/* crypto/ec/ec_lib.c */
+/*
+ * 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
* 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->extra_data_dup_func = 0;
- ret->extra_data_free_func = 0;
- ret->extra_data_clear_free_func = 0;
+ 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;
}
if (group->meth->group_finish != 0)
group->meth->group_finish(group);
- EC_GROUP_free_extra_data(group);
+ 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_GROUP_clear_free_extra_data(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)
{
- 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);
}
int EC_GROUP_copy(EC_GROUP *dest, const EC_GROUP *src)
{
+ EC_EXTRA_DATA *d;
+
if (dest->meth->group_copy == 0)
{
ECerr(EC_F_EC_GROUP_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
if (dest == src)
return 1;
- EC_GROUP_clear_free_extra_data(dest);
- if (src->extra_data_dup_func)
+ EC_EX_DATA_free_all_data(&dest->extra_data);
+
+ for (d = src->extra_data; d != NULL; d = d->next)
{
- if (src->extra_data != NULL)
+ void *t = d->dup_func(d->data);
+
+ if (t == NULL)
+ return 0;
+ if (!EC_EX_DATA_set_data(&dest->extra_data, t, d->dup_func, d->free_func, d->clear_free_func))
+ return 0;
+ }
+
+ if (src->mont_data != NULL)
+ {
+ if (dest->mont_data == NULL)
{
- dest->extra_data = src->extra_data_dup_func(src->extra_data);
- if (dest->extra_data == NULL)
- return 0;
+ 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;
}
-
- dest->extra_data_dup_func = src->extra_data_dup_func;
- dest->extra_data_free_func = src->extra_data_free_func;
- dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
}
if (src->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
- { if (!BN_zero(&group->order)) return 0; }
+ BN_zero(group->order);
if (cofactor != NULL)
- { if (!BN_copy(&group->cofactor, cofactor)) return 0; }
+ { if (!BN_copy(group->cofactor, cofactor)) return 0; }
else
- { if (!BN_zero(&group->cofactor)) return 0; }
+ 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;
}
-EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
+const EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
{
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);
}
-void EC_GROUP_set_nid(EC_GROUP *group, int nid)
+void EC_GROUP_set_curve_name(EC_GROUP *group, int nid)
{
group->curve_name = nid;
}
-int EC_GROUP_get_nid(const EC_GROUP *group)
+int EC_GROUP_get_curve_name(const EC_GROUP *group)
{
return group->curve_name;
}
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)
{
}
-/* this has 'package' visibility */
-int EC_GROUP_set_extra_data(EC_GROUP *group, void *extra_data, void *(*extra_data_dup_func)(void *),
- void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
+int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx)
{
- if ((group->extra_data != NULL)
- || (group->extra_data_dup_func != 0)
- || (group->extra_data_free_func != 0)
- || (group->extra_data_clear_free_func != 0))
+ int r = 0;
+ BIGNUM *a1, *a2, *a3, *b1, *b2, *b3;
+ BN_CTX *ctx_new = NULL;
+
+ /* compare the field types*/
+ 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 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 1;
+
+ if (!ctx)
+ ctx_new = ctx = BN_CTX_new();
+ if (!ctx)
+ return -1;
+
+ BN_CTX_start(ctx);
+ a1 = BN_CTX_get(ctx);
+ a2 = BN_CTX_get(ctx);
+ a3 = BN_CTX_get(ctx);
+ b1 = BN_CTX_get(ctx);
+ b2 = BN_CTX_get(ctx);
+ b3 = BN_CTX_get(ctx);
+ if (!b3)
+ {
+ BN_CTX_end(ctx);
+ if (ctx_new)
+ BN_CTX_free(ctx);
+ return -1;
+ }
+
+ /* XXX This approach assumes that the external representation
+ * of curves over the same field type is the same.
