nx_secure/src/nxe_secure_x509_common_name_dns_check.c


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/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2025-present Eclipse ThreadX Contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** NetX Secure Component                                                 */
/**                                                                       */
/**    X.509 Digital Certificates                                         */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/

#define NX_SECURE_SOURCE_CODE

#include "nx_secure_x509.h"

/* Bring in externs for caller checking code.  */

NX_SECURE_CALLER_CHECKING_EXTERNS

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _nxe_secure_x509_common_name_dns_check              PORTABLE C      */
/*                                                           6.4.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Timothy Stapko, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks for errors in the X.509 DNS name check.        */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    certificate                           Pointer to certificate        */
/*    dns_tld                               Top-level domain name         */
/*    dns_tld_length                        Length of TLD in bytes        */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    status                                Validity of certificate       */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _nx_secure_x509_common_name_dns_check                               */
/*                                          Actual X509 DNS name check    */
/*                                            call                        */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application code                                                    */
/*                                                                        */
/**************************************************************************/
UINT _nxe_secure_x509_common_name_dns_check(NX_SECURE_X509_CERT *certificate, const UCHAR *dns_tld,
                                            UINT dns_tld_length)
{
UINT status;

    /* Check for pointer errors. */
    if ((certificate == NX_CRYPTO_NULL) || (dns_tld == NX_CRYPTO_NULL) || (dns_tld_length == 0))
    {
#ifdef NX_CRYPTO_STANDALONE_ENABLE
        return(NX_CRYPTO_PTR_ERROR);
#else
        return(NX_PTR_ERROR);
#endif /* NX_CRYPTO_STANDALONE_ENABLE */
    }

    /* Check for appropriate caller.  */
    NX_THREADS_ONLY_CALLER_CHECKING

    /* Make the actual call. */
    status = _nx_secure_x509_common_name_dns_check(certificate, dns_tld, dns_tld_length);

    return(status);
}