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 if (args.size() != 1) {
28 fprintf(stderr, "Usage: bssl ciphers <cipher suite string>\n");
29 return false;
30 }
31
32 const std::string &ciphers_string = args.back();
33
34 bssl::UniquePtr<SSL_CTX> ctx(SSL_CTX_new(SSLv23_client_method()));
35 if (!SSL_CTX_set_strict_cipher_list(ctx.get(), ciphers_string.c_str())) {
36 fprintf(stderr, "Failed to parse cipher suite config.\n");
37 ERR_print_errors_fp(stderr);
38 return false;
39 }
40
41 const struct ssl_cipher_preference_list_st *pref_list = ctx->cipher_list;
42 STACK_OF(SSL_CIPHER) *ciphers = pref_list->ciphers;
43
44 bool last_in_group = false;
45 for (size_t i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
46 bool in_group = pref_list->in_group_flags[i];
47 const SSL_CIPHER *cipher = sk_SSL_CIPHER_value(ciphers, i);
48
49 if (in_group && !last_in_group) {
50 printf("[\n ");
51 } else if (last_in_group) {
52 printf(" ");
53 }
54
55 printf("%s\n", SSL_CIPHER_standard_name(cipher));
56
57 if (!in_group && last_in_group) {
58 printf("]\n");
59 }
60 last_in_group = in_group;
61 }
62
63 return true;
64 }
65