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Fix sm9_z256_point_from_uncompressed_octets bug

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Fix the issue of https://github.com/guanzhi/GmSSL/issues/1698

This might lead to Invalid curve attack.
This commit is contained in:
Zhi Guan
2024-06-18 10:03:07 +08:00
parent 572ab07824
commit 5b3c897d0e
1 changed files with 1 additions and 1 deletions
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2
src/sm9_z256.c
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@@ -3149,7 +3149,7 @@ int sm9_z256_point_from_uncompressed_octets(SM9_Z256_POINT *P, const uint8_t oct
sm9_z256_modp_to_mont(P->X, P->X); sm9_z256_modp_to_mont(P->X, P->X);
sm9_z256_from_bytes(P->Y, octets + 32 + 1); sm9_z256_from_bytes(P->Y, octets + 32 + 1);
if (sm9_z256_cmp(P->X, SM9_Z256_P) >= 0) { if (sm9_z256_cmp(P->Y, SM9_Z256_P) >= 0) {
error_print(); error_print();
return -1; return -1;
} }