccccd40d028e412d9f11709ded0250ba6dcd (patch)
tree50f3193dbe70fec21357963c11e5f663013f4b4c /pkg/instance/experimental.go
parent4b20ef0c1732bcef633c0ed7104501898aa84e2c (diff)
implement primary and secondary role, for replicationv0.5.0
Diffstat (limited to 'pkg/instance/experimental.go')
-rw-r--r--pkg/instance/experimental.go85
1 files changed, 0 insertions, 85 deletions
diff --git a/pkg/instance/experimental.go b/pkg/instance/experimental.go
deleted file mode 100644
index 24feeaf..0000000
--- a/pkg/instance/experimental.go
+++ /dev/null
@@ -1,85 +0,0 @@
-package instance
-
-import (
- "bytes"
- "context"
- "crypto"
- "crypto/ed25519"
- "crypto/sha256"
- "encoding/base64"
- "encoding/binary"
- "fmt"
- "net/http"
-
- "git.sigsum.org/sigsum-go/pkg/log"
- "git.sigsum.org/sigsum-go/pkg/types"
-)
-
-// algEd25519 identifies a checkpoint signature algorithm
-const algEd25519 byte = 1
-
-// getCheckpoint is an experimental endpoint that is not part of the official
-// Sigsum API. Documentation can be found in the transparency-dev repo.
-func getCheckpoint(ctx context.Context, i *Instance, w http.ResponseWriter, r *http.Request) (int, error) {
- log.Debug("handling get-checkpoint request")
- sth, err := i.Stateman.ToCosignTreeHead(ctx)
- if err != nil {
- return http.StatusInternalServerError, err
- }
- if err := i.signWriteNote(w, sth); err != nil {
- return http.StatusInternalServerError, err
- }
- return http.StatusOK, nil
-}
-
-// signWriteNote signs and writes a checkpoint which uses "sigsum.org:<prefix>"
-// as origin string. Origin string is also used as ID in the note signature.
-// This means that a sigsum log's prefix (say, "glass-frog"), must be unique.
-func (i *Instance) signWriteNote(w http.ResponseWriter, sth *types.SignedTreeHead) error {
- origin := fmt.Sprintf("sigsum.org:%s", i.Prefix)
- msg := fmt.Sprintf("%s\n%d\n%s\n",
- origin,
- sth.TreeSize,
- base64.StdEncoding.EncodeToString(sth.RootHash[:]),
- )
- sig, err := noteSign(i.Signer, origin, msg)
- if err != nil {
- return err
- }
-
- fmt.Fprintf(w, "%s\n\u2014 %s %s\n", msg, origin, sig)
- return nil
-}
-
-// noteSign returns a note signature for the provided origin and message
-func noteSign(signer crypto.Signer, origin, msg string) (string, error) {
- sig, err := signer.Sign(nil, []byte(msg), crypto.Hash(0))
- if err != nil {
- return "", err
- }
-
- var hbuf [4]byte
- binary.BigEndian.PutUint32(hbuf[:], noteKeyHash(origin, notePubKeyEd25519(signer)))
- sig = append(hbuf[:], sig...)
- return base64.StdEncoding.EncodeToString(sig), nil
-}
-
-// See:
-// https://cs.opensource.google/go/x/mod/+/refs/tags/v0.5.1:sumdb/note/note.go;l=336
-func notePubKeyEd25519(signer crypto.Signer) []byte {
- return bytes.Join([][]byte{
- []byte{algEd25519},
- signer.Public().(ed25519.PublicKey),
- }, nil)
-}
-
-// Source:
-// https://cs.opensource.google/go/x/mod/+/refs/tags/v0.5.1:sumdb/note/note.go;l=222
-func noteKeyHash(name string, key []byte) uint32 {
- h := sha256.New()
- h.Write([]byte(name))
- h.Write([]byte("\n"))
- h.Write(key)
- sum := h.Sum(nil)
- return binary.BigEndian.Uint32(sum)
-}