| 1 | /*
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| 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <stdlib.h>
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| 12 | #include <string.h>
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| 13 | #include "apps.h"
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| 14 | #include "progs.h"
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| 15 | #include <openssl/err.h>
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| 16 | #include <openssl/ssl.h>
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| 17 |
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| 18 | typedef enum OPTION_choice {
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| 19 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
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| 20 | OPT_STDNAME,
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| 21 | OPT_CONVERT,
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| 22 | OPT_SSL3,
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| 23 | OPT_TLS1,
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| 24 | OPT_TLS1_1,
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| 25 | OPT_TLS1_2,
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| 26 | OPT_TLS1_3,
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| 27 | OPT_PSK,
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| 28 | OPT_SRP,
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| 29 | OPT_CIPHERSUITES,
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| 30 | OPT_V, OPT_UPPER_V, OPT_S
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| 31 | } OPTION_CHOICE;
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| 32 |
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| 33 | const OPTIONS ciphers_options[] = {
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| 34 | {"help", OPT_HELP, '-', "Display this summary"},
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| 35 | {"v", OPT_V, '-', "Verbose listing of the SSL/TLS ciphers"},
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| 36 | {"V", OPT_UPPER_V, '-', "Even more verbose"},
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| 37 | {"s", OPT_S, '-', "Only supported ciphers"},
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| 38 | #ifndef OPENSSL_NO_SSL3
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| 39 | {"ssl3", OPT_SSL3, '-', "SSL3 mode"},
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| 40 | #endif
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| 41 | #ifndef OPENSSL_NO_TLS1
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| 42 | {"tls1", OPT_TLS1, '-', "TLS1 mode"},
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| 43 | #endif
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| 44 | #ifndef OPENSSL_NO_TLS1_1
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| 45 | {"tls1_1", OPT_TLS1_1, '-', "TLS1.1 mode"},
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| 46 | #endif
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| 47 | #ifndef OPENSSL_NO_TLS1_2
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| 48 | {"tls1_2", OPT_TLS1_2, '-', "TLS1.2 mode"},
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| 49 | #endif
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| 50 | #ifndef OPENSSL_NO_TLS1_3
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| 51 | {"tls1_3", OPT_TLS1_3, '-', "TLS1.3 mode"},
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| 52 | #endif
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| 53 | {"stdname", OPT_STDNAME, '-', "Show standard cipher names"},
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| 54 | #ifndef OPENSSL_NO_PSK
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| 55 | {"psk", OPT_PSK, '-', "include ciphersuites requiring PSK"},
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| 56 | #endif
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| 57 | #ifndef OPENSSL_NO_SRP
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| 58 | {"srp", OPT_SRP, '-', "include ciphersuites requiring SRP"},
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| 59 | #endif
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| 60 | {"convert", OPT_CONVERT, 's', "Convert standard name into OpenSSL name"},
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| 61 | {"ciphersuites", OPT_CIPHERSUITES, 's',
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| 62 | "Configure the TLSv1.3 ciphersuites to use"},
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| 63 | {NULL}
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| 64 | };
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| 65 |
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| 66 | #ifndef OPENSSL_NO_PSK
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| 67 | static unsigned int dummy_psk(SSL *ssl, const char *hint, char *identity,
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| 68 | unsigned int max_identity_len,
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| 69 | unsigned char *psk,
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| 70 | unsigned int max_psk_len)
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| 71 | {
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| 72 | return 0;
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| 73 | }
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| 74 | #endif
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| 75 | #ifndef OPENSSL_NO_SRP
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| 76 | static char *dummy_srp(SSL *ssl, void *arg)
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| 77 | {
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| 78 | return "";
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| 79 | }
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| 80 | #endif
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| 81 |
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| 82 | int ciphers_main(int argc, char **argv)
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| 83 | {
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| 84 | SSL_CTX *ctx = NULL;
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| 85 | SSL *ssl = NULL;
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| 86 | STACK_OF(SSL_CIPHER) *sk = NULL;
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| 87 | const SSL_METHOD *meth = TLS_server_method();
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| 88 | int ret = 1, i, verbose = 0, Verbose = 0, use_supported = 0;
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| 89 | int stdname = 0;
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| 90 | #ifndef OPENSSL_NO_PSK
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| 91 | int psk = 0;
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| 92 | #endif
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| 93 | #ifndef OPENSSL_NO_SRP
