/* with GT-Strong curve, now only check that m!=1, conj(m)*m==1, and m.m^{p^4}=m^{p^2} */
int PAIR_GTmember(FP12 *m)
{
BIG a,b;
FP2 X;
FP12 r,w;
if (FP12_isunity(m)) return 0;
FP12_conj(&r,m);
FP12_mul(&r,m);
if (!FP12_isunity(&r)) return 0;
BIG_rcopy(a,CURVE_Fra);
BIG_rcopy(b,CURVE_Frb);
FP2_from_BIGs(&X,a,b);
FP12_copy(&r,m); FP12_frob(&r,&X); FP12_frob(&r,&X);
FP12_copy(&w,&r); FP12_frob(&w,&X); FP12_frob(&w,&X);
FP12_mul(&w,m);
#ifndef GT_STRONG
if (!FP12_equals(&w,&r)) return 0;
BIG_rcopy(a,CURVE_Bnx);
FP12_copy(&r,m); FP12_pow(&w,&r,a); FP12_pow(&w,&w,a);
FP12_sqr(&r,&w); FP12_mul(&r,&w); FP12_sqr(&r,&r);
FP12_copy(&w,m); FP12_frob(&w,&X);
#endif
return FP12_equals(&w,&r);
}
/* Galbraith & Scott Method */
static void gs(BIG u[4],BIG e)
{
int i,j;
BIG v[4],t,q;
DBIG d;
BIG_rcopy(q,CURVE_Order);
for (i=0;i<4;i++)
{
BIG_rcopy(t,CURVE_WB[i]);
BIG_mul(d,t,e);
BIG_ddiv(v[i],d,q);
BIG_zero(u[i]);
}
BIG_copy(u[0],e);
for (i=0;i<4;i++)
for (j=0;j<4;j++)
{
BIG_rcopy(t,CURVE_BB[j][i]);
BIG_modmul(t,v[j],t,q);
BIG_add(u[i],u[i],q);
BIG_sub(u[i],u[i],t);
BIG_mod(u[i],q);
}
return;
}
/*
#if CHOICE==BN254_T
const BIG TEST_Gx={0x18AFF11A,0xF2EF406,0xAF68220,0x171F2E27,0x6BA0959,0x124C50E0,0x450BE27,0x7003EA8,0x8A914};
const BIG TEST_Gy={0x6E010F4,0xA71D07E,0x7ECADA8,0x8260E8E,0x1F79C328,0x17A09412,0xBFAE690,0x1C57CBD1,0x17DF54};
const BIG TEST_Pxa={0x1047D566,0xD83CD71,0x10322E9D,0x991FA93,0xA282C48,0x18AEBEC8,0xCB05850,0x13B4F669,0x21794A};
const BIG TEST_Pxb={0x1E305936,0x16885BF1,0x327060,0xE26F794,0x1547D870,0x1963E5B2,0x1BEBB96C,0x988A33C,0x1A9B47};
const BIG TEST_Pya={0x20FF876,0x4427E67,0x18732211,0xE88E45E,0x174D1A7E,0x17D877ED,0x343AB37,0x97EB453,0xB00D5};
const BIG TEST_Pyb={0x1D746B7B,0x732F4C2,0x122A49B0,0x16267985,0x235DF56,0x10B1E4D,0x14D8F210,0x17A05C3E,0x5ECF8};
#endif
#if CHOICE==BN254_T2
const BIG TEST_Gx={0x15488765,0x46790D7,0xD9900A,0x1DFB43F,0x9F2D307,0xC4724E8,0x5678E51,0x15C3E3A7,0x1BEC8E};
const BIG TEST_Gy={0x3D3273C,0x1AFA5FF,0x1880A139,0xACD34DF,0x17493067,0x10FA4103,0x1D4C9766,0x1A73F3DB,0x2D148};
const BIG TEST_Pxa={0xF8DC275,0xAC27FA,0x11815151,0x152691C8,0x5CDEBF1,0x7D5A965,0x1BF70CE3,0x679A1C8,0xD62CF};
const BIG TEST_Pxb={0x1D17D7A8,0x6B28DF4,0x174A0389,0xFE67E5F,0x1FA97A3C,0x7F5F473,0xFFB5146,0x4BC19A5,0x227010};
const BIG TEST_Pya={0x16CC1F90,0x5284627,0x171B91AB,0x11F843B9,0x1D468755,0x67E279C,0x19FE0EF8,0x1A0CAA6B,0x1CC6CB};
const BIG TEST_Pyb={0x1FF0CF2A,0xBC83255,0x6DD6EE8,0xB8B752F,0x13E484EC,0x1809BE81,0x1A648AA1,0x8CEF3F3,0x86EE};
#endif
#if CHOICE==BN254
