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 "internal.h"
22
23
24 struct FileCloser {
operator ()FileCloser25 void operator()(FILE *file) {
26 fclose(file);
27 }
28 };
29
30 using ScopedFILE = std::unique_ptr<FILE, FileCloser>;
31
32 static const struct argument kArguments[] = {
33 {
34 "-out-public", kRequiredArgument, "The file to write the public key to",
35 },
36 {
37 "-out-private", kRequiredArgument,
38 "The file to write the private key to",
39 },
40 {
41 "", kOptionalArgument, "",
42 },
43 };
44
WriteToFile(const std::string & path,const uint8_t * in,size_t in_len)45 static bool WriteToFile(const std::string &path, const uint8_t *in,
46 size_t in_len) {
47 ScopedFILE file(fopen(path.c_str(), "wb"));
48 if (!file) {
49 fprintf(stderr, "Failed to open '%s': %s\n", path.c_str(), strerror(errno));
50 return false;
51 }
52 if (fwrite(in, in_len, 1, file.get()) != 1) {
53 fprintf(stderr, "Failed to write to '%s': %s\n", path.c_str(),
54 strerror(errno));
55 return false;
56 }
57 return true;
58 }
59
GenerateEd25519Key(const std::vector<std::string> & args)60 bool GenerateEd25519Key(const std::vector<std::string> &args) {
61 std::map<std::string, std::string> args_map;
62
63 if (!ParseKeyValueArguments(&args_map, args, kArguments)) {
64 PrintUsage(kArguments);
65 return false;
66 }
67
68 uint8_t public_key[32], private_key[64];
69 ED25519_keypair(public_key, private_key);
70
71 return WriteToFile(args_map["-out-public"], public_key, sizeof(public_key)) &&
72 WriteToFile(args_map["-out-private"], private_key,
73 sizeof(private_key));
74 }
75