| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use |
| 5 | * this file except in compliance with the License. You can obtain a copy |
| 6 | * in the file LICENSE in the source distribution or at |
| 7 | * https://www.openssl.org/source/license.html |
| 8 | */ |
| 9 | |
| 10 | #include "apps.h" |
| 11 | #include "progs.h" |
| 12 | |
| 13 | #include <ctype.h> |
| 14 | #include <stdio.h> |
| 15 | #include <string.h> |
| 16 | |
| 17 | #include <openssl/bio.h> |
| 18 | #include <openssl/err.h> |
| 19 | #include <openssl/rand.h> |
| 20 | |
| 21 | typedef enum OPTION_choice { |
| 22 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, |
| 23 | OPT_OUT, OPT_ENGINE, OPT_BASE64, OPT_HEX, |
| 24 | OPT_R_ENUM |
| 25 | } OPTION_CHOICE; |
| 26 | |
| 27 | const OPTIONS rand_options[] = { |
| 28 | {OPT_HELP_STR, 1, '-', "Usage: %s [flags] num\n"}, |
| 29 | {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, |
| 30 | {"help", OPT_HELP, '-', "Display this summary"}, |
| 31 | {"out", OPT_OUT, '>', "Output file"}, |
| 32 | OPT_R_OPTIONS, |
| 33 | {"base64", OPT_BASE64, '-', "Base64 encode output"}, |
| 34 | {"hex", OPT_HEX, '-', "Hex encode output"}, |
| 35 | #ifndef OPENSSL_NO_ENGINE |
| 36 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"}, |
| 37 | #endif |
| 38 | {NULL} |
| 39 | }; |
| 40 | |
| 41 | int rand_main(int argc, char **argv) |
| 42 | { |
| 43 | ENGINE *e = NULL; |
| 44 | BIO *out = NULL; |
| 45 | char *outfile = NULL, *prog; |
| 46 | OPTION_CHOICE o; |
| 47 | int format = FORMAT_BINARY, i, num = -1, r, ret = 1; |
| 48 | |
| 49 | prog = opt_init(argc, argv, rand_options); |
| 50 | while ((o = opt_next()) != OPT_EOF) { |
| 51 | switch (o) { |
| 52 | case OPT_EOF: |
| 53 | case OPT_ERR: |
| 54 | opthelp: |
| 55 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| 56 | goto end; |
| 57 | case OPT_HELP: |
| 58 | opt_help(rand_options); |
| 59 | ret = 0; |
| 60 | goto end; |
| 61 | case OPT_OUT: |
| 62 | outfile = opt_arg(); |
| 63 | break; |
| 64 | case OPT_ENGINE: |
| 65 | e = setup_engine(opt_arg(), 0); |
| 66 | break; |
| 67 | case OPT_R_CASES: |
| 68 | if (!opt_rand(o)) |
| 69 | goto end; |
| 70 | break; |
| 71 | case OPT_BASE64: |
| 72 | format = FORMAT_BASE64; |
| 73 | break; |
| 74 | case OPT_HEX: |
| 75 | format = FORMAT_TEXT; |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | argc = opt_num_rest(); |
| 80 | argv = opt_rest(); |
| 81 | if (argc == 1) { |
| 82 | if (!opt_int(argv[0], &num) || num <= 0) |
| 83 | goto end; |
| 84 | } else if (argc > 0) { |
| 85 | BIO_printf(bio_err, "Extra arguments given.\n"); |
| 86 | goto opthelp; |
| 87 | } |
| 88 | |
| 89 | out = bio_open_default(outfile, 'w', format); |
| 90 | if (out == NULL) |
| 91 | goto end; |
| 92 | |
| 93 | if (format == FORMAT_BASE64) { |
| 94 | BIO *b64 = BIO_new(BIO_f_base64()); |
| 95 | if (b64 == NULL) |
| 96 | goto end; |
| 97 | out = BIO_push(b64, out); |
| 98 | } |
| 99 | |
| 100 | while (num > 0) { |
| 101 | unsigned char buf[4096]; |
| 102 | int chunk; |
| 103 | |
| 104 | chunk = num; |
| 105 | if (chunk > (int)sizeof(buf)) |
| 106 | chunk = sizeof(buf); |
| 107 | r = RAND_bytes(buf, chunk); |
| 108 | if (r <= 0) |
| 109 | goto end; |
| 110 | if (format != FORMAT_TEXT) { |
| 111 | if (BIO_write(out, buf, chunk) != chunk) |
| 112 | goto end; |
| 113 | } else { |
| 114 | for (i = 0; i < chunk; i++) |
| 115 | if (BIO_printf(out, "%02x", buf[i]) != 2) |
| 116 | goto end; |
| 117 | } |
| 118 | num -= chunk; |
| 119 | } |
| 120 | if (format == FORMAT_TEXT) |
| 121 | BIO_puts(out, "\n"); |
| 122 | if (BIO_flush(out) <= 0) |
| 123 | goto end; |
| 124 | |
| 125 | ret = 0; |
| 126 | |
| 127 | end: |
| 128 | if (ret != 0) |
| 129 | ERR_print_errors(bio_err); |
| 130 | release_engine(e); |
| 131 | BIO_free_all(out); |
| 132 | return ret; |
| 133 | } |