const BIG TEST_Gx={0x14BEC4670E4EB7,0xEA2973860F6861,0x35C14B2FC3C28F,0x4402A0B63B9473,0x2074A81D};
const BIG TEST_Gy={0xC284846631CBEB,0x34A6E8D871B3B,0x89FB94A82B2006,0x87B20038771FC,0x6A41108};
const BIG TEST_Pxa={0xE4A00F52183C77,0x554E02DF4F8354,0xB65EB5CF1C2F89,0x8B71A87BFCFC9,0x49EEDB1};
const BIG TEST_Pxb={0xCFB8FA9AA8845D,0x8A9CC76D966697,0x185BA05BF5EC08,0x76140E87D97226,0x1FB93AB6};
const BIG TEST_Pya={0x3644CC1EDF208A,0xA637FB3FF8E257,0x4453DA2BB9E686,0xD14AD3CDF6A1FE,0xCD04A1E};
const BIG TEST_Pyb={0x71BD7630A43C14,0x1CAA9F14EA264E,0x3C3C2DFC765DEF,0xCF59D1A1A7D6EE,0x11FF7795};
#endif
*/
int main()
{
int i;
char byt[32];
csprng rng;
BIG xa,xb,ya,yb,w,a,b,t1,q,u[2],v[4],m,r;
ECP2 P,G;
ECP Q,R;
FP12 g,gp;
FP4 t,c,cp,cpm1,cpm2;
FP2 x,y,X;
BIG_rcopy(a,CURVE_Fra);
BIG_rcopy(b,CURVE_Frb);
FP2_from_BIGs(&X,a,b);
BIG_rcopy(xa,CURVE_Gx);
BIG_rcopy(ya,CURVE_Gy);
ECP_set(&Q,xa,ya);
if (Q.inf) printf("Failed to set - point not on curve\n");
else printf("G1 set success\n");
printf("Q= ");
ECP_output(&Q);
printf("\n");
// BIG_rcopy(r,CURVE_Order); BIG_dec(r,7); BIG_norm(r);
BIG_rcopy(xa,CURVE_Pxa);
BIG_rcopy(xb,CURVE_Pxb);
BIG_rcopy(ya,CURVE_Pya);
BIG_rcopy(yb,CURVE_Pyb);
FP2_from_BIGs(&x,xa,xb);
FP2_from_BIGs(&y,ya,yb);
ECP2_set(&P,&x,&y);
if (P.inf) printf("Failed to set - point not on curve\n");
else printf("G2 set success\n");
printf("P= ");
ECP2_output(&P);
printf("\n");
for (i=0; i<1000; i++ )
{
PAIR_ate(&g,&P,&Q);
PAIR_fexp(&g);
// PAIR_GTpow(&g,xa);
}
printf("g= ");
FP12_output(&g);
printf("\n");
}
/* Multiply P by e in group G2 */
void PAIR_G2mul(ECP2 *P,BIG e)
{
#ifdef USE_GS_G2 /* Well I didn't patent it :) */
int i,np,nn;
ECP2 Q[4];
FP2 X;
BIG x,y;
BIG u[4];
BIG_rcopy(x,CURVE_Fra);
BIG_rcopy(y,CURVE_Frb);
FP2_from_BIGs(&X,x,y);
BIG_rcopy(y,CURVE_Order);
gs(u,e);
ECP2_affine(P);
ECP2_copy(&Q[0],P);
for (i=1; i<4; i++)
{
ECP2_copy(&Q[i],&Q[i-1]);
ECP2_frob(&Q[i],&X);
}
for (i=0; i<4; i++)
{
np=BIG_nbits(u[i]);
BIG_modneg(x,u[i],y);
nn=BIG_nbits(x);
if (nn<np)
{
BIG_copy(u[i],x);
ECP2_neg(&Q[i]);
}
}
ECP2_mul4(P,Q,u);
#else
ECP2_mul(P,e);
#endif
}
/* Galbraith & Scott Method */
static void gs(BIG u[4],BIG e)
{
int i;
#if CHOICE<BLS_CURVES
int j;
BIG v[4],t,q;
DBIG d;
BIG_rcopy(q,CURVE_Order);
for (i=0; i<4; i++)
{
BIG_rcopy(t,CURVE_WB[i]);
//BIG_norm(t); BIG_norm(e);
BIG_mul(d,t,e);
BIG_ddiv(v[i],d,q);
BIG_zero(u[i]);
}
BIG_copy(u[0],e);
for (i=0; i<4; i++)
for (j=0; j<4; j++)
{
BIG_rcopy(t,CURVE_BB[j][i]);
BIG_modmul(t,v[j],t,q);
BIG_add(u[i],u[i],q);
BIG_sub(u[i],u[i],t);
