File: [local] / src / usr.bin / openssl / rand.c (download)
Revision 1.18, Sun Jul 23 11:39:29 2023 UTC (10 months, 2 weeks ago) by tb
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, HEAD Changes since 1.17: +2 -2 lines
sprinkle some void between () in function definitions
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/* $OpenBSD: rand.c,v 1.18 2023/07/23 11:39:29 tb Exp $ */
/* ====================================================================
* Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
static struct {
int base64;
int hex;
char *outfile;
} cfg;
static const struct option rand_options[] = {
{
.name = "base64",
.desc = "Perform base64 encoding on output",
.type = OPTION_FLAG,
.opt.flag = &cfg.base64,
},
{
.name = "hex",
.desc = "Hexadecimal output",
.type = OPTION_FLAG,
.opt.flag = &cfg.hex,
},
{
.name = "out",
.argname = "file",
.desc = "Write to the given file instead of standard output",
.type = OPTION_ARG,
.opt.arg = &cfg.outfile,
},
{NULL},
};
static void
rand_usage(void)
{
fprintf(stderr,
"usage: rand [-base64 | -hex] [-out file] num\n");
options_usage(rand_options);
}
int
rand_main(int argc, char **argv)
{
char *num_bytes = NULL;
int ret = 1;
int badopt = 0;
int num = -1;
int i, r;
BIO *out = NULL;
if (pledge("stdio cpath wpath rpath", NULL) == -1) {
perror("pledge");
exit(1);
}
memset(&cfg, 0, sizeof(cfg));
if (options_parse(argc, argv, rand_options, &num_bytes, NULL) != 0) {
rand_usage();
return (1);
}
if (num_bytes != NULL) {
r = sscanf(num_bytes, "%d", &num);
if (r == 0 || num < 0)
badopt = 1;
} else
badopt = 1;
if (cfg.hex && cfg.base64)
badopt = 1;
if (badopt) {
rand_usage();
goto err;
}
out = BIO_new(BIO_s_file());
if (out == NULL)
goto err;
if (cfg.outfile != NULL)
r = BIO_write_filename(out, cfg.outfile);
else
r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
if (r <= 0)
goto err;
if (cfg.base64) {
BIO *b64 = BIO_new(BIO_f_base64());
if (b64 == NULL)
goto err;
out = BIO_push(b64, out);
}
while (num > 0) {
unsigned char buf[4096];
int chunk;
chunk = num;
if (chunk > (int) sizeof(buf))
chunk = sizeof(buf);
arc4random_buf(buf, chunk);
if (cfg.hex) {
for (i = 0; i < chunk; i++)
BIO_printf(out, "%02x", buf[i]);
} else
BIO_write(out, buf, chunk);
num -= chunk;
}
if (cfg.hex)
BIO_puts(out, "\n");
(void) BIO_flush(out);
ret = 0;
err:
ERR_print_errors(bio_err);
BIO_free_all(out);
return (ret);
}