Hash: Speed up initialization by removing pure-Python wrappershash-speedup-wip

The pure Python wrappers around Crypto.Hash.* were convenient, but they
slowed down hash initialization by 4-7x.

There is a speed trade-off here: The MD5 and SHA1 objects are just
wrapped hashlib objects (or old-style md5/sha objects).  To maintain API
compatibility with the rest of PyCrypto, we still have to wrap them, so
they're slower to initialize than the rest of the hash functions.  If
hashlib ever adds a .new() method, we will automatically use hashlib
directly and gain the initialization speed-up.

1 files changed, 17 insertions, 12 deletions

diff --git a/src/MD2.c b/src/MD2.c
index dadb999..043bcc8 100644
--- a/src/MD2.c
+++ b/src/MD2.c
@@ -31,21 +31,26 @@
 #include <string.h>
 #include "pycrypto_compat.h"
 
-#define MODULE_NAME _MD2
-#define ALGORITHM_NAME "MD2"
+#define MODULE_NAME MD2
 #define DIGEST_SIZE 16
 #define BLOCK_SIZE 64
 
-/**
- * id-md2      OBJECT IDENTIFIER ::= {
- * 			iso(1) member-body(2) us(840) rsadsi(113549)
- * 			digestAlgorithm(2) 2
- * 			}
- */
-static const char md2_oid[] = { 0x06, 0x08, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x02 };
-
-#define DER_OID 		((void*)&md2_oid)
-#define DER_OID_SIZE		(sizeof md2_oid)
+static char MODULE__doc__[] =
+    "MD2 cryptographic hash algorithm.\n"
+    "\n"
+    "MD2 is specified in RFC1319_ and it produces the 128 bit digest of a message.\n"
+    "\n"
+    "    >>> from Crypto.Hash import MD2\n"
+    "    >>>\n"
+    "    >>> h = MD2.new()\n"
+    "    >>> h.update(b'Hello')\n"
+    "    >>> print h.hexdigest()\n"
+    "\n"
+    "MD2 stand for Message Digest version 2, and it was invented by Rivest in 1989.\n"
+    "\n"
+    "This algorithm is both slow and insecure. Do not use it for new designs.\n"
+    "\n"
+    ".. _RFC1319: http://tools.ietf.org/html/rfc1319\n";
 
 typedef unsigned char U8;
 typedef unsigned int U32;