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Gorachya
2019-03-12 23:55:34 -07:00
parent 63f7b06b78
commit 0bd6dff7b2
1 changed files with 33 additions and 7 deletions
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40
crypto/sm9/sm9_rate.c Executable file → Normal file
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@@ -2455,16 +2455,42 @@ static int fast_final_expo(fp12_t r, const fp12_t a, const BIGNUM *k, const BIGN
fp12_t t;
fp12_t t0;
if (!fp12_inv(t0, a, p, ctx)
|| !fp12_fast_expo_p1(t, a, p, ctx)
|| !fp12_mul(t, t0, t, p, ctx)
|| !fp12_copy(t0, t)
|| !fp12_fast_expo_p2(t, t, p, ctx)
|| !fp12_mul(t, t0, t, p, ctx)
|| !fp12_copy(t0, t)) {
fp12_init(t, ctx);
fp12_init(t0, ctx);
if (!fp12_copy(t, a)) {
return 0;
}
if (!fp12_copy(t0, a)) {
return 0;
}
if (!fp12_inv(t0, t, p, ctx)) {
return 0;
}
if (!fp12_fast_expo_p1(t, t, p, ctx)) {
return 0;
}
if (!fp12_mul(t, t0, t, p, ctx)) {
return 0;
}
if (!fp12_copy(t0, t)) {
return 0;
}
if(!fp12_fast_expo_p2(t, t, p, ctx)){
return 0;
}
if (!fp12_mul(t, t0, t, p, ctx)) {
return 0;
}
if (!fp12_copy(t0, t)) {
return 0;
}
n = BN_num_bits(k);
for (i = n - 2; i >= 0; i--) {
if (!fp12_sqr(t, t, p, ctx)) {