ex_crypto.c

 
#include "nilorea/n_log.h"
#include "nilorea/n_list.h"
#include "nilorea/n_str.h"
#include "nilorea/n_base64.h"
#include "nilorea/n_crypto.h"
 
int main( int argc , char *argv[] )
{
 
    void usage(void)
    {
        fprintf( stderr, "%s usage:\n" 
                "     -i input_file [optional] use a file as datas instead of hard coded 3 lines text\n"
                "     -v version\n"
                "     -V log level: LOG_INFO, LOG_NOTICE, LOG_ERR, LOG_DEBUG\n"
                "     -h help\n" , argv[ 0 ] );
    }
 
 
    int getoptret = 0, ret = 0 ,
        log_level = LOG_DEBUG ;  /* default log level */
 
    N_STR *input_name = NULL ; 
 
    /* Arguments optionnels */
    /* -v version
     * -V log level
     * -h help
     */
    while( ( getoptret = getopt( argc, argv, "i:hvV:" ) ) != EOF)
    {
        switch( getoptret )
        {
            case 'i' :
                input_name = char_to_nstr( optarg );
                break ;
            case 'v' :
                fprintf( stderr, "Date de compilation : %s a %s.\n", __DATE__, __TIME__ );
                exit( 1 );
            case 'V' :
                if( !strncmp( "LOG_NULL", optarg, 5 ) )
                {
                    log_level = LOG_NULL ;
                }
                else
                {
                    if( !strncmp( "LOG_NOTICE", optarg, 6 ) )
                    {
                        log_level = LOG_NOTICE;
                    }
                    else
                    {
                        if( !strncmp( "LOG_INFO", optarg, 7 ) )
                        {
                            log_level = LOG_INFO;
                        }
                        else
                        {
                            if( !strncmp( "LOG_ERR", optarg, 5 ) )
                            {
                                log_level = LOG_ERR;
                            }
                            else
                            {
                                if( !strncmp( "LOG_DEBUG", optarg, 5 ) )
                                {
                                    log_level = LOG_DEBUG;
                                }
                                else
                                {
                                    fprintf( stderr, "%s n'est pas un niveau de log valide.\n", optarg );
                                    exit( -1 );
                                }
                            }
                        }
                    }
                }
                break;
            default :
            case '?' :
                {
                    if( optopt == 'V' )
                    {
                        fprintf( stderr, "                                  =>      Missing log level\n" );
                    }
                    else if( optopt == 'p' )
                    {
                        fprintf( stderr, "                                  =>      Missing port\n" );
                    }
                    else if( optopt == 'i' )
                    {
                        fprintf( stderr, "                                  =>      Missing filename\n" );
                    }
                    else if( optopt != 's' )
                    {
                        fprintf( stderr, "                                  =>      Unknow missing option %c\n", optopt );
                    }
                    usage();
                    exit( 1 );
                }
            case 'h' :
                {
                    usage();
                    exit( 1 );
                }
        }
    }
    set_log_level( log_level );
 
    N_STR *EXAMPLE_TEXT = char_to_nstr( 
            "##############################################################\n"
            "# This is an example of crypto encode/decode, with a newline #\n"
            "# This is the end of the test                                #\n" 
            "##############################################################" );
 
    n_log( LOG_NOTICE, "Testing crypto, encoding text of size (%ld/%ld):\n%s" , EXAMPLE_TEXT -> written , EXAMPLE_TEXT -> length , _nstr( EXAMPLE_TEXT ) );
    /*                                   10        20        30        40        50        60     */
    /*                         "1234567890123456789012345678901234567890123456789012345678901234" */
    //N_STR *key = n_vigenere_get_rootkey( 128 );
    N_STR *key = char_to_nstr( "RKCHSLZWFNASULJFVPRVUUUAEUVEMSSGEVNWIMVPZVIWITBGIUBEQVEURBYEWTMCQZZYNWQMRAIBTMHDIKIZHOVZQUFONRQDSRDFNTTGVEKOSTSAEABLOXMGTTWIMPNE" );
    n_log( LOG_DEBUG , "key= %s" , _nstr( key ) );
 
