From 135e8efbc6020be40cec18682c180089d3eabf8d Mon Sep 17 00:00:00 2001
From: Mark Spanbroek <mark@spanbroek.net>
Date: Wed, 11 Dec 2024 10:15:47 +0100
Subject: [PATCH] sign and verify hashes

---
 codexvalidator/signatures.nim           | 7 +++++++
 tests/codexvalidator/testSignatures.nim | 8 ++++++++
 2 files changed, 15 insertions(+)

diff --git a/codexvalidator/signatures.nim b/codexvalidator/signatures.nim
index 888a359..0143b3b 100644
--- a/codexvalidator/signatures.nim
+++ b/codexvalidator/signatures.nim
@@ -1,5 +1,6 @@
 import pkg/blscurve
 import pkg/nimcrypto
+import ./hashing
 
 export blscurve.Signature
 export blscurve.sign
@@ -19,3 +20,9 @@ proc random*(_: type Identity, identity: var Identity) =
 
 func identifier*(identity: Identity): Identifier =
   doAssert publicFromSecret(result, identity)
+
+func sign*(identity: Identity, hash: Hash): Signature =
+  identity.sign(hash.data)
+
+func verify*(signature: Signature, identifier: Identifier, hash: Hash): bool =
+  identifier.verify(hash.toBytes(), signature)
diff --git a/tests/codexvalidator/testSignatures.nim b/tests/codexvalidator/testSignatures.nim
index 20fdbea..1489bfc 100644
--- a/tests/codexvalidator/testSignatures.nim
+++ b/tests/codexvalidator/testSignatures.nim
@@ -1,5 +1,6 @@
 import ./basics
 import pkg/blscurve
+import codexvalidator/hashing
 import codexvalidator/signatures
 
 suite "Signature scheme":
@@ -41,3 +42,10 @@ suite "Signature scheme":
     let signature = identity1.sign(message)
     check identity1.identifier.verify(message, signature)
     check not identity2.identifier.verify(message, signature)
+
+  test "identity can sign and verify hashes":
+    var identity: Identity
+    Identity.random(identity)
+    let hash = Hash.example
+    let signature = identity.sign(hash)
+    check signature.verify(identity.identifier, hash)