BIG_mod(u[i],q);
}
#else
BIG x,w;
BIG_rcopy(x,CURVE_Bnx);
BIG_copy(w,e);
for (i=0; i<4; i++)
{
BIG_copy(u[i],w);
BIG_mod(u[i],x);
BIG_sdiv(w,x);
}
#endif
return;
}
/* GLV method */
static void glv(BIG u[2],BIG e)
{
#if CHOICE<BLS_CURVES
int i,j;
BIG v[2],t,q;
DBIG d;
BIG_rcopy(q,CURVE_Order);
for (i=0; i<2; i++)
{
BIG_rcopy(t,CURVE_W[i]);
//BIG_norm(t); BIG_norm(e);
BIG_mul(d,t,e);
BIG_ddiv(v[i],d,q);
BIG_zero(u[i]);
}
BIG_copy(u[0],e);
for (i=0; i<2; i++)
for (j=0; j<2; j++)
{
BIG_rcopy(t,CURVE_SB[j][i]);
BIG_modmul(t,v[j],t,q);
BIG_add(u[i],u[i],q);
BIG_sub(u[i],u[i],t);
BIG_mod(u[i],q);
}
#else
// -(x^2).P = (Beta.x,y)
BIG x,x2,q;
BIG_rcopy(x,CURVE_Bnx);
BIG_smul(x2,x,x);
BIG_copy(u[0],e);
BIG_mod(u[0],x2);
BIG_copy(u[1],e);
BIG_sdiv(u[1],x2);
BIG_rcopy(q,CURVE_Order);
BIG_sub(u[1],q,u[1]);
#endif
return;
}
/* Multiply P by e in group G1 */
void PAIR_G1mul(ECP *P,BIG e)
{
#ifdef USE_GLV /* Note this method is patented */
int i,np,nn;
ECP Q;
BIG cru,t,q;
BIG u[2];
BIG_rcopy(q,CURVE_Order);
glv(u,e);
ECP_affine(P);
ECP_copy(&Q,P);
BIG_rcopy(cru,CURVE_Cru);
FP_nres(cru);
FP_mul(Q.x,Q.x,cru);
/* note that -a.B = a.(-B). Use a or -a depending on which is smaller */
np=BIG_nbits(u[0]);
BIG_modneg(t,u[0],q);
nn=BIG_nbits(t);
if (nn<np)
{
BIG_copy(u[0],t);
ECP_neg(P);
}
np=BIG_nbits(u[1]);
BIG_modneg(t,u[1],q);
nn=BIG_nbits(t);
if (nn<np)
{
BIG_copy(u[1],t);
ECP_neg(&Q);
}
ECP_mul2(P,&Q,u[0],u[1]);
#else
ECP_mul(P,e);
#endif
}
/* map octet string to point on curve */
static void mapit(octet *h,ECP *P)
{
BIG q,px;
BIG_fromBytes(px,h->val);
BIG_rcopy(q,Modulus);
BIG_mod(px,q);
while (!ECP_setx(P,px,0))
BIG_inc(px,1);
}
/* maps a random u to a point on the curve */
static void map(ECP *P,BIG u,int cb)
{
BIG x,q;
BIG_rcopy(q,Modulus);
BIG_copy(x,u);
BIG_mod(x,q);
while (!ECP_setx(P,x,cb))
BIG_inc(x,1);
}
/* f=f^e */
void PAIR_GTpow(FP12 *f,BIG e)
{
#ifdef USE_GS_GT /* Note that this option requires a lot of RAM! Maybe better to use compressed XTR method, see fp4.c */
int i,np,nn;
FP12 g[4];
FP2 X;
BIG t,q,x,y;
BIG u[4];
BIG_rcopy(x,CURVE_Fra);
BIG_rcopy(y,CURVE_Frb);
FP2_from_BIGs(&X,x,y);
BIG_rcopy(q,CURVE_Order);
gs(u,e);
FP12_copy(&g[0],f);
for (i=1; i<4; i++)
{
FP12_copy(&g[i],&g[i-1]);
FP12_frob(&g[i],&X);
}
for (i=0; i<4; i++)
{
np=BIG_nbits(u[i]);
BIG_modneg(t,u[i],q);
nn=BIG_nbits(t);
if (nn<np)
{
BIG_copy(u[i],t);
FP12_conj(&g[i],&g[i]);
}
}
FP12_pow4(f,g,u);
#else
FP12_pow(f,f,e);
#endif
}
/* needed for SOK */
static void mapit2(octet *h,ECP2 *Q)
{
BIG q,one,Fx,Fy,x,hv;
FP2 X;
ECP2 T,K;
