apps/ciphers.c

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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 "progs.h"
  15 #include <openssl/err.h>
  16 #include <openssl/ssl.h>
  17
  18 typedef enum OPTION_choice {
  19     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  20     OPT_STDNAME,
  21     OPT_CONVERT,
  22     OPT_SSL3,
  23     OPT_TLS1,
  24     OPT_TLS1_1,
  25     OPT_TLS1_2,
  26     OPT_TLS1_3,
  27     OPT_PSK,
  28     OPT_SRP,
  29     OPT_CIPHERSUITES,
  30     OPT_V, OPT_UPPER_V, OPT_S
  31 } OPTION_CHOICE;
  32
  33 const OPTIONS ciphers_options[] = {
  34     {OPT_HELP_STR, 1, '-', "Usage: %s [options] [cipher]\n"},
  35
  36     OPT_SECTION("General"),
  37     {"help", OPT_HELP, '-', "Display this summary"},
  38
  39     OPT_SECTION("Output"),
  40     {"v", OPT_V, '-', "Verbose listing of the SSL/TLS ciphers"},
  41     {"V", OPT_UPPER_V, '-', "Even more verbose"},
  42     {"stdname", OPT_STDNAME, '-', "Show standard cipher names"},
  43     {"convert", OPT_CONVERT, 's', "Convert standard name into OpenSSL name"},
  44
  45     OPT_SECTION("Cipher specification"),
  46     {"s", OPT_S, '-', "Only supported ciphers"},
  47 #ifndef OPENSSL_NO_SSL3
  48     {"ssl3", OPT_SSL3, '-', "Ciphers compatible with SSL3"},
  49 #endif
  50 #ifndef OPENSSL_NO_TLS1
  51     {"tls1", OPT_TLS1, '-', "Ciphers compatible with TLS1"},
  52 #endif
  53 #ifndef OPENSSL_NO_TLS1_1
  54     {"tls1_1", OPT_TLS1_1, '-', "Ciphers compatible with TLS1.1"},
  55 #endif
  56 #ifndef OPENSSL_NO_TLS1_2
  57     {"tls1_2", OPT_TLS1_2, '-', "Ciphers compatible with TLS1.2"},
  58 #endif
  59 #ifndef OPENSSL_NO_TLS1_3
  60     {"tls1_3", OPT_TLS1_3, '-', "Ciphers compatible with TLS1.3"},
  61 #endif
  62 #ifndef OPENSSL_NO_PSK
  63     {"psk", OPT_PSK, '-', "Include ciphersuites requiring PSK"},
  64 #endif
  65 #ifndef OPENSSL_NO_SRP
  66     {"srp", OPT_SRP, '-', "Include ciphersuites requiring SRP"},
  67 #endif
  68     {"ciphersuites", OPT_CIPHERSUITES, 's',
  69      "Configure the TLSv1.3 ciphersuites to use"},
  70
  71     OPT_PARAMETERS(),
  72     {"cipher", 0, 0, "Cipher string to decode (optional)"},
  73     {NULL}
  74 };
  75
  76 #ifndef OPENSSL_NO_PSK
  77 static unsigned int dummy_psk(SSL *ssl, const char *hint, char *identity,
  78                               unsigned int max_identity_len,
  79                               unsigned char *psk,
  80                               unsigned int max_psk_len)
  81 {
  82     return 0;
  83 }
  84 #endif
  85 #ifndef OPENSSL_NO_SRP
  86 static char *dummy_srp(SSL *ssl, void *arg)
  87 {
  88     return "";
  89 }
  90 #endif
  91
  92 int ciphers_main(int argc, char **argv)
  93 {
  94     SSL_CTX *ctx = NULL;
  95     SSL *ssl = NULL;
  96     STACK_OF(SSL_CIPHER) *sk = NULL;
  97     const SSL_METHOD *meth = TLS_server_method();
  98     int ret = 1, i, verbose = 0, Verbose = 0, use_supported = 0;
  99     int stdname = 0;
 100 #ifndef OPENSSL_NO_PSK
 101     int psk = 0;
 102 #endif
 103 #ifndef OPENSSL_NO_SRP
 104     int srp = 0;
 105 #endif
 106     const char *p;
 107     char *ciphers = NULL, *prog, *convert = NULL, *ciphersuites = NULL;
 108     char buf[512];
 109     OPTION_CHOICE o;
 110     int min_version = 0, max_version = 0;
 111
 112     prog = opt_init(argc, argv, ciphers_options);
 113     while ((o = opt_next()) != OPT_EOF) {
 114         switch (o) {
 115         case OPT_EOF:
 116         case OPT_ERR:
 117  opthelp:
 118             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 119             goto end;
 120         case OPT_HELP:
 121             opt_help(ciphers_options);
 122             ret = 0;
 123             goto end;
 124         case OPT_V:
 125             verbose = 1;
 126             break;
 127         case OPT_UPPER_V:
 128             verbose = Verbose = 1;
 129             break;
 130         case OPT_S:
 131             use_supported = 1;
 132             break;
 133         case OPT_STDNAME:
 134             stdname = verbose = 1;
 135             break;
 136         case OPT_CONVERT:
 137             convert = opt_arg();
 138             break;
 139         case OPT_SSL3:
 140             min_version = SSL3_VERSION;
 141             max_version = SSL3_VERSION;
 142             break;
 143         case OPT_TLS1:
 144             min_version = TLS1_VERSION;
