removing (outdated) drawterm

drawterm is much better maintained by russ cox,
so removing this outdated copy.

for a more recent version, go to:

http://swtch.com/drawterm/

1 files changed, 0 insertions, 46 deletions

diff --git a/sys/src/cmd/unix/drawterm/libsec/dsaverify.c b/sys/src/cmd/unix/drawterm/libsec/dsaverify.c
deleted file mode 100644
index 23cee501f..000000000
--- a/sys/src/cmd/unix/drawterm/libsec/dsaverify.c
+++ /dev/null
@@ -1,46 +0,0 @@
-#include "os.h"
-#include <mp.h>
-#include <libsec.h>
-
-int
-dsaverify(DSApub *pub, DSAsig *sig, mpint *m)
-{
-	int rv = -1;
-	mpint *u1, *u2, *v, *sinv;
-
-	if(sig->r->sign < 0 || mpcmp(sig->r, pub->q) >= 0)
-		return rv;
-	if(sig->s->sign < 0 || mpcmp(sig->s, pub->q) >= 0)
-		return rv;
-	u1 = mpnew(0);
-	u2 = mpnew(0);
-	v = mpnew(0);
-	sinv = mpnew(0);
-
-	// find (s**-1) mod q, make sure it exists
-	mpextendedgcd(sig->s, pub->q, u1, sinv, v);
-	if(mpcmp(u1, mpone) != 0)
-		goto out;
-
-	// u1 = (sinv * m) mod q, u2 = (r * sinv) mod q
-	mpmul(sinv, m, u1);
-	mpmod(u1, pub->q, u1);
-	mpmul(sig->r, sinv, u2);
-	mpmod(u2, pub->q, u2);
-
-	// v = (((alpha**u1)*(key**u2)) mod p) mod q
-	mpexp(pub->alpha, u1, pub->p, sinv);
-	mpexp(pub->key, u2, pub->p, v);
-	mpmul(sinv, v, v);
-	mpmod(v, pub->p, v);
-	mpmod(v, pub->q, v);
-
-	if(mpcmp(v, sig->r) == 0)
-		rv = 0;
-out:
-	mpfree(v);
-	mpfree(u1);
-	mpfree(u2);
-	mpfree(sinv);
-	return rv;
-}