BIG_fromBytes(hv,h->val);
BIG_rcopy(q,Modulus);
BIG_one(one);
BIG_mod(hv,q);
for (;;)
{
FP2_from_BIGs(&X,one,hv);
if (ECP2_setx(Q,&X)) break;
BIG_inc(hv,1);
}
/* Fast Hashing to G2 - Fuentes-Castaneda, Knapp and Rodriguez-Henriquez */
BIG_rcopy(Fx,CURVE_Fra);
BIG_rcopy(Fy,CURVE_Frb);
FP2_from_BIGs(&X,Fx,Fy);
BIG_rcopy(x,CURVE_Bnx);
ECP2_copy(&T,Q);
ECP2_mul(&T,x);
ECP2_neg(&T); /* our x is negative */
ECP2_copy(&K,&T);
ECP2_dbl(&K);
ECP2_add(&K,&T);
ECP2_affine(&K);
ECP2_frob(&K,&X);
ECP2_frob(Q,&X); ECP2_frob(Q,&X); ECP2_frob(Q,&X);
ECP2_add(Q,&T);
ECP2_add(Q,&K);
ECP2_frob(&T,&X); ECP2_frob(&T,&X);
ECP2_add(Q,&T);
ECP2_affine(Q);
}
int main()
{
csprng RNG;
BIG s,r,x,y;
ECP P,G;
FP12 g;
int i,iterations;
clock_t start;
double elapsed;
char pr[10];
unsigned long ran;
rsa_public_key pub;
rsa_private_key priv;
char m[RFS],d[RFS],c[RFS];
octet M= {0,sizeof(m),m};
octet D= {0,sizeof(d),d};
octet C= {0,sizeof(c),c};
#if CHOICE==NIST256
printf("NIST256 Curve\n");
#endif
#if CHOICE==C25519
printf("C25519 Curve\n");
#endif
#if CHOICE==BRAINPOOL
printf("BRAINPOOL Curve\n");
#endif
#if CHOICE==ANSSI
printf("ANSSI Curve\n");
#endif
#if CHOICE==MF254
printf("MF254 Curve\n");
#endif
#if CHOICE==MS255
printf("MS255 Curve\n");
#endif
#if CHOICE==MF256
printf("MF256 Curve\n");
#endif
#if CHOICE==MS256
printf("MS256 Curve\n");
#endif
#if CHOICE==HIFIVE
printf("HIFIVE Curve\n");
#endif
#if CHOICE==GOLDILOCKS
printf("GOLDILOCKS Curve\n");
#endif
#if CHOICE==NIST384
printf("NIST384 Curve\n");
#endif
#if CHOICE==C41417
printf("C41417 Curve\n");
#endif
#if CHOICE==NIST521
printf("NIST521 Curve\n");
#endif
#if CHOICE==BN254
printf("BN254 Curve\n");
#endif
#if CHOICE==BN454
printf("BN454 Curve\n");
#endif
#if CHOICE==BN646
printf("BN646 Curve\n");
#endif
#if CHOICE==BN254_CX
printf("BN254_CX Curve\n");
#endif
#if CHOICE==BN254_T
printf("BN254_T Curve\n");
#endif
#if CHOICE==BN254_T2
printf("BN254_T2 Curve\n");
#endif
#if CHOICE==BLS455
printf("BLS455 Curve\n");
#endif
#if CHOICE==BLS383
printf("BLS383 Curve\n");
#endif
#if CURVETYPE==WEIERSTRASS
printf("Weierstrass parameterization\n");
#endif
#if CURVETYPE==EDWARDS
printf("Edwards parameterization\n");
#endif
#if CURVETYPE==MONTGOMERY
printf("Montgomery parameterization\n");
#endif
#if CHUNK==16
printf("16-bit Build\n");
#endif
#if CHUNK==32
printf("32-bit Build\n");
#endif
#if CHUNK==64
printf("64-bit Build\n");
#endif
time((time_t *)&ran);
pr[0]=ran;
pr[1]=ran>>8;
pr[2]=ran>>16;
pr[3]=ran>>24;
for (i=4;i<10;i++) pr[i]=i;
RAND_seed(&RNG,10,pr);
BIG_rcopy(x,CURVE_Gx);
