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Add SM9 BN curve sm9bn256v1 over GF(p)

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The recommended BN curve over 256 -bit prime field. The OID of the curve might be modified in the future.
This commit is contained in:
Zhi Guan
2018-09-13 15:58:53 +08:00
parent f303eba06b
commit e789127a9a
6 changed files with 79 additions and 29 deletions
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42
crypto/sm9/sm9_rate.c
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@@ -50,7 +50,9 @@
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/err.h>
typedef uint64_t fp_t[4];
typedef fp_t fp2_t[2];
@@ -87,9 +89,12 @@ static const int abits = {
0, };
static const int ebits = {
0, 0, 1, 0,
};
static int fp_is_zero(const fp_t a)
{
return a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0;
@@ -825,22 +830,14 @@ static void rate(fp12_t r, const point_t Q, const fp_t xP, const fp_t yP)
for (i = 0; i < sizeof(abits); i++) {
eval(g, T, T, xP, yP);
fp12_sqr(t0, f);
fp12_mul(t1, t0, g);
fp12_copy(f, t1);
point_dbl(R, T);
point_copy(T, R);
fp12_sqr_to(f);
fp12_mul_to(f, g);
point_dbl_to(T);
if (abits[i]) {
eval(g, T, Q, xP, yP);
fp12_mul(t0, f, g);
fp12_copy(f, t0);
point_add(R, T, Q);
point_copy(T, R);
fp12_mul_to(f, g);
point_add_to(T, Q);
}
}
@@ -848,16 +845,13 @@ static void rate(fp12_t r, const point_t Q, const fp_t xP, const fp_t yP)
frob_twice(Q, Q2);
eval(g, T, Q1, xP, yP);
fp12_mul(t, f, g);
fp12_copy(f, t);
fp12_mul_to(f, g);
point_add_to(T, Q1);
point_add(R, T, Q1);
point_copy(T, R);
point_neg(R, Q2);
eval(g, T, R, xP, yP);
fp12_mul(t, f, g);
fp12_copy(f, t);
point_neg_to(Q2);
eval(g, T, Q, xP, yP);
fp12_mul_to(f, g);
//point_add_to(T, Q2);
final_expo(r, f);
}