/*
 *  SSL certificate functionality tests
 *
 *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#define mbedtls_snprintf   snprintf
#define mbedtls_printf     printf
#endif

#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_X509_CRT_PARSE_C) && \
    defined(MBEDTLS_FS_IO) && defined(MBEDTLS_X509_CRL_PARSE_C)
#include "mbedtls/certs.h"
#include "mbedtls/x509_crt.h"

#include <stdio.h>
#include <string.h>
#endif

#define MAX_CLIENT_CERTS    8

#if !defined(MBEDTLS_RSA_C) || !defined(MBEDTLS_X509_CRT_PARSE_C) || \
    !defined(MBEDTLS_FS_IO) || !defined(MBEDTLS_X509_CRL_PARSE_C)
int main( void )
{
    mbedtls_printf("MBEDTLS_RSA_C and/or MBEDTLS_X509_CRT_PARSE_C "
           "MBEDTLS_FS_IO and/or MBEDTLS_X509_CRL_PARSE_C "
           "not defined.\n");
    return( 0 );
}
#else
const char *client_certificates[MAX_CLIENT_CERTS] =
{
    "client1.crt",
    "client2.crt",
    "server1.crt",
    "server2.crt",
    "cert_sha224.crt",
    "cert_sha256.crt",
    "cert_sha384.crt",
    "cert_sha512.crt"
};

const char *client_private_keys[MAX_CLIENT_CERTS] =
{
    "client1.key",
    "client2.key",
    "server1.key",
    "server2.key",
    "cert_digest.key",
    "cert_digest.key",
    "cert_digest.key",
    "cert_digest.key"
};

int main( void )
{
    int ret, i;
    mbedtls_x509_crt cacert;
    mbedtls_x509_crl crl;
    char buf[10240];

    mbedtls_x509_crt_init( &cacert );
    mbedtls_x509_crl_init( &crl );

    /*
     * 1.1. Load the trusted CA
     */
    mbedtls_printf( "\n  . Loading the CA root certificate ..." );
    fflush( stdout );

    /*
     * Alternatively, you may load the CA certificates from a .pem or
     * .crt file by calling mbedtls_x509_crt_parse_file( &cacert, "myca.crt" ).
     */
    ret = mbedtls_x509_crt_parse_file( &cacert, "ssl/test-ca/test-ca.crt" );
    if( ret != 0 )
    {
        mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_file returned %d\n\n", ret );
        goto exit;
    }

    mbedtls_printf( " ok\n" );

    mbedtls_x509_crt_info( buf, 1024, "CRT: ", &cacert );
    mbedtls_printf("%s\n", buf );

    /*
     * 1.2. Load the CRL
     */
    mbedtls_printf( "  . Loading the CRL ..." );
    fflush( stdout );

    ret = mbedtls_x509_crl_parse_file( &crl, "ssl/test-ca/crl.pem" );
    if( ret != 0 )
    {
        mbedtls_printf( " failed\n  !  mbedtls_x509_crl_parse_file returned %d\n\n", ret );
        goto exit;
    }

    mbedtls_printf( " ok\n" );

    mbedtls_x509_crl_info( buf, 1024, "CRL: ", &crl );
    mbedtls_printf("%s\n", buf );

    for( i = 0; i < MAX_CLIENT_CERTS; i++ )
    {
        /*
         * 1.3. Load own certificate
         */
        char    name[512];
        uint32_t flags;
        mbedtls_x509_crt clicert;
        mbedtls_pk_context pk;

        mbedtls_x509_crt_init( &clicert );
        mbedtls_pk_init( &pk );

        mbedtls_snprintf(name, 512, "ssl/test-ca/%s", client_certificates[i]);

        mbedtls_printf( "  . Loading the client certificate %s...", name );
        fflush( stdout );

        ret = mbedtls_x509_crt_parse_file( &clicert, name );
        if( ret != 0 )
        {
            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_file returned %d\n\n", ret );
            goto exit;
        }

        mbedtls_printf( " ok\n" );

        /*
         * 1.4. Verify certificate validity with CA certificate
         */
        mbedtls_printf( "  . Verify the client certificate with CA certificate..." );
        fflush( stdout );

        ret = mbedtls_x509_crt_verify( &clicert, &cacert, &crl, NULL, &flags, NULL,
                               NULL );
        if( ret != 0 )
        {
            if( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED )
            {
                 char vrfy_buf[512];

                 mbedtls_printf( " failed\n" );
                 mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), "  ! ", flags );
                 mbedtls_printf( "%s\n", vrfy_buf );
             }
             else
             {
                mbedtls_printf( " failed\n  !  mbedtls_x509_crt_verify returned %d\n\n", ret );
                goto exit;
            }
        }

        mbedtls_printf( " ok\n" );

        /*
         * 1.5. Load own private key
         */
        mbedtls_snprintf(name, 512, "ssl/test-ca/%s", client_private_keys[i]);

        mbedtls_printf( "  . Loading the client private key %s...", name );
        fflush( stdout );

        ret = mbedtls_pk_parse_keyfile( &pk, name, NULL );
        if( ret != 0 )
        {
            mbedtls_printf( " failed\n  !  mbedtls_pk_parse_keyfile returned %d\n\n", ret );
            goto exit;
        }

        mbedtls_printf( " ok\n" );

        /*
         * 1.6. Verify certificate validity with private key
         */
        mbedtls_printf( "  . Verify the client certificate with private key..." );
        fflush( stdout );


        /* EC NOT IMPLEMENTED YET */
        if( ! mbedtls_pk_can_do( &clicert.pk, MBEDTLS_PK_RSA ) )
        {
            mbedtls_printf( " failed\n  !  certificate's key is not RSA\n\n" );
            ret = MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE;
            goto exit;
        }

        ret = mbedtls_mpi_cmp_mpi(&mbedtls_pk_rsa( pk )->N, &mbedtls_pk_rsa( clicert.pk )->N);
        if( ret != 0 )
        {
            mbedtls_printf( " failed\n  !  mbedtls_mpi_cmp_mpi for N returned %d\n\n", ret );
            goto exit;
        }

        ret = mbedtls_mpi_cmp_mpi(&mbedtls_pk_rsa( pk )->E, &mbedtls_pk_rsa( clicert.pk )->E);
        if( ret != 0 )
        {
            mbedtls_printf( " failed\n  !  mbedtls_mpi_cmp_mpi for E returned %d\n\n", ret );
            goto exit;
        }

        ret = mbedtls_rsa_check_privkey( mbedtls_pk_rsa( pk ) );
        if( ret != 0 )
        {
            mbedtls_printf( " failed\n  !  mbedtls_rsa_check_privkey returned %d\n\n", ret );
            goto exit;
        }

        mbedtls_printf( " ok\n" );

        mbedtls_x509_crt_free( &clicert );
        mbedtls_pk_free( &pk );
    }

exit:
    mbedtls_x509_crt_free( &cacert );
    mbedtls_x509_crl_free( &crl );

#if defined(_WIN32)
    mbedtls_printf( "  + Press Enter to exit this program.\n" );
    fflush( stdout ); getchar();
#endif

    return( ret );
}
#endif /* MBEDTLS_RSA_C && MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO &&
          MBEDTLS_X509_CRL_PARSE_C */