From 7dcd284c6e586aa0658016902be7eb612dacb7cb Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sun, 26 Apr 2020 18:19:57 -0400
Subject: Remove dead constant time code (#5239)

---
 setup.py                                 |  1 -
 src/_cffi_src/build_constant_time.py     | 27 ---------------------------
 src/_cffi_src/hazmat_src/constant_time.c | 22 ----------------------
 src/_cffi_src/hazmat_src/constant_time.h |  6 ------
 4 files changed, 56 deletions(-)
 delete mode 100644 src/_cffi_src/build_constant_time.py
 delete mode 100644 src/_cffi_src/hazmat_src/constant_time.c
 delete mode 100644 src/_cffi_src/hazmat_src/constant_time.h

diff --git a/setup.py b/setup.py
index a5bbfa1e..e82464aa 100644
--- a/setup.py
+++ b/setup.py
@@ -148,7 +148,6 @@ def keywords_with_side_effects(argv):
     else:
         cffi_modules = [
             "src/_cffi_src/build_openssl.py:ffi",
-            "src/_cffi_src/build_constant_time.py:ffi",
             "src/_cffi_src/build_padding.py:ffi",
         ]
 
diff --git a/src/_cffi_src/build_constant_time.py b/src/_cffi_src/build_constant_time.py
deleted file mode 100644
index 7a11f7b5..00000000
--- a/src/_cffi_src/build_constant_time.py
+++ /dev/null
@@ -1,27 +0,0 @@
-# This file is dual licensed under the terms of the Apache License, Version
-# 2.0, and the BSD License. See the LICENSE file in the root of this repository
-# for complete details.
-
-from __future__ import absolute_import, division, print_function
-
-import os
-
-from _cffi_src.utils import build_ffi, compiler_type, extra_link_args
-
-
-with open(os.path.join(
-    os.path.dirname(__file__), "hazmat_src/constant_time.h"
-)) as f:
-    types = f.read()
-
-with open(os.path.join(
-    os.path.dirname(__file__), "hazmat_src/constant_time.c"
-)) as f:
-    functions = f.read()
-
-ffi = build_ffi(
-    module_name="_constant_time",
-    cdef_source=types,
-    verify_source=functions,
-    extra_link_args=extra_link_args(compiler_type()),
-)
diff --git a/src/_cffi_src/hazmat_src/constant_time.c b/src/_cffi_src/hazmat_src/constant_time.c
deleted file mode 100644
index 0a48fe83..00000000
--- a/src/_cffi_src/hazmat_src/constant_time.c
+++ /dev/null
@@ -1,22 +0,0 @@
-// This file is dual licensed under the terms of the Apache License, Version
-// 2.0, and the BSD License. See the LICENSE file in the root of this
-// repository for complete details.
-
-uint8_t Cryptography_constant_time_bytes_eq(uint8_t *a, size_t len_a,
-                                            uint8_t *b, size_t len_b) {
-    size_t i = 0;
-    uint8_t mismatch = 0;
-    if (len_a != len_b) {
-        return 0;
-    }
-    for (i = 0; i < len_a; i++) {
-        mismatch |= a[i] ^ b[i];
-    }
-
-    /* Make sure any bits set are copied to the lowest bit */
-    mismatch |= mismatch >> 4;
-    mismatch |= mismatch >> 2;
-    mismatch |= mismatch >> 1;
-    /* Now check the low bit to see if it's set */
-    return (mismatch & 1) == 0;
-}
diff --git a/src/_cffi_src/hazmat_src/constant_time.h b/src/_cffi_src/hazmat_src/constant_time.h
deleted file mode 100644
index 593479f6..00000000
--- a/src/_cffi_src/hazmat_src/constant_time.h
+++ /dev/null
@@ -1,6 +0,0 @@
-// This file is dual licensed under the terms of the Apache License, Version
-// 2.0, and the BSD License. See the LICENSE file in the root of this
-// repository for complete details.
-
-uint8_t Cryptography_constant_time_bytes_eq(uint8_t *, size_t, uint8_t *,
-                                            size_t);
-- 
cgit v1.2.3