| 1 | /*
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| 2 | * Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include "apps.h"
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| 11 | #include "progs.h"
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| 12 |
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| 13 | #include <ctype.h>
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| 14 | #include <stdio.h>
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| 15 | #include <string.h>
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| 16 |
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| 17 | #include <openssl/bio.h>
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| 18 | #include <openssl/err.h>
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| 19 | #include <openssl/rand.h>
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| 20 |
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| 21 | typedef enum OPTION_choice {
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| 22 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 23 | OPT_OUT, OPT_ENGINE, OPT_BASE64, OPT_HEX,
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| 24 | OPT_R_ENUM
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| 25 | } OPTION_CHOICE;
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| 26 |
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| 27 | const OPTIONS rand_options[] = {
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| 28 | {OPT_HELP_STR, 1, '-', "Usage: %s [flags] num\n"},
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| 29 | {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
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| 30 | {"help", OPT_HELP, '-', "Display this summary"},
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| 31 | {"out", OPT_OUT, '>', "Output file"},
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| 32 | OPT_R_OPTIONS,
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| 33 | {"base64", OPT_BASE64, '-', "Base64 encode output"},
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| 34 | {"hex", OPT_HEX, '-', "Hex encode output"},
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| 35 | #ifndef OPENSSL_NO_ENGINE
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| 36 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
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| 37 | #endif
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| 38 | {NULL}
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| 39 | };
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| 40 |
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| 41 | int rand_main(int argc, char **argv)
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| 42 | {
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| 43 | ENGINE *e = NULL;
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| 44 | BIO *out = NULL;
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| 45 | char *outfile = NULL, *prog;
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| 46 | OPTION_CHOICE o;
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| 47 | int format = FORMAT_BINARY, i, num = -1, r, ret = 1;
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| 48 |
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| 49 | prog = opt_init(argc, argv, rand_options);
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| 50 | while ((o = opt_next()) != OPT_EOF) {
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| 51 | switch (o) {
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| 52 | case OPT_EOF:
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| 53 | case OPT_ERR:
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| 54 | opthelp:
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| 55 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 56 | goto end;
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| 57 | case OPT_HELP:
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| 58 | opt_help(rand_options);
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| 59 | ret = 0;
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| 60 | goto end;
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| 61 | case OPT_OUT:
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| 62 | outfile = opt_arg();
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| 63 | break;
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| 64 | case OPT_ENGINE:
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| 65 | e = setup_engine(opt_arg(), 0);
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| 66 | break;
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| 67 | case OPT_R_CASES:
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| 68 | if (!opt_rand(o))
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| 69 | goto end;
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| 70 | break;
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| 71 | case OPT_BASE64:
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| 72 | format = FORMAT_BASE64;
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| 73 | break;
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| 74 | case OPT_HEX:
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| 75 | format = FORMAT_TEXT;
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| 76 | break;
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| 77 | }
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| 78 | }
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| 79 | argc = opt_num_rest();
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| 80 | argv = opt_rest();
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| 81 | if (argc == 1) {
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| 82 | if (!opt_int(argv[0], &num) || num <= 0)
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| 83 | goto end;
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| 84 | } else if (argc > 0) {
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| 85 | BIO_printf(bio_err, "Extra arguments given.\n");
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| 86 | goto opthelp;
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| 87 | }
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| 88 |
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| 89 | out = bio_open_default(outfile, 'w', format);
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| 90 | if (out == NULL)
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| 91 | goto end;
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| 92 |
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| 93 | if (format == FORMAT_BASE64) {
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| 94 | BIO *b64 = BIO_new(BIO_f_base64());
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| 95 | if (b64 == NULL)
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| 96 | goto end;
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| 97 | out = BIO_push(b64, out);
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| 98 | }
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| 99 |
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| 100 | while (num > 0) {
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| 101 | unsigned char buf[4096];
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| 102 | int chunk;
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| 103 |
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| 104 | chunk = num;
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| 105 | if (chunk > (int)sizeof(buf))
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| 106 | chunk = sizeof(buf);
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| 107 | r = RAND_bytes(buf, chunk);
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| 108 | if (r <= 0)
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| 109 | goto end;
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| 110 | if (format != FORMAT_TEXT) {
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| 111 | if (BIO_write(out, buf, chunk) != chunk)
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| 112 | goto end;
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| 113 | } else {
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| 114 | for (i = 0; i < chunk; i++)
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| 115 | if (BIO_printf(out, "%02x", buf[i]) != 2)
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| 116 | goto end;
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| 117 | }
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| 118 | num -= chunk;
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| 119 | }
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| 120 | if (format == FORMAT_TEXT)
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| 121 | BIO_puts(out, "\n");
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| 122 | if (BIO_flush(out) <= 0)
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| 123 | goto end;
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| 124 |
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| 125 | ret = 0;
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| 126 |
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| 127 | end:
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| 128 | if (ret != 0)
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| 129 | ERR_print_errors(bio_err);
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| 130 | release_engine(e);
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| 131 | BIO_free_all(out);
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| 132 | return ret;
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| 133 | }
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