Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Browse files

Add MD2 cryptohash

the C md2 implementation is a cross from rfc1319 and using the same skeleton as
every other cryptohash.
  • Loading branch information...
commit 778ed6b1546338870480b9964f848c767755c254 1 parent 81412fe
@vincenthz authored
Showing with 283 additions and 0 deletions.
  1. +102 −0 Data/CryptoHash/MD2.hs
  2. +135 −0 cbits/md2.c
  3. +44 −0 cbits/md2.h
  4. +2 −0  cryptohash.cabal
View
102 Data/CryptoHash/MD2.hs
@@ -0,0 +1,102 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
+
+-- |
+-- Module : Data.CryptoHash.MD2
+-- License : BSD-style
+-- Maintainer : Vincent Hanquez <vincent@snarc.org>
+-- Stability : experimental
+-- Portability : unknown
+--
+-- A module containing MD2 bindings
+--
+module Data.CryptoHash.MD2 (
+ Ctx(..),
+
+ -- * Incremental hashing Functions
+ init, -- :: Ctx
+ update, -- :: Ctx -> ByteString -> Ctx
+ finalize, -- :: Ctx -> ByteString
+
+ -- * Single Pass hashing
+ hash, -- :: ByteString -> ByteString
+ hashlazy -- :: ByteString -> ByteString
+ ) where
+
+import Prelude hiding (init)
+import Foreign
+import Foreign.C.String
+import qualified Data.ByteString as B
+import qualified Data.ByteString.Lazy as L
+import Data.ByteString (ByteString)
+import Data.ByteString.Unsafe (unsafeUseAsCStringLen, unsafeIndex)
+import Data.ByteString.Internal (create)
+
+data Ctx = Ctx ByteString
+
+digestSize :: Int
+sizeCtx :: Int
+
+digestSize = 16
+sizeCtx = 96
+
+instance Storable Ctx where
+ sizeOf _ = sizeCtx
+ alignment _ = 16
+ poke ptr (Ctx b) = mapM_ (\i -> poke (ptr `plusPtr` i) (unsafeIndex b i)) [0..(sizeCtx-1)]
+
+ peek ptr = do
+ b <- create sizeCtx (\bptr -> mapM_ (\i -> do
+ f <- peek (ptr `plusPtr` i) :: IO Word8
+ poke (bptr `plusPtr` i) f
+ ) [0..(sizeCtx-1)])
+ return $ Ctx $! b
+
+foreign import ccall unsafe "md2.h md2_init"
+ c_md2_init :: Ptr Ctx -> IO ()
+
+foreign import ccall unsafe "md2.h md2_update"
+ c_md2_update :: Ptr Ctx -> CString -> Word32 -> IO ()
+
+foreign import ccall unsafe "md2.h md2_finalize"
+ c_md2_finalize :: Ptr Ctx -> CString -> IO ()
+
+allocInternal :: (Ptr Ctx -> IO a) -> IO a
+allocInternal = alloca
+
+allocInternalFrom :: Ctx -> (Ptr Ctx -> IO a) -> IO a
+allocInternalFrom ctx f = allocInternal $ \ptr -> (poke ptr ctx >> f ptr)
+
+updateInternalIO :: Ptr Ctx -> ByteString -> IO ()
+updateInternalIO ptr d =
+ unsafeUseAsCStringLen d (\(cs, len) -> c_md2_update ptr cs (fromIntegral len))
+
+finalizeInternalIO :: Ptr Ctx -> IO ByteString
+finalizeInternalIO ptr =
+ allocaBytes digestSize (\cs -> c_md2_finalize ptr cs >> B.packCStringLen (cs, digestSize))
+
+{-# NOINLINE init #-}
+-- | init a context
+init :: Ctx
+init = unsafePerformIO $ allocInternal $ \ptr -> do (c_md2_init ptr >> peek ptr)
+
+{-# NOINLINE update #-}
+-- | update a context with a bytestring
+update :: Ctx -> ByteString -> Ctx
+update ctx d = unsafePerformIO $ allocInternalFrom ctx $ \ptr -> do updateInternalIO ptr d >> peek ptr
+
+{-# NOINLINE finalize #-}
+-- | finalize the context into a digest bytestring
+finalize :: Ctx -> ByteString
+finalize ctx = unsafePerformIO $ allocInternalFrom ctx $ \ptr -> do finalizeInternalIO ptr
+
+{-# NOINLINE hash #-}
+-- | hash a strict bytestring into a digest bytestring
+hash :: ByteString -> ByteString
+hash d = unsafePerformIO $ allocInternal $ \ptr -> do
+ c_md2_init ptr >> updateInternalIO ptr d >> finalizeInternalIO ptr
+
+{-# NOINLINE hashlazy #-}
+-- | hash a lazy bytestring into a digest bytestring
+hashlazy :: L.ByteString -> ByteString
+hashlazy l = unsafePerformIO $ allocInternal $ \ptr -> do
+ c_md2_init ptr >> mapM_ (updateInternalIO ptr) (L.toChunks l) >> finalizeInternalIO ptr
View
135 cbits/md2.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2006-2010 Vincent Hanquez <vincent@snarc.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include "bitfn.h"
+#include "md2.h"
+
+void md2_init(struct md2_ctx *ctx)
+{
+ memset(ctx, 0, sizeof(*ctx));
+ ctx->sz = 0ULL;
+}
+
+static uint8_t S_table[] = {
+ 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36, 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13,
+ 0x62, 0xA7, 0x05, 0xF3, 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C, 0x82, 0xCA,
