/* crypto/ec/ec_lib.c */
+/*
+ * Originally written by Bodo Moeller for the OpenSSL project.
+ */
/* ====================================================================
- * Copyright (c) 1998-2001 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
* Hudson (tjh@cryptsoft.com).
*
*/
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * Binary polynomial ECC support in OpenSSL originally developed by
+ * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
+ */
#include <string.h>
ret->extra_data_free_func = 0;
ret->extra_data_clear_free_func = 0;
- ret->nid = 0;
+ ret->generator = NULL;
+ BN_init(&ret->order);
+ BN_init(&ret->cofactor);
+
+ ret->curve_name = 0;
+ ret->asn1_flag = 0;
+ ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED;
- ret->references = 1;
+ ret->seed = NULL;
+ ret->seed_len = 0;
if (!meth->group_init(ret))
{
void EC_GROUP_free(EC_GROUP *group)
{
- int i;
+ if (!group) return;
- i = CRYPTO_add(&group->references, -1, CRYPTO_LOCK_EC);
- if (i > 0)
- return;
-
if (group->meth->group_finish != 0)
group->meth->group_finish(group);
EC_GROUP_free_extra_data(group);
+ if (group->generator != NULL)
+ EC_POINT_free(group->generator);
+ BN_free(&group->order);
+ BN_free(&group->cofactor);
+
+ if (group->seed)
+ OPENSSL_free(group->seed);
+
OPENSSL_free(group);
}
void EC_GROUP_clear_free(EC_GROUP *group)
{
- int i;
-
- i = CRYPTO_add(&group->references, -1, CRYPTO_LOCK_EC);
- if (i > 0)
- return;
+ if (!group) return;
if (group->meth->group_clear_finish != 0)
group->meth->group_clear_finish(group);
EC_GROUP_clear_free_extra_data(group);
- memset(group, 0, sizeof *group);
+ if (group->generator != NULL)
+ EC_POINT_clear_free(group->generator);
+ BN_clear_free(&group->order);
+ BN_clear_free(&group->cofactor);
+
+ if (group->seed)
+ {
+ OPENSSL_cleanse(group->seed, group->seed_len);
+ OPENSSL_free(group->seed);
+ }
+
+ OPENSSL_cleanse(group, sizeof *group);
OPENSSL_free(group);
}
dest->extra_data_clear_free_func = src->extra_data_clear_free_func;
}
+ if (src->generator != NULL)
+ {
+ if (dest->generator == NULL)
+ {
+ dest->generator = EC_POINT_new(dest);
+ if (dest->generator == NULL) return 0;
+ }
+ if (!EC_POINT_copy(dest->generator, src->generator)) return 0;
+ }
+ else
+ {
+ /* src->generator == NULL */
+ if (dest->generator != NULL)
+ {
+ EC_POINT_clear_free(dest->generator);
+ dest->generator = NULL;
+ }
+ }
+
+ 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;
+ dest->asn1_form = src->asn1_form;
+
+ if (src->seed)
+ {
+ if (dest->seed)
+ OPENSSL_free(dest->seed);
+ dest->seed = OPENSSL_malloc(src->seed_len);
+ if (dest->seed == NULL)
+ return 0;
+ if (!memcpy(dest->seed, src->seed, src->seed_len))
+ return 0;
+ dest->seed_len = src->seed_len;
+ }
+ else
+ {
+ if (dest->seed)
+ OPENSSL_free(dest->seed);
+ dest->seed = NULL;
+ dest->seed_len = 0;
+ }
+
+
return dest->meth->group_copy(dest, src);
}
+EC_GROUP *EC_GROUP_dup(const EC_GROUP *a)
+ {
+ EC_GROUP *t = NULL;
+ int ok = 0;
+
+ if (a == NULL) return NULL;
+
+ if ((t = EC_GROUP_new(a->meth)) == NULL) return(NULL);
+ if (!EC_GROUP_copy(t, a)) goto err;
+
+ ok = 1;
+
+ err:
+ if (!ok)
+ {
+ if (t) EC_GROUP_free(t);
+ return NULL;
+ }
+ else return t;
+ }
+
+
const EC_METHOD *EC_GROUP_method_of(const EC_GROUP *group)
{
return group->meth;
}
+int EC_METHOD_get_field_type(const EC_METHOD *meth)
+ {
+ return meth->field_type;
+ }
+
+
+int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
+ {
+ if (generator == NULL)
+ {
+ ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_PASSED_NULL_PARAMETER);
+ return 0 ;
+ }
+
+ if (group->generator == NULL)
+ {
