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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_remove PORTABLE C */
/* 6.1.6 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function removes an NX_SECURE_X509_CERT instance from */
/* a certificate linked list, keyed on the Common Name field. */
/* */
/* INPUT */
/* */
/* list_head Pointer to list head pointer */
/* name Distinguished name for match */
/* cert_id Numeric ID for match */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_secure_x509_distinguished_name_compare */
/* Compare distinguished name */
/* */
/* CALLED BY */
/* */
/* _nx_secure_x509_store_certificate_remove */
/* Remove certificate from 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_remove(NX_SECURE_X509_CERT **list_head,
NX_SECURE_X509_DISTINGUISHED_NAME *name, UINT cert_id)
{
NX_SECURE_X509_CERT **current_cert;
INT compare_result;
/* Check to see if the head of the certificates list is NULL. */
if (list_head == NX_CRYPTO_NULL)
{
/* Our certificate pointer was NULL, so return error. */
#ifdef NX_CRYPTO_STANDALONE_ENABLE
return(NX_CRYPTO_PTR_ERROR);
#else
return(NX_PTR_ERROR);
#endif /* NX_CRYPTO_STANDALONE_ENABLE */
}
else
{
/* Walk the list until we find a certificate with a matching CN. */
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, &(*current_cert) -> nx_secure_x509_distinguished_name, NX_SECURE_X509_NAME_COMMON_NAME);
}
if (compare_result == 0)
{
/* We found a match, remove it from the linked list. */
*current_cert = (*current_cert) -> nx_secure_x509_next_certificate;
/* We are OK to quit now, we removed the certificate. */
return(NX_SECURE_X509_SUCCESS);
}
/* Advance our current certificate pointers. */
current_cert = &(*current_cert) -> nx_secure_x509_next_certificate;
}
}
return(NX_SECURE_X509_CERTIFICATE_NOT_FOUND);
}