From 31becca303647c6009baca775fb120e13fae7dd8 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Fri, 16 Feb 2018 06:18:03 +0100 Subject: exclude orig from build --- orig/sc25519.c | 306 --------------------------------------------------------- 1 file changed, 306 deletions(-) delete mode 100644 orig/sc25519.c (limited to 'orig/sc25519.c') diff --git a/orig/sc25519.c b/orig/sc25519.c deleted file mode 100644 index 0e324eb..0000000 --- a/orig/sc25519.c +++ /dev/null @@ -1,306 +0,0 @@ -/* $OpenBSD: sc25519.c,v 1.1 2014/07/22 00:41:19 deraadt Exp $ */ - -/* - * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange, - * Peter Schwabe, Bo-Yin Yang. - * Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.c - */ - -#include "sc25519.h" - -/*Arithmetic modulo the group order m = 2^252 + 27742317777372353535851937790883648493 = 7237005577332262213973186563042994240857116359379907606001950938285454250989 */ - -static const crypto_uint32 m[32] = {0xED, 0xD3, 0xF5, 0x5C, 0x1A, 0x63, 0x12, 0x58, 0xD6, 0x9C, 0xF7, 0xA2, 0xDE, 0xF9, 0xDE, 0x14, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10}; - -static const crypto_uint32 mu[33] = {0x1B, 0x13, 0x2C, 0x0A, 0xA3, 0xE5, 0x9C, 0xED, 0xA7, 0x29, 0x63, 0x08, 0x5D, 0x21, 0x06, 0x21, - 0xEB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0F}; - -static crypto_uint32 lt(crypto_uint32 a,crypto_uint32 b) /* 16-bit inputs */ -{ - unsigned int x = a; - x -= (unsigned int) b; /* 0..65535: no; 4294901761..4294967295: yes */ - x >>= 31; /* 0: no; 1: yes */ - return x; -} - -/* Reduce coefficients of r before calling reduce_add_sub */ -static void reduce_add_sub(sc25519 *r) -{ - crypto_uint32 pb = 0; - crypto_uint32 b; - crypto_uint32 mask; - int i; - unsigned char t[32]; - - for(i=0;i<32;i++) - { - pb += m[i]; - b = lt(r->v[i],pb); - t[i] = r->v[i]-pb+(b<<8); - pb = b; - } - mask = b - 1; - for(i=0;i<32;i++) - r->v[i] ^= mask & (r->v[i] ^ t[i]); -} - -/* Reduce coefficients of x before calling barrett_reduce */ -static void barrett_reduce(sc25519 *r, const crypto_uint32 x[64]) -{ - /* See HAC, Alg. 14.42 */ - int i,j; - crypto_uint32 q2[66]; - crypto_uint32 *q3 = q2 + 33; - crypto_uint32 r1[33]; - crypto_uint32 r2[33]; - crypto_uint32 carry; - crypto_uint32 pb = 0; - crypto_uint32 b; - - for (i = 0;i < 66;++i) q2[i] = 0; - for (i = 0;i < 33;++i) r2[i] = 0; - - for(i=0;i<33;i++) - for(j=0;j<33;j++) - if(i+j >= 31) q2[i+j] += mu[i]*x[j+31]; - carry = q2[31] >> 8; - q2[32] += carry; - carry = q2[32] >> 8; - q2[33] += carry; - - for(i=0;i<33;i++)r1[i] = x[i]; - for(i=0;i<32;i++) - for(j=0;j<33;j++) - if(i+j < 33) r2[i+j] += m[i]*q3[j]; - - for(i=0;i<32;i++) - { - carry = r2[i] >> 8; - r2[i+1] += carry; - r2[i] &= 0xff; - } - - for(i=0;i<32;i++) - { - pb += r2[i]; - b = lt(r1[i],pb); - r->v[i] = r1[i]-pb+(b<<8); - pb = b; - } - - /* XXX: Can it really happen that r<0?, See HAC, Alg 14.42, Step 3 - * If so: Handle it here! - */ - - reduce_add_sub(r); - reduce_add_sub(r); -} - -void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]) -{ - int i; - crypto_uint32 t[64]; - for(i=0;i<32;i++) t[i] = x[i]; - for(i=32;i<64;++i) t[i] = 0; - barrett_reduce(r, t); -} - -void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]) -{ - int i; - for(i=0;i<16;i++) r->v[i] = x[i]; -} - -void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]) -{ - int i; - crypto_uint32 t[64]; - for(i=0;i<64;i++) t[i] = x[i]; - barrett_reduce(r, t); -} - -void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x) -{ - int i; - for(i=0;i<16;i++) - r->v[i] = x->v[i]; - for(i=0;i<16;i++) - r->v[16+i] = 0; -} - -void sc25519_to32bytes(unsigned char r[32], const sc25519 *x) -{ - int i; - for(i=0;i<32;i++) r[i] = x->v[i]; -} - -int