#if CURVETYPE!=MONTGOMERY
BIG_rcopy(y,CURVE_Gy);
ECP_set(&G,x,y);
#else
ECP_set(&G,x);
#endif
BIG_rcopy(r,CURVE_Order);
BIG_randomnum(s,r,&RNG);
ECP_copy(&P,&G);
ECP_mul(&P,r);
if (!ECP_isinf(&P))
{
printf("FAILURE - rG!=O\n");
return 0;
}
iterations=0;
start=clock();
do {
ECP_copy(&P,&G);
ECP_mul(&P,s);
iterations++;
elapsed=(clock()-start)/(double)CLOCKS_PER_SEC;
} while (elapsed<MIN_TIME || iterations<MIN_ITERS);
elapsed=1000.0*elapsed/iterations;
printf("EC mul - %8d iterations ",iterations);
printf(" %8.2lf ms per iteration\n",elapsed);
printf("Generating %d-bit RSA public/private key pair\n",FFLEN*BIGBITS);
iterations=0;
start=clock();
do {
RSA_KEY_PAIR(&RNG,65537,&priv,&pub,NULL,NULL);
iterations++;
elapsed=(clock()-start)/(double)CLOCKS_PER_SEC;
} while (elapsed<MIN_TIME || iterations<MIN_ITERS);
elapsed=1000.0*elapsed/iterations;
printf("RSA gen - %8d iterations ",iterations);
printf(" %8.2lf ms per iteration\n",elapsed);
//FF_randomnum(plain,pub.n,&RNG,FFLEN);
M.len=RFS;
for (i=0;i<RFS;i++) M.val[i]=i%128;
iterations=0;
start=clock();
do {
RSA_ENCRYPT(&pub,&M,&C);
iterations++;
elapsed=(clock()-start)/(double)CLOCKS_PER_SEC;
} while (elapsed<MIN_TIME || iterations<MIN_ITERS);
elapsed=1000.0*elapsed/iterations;
printf("RSA enc - %8d iterations ",iterations);
printf(" %8.2lf ms per iteration\n",elapsed);
iterations=0;
start=clock();
do {
RSA_DECRYPT(&priv,&C,&D);
iterations++;
elapsed=(clock()-start)/(double)CLOCKS_PER_SEC;
} while (elapsed<MIN_TIME || iterations<MIN_ITERS);
elapsed=1000.0*elapsed/iterations;
printf("RSA dec - %8d iterations ",iterations);
printf(" %8.2lf ms per iteration\n",elapsed);
for (i=0;i<RFS;i++)
{
if (M.val[i]!=D.val[i])
{
printf("FAILURE - RSA decryption\n");
return 0;
}
}
printf("All tests pass\n");
return 0;
}
/* Optimal R-ate pairing r=e(P,Q) */
void PAIR_ate(FP12 *r,ECP2 *P,ECP *Q)
{
FP2 X;
BIG x,n,Qx,Qy;
int i,nb;
ECP2 A;
FP12 lv;
#if CHOICE<BLS_CURVES
ECP2 KA;
#endif
BIG_rcopy(Qx,CURVE_Fra);
BIG_rcopy(Qy,CURVE_Frb);
FP2_from_BIGs(&X,Qx,Qy);
BIG_rcopy(x,CURVE_Bnx);
#if CHOICE<BLS_CURVES
BIG_pmul(n,x,6);
BIG_dec(n,2);
#else
BIG_copy(n,x);
#endif
BIG_norm(n);
ECP2_affine(P);
ECP_affine(Q);
BIG_copy(Qx,Q->x);
BIG_copy(Qy,Q->y);
ECP2_copy(&A,P);
FP12_one(r);
nb=BIG_nbits(n);
/* Main Miller Loop */
for (i=nb-2; i>=1; i--)
{
PAIR_line(&lv,&A,&A,Qx,Qy);
FP12_smul(r,&lv);
if (BIG_bit(n,i))
{
PAIR_line(&lv,&A,P,Qx,Qy);
FP12_smul(r,&lv);
}
FP12_sqr(r,r);
}
PAIR_line(&lv,&A,&A,Qx,Qy);
FP12_smul(r,&lv);
if (BIG_parity(n))
{
PAIR_line(&lv,&A,P,Qx,Qy);
