SM2国密标准

static int sm2_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kp, BIGNUM **rp) { BN_CTX *ctx = NULL; BIGNUM *k = NULL, *r = NULL, *order = NULL, *X = NULL; EC_POINT *tmp_point=NULL; const EC_GROUP *group; int ret = 0; if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL)