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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Secure Component */
/** */
/** X.509 Digital Certificates */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
#include "nx_secure_x509.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_x509_certificate_list_find PORTABLE C */
/* 6.1.6 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function finds a NX_SECURE_X509_CERT instance in a */
/* certificate linked list, based on the common name (CN) field. */
/* */
/* INPUT */
/* */
/* list_head Pointer to list head pointer */
/* name Distinguished name */
/* cert_id ID of certificate */
/* certificate Pointer to return certificate */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_secure_x509_distinguished_name_compare */
/* Compare distinguished name */
/* */
/* CALLED BY */
/* */
/* _nx_secure_tls_local_certificate_find */
/* Find local certificate */
/* _nx_secure_tls_remote_certificate_free */
/* Free remote certificate */
/* _nx_secure_x509_local_device_certificate_get */
/* Get the local certificate */
/* _nx_secure_x509_store_certificate_find */
/* Find a cert in a store */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* 04-02-2021 Timothy Stapko Modified comment(s), */
/* removed dependency on TLS, */
/* resulting in version 6.1.6 */
/* */
/**************************************************************************/
UINT _nx_secure_x509_certificate_list_find(NX_SECURE_X509_CERT **list_head,
NX_SECURE_X509_DISTINGUISHED_NAME *name,
UINT cert_id,
NX_SECURE_X509_CERT **certificate)
{
NX_SECURE_X509_CERT *current_cert;
INT compare_result;
/* Find out NULL pointers. */
if (certificate == NX_CRYPTO_NULL)
{
#ifdef NX_CRYPTO_STANDALONE_ENABLE
return(NX_CRYPTO_PTR_ERROR);
#else
return(NX_PTR_ERROR);
#endif /* NX_CRYPTO_STANDALONE_ENABLE */
}
/* Return NULL if certificate not found. */
*certificate = NX_CRYPTO_NULL;
if (list_head == NX_CRYPTO_NULL)
{
#ifdef NX_CRYPTO_STANDALONE_ENABLE
return(NX_CRYPTO_PTR_ERROR);
#else
return(NX_PTR_ERROR);
#endif /* NX_CRYPTO_STANDALONE_ENABLE */
}
/* Walk the list until we find a certificate with a matching CN.
Use a two-level pointer so we can modify the cert easily. */
current_cert = *list_head;
while (current_cert != NX_CRYPTO_NULL)
{
/* If name is passed as NX_NULL, use the cert_id to match. */
if (name == NX_CRYPTO_NULL)
{
/* Check the cert_id against the ID in the certificate. */
compare_result = (current_cert -> nx_secure_x509_cert_identifier == cert_id) ? 0 : 1;
}
else
{
/* Check the common name passed in against the parsed certificate CN. */
compare_result = _nx_secure_x509_distinguished_name_compare(name, ¤t_cert -> nx_secure_x509_distinguished_name, NX_SECURE_X509_NAME_COMMON_NAME);
}
/* We found a match, return it. */
if (!compare_result)
{
*certificate = current_cert;
return(NX_SECURE_X509_SUCCESS);
}
/* Advance our current certificate pointer. */
current_cert = current_cert -> nx_secure_x509_next_certificate;
}
return(NX_SECURE_X509_CERTIFICATE_NOT_FOUND);
}