1 /**
2 * \brief Generate random data into a file
3 *
4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
8 * not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 * This file is part of mbed TLS (https://tls.mbed.org)
20 */
21
22 #if !defined(MBEDTLS_CONFIG_FILE)
23 #include "mbedtls/config.h"
24 #else
25 #include MBEDTLS_CONFIG_FILE
26 #endif
27
28 #if defined(MBEDTLS_PLATFORM_C)
29 #include "mbedtls/platform.h"
30 #else
31 #include <stdio.h>
32 #define mbedtls_fprintf fprintf
33 #define mbedtls_printf printf
34 #endif
35
36 #if defined(MBEDTLS_HAVEGE_C) && defined(MBEDTLS_FS_IO)
37 #include "mbedtls/havege.h"
38
39 #include <stdio.h>
40 #include <time.h>
41 #endif
42
43 #if !defined(MBEDTLS_HAVEGE_C) || !defined(MBEDTLS_FS_IO)
main(void)44 int main( void )
45 {
46 mbedtls_printf("MBEDTLS_HAVEGE_C not defined.\n");
47 return( 0 );
48 }
49 #else
main(int argc,char * argv[])50 int main( int argc, char *argv[] )
51 {
52 FILE *f;
53 time_t t;
54 int i, k, ret = 0;
55 mbedtls_havege_state hs;
56 unsigned char buf[1024];
57
58 if( argc < 2 )
59 {
60 mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
61 return( 1 );
62 }
63
64 if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
65 {
66 mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
67 return( 1 );
68 }
69
70 mbedtls_havege_init( &hs );
71
72 t = time( NULL );
73
74 for( i = 0, k = 768; i < k; i++ )
75 {
76 if( mbedtls_havege_random( &hs, buf, sizeof( buf ) ) != 0 )
77 {
78 mbedtls_printf( "Failed to get random from source.\n" );
79
80 ret = 1;
81 goto exit;
82 }
83
84 fwrite( buf, sizeof( buf ), 1, f );
85
86 mbedtls_printf( "Generating %ldkb of data in file '%s'... %04.1f" \
87 "%% done\r", (long)(sizeof(buf) * k / 1024), argv[1], (100 * (float) (i + 1)) / k );
88 fflush( stdout );
89 }
90
91 if( t == time( NULL ) )
92 t--;
93
94 mbedtls_printf(" \n ");
95
96 exit:
97 mbedtls_havege_free( &hs );
98 fclose( f );
99 return( ret );
100 }
101 #endif /* MBEDTLS_HAVEGE_C */
102
