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 <string>
16 #include <vector>
17
18 #include <stdint.h>
19 #include <stdlib.h>
20
21 #include <openssl/ssl.h>
22
23 #include "internal.h"
24
25
Ciphers(const std::vector<std::string> & args)26 bool Ciphers(const std::vector<std::string> &args) {
27 bool openssl_name = false;
28 if (args.size() == 2 && args[0] == "-openssl-name") {
29 openssl_name = true;
30 } else if (args.size() != 1) {
31 fprintf(stderr,
32 "Usage: bssl ciphers [-openssl-name] <cipher suite string>\n");
33 return false;
34 }
35
36 const std::string &ciphers_string = args.back();
37
38 bssl::UniquePtr<SSL_CTX> ctx(SSL_CTX_new(TLS_method()));
39 if (!SSL_CTX_set_strict_cipher_list(ctx.get(), ciphers_string.c_str())) {
40 fprintf(stderr, "Failed to parse cipher suite config.\n");
41 ERR_print_errors_fp(stderr);
42 return false;
43 }
44
45 STACK_OF(SSL_CIPHER) *ciphers = SSL_CTX_get_ciphers(ctx.get());
46
47 bool last_in_group = false;
48 for (size_t i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
49 bool in_group = SSL_CTX_cipher_in_group(ctx.get(), i);
50 const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(ciphers, i);
51
52 if (in_group && !last_in_group) {
53 printf("[\n ");
54 } else if (last_in_group) {
55 printf(" ");
56 }
57
58 printf("%s\n", openssl_name ? SSL_CIPHER_get_name(cipher)
59 : SSL_CIPHER_standard_name(cipher));
60
61 if (!in_group && last_in_group) {
62 printf("]\n");
63 }
64 last_in_group = in_group;
65 }
66
67 return true;
68 }
69