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Current Path: /usr/src/crypto/openssl/crypto/ec

usr / src / crypto / openssl / crypto / ec /

📁 ..
📁 asm
📄 build.info(1.9 KB)
📄 curve25519.c(196.91 KB)
📁 curve448
📄 ec2_oct.c(9.54 KB)
📄 ec2_smpl.c(26.61 KB)
📄 ec_ameth.c(25.42 KB)
📄 ec_asn1.c(39.39 KB)
📄 ec_check.c(1.89 KB)
📄 ec_curve.c(138.45 KB)
📄 ec_cvt.c(2.64 KB)
📄 ec_err.c(21.19 KB)
📄 ec_key.c(18.77 KB)
📄 ec_kmeth.c(10.35 KB)
📄 ec_lib.c(33.27 KB)
📄 ec_local.h(34.19 KB)
📄 ec_mult.c(30.58 KB)
📄 ec_oct.c(5.09 KB)
📄 ec_pmeth.c(12.34 KB)
📄 ec_print.c(2.86 KB)
📄 ecdh_kdf.c(2.36 KB)
📄 ecdh_ossl.c(3.26 KB)
📄 ecdsa_ossl.c(12.55 KB)
📄 ecdsa_sign.c(1.77 KB)
📄 ecdsa_vrf.c(1.25 KB)
📄 eck_prn.c(7.32 KB)
📄 ecp_mont.c(7.81 KB)
📄 ecp_nist.c(4.79 KB)
📄 ecp_nistp224.c(59.33 KB)
📄 ecp_nistp256.c(73.78 KB)
📄 ecp_nistp521.c(71.96 KB)
📄 ecp_nistputil.c(9.8 KB)
📄 ecp_nistz256.c(50.59 KB)
📄 ecp_nistz256_table.c(602.98 KB)
📄 ecp_oct.c(10.17 KB)
📄 ecp_smpl.c(48.07 KB)
📄 ecx_meth.c(20.65 KB)

Editing: ec_check.c

/*
 * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include "ec_local.h"
#include <openssl/err.h>

int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx)
{
    int ret = 0;
    const BIGNUM *order;
    BN_CTX *new_ctx = NULL;
    EC_POINT *point = NULL;

/* Custom curves assumed to be correct */
    if ((group->meth->flags & EC_FLAGS_CUSTOM_CURVE) != 0)
        return 1;

if (ctx == NULL) {
        ctx = new_ctx = BN_CTX_new();
        if (ctx == NULL) {
            ECerr(EC_F_EC_GROUP_CHECK, ERR_R_MALLOC_FAILURE);
            goto err;
        }
    }

/* check the discriminant */
    if (!EC_GROUP_check_discriminant(group, ctx)) {
        ECerr(EC_F_EC_GROUP_CHECK, EC_R_DISCRIMINANT_IS_ZERO);
        goto err;
    }

/* 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;
    }

/* check the order of the generator */
    if ((point = EC_POINT_new(group)) == NULL)
        goto err;
    order = EC_GROUP_get0_order(group);
    if (order == NULL)
        goto err;
    if (BN_is_zero(order)) {
        ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_ORDER);
        goto err;
    }

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;
    }

ret = 1;

err:
    BN_CTX_free(new_ctx);
    EC_POINT_free(point);
    return ret;
}

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Editing: ec_check.c

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