Date: Thu, 7 Sep 2000 23:16:42 -0400 From: Mathew KANNER <mat@cs.mcgill.ca> To: freebsd-hackers@freebsd.org Subject: md5 in boot loader Message-ID: <20000907231642.B25604@cs.mcgill.ca>
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Hello,
What about md5 in the boot loader. I've included a patch to
src/sys/boot/ficl/words.c No doubt with lots of little errors. I
added this after concerns while working on PXE booting.
I'm looking for a sense of direction... Is using MD5 better
than just a clear text password or am I wasting my time adding a
roll-bar to a little red wagon?
--Mat
bash-2.03# ./testmain
ficl Version 2.03
Sep 7 2000
32 allocate drop dup s" asd" rot md5 32 cr type cr
7815696ecbf1c96e6894b779456d330e
ok>
bash-2.03# md5 -s "asd"
MD5 ("asd") = 7815696ecbf1c96e6894b779456d330e
bash-2.03#
--- words.c Mon Jun 12 12:46:28 2000
+++ words-md5.c Thu Sep 7 23:01:35 2000
@@ -17,6 +17,7 @@
#else
#include <stand.h>
#endif
+#include <md5.h>
#include <string.h>
#include "ficl.h"
#include "math64.h"
@@ -1207,7 +1208,33 @@
return;
}
-
+/*
+** md5 ( s-addr slen d-addr -- )
+** calculate md5 hash of s-addr, stores in d-addr which must be at least
+** 32 bytes longs.
+*/
+static void md5(FICL_VM *pVM)
+{
+ STRINGINFO si2;
+ STRINGINFO si1;
+ MD5_CTX ctx;
+ static const char hex[]="0123456789abcdef";
+ unsigned char final[16];
+ int i;
+
+ SI_SETPTR(si1, stackPopPtr(pVM->pStack));
+ SI_SETLEN(si2, stackPopUNS(pVM->pStack));
+ SI_SETPTR(si2, stackPopPtr(pVM->pStack));
+ MD5Init(&ctx);
+ MD5Update(&ctx, si2.cp, si2.count);
+ MD5Final(final,&ctx);
+ for(i=0; i<16; i++) {
+ si1.cp[i+i] = hex[final[i] >> 4];
+ si1.cp[i+i+1] = hex[final[i] & 0x0f];
+ final[i]=0;
+ }
+ return;
+}
/**************************************************************************
i n t e r p r e t
** This is the "user interface" of a Forth. It does the following:
@@ -4979,6 +5006,7 @@
dictAppendWord(dp, "forget-wid",forgetWid, FW_DEFAULT);
dictAppendWord(dp, "hash", hash, FW_DEFAULT);
dictAppendWord(dp, "number?", ficlIsNum, FW_DEFAULT);
+ dictAppendWord(dp, "md5", md5, FW_DEFAULT);
dictAppendWord(dp, "parse-word",parseNoCopy, FW_DEFAULT);
dictAppendWord(dp, "sliteral", sLiteralCoIm, FW_COMPIMMED); /* STRING */
dictAppendWord(dp, "wid-set-super",
--
Mathew Kanner <mat@CS.McGill.CA>, SOCS McGill University
Obtuse quote: He [not me] understands: "This field of perception
is void of perception of man." -- The Quintessence of Buddhism
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