From 6632f6a771ce29c72ad67dc4a67d435bc97e26c0 Mon Sep 17 00:00:00 2001
From: Kevin Lewi <klewi@fb.com>
Date: Wed, 29 Sep 2021 18:11:50 -0700
Subject: [PATCH] Fixing p256 to_bytes() bug (#16)

---
 src/group/p256.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/group/p256.rs b/src/group/p256.rs
index eb78f03..3740d36 100644
--- a/src/group/p256.rs
+++ b/src/group/p256.rs
@@ -335,7 +335,10 @@ fn hash_to_curve_simple_swu<N: ArrayLength<u8>>(
         }
 
         fn to_bytes<N: ArrayLength<u8>>(&self) -> GenericArray<u8, N> {
-            GenericArray::clone_from_slice(&self.number.mod_floor(self.f.0).to_bytes_be().1)
+            let val = self.number.mod_floor(self.f.0).to_bytes_be().1;
+            let mut bytes = alloc::vec![0u8; 32 - val.len()];
+            bytes.extend_from_slice(&val);
+            GenericArray::clone_from_slice(&bytes)
         }
     }