1 /**
2 * \brief Generate random data into a file
3 *
4 * Copyright The Mbed TLS Contributors
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
20 #if !defined(MBEDTLS_CONFIG_FILE)
21 #include "mbedtls/config.h"
22 #else
23 #include MBEDTLS_CONFIG_FILE
24 #endif
25
26 #if defined(MBEDTLS_PLATFORM_C)
27 #include "mbedtls/platform.h"
28 #else
29 #include <stdio.h>
30 #include <stdlib.h>
31 #define mbedtls_fprintf fprintf
32 #define mbedtls_printf printf
33 #define mbedtls_exit exit
34 #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
35 #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
36 #endif /* MBEDTLS_PLATFORM_C */
37
38 #if defined(MBEDTLS_HAVEGE_C) && defined(MBEDTLS_FS_IO)
39 #include "mbedtls/havege.h"
40
41 #include <stdio.h>
42 #include <time.h>
43 #endif
44
45 #if !defined(MBEDTLS_HAVEGE_C) || !defined(MBEDTLS_FS_IO)
main(void)46 int main( void )
47 {
48 mbedtls_printf("MBEDTLS_HAVEGE_C not defined.\n");
49 mbedtls_exit( 0 );
50 }
51 #else
52
53
main(int argc,char * argv[])54 int main( int argc, char *argv[] )
55 {
56 FILE *f;
57 time_t t;
58 int i, k, ret = 1;
59 int exit_code = MBEDTLS_EXIT_FAILURE;
60 mbedtls_havege_state hs;
61 unsigned char buf[1024];
62
63 if( argc < 2 )
64 {
65 mbedtls_fprintf( stderr, "usage: %s <output filename>\n", argv[0] );
66 mbedtls_exit( exit_code );
67 }
68
69 if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
70 {
71 mbedtls_printf( "failed to open '%s' for writing.\n", argv[1] );
72 mbedtls_exit( exit_code );
73 }
74
75 mbedtls_havege_init( &hs );
76
77 t = time( NULL );
78
79 for( i = 0, k = 768; i < k; i++ )
80 {
81 if( ( ret = mbedtls_havege_random( &hs, buf, sizeof( buf ) ) ) != 0 )
82 {
83 mbedtls_printf( " failed\n ! mbedtls_havege_random returned -0x%04X",
84 ( unsigned int ) -ret );
85 goto exit;
86 }
87
88 fwrite( buf, sizeof( buf ), 1, f );
89
90 mbedtls_printf( "Generating %ldkb of data in file '%s'... %04.1f" \
91 "%% done\r", (long)(sizeof(buf) * k / 1024), argv[1], (100 * (float) (i + 1)) / k );
92 fflush( stdout );
93 }
94
95 if( t == time( NULL ) )
96 t--;
97
98 mbedtls_printf(" \n ");
99
100 exit_code = MBEDTLS_EXIT_SUCCESS;
101
102 exit:
103 mbedtls_havege_free( &hs );
104 fclose( f );
105 mbedtls_exit( exit_code );
106 }
107 #endif /* MBEDTLS_HAVEGE_C */
108
