mirror of https://github.com/openssl/openssl.git
133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/*
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* Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "apps.h"
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/rand.h>
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typedef enum OPTION_choice {
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OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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OPT_OUT, OPT_ENGINE, OPT_RAND, OPT_BASE64, OPT_HEX
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} OPTION_CHOICE;
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const OPTIONS rand_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [flags] num\n"},
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{OPT_HELP_STR, 1, '-', "Valid options are:\n"},
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{"help", OPT_HELP, '-', "Display this summary"},
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{"out", OPT_OUT, '>', "Output file"},
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{"rand", OPT_RAND, 's',
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"Load the file(s) into the random number generator"},
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{"base64", OPT_BASE64, '-', "Base64 encode output"},
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{"hex", OPT_HEX, '-', "Hex encode output"},
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#ifndef OPENSSL_NO_ENGINE
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{"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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#endif
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{NULL}
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};
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int rand_main(int argc, char **argv)
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{
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ENGINE *e = NULL;
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BIO *out = NULL;
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char *inrand = NULL, *outfile = NULL, *prog;
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OPTION_CHOICE o;
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int format = FORMAT_BINARY, i, num = -1, r, ret = 1;
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prog = opt_init(argc, argv, rand_options);
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while ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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opt_help(rand_options);
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ret = 0;
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goto end;
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case OPT_OUT:
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outfile = opt_arg();
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break;
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case OPT_ENGINE:
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e = setup_engine(opt_arg(), 0);
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break;
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case OPT_RAND:
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inrand = opt_arg();
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break;
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case OPT_BASE64:
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format = FORMAT_BASE64;
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break;
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case OPT_HEX:
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format = FORMAT_TEXT;
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break;
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}
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}
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argc = opt_num_rest();
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argv = opt_rest();
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if (argc != 1 || !opt_int(argv[0], &num) || num < 0)
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goto opthelp;
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app_RAND_load_file(NULL, (inrand != NULL));
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if (inrand != NULL)
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BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
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app_RAND_load_files(inrand));
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out = bio_open_default(outfile, 'w', format);
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if (out == NULL)
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goto end;
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if (format == FORMAT_BASE64) {
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BIO *b64 = BIO_new(BIO_f_base64());
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if (b64 == NULL)
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goto end;
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out = BIO_push(b64, out);
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}
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while (num > 0) {
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unsigned char buf[4096];
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int chunk;
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chunk = num;
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if (chunk > (int)sizeof(buf))
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chunk = sizeof buf;
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r = RAND_bytes(buf, chunk);
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if (r <= 0)
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goto end;
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if (format != FORMAT_TEXT) {
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if (BIO_write(out, buf, chunk) != chunk)
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goto end;
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} else {
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for (i = 0; i < chunk; i++)
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if (BIO_printf(out, "%02x", buf[i]) != 2)
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goto end;
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}
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num -= chunk;
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}
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if (format == FORMAT_TEXT)
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BIO_puts(out, "\n");
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if (BIO_flush(out) <= 0 || !app_RAND_write_file(NULL))
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goto end;
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ret = 0;
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end:
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if (ret != 0)
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ERR_print_errors(bio_err);
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release_engine(e);
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BIO_free_all(out);
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return (ret);
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}
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