 145             max_version = TLS1_VERSION;
 146             break;
 147         case OPT_TLS1_1:
 148             min_version = TLS1_1_VERSION;
 149             max_version = TLS1_1_VERSION;
 150             break;
 151         case OPT_TLS1_2:
 152             min_version = TLS1_2_VERSION;
 153             max_version = TLS1_2_VERSION;
 154             break;
 155         case OPT_TLS1_3:
 156             min_version = TLS1_3_VERSION;
 157             max_version = TLS1_3_VERSION;
 158             break;
 159         case OPT_PSK:
 160 #ifndef OPENSSL_NO_PSK
 161             psk = 1;
 162 #endif
 163             break;
 164         case OPT_SRP:
 165 #ifndef OPENSSL_NO_SRP
 166             srp = 1;
 167 #endif
 168             break;
 169         case OPT_CIPHERSUITES:
 170             ciphersuites = opt_arg();
 171             break;
 172         }
 173     }
 174     argv = opt_rest();
 175     argc = opt_num_rest();
 176
 177     if (argc == 1)
 178         ciphers = *argv;
 179     else if (argc != 0)
 180         goto opthelp;
 181
 182     if (convert != NULL) {
 183         BIO_printf(bio_out, "OpenSSL cipher name: %s\n",
 184                    OPENSSL_cipher_name(convert));
 185         goto end;
 186     }
 187
 188     ctx = SSL_CTX_new(meth);
 189     if (ctx == NULL)
 190         goto err;
 191     if (SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
 192         goto err;
 193     if (SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
 194         goto err;
 195
 196 #ifndef OPENSSL_NO_PSK
 197     if (psk)
 198         SSL_CTX_set_psk_client_callback(ctx, dummy_psk);
 199 #endif
 200 #ifndef OPENSSL_NO_SRP
 201     if (srp)
 202         SSL_CTX_set_srp_client_pwd_callback(ctx, dummy_srp);
 203 #endif
 204
 205     if (ciphersuites != NULL && !SSL_CTX_set_ciphersuites(ctx, ciphersuites)) {
 206         BIO_printf(bio_err, "Error setting TLSv1.3 ciphersuites\n");
 207         goto err;
 208     }
 209
 210     if (ciphers != NULL) {
 211         if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
 212             BIO_printf(bio_err, "Error in cipher list\n");
 213             goto err;
 214         }
 215     }
 216     ssl = SSL_new(ctx);
 217     if (ssl == NULL)
 218         goto err;
 219
 220     if (use_supported)
 221         sk = SSL_get1_supported_ciphers(ssl);
 222     else
 223         sk = SSL_get_ciphers(ssl);
 224
 225     if (!verbose) {
 226         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 227             const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
 228             p = SSL_CIPHER_get_name(c);
 229             if (p == NULL)
 230                 break;
 231             if (i != 0)
 232                 BIO_printf(bio_out, ":");
 233             BIO_printf(bio_out, "%s", p);
 234         }
 235         BIO_printf(bio_out, "\n");
 236     } else {
 237
 238         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 239             const SSL_CIPHER *c;
 240
 241             c = sk_SSL_CIPHER_value(sk, i);
 242
 243             if (Verbose) {
 244                 unsigned long id = SSL_CIPHER_get_id(c);
 245                 int id0 = (int)(id >> 24);
 246                 int id1 = (int)((id >> 16) & 0xffL);
 247                 int id2 = (int)((id >> 8) & 0xffL);
 248                 int id3 = (int)(id & 0xffL);
 249
 250                 if ((id & 0xff000000L) == 0x03000000L)
 251                     BIO_printf(bio_out, "          0x%02X,0x%02X - ", id2, id3); /* SSL3
 252                                                                                   * cipher */
 253                 else
 254                     BIO_printf(bio_out, "0x%02X,0x%02X,0x%02X,0x%02X - ", id0, id1, id2, id3); /* whatever */
 255             }
 256             if (stdname) {
 257                 const char *nm = SSL_CIPHER_standard_name(c);
 258                 if (nm == NULL)
 259                     nm = "UNKNOWN";
 260                 BIO_printf(bio_out, "%-45s - ", nm);
 261             }
 262             BIO_puts(bio_out, SSL_CIPHER_description(c, buf, sizeof(buf)));
 263         }
 264     }
 265
 266     ret = 0;
 267     goto end;
 268  err:
 269     ERR_print_errors(bio_err);
 270  end:
 271     if (use_supported)
 272         sk_SSL_CIPHER_free(sk);
 273     SSL_CTX_free(ctx);
 274     SSL_free(ssl);
 275     return ret;
 276 }