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| 94 | int srp = 0;
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| 95 | #endif
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| 96 | const char *p;
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| 97 | char *ciphers = NULL, *prog, *convert = NULL, *ciphersuites = NULL;
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| 98 | char buf[512];
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| 99 | OPTION_CHOICE o;
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| 100 | int min_version = 0, max_version = 0;
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| 101 |
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| 102 | prog = opt_init(argc, argv, ciphers_options);
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| 103 | while ((o = opt_next()) != OPT_EOF) {
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| 104 | switch (o) {
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| 105 | case OPT_EOF:
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| 106 | case OPT_ERR:
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| 107 | opthelp:
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| 108 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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| 109 | goto end;
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| 110 | case OPT_HELP:
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| 111 | opt_help(ciphers_options);
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| 112 | ret = 0;
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| 113 | goto end;
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| 114 | case OPT_V:
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| 115 | verbose = 1;
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| 116 | break;
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| 117 | case OPT_UPPER_V:
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| 118 | verbose = Verbose = 1;
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| 119 | break;
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| 120 | case OPT_S:
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| 121 | use_supported = 1;
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| 122 | break;
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| 123 | case OPT_STDNAME:
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| 124 | stdname = verbose = 1;
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| 125 | break;
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| 126 | case OPT_CONVERT:
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| 127 | convert = opt_arg();
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| 128 | break;
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| 129 | case OPT_SSL3:
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| 130 | min_version = SSL3_VERSION;
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| 131 | max_version = SSL3_VERSION;
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| 132 | break;
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| 133 | case OPT_TLS1:
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| 134 | min_version = TLS1_VERSION;
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| 135 | max_version = TLS1_VERSION;
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| 136 | break;
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| 137 | case OPT_TLS1_1:
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| 138 | min_version = TLS1_1_VERSION;
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| 139 | max_version = TLS1_1_VERSION;
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| 140 | break;
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| 141 | case OPT_TLS1_2:
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| 142 | min_version = TLS1_2_VERSION;
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| 143 | max_version = TLS1_2_VERSION;
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| 144 | break;
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| 145 | case OPT_TLS1_3:
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| 146 | min_version = TLS1_3_VERSION;
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| 147 | max_version = TLS1_3_VERSION;
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| 148 | break;
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| 149 | case OPT_PSK:
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| 150 | #ifndef OPENSSL_NO_PSK
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| 151 | psk = 1;
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| 152 | #endif
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| 153 | break;
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| 154 | case OPT_SRP:
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| 155 | #ifndef OPENSSL_NO_SRP
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| 156 | srp = 1;
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| 157 | #endif
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| 158 | break;
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| 159 | case OPT_CIPHERSUITES:
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| 160 | ciphersuites = opt_arg();
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| 161 | break;
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| 162 | }
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| 163 | }
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| 164 | argv = opt_rest();
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| 165 | argc = opt_num_rest();
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| 166 |
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| 167 | if (argc == 1)
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| 168 | ciphers = *argv;
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| 169 | else if (argc != 0)
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| 170 | goto opthelp;
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| 171 |
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| 172 | if (convert != NULL) {
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| 173 | BIO_printf(bio_out, "OpenSSL cipher name: %s\n",
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| 174 | OPENSSL_cipher_name(convert));
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| 175 | goto end;
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| 176 | }
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| 177 |
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| 178 | ctx = SSL_CTX_new(meth);
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| 179 | if (ctx == NULL)
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| 180 | goto err;
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| 181 | if (SSL_CTX_set_min_proto_version(ctx, min_version) == 0)
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| 182 | goto err;
