#include "ec_lcl.h"
-__fips_constseg
static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
ret->meth = meth;
ret->extra_data = NULL;
+ ret->mont_data = NULL;
ret->generator = NULL;
BN_init(&ret->order);
EC_EX_DATA_free_all_data(&group->extra_data);
+ if (group->mont_data)
+ BN_MONT_CTX_free(group->mont_data);
+
if (group->generator != NULL)
EC_POINT_free(group->generator);
BN_free(&group->order);
EC_EX_DATA_clear_free_all_data(&group->extra_data);
+ if (group->mont_data)
+ BN_MONT_CTX_free(group->mont_data);
+
if (group->generator != NULL)
EC_POINT_clear_free(group->generator);
BN_clear_free(&group->order);
return 0;
}
+ if (src->mont_data != NULL)
+ {
+ if (dest->mont_data == NULL)
+ {
+ dest->mont_data = BN_MONT_CTX_new();
+ if (dest->mont_data == NULL) return 0;
+ }
+ if (!BN_MONT_CTX_copy(dest->mont_data, src->mont_data)) return 0;
+ }
+ else
+ {
+ /* src->generator == NULL */
+ if (dest->mont_data != NULL)
+ {
+ BN_MONT_CTX_free(dest->mont_data);
+ dest->mont_data = NULL;
+ }
+ }
+
if (src->generator != NULL)
{
if (dest->generator == NULL)
else
BN_zero(&group->cofactor);
+ /* We ignore the return value because some groups have an order with
+ * factors of two, which makes the Montgomery setup fail.
+ * |group->mont_data| will be NULL in this case. */
+ ec_precompute_mont_data(group);
+
return 1;
}
return group->generator;
}
+BN_MONT_CTX *EC_GROUP_get_mont_data(const EC_GROUP *group)
+ {
+ return group->mont_data;
+ }
int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
{
int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx)
{
- if (group->meth->dbl == 0)
+ if (group->meth->invert == 0)
{
ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
else
return 0; /* cannot tell whether precomputation has been performed */
}
+
+/* ec_precompute_mont_data sets |group->mont_data| from |group->order| and
+ * returns one on success. On error it returns zero. */
+int ec_precompute_mont_data(EC_GROUP *group)
+ {
+ BN_CTX *ctx = BN_CTX_new();
+ int ret = 0;
+
+ if (group->mont_data)
+ {
+ BN_MONT_CTX_free(group->mont_data);
+ group->mont_data = NULL;
+ }
+
+ if (ctx == NULL)
+ goto err;
+
+ group->mont_data = BN_MONT_CTX_new();
+ if (!group->mont_data)
+ goto err;
+
+ if (!BN_MONT_CTX_set(group->mont_data, &group->order, ctx))
+ {
+ BN_MONT_CTX_free(group->mont_data);
+ group->mont_data = NULL;
+ goto err;
+ }
+
+ ret = 1;
+
+err:
+
+ if (ctx)
+ BN_CTX_free(ctx);
+ return ret;
+ }