+ */
+ if (!a->meth->group_get_curve(a, a1, a2, a3, ctx) ||
+ !b->meth->group_get_curve(b, b1, b2, b3, ctx))
+ r = 1;
+
+ if (r || BN_cmp(a1, b1) || BN_cmp(a2, b2) || BN_cmp(a3, b3))
+ r = 1;
+
+ /* XXX EC_POINT_cmp() assumes that the methods are equal */
+ if (r || EC_POINT_cmp(a, EC_GROUP_get0_generator(a),
+ EC_GROUP_get0_generator(b), ctx))
+ r = 1;
+
+ if (!r)
{
- ECerr(EC_F_EC_GROUP_SET_EXTRA_DATA, EC_R_SLOT_FULL);
- return 0;
+ /* compare the order and cofactor */
+ if (!EC_GROUP_get_order(a, a1, ctx) ||
+ !EC_GROUP_get_order(b, b1, ctx) ||
+ !EC_GROUP_get_cofactor(a, a2, ctx) ||
+ !EC_GROUP_get_cofactor(b, b2, ctx))
+ {
+ BN_CTX_end(ctx);
+ if (ctx_new)
+ BN_CTX_free(ctx);
+ return -1;
+ }
+ if (BN_cmp(a1, b1) || BN_cmp(a2, b2))
+ r = 1;
}
- group->extra_data = extra_data;
- group->extra_data_dup_func = extra_data_dup_func;
- group->extra_data_free_func = extra_data_free_func;
- group->extra_data_clear_free_func = extra_data_clear_free_func;
- return 1;
+ BN_CTX_end(ctx);
+ if (ctx_new)
+ BN_CTX_free(ctx);
+
+ return r;
}
/* this has 'package' visibility */
-void *EC_GROUP_get_extra_data(const EC_GROUP *group, void *(*extra_data_dup_func)(void *),
- void (*extra_data_free_func)(void *), void (*extra_data_clear_free_func)(void *))
+int EC_EX_DATA_set_data(EC_EXTRA_DATA **ex_data, void *data,
+ void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *))
{
- if ((group->extra_data_dup_func != extra_data_dup_func)
- || (group->extra_data_free_func != extra_data_free_func)
- || (group->extra_data_clear_free_func != extra_data_clear_free_func))
+ EC_EXTRA_DATA *d;
+
+ if (ex_data == NULL)
+ return 0;
+
+ for (d = *ex_data; d != NULL; d = d->next)
{
- ECerr(EC_F_EC_GROUP_GET_EXTRA_DATA, EC_R_NO_SUCH_EXTRA_DATA);
- return NULL;
+ if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func)
+ {
+ ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL);
+ return 0;
+ }
}
- return group->extra_data;
+ if (data == NULL)
+ /* no explicit entry needed */
+ return 1;
+
+ d = OPENSSL_malloc(sizeof *d);
+ if (d == NULL)
+ return 0;
+
+ d->data = data;
+ d->dup_func = dup_func;
+ d->free_func = free_func;
+ d->clear_free_func = clear_free_func;
+
+ d->next = *ex_data;
+ *ex_data = d;
+
+ return 1;
}
+/* this has 'package' visibility */
+void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *ex_data,
+ void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *))
+ {
+ const EC_EXTRA_DATA *d;
+
+ for (d = ex_data; d != NULL; d = d->next)
+ {
+ if (d->dup_func == dup_func && d->free_func == free_func && d->clear_free_func == clear_free_func)
+ return d->data;
+ }
+
+ return NULL;
+ }
+
+/* this has 'package' visibility */
+void EC_EX_DATA_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 (ex_data == NULL)
+ return;
+
+ for (p = ex_data; *p != NULL; p = &((*p)->next))
+ {
+ if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func)
+ {
+ EC_EXTRA_DATA *next = (*p)->next;
+
+ (*p)->free_func((*p)->data);
+ OPENSSL_free(*p);
+
+ *p = next;
+ return;
+ }
+ }
+ }
/* this has 'package' visibility */
-void EC_GROUP_free_extra_data(EC_GROUP *group)
+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 *))
{
- if (group->extra_data_free_func)
- group->extra_data_free_func(group->extra_data);
- group->extra_data = NULL;
- group->extra_data_dup_func = 0;
- group->extra_data_free_func = 0;
- group->extra_data_clear_free_func = 0;
+ EC_EXTRA_DATA **p;
+
+ if (ex_data == NULL)
+ return;
+
+ for (p = ex_data; *p != NULL; p = &((*p)->next))
+ {
+ if ((*p)->dup_func == dup_func && (*p)->free_func == free_func && (*p)->clear_free_func == clear_free_func)
+ {
+ EC_EXTRA_DATA *next = (*p)->next;
+
+ (*p)->clear_free_func((*p)->data);
+ OPENSSL_free(*p);
+
+ *p = next;
+ return;
+ }
+ }
}
+/* this has 'package' visibility */
+void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **ex_data)
+ {
+ EC_EXTRA_DATA *d;
+
+ if (ex_data == NULL)
+ return;
+
+ d = *ex_data;
+ while (d)
+ {
+ EC_EXTRA_DATA *next = d->next;
+
+ d->free_func(d->data);
+ OPENSSL_free(d);
+
+ d = next;
+ }
+ *ex_data = NULL;
+ }
/* this has 'package' visibility */
-void EC_GROUP_clear_free_extra_data(EC_GROUP *group)
+void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **ex_data)
{
- if (group->extra_data_clear_free_func)
- group->extra_data_clear_free_func(group->extra_data);