FP12_smul(r,&lv);
}
/* R-ate fixup required for BN curves */
#if CHOICE<BLS_CURVES
ECP2_copy(&KA,P);
ECP2_frob(&KA,&X);
ECP2_neg(&A);
FP12_conj(r,r);
PAIR_line(&lv,&A,&KA,Qx,Qy);
FP12_smul(r,&lv);
ECP2_frob(&KA,&X);
ECP2_neg(&KA);
PAIR_line(&lv,&A,&KA,Qx,Qy);
FP12_smul(r,&lv);
#endif
}
/* final exponentiation - keep separate for multi-pairings and to avoid thrashing stack */
void PAIR_fexp(FP12 *r)
{
FP2 X;
BIG x,a,b;
FP12 t0,y0,y1,y2,y3;
BIG_rcopy(x,CURVE_Bnx);
BIG_rcopy(a,CURVE_Fra);
BIG_rcopy(b,CURVE_Frb);
FP2_from_BIGs(&X,a,b);
/* Easy part of final exp */
FP12_inv(&t0,r);
FP12_conj(r,r);
FP12_mul(r,&t0);
FP12_copy(&t0,r);
FP12_frob(r,&X);
FP12_frob(r,&X);
FP12_mul(r,&t0);
/* Hard part of final exp - see Duquesne & Ghamman eprint 2015/192.pdf */
#if CHOICE<BLS_CURVES
FP12_pow(&t0,r,x); // t0=f^-u
FP12_usqr(&y3,&t0); // y3=t0^2
FP12_copy(&y0,&t0);
FP12_mul(&y0,&y3); // y0=t0*y3
FP12_copy(&y2,&y3);
FP12_frob(&y2,&X); // y2=y3^p
FP12_mul(&y2,&y3); //y2=y2*y3
FP12_usqr(&y2,&y2); //y2=y2^2
FP12_mul(&y2,&y3); // y2=y2*y3
FP12_pow(&t0,&y0,x); //t0=y0^-u
FP12_conj(&y0,r); //y0=~r
FP12_copy(&y1,&t0);
FP12_frob(&y1,&X);
FP12_frob(&y1,&X); //y1=t0^p^2
FP12_mul(&y1,&y0); // y1=y0*y1
FP12_conj(&t0,&t0); // t0=~t0
FP12_copy(&y3,&t0);
FP12_frob(&y3,&X); //y3=t0^p
FP12_mul(&y3,&t0); // y3=t0*y3
FP12_usqr(&t0,&t0); // t0=t0^2
FP12_mul(&y1,&t0); // y1=t0*y1
FP12_pow(&t0,&y3,x); // t0=y3^-u
FP12_usqr(&t0,&t0); //t0=t0^2
FP12_conj(&t0,&t0); //t0=~t0
FP12_mul(&y3,&t0); // y3=t0*y3
FP12_frob(r,&X);
FP12_copy(&y0,r);
FP12_frob(r,&X);
FP12_mul(&y0,r);
FP12_frob(r,&X);
FP12_mul(&y0,r);
FP12_usqr(r,&y3); //r=y3^2
FP12_mul(r,&y2); //r=y2*r
FP12_copy(&y3,r);
FP12_mul(&y3,&y0); // y3=r*y0
FP12_mul(r,&y1); // r=r*y1
FP12_usqr(r,r); // r=r^2
FP12_mul(r,&y3); // r=r*y3
FP12_reduce(r);
#else
// Ghamman & Fouotsa Method
FP12_usqr(&y0,r);
FP12_pow(&y1,&y0,x);
BIG_fshr(x,1);
FP12_pow(&y2,&y1,x);
BIG_fshl(x,1); // x must be even
FP12_conj(&y3,r);
FP12_mul(&y1,&y3);
FP12_conj(&y1,&y1);
FP12_mul(&y1,&y2);
FP12_pow(&y2,&y1,x);
FP12_pow(&y3,&y2,x);
FP12_conj(&y1,&y1);
FP12_mul(&y3,&y1);
FP12_conj(&y1,&y1);
FP12_frob(&y1,&X);
FP12_frob(&y1,&X);
FP12_frob(&y1,&X);
FP12_frob(&y2,&X);
FP12_frob(&y2,&X);
FP12_mul(&y1,&y2);
FP12_pow(&y2,&y3,x);
FP12_mul(&y2,&y0);
FP12_mul(&y2,r);
FP12_mul(&y1,&y2);
FP12_copy(&y2,&y3);
FP12_frob(&y2,&X);
FP12_mul(&y1,&y2);
FP12_copy(r,&y1);
FP12_reduce(r);
// Aranha et al method as described by Ghamman & Fouotsa
/*
FP12_usqr(&y0,r); // t0=f^2
FP12_conj(&y3,&y0); // t0=f^-2
FP12_pow(&t0,r,x); // t5=f^u
