apps/ciphers.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include "apps.h"
  14 #include <openssl/err.h>
  15 #include <openssl/ssl.h>
  16
  17 typedef enum OPTION_choice {
  18     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  19     OPT_STDNAME,
  20     OPT_SSL3,
  21     OPT_TLS1,
  22     OPT_TLS1_1,
  23     OPT_TLS1_2,
  24     OPT_TLS1_3,
  25     OPT_PSK,
  26     OPT_SRP,
  27     OPT_V, OPT_UPPER_V, OPT_S
  28 } OPTION_CHOICE;
  29
  30 const OPTIONS ciphers_options[] = {
  31     {"help", OPT_HELP, '-', "Display this summary"},
  32     {"v", OPT_V, '-', "Verbose listing of the SSL/TLS ciphers"},
  33     {"V", OPT_UPPER_V, '-', "Even more verbose"},
  34     {"s", OPT_S, '-', "Only supported ciphers"},
  35 #ifndef OPENSSL_NO_SSL3
  36     {"ssl3", OPT_SSL3, '-', "SSL3 mode"},
  37 #endif
  38 #ifndef OPENSSL_NO_TLS1
  39     {"tls1", OPT_TLS1, '-', "TLS1 mode"},
  40 #endif
  41 #ifndef OPENSSL_NO_TLS1_1
  42     {"tls1_1", OPT_TLS1_1, '-', "TLS1.1 mode"},
  43 #endif
  44 #ifndef OPENSSL_NO_TLS1_2
  45     {"tls1_2", OPT_TLS1_2, '-', "TLS1.2 mode"},
  46 #endif
  47 #ifndef OPENSSL_NO_TLS1_3
  48     {"tls1_3", OPT_TLS1_3, '-', "TLS1.3 mode"},
  49 #endif
  50 #ifndef OPENSSL_NO_SSL_TRACE
  51     {"stdname", OPT_STDNAME, '-', "Show standard cipher names"},
  52 #endif
  53 #ifndef OPENSSL_NO_PSK
  54     {"psk", OPT_PSK, '-', "include ciphersuites requiring PSK"},
  55 #endif
  56 #ifndef OPENSSL_NO_SRP
  57     {"srp", OPT_SRP, '-', "include ciphersuites requiring SRP"},
  58 #endif
  59     {NULL}
  60 };
  61
  62 #ifndef OPENSSL_NO_PSK
  63 static unsigned int dummy_psk(SSL *ssl, const char *hint, char *identity,
  64                               unsigned int max_identity_len,
  65                               unsigned char *psk,
  66                               unsigned int max_psk_len)
  67 {
  68     return 0;
  69 }
  70 #endif
  71 #ifndef OPENSSL_NO_SRP
  72 static char *dummy_srp(SSL *ssl, void *arg)
  73 {
  74     return "";
  75 }
  76 #endif
  77
  78 int ciphers_main(int argc, char **argv)
  79 {
  80     SSL_CTX *ctx = NULL;
  81     SSL *ssl = NULL;
  82     STACK_OF(SSL_CIPHER) *sk = NULL;
  83     const SSL_METHOD *meth = TLS_server_method();
  84     int ret = 1, i, verbose = 0, Verbose = 0, use_supported = 0;
  85 #ifndef OPENSSL_NO_SSL_TRACE
  86     int stdname = 0;
  87 #endif
  88 #ifndef OPENSSL_NO_PSK
  89     int psk = 0;
  90 #endif
  91 #ifndef OPENSSL_NO_SRP
  92     int srp = 0;
  93 #endif
  94     const char *p;
  95     char *ciphers = NULL, *prog;
  96     char buf[512];
  97     OPTION_CHOICE o;
  98     int min_version = 0, max_version = 0;
  99
 100     prog = opt_init(argc, argv, ciphers_options);
 101     while ((o = opt_next()) != OPT_EOF) {
 102         switch (o) {
 103         case OPT_EOF:
 104         case OPT_ERR:
 105  opthelp:
 106             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 107             goto end;
 108         case OPT_HELP:
 109             opt_help(ciphers_options);
 110             ret = 0;
 111             goto end;
 112         case OPT_V:
 113             verbose = 1;
 114             break;
 115         case OPT_UPPER_V:
 116             verbose = Verbose = 1;
 117             break;
 118         case OPT_S:
 119             use_supported = 1;
 120             break;
 121         case OPT_STDNAME:
 122 #ifndef OPENSSL_NO_SSL_TRACE
 123             stdname = verbose = 1;
 124 #endif
 125             break;
 126         case OPT_SSL3:
 127             min_version = SSL3_VERSION;
 128             max_version = SSL3_VERSION;
 129             break;
 130         case OPT_TLS1:
 131             min_version = TLS1_VERSION;
 132             max_version = TLS1_VERSION;
 133             break;
 134         case OPT_TLS1_1:
