* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
*/
+
+
#include <string.h>
#include <openssl/err.h>
#include "ec_lcl.h"
-static const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
+const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT;
/* functions for EC_GROUP objects */
if (meth == NULL)
{
- ECerr(EC_F_EC_GROUP_NEW, ERR_R_PASSED_NULL_PARAMETER);
+ ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL);
return NULL;
}
if (meth->group_init == 0)
ret->meth = meth;
ret->extra_data = NULL;
+ ret->mont_data = NULL;
ret->generator = NULL;
- BN_init(&ret->order);
- BN_init(&ret->cofactor);
+ ret->order = BN_new();
+ ret->cofactor = NULL;
+ if(!ret->order) goto err;
+ ret->cofactor = BN_new();
+ if(!ret->cofactor) goto err;
ret->curve_name = 0;
ret->asn1_flag = 0;
ret->seed = NULL;
ret->seed_len = 0;
- if (!meth->group_init(ret))
- {
- OPENSSL_free(ret);
- return NULL;
- }
+ if (!meth->group_init(ret)) goto err;
return ret;
+err:
+ if(ret->order) BN_free(ret->order);
+ if(ret->cofactor) BN_free(ret->cofactor);
+ OPENSSL_free(ret);
+ return NULL;
}
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);
- BN_free(&group->cofactor);
+ BN_free(group->order);
+ BN_free(group->cofactor);
if (group->seed)
OPENSSL_free(group->seed);
if (group->meth->group_clear_finish != 0)
group->meth->group_clear_finish(group);
- else if (group->meth != NULL && group->meth->group_finish != 0)
+ else if (group->meth->group_finish != 0)
group->meth->group_finish(group);
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);
- BN_clear_free(&group->cofactor);
+ BN_clear_free(group->order);
+ BN_clear_free(group->cofactor);
if (group->seed)
{
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)
}
}
- if (!BN_copy(&dest->order, &src->order)) return 0;
- if (!BN_copy(&dest->cofactor, &src->cofactor)) return 0;
+ if (!BN_copy(dest->order, src->order)) return 0;
+ if (!BN_copy(dest->cofactor, src->cofactor)) return 0;
dest->curve_name = src->curve_name;
dest->asn1_flag = src->asn1_flag;
if (!EC_POINT_copy(group->generator, generator)) return 0;
if (order != NULL)
- { if (!BN_copy(&group->order, order)) return 0; }
+ { if (!BN_copy(group->order, order)) return 0; }
else
- BN_zero(&group->order);
+ BN_zero(group->order);
if (cofactor != NULL)
- { if (!BN_copy(&group->cofactor, cofactor)) return 0; }
+ { if (!BN_copy(group->cofactor, cofactor)) return 0; }
else
- BN_zero(&group->cofactor);
+ 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)
{
- if (!BN_copy(order, &group->order))
+ if (!BN_copy(order, group->order))
return 0;
return !BN_is_zero(order);
int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx)
{
- if (!BN_copy(cofactor, &group->cofactor))
+ if (!BN_copy(cofactor, group->cofactor))
return 0;
- return !BN_is_zero(&group->cofactor);
+ return !BN_is_zero(group->cofactor);
}
return group->meth->group_get_curve(group, p, a, b, ctx);
}
-
+#ifndef OPENSSL_NO_EC2M
int EC_GROUP_set_curve_GF2m(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
{
if (group->meth->group_set_curve == 0)
}
return group->meth->group_get_curve(group, p, a, b, ctx);
}
-
+#endif
int EC_GROUP_get_degree(const EC_GROUP *group)
{
if (EC_METHOD_get_field_type(EC_GROUP_method_of(a)) !=
EC_METHOD_get_field_type(EC_GROUP_method_of(b)))
return 1;
- /* compare the curve name (if present) */
+ /* compare the curve name (if present in both) */
if (EC_GROUP_get_curve_name(a) && EC_GROUP_get_curve_name(b) &&
- EC_GROUP_get_curve_name(a) == EC_GROUP_get_curve_name(b))
- return 0;
+ EC_GROUP_get_curve_name(a) != EC_GROUP_get_curve_name(b))
+ return 1;
if (!ctx)
ctx_new = ctx = BN_CTX_new();
{
if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func)
{
- ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
+ ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL);
return 0;
}
}
}
/* this has 'package' visibility */
-void EC_EX_DATA_clear_free_extra_data(EC_EXTRA_DATA **ex_data,
+void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **ex_data,
void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *))
{
EC_EXTRA_DATA **p;
if (point->meth->point_clear_finish != 0)
point->meth->point_clear_finish(point);
- else if (point->meth != NULL && point->meth->point_finish != 0)
+ else if (point->meth->point_finish != 0)
point->meth->point_finish(point);
OPENSSL_cleanse(point, sizeof *point);
OPENSSL_free(point);
return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
}
-
+#ifndef OPENSSL_NO_EC2M
int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
{
}
return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
}
-
+#endif
int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
}
-
+#ifndef OPENSSL_NO_EC2M
int EC_POINT_get_affine_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point,
BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
{
}
return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
}
-
-
-int EC_POINT_set_compressed_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
- const BIGNUM *x, int y_bit, BN_CTX *ctx)
- {
- if (group->meth->point_set_compressed_coordinates == 0)
- {
- ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx);
- }
-
-
-int EC_POINT_set_compressed_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
- const BIGNUM *x, int y_bit, BN_CTX *ctx)
- {
- if (group->meth->point_set_compressed_coordinates == 0)
- {
- ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_compressed_coordinates(group, point, x, y_bit, ctx);
- }
-
-
-size_t EC_POINT_point2oct(const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form,
- unsigned char *buf, size_t len, BN_CTX *ctx)
- {
- if (group->meth->point2oct == 0)
- {
- ECerr(EC_F_EC_POINT_POINT2OCT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_POINT2OCT, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point2oct(group, point, form, buf, len, ctx);
- }
-
-
-int EC_POINT_oct2point(const EC_GROUP *group, EC_POINT *point,
- const unsigned char *buf, size_t len, BN_CTX *ctx)
- {
- if (group->meth->oct2point == 0)
- {
- ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->oct2point(group, point, buf, len, ctx);
- }
-
+#endif
int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, const EC_POINT *b, 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;
if (group->meth->point_cmp == 0)
{
ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
+ return -1;
}
if ((group->meth != a->meth) || (a->meth != b->meth))
{
ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
+ return -1;
}
return group->meth->point_cmp(group, a, b, ctx);
}
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;
+ }
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