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# md5c.tcl -
#
# Wrapper for RSA's Message Digest in C
#
# Written by Jean-Claude Wippler <jcw@equi4.com>
#
# $Id: md5c.tcl,v 1.5 2009/05/06 22:46:10 patthoyts Exp $
package require critcl; # needs critcl
# @sak notprovided md5c
package provide md5c 0.12; #
critcl::cheaders md5.h; # The RSA header file
critcl::csources md5.c; # The RSA MD5 implementation.
namespace eval ::md5 {
critcl::ccode {
#include <string.h>
#include "md5.h"
#include <assert.h>
static
Tcl_ObjType md5_type; /* fast internal access representation */
static void
md5_free_rep(Tcl_Obj *obj)
{
MD5_CTX *mp = (MD5_CTX *) obj->internalRep.otherValuePtr;
Tcl_Free((char*)mp);
}
static void
md5_dup_rep(Tcl_Obj *obj, Tcl_Obj *dup)
{
MD5_CTX *mp = (MD5_CTX *) obj->internalRep.otherValuePtr;
dup->internalRep.otherValuePtr = Tcl_Alloc(sizeof *mp);
memcpy(dup->internalRep.otherValuePtr, mp, sizeof *mp);
dup->typePtr = &md5_type;
}
static void
md5_string_rep(Tcl_Obj *obj)
{
unsigned char buf[16];
Tcl_Obj *temp;
char *str;
MD5_CTX dup = *(MD5_CTX *) obj->internalRep.otherValuePtr;
MD5Final(buf, &dup);
/* convert via a byte array to properly handle null bytes */
temp = Tcl_NewByteArrayObj(buf, sizeof buf);
Tcl_IncrRefCount(temp);
str = Tcl_GetStringFromObj(temp, &obj->length);
obj->bytes = Tcl_Alloc(obj->length + 1);
memcpy(obj->bytes, str, obj->length + 1);
Tcl_DecrRefCount(temp);
}
static int
md5_from_any(Tcl_Interp* ip, Tcl_Obj* obj)
{
assert(0);
return TCL_ERROR;
}
static
Tcl_ObjType md5_type = {
"md5c", md5_free_rep, md5_dup_rep, md5_string_rep, md5_from_any
};
}
critcl::ccommand md5c {dummy ip objc objv} {
MD5_CTX *mp;
unsigned char *data;
int size;
Tcl_Obj *obj;
if (objc < 2 || objc > 3) {
Tcl_WrongNumArgs(ip, 1, objv, "data ?context?");
return TCL_ERROR;
}
if (objc == 3) {
if (objv[2]->typePtr != &md5_type && md5_from_any(ip, objv[2]) != TCL_OK) {
return TCL_ERROR;
}
obj = objv[2];
if (Tcl_IsShared(obj)) {
obj = Tcl_DuplicateObj(obj);
}
} else {
mp = (MD5_CTX *)Tcl_Alloc(sizeof *mp);
MD5Init(mp);
obj = Tcl_NewObj();
Tcl_InvalidateStringRep(obj);
obj->internalRep.otherValuePtr = mp;
obj->typePtr = &md5_type;
}
mp = (MD5_CTX *) obj->internalRep.otherValuePtr;
data = Tcl_GetByteArrayFromObj(objv[1], &size);
MD5Update(mp, data, size);
Tcl_SetObjResult(ip, obj);
return TCL_OK;
}
}
if {[info exists pkgtest] && $pkgtest} {
proc md5c_try {} {
foreach {msg expected} {
""
"d41d8cd98f00b204e9800998ecf8427e"
"a"
"0cc175b9c0f1b6a831c399e269772661"
"abc"
"900150983cd24fb0d6963f7d28e17f72"
"message digest"
"f96b697d7cb7938d525a2f31aaf161d0"
"abcdefghijklmnopqrstuvwxyz"
"c3fcd3d76192e4007dfb496cca67e13b"
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
"d174ab98d277d9f5a5611c2c9f419d9f"
"12345678901234567890123456789012345678901234567890123456789012345678901234567890"
"57edf4a22be3c955ac49da2e2107b67a"
} {
puts "testing: ::md5::md5c \"$msg\""
binary scan [::md5::md5c $msg] H* computed
puts "computed: $computed"
if {0 != [string compare $computed $expected]} {
puts "expected: $expected"
puts "FAILED"
}
}
foreach len {10 50 100 500 1000 5000 10000} {
set blanks [format %$len.0s ""]
puts "input length $len: [time {md5c $blanks} 1000]"
}
}
md5c_try
}
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