107 lines
3 KiB
C
107 lines
3 KiB
C
/**
|
|
* \brief Use and generate random data into a file via the CTR_DBRG based on AES
|
|
*
|
|
* Copyright The Mbed TLS Contributors
|
|
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "mbedtls/build_info.h"
|
|
|
|
#include "mbedtls/platform.h"
|
|
|
|
#if defined(MBEDTLS_CTR_DRBG_C) && defined(MBEDTLS_ENTROPY_C) && \
|
|
defined(MBEDTLS_FS_IO)
|
|
#include "mbedtls/entropy.h"
|
|
#include "mbedtls/ctr_drbg.h"
|
|
|
|
#include <stdio.h>
|
|
#endif
|
|
|
|
#if !defined(MBEDTLS_CTR_DRBG_C) || !defined(MBEDTLS_ENTROPY_C) || \
|
|
!defined(MBEDTLS_FS_IO)
|
|
int main(void)
|
|
{
|
|
mbedtls_printf("MBEDTLS_CTR_DRBG_C and/or MBEDTLS_ENTROPY_C and/or MBEDTLS_FS_IO not defined.\n");
|
|
mbedtls_exit(0);
|
|
}
|
|
#else
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
FILE *f;
|
|
int i, k, ret = 1;
|
|
int exit_code = MBEDTLS_EXIT_FAILURE;
|
|
mbedtls_ctr_drbg_context ctr_drbg;
|
|
mbedtls_entropy_context entropy;
|
|
unsigned char buf[1024];
|
|
|
|
mbedtls_ctr_drbg_init(&ctr_drbg);
|
|
|
|
if (argc < 2) {
|
|
mbedtls_fprintf(stderr, "usage: %s <output filename>\n", argv[0]);
|
|
mbedtls_exit(exit_code);
|
|
}
|
|
|
|
if ((f = fopen(argv[1], "wb+")) == NULL) {
|
|
mbedtls_printf("failed to open '%s' for writing.\n", argv[1]);
|
|
mbedtls_exit(exit_code);
|
|
}
|
|
|
|
mbedtls_entropy_init(&entropy);
|
|
ret = mbedtls_ctr_drbg_seed(&ctr_drbg,
|
|
mbedtls_entropy_func,
|
|
&entropy,
|
|
(const unsigned char *) "RANDOM_GEN",
|
|
10);
|
|
if (ret != 0) {
|
|
mbedtls_printf("failed in mbedtls_ctr_drbg_seed: %d\n", ret);
|
|
goto cleanup;
|
|
}
|
|
mbedtls_ctr_drbg_set_prediction_resistance(&ctr_drbg, MBEDTLS_CTR_DRBG_PR_OFF);
|
|
|
|
#if defined(MBEDTLS_FS_IO)
|
|
ret = mbedtls_ctr_drbg_update_seed_file(&ctr_drbg, "seedfile");
|
|
|
|
if (ret == MBEDTLS_ERR_CTR_DRBG_FILE_IO_ERROR) {
|
|
mbedtls_printf("Failed to open seedfile. Generating one.\n");
|
|
ret = mbedtls_ctr_drbg_write_seed_file(&ctr_drbg, "seedfile");
|
|
if (ret != 0) {
|
|
mbedtls_printf("failed in mbedtls_ctr_drbg_write_seed_file: %d\n", ret);
|
|
goto cleanup;
|
|
}
|
|
} else if (ret != 0) {
|
|
mbedtls_printf("failed in mbedtls_ctr_drbg_update_seed_file: %d\n", ret);
|
|
goto cleanup;
|
|
}
|
|
#endif
|
|
|
|
for (i = 0, k = 768; i < k; i++) {
|
|
ret = mbedtls_ctr_drbg_random(&ctr_drbg, buf, sizeof(buf));
|
|
if (ret != 0) {
|
|
mbedtls_printf("failed!\n");
|
|
goto cleanup;
|
|
}
|
|
|
|
fwrite(buf, 1, sizeof(buf), f);
|
|
|
|
mbedtls_printf("Generating %ldkb of data in file '%s'... %04.1f" \
|
|
"%% done\r",
|
|
(long) (sizeof(buf) * k / 1024),
|
|
argv[1],
|
|
(100 * (float) (i + 1)) / k);
|
|
fflush(stdout);
|
|
}
|
|
|
|
exit_code = MBEDTLS_EXIT_SUCCESS;
|
|
|
|
cleanup:
|
|
mbedtls_printf("\n");
|
|
|
|
fclose(f);
|
|
mbedtls_ctr_drbg_free(&ctr_drbg);
|
|
mbedtls_entropy_free(&entropy);
|
|
|
|
mbedtls_exit(exit_code);
|
|
}
|
|
#endif /* MBEDTLS_CTR_DRBG_C && MBEDTLS_ENTROPY_C */
|