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openssl add ecdsa and ec support for shim
Signed-off-by: Sinong Chen <costinchen@tencent.com>
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/* crypto/ec/ec_check.c */ | ||
/* ==================================================================== | ||
* Copyright (c) 1998-2002 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). | ||
* | ||
*/ | ||
|
||
#include "ec_lcl.h" | ||
#include <openssl/err.h> | ||
|
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int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx) | ||
{ | ||
int ret = 0; | ||
BIGNUM *order; | ||
BN_CTX *new_ctx = NULL; | ||
EC_POINT *point = NULL; | ||
|
||
if (ctx == NULL) { | ||
ctx = new_ctx = BN_CTX_new(); | ||
if (ctx == NULL) { | ||
ECerr(EC_F_EC_GROUP_CHECK, ERR_R_MALLOC_FAILURE); | ||
goto err; | ||
} | ||
} | ||
BN_CTX_start(ctx); | ||
if ((order = BN_CTX_get(ctx)) == NULL) | ||
goto err; | ||
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/* check the discriminant */ | ||
if (!EC_GROUP_check_discriminant(group, ctx)) { | ||
ECerr(EC_F_EC_GROUP_CHECK, EC_R_DISCRIMINANT_IS_ZERO); | ||
goto err; | ||
} | ||
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/* check the generator */ | ||
if (group->generator == NULL) { | ||
ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_GENERATOR); | ||
goto err; | ||
} | ||
if (EC_POINT_is_on_curve(group, group->generator, ctx) <= 0) { | ||
ECerr(EC_F_EC_GROUP_CHECK, EC_R_POINT_IS_NOT_ON_CURVE); | ||
goto err; | ||
} | ||
|
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/* check the order of the generator */ | ||
if ((point = EC_POINT_new(group)) == NULL) | ||
goto err; | ||
if (!EC_GROUP_get_order(group, order, ctx)) | ||
goto err; | ||
if (BN_is_zero(order)) { | ||
ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_ORDER); | ||
goto err; | ||
} | ||
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if (!EC_POINT_mul(group, point, order, NULL, NULL, ctx)) | ||
goto err; | ||
if (!EC_POINT_is_at_infinity(group, point)) { | ||
ECerr(EC_F_EC_GROUP_CHECK, EC_R_INVALID_GROUP_ORDER); | ||
goto err; | ||
} | ||
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ret = 1; | ||
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err: | ||
if (ctx != NULL) | ||
BN_CTX_end(ctx); | ||
if (new_ctx != NULL) | ||
BN_CTX_free(new_ctx); | ||
if (point) | ||
EC_POINT_free(point); | ||
return ret; | ||
} |
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