[331] | 1 | /*
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| 2 | * Copyright 2004-2016 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 <string.h>
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| 11 |
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| 12 | #include "apps.h"
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| 13 | #include <openssl/bn.h>
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| 14 |
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| 15 | typedef enum OPTION_choice {
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| 16 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 17 | OPT_HEX, OPT_GENERATE, OPT_BITS, OPT_SAFE, OPT_CHECKS
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| 18 | } OPTION_CHOICE;
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| 19 |
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| 20 | OPTIONS prime_options[] = {
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| 21 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] [number...]\n"},
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| 22 | {OPT_HELP_STR, 1, '-',
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| 23 | " number Number to check for primality\n"},
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| 24 | {"help", OPT_HELP, '-', "Display this summary"},
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| 25 | {"hex", OPT_HEX, '-', "Hex output"},
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| 26 | {"generate", OPT_GENERATE, '-', "Generate a prime"},
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| 27 | {"bits", OPT_BITS, 'p', "Size of number in bits"},
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| 28 | {"safe", OPT_SAFE, '-',
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| 29 | "When used with -generate, generate a safe prime"},
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| 30 | {"checks", OPT_CHECKS, 'p', "Number of checks"},
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| 31 | {NULL}
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| 32 | };
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| 33 |
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| 34 | int prime_main(int argc, char **argv)
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| 35 | {
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| 36 | BIGNUM *bn = NULL;
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| 37 | int hex = 0, checks = 20, generate = 0, bits = 0, safe = 0, ret = 1;
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| 38 | char *prog;
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| 39 | OPTION_CHOICE o;
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| 40 |
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| 41 | prog = opt_init(argc, argv, prime_options);
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| 42 | while ((o = opt_next()) != OPT_EOF) {
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| 43 | switch (o) {
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| 44 | case OPT_EOF:
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| 45 | case OPT_ERR:
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| 46 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 47 | goto end;
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| 48 | case OPT_HELP:
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| 49 | opt_help(prime_options);
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| 50 | ret = 0;
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| 51 | goto end;
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| 52 | case OPT_HEX:
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| 53 | hex = 1;
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| 54 | break;
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| 55 | case OPT_GENERATE:
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| 56 | generate = 1;
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| 57 | break;
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| 58 | case OPT_BITS:
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| 59 | bits = atoi(opt_arg());
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| 60 | break;
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| 61 | case OPT_SAFE:
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| 62 | safe = 1;
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| 63 | break;
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| 64 | case OPT_CHECKS:
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| 65 | checks = atoi(opt_arg());
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| 66 | break;
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| 67 | }
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| 68 | }
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| 69 | argc = opt_num_rest();
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| 70 | argv = opt_rest();
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| 71 |
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| 72 | if (argc == 0 && !generate) {
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| 73 | BIO_printf(bio_err, "%s: No prime specified\n", prog);
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| 74 | goto end;
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| 75 | }
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| 76 |
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| 77 | if (generate) {
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| 78 | char *s;
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| 79 |
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| 80 | if (!bits) {
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| 81 | BIO_printf(bio_err, "Specify the number of bits.\n");
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| 82 | goto end;
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| 83 | }
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| 84 | bn = BN_new();
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| 85 | if (bn == NULL) {
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| 86 | BIO_printf(bio_err, "Out of memory.\n");
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| 87 | goto end;
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| 88 | }
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| 89 | if (!BN_generate_prime_ex(bn, bits, safe, NULL, NULL, NULL)) {
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| 90 | BIO_printf(bio_err, "Failed to generate prime.\n");
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| 91 | goto end;
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| 92 | }
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| 93 | s = hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
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| 94 | if (s == NULL) {
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| 95 | BIO_printf(bio_err, "Out of memory.\n");
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| 96 | goto end;
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| 97 | }
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| 98 | BIO_printf(bio_out, "%s\n", s);
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| 99 | OPENSSL_free(s);
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| 100 | } else {
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| 101 | for ( ; *argv; argv++) {
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| 102 | int r;
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| 103 |
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| 104 | if (hex)
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| 105 | r = BN_hex2bn(&bn, argv[0]);
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| 106 | else
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| 107 | r = BN_dec2bn(&bn, argv[0]);
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| 108 |
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| 109 | if(!r) {
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| 110 | BIO_printf(bio_err, "Failed to process value (%s)\n", argv[0]);
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| 111 | goto end;
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| 112 | }
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| 113 |
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| 114 | BN_print(bio_out, bn);
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| 115 | BIO_printf(bio_out, " (%s) %s prime\n",
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| 116 | argv[0],
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| 117 | BN_is_prime_ex(bn, checks, NULL, NULL)
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| 118 | ? "is" : "is not");
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| 119 | }
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| 120 | }
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| 121 |
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| 122 | ret = 0;
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| 123 | end:
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| 124 | BN_free(bn);
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| 125 | return ret;
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| 126 | }
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