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