From 9c45d9ad13fdf439d44d7443ae75da15ea0223ed Mon Sep 17 00:00:00 2001
From: Sam Varshavchik
Date: Mon, 19 Aug 2013 16:39:41 -0400
Subject: Initial checkin

Imported from subversion report, converted to git. Updated all paths in
scripts and makefiles, reflecting the new directory hierarchy.
---
 libhmac/hmac.c | 150 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 libhmac/hmac.c

(limited to 'libhmac/hmac.c')

diff --git a/libhmac/hmac.c b/libhmac/hmac.c
new file mode 100644
index 0000000..b624fa9
--- /dev/null
+++ b/libhmac/hmac.c
@@ -0,0 +1,150 @@
+/*
+** Copyright 1998 - 1999 Double Precision, Inc.
+** See COPYING for distribution information.
+*/
+
+#if	HAVE_CONFIG_H
+#include	"config.h"
+#endif
+
+#include	"hmac.h"
+
+
+struct hmac_hashinfo *hmac_list[]= {HMAC_LIST};
+
+struct hhki {
+	const struct hmac_hashinfo *hh;
+	const char *k;
+        size_t kl;
+	unsigned char *kxopad;
+	unsigned char *kxipad;
+
+	void *context;
+	} ;
+
+static void dohashkey(unsigned char *, void *);
+static void docalcc(void *, void *);
+
+void hmac_hashkey(const struct hmac_hashinfo *hh, const char *k,
+        size_t kl, unsigned char *kxopad, unsigned char *kxipad)
+{
+struct hhki i;
+
+	i.hh=hh;
+	i.k=k;
+	i.kl=kl;
+	i.kxopad=kxopad;
+	i.kxipad=kxipad;
+
+	(*hh->hh_allocacontext)( docalcc, (void *)&i );
+}
+
+static void dokeycalc(struct hhki *);
+
+static void docalcc(void *c, void *v)
+{
+struct hhki *i=(struct hhki *)v;
+
+	i->context=c;
+
+	if (i->kl > i->hh->hh_B)
+		(*i->hh->hh_allocaval)(dohashkey, (void *)i);
+	else
+		dokeycalc( i );
+}
+
+static void dohashkey(unsigned char *keybuf, void *v)
+{
+struct hhki *i=(struct hhki *)v;
+
+	(*i->hh->hh_init)(i->context);
+	(*i->hh->hh_hash)(i->context, i->k, i->kl);
+	(*i->hh->hh_endhash)(i->context, i->kl);
+	(*i->hh->hh_getdigest)(i->context, keybuf);
+	i->k=(char *)keybuf;
+	i->kl=i->hh->hh_L;
+	dokeycalc(i);
+}
+
+static void dokeycalc(struct hhki *i)
+{
+char	buf[64];	/* Random guess :-) */
+unsigned n;
+unsigned l;
+
+	(*i->hh->hh_init)(i->context);
+	n=0;
+	for (l=0; l<i->hh->hh_B; l++)
+	{
+		buf[n] = ( l < i->kl ? i->k[l]:0) ^ 0x5C;
+		if ( ++n >= sizeof(buf))
+		{
+			(*i->hh->hh_hash)(i->context, buf, sizeof(buf));
+			n=0;
+		}
+	}
+	if (n)
+		(*i->hh->hh_hash)(i->context, buf, n);
+	(*i->hh->hh_getdigest)(i->context, i->kxopad);
+
+	(*i->hh->hh_init)(i->context);
+	n=0;
+	for (l=0; l<i->hh->hh_B; l++)
+	{
+		buf[n] = ( l < i->kl ? i->k[l]:0) ^ 0x36;
+		if ( ++n >= sizeof(buf))
+		{
+			(*i->hh->hh_hash)(i->context, buf, sizeof(buf));
+			n=0;
+		}
+	}
+	if (n)
+		(*i->hh->hh_hash)(i->context, buf, n);
+	(*i->hh->hh_getdigest)(i->context, i->kxipad);
+}
+
+struct hhko {
+	const struct hmac_hashinfo *hh;
+	const char *t;
+        size_t tl;
+	const unsigned char *kxopad;
+	const unsigned char *kxipad;
+	unsigned char *hash;
+	} ;
+
+static void docalch(void *, void *);
+
+void hmac_hashtext (
+        const struct hmac_hashinfo *hh,
+        const char *t,
+        size_t tl,
+        const unsigned char *kxopad,
+        const unsigned char *kxipad,
+        unsigned char *hash)
+{
+struct hhko o;
+
+	o.hh=hh;
+	o.t=t;
+	o.tl=tl;
+	o.kxopad=kxopad;
+	o.kxipad=kxipad;
+	o.hash=hash;
+
+	(*hh->hh_allocacontext)( docalch, (void *)&o );
+}
+
+static void docalch(void *c, void *v)
+{
+struct hhko *o=(struct hhko *)v;
+
+	(o->hh->hh_setdigest)(c, o->kxipad);
+	(o->hh->hh_hash)(c, o->t, o->tl);
+	(o->hh->hh_endhash)(c, o->tl+o->hh->hh_B);
+	(o->hh->hh_getdigest)(c, o->hash);
+
+	(o->hh->hh_setdigest)(c, o->kxopad);
+	(o->hh->hh_hash)(c, o->hash, o->hh->hh_L);
+	(o->hh->hh_endhash)(c, o->hh->hh_L + o->hh->hh_B);
+	(o->hh->hh_getdigest)(c, o->hash);
+}
-- 
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