From 07d2c115d3f22ff5331ef398ad0ce7a0d94b0375 Mon Sep 17 00:00:00 2001
From: tedu <tedu@openbsd.org>
Date: Sun, 28 May 2017 21:59:56 +0000
Subject: [PATCH] when copying curvy files from ssh, an extra one snuck in.
 signify doesn't do any kex stuff and doesn't need scalarmult.

---
 distrib/special/signify/Makefile       |   4 +-
 usr.bin/signify/Makefile               |   4 +-
 usr.bin/signify/smult_curve25519_ref.c | 265 -------------------------
 3 files changed, 4 insertions(+), 269 deletions(-)
 delete mode 100644 usr.bin/signify/smult_curve25519_ref.c

diff --git a/distrib/special/signify/Makefile b/distrib/special/signify/Makefile
index 46e3ad38f13..5fb73cc6077 100644
--- a/distrib/special/signify/Makefile
+++ b/distrib/special/signify/Makefile
@@ -1,10 +1,10 @@
-#	$OpenBSD: Makefile,v 1.3 2016/09/11 03:21:31 deraadt Exp $
+#	$OpenBSD: Makefile,v 1.4 2017/05/28 21:59:56 tedu Exp $
 
 .PATH: ${.CURDIR}/../../../usr.bin/signify
 
 SRCS=	signify.c
 SRCS+=	zsig.c
-SRCS+=	fe25519.c sc25519.c smult_curve25519_ref.c
+SRCS+=	fe25519.c sc25519.c
 SRCS+=	mod_ed25519.c mod_ge25519.c
 SRCS+=	crypto_api.c
 
diff --git a/usr.bin/signify/Makefile b/usr.bin/signify/Makefile
index 161c43de33a..de945715d4c 100644
--- a/usr.bin/signify/Makefile
+++ b/usr.bin/signify/Makefile
@@ -1,8 +1,8 @@
-#	$OpenBSD: Makefile,v 1.11 2016/09/02 16:10:56 espie Exp $
+#	$OpenBSD: Makefile,v 1.12 2017/05/28 21:59:56 tedu Exp $
 
 SRCS=	signify.c
 SRCS+=	zsig.c
-SRCS+=	fe25519.c sc25519.c smult_curve25519_ref.c
+SRCS+=	fe25519.c sc25519.c
 SRCS+=	mod_ed25519.c mod_ge25519.c
 SRCS+=	crypto_api.c
 
