aboutsummaryrefslogtreecommitdiff
path: root/src/Foreign/Ptr/ConstantTimeEquals.chs
diff options
context:
space:
mode:
authorGravatar Benjamin Barenblat <bbaren@google.com>2018-08-02 17:08:44 -0400
committerGravatar Benjamin Barenblat <bbaren@google.com>2018-08-02 17:08:44 -0400
commit2152e7728db7e0cf86ea23d29a05294af24b6898 (patch)
tree68d29e2afe6a92391350e36ef67c4f7489ed715d /src/Foreign/Ptr/ConstantTimeEquals.chs
parent5214c3f61d3aaaf18baff8020a066cc2160d612d (diff)
Begin cleaning up internal modules
Clarify the division between internal and external modules in the source by consolidating all internal modules except Data.Digest.Internal into a flatter BTLS directory.
Diffstat (limited to 'src/Foreign/Ptr/ConstantTimeEquals.chs')
-rw-r--r--src/Foreign/Ptr/ConstantTimeEquals.chs30
1 files changed, 0 insertions, 30 deletions
diff --git a/src/Foreign/Ptr/ConstantTimeEquals.chs b/src/Foreign/Ptr/ConstantTimeEquals.chs
deleted file mode 100644
index a96fc66..0000000
--- a/src/Foreign/Ptr/ConstantTimeEquals.chs
+++ /dev/null
@@ -1,30 +0,0 @@
--- Copyright 2018 Google LLC
---
--- Licensed under the Apache License, Version 2.0 (the "License"); you may not
--- use this file except in compliance with the License. You may obtain a copy of
--- the License at
---
--- https://www.apache.org/licenses/LICENSE-2.0
---
--- Unless required by applicable law or agreed to in writing, software
--- distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
--- WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
--- License for the specific language governing permissions and limitations under
--- the License.
-
-module Foreign.Ptr.ConstantTimeEquals where
-
-import Foreign (Ptr)
-import Foreign.C.Types
-
-import Foreign.Ptr.Cast (asVoidPtr)
-
-#include <openssl/mem.h>
-
--- | Directly compares two buffers for equality. This operation takes an amount
--- of time dependent on the specified size but independent of either buffer's
--- contents.
-constantTimeEquals :: Ptr a -> Ptr a -> Int -> IO Bool
-constantTimeEquals a b size =
- let size' = fromIntegral size :: CULong in
- (== 0) <$> {#call CRYPTO_memcmp as ^#} (asVoidPtr a) (asVoidPtr b) size'