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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"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_x509_find_certificate_methods PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function finds crypto methods specified in a certificate. */
/* */
/* INPUT */
/* */
/* cert Pointer to X509 certificate */
/* signature_algorithm Id for signature method */
/* crypto_methods Return matching table entry */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_secure_x509_certificate_verify Verify a certificate */
/* _nx_secure_x509_crl_verify Verify revocation list */
/* _nx_secure_tls_process_certificate_verify */
/* Process CertificateVerify */
/* _nx_secure_tls_process_server_key_exchange */
/* Process ServerKeyExchange */
/* _nx_secure_tls_send_certificate_verify */
/* Send certificate verify */
/* */
/**************************************************************************/
UINT _nx_secure_x509_find_certificate_methods(NX_SECURE_X509_CERT *cert, USHORT signature_algorithm,
NX_SECURE_X509_CRYPTO **crypto_methods)
{
SHORT index;
/* The number of ciphersuites is very small so a linear search should be fine. */
for (index = 0; index < cert -> nx_secure_x509_cipher_table_size; ++index)
{
/* See if the ciphersuite is supported. */
if (cert -> nx_secure_x509_cipher_table[index].nx_secure_x509_crypto_identifier == signature_algorithm)
{
*crypto_methods = &cert -> nx_secure_x509_cipher_table[index];
return(NX_SECURE_X509_SUCCESS);
}
}
/* No entry found, crypto routines unknown. */
*crypto_methods = NX_CRYPTO_NULL;
return(NX_SECURE_X509_UNKNOWN_CERT_SIG_ALGORITHM);
}
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