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 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
