134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
/*
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* Copyright 2004-2018 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 <string.h>
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#include "apps.h"
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#include "progs.h"
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#include <openssl/bn.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_HEX, OPT_GENERATE, OPT_BITS, OPT_SAFE, OPT_CHECKS
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} OPTION_CHOICE;
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const OPTIONS prime_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [options] [number...]\n"},
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{OPT_HELP_STR, 1, '-',
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" number Number to check for primality\n"},
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{"help", OPT_HELP, '-', "Display this summary"},
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{"hex", OPT_HEX, '-', "Hex output"},
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{"generate", OPT_GENERATE, '-', "Generate a prime"},
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{"bits", OPT_BITS, 'p', "Size of number in bits"},
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{"safe", OPT_SAFE, '-',
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"When used with -generate, generate a safe prime"},
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{"checks", OPT_CHECKS, 'p', "Number of checks"},
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{NULL}
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};
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int prime_main(int argc, char **argv)
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{
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BIGNUM *bn = NULL;
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int hex = 0, checks = 20, generate = 0, bits = 0, safe = 0, ret = 1;
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char *prog;
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OPTION_CHOICE o;
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prog = opt_init(argc, argv, prime_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(prime_options);
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ret = 0;
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goto end;
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case OPT_HEX:
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hex = 1;
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break;
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case OPT_GENERATE:
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generate = 1;
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break;
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case OPT_BITS:
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bits = atoi(opt_arg());
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break;
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case OPT_SAFE:
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safe = 1;
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break;
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case OPT_CHECKS:
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checks = atoi(opt_arg());
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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 (generate) {
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if (argc != 0) {
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BIO_printf(bio_err, "Extra arguments given.\n");
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goto opthelp;
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}
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} else if (argc == 0) {
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BIO_printf(bio_err, "%s: No prime specified\n", prog);
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goto opthelp;
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}
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if (generate) {
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char *s;
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if (!bits) {
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BIO_printf(bio_err, "Specify the number of bits.\n");
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goto end;
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}
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bn = BN_new();
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if (bn == NULL) {
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BIO_printf(bio_err, "Out of memory.\n");
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goto end;
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}
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if (!BN_generate_prime_ex(bn, bits, safe, NULL, NULL, NULL)) {
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BIO_printf(bio_err, "Failed to generate prime.\n");
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goto end;
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}
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s = hex ? BN_bn2hex(bn) : BN_bn2dec(bn);
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if (s == NULL) {
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BIO_printf(bio_err, "Out of memory.\n");
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goto end;
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}
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BIO_printf(bio_out, "%s\n", s);
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OPENSSL_free(s);
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} else {
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for ( ; *argv; argv++) {
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int r;
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if (hex)
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r = BN_hex2bn(&bn, argv[0]);
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else
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r = BN_dec2bn(&bn, argv[0]);
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if (!r) {
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BIO_printf(bio_err, "Failed to process value (%s)\n", argv[0]);
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goto end;
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}
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BN_print(bio_out, bn);
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BIO_printf(bio_out, " (%s) %s prime\n",
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argv[0],
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BN_is_prime_ex(bn, checks, NULL, NULL)
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? "is" : "is not");
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}
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}
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ret = 0;
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end:
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BN_free(bn);
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return ret;
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}
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