70 static void p1p1_to_p2(ge25519_p2 *r, const ge25519_p1p1 *p)  in p1p1_to_p2()  argument
72   fe25519_mul(&r->x, &p->x, &p->t);  in p1p1_to_p2()
73   fe25519_mul(&r->y, &p->y, &p->z);  in p1p1_to_p2()
74   fe25519_mul(&r->z, &p->z, &p->t);  in p1p1_to_p2()
77 static void p1p1_to_p3(ge25519_p3 *r, const ge25519_p1p1 *p)  in p1p1_to_p3()  argument
79   p1p1_to_p2((ge25519_p2 *)r, p);  in p1p1_to_p3()
80   fe25519_mul(&r->t, &p->x, &p->y);  in p1p1_to_p3()
106 static void add_p1p1(ge25519_p1p1 *r, const ge25519_p3 *p, const ge25519_p3 *q)  in add_p1p1()  argument
110   fe25519_sub(&a, &p->y, &p->x); /* A = (Y1-X1)*(Y2-X2) */  in add_p1p1()
113   fe25519_add(&b, &p->x, &p->y); /* B = (Y1+X1)*(Y2+X2) */  in add_p1p1()
116   fe25519_mul(&c, &p->t, &q->t); /* C = T1*k*T2 */  in add_p1p1()
118   fe25519_mul(&d, &p->z, &q->z); /* D = Z1*2*Z2 */  in add_p1p1()
127 static void dbl_p1p1(ge25519_p1p1 *r, const ge25519_p2 *p)  in dbl_p1p1()  argument
130   fe25519_square(&a, &p->x);  in dbl_p1p1()
131   fe25519_square(&b, &p->y);  in dbl_p1p1()
132   fe25519_square(&c, &p->z);  in dbl_p1p1()
136   fe25519_add(&r->x, &p->x, &p->y);  in dbl_p1p1()
146 static void cmov_aff(ge25519_aff *r, const ge25519_aff *p, unsigned char b)  in cmov_aff()  argument
148   fe25519_cmov(&r->x, &p->x, b);  in cmov_aff()
149   fe25519_cmov(&r->y, &p->y, b);  in cmov_aff()
196 int ge25519_unpackneg_vartime(ge25519_p3 *r, const unsigned char p[32])  in ge25519_unpackneg_vartime()
201   par = p[31] >> 7;  in ge25519_unpackneg_vartime()
202   fe25519_unpack(&r->y, p);   in ge25519_unpackneg_vartime()
243 void ge25519_pack(unsigned char r[32], const ge25519_p3 *p)  in ge25519_pack()  argument
246   fe25519_invert(&zi, &p->z);   in ge25519_pack()
247   fe25519_mul(&tx, &p->x, &zi);  in ge25519_pack()
248   fe25519_mul(&ty, &p->y, &zi);  in ge25519_pack()
253 int ge25519_isneutral_vartime(const ge25519_p3 *p)  in ge25519_isneutral_vartime()  argument
256   if(!fe25519_iszero(&p->x)) ret = 0;  in ge25519_isneutral_vartime()
257   if(!fe25519_iseq_vartime(&p->y, &p->z)) ret = 0;  in ge25519_isneutral_vartime()
265   ge25519_p3 pre[16];  in ge25519_double_scalarmult_vartime()  local
270   setneutral(pre);                                                      /* 00 00 */  in ge25519_double_scalarmult_vartime()
271   pre[1] = *p1;                                                         /* 00 01 */  in ge25519_double_scalarmult_vartime()
272   dbl_p1p1(&tp1p1,(ge25519_p2 *)p1);      p1p1_to_p3( &pre[2], &tp1p1); /* 00 10 */  in ge25519_double_scalarmult_vartime()
273   add_p1p1(&tp1p1,&pre[1], &pre[2]);      p1p1_to_p3( &pre[3], &tp1p1); /* 00 11 */  in ge25519_double_scalarmult_vartime()
274   pre[4] = *p2;                                                         /* 01 00 */  in ge25519_double_scalarmult_vartime()
275   add_p1p1(&tp1p1,&pre[1], &pre[4]);      p1p1_to_p3( &pre[5], &tp1p1); /* 01 01 */  in ge25519_double_scalarmult_vartime()
276   add_p1p1(&tp1p1,&pre[2], &pre[4]);      p1p1_to_p3( &pre[6], &tp1p1); /* 01 10 */  in ge25519_double_scalarmult_vartime()
277   add_p1p1(&tp1p1,&pre[3], &pre[4]);      p1p1_to_p3( &pre[7], &tp1p1); /* 01 11 */  in ge25519_double_scalarmult_vartime()
278   dbl_p1p1(&tp1p1,(ge25519_p2 *)p2);      p1p1_to_p3( &pre[8], &tp1p1); /* 10 00 */  in ge25519_double_scalarmult_vartime()
279   add_p1p1(&tp1p1,&pre[1], &pre[8]);      p1p1_to_p3( &pre[9], &tp1p1); /* 10 01 */  in ge25519_double_scalarmult_vartime()
280   dbl_p1p1(&tp1p1,(ge25519_p2 *)&pre[5]); p1p1_to_p3(&pre[10], &tp1p1); /* 10 10 */  in ge25519_double_scalarmult_vartime()
281   add_p1p1(&tp1p1,&pre[3], &pre[8]);      p1p1_to_p3(&pre[11], &tp1p1); /* 10 11 */  in ge25519_double_scalarmult_vartime()
282   add_p1p1(&tp1p1,&pre[4], &pre[8]);      p1p1_to_p3(&pre[12], &tp1p1); /* 11 00 */  in ge25519_double_scalarmult_vartime()
283   add_p1p1(&tp1p1,&pre[1],&pre[12]);      p1p1_to_p3(&pre[13], &tp1p1); /* 11 01 */  in ge25519_double_scalarmult_vartime()
284   add_p1p1(&tp1p1,&pre[2],&pre[12]);      p1p1_to_p3(&pre[14], &tp1p1); /* 11 10 */  in ge25519_double_scalarmult_vartime()
285   add_p1p1(&tp1p1,&pre[3],&pre[12]);      p1p1_to_p3(&pre[15], &tp1p1); /* 11 11 */  in ge25519_double_scalarmult_vartime()
290   *r = pre[b[126]];  in ge25519_double_scalarmult_vartime()
299       add_p1p1(&tp1p1, r, &pre[b[i]]);  in ge25519_double_scalarmult_vartime()