openssl/apps/rand.c
Richard Levitte 296f54ee21 Restore module loading
The module loading feature got broken a while ago, so restore it, but
have it a bit more explicit this time around.

Reviewed-by: Stephen Henson <steve@openssl.org>
2015-05-29 12:41:50 +02:00

177 lines
5.5 KiB
C

/* ====================================================================
* 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 "apps.h"
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/rand.h>
typedef enum OPTION_choice {
OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
OPT_OUT, OPT_ENGINE, OPT_RAND, OPT_BASE64, OPT_HEX
} OPTION_CHOICE;
OPTIONS rand_options[] = {
{OPT_HELP_STR, 1, '-', "Usage: %s [flags] num\n"},
{OPT_HELP_STR, 1, '-', "Valid options are:\n"},
{"help", OPT_HELP, '-', "Display this summary"},
{"out", OPT_OUT, '>', "Output file"},
{"rand", OPT_RAND, 's',
"Load the file(s) into the random number generator"},
{"base64", OPT_BASE64, '-', "Base64 encode output"},
{"hex", OPT_HEX, '-', "Hex encode output"},
#ifndef OPENSSL_NO_ENGINE
{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
#endif
{NULL}
};
int rand_main(int argc, char **argv)
{
BIO *out = NULL;
char *inrand = NULL, *outfile = NULL, *prog;
OPTION_CHOICE o;
int base64 = 0, hex = 0, i, num = -1, r, ret = 1;
prog = opt_init(argc, argv, rand_options);
while ((o = opt_next()) != OPT_EOF) {
switch (o) {
case OPT_EOF:
case OPT_ERR:
opthelp:
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
goto end;
case OPT_HELP:
opt_help(rand_options);
ret = 0;
goto end;
case OPT_OUT:
outfile = opt_arg();
break;
case OPT_ENGINE:
(void)setup_engine(opt_arg(), 0);
break;
case OPT_RAND:
inrand = opt_arg();
break;
case OPT_BASE64:
base64 = 1;
break;
case OPT_HEX:
hex = 1;
break;
}
}
argc = opt_num_rest();
argv = opt_rest();
if (argc != 1 || (hex && base64))
goto opthelp;
if (sscanf(argv[0], "%d", &num) != 1 || num < 0)
goto opthelp;
if (!app_load_modules(NULL))
goto end;
app_RAND_load_file(NULL, (inrand != NULL));
if (inrand != NULL)
BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
app_RAND_load_files(inrand));
out = bio_open_default(outfile, "w");
if (out == NULL)
goto end;
if (base64) {
BIO *b64 = BIO_new(BIO_f_base64());
if (b64 == NULL)
goto end;
out = BIO_push(b64, out);
}
while (num > 0) {
unsigned char buf[4096];
int chunk;
chunk = num;
if (chunk > (int)sizeof(buf))
chunk = sizeof buf;
r = RAND_bytes(buf, chunk);
if (r <= 0)
goto end;
if (!hex)
BIO_write(out, buf, chunk);
else {
for (i = 0; i < chunk; i++)
BIO_printf(out, "%02x", buf[i]);
}
num -= chunk;
}
if (hex)
BIO_puts(out, "\n");
(void)BIO_flush(out);
app_RAND_write_file(NULL);
ret = 0;
end:
BIO_free_all(out);
return (ret);
}