From c6addff55123667f5fc4acaca8d697dc3048a249 Mon Sep 17 00:00:00 2001
From: Jeremy Rand <jeremyrand@airmail.cc>
Date: Wed, 1 Dec 2021 02:37:37 +0000
Subject: [PATCH] p11mod: Implement DestroyObject

Refs https://github.com/namecoin/pkcs11mod/issues/46
---
 p11mod/p11mod.go | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/p11mod/p11mod.go b/p11mod/p11mod.go
index eb42572..6843b5a 100644
--- a/p11mod/p11mod.go
+++ b/p11mod/p11mod.go
@@ -314,9 +314,22 @@ func (ll *llBackend) CopyObject(sh pkcs11.SessionHandle, o pkcs11.ObjectHandle,
 }
 
 func (ll *llBackend) DestroyObject(sh pkcs11.SessionHandle, oh pkcs11.ObjectHandle) error {
-	// TODO
-	log.Println("p11mod DestroyObject: not implemented")
-	return pkcs11.Error(pkcs11.CKR_FUNCTION_NOT_SUPPORTED)
+	session, err := ll.getSessionByHandle(sh)
+	if err != nil {
+		return err
+	}
+
+	// Handles are 1-indexed, while our slice is 0-indexed.
+	objectIndex := int(oh-1)
+
+	if objectIndex < 0 || objectIndex >= len(session.objects) {
+		log.Printf("p11mod DestroyObject: object index invalid: requested %d, object count %d\n", objectIndex, len(session.objects))
+		return pkcs11.Error(pkcs11.CKR_OBJECT_HANDLE_INVALID)
+	}
+
+	object := session.objects[objectIndex]
+
+	return object.Destroy()
 }
 
 func (ll *llBackend) GetObjectSize(sh pkcs11.SessionHandle, oh pkcs11.ObjectHandle) (uint, error) {