| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004-2018 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 <string.h> |
| 11 | |
| 12 | #include "apps.h" |
| 13 | #include "progs.h" |
| 14 | #include <openssl/bn.h> |
| 15 | |
| 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 |
| 19 | } OPTION_CHOICE; |
| 20 | |
| 21 | const OPTIONS prime_options[] = { |
| 22 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] [number...]\n"}, |
| 23 | {OPT_HELP_STR, 1, '-', |
| 24 | " number Number to check for primality\n"}, |
| 25 | {"help", OPT_HELP, '-', "Display this summary"}, |
| 26 | {"hex", OPT_HEX, '-', "Hex output"}, |
| 27 | {"generate", OPT_GENERATE, '-', "Generate a prime"}, |
| 28 | {"bits", OPT_BITS, 'p', "Size of number in bits"}, |
| 29 | {"safe", OPT_SAFE, '-', |
| 30 | "When used with -generate, generate a safe prime"}, |
| 31 | {"checks", OPT_CHECKS, 'p', "Number of checks"}, |
| 32 | {NULL} |
| 33 | }; |
| 34 | |
| 35 | int prime_main(int argc, char **argv) |
| 36 | { |
| 37 | BIGNUM *bn = NULL; |
| 38 | int hex = 0, checks = 20, generate = 0, bits = 0, safe = 0, ret = 1; |
| 39 | char *prog; |
| 40 | OPTION_CHOICE o; |
| 41 | |
| 42 | prog = opt_init(argc, argv, prime_options); |
| 43 | while ((o = opt_next()) != OPT_EOF) { |
| 44 | switch (o) { |
| 45 | case OPT_EOF: |
| 46 | case OPT_ERR: |
| 47 | opthelp: |
| 48 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| 49 | goto end; |
| 50 | case OPT_HELP: |
| 51 | opt_help(prime_options); |
| 52 | ret = 0; |
| 53 | goto end; |
| 54 | case OPT_HEX: |
| 55 | hex = 1; |
| 56 | break; |
| 57 | case OPT_GENERATE: |
| 58 | generate = 1; |
| 59 | break; |
| 60 | case OPT_BITS: |
| 61 | bits = atoi(opt_arg()); |
| 62 | break; |
| 63 | case OPT_SAFE: |
| 64 | safe = 1; |
| 65 | break; |
| 66 | case OPT_CHECKS: |
| 67 | checks = atoi(opt_arg()); |
| 68 | break; |
| 69 | } |
| 70 | } |
| 71 | argc = opt_num_rest(); |
| 72 | argv = opt_rest(); |
| 73 | |
| 74 | if (generate) { |
| 75 | if (argc != 0) { |
| 76 | BIO_printf(bio_err, "Extra arguments given.\n"); |
| 77 | goto opthelp; |
| 78 | } |
| 79 | } else if (argc == 0) { |
| 80 | BIO_printf(bio_err, "%s: No prime specified\n", prog); |
| 81 | goto opthelp; |
| 82 | } |
| 83 | |
| 84 | if (generate) { |
| 85 | char *s; |
| 86 | |
| 87 | if (!bits) { |
| 88 | BIO_printf(bio_err, "Specify the number of bits.\n"); |
| 89 | goto end; |
| 90 | } |
| 91 | bn = BN_new(); |
| 92 | if (bn == NULL) { |
| 93 | BIO_printf(bio_err, "Out of memory.\n"); |
| 94 | goto end; |
| 95 | } |
| 96 | if (!BN_generate_prime_ex(bn, bits, safe, NULL, NULL, NULL)) { |
| 97 | BIO_printf(bio_err, "Failed to generate prime.\n"); |
| 98 | goto end; |
| 99 | } |
| 100 | s = hex ? BN_bn2hex(bn) : BN_bn2dec(bn); |
| 101 | if (s == NULL) { |
| 102 | BIO_printf(bio_err, "Out of memory.\n"); |
| 103 | goto end; |
| 104 | } |
| 105 | BIO_printf(bio_out, "%s\n", s); |
| 106 | OPENSSL_free(s); |
| 107 | } else { |
| 108 | for ( ; *argv; argv++) { |
| 109 | int r; |
| 110 | |
| 111 | if (hex) |
| 112 | r = BN_hex2bn(&bn, argv[0]); |
| 113 | else |
| 114 | r = BN_dec2bn(&bn, argv[0]); |
| 115 | |
| 116 | if (!r) { |
| 117 | BIO_printf(bio_err, "Failed to process value (%s)\n", argv[0]); |
| 118 | goto end; |
| 119 | } |
| 120 | |
| 121 | BN_print(bio_out, bn); |
| 122 | BIO_printf(bio_out, " (%s) %s prime\n", |
| 123 | argv[0], |
| 124 | BN_is_prime_ex(bn, checks, NULL, NULL) |
| 125 | ? "is" : "is not"); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | ret = 0; |
| 130 | end: |
| 131 | BN_free(bn); |
| 132 | return ret; |
| 133 | } |