diff --git a/usr.bin/signify/smult_curve25519_ref.c b/usr.bin/signify/smult_curve25519_ref.c
deleted file mode 100644
index 0ed7ffaa311..00000000000
--- a/usr.bin/signify/smult_curve25519_ref.c
+++ /dev/null
@@ -1,265 +0,0 @@
-/* $OpenBSD: smult_curve25519_ref.c,v 1.1 2014/07/22 00:41:19 deraadt Exp $ */
-/*
-version 20081011
-Matthew Dempsky
-Public domain.
-Derived from public domain code by D. J. Bernstein.
-*/
-
-int crypto_scalarmult_curve25519(unsigned char *, const unsigned char *, const unsigned char *);
-
-static void add(unsigned int out[32],const unsigned int a[32],const unsigned int b[32])
-{
-  unsigned int j;
-  unsigned int u;
-  u = 0;
-  for (j = 0;j < 31;++j) { u += a[j] + b[j]; out[j] = u & 255; u >>= 8; }
-  u += a[31] + b[31]; out[31] = u;
-}
-
-static void sub(unsigned int out[32],const unsigned int a[32],const unsigned int b[32])
-{
-  unsigned int j;
-  unsigned int u;
-  u = 218;
-  for (j = 0;j < 31;++j) {
-    u += a[j] + 65280 - b[j];
-    out[j] = u & 255;
-    u >>= 8;
-  }
-  u += a[31] - b[31];
-  out[31] = u;
-}
-
-static void squeeze(unsigned int a[32])
-{
-  unsigned int j;
-  unsigned int u;
-  u = 0;
-  for (j = 0;j < 31;++j) { u += a[j]; a[j] = u & 255; u >>= 8; }
-  u += a[31]; a[31] = u & 127;
-  u = 19 * (u >> 7);
-  for (j = 0;j < 31;++j) { u += a[j]; a[j] = u & 255; u >>= 8; }
-  u += a[31]; a[31] = u;
-}
-
-static const unsigned int minusp[32] = {
- 19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128
-} ;
-
-static void freeze(unsigned int a[32])
-{
-  unsigned int aorig[32];
-  unsigned int j;
-  unsigned int negative;
-
-  for (j = 0;j < 32;++j) aorig[j] = a[j];
-  add(a,a,minusp);
-  negative = -((a[31] >> 7) & 1);
-  for (j = 0;j < 32;++j) a[j] ^= negative & (aorig[j] ^ a[j]);
-}
-
-static void mult(unsigned int out[32],const unsigned int a[32],const unsigned int b[32])
-{
-  unsigned int i;
-  unsigned int j;
-  unsigned int u;
-
-  for (i = 0;i < 32;++i) {
-    u = 0;
-    for (j = 0;j <= i;++j) u += a[j] * b[i - j];
-    for (j = i + 1;j < 32;++j) u += 38 * a[j] * b[i + 32 - j];
-    out[i] = u;
-  }
-  squeeze(out);
-}
-
-static void mult121665(unsigned int out[32],const unsigned int a[32])
-{
-  unsigned int j;
-  unsigned int u;
-
-  u = 0;
-  for (j = 0;j < 31;++j) { u += 121665 * a[j]; out[j] = u & 255; u >>= 8; }
-  u += 121665 * a[31]; out[31] = u & 127;
-  u = 19 * (u >> 7);
-  for (j = 0;j < 31;++j) { u += out[j]; out[j] = u & 255; u >>= 8; }
-  u += out[j]; out[j] = u;
-}
-
-static void square(unsigned int out[32],const unsigned int a[32])
-{
-  unsigned int i;
-  unsigned int j;
-  unsigned int u;
-
-  for (i = 0;i < 32;++i) {
-    u = 0;
-    for (j = 0;j < i - j;++j) u += a[j] * a[i - j];
-    for (j = i + 1;j < i + 32 - j;++j) u += 38 * a[j] * a[i + 32 - j];
-    u *= 2;
-    if ((i & 1) == 0) {
-      u += a[i / 2] * a[i / 2];
-      u += 38 * a[i / 2 + 16] * a[i / 2 + 16];
-    }
-    out[i] = u;
-  }
-  squeeze(out);
-}
-
-static void select(unsigned int p[64],unsigned int q[64],const unsigned int r[64],const unsigned int s[64],unsigned int b)
-{
-  unsigned int j;
-  unsigned int t;
-  unsigned int bminus1;
-
-  bminus1 = b - 1;
-  for (j = 0;j < 64;++j) {
-    t = bminus1 & (r[j] ^ s[j]);
-    p[j] = s[j] ^ t;
-    q[j] = r[j] ^ t;
-  }
-}
-
-static void mainloop(unsigned int work[64],const unsigned char e[32])
-{
-  unsigned int xzm1[64];
-  unsigned int xzm[64];
-  unsigned int xzmb[64];
-  unsigned int xzm1b[64];
-  unsigned int xznb[64];
-  unsigned int xzn1b[64];
-  unsigned int a0[64];
-  unsigned int a1[64];
-  unsigned int b0[64];
-  unsigned int b1[64];
-  unsigned int c1[64];
-  unsigned int r[32];
-  unsigned int s[32];
