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/curve25519.h>
16
17#include <errno.h>
18#include <stdio.h>
19#include <string.h>
20
21#include "../crypto/test/scoped_types.h"
22#include "internal.h"
23
24
25static const struct argument kArguments[] = {
26    {
27        "-out-public", kRequiredArgument, "The file to write the public key to",
28    },
29    {
30        "-out-private", kRequiredArgument,
31        "The file to write the private key to",
32    },
33    {
34        "", kOptionalArgument, "",
35    },
36};
37
38static bool WriteToFile(const std::string &path, const uint8_t *in,
39                        size_t in_len) {
40  ScopedFILE file(fopen(path.c_str(), "wb"));
41  if (!file) {
42    fprintf(stderr, "Failed to open '%s': %s\n", path.c_str(), strerror(errno));
43    return false;
44  }
45  if (fwrite(in, in_len, 1, file.get()) != 1) {
46    fprintf(stderr, "Failed to write to '%s': %s\n", path.c_str(),
47            strerror(errno));
48    return false;
49  }
50  return true;
51}
52
53bool GenerateEd25519Key(const std::vector<std::string> &args) {
54  std::map<std::string, std::string> args_map;
55
56  if (!ParseKeyValueArguments(&args_map, args, kArguments)) {
57    PrintUsage(kArguments);
58    return false;
59  }
60
61  uint8_t public_key[32], private_key[64];
62  ED25519_keypair(public_key, private_key);
63
64  return WriteToFile(args_map["-out-public"], public_key, sizeof(public_key)) &&
65         WriteToFile(args_map["-out-private"], private_key,
66                     sizeof(private_key));
67}
68