diff options
author | Benjamin Barenblat <bbaren@google.com> | 2018-08-02 17:08:44 -0400 |
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committer | Benjamin Barenblat <bbaren@google.com> | 2018-08-02 17:08:44 -0400 |
commit | 2152e7728db7e0cf86ea23d29a05294af24b6898 (patch) | |
tree | 68d29e2afe6a92391350e36ef67c4f7489ed715d /src/Foreign/Ptr/ConstantTimeEquals.chs | |
parent | 5214c3f61d3aaaf18baff8020a066cc2160d612d (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.chs | 30 |
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' |