1/* Copyright (c) 2015, Google Inc.
2 *
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
14
15#include <openssl/bio.h>
16#include <openssl/bn.h>
17#include <openssl/err.h>
18#include <openssl/pem.h>
19#include <openssl/rsa.h>
20
21#include "../crypto/test/scoped_types.h"
22#include "internal.h"
23
24
25static const struct argument kArguments[] = {
26    {
27     "-nprimes", kOptionalArgument,
28     "The number of primes to generate (default: 2)",
29    },
30    {
31     "-bits", kOptionalArgument,
32     "The number of bits in the modulus (default: 2048)",
33    },
34    {
35     "", kOptionalArgument, "",
36    },
37};
38
39bool GenerateRSAKey(const std::vector<std::string> &args) {
40  std::map<std::string, std::string> args_map;
41
42  if (!ParseKeyValueArguments(&args_map, args, kArguments)) {
43    PrintUsage(kArguments);
44    return false;
45  }
46
47  unsigned bits, nprimes = 0;
48  if (!GetUnsigned(&bits, "-bits", 2048, args_map) ||
49      !GetUnsigned(&nprimes, "-nprimes", 2, args_map)) {
50    PrintUsage(kArguments);
51    return false;
52  }
53
54  ScopedRSA rsa(RSA_new());
55  ScopedBIGNUM e(BN_new());
56  ScopedBIO bio(BIO_new_fp(stdout, BIO_NOCLOSE));
57
58  if (!BN_set_word(e.get(), RSA_F4) ||
59      !RSA_generate_multi_prime_key(rsa.get(), bits, nprimes, e.get(), NULL) ||
60      !PEM_write_bio_RSAPrivateKey(bio.get(), rsa.get(), NULL /* cipher */,
61                                   NULL /* key */, 0 /* key len */,
62                                   NULL /* password callback */,
63                                   NULL /* callback arg */)) {
64    ERR_print_errors_fp(stderr);
65    return false;
66  }
67
68  return true;
69}
70