mirror of
https://github.com/Mbed-TLS/mbedtls.git
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98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/**
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* \brief Generate random data into a file
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#include "mbedtls/platform.h"
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#if defined(MBEDTLS_HAVEGE_C) && defined(MBEDTLS_FS_IO)
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#include "mbedtls/havege.h"
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#include <stdio.h>
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#include <time.h>
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#endif
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#if !defined(MBEDTLS_HAVEGE_C) || !defined(MBEDTLS_FS_IO)
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int main(void)
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{
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mbedtls_printf("MBEDTLS_HAVEGE_C not defined.\n");
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mbedtls_exit(0);
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}
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#else
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int main(int argc, char *argv[])
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{
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FILE *f;
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time_t t;
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int i, k, ret = 1;
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int exit_code = MBEDTLS_EXIT_FAILURE;
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mbedtls_havege_state hs;
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unsigned char buf[1024];
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if (argc < 2) {
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mbedtls_fprintf(stderr, "usage: %s <output filename>\n", argv[0]);
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mbedtls_exit(exit_code);
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}
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if ((f = fopen(argv[1], "wb+")) == NULL) {
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mbedtls_printf("failed to open '%s' for writing.\n", argv[1]);
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mbedtls_exit(exit_code);
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}
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mbedtls_havege_init(&hs);
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t = time(NULL);
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for (i = 0, k = 768; i < k; i++) {
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if ((ret = mbedtls_havege_random(&hs, buf, sizeof(buf))) != 0) {
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mbedtls_printf(" failed\n ! mbedtls_havege_random returned -0x%04X",
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(unsigned int) -ret);
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goto exit;
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}
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fwrite(buf, sizeof(buf), 1, f);
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mbedtls_printf("Generating %ldkb of data in file '%s'... %04.1f" \
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"%% done\r",
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(long) (sizeof(buf) * k / 1024),
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argv[1],
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(100 * (float) (i + 1)) / k);
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fflush(stdout);
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}
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if (t == time(NULL)) {
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t--;
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}
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mbedtls_printf(" \n ");
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exit_code = MBEDTLS_EXIT_SUCCESS;
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exit:
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mbedtls_havege_free(&hs);
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fclose(f);
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mbedtls_exit(exit_code);
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}
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#endif /* MBEDTLS_HAVEGE_C */
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