From 3957c22e287ddcd9e4d7decd64d3b8ffdf554a06 Mon Sep 17 00:00:00 2001
From: Steffen Jaeckel <s@jaeckel.eu>
Date: Sun, 9 Jun 2019 21:24:20 +0200
Subject: [PATCH] remove unused code from tweetnacl

---
 src/pk/ec25519/tweetnacl.c | 121 -------------------------------------
 1 file changed, 121 deletions(-)

diff --git a/src/pk/ec25519/tweetnacl.c b/src/pk/ec25519/tweetnacl.c
index dc735e8a..7b7b29c4 100644
--- a/src/pk/ec25519/tweetnacl.c
+++ b/src/pk/ec25519/tweetnacl.c
@@ -31,22 +31,6 @@ static const gf
   Y = {0x6658, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666, 0x6666},
   I = {0xa0b0, 0x4a0e, 0x1b27, 0xc4ee, 0xe478, 0xad2f, 0x1806, 0x2f43, 0xd7a7, 0x3dfb, 0x0099, 0x2b4d, 0xdf0b, 0x4fc1, 0x2480, 0x2b83};
 
-static u32 L32(u32 x,int c) { return (x << c) | ((x&0xffffffff) >> (32 - c)); }
-
-static u32 ld32(const u8 *x)
-{
-  u32 u = x[3];
-  u = (u<<8)|x[2];
-  u = (u<<8)|x[1];
-  return (u<<8)|x[0];
-}
-
-sv st32(u8 *x,u32 u)
-{
-  int i;
-  FOR(i,4) { x[i] = u; u >>= 8; }
-}
-
 static int vn(const u8 *x,const u8 *y,int n)
 {
   int i;
@@ -55,116 +39,11 @@ static int vn(const u8 *x,const u8 *y,int n)
   return (1 & ((d - 1) >> 8)) - 1;
 }
 
-int crypto_verify_16(const u8 *x,const u8 *y)
-{
-  return vn(x,y,16);
-}
-
 int crypto_verify_32(const u8 *x,const u8 *y)
 {
   return vn(x,y,32);
 }
 
-sv core(u8 *out,const u8 *in,const u8 *k,const u8 *c,int h)
-{
-  u32 w[16],x[16],y[16],t[4];
-  int i,j,m;
-
-  FOR(i,4) {
-    x[5*i] = ld32(c+4*i);
-    x[1+i] = ld32(k+4*i);
-    x[6+i] = ld32(in+4*i);
-    x[11+i] = ld32(k+16+4*i);
-  }
-
-  FOR(i,16) y[i] = x[i];
-
-  FOR(i,20) {
-    FOR(j,4) {
-      FOR(m,4) t[m] = x[(5*j+4*m)%16];
-      t[1] ^= L32(t[0]+t[3], 7);
-      t[2] ^= L32(t[1]+t[0], 9);
-      t[3] ^= L32(t[2]+t[1],13);
-      t[0] ^= L32(t[3]+t[2],18);
-      FOR(m,4) w[4*j+(j+m)%4] = t[m];
-    }
-    FOR(m,16) x[m] = w[m];
-  }
-
-  if (h) {
-    FOR(i,16) x[i] += y[i];
-    FOR(i,4) {
-      x[5*i] -= ld32(c+4*i);
-      x[6+i] -= ld32(in+4*i);
-    }
-    FOR(i,4) {
-      st32(out+4*i,x[5*i]);
-      st32(out+16+4*i,x[6+i]);
-    }
-  } else
-    FOR(i,16) st32(out + 4 * i,x[i] + y[i]);
-}
-
-int crypto_core_salsa20(u8 *out,const u8 *in,const u8 *k,const u8 *c)
-{
-  core(out,in,k,c,0);
-  return 0;
-}
-
-int crypto_core_hsalsa20(u8 *out,const u8 *in,const u8 *k,const u8 *c)
-{
-  core(out,in,k,c,1);
-  return 0;
-}
-
-static const u8 sigma[16] = "expand 32-byte k";
-
-int crypto_stream_salsa20_xor(u8 *c,const u8 *m,u64 b,const u8 *n,const u8 *k)
-{
-  u8 z[16],x[64];
-  u32 u,i;
-  if (!b) return 0;
-  FOR(i,16) z[i] = 0;
-  FOR(i,8) z[i] = n[i];
-  while (b >= 64) {
-    crypto_core_salsa20(x,z,k,sigma);
-    FOR(i,64) c[i] = (m?m[i]:0) ^ x[i];
-    u = 1;
-    for (i = 8;i < 16;++i) {
-      u += (u32) z[i];
-      z[i] = u;
-      u >>= 8;
-    }
-    b -= 64;
-    c += 64;
-    if (m) m += 64;
-  }
-  if (b) {
-    crypto_core_salsa20(x,z,k,sigma);
-    FOR(i,b) c[i] = (m?m[i]:0) ^ x[i];
-  }
-  return 0;
-}
-
-int crypto_stream_salsa20(u8 *c,u64 d,const u8 *n,const u8 *k)
-{
-  return crypto_stream_salsa20_xor(c,0,d,n,k);
-}
-
-int crypto_stream(u8 *c,u64 d,const u8 *n,const u8 *k)
-{
-  u8 s[32];
-  crypto_core_hsalsa20(s,n,k,sigma);
-  return crypto_stream_salsa20(c,d,n+16,s);
-}
-
-int crypto_stream_xor(u8 *c,const u8 *m,u64 d,const u8 *n,const u8 *k)
-{
-  u8 s[32];
-  crypto_core_hsalsa20(s,n,k,sigma);
-  return crypto_stream_salsa20_xor(c,m,d,n+16,s);
-}
-
 sv set25519(gf r, const gf a)
 {
   int i;