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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 */
/** */
/** Transport Layer Security (TLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
/* Include necessary system files. */
#include "nx_secure_tls.h"
/* Bring in externs for caller checking code. */
NX_SECURE_CALLER_CHECKING_EXTERNS
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nxe_secure_tls_session_x509_client_verify_configure PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks for errors in setting up client X509 */
/* certificate verification for a TLS server instance. */
/* */
/* INPUT */
/* */
/* tls_session Pointer to TLS Session */
/* certs_number Number of client certs */
/* certificate_buffer Buffer allocated for certs */
/* buffer_size Buffer size in bytes */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_secure_tls_remote_certificate_buffer_allocate */
/* Allocate certificate buffers */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nxe_secure_tls_session_x509_client_verify_configure(NX_SECURE_TLS_SESSION *tls_session, UINT certs_number, VOID *certificate_buffer, ULONG buffer_size)
{
UINT status;
UINT metadata_size;
UINT cert_buffer_size;
/* Check for NULL pointers. */
if(tls_session == NX_NULL)
{
return(NX_PTR_ERROR);
}
/* Make sure the session is initialized. */
if(tls_session -> nx_secure_tls_id != NX_SECURE_TLS_ID)
{
return(NX_SECURE_TLS_SESSION_UNINITIALIZED);
}
/* If we have a non-null buffer but a size of 0, or a non-zero size but a NULL buffer
return error - non-null buffer needs non-zero size, null buffer must have size 0. */
if((certificate_buffer != NX_NULL && buffer_size == 0) ||
(certificate_buffer == NX_NULL && buffer_size != 0))
{
return(NX_INVALID_PARAMETERS);
}
/* Allow 0 remote certificates to be allocated - indicates that certs should be
allocated from packet buffer instead. */
if(certificate_buffer != NX_NULL)
{
/* Calculate the size of the X509 control blocks needed. */
metadata_size = sizeof(NX_SECURE_X509_CERT) * certs_number;
/* Check that buffer is large enough. */
if(buffer_size < metadata_size || certs_number == 0)
{
return(NX_INVALID_PARAMETERS);
}
/* Calculate the per-certificate size allocated from the buffer. */
cert_buffer_size = (buffer_size - metadata_size) / certs_number;
/* Check that the certificate buffer size makes sense. */
if(cert_buffer_size < NX_SECURE_TLS_MINIMUM_CERTIFICATE_SIZE)
{
return(NX_INVALID_PARAMETERS);
}
}
/* Check for appropriate caller. */
NX_THREADS_ONLY_CALLER_CHECKING
/* Call actual function. */
status = _nx_secure_tls_session_x509_client_verify_configure(tls_session, certs_number, certificate_buffer, buffer_size);
/* Return completion status. */
return(status);
}
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