FP12_usqr(&y1,&t0); // t1=t5^2
FP12_mul(&y3,&t0); // t3=t0*t5
FP12_pow(&y0,&y3,x);
FP12_pow(&y2,&y0,x);
FP12_pow(&y4,&y2,x);
FP12_mul(&y4,&y1);
FP12_pow(&y1,&y4,x);
FP12_conj(&y3,&y3);
FP12_mul(&y1,&y3);
FP12_mul(&y1,r);
FP12_conj(&y3,r);
FP12_mul(&y0,r);
FP12_frob(&y0,&X); FP12_frob(&y0,&X); FP12_frob(&y0,&X);
FP12_mul(&y4,&y3);
FP12_frob(&y4,&X);
FP12_mul(&t0,&y2);
FP12_frob(&t0,&X); FP12_frob(&t0,&X);
FP12_mul(&t0,&y0);
FP12_mul(&t0,&y4);
FP12_mul(&t0,&y1);
FP12_copy(r,&t0);
FP12_reduce(r);*/
//-----------------------------------
/*
FP12_copy(&y0,r); // y0=r;
FP12_copy(&y1,r); // y1=r;
FP12_copy(&t0,r); FP12_frob(&t0,&X); // t0=Frobenius(r,X,1);
FP12_conj(&y3,&t0); FP12_mul(&y1,&y3); // y1*=inverse(t0);
FP12_frob(&t0,&X); FP12_frob(&t0,&X); // t0=Frobenius(t0,X,2);
FP12_mul(&y1,&t0); // y1*=t0;
FP12_pow(r,r,x); // r=pow(r,x);
FP12_conj(&y3,r); FP12_mul(&y1,&y3); // y1*=inverse(r);
FP12_copy(&t0,r); FP12_frob(&t0,&X); // t0=Frobenius(r,X,1);
FP12_mul(&y0,&t0); // y0*=t0;
FP12_frob(&t0,&X); // t0=Frobenius(t0,X,1);
FP12_mul(&y1,&t0); // y1*=t0;
FP12_frob(&t0,&X); // t0=Frobenius(t0,X,1);
FP12_conj(&y3,&t0); FP12_mul(&y0,&y3); // y0*=inverse(t0);
FP12_pow(r,r,x); // r=pow(r,x);
FP12_mul(&y0,r); // y0*=r;
FP12_copy(&t0,r); FP12_frob(&t0,&X); FP12_frob(&t0,&X); // t0=Frobenius(r,X,2);
FP12_conj(&y3,&t0); FP12_mul(&y0,&y3); // y0*=inverse(t0);
FP12_frob(&t0,&X); // t0=Frobenius(t0,X,1);
FP12_mul(&y1,&t0); // y1*=t0;
FP12_pow(r,r,x); // r=pow(r,x); // r^x3
FP12_copy(&t0,r); FP12_frob(&t0,&X); // t0=Frobenius(r,X,1);
FP12_conj(&y3,&t0); FP12_mul(&y0,&y3); // y0*=inverse(t0);
FP12_frob(&t0,&X); // t0=Frobenius(t0,X,1);
FP12_mul(&y1,&t0); // y1*=t0;
FP12_pow(r,r,x); // r=pow(r,x); // r^x4
FP12_conj(&y3,r); FP12_mul(&y0,&y3); // y0*=inverse(r);
FP12_copy(&t0,r); FP12_frob(&t0,&X); // t0=Frobenius(r,X,1);
FP12_mul(&y1,&t0); //y1*=t0;
FP12_pow(r,r,x); // r=pow(r,x); // r^x5
FP12_mul(&y1,r); // y1*=r;
FP12_usqr(&y0,&y0); // r=y0*y0*y1;
FP12_mul(&y0,&y1);
FP12_copy(r,&y0);
FP12_reduce(r); */
#endif
}
/* Optimal R-ate pairing r=e(P,Q) */
void PAIR_ate(FP12 *r,ECP2 *P,ECP *Q)
{
FP2 X;
BIG x,n,Qx,Qy;
int i,nb;
ECP2 A,KA;
FP12 lv;
BIG_rcopy(Qx,CURVE_Fra);
BIG_rcopy(Qy,CURVE_Frb);
FP2_from_BIGs(&X,Qx,Qy);
BIG_rcopy(x,CURVE_Bnx);
BIG_pmul(n,x,6);
BIG_dec(n,2);
BIG_norm(n);
ECP2_affine(P);
ECP_affine(Q);
BIG_copy(Qx,Q->x);
BIG_copy(Qy,Q->y);
ECP2_copy(&A,P);
FP12_one(r);
nb=BIG_nbits(n);
/* Main Miller Loop */
for (i=nb-2;i>=1;i--)
{
PAIR_line(&lv,&A,&A,Qx,Qy);
FP12_smul(r,&lv);
if (BIG_bit(n,i))
{
