error when seed is too short

ipfs · Oct 17, 2023 · 0c5c370 · 0c5c370
1 parent f320981
commit 0c5c370
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/keys.go b/keys.go
@@ -4,6 +4,7 @@ import (
 	"crypto/ed25519"
 	crand "crypto/rand"
 	"crypto/sha256"
+	"errors"
 	"io"
 
 	libp2p "github.com/libp2p/go-libp2p/core/crypto"
@@ -29,6 +30,9 @@ func deriveKey(b58secret string, info []byte) (libp2p.PrivKey, error) {
 	if err != nil {
 		return nil, err
 	}
+	if len(secret) < seedBytes {
+		return nil, errors.New("derivation seed is too short")
+	}
 
 	hash := sha256.New
 	hkdf := hkdf.New(hash, secret, nil, info)