-  unsigned int t[32];
-  unsigned int u[32];
-  unsigned int j;
-  unsigned int b;
-  int pos;
-
-  for (j = 0;j < 32;++j) xzm1[j] = work[j];
-  xzm1[32] = 1;
-  for (j = 33;j < 64;++j) xzm1[j] = 0;
-
-  xzm[0] = 1;
-  for (j = 1;j < 64;++j) xzm[j] = 0;
-
-  for (pos = 254;pos >= 0;--pos) {
-    b = e[pos / 8] >> (pos & 7);
-    b &= 1;
-    select(xzmb,xzm1b,xzm,xzm1,b);
-    add(a0,xzmb,xzmb + 32);
-    sub(a0 + 32,xzmb,xzmb + 32);
-    add(a1,xzm1b,xzm1b + 32);
-    sub(a1 + 32,xzm1b,xzm1b + 32);
-    square(b0,a0);
-    square(b0 + 32,a0 + 32);
-    mult(b1,a1,a0 + 32);
-    mult(b1 + 32,a1 + 32,a0);
-    add(c1,b1,b1 + 32);
-    sub(c1 + 32,b1,b1 + 32);
-    square(r,c1 + 32);
-    sub(s,b0,b0 + 32);
-    mult121665(t,s);
-    add(u,t,b0);
-    mult(xznb,b0,b0 + 32);
-    mult(xznb + 32,s,u);
-    square(xzn1b,c1);
-    mult(xzn1b + 32,r,work);
-    select(xzm,xzm1,xznb,xzn1b,b);
-  }
-
-  for (j = 0;j < 64;++j) work[j] = xzm[j];
-}
-
-static void recip(unsigned int out[32],const unsigned int z[32])
-{
-  unsigned int z2[32];
-  unsigned int z9[32];
-  unsigned int z11[32];
-  unsigned int z2_5_0[32];
-  unsigned int z2_10_0[32];
-  unsigned int z2_20_0[32];
-  unsigned int z2_50_0[32];
-  unsigned int z2_100_0[32];
-  unsigned int t0[32];
-  unsigned int t1[32];
-  int i;
-
-  /* 2 */ square(z2,z);
-  /* 4 */ square(t1,z2);
-  /* 8 */ square(t0,t1);
-  /* 9 */ mult(z9,t0,z);
-  /* 11 */ mult(z11,z9,z2);
-  /* 22 */ square(t0,z11);
-  /* 2^5 - 2^0 = 31 */ mult(z2_5_0,t0,z9);
-
-  /* 2^6 - 2^1 */ square(t0,z2_5_0);
-  /* 2^7 - 2^2 */ square(t1,t0);
-  /* 2^8 - 2^3 */ square(t0,t1);
-  /* 2^9 - 2^4 */ square(t1,t0);
-  /* 2^10 - 2^5 */ square(t0,t1);
-  /* 2^10 - 2^0 */ mult(z2_10_0,t0,z2_5_0);
-
-  /* 2^11 - 2^1 */ square(t0,z2_10_0);
-  /* 2^12 - 2^2 */ square(t1,t0);
-  /* 2^20 - 2^10 */ for (i = 2;i < 10;i += 2) { square(t0,t1); square(t1,t0); }
-  /* 2^20 - 2^0 */ mult(z2_20_0,t1,z2_10_0);
-
-  /* 2^21 - 2^1 */ square(t0,z2_20_0);
-  /* 2^22 - 2^2 */ square(t1,t0);
-  /* 2^40 - 2^20 */ for (i = 2;i < 20;i += 2) { square(t0,t1); square(t1,t0); }
-  /* 2^40 - 2^0 */ mult(t0,t1,z2_20_0);
-
-  /* 2^41 - 2^1 */ square(t1,t0);
-  /* 2^42 - 2^2 */ square(t0,t1);
-  /* 2^50 - 2^10 */ for (i = 2;i < 10;i += 2) { square(t1,t0); square(t0,t1); }
-  /* 2^50 - 2^0 */ mult(z2_50_0,t0,z2_10_0);
-
-  /* 2^51 - 2^1 */ square(t0,z2_50_0);
-  /* 2^52 - 2^2 */ square(t1,t0);
-  /* 2^100 - 2^50 */ for (i = 2;i < 50;i += 2) { square(t0,t1); square(t1,t0); }
-  /* 2^100 - 2^0 */ mult(z2_100_0,t1,z2_50_0);
-
-  /* 2^101 - 2^1 */ square(t1,z2_100_0);
-  /* 2^102 - 2^2 */ square(t0,t1);
-  /* 2^200 - 2^100 */ for (i = 2;i < 100;i += 2) { square(t1,t0); square(t0,t1); }
-  /* 2^200 - 2^0 */ mult(t1,t0,z2_100_0);
-
-  /* 2^201 - 2^1 */ square(t0,t1);
-  /* 2^202 - 2^2 */ square(t1,t0);
-  /* 2^250 - 2^50 */ for (i = 2;i < 50;i += 2) { square(t0,t1); square(t1,t0); }
-  /* 2^250 - 2^0 */ mult(t0,t1,z2_50_0);
-
-  /* 2^251 - 2^1 */ square(t1,t0);
-  /* 2^252 - 2^2 */ square(t0,t1);
-  /* 2^253 - 2^3 */ square(t1,t0);
-  /* 2^254 - 2^4 */ square(t0,t1);
-  /* 2^255 - 2^5 */ square(t1,t0);
-  /* 2^255 - 21 */ mult(out,t1,z11);
-}
-
-int crypto_scalarmult_curve25519(unsigned char *q,
-  const unsigned char *n,
-  const unsigned char *p)
-{
-  unsigned int work[96];
-  unsigned char e[32];
-  unsigned int i;
-  for (i = 0;i < 32;++i) e[i] = n[i];
-  e[0] &= 248;
-  e[31] &= 127;
-  e[31] |= 64;
-  for (i = 0;i < 32;++i) work[i] = p[i];
-  mainloop(work,e);
-  recip(work + 32,work + 32);
-  mult(work + 64,work,work + 32);
-  freeze(work + 64);
-  for (i = 0;i < 32;++i) q[i] = work[64 + i];
-  return 0;
-}
-- 
2.20.1