diff options
Diffstat (limited to 'thirdparty/openssl/crypto/ec/ec_lib.c')
| -rw-r--r-- | thirdparty/openssl/crypto/ec/ec_lib.c | 1134 |
1 files changed, 1134 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/ec/ec_lib.c b/thirdparty/openssl/crypto/ec/ec_lib.c new file mode 100644 index 0000000000..3ffa112cc3 --- /dev/null +++ b/thirdparty/openssl/crypto/ec/ec_lib.c @@ -0,0 +1,1134 @@ +/* crypto/ec/ec_lib.c */ +/* + * Originally written by Bodo Moeller for the OpenSSL project. + */ +/* ==================================================================== + * 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 + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * 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> + +#include <openssl/err.h> +#include <openssl/opensslv.h> + +#include "ec_lcl.h" + +const char EC_version[] = "EC" OPENSSL_VERSION_PTEXT; + +/* functions for EC_GROUP objects */ + +EC_GROUP *EC_GROUP_new(const EC_METHOD *meth) +{ + EC_GROUP *ret; + + if (meth == NULL) { + ECerr(EC_F_EC_GROUP_NEW, EC_R_SLOT_FULL); + return NULL; + } + if (meth->group_init == 0) { + ECerr(EC_F_EC_GROUP_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return NULL; + } + + ret = OPENSSL_malloc(sizeof *ret); + if (ret == NULL) { + ECerr(EC_F_EC_GROUP_NEW, ERR_R_MALLOC_FAILURE); + return NULL; + } + + ret->meth = meth; + + ret->extra_data = NULL; + ret->mont_data = NULL; + + ret->generator = NULL; + BN_init(&ret->order); + BN_init(&ret->cofactor); + + ret->curve_name = 0; + ret->asn1_flag = ~EC_GROUP_ASN1_FLAG_MASK; + ret->asn1_form = POINT_CONVERSION_UNCOMPRESSED; + + ret->seed = NULL; + ret->seed_len = 0; + + if (!meth->group_init(ret)) { + OPENSSL_free(ret); + return NULL; + } + + return ret; +} + +void EC_GROUP_free(EC_GROUP *group) +{ + if (!group) + return; + + if (group->meth->group_finish != 0) + group->meth->group_finish(group); + + EC_EX_DATA_free_all_data(&group->extra_data); + + if (EC_GROUP_VERSION(group) && 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); + + if (group->seed) + OPENSSL_free(group->seed); + + OPENSSL_free(group); +} + +void EC_GROUP_clear_free(EC_GROUP *group) +{ + if (!group) + return; + + if (group->meth->group_clear_finish != 0) + group->meth->group_clear_finish(group); + else if (group->meth->group_finish != 0) + group->meth->group_finish(group); + + EC_EX_DATA_clear_free_all_data(&group->extra_data); + + if (EC_GROUP_VERSION(group) && 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); + + if (group->seed) { + OPENSSL_cleanse(group->seed, group->seed_len); + OPENSSL_free(group->seed); + } + + 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); + return 0; + } + if (dest->meth != src->meth) { + ECerr(EC_F_EC_GROUP_COPY, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + if (dest == src) + return 1; + + EC_EX_DATA_free_all_data(&dest->extra_data); + + for (d = src->extra_data; d != NULL; d = d->next) { + 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 (EC_GROUP_VERSION(src) && 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 (EC_GROUP_VERSION(dest) && dest->mont_data != NULL) { + BN_MONT_CTX_free(dest->mont_data); + dest->mont_data = NULL; + } + } + + 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 + BN_zero(&group->order); + + if (cofactor != NULL) { + if (!BN_copy(&group->cofactor, cofactor)) + return 0; + } 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; +} + +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 EC_GROUP_VERSION(group) ? group->mont_data : NULL; +} + +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_curve_name(EC_GROUP *group, int nid) +{ + group->curve_name = nid; +} + +int EC_GROUP_get_curve_name(const EC_GROUP *group) +{ + return group->curve_name; +} + +void EC_GROUP_set_asn1_flag(EC_GROUP *group, int flag) +{ + group->asn1_flag &= ~EC_GROUP_ASN1_FLAG_MASK; + group->asn1_flag |= flag & EC_GROUP_ASN1_FLAG_MASK; +} + +int EC_GROUP_get_asn1_flag(const EC_GROUP *group) +{ + return group->asn1_flag & EC_GROUP_ASN1_FLAG_MASK; +} + +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 == 0) { + ECerr(EC_F_EC_GROUP_SET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + 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 == 0) { + ECerr(EC_F_EC_GROUP_GET_CURVE_GFP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + 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) { + ECerr(EC_F_EC_GROUP_SET_CURVE_GF2M, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + return group->meth->group_set_curve(group, p, a, b, ctx); +} + +int EC_GROUP_get_curve_GF2m(const EC_GROUP *group, BIGNUM *p, BIGNUM *a, + BIGNUM *b, BN_CTX *ctx) +{ + if (group->meth->group_get_curve == 0) { + ECerr(EC_F_EC_GROUP_GET_CURVE_GF2M, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + return group->meth->group_get_curve(group, p, a, b, ctx); +} +#endif + +int EC_GROUP_get_degree(const EC_GROUP *group) +{ + if (group->meth->group_get_degree == 0) { + ECerr(EC_F_EC_GROUP_GET_DEGREE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + return group->meth->group_get_degree(group); +} + +int EC_GROUP_check_discriminant(const EC_GROUP *group, BN_CTX *ctx) +{ + if (group->meth->group_check_discriminant == 0) { + ECerr(EC_F_EC_GROUP_CHECK_DISCRIMINANT, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + return group->meth->group_check_discriminant(group, ctx); +} + +int EC_GROUP_cmp(const EC_GROUP *a, const EC_GROUP *b, BN_CTX *ctx) +{ + 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) { + /* 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; + } + + BN_CTX_end(ctx); + if (ctx_new) + BN_CTX_free(ctx); + + return r; +} + +/* this has 'package' visibility */ +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 *)) +{ + EC_EXTRA_DATA *d; + + if (ex_data == NULL) + return 0; + + 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) { + ECerr(EC_F_EC_EX_DATA_SET_DATA, EC_R_SLOT_FULL); + return 0; + } + } + + 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_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 (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_EX_DATA_clear_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->clear_free_func(d->data); + OPENSSL_free(d); + + d = next; + } + *ex_data = NULL; +} + +/* functions for EC_POINT objects */ + +EC_POINT *EC_POINT_new(const EC_GROUP *group) +{ + EC_POINT *ret; + + if (group == NULL) { + ECerr(EC_F_EC_POINT_NEW, ERR_R_PASSED_NULL_PARAMETER); + return NULL; + } + if (group->meth->point_init == 0) { + ECerr(EC_F_EC_POINT_NEW, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return NULL; + } + + ret = OPENSSL_malloc(sizeof *ret); + if (ret == NULL) { + ECerr(EC_F_EC_POINT_NEW, ERR_R_MALLOC_FAILURE); + return NULL; + } + + ret->meth = group->meth; + + if (!ret->meth->point_init(ret)) { + OPENSSL_free(ret); + return NULL; + } + + return ret; +} + +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->point_finish != 0) + point->meth->point_finish(point); + OPENSSL_cleanse(point, sizeof *point); + OPENSSL_free(point); +} + +int EC_POINT_copy(EC_POINT *dest, const EC_POINT *src) +{ + if (dest->meth->point_copy == 0) { + ECerr(EC_F_EC_POINT_COPY, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (dest->meth != src->meth) { + ECerr(EC_F_EC_POINT_COPY, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + if (dest == src) + return 1; + return dest->meth->point_copy(dest, src); +} + +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_to_infinity(const EC_GROUP *group, EC_POINT *point) +{ + if (group->meth->point_set_to_infinity == 0) { + ECerr(EC_F_EC_POINT_SET_TO_INFINITY, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_SET_TO_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->point_set_to_infinity(group, 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_GFp == 0) { + ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_SET_JPROJECTIVE_COORDINATES_GFP, + EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + 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_GFp == 0) { + ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_GET_JPROJECTIVE_COORDINATES_GFP, + EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->point_get_Jprojective_coordinates_GFp(group, point, x, + y, z, ctx); +} + +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 == 0) { + ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_SET_AFFINE_COORDINATES_GFP, + EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + 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) +{ + 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); +} +#endif + +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); +} + +#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->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); +} +#endif + +int EC_POINT_add(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, + const EC_POINT *b, BN_CTX *ctx) +{ + if (group->meth->add == 0) { + ECerr(EC_F_EC_POINT_ADD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if ((group->meth != r->meth) || (r->meth != a->meth) + || (a->meth != b->meth)) { + ECerr(EC_F_EC_POINT_ADD, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->add(group, r, a, b, ctx); +} + +int EC_POINT_dbl(const EC_GROUP *group, EC_POINT *r, const EC_POINT *a, + BN_CTX *ctx) +{ + if (group->meth->dbl == 0) { + ECerr(EC_F_EC_POINT_DBL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if ((group->meth != r->meth) || (r->meth != a->meth)) { + ECerr(EC_F_EC_POINT_DBL, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->dbl(group, r, a, ctx); +} + +int EC_POINT_invert(const EC_GROUP *group, EC_POINT *a, BN_CTX *ctx) +{ + if (group->meth->invert == 0) { + 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_INVERT, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->invert(group, a, ctx); +} + +int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point) +{ + if (group->meth->is_at_infinity == 0) { + ECerr(EC_F_EC_POINT_IS_AT_INFINITY, + ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_IS_AT_INFINITY, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->is_at_infinity(group, point); +} + +/* + * Check whether an EC_POINT is on the curve or not. Note that the return + * value for this function should NOT be treated as a boolean. Return values: + * 1: The point is on the curve + * 0: The point is not on the curve + * -1: An error occurred + */ +int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point, + BN_CTX *ctx) +{ + if (group->meth->is_on_curve == 0) { + ECerr(EC_F_EC_POINT_IS_ON_CURVE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_IS_ON_CURVE, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->is_on_curve(group, point, ctx); +} + +int EC_POINT_cmp(const EC_GROUP *group, const EC_POINT *a, const EC_POINT *b, + BN_CTX *ctx) +{ + if (group->meth->point_cmp == 0) { + ECerr(EC_F_EC_POINT_CMP, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return -1; + } + if ((group->meth != a->meth) || (a->meth != b->meth)) { + ECerr(EC_F_EC_POINT_CMP, EC_R_INCOMPATIBLE_OBJECTS); + return -1; + } + return group->meth->point_cmp(group, a, b, ctx); +} + +int EC_POINT_make_affine(const EC_GROUP *group, EC_POINT *point, BN_CTX *ctx) +{ + if (group->meth->make_affine == 0) { + ECerr(EC_F_EC_POINT_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + if (group->meth != point->meth) { + ECerr(EC_F_EC_POINT_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + return group->meth->make_affine(group, point, ctx); +} + +int EC_POINTs_make_affine(const EC_GROUP *group, size_t num, + EC_POINT *points[], BN_CTX *ctx) +{ + size_t i; + + if (group->meth->points_make_affine == 0) { + ECerr(EC_F_EC_POINTS_MAKE_AFFINE, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); + return 0; + } + for (i = 0; i < num; i++) { + if (group->meth != points[i]->meth) { + ECerr(EC_F_EC_POINTS_MAKE_AFFINE, EC_R_INCOMPATIBLE_OBJECTS); + return 0; + } + } + 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 (!EC_GROUP_VERSION(group)) + goto err; + + 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; +} |