Data.SecureMem

securemem-0.1.9: abstraction to an auto scrubbing and const time eq, memory chunk.

License | BSD-style
Maintainer | Vincent Hanquez <vincent@snarc.org>
Stability | Stable
Portability | GHC
Safe Haskell | None
Language | Haskell98

Data.SecureMem

Contents

- Allocation and early termination
- Pointers manipulation
- convertion

Description

Synopsis

- data SecureMem
- secureMemGetSize :: SecureMem -> Int
- secureMemCopy :: SecureMem -> IO SecureMem
- class ToSecureMem a where
- allocateSecureMem :: Int -> IO SecureMem
- createSecureMem :: Int -> (Ptr Word8 -> IO ()) -> IO SecureMem
- unsafeCreateSecureMem :: Int -> (Ptr Word8 -> IO ()) -> SecureMem
- finalizeSecureMem :: SecureMem -> IO ()
- withSecureMemPtr :: SecureMem -> (Ptr Word8 -> IO b) -> IO b
- withSecureMemPtrSz :: SecureMem -> (Int -> Ptr Word8 -> IO b) -> IO b
- withSecureMemCopy :: SecureMem -> (Ptr Word8 -> IO ()) -> IO SecureMem
- secureMemFromByteString :: ByteString -> SecureMem
- secureMemFromByteable :: Byteable b => b -> SecureMem

# Documentation

data SecureMem #

SecureMem is a memory chunk which have the properties of:

- Being scrubbed after its goes out of scope.
- A Show instance that doesn't actually show any content
- A Eq instance that is constant time

Instances

Eq SecureMem # |
Methods (==) :: SecureMem -> SecureMem -> Bool # (/=) :: SecureMem -> SecureMem -> Bool #
Show SecureMem # |
Methods showsPrec :: Int -> SecureMem -> ShowS # show :: SecureMem -> String # showList :: [SecureMem] -> ShowS #
Monoid SecureMem # |
Methods mempty :: SecureMem # mappend :: SecureMem -> SecureMem -> SecureMem # mconcat :: [SecureMem] -> SecureMem #
Byteable SecureMem # |
Methods toBytes :: SecureMem -> ByteString # byteableLength :: SecureMem -> Int # withBytePtr :: SecureMem -> (Ptr Word8 -> IO b) -> IO b #
ToSecureMem SecureMem # |
Methods toSecureMem :: SecureMem -> SecureMem #

secureMemGetSize :: SecureMem -> Int #

secureMemCopy :: SecureMem -> IO SecureMem #

class ToSecureMem a where #

Types that can be converted to a secure mem object.

Minimal complete definition

toSecureMem

Methods

toSecureMem :: a -> SecureMem #

Instances

ToSecureMem ByteString # |
Methods toSecureMem :: ByteString -> SecureMem #
ToSecureMem SecureMem # |
Methods toSecureMem :: SecureMem -> SecureMem #

# Allocation and early termination

allocateSecureMem :: Int -> IO SecureMem #

Allocate a new SecureMem

The memory is allocated on the haskell heap, and will be scrubed before being released.

createSecureMem :: Int -> (Ptr Word8 -> IO ()) -> IO SecureMem #

Create a new secure mem and running an initializer function

unsafeCreateSecureMem :: Int -> (Ptr Word8 -> IO ()) -> SecureMem #

Create a new secure mem using inline perform IO to create a pure result.

finalizeSecureMem :: SecureMem -> IO () #

Finalize a SecureMem early

# Pointers manipulation

withSecureMemPtr :: SecureMem -> (Ptr Word8 -> IO b) -> IO b #

This is a way to look at the pointer living inside a foreign object. This function takes a function which is applied to that pointer. The resulting IO action is then executed

this is similary to withForeignPtr for a ForeignPtr

withSecureMemPtrSz :: SecureMem -> (Int -> Ptr Word8 -> IO b) -> IO b #

similar to withSecureMem but also include the size of the pointed memory.

withSecureMemCopy :: SecureMem -> (Ptr Word8 -> IO ()) -> IO SecureMem #

# convertion

secureMemFromByteString :: ByteString -> SecureMem #

Create a SecureMem from a bytestring

secureMemFromByteable :: Byteable b => b -> SecureMem #

Create a SecureMem from any byteable object