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| 183 | if (SSL_CTX_set_max_proto_version(ctx, max_version) == 0)
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| 184 | goto err;
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| 185 |
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| 186 | #ifndef OPENSSL_NO_PSK
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| 187 | if (psk)
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| 188 | SSL_CTX_set_psk_client_callback(ctx, dummy_psk);
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| 189 | #endif
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| 190 | #ifndef OPENSSL_NO_SRP
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| 191 | if (srp)
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| 192 | SSL_CTX_set_srp_client_pwd_callback(ctx, dummy_srp);
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| 193 | #endif
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| 194 |
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| 195 | if (ciphersuites != NULL && !SSL_CTX_set_ciphersuites(ctx, ciphersuites)) {
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| 196 | BIO_printf(bio_err, "Error setting TLSv1.3 ciphersuites\n");
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| 197 | goto err;
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| 198 | }
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| 199 |
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| 200 | if (ciphers != NULL) {
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| 201 | if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
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| 202 | BIO_printf(bio_err, "Error in cipher list\n");
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| 203 | goto err;
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| 204 | }
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| 205 | }
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| 206 | ssl = SSL_new(ctx);
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| 207 | if (ssl == NULL)
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| 208 | goto err;
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| 209 |
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| 210 | if (use_supported)
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| 211 | sk = SSL_get1_supported_ciphers(ssl);
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| 212 | else
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| 213 | sk = SSL_get_ciphers(ssl);
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| 214 |
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| 215 | if (!verbose) {
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| 216 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
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| 217 | const SSL_CIPHER *c = sk_SSL_CIPHER_value(sk, i);
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| 218 | p = SSL_CIPHER_get_name(c);
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| 219 | if (p == NULL)
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| 220 | break;
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| 221 | if (i != 0)
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| 222 | BIO_printf(bio_out, ":");
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| 223 | BIO_printf(bio_out, "%s", p);
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| 224 | }
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| 225 | BIO_printf(bio_out, "\n");
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| 226 | } else {
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| 227 |
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| 228 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
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| 229 | const SSL_CIPHER *c;
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| 230 |
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| 231 | c = sk_SSL_CIPHER_value(sk, i);
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| 232 |
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| 233 | if (Verbose) {
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| 234 | unsigned long id = SSL_CIPHER_get_id(c);
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| 235 | int id0 = (int)(id >> 24);
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| 236 | int id1 = (int)((id >> 16) & 0xffL);
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| 237 | int id2 = (int)((id >> 8) & 0xffL);
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| 238 | int id3 = (int)(id & 0xffL);
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| 239 |
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| 240 | if ((id & 0xff000000L) == 0x03000000L)
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| 241 | BIO_printf(bio_out, " 0x%02X,0x%02X - ", id2, id3); /* SSL3
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| 242 | * cipher */
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| 243 | else
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| 244 | BIO_printf(bio_out, "0x%02X,0x%02X,0x%02X,0x%02X - ", id0, id1, id2, id3); /* whatever */
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| 245 | }
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| 246 | if (stdname) {
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| 247 | const char *nm = SSL_CIPHER_standard_name(c);
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| 248 | if (nm == NULL)
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| 249 | nm = "UNKNOWN";
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| 250 | BIO_printf(bio_out, "%s - ", nm);
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| 251 | }
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| 252 | BIO_puts(bio_out, SSL_CIPHER_description(c, buf, sizeof(buf)));
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| 253 | }
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| 254 | }
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| 255 |
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| 256 | ret = 0;
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| 257 | goto end;
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| 258 | err:
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| 259 | ERR_print_errors(bio_err);
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| 260 | end:
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| 261 | if (use_supported)
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| 262 | sk_SSL_CIPHER_free(sk);
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| 263 | SSL_CTX_free(ctx);
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| 264 | SSL_free(ssl);
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| 265 | return ret;
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| 266 | }
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