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, OPT_PROV_ENUM
  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     OPT_PROV_OPTIONS,
  71
  72     OPT_PARAMETERS(),
  73     {"cipher", 0, 0, "Cipher string to decode (optional)"},
  74     {NULL}
  75 };
  76
  77 #ifndef OPENSSL_NO_PSK
  78 static unsigned int dummy_psk(SSL *ssl, const char *hint, char *identity,
  79                               unsigned int max_identity_len,
  80                               unsigned char *psk,
  81                               unsigned int max_psk_len)
  82 {
  83     return 0;
  84 }
  85 #endif
  86 #ifndef OPENSSL_NO_SRP
  87 static char *dummy_srp(SSL *ssl, void *arg)
  88 {
  89     return "";
  90 }
  91 #endif
  92
  93 int ciphers_main(int argc, char **argv)
  94 {
  95     SSL_CTX *ctx = NULL;
  96     SSL *ssl = NULL;
  97     STACK_OF(SSL_CIPHER) *sk = NULL;
  98     const SSL_METHOD *meth = TLS_server_method();
  99     int ret = 1, i, verbose = 0, Verbose = 0, use_supported = 0;
 100     int stdname = 0;
 101 #ifndef OPENSSL_NO_PSK
 102     int psk = 0;
 103 #endif
 104 #ifndef OPENSSL_NO_SRP
 105     int srp = 0;
 106 #endif
 107     const char *p;
 108     char *ciphers = NULL, *prog, *convert = NULL, *ciphersuites = NULL;
 109     char buf[512];
 110     OPTION_CHOICE o;
 111     int min_version = 0, max_version = 0;
 112
 113     prog = opt_init(argc, argv, ciphers_options);
 114     while ((o = opt_next()) != OPT_EOF) {
 115         switch (o) {
 116         case OPT_EOF:
 117         case OPT_ERR:
 118  opthelp:
 119             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 120             goto end;
 121         case OPT_HELP:
 122             opt_help(ciphers_options);
 123             ret = 0;
 124             goto end;
 125         case OPT_V:
 126             verbose = 1;
 127             break;
 128         case OPT_UPPER_V:
 129             verbose = Verbose = 1;
 130             break;
 131         case OPT_S:
 132             use_supported = 1;
 133             break;
 134         case OPT_STDNAME:
 135             stdname = verbose = 1;
 136             break;
 137         case OPT_CONVERT:
 138             convert = opt_arg();
 139             break;
 140         case OPT_SSL3:
 141             min_version = SSL3_VERSION;
 142             max_version = SSL3_VERSION;
 143             break;
 144         case OPT_TLS1:
 145             min_version = TLS1_VERSION;
 146             max_version = TLS1_VERSION;
 147             break;
 148         case OPT_TLS1_1:
 149             min_version = TLS1_1_VERSION;
 150             max_version = TLS1_1_VERSION;
 151             break;
 152         case OPT_TLS1_2:
 153             min_version = TLS1_2_VERSION;
 154             max_version = TLS1_2_VERSION;
 155             break;
 156         case OPT_TLS1_3:
 157             min_version = TLS1_3_VERSION;
 158             max_version = TLS1_3_VERSION;
 159             break;
 160         case OPT_PSK:
 161 #ifndef OPENSSL_NO_PSK
 162             psk = 1;
 163 #endif
 164             break;
 165         case OPT_SRP:
 166 #ifndef OPENSSL_NO_SRP
 167             srp = 1;
 168 #endif
 169             break;
 170         case OPT_CIPHERSUITES:
 171             ciphersuites = opt_arg();
 172             break;
 173         case OPT_PROV_CASES:
 174             if (!opt_provider(o))
 175                 goto end;
 176             break;
 177         }
 178     }
 179     argv = opt_rest();
 180     argc = opt_num_rest();
 181
 182     if (argc == 1)
 183         ciphers = *argv;
 184     else if (argc != 0)
 185         goto opthelp;
 186
 187     if (convert != NULL) {
 188         BIO_printf(bio_out, "OpenSSL cipher name: %s\n",
 189                    OPENSSL_cipher_name(convert));
 190         goto end;
 191     }
 192
 193     ctx = SSL_CTX_new(meth);
 194     if (ctx == NULL)
 195         goto err;
 196     if (SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
 197         goto err;
 198     if (SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
 199         goto err;
 200
 201 #ifndef OPENSSL_NO_PSK
 202     if (psk)
 203         SSL_CTX_set_psk_client_callback(ctx, dummy_psk);
 204 #endif
 205 #ifndef OPENSSL_NO_SRP
 206     if (srp)
 207         SSL_CTX_set_srp_client_pwd_callback(ctx, dummy_srp);
 208 #endif
 209
 210     if (ciphersuites != NULL && !SSL_CTX_set_ciphersuites(ctx, ciphersuites)) {
 211         BIO_printf(bio_err, "Error setting TLSv1.3 ciphersuites\n");
 212         goto err;
 213     }
 214
 215     if (ciphers != NULL) {
 216         if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
 217             BIO_printf(bio_err, "Error in cipher list\n");
 218             goto err;
 219         }
 220     }
 221     ssl = SSL_new(ctx);
 222     if (ssl == NULL)
 223         goto err;
 224
 225     if (use_supported)
 226         sk = SSL_get1_supported_ciphers(ssl);
 227     else
 228         sk = SSL_get_ciphers(ssl);
 229
 230     if (!verbose) {
 231         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 232             const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
 233             p = SSL_CIPHER_get_name(c);
 234             if (p == NULL)
 235                 break;
 236             if (i != 0)
 237                 BIO_printf(bio_out, ":");
 238             BIO_printf(bio_out, "%s", p);
 239         }
 240         BIO_printf(bio_out, "\n");
 241     } else {
 242
 243         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 244             const SSL_CIPHER *c;
 245
 246             c = sk_SSL_CIPHER_value(sk, i);
 247
 248             if (Verbose) {
 249                 unsigned long id = SSL_CIPHER_get_id(c);
 250                 int id0 = (int)(id >> 24);
 251                 int id1 = (int)((id >> 16) & 0xffL);
 252                 int id2 = (int)((id >> 8) & 0xffL);
 253                 int id3 = (int)(id & 0xffL);
 254
 255                 if ((id & 0xff000000L) == 0x03000000L)
 256                     BIO_printf(bio_out, "          0x%02X,0x%02X - ", id2, id3); /* SSL3
 257                                                                                   * cipher */
 258                 else
 259                     BIO_printf(bio_out, "0x%02X,0x%02X,0x%02X,0x%02X - ", id0, id1, id2, id3); /* whatever */
 260             }
 261             if (stdname) {
 262                 const char *nm = SSL_CIPHER_standard_name(c);
 263                 if (nm == NULL)
 264                     nm = "UNKNOWN";
 265                 BIO_printf(bio_out, "%-45s - ", nm);
 266             }
 267             BIO_puts(bio_out, SSL_CIPHER_description(c, buf, sizeof(buf)));
 268         }
 269     }
 270
 271     ret = 0;
 272     goto end;
 273  err:
 274     ERR_print_errors(bio_err);
 275  end:
 276     if (use_supported)
 277         sk_SSL_CIPHER_free(sk);
 278     SSL_CTX_free(ctx);
 279     SSL_free(ssl);
 280     return ret;
 281 }