PAIR_line(&lv,&A,P,Qx,Qy);
FP12_smul(r,&lv);
}
FP12_sqr(r,r);
}
PAIR_line(&lv,&A,&A,Qx,Qy);
FP12_smul(r,&lv);
/* R-ate fixup */
ECP2_copy(&KA,P);
ECP2_frob(&KA,&X);
ECP2_neg(&A);
FP12_conj(r,r);
PAIR_line(&lv,&A,&KA,Qx,Qy);
FP12_smul(r,&lv);
ECP2_frob(&KA,&X);
ECP2_neg(&KA);
PAIR_line(&lv,&A,&KA,Qx,Qy);
FP12_smul(r,&lv);
}
/* final exponentiation - keep separate for multi-pairings and to avoid thrashing stack */
void PAIR_fexp(FP12 *r)
{
FP2 X;
BIG x,a,b;
FP12 t0,y0,y1,y2,y3;
BIG_rcopy(x,CURVE_Bnx);
BIG_rcopy(a,CURVE_Fra);
BIG_rcopy(b,CURVE_Frb);
FP2_from_BIGs(&X,a,b);
/* Easy part of final exp */
FP12_inv(&t0,r);
FP12_conj(r,r);
FP12_mul(r,&t0);
FP12_copy(&t0,r);
FP12_frob(r,&X);
FP12_frob(r,&X);
FP12_mul(r,&t0);
/* Hard part of final exp - see Duquesne & Ghamman eprint 2015/192.pdf */
FP12_pow(&t0,r,x); // t0=f^-u
FP12_usqr(&y3,&t0); // y3=t0^2
FP12_copy(&y0,&t0); FP12_mul(&y0,&y3); // y0=t0*y3
FP12_copy(&y2,&y3); FP12_frob(&y2,&X); // y2=y3^p
FP12_mul(&y2,&y3); //y2=y2*y3
FP12_usqr(&y2,&y2); //y2=y2^2
FP12_mul(&y2,&y3); // y2=y2*y3
FP12_pow(&t0,&y0,x); //t0=y0^-u
FP12_conj(&y0,r); //y0=~r
FP12_copy(&y1,&t0); FP12_frob(&y1,&X); FP12_frob(&y1,&X); //y1=t0^p^2
FP12_mul(&y1,&y0); // y1=y0*y1
FP12_conj(&t0,&t0); // t0=~t0
FP12_copy(&y3,&t0); FP12_frob(&y3,&X); //y3=t0^p
FP12_mul(&y3,&t0); // y3=t0*y3
FP12_usqr(&t0,&t0); // t0=t0^2
FP12_mul(&y1,&t0); // y1=t0*y1
FP12_pow(&t0,&y3,x); // t0=y3^-u
FP12_usqr(&t0,&t0); //t0=t0^2
FP12_conj(&t0,&t0); //t0=~t0
FP12_mul(&y3,&t0); // y3=t0*y3
FP12_frob(r,&X); FP12_copy(&y0,r);
FP12_frob(r,&X); FP12_mul(&y0,r);
FP12_frob(r,&X); FP12_mul(&y0,r);
FP12_usqr(r,&y3); //r=y3^2
FP12_mul(r,&y2); //r=y2*r
FP12_copy(&y3,r); FP12_mul(&y3,&y0); // y3=r*y0
FP12_mul(r,&y1); // r=r*y1
FP12_usqr(r,r); // r=r^2
FP12_mul(r,&y3); // r=r*y3
FP12_reduce(r);
/* our way */
/*
// FP12 lv,x0,x1,x2,x3,x4,x5;
FP12_copy(&lv,r);
FP12_frob(&lv,&X);
FP12_copy(&x0,&lv);
FP12_frob(&x0,&X);
FP12_mul(&lv,r);
FP12_mul(&x0,&lv);
FP12_frob(&x0,&X);
FP12_conj(&x1,r);
FP12_pow(&x4,r,x);
FP12_copy(&x3,&x4);
FP12_frob(&x3,&X);
FP12_pow(&x2,&x4,x);
FP12_conj(&x5,&x2);
FP12_pow(&lv,&x2,x);
FP12_frob(&x2,&X);
FP12_conj(r,&x2);
FP12_mul(&x4,r);
FP12_frob(&x2,&X);
FP12_copy(r,&lv);
FP12_frob(r,&X);
FP12_mul(&lv,r);
FP12_usqr(&lv,&lv);
FP12_mul(&lv,&x4);
FP12_mul(&lv,&x5);
FP12_copy(r,&x3);
FP12_mul(r,&x5);
FP12_mul(r,&lv);
FP12_mul(&lv,&x2);
FP12_usqr(r,r);
FP12_mul(r,&lv);
FP12_usqr(r,r);
FP12_copy(&lv,r);
FP12_mul(&lv,&x1);
FP12_mul(r,&x0);
FP12_usqr(&lv,&lv);
FP12_mul(r,&lv);
FP12_reduce(r); */
}
