[164] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | /* This file is for implementing all "generic" SSL functions that all libcurl
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| 24 | internals should use. It is then responsible for calling the proper
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| 25 | "backend" function.
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| 26 |
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| 27 | SSL-functions in libcurl should call functions in this source file, and not
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| 28 | to any specific SSL-layer.
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| 29 |
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| 30 | Curl_ssl_ - prefix for generic ones
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| 31 | Curl_ossl_ - prefix for OpenSSL ones
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| 32 | Curl_gtls_ - prefix for GnuTLS ones
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| 33 | Curl_nss_ - prefix for NSS ones
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| 34 | Curl_gskit_ - prefix for GSKit ones
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| 35 | Curl_polarssl_ - prefix for PolarSSL ones
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| 36 | Curl_cyassl_ - prefix for CyaSSL ones
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| 37 | Curl_schannel_ - prefix for Schannel SSPI ones
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| 38 | Curl_darwinssl_ - prefix for SecureTransport (Darwin) ones
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| 39 |
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| 40 | Note that this source code uses curlssl_* functions, and they are all
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| 41 | defines/macros #defined by the lib-specific header files.
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| 42 |
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| 43 | "SSL/TLS Strong Encryption: An Introduction"
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| 44 | https://httpd.apache.org/docs/2.0/ssl/ssl_intro.html
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| 45 | */
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| 46 |
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| 47 | #include "curl_setup.h"
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| 48 |
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| 49 | #ifdef HAVE_SYS_TYPES_H
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| 50 | #include <sys/types.h>
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| 51 | #endif
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| 52 | #ifdef HAVE_SYS_STAT_H
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| 53 | #include <sys/stat.h>
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| 54 | #endif
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| 55 | #ifdef HAVE_FCNTL_H
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| 56 | #include <fcntl.h>
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| 57 | #endif
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| 58 |
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| 59 | #include "urldata.h"
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| 60 |
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| 61 | #include "vtls.h" /* generic SSL protos etc */
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| 62 | #include "slist.h"
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| 63 | #include "sendf.h"
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| 64 | #include "rawstr.h"
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| 65 | #include "url.h"
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| 66 | #include "progress.h"
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| 67 | #include "share.h"
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| 68 | #include "timeval.h"
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| 69 | #include "curl_md5.h"
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| 70 | #include "warnless.h"
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| 71 | #include "curl_base64.h"
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| 72 | #include "curl_printf.h"
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| 73 |
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| 74 | /* The last #include files should be: */
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| 75 | #include "curl_memory.h"
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| 76 | #include "memdebug.h"
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| 77 |
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| 78 | /* convenience macro to check if this handle is using a shared SSL session */
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| 79 | #define SSLSESSION_SHARED(data) (data->share && \
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| 80 | (data->share->specifier & \
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| 81 | (1<<CURL_LOCK_DATA_SSL_SESSION)))
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| 82 |
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| 83 | static bool safe_strequal(char* str1, char* str2)
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| 84 | {
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| 85 | if(str1 && str2)
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| 86 | /* both pointers point to something then compare them */
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| 87 | return (0 != Curl_raw_equal(str1, str2)) ? TRUE : FALSE;
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| 88 | else
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| 89 | /* if both pointers are NULL then treat them as equal */
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| 90 | return (!str1 && !str2) ? TRUE : FALSE;
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| 91 | }
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| 92 |
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| 93 | bool
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| 94 | Curl_ssl_config_matches(struct ssl_config_data* data,
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| 95 | struct ssl_config_data* needle)
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| 96 | {
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| 97 | if((data->version == needle->version) &&
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| 98 | (data->verifypeer == needle->verifypeer) &&
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| 99 | (data->verifyhost == needle->verifyhost) &&
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| 100 | safe_strequal(data->CApath, needle->CApath) &&
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| 101 | safe_strequal(data->CAfile, needle->CAfile) &&
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| 102 | safe_strequal(data->random_file, needle->random_file) &&
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| 103 | safe_strequal(data->egdsocket, needle->egdsocket) &&
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| 104 | safe_strequal(data->cipher_list, needle->cipher_list))
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| 105 | return TRUE;
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| 106 |
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| 107 | return FALSE;
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| 108 | }
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| 109 |
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| 110 | bool
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| 111 | Curl_clone_ssl_config(struct ssl_config_data *source,
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| 112 | struct ssl_config_data *dest)
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| 113 | {
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| 114 | dest->sessionid = source->sessionid;
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| 115 | dest->verifyhost = source->verifyhost;
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| 116 | dest->verifypeer = source->verifypeer;
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| 117 | dest->version = source->version;
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| 118 |
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| 119 | if(source->CAfile) {
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| 120 | dest->CAfile = strdup(source->CAfile);
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| 121 | if(!dest->CAfile)
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| 122 | return FALSE;
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| 123 | }
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| 124 | else
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| 125 | dest->CAfile = NULL;
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| 126 |
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| 127 | if(source->CApath) {
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| 128 | dest->CApath = strdup(source->CApath);
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| 129 | if(!dest->CApath)
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| 130 | return FALSE;
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| 131 | }
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| 132 | else
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| 133 | dest->CApath = NULL;
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| 134 |
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| 135 | if(source->cipher_list) {
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| 136 | dest->cipher_list = strdup(source->cipher_list);
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| 137 | if(!dest->cipher_list)
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| 138 | return FALSE;
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| 139 | }
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| 140 | else
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| 141 | dest->cipher_list = NULL;
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| 142 |
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| 143 | if(source->egdsocket) {
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| 144 | dest->egdsocket = strdup(source->egdsocket);
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| 145 | if(!dest->egdsocket)
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| 146 | return FALSE;
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| 147 | }
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| 148 | else
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| 149 | dest->egdsocket = NULL;
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| