text: /*
   *  Certificate request reading application
   *
   *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   *  SPDX-License-Identifier: Apache-2.0
   *
   *  Licensed under the Apache License, Version 2.0 (the "License"); you may
   *  not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *  http://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   *  This file is part of mbed TLS (https://tls.mbed.org)
   */
  
  #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>
  #include <stdlib.h>
  #define mbedtls_printf          printf
  #define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
  #define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
  #endif /* MBEDTLS_PLATFORM_C */
  
  #if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
      !defined(MBEDTLS_X509_CSR_PARSE_C) || !defined(MBEDTLS_FS_IO)
  int main( void )
  {
      mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
             "MBEDTLS_X509_CSR_PARSE_C and/or MBEDTLS_FS_IO not defined.\n");
      return( 0 );
  }
  #else
  
  #include "mbedtls/x509_csr.h"
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  #define DFL_FILENAME            "cert.req"
  #define DFL_DEBUG_LEVEL         0
  
  #define USAGE \
      "\n usage: req_app param=<>...\n"                   \
      "\n acceptable parameters:\n"                       \
      "    filename=%%s         default: cert.req\n"      \
      "\n"
  
  /*
   * global options
   */
  struct options
  {
      const char *filename;       /* filename of the certificate request  */
  } opt;
  
  int main( int argc, char *argv[] )
  {
      int ret = 1;
      int exit_code = MBEDTLS_EXIT_FAILURE;
      unsigned char buf[100000];
      mbedtls_x509_csr csr;
      int i;
      char *p, *q;
  
      /*
       * Set to sane values
       */
      mbedtls_x509_csr_init( &csr );
  
      if( argc == 0 )
      {
      usage:
          mbedtls_printf( USAGE );
          goto exit;
      }
  
      opt.filename            = DFL_FILENAME;
  
      for( i = 1; i < argc; i++ )
      {
          p = argv[i];
          if( ( q = strchr( p, '=' ) ) == NULL )
              goto usage;
          *q++ = '\0';
  
          if( strcmp( p, "filename" ) == 0 )
              opt.filename = q;
          else
              goto usage;
      }
  
      /*
       * 1.1. Load the CSR
       */
      mbedtls_printf( "\n  . Loading the CSR ..." );
      fflush( stdout );
  
      ret = mbedtls_x509_csr_parse_file( &csr, opt.filename );
  
      if( ret != 0 )
      {
          mbedtls_printf( " failed\n  !  mbedtls_x509_csr_parse_file returned %d\n\n", ret );
          mbedtls_x509_csr_free( &csr );
          goto exit;
      }
  
      mbedtls_printf( " ok\n" );
  
      /*
       * 1.2 Print the CSR
       */
      mbedtls_printf( "  . CSR information    ...\n" );
      ret = mbedtls_x509_csr_info( (char *) buf, sizeof( buf ) - 1, "      ", &csr );
      if( ret == -1 )
      {
          mbedtls_printf( " failed\n  !  mbedtls_x509_csr_info returned %d\n\n", ret );
          mbedtls_x509_csr_free( &csr );
          goto exit;
      }
  
      mbedtls_printf( "%s\n", buf );
  
      exit_code = MBEDTLS_EXIT_SUCCESS;
  
  exit:
      mbedtls_x509_csr_free( &csr );
  
  #if defined(_WIN32)
      mbedtls_printf( "  + Press Enter to exit this program.\n" );
      fflush( stdout ); getchar();
  #endif
  
      return( exit_code );
  }
  #endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_X509_CSR_PARSE_C &&
            MBEDTLS_FS_IO */
  