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git.ipfire.org Git - thirdparty/openssl.git/blob - apps/prime.c
2 * Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (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
14 #include <openssl/bn.h>
16 typedef enum OPTION_choice
{
17 OPT_ERR
= -1, OPT_EOF
= 0, OPT_HELP
,
18 OPT_HEX
, OPT_GENERATE
, OPT_BITS
, OPT_SAFE
, OPT_CHECKS
21 const OPTIONS prime_options
[] = {
22 {OPT_HELP_STR
, 1, '-', "Usage: %s [options] [number...]\n"},
24 OPT_SECTION("General"),
25 {"help", OPT_HELP
, '-', "Display this summary"},
26 {"bits", OPT_BITS
, 'p', "Size of number in bits"},
27 {"checks", OPT_CHECKS
, 'p', "Number of checks"},
29 OPT_SECTION("Output"),
30 {"hex", OPT_HEX
, '-', "Hex output"},
31 {"generate", OPT_GENERATE
, '-', "Generate a prime"},
32 {"safe", OPT_SAFE
, '-',
33 "When used with -generate, generate a safe prime"},
36 {"number", 0, 0, "Number(s) to check for primality if not generating"},
40 int prime_main(int argc
, char **argv
)
43 int hex
= 0, generate
= 0, bits
= 0, safe
= 0, ret
= 1;
47 prog
= opt_init(argc
, argv
, prime_options
);
48 while ((o
= opt_next()) != OPT_EOF
) {
53 BIO_printf(bio_err
, "%s: Use -help for summary.\n", prog
);
56 opt_help(prime_options
);
66 bits
= atoi(opt_arg());
72 /* ignore parameter and argument */
77 argc
= opt_num_rest();
82 BIO_printf(bio_err
, "Extra arguments given.\n");
85 } else if (argc
== 0) {
86 BIO_printf(bio_err
, "%s: No prime specified\n", prog
);
94 BIO_printf(bio_err
, "Specify the number of bits.\n");
99 BIO_printf(bio_err
, "Out of memory.\n");
102 if (!BN_generate_prime_ex(bn
, bits
, safe
, NULL
, NULL
, NULL
)) {
103 BIO_printf(bio_err
, "Failed to generate prime.\n");
106 s
= hex
? BN_bn2hex(bn
) : BN_bn2dec(bn
);
108 BIO_printf(bio_err
, "Out of memory.\n");
111 BIO_printf(bio_out
, "%s\n", s
);
114 for ( ; *argv
; argv
++) {
118 r
= BN_hex2bn(&bn
, argv
[0]);
120 r
= BN_dec2bn(&bn
, argv
[0]);
123 BIO_printf(bio_err
, "Failed to process value (%s)\n", argv
[0]);
127 BN_print(bio_out
, bn
);
128 BIO_printf(bio_out
, " (%s) %s prime\n",
130 BN_check_prime(bn
, NULL
, NULL
)