+ 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16, 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12,
+ 0xBE, 0x4E, 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E, 0xBB, 0x2F, 0xEE, 0x7A,
+ 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2, 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
+ 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E, 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03,
+ 0xFF, 0x19, 0x30, 0xB3, 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56, 0xAA, 0xC6,
+ 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6, 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1,
+ 0x45, 0x9D, 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65, 0xE6, 0x2D, 0xA8, 0x02,
+ 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0, 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
+ 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C, 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26,
+ 0x2C, 0x53, 0x0D, 0x6E, 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81, 0x4D, 0x52,
+ 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA, 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A,
+ 0x78, 0x88, 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE, 0x3B, 0x00, 0x1D, 0x39,
+ 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58, 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
+ 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99, 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
+};
+
+static uint8_t *padding_table[] = {
+ "",
+ "\x1",
+ "\x2\x2",
+ "\x3\x3\x3",
+ "\x4\x4\x4\x4",
+ "\x5\x5\x5\x5\x5",
+ "\x6\x6\x6\x6\x6\x6",
+ "\x7\x7\x7\x7\x7\x7\x7",
+ "\x8\x8\x8\x8\x8\x8\x8\x8",
+ "\x9\x9\x9\x9\x9\x9\x9\x9\x9",
+ "\xa\xa\xa\xa\xa\xa\xa\xa\xa\xa",
+ "\xb\xb\xb\xb\xb\xb\xb\xb\xb\xb\xb",
+ "\xc\xc\xc\xc\xc\xc\xc\xc\xc\xc\xc\xc",
+ "\xd\xd\xd\xd\xd\xd\xd\xd\xd\xd\xd\xd\xd",
+ "\xe\xe\xe\xe\xe\xe\xe\xe\xe\xe\xe\xe\xe\xe",
+ "\xf\xf\xf\xf\xf\xf\xf\xf\xf\xf\xf\xf\xf\xf\xf",
+ "\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10"
+};
+
+static void md2_do_chunk(uint8_t buf[], uint8_t h[], uint8_t cksum[])
+{
+ uint8_t i, j, t;
+ uint8_t x[48];
+
+ memcpy(x, h, 16);
+ memcpy(x+16, buf, 16);
+
+ for (i = 0; i < 16; i++)
+ x[i+32] = h[i] ^ buf[i];
+
+ for (t = i = 0; i < 18; i++) {
+ for (j = 0; j < 48; j++)
+ t = x[j] ^= S_table[t];
+ t = (t + i) & 0xff;
+ }
+
+ memcpy (h, x, 16);
+
+ t = cksum[15];
+ for (i = 0; i < 16; i++)
+ t = cksum[i] ^= S_table[buf[i] ^ t];
+}
+
+void md2_update(struct md2_ctx *ctx, uint8_t *data, uint32_t len)
+{
+ uint32_t index, to_fill;
+
+ index = (uint32_t) (ctx->sz & 0xf);
+ to_fill = 16 - index;
+
+ ctx->sz += len;
+
+ if (index && len >= to_fill) {
+ memcpy(ctx->buf + index, data, to_fill);
+ md2_do_chunk(ctx->buf, ctx->h, ctx->cksum);
+ len -= to_fill;
+ data += to_fill;
+ index = 0;
+ }
+
+ /* process as much 16-block as possible */
+ for (; len >= 16; len -= 16, data += 16)
+ md2_do_chunk(data, ctx->h, ctx->cksum);
+
+ /* append data into buf */
+ if (len)
+ memcpy(ctx->buf + index, data, len);
+}
+
+void md2_finalize(struct md2_ctx *ctx, uint8_t *out)
+{
+ uint32_t index, padlen;
+
+ index = ctx->sz & 0xf;
+ padlen = 16 - index;
+
+ md2_update(ctx, padding_table[padlen], padlen);
+ md2_update(ctx, ctx->cksum, 16);
+ memcpy(out, ctx->h, 16);
+}
View
44 cbits/md2.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2006-2009 Vincent Hanquez <vincent@snarc.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef CRYPTOHASH_MD2_H
+#define CRYPTOHASH_MD2_H
+
+#include <stdint.h>
+
+struct md2_ctx
+{
+ uint64_t sz;
+ uint8_t buf[16];
+ uint8_t h[16];
+ uint8_t cksum[16];
+};
+
+#define MD2_DIGEST_SIZE 16
+#define MD2_CTX_SIZE sizeof(struct md2_ctx)
+
+void md2_init(struct md2_ctx *ctx);
+void md2_update(struct md2_ctx *ctx, uint8_t *data, uint32_t len);
+void md2_finalize(struct md2_ctx *ctx, uint8_t *out);
+
+#endif
View
2  cryptohash.cabal
@@ -16,6 +16,7 @@ Library
Data.CryptoHash.SHA256
Data.CryptoHash.SHA384
Data.CryptoHash.SHA512
+ Data.CryptoHash.MD2
Data.CryptoHash.MD4
Data.CryptoHash.MD5
Data.CryptoHash.RIPEMD160
@@ -23,6 +24,7 @@ Library
C-sources: cbits/sha1.c
cbits/sha256.c
cbits/sha512.c
+ cbits/md2.c
cbits/md4.c
cbits/md5.c
cbits/ripemd.c
Please sign in to comment.
Something went wrong with that request. Please try again.