From 13e78ac0fe36f840ffe4819826409ba8b215f740 Mon Sep 17 00:00:00 2001
From: Brian DeHamer <bdehamer@github.com>
Date: Fri, 8 Sep 2023 09:15:34 -0700
Subject: [PATCH] fix bug in mocked inclusion proof calculation (#737)

Signed-off-by: Brian DeHamer <bdehamer@github.com>
---
 .changeset/slow-weeks-shop.md   | 5 +++++
 packages/mock/src/rekor/tlog.ts | 8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)
 create mode 100644 .changeset/slow-weeks-shop.md

diff --git a/.changeset/slow-weeks-shop.md b/.changeset/slow-weeks-shop.md
new file mode 100644
index 00000000..6a56f507
--- /dev/null
+++ b/.changeset/slow-weeks-shop.md
@@ -0,0 +1,5 @@
+---
+'@sigstore/mock': patch
+---
+
+Fix bug in mocked inclusion proof calculation
diff --git a/packages/mock/src/rekor/tlog.ts b/packages/mock/src/rekor/tlog.ts
index 41bfca9c..5e27a4b8 100644
--- a/packages/mock/src/rekor/tlog.ts
+++ b/packages/mock/src/rekor/tlog.ts
@@ -56,7 +56,7 @@ class TLogImpl implements TLog {
     const logID = crypto.createHash('sha256').update(this.publicKey).digest();
     const logIndex = crypto.randomInt(10_000_000);
     const timestamp = Math.floor(Date.now() / 1000);
-    const body = Buffer.from(canonicalize(proposedEntry)!).toString('base64');
+    const body = Buffer.from(canonicalize(proposedEntry)!);
 
     const entry = { logID, logIndex, timestamp, body };
     const set = this.calculateSET(entry);
@@ -86,13 +86,13 @@ class TLogImpl implements TLog {
     logIndex,
     logID,
   }: {
-    body: string;
+    body: Buffer;
     timestamp: number;
     logIndex: number;
     logID: Buffer;
   }): Buffer {
     const setData = {
-      body: body,
+      body: body.toString('base64'),
       integratedTime: timestamp,
       logIndex: logIndex,
       logID: logID.toString('hex'),
@@ -109,7 +109,7 @@ class TLogImpl implements TLog {
     timestamp,
     logID,
   }: {
-    body: string;
+    body: Buffer;
     timestamp: number;
     logID: Buffer;
   }): InclusionProof {