sc25519_iszero_vartime(const sc25519 *x) -{ - int i; - for(i=0;i<32;i++) - if(x->v[i] != 0) return 0; - return 1; -} - -int sc25519_isshort_vartime(const sc25519 *x) -{ - int i; - for(i=31;i>15;i--) - if(x->v[i] != 0) return 0; - return 1; -} - -int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y) -{ - int i; - for(i=31;i>=0;i--) - { - if(x->v[i] < y->v[i]) return 1; - if(x->v[i] > y->v[i]) return 0; - } - return 0; -} - -void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y) -{ - int i, carry; - for(i=0;i<32;i++) r->v[i] = x->v[i] + y->v[i]; - for(i=0;i<31;i++) - { - carry = r->v[i] >> 8; - r->v[i+1] += carry; - r->v[i] &= 0xff; - } - reduce_add_sub(r); -} - -void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y) -{ - crypto_uint32 b = 0; - crypto_uint32 t; - int i; - for(i=0;i<32;i++) - { - t = x->v[i] - y->v[i] - b; - r->v[i] = t & 255; - b = (t >> 8) & 1; - } -} - -void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y) -{ - int i,j,carry; - crypto_uint32 t[64]; - for(i=0;i<64;i++)t[i] = 0; - - for(i=0;i<32;i++) - for(j=0;j<32;j++) - t[i+j] += x->v[i] * y->v[j]; - - /* Reduce coefficients */ - for(i=0;i<63;i++) - { - carry = t[i] >> 8; - t[i+1] += carry; - t[i] &= 0xff; - } - - barrett_reduce(r, t); -} - -void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y) -{ - sc25519 t; - sc25519_from_shortsc(&t, y); - sc25519_mul(r, x, &t); -} - -void sc25519_window3(signed char r[85], const sc25519 *s) -{ - char carry; - int i; - for(i=0;i<10;i++) - { - r[8*i+0] = s->v[3*i+0] & 7; - r[8*i+1] = (s->v[3*i+0] >> 3) & 7; - r[8*i+2] = (s->v[3*i+0] >> 6) & 7; - r[8*i+2] ^= (s->v[3*i+1] << 2) & 7; - r[8*i+3] = (s->v[3*i+1] >> 1) & 7; - r[8*i+4] = (s->v[3*i+1] >> 4) & 7; - r[8*i+5] = (s->v[3*i+1] >> 7) & 7; - r[8*i+5] ^= (s->v[3*i+2] << 1) & 7; - r[8*i+6] = (s->v[3*i+2] >> 2) & 7; - r[8*i+7] = (s->v[3*i+2] >> 5) & 7; - } - r[8*i+0] = s->v[3*i+0] & 7; - r[8*i+1] = (s->v[3*i+0] >> 3) & 7; - r[8*i+2] = (s->v[3*i+0] >> 6) & 7; - r[8*i+2] ^= (s->v[3*i+1] << 2) & 7; - r[8*i+3] = (s->v[3*i+1] >> 1) & 7; - r[8*i+4] = (s->v[3*i+1] >> 4) & 7; - - /* Making it signed */ - carry = 0; - for(i=0;i<84;i++) - { - r[i] += carry; - r[i+1] += r[i] >> 3; - r[i] &= 7; - carry = r[i] >> 2; - r[i] -= carry<<3; - } - r[84] += carry; -} - -void sc25519_window5(signed char r[51], const sc25519 *s) -{ - char carry; - int i; - for(i=0;i<6;i++) - { - r[8*i+0] = s->v[5*i+0] & 31; - r[8*i+1] = (s->v[5*i+0] >> 5) & 31; - r[8*i+1] ^= (s->v[5*i+1] << 3) & 31; - r[8*i+2] = (s->v[5*i+1] >> 2) & 31; - r[8*i+3] = (s->v[5*i+1] >> 7) & 31; - r[8*i+3] ^= (s->v[5*i+2] << 1) & 31; - r[8*i+4] = (s->v[5*i+2] >> 4) & 31; - r[8*i+4] ^= (s->v[5*i+3] << 4) & 31; - r[8*i+5] = (s->v[5*i+3] >> 1) & 31; - r[8*i+6] = (s->v[5*i+3] >> 6) & 31; - r[8*i+6] ^= (s->v[5*i+4] << 2) & 31; - r[8*i+7] = (s->v[5*i+4] >> 3) & 31; - } - r[8*i+0] = s->v[5*i+0] & 31; - r[8*i+1] = (s->v[5*i+0] >> 5) & 31; - r[8*i+1] ^= (s->v[5*i+1] << 3) & 31; - r[8*i+2] = (s->v[5*i+1] >> 2) & 31; - - /* Making it signed */ - carry = 0; - for(i=0;i<50;i++) - { - r[i] += carry; - r[i+1] += r[i] >> 5; - r[i] &= 31; - carry = r[i] >> 4; - r[i] -= carry<<5; - } - r[50] += carry; -} - -void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2) -{ - int i; - for(i=0;i<31;i++) - { - r[4*i] = ( s1->v[i] & 3) ^ (( s2->v[i] & 3) << 2); - r[4*i+1] = ((s1->v[i] >> 2) & 3) ^ (((s2->v[i] >> 2) & 3) << 2); - r[4*i+2] = ((s1->v[i] >> 4) & 3) ^ (((s2->v[i] >> 4) & 3) << 2); - r[4*i+3] = ((s1->v[i] >> 6) & 3) ^ (((s2->v[i] >> 6) & 3) << 2); - } - r[124] = ( s1->v[31] & 3) ^ (( s2->v[31] & 3) << 2); - r[125] = ((s1->v[31] >> 2) & 3) ^ (((s2->v[31] >> 2) & 3) << 2); - r[126] = ((s1->v[31] >> 4) & 3) ^ (((s2->v[31] >> 4) & 3) << 2); -} -- cgit v1.2.3