+ group->generator = EC_POINT_new(group);
+ if (group->generator == NULL) return 0;
+ }
+ if (!EC_POINT_copy(group->generator, generator)) return 0;
+
+ if (order != NULL)
+ { if (!BN_copy(&group->order, order)) return 0; }
+ else
+ { if (!BN_zero(&group->order)) return 0; }
+
+ if (cofactor != NULL)
+ { if (!BN_copy(&group->cofactor, cofactor)) return 0; }
+ else
+ { if (!BN_zero(&group->cofactor)) return 0; }
+
+ return 1;
+ }
+
+
+EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
+ {
+ return group->generator;
+ }
+
+
+int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
+ {
+ 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))
+ return 0;
+
+ return !BN_is_zero(&group->cofactor);
+ }
+
+
+void EC_GROUP_set_nid(EC_GROUP *group, int nid)
+ {
+ group->curve_name = nid;
+ }
+
+
+int EC_GROUP_get_nid(const EC_GROUP *group)
+ {
+ return group->curve_name;
+ }
+
+
+void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag)
+ {
+ group->asn1_flag = flag;
+ }
+
+
+int EC_GROUP_get_asn1_flag(const EC_GROUP *group)
+ {
+ return group->asn1_flag;
+ }
+
+
+void EC_GROUP_set_point_conversion_form(EC_GROUP *group,
+ point_conversion_form_t form)
+ {
+ group->asn1_form = form;
+ }
+
+
+point_conversion_form_t EC_GROUP_get_point_conversion_form(const EC_GROUP *group)
+ {
+ return group->asn1_form;
+ }
+
+
+size_t EC_GROUP_set_seed(EC_GROUP *group, const unsigned char *p, size_t len)
+ {
+ if (group->seed)
+ {
+ OPENSSL_free(group->seed);
+ group->seed = NULL;
+ group->seed_len = 0;
+ }
+
+ if (!len || !p)
+ return 1;
+
+ if ((group->seed = OPENSSL_malloc(len)) == NULL)
+ return 0;
+ memcpy(group->seed, p, len);
+ group->seed_len = len;
+
+ return len;
+ }
+
+
+unsigned char *EC_GROUP_get0_seed(const EC_GROUP *group)
+ {
+ return group->seed;
+ }
+
+
+size_t EC_GROUP_get_seed_len(const EC_GROUP *group)
+ {
+ return group->seed_len;
+ }
+
+
int EC_GROUP_set_curve_GFp(EC_GROUP *group, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
{
- if (group->meth->group_set_curve_GFp == 0)
+ if (group->meth->group_set_curve == 0)
{
ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
- return group->meth->group_set_curve_GFp(group, p, a, b, ctx);
+ return group->meth->group_set_curve(group, p, a, b, ctx);
}
int EC_GROUP_get_curve_GFp(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
{
- if (group->meth->group_get_curve_GFp == 0)
+ if (group->meth->group_get_curve == 0)
{
ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
- return group->meth->group_get_curve_GFp(group, p, a, b, ctx);
+ return group->meth->group_get_curve(group, p, a, b, ctx);
}
-int EC_GROUP_set_generator(EC_GROUP *group, const EC_POINT *generator, const BIGNUM *order, const BIGNUM *cofactor)
+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_generator == 0)
+ if (group->meth->group_set_curve == 0)
{
- ECerr(EC_F_EC_GROUP_SET_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
- return group->meth->group_set_generator(group, generator, order, cofactor);
+ return group->meth->group_set_curve(group, p, a, b, ctx);
}
-EC_POINT *EC_GROUP_get0_generator(const EC_GROUP *group)
+int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *ctx)
{
- if (group->meth->group_get0_generator == 0)
+ if (group->meth->group_get_curve == 0)
{
- ECerr(EC_F_EC_GROUP_GET0_GENERATOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
- return group->meth->group_get0_generator(group);
+ return group->meth->group_get_curve(group, p, a, b, ctx);
}
-int EC_GROUP_get_order(const EC_GROUP *group, BIGNUM *order, BN_CTX *ctx)
+int EC_GROUP_get_degree(const EC_GROUP *group)
{
