* Originally written by Bodo Moeller for the OpenSSL project.
*/
/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1998-2003 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
if (group->seed)
{
- memset(group->seed, 0, group->seed_len);
+ OPENSSL_cleanse(group->seed, group->seed_len);
OPENSSL_free(group->seed);
}
- memset(group, 0, sizeof *group);
+ OPENSSL_cleanse(group, sizeof *group);
OPENSSL_free(group);
}
|| (group->extra_data_free_func != extra_data_free_func)
|| (group->extra_data_clear_free_func != extra_data_clear_free_func))
{
+#if 0 /* this was an error in 0.9.7, but that does not make a lot of sense */
ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
+#endif
return NULL;
}
point->meth->point_clear_finish(point);
else if (point->meth != NULL && point->meth->point_finish != 0)
point->meth->point_finish(point);
- memset(point, 0, sizeof *point);
+ OPENSSL_cleanse(point, sizeof *point);
OPENSSL_free(point);
}
}
return group->meth->points_make_affine(group, num, points, ctx);
}
+
+
+/* Functions for point multiplication.
+ *
+ * If group->meth->mul is 0, we use the wNAF-based implementations in ec_mult.c;
+ * otherwise we dispatch through methods.
+ */
+
+int EC_POINTs_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,
+ size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx)
+ {
+ if (group->meth->mul == 0)
+ /* use default */
+ return ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);
+
+ return group->meth->mul(group, r, scalar, num, points, scalars, ctx);
+ }
+
+int EC_POINT_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *g_scalar,
+ const EC_POINT *point, const BIGNUM *p_scalar, BN_CTX *ctx)
+ {
+ /* just a convenient interface to EC_POINTs_mul() */
+
+ const EC_POINT *points[1];
+ const BIGNUM *scalars[1];
+
+ points[0] = point;
+ scalars[0] = p_scalar;
+
+ return EC_POINTs_mul(group, r, g_scalar, (point != NULL && p_scalar != NULL), points, scalars, ctx);
+ }
+
+int EC_GROUP_precompute_mult(EC_GROUP *group, BN_CTX *ctx)
+ {
+ if (group->meth->mul == 0)
+ /* use default */
+ return ec_wNAF_precompute_mult(group, ctx);
+
+ if (group->meth->precompute_mult != 0)
+ return group->meth->precompute_mult(group, ctx);
+ else
+ return 1; /* nothing to do, so report success */
+ }
+
+int EC_GROUP_have_precompute_mult(const EC_GROUP *group)
+ {
+ if (group->meth->mul == 0)
+ /* use default */
+ return ec_wNAF_have_precompute_mult(group);
+
+ if (group->meth->have_precompute_mult != 0)
+ return group->meth->have_precompute_mult(group);
+ else
+ return 0; /* cannot tell whether precomputation has been performed */
+ }