- else if (group->extra_data_free_func)
- group->extra_data_free_func(group->extra_data);
- group->extra_data = NULL;
- group->extra_data_dup_func = 0;
- group->extra_data_free_func = 0;
- group->extra_data_clear_free_func = 0;
+ EC_EXTRA_DATA *d;
+
+ if (ex_data == NULL)
+ return;
+
+ d = *ex_data;
+ while (d)
+ {
+ EC_EXTRA_DATA *next = d->next;
+
+ d->clear_free_func(d->data);
+ OPENSSL_free(d);
+
+ d = next;
+ }
+ *ex_data = NULL;
}
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);
- memset(point, 0, sizeof *point);
+ OPENSSL_cleanse(point, sizeof *point);
OPENSSL_free(point);
}
int EC_POINT_set_Jprojective_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx)
{
- if (group->meth->point_set_Jprojective_coordinates == 0)
+ if (group->meth->point_set_Jprojective_coordinates_GFp == 0)
{
ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_set_Jprojective_coordinates(group, point, x, y, z, ctx);
+ return group->meth->point_set_Jprojective_coordinates_GFp(group, point, x, y, z, ctx);
}
int EC_POINT_get_Jprojective_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx)
{
- if (group->meth->point_get_Jprojective_coordinates == 0)
+ if (group->meth->point_get_Jprojective_coordinates_GFp == 0)
{
ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_get_Jprojective_coordinates(group, point, x, y, z, ctx);
+ return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, y, z, ctx);
}
return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
}
-
-int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
- BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
- {
- if (group->meth->point_get_affine_coordinates == 0)
- {
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- 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_Jprojective_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
- const BIGNUM *x, const BIGNUM *y, const BIGNUM *z, BN_CTX *ctx)
- {
- if (group->meth->point_set_Jprojective_coordinates == 0)
- {
- ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_set_Jprojective_coordinates(group, point, x, y, z, ctx);
- }
-
-
-int EC_POINT_get_Jprojective_coordinates_GF2m(const EC_GROUP *group, const EC_POINT *point,
- BIGNUM *x, BIGNUM *y, BIGNUM *z, BN_CTX *ctx)
- {
- if (group->meth->point_get_Jprojective_coordinates == 0)
- {
- ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
- return 0;
- }
- if (group->meth != point->meth)
- {
- ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
- return 0;
- }
- return group->meth->point_get_Jprojective_coordinates(group, point, x, y, z, 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_GF2m(const EC_GROUP *group, const EC_POINT *point,
+int EC_POINT_get_affine_coordinates_GFp(const EC_GROUP *group, const EC_POINT *point,
BIGNUM *x, BIGNUM *y, BN_CTX *ctx)
{
if (group->meth->point_get_affine_coordinates == 0)
{
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
if (group->meth != point->meth)
{
- ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
+ ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
return group->meth->point_get_affine_coordinates(group, point, x, y, 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)
+#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)
{
- if (group->meth->oct2point == 0)
+ if (group->meth->point_get_affine_coordinates == 0)
{
- ECerr(EC_F_EC_POINT_OCT2POINT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
if (group->meth != point->meth)
{
- ECerr(EC_F_EC_POINT_OCT2POINT, EC_R_INCOMPATIBLE_OBJECTS);
+ ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->oct2point(group, point, buf, len, ctx);
+ return group->meth->point_get_affine_coordinates(group, point, x, y, 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_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_POINT_INVERT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
if (group->meth != a->meth)
{
- ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS);
+ ECerr(EC_F_EC_POINT_INVERT, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
return group->meth->invert(group, a, ctx);
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);
}
}
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 */
+ }
+
+/* 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;
+ }
projects / openssl.git / blobdiff