apps/ciphers.c

   1 /*
   2  * Copyright 1995-2017 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_CONVERT,
  21     OPT_SSL3,
  22     OPT_TLS1,
  23     OPT_TLS1_1,
  24     OPT_TLS1_2,
  25     OPT_TLS1_3,
  26     OPT_PSK,
  27     OPT_SRP,
  28     OPT_V, OPT_UPPER_V, OPT_S
  29 } OPTION_CHOICE;
  30
  31 const OPTIONS ciphers_options[] = {
  32     {"help", OPT_HELP, '-', "Display this summary"},
  33     {"v", OPT_V, '-', "Verbose listing of the SSL/TLS ciphers"},
  34     {"V", OPT_UPPER_V, '-', "Even more verbose"},
  35     {"s", OPT_S, '-', "Only supported ciphers"},
  36 #ifndef OPENSSL_NO_SSL3
  37     {"ssl3", OPT_SSL3, '-', "SSL3 mode"},
  38 #endif
  39 #ifndef OPENSSL_NO_TLS1
  40     {"tls1", OPT_TLS1, '-', "TLS1 mode"},
  41 #endif
  42 #ifndef OPENSSL_NO_TLS1_1
  43     {"tls1_1", OPT_TLS1_1, '-', "TLS1.1 mode"},
  44 #endif
  45 #ifndef OPENSSL_NO_TLS1_2
  46     {"tls1_2", OPT_TLS1_2, '-', "TLS1.2 mode"},
  47 #endif
  48 #ifndef OPENSSL_NO_TLS1_3
  49     {"tls1_3", OPT_TLS1_3, '-', "TLS1.3 mode"},
  50 #endif
  51     {"stdname", OPT_STDNAME, '-', "Show standard cipher names"},
  52 #ifndef OPENSSL_NO_PSK
  53     {"psk", OPT_PSK, '-', "include ciphersuites requiring PSK"},
  54 #endif
  55 #ifndef OPENSSL_NO_SRP
  56     {"srp", OPT_SRP, '-', "include ciphersuites requiring SRP"},
  57 #endif
  58     {"convert", OPT_CONVERT, 's', "Convert standard name into OpenSSL name"},
  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     int stdname = 0;
  86 #ifndef OPENSSL_NO_PSK
  87     int psk = 0;
  88 #endif
  89 #ifndef OPENSSL_NO_SRP
  90     int srp = 0;
  91 #endif
  92     const char *p;
  93     char *ciphers = NULL, *prog, *convert = NULL;
  94     char buf[512];
  95     OPTION_CHOICE o;
  96     int min_version = 0, max_version = 0;
  97
  98     prog = opt_init(argc, argv, ciphers_options);
  99     while ((o = opt_next()) != OPT_EOF) {
 100         switch (o) {
 101         case OPT_EOF:
 102         case OPT_ERR:
 103  opthelp:
 104             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 105             goto end;
 106         case OPT_HELP:
 107             opt_help(ciphers_options);
 108             ret = 0;
 109             goto end;
 110         case OPT_V:
 111             verbose = 1;
 112             break;
 113         case OPT_UPPER_V:
 114             verbose = Verbose = 1;
 115             break;
 116         case OPT_S:
 117             use_supported = 1;
 118             break;
 119         case OPT_STDNAME:
 120             stdname = verbose = 1;
 121             break;
 122         case OPT_CONVERT:
 123             convert = opt_arg();
 124             break;
 125         case OPT_SSL3:
 126             min_version = SSL3_VERSION;
 127             max_version = SSL3_VERSION;
 128             break;
 129         case OPT_TLS1:
 130             min_version = TLS1_VERSION;
 131             max_version = TLS1_VERSION;
 132             break;
 133         case OPT_TLS1_1:
 134             min_version = TLS1_1_VERSION;
 135             max_version = TLS1_1_VERSION;
 136             break;
 137         case OPT_TLS1_2:
 138             min_version = TLS1_2_VERSION;
 139             max_version = TLS1_2_VERSION;
 140             break;
 141         case OPT_TLS1_3:
 142             min_version = TLS1_3_VERSION;
 143             max_version = TLS1_3_VERSION;
 144             break;
 145         case OPT_PSK:
 146 #ifndef OPENSSL_NO_PSK
 147             psk = 1;
