1 files changed, 9 insertions, 1 deletions
diff --git a/ext/crypto/import_key.rs b/ext/crypto/import_key.rs
index 015ee41d5..225950aa7 100644
--- a/ext/crypto/import_key.rs
+++ b/ext/crypto/import_key.rs
@@ -637,7 +637,15 @@ fn decode_b64url_to_field_bytes<C: elliptic_curve::Curve>(
   jwt_b64_int_or_err!(val, b64, "invalid b64 coordinate");
 
   let mut bytes = elliptic_curve::FieldBytes::<C>::default();
-  let val = val.as_bytes();
+  let original_bytes = val.as_bytes();
+  let mut new_bytes: Vec<u8> = vec![];
+  if original_bytes.len() < bytes.len() {
+    new_bytes = vec![0; bytes.len() - original_bytes.len()];
+  }
+  new_bytes.extend_from_slice(original_bytes);
+
+  let val = new_bytes.as_slice();
+
   if val.len() != bytes.len() {
     return Err(data_error("invalid b64 coordinate"));
   }