    N_STR *B64_EXAMPLE_TEXT = n_base64_encode( EXAMPLE_TEXT );
    N_STR *encoded_data = n_vigenere_encode( B64_EXAMPLE_TEXT , key );
    n_log( LOG_DEBUG , "encoded data=\n%s" , _nstr( encoded_data ) );
 
    N_STR *decoded_data = n_vigenere_decode( encoded_data , key );
    N_STR *unbase64 = n_base64_decode( decoded_data );
    n_log( LOG_DEBUG , "decoded data=\n%s" , _nstr( unbase64 ) );
    free_nstr( &unbase64 );
 
    N_STR *encoded_question = n_vigenere_get_question( 128 );
    N_STR *decoded_question = n_vigenere_quick_decode( encoded_question );
    n_log( LOG_DEBUG , "encoded_question: %s" , _nstr( encoded_question ) );
    n_log( LOG_DEBUG , "decoded_question: %s" , _nstr( decoded_question ) );
    free_nstr( &decoded_question );
 
 
    N_STR *answer = n_vigenere_get_answer( key , encoded_question );    
    n_log( LOG_DEBUG , "answer: %s" , _nstr( answer ) );
 
    N_STR *decode_qa = n_vigenere_decode_qa( encoded_data , encoded_question , answer );
    n_log( LOG_DEBUG , "encode root decode qa:\n%s" , _nstr( decode_qa ) );
    free_nstr( &decode_qa );
 
    N_STR *encode_qa = n_vigenere_encode_qa( EXAMPLE_TEXT , encoded_question , answer );
    n_log( LOG_DEBUG , "encode qa:\n%s" , _nstr( encode_qa ) );
 
    decode_qa = n_vigenere_decode_qa( encode_qa , encoded_question , answer );
    n_log( LOG_DEBUG , "encode qa decode qa:\n%s" , _nstr( decode_qa ) );
    free_nstr( &decode_qa );
 
    N_STR *decode_qa_root = n_vigenere_decode( encode_qa , key );
    unbase64 = n_base64_decode( decode_qa_root );
    n_log( LOG_DEBUG , "encode qa - decode root:\n%s" , _nstr( unbase64 ) );
 
    free_nstr( &decode_qa_root );
                free_nstr( &encode_qa );
 
    if( input_name )
    {
 
        N_STR *output_name_enc = NULL ;
        N_STR *output_name_dec = NULL ;
        N_STR *output_name_dec_question = NULL ;
 
        nstrprintf( output_name_enc , "%s.crypt_encoded" , _nstr( input_name ) );
        if( n_vigenere_encode_file( input_name , output_name_enc , key ) )
        {
            n_log( LOG_DEBUG , "Encoded file saved in %s" , _nstr( output_name_enc ) );
 
            nstrprintf( output_name_dec , "%s.crypt_decoded" , _nstr( input_name ) );
            if( n_vigenere_decode_file( output_name_enc , output_name_dec , key ) )
            {
                n_log( LOG_DEBUG , "Decoded file saved in %s" , _nstr( output_name_dec ) );
 
                nstrprintf( output_name_dec_question , "%s.crypt_decoded_question" , _nstr( input_name ) );
                if( n_vigenere_decode_file_qa( output_name_enc , output_name_dec_question , encoded_question , answer ) )
                {
                    n_log( LOG_DEBUG , "Decoded with question/answer file saved in %s" , _nstr( output_name_dec_question ) );
                }
                else
                {
                    n_log( LOG_ERR , "unable to decode with question answer" );
                    ret = 1 ;
                }
            }
            else
            {
                    n_log( LOG_ERR , "unable to decode with root key" );
                    ret = 1 ;
            }
        }
        else
        {
                    n_log( LOG_ERR , "unable to encode with root key" );
                    ret = 1 ;
        }
 
        free_nstr( &input_name );
        free_nstr( &output_name_enc );
        free_nstr( &output_name_dec );
        free_nstr( &output_name_dec_question );
    }
 
    free_nstr( &key );
    free_nstr( &encoded_data );
    free_nstr( &decoded_data );
    free_nstr( &encoded_question );
    free_nstr( &answer );
    free_nstr( &EXAMPLE_TEXT );
    free_nstr( &B64_EXAMPLE_TEXT );
    free_nstr( &unbase64 );
 
    exit( ret );
} /* END_OF_MAIN */