1 // Copyright 2015 The BoringSSL Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
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 "internal.h"
22
23
24 static const struct argument kArguments[] = {
25 {
26 "-bits", kOptionalArgument,
27 "The number of bits in the modulus (default: 2048)",
28 },
29 {
30 "", kOptionalArgument, "",
31 },
32 };
33
GenerateRSAKey(const std::vector<std::string> & args)34 bool GenerateRSAKey(const std::vector<std::string> &args) {
35 std::map<std::string, std::string> args_map;
36
37 if (!ParseKeyValueArguments(&args_map, args, kArguments)) {
38 PrintUsage(kArguments);
39 return false;
40 }
41
42 unsigned bits;
43 if (!GetUnsigned(&bits, "-bits", 2048, args_map)) {
44 PrintUsage(kArguments);
45 return false;
46 }
47
48 bssl::UniquePtr<RSA> rsa(RSA_new());
49 bssl::UniquePtr<BIGNUM> e(BN_new());
50 bssl::UniquePtr<BIO> bio(BIO_new_fp(stdout, BIO_NOCLOSE));
51
52 if (!BN_set_word(e.get(), RSA_F4) ||
53 !RSA_generate_key_ex(rsa.get(), bits, e.get(), NULL) ||
54 !PEM_write_bio_RSAPrivateKey(bio.get(), rsa.get(), NULL /* cipher */,
55 NULL /* key */, 0 /* key len */,
56 NULL /* password callback */,
57 NULL /* callback arg */)) {
58 ERR_print_errors_fp(stderr);
59 return false;
60 }
61
62 return true;
63 }
64