- if (group->meth->group_get_order == 0)
+ if (group->meth->group_get_degree == 0)
{
- ECerr(EC_F_EC_GROUP_GET_ORDER, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
- return group->meth->group_get_order(group, order, ctx);
+ return group->meth->group_get_degree(group);
}
-int EC_GROUP_get_cofactor(const EC_GROUP *group, BIGNUM *cofactor, BN_CTX *ctx)
+int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx)
{
- if (group->meth->group_get_cofactor == 0)
+ if (group->meth->group_check_discriminant == 0)
{
- ECerr(EC_F_EC_GROUP_GET_COFACTOR, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
}
- return group->meth->group_get_cofactor(group, cofactor, ctx);
+ return group->meth->group_check_discriminant(group, ctx);
}
|| (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;
}
group->extra_data_clear_free_func = 0;
}
-void EC_GROUP_set_nid(EC_GROUP *group, int nid)
-{
- group->nid = nid;
-}
-
-int EC_GROUP_get_nid(const EC_GROUP *group)
-{
- return group->nid;
-}
-
-
/* functions for EC_POINT objects */
void EC_POINT_free(EC_POINT *point)
{
+ if (!point) return;
+
if (point->meth->point_finish != 0)
point->meth->point_finish(point);
OPENSSL_free(point);
void EC_POINT_clear_free(EC_POINT *point)
{
+ if (!point) return;
+
if (point->meth->point_clear_finish != 0)
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);
}
}
+EC_POINT *EC_POINT_dup(const EC_POINT *a, const EC_GROUP *group)
+ {
+ EC_POINT *t;
+ int r;
+
+ if (a == NULL) return NULL;
+
+ t = EC_POINT_new(group);
+ if (t == NULL) return(NULL);
+ r = EC_POINT_copy(t, a);
+ if (!r)
+ {
+ EC_POINT_free(t);
+ return NULL;
+ }
+ else return t;
+ }
+
+
const EC_METHOD *EC_POINT_method_of(const EC_POINT *point)
{
return point->meth;
int EC_POINT_set_affine_coordinates_GFp(const EC_GROUP *group, EC_POINT *point,
const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
{
- if (group->meth->point_set_affine_coordinates_GFp == 0)
+ if (group->meth->point_set_affine_coordinates == 0)
{
ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return 0;
ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_set_affine_coordinates_GFp(group, point, x, y, ctx);
+ return group->meth->point_set_affine_coordinates(group, point, x, y, ctx);
+ }
+
+
+int EC_POINT_set_affine_coordinates_GF2m(const EC_GROUP *group, EC_POINT *point,
+ const BIGNUM *x, const BIGNUM *y, BN_CTX *ctx)
+ {
+ if (group->meth->point_set_affine_coordinates == 0)
+ {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ return 0;
+ }
+ if (group->meth != point->meth)
+ {
+ ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GF2M, EC_R_INCOMPATIBLE_OBJECTS);
+ return 0;
+ }
+ 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_GFp == 0)
+ 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;
ECerr(EC_F_EC_POINT_GET_AFFINE_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_get_affine_coordinates_GFp(group, point, x, y, ctx);
+ return group->meth->point_get_affine_coordinates(group, point, x, y, ctx);
+ }
+
+
+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->point_get_affine_coordinates == 0)
+ {
+ 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_GET_AFFINE_COORDINATES_GF2M, 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_GFp == 0)
+ 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;
ECerr(EC_F_EC_POINT_SET_COMPRESSED_COORDINATES_GFP, EC_R_INCOMPATIBLE_OBJECTS);
return 0;
}
- return group->meth->point_set_compressed_coordinates_GFp(group, point, x, y_bit, ctx);
+ 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);
}
}
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 */
+ }
projects / openssl.git / blobdiff