 135             min_version = TLS1_1_VERSION;
 136             max_version = TLS1_1_VERSION;
 137             break;
 138         case OPT_TLS1_2:
 139             min_version = TLS1_2_VERSION;
 140             max_version = TLS1_2_VERSION;
 141             break;
 142         case OPT_TLS1_3:
 143             min_version = TLS1_3_VERSION;
 144             max_version = TLS1_3_VERSION;
 145             break;
 146         case OPT_PSK:
 147 #ifndef OPENSSL_NO_PSK
 148             psk = 1;
 149 #endif
 150             break;
 151         case OPT_SRP:
 152 #ifndef OPENSSL_NO_SRP
 153             srp = 1;
 154 #endif
 155             break;
 156         }
 157     }
 158     argv = opt_rest();
 159     argc = opt_num_rest();
 160
 161     if (argc == 1)
 162         ciphers = *argv;
 163     else if (argc != 0)
 164         goto opthelp;
 165
 166     ctx = SSL_CTX_new(meth);
 167     if (ctx == NULL)
 168         goto err;
 169     if (SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
 170         goto err;
 171     if (SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
 172         goto err;
 173
 174 #ifndef OPENSSL_NO_PSK
 175     if (psk)
 176         SSL_CTX_set_psk_client_callback(ctx, dummy_psk);
 177 #endif
 178 #ifndef OPENSSL_NO_SRP
 179     if (srp)
 180         SSL_CTX_set_srp_client_pwd_callback(ctx, dummy_srp);
 181 #endif
 182     if (ciphers != NULL) {
 183         if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
 184             BIO_printf(bio_err, "Error in cipher list\n");
 185             goto err;
 186         }
 187     }
 188     ssl = SSL_new(ctx);
 189     if (ssl == NULL)
 190         goto err;
 191
 192     if (use_supported)
 193         sk = SSL_get1_supported_ciphers(ssl);
 194     else
 195         sk = SSL_get_ciphers(ssl);
 196
 197     if (!verbose) {
 198         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 199             const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
 200             p = SSL_CIPHER_get_name(c);
 201             if (p == NULL)
 202                 break;
 203             if (i != 0)
 204                 BIO_printf(bio_out, ":");
 205             BIO_printf(bio_out, "%s", p);
 206         }
 207         BIO_printf(bio_out, "\n");
 208     } else {
 209
 210         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 211             const SSL_CIPHER *c;
 212
 213             c = sk_SSL_CIPHER_value(sk, i);
 214
 215             if (Verbose) {
 216                 unsigned long id = SSL_CIPHER_get_id(c);
 217                 int id0 = (int)(id >> 24);
 218                 int id1 = (int)((id >> 16) & 0xffL);
 219                 int id2 = (int)((id >> 8) & 0xffL);
 220                 int id3 = (int)(id & 0xffL);
 221
 222                 if ((id & 0xff000000L) == 0x03000000L)
 223                     BIO_printf(bio_out, "          0x%02X,0x%02X - ", id2, id3); /* SSL3
 224                                                                                   * cipher */
 225                 else
 226                     BIO_printf(bio_out, "0x%02X,0x%02X,0x%02X,0x%02X - ", id0, id1, id2, id3); /* whatever */
 227             }
 228 #ifndef OPENSSL_NO_SSL_TRACE
 229             if (stdname) {
 230                 const char *nm = SSL_CIPHER_standard_name(c);
 231                 if (nm == NULL)
 232                     nm = "UNKNOWN";
 233                 BIO_printf(bio_out, "%s - ", nm);
 234             }
 235 #endif
 236             BIO_puts(bio_out, SSL_CIPHER_description(c, buf, sizeof buf));
 237         }
 238     }
 239
 240     ret = 0;
 241     goto end;
 242  err:
 243     ERR_print_errors(bio_err);
 244  end:
 245     if (use_supported)
 246         sk_SSL_CIPHER_free(sk);
 247     SSL_CTX_free(ctx);
 248     SSL_free(ssl);
 249     return (ret);
 250 }