From d5ebae0905751cf25c72b9ad1d97c830ee851ae0 Mon Sep 17 00:00:00 2001
From: Tony Arcieri <bascule@gmail.com>
Date: Thu, 4 Jan 2024 20:07:59 -0700
Subject: [PATCH] const-oid: fix `Encoder` size check and off-by-one error

The `Encoder` previously returned `Error::Length` even when there was
one remaining byte in the buffer.

This fixes that error and adds an edge case test.
---
 const-oid/src/encoder.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/const-oid/src/encoder.rs b/const-oid/src/encoder.rs
index 049e60ab2..e4e8a4bff 100644
--- a/const-oid/src/encoder.rs
+++ b/const-oid/src/encoder.rs
@@ -80,7 +80,7 @@ impl<const MAX_SIZE: usize> Encoder<MAX_SIZE> {
                 let nbytes = base128_len(arc);
 
                 // Shouldn't overflow on any 16-bit+ architectures
-                if self.cursor + nbytes + 1 >= ObjectIdentifier::MAX_SIZE {
+                if self.cursor + nbytes + 1 > MAX_SIZE {
                     return Err(Error::Length);
                 }