 148 #endif
 149             break;
 150         case OPT_SRP:
 151 #ifndef OPENSSL_NO_SRP
 152             srp = 1;
 153 #endif
 154             break;
 155         }
 156     }
 157     argv = opt_rest();
 158     argc = opt_num_rest();
 159
 160     if (argc == 1)
 161         ciphers = *argv;
 162     else if (argc != 0)
 163         goto opthelp;
 164
 165     if (convert != NULL) {
 166         BIO_printf(bio_out, "OpenSSL cipher name: %s\n",
 167                    OPENSSL_cipher_name(convert));
 168         goto end;
 169     }
 170
 171     ctx = SSL_CTX_new(meth);
 172     if (ctx == NULL)
 173         goto err;
 174     if (SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
 175         goto err;
 176     if (SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
 177         goto err;
 178
 179 #ifndef OPENSSL_NO_PSK
 180     if (psk)
 181         SSL_CTX_set_psk_client_callback(ctx, dummy_psk);
 182 #endif
 183 #ifndef OPENSSL_NO_SRP
 184     if (srp)
 185         SSL_CTX_set_srp_client_pwd_callback(ctx, dummy_srp);
 186 #endif
 187     if (ciphers != NULL) {
 188         if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
 189             BIO_printf(bio_err, "Error in cipher list\n");
 190             goto err;
 191         }
 192     }
 193     ssl = SSL_new(ctx);
 194     if (ssl == NULL)
 195         goto err;
 196
 197     if (use_supported)
 198         sk = SSL_get1_supported_ciphers(ssl);
 199     else
 200         sk = SSL_get_ciphers(ssl);
 201
 202     if (!verbose) {
 203         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 204             const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
 205             p = SSL_CIPHER_get_name(c);
 206             if (p == NULL)
 207                 break;
 208             if (i != 0)
 209                 BIO_printf(bio_out, ":");
 210             BIO_printf(bio_out, "%s", p);
 211         }
 212         BIO_printf(bio_out, "\n");
 213     } else {
 214
 215         for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
 216             const SSL_CIPHER *c;
 217
 218             c = sk_SSL_CIPHER_value(sk, i);
 219
 220             if (Verbose) {
 221                 unsigned long id = SSL_CIPHER_get_id(c);
 222                 int id0 = (int)(id >> 24);
 223                 int id1 = (int)((id >> 16) & 0xffL);
 224                 int id2 = (int)((id >> 8) & 0xffL);
 225                 int id3 = (int)(id & 0xffL);
 226
 227                 if ((id & 0xff000000L) == 0x03000000L)
 228                     BIO_printf(bio_out, "          0x%02X,0x%02X - ", id2, id3); /* SSL3
 229                                                                                   * cipher */
 230                 else
 231                     BIO_printf(bio_out, "0x%02X,0x%02X,0x%02X,0x%02X - ", id0, id1, id2, id3); /* whatever */
 232             }
 233             if (stdname) {
 234                 const char *nm = SSL_CIPHER_standard_name(c);
 235                 if (nm == NULL)
 236                     nm = "UNKNOWN";
 237                 BIO_printf(bio_out, "%s - ", nm);
 238             }
 239             BIO_puts(bio_out, SSL_CIPHER_description(c, buf, sizeof buf));
 240         }
 241     }
 242
 243     ret = 0;
 244     goto end;
 245  err:
 246     ERR_print_errors(bio_err);
 247  end:
 248     if (use_supported)
 249         sk_SSL_CIPHER_free(sk);
 250     SSL_CTX_free(ctx);
 251     SSL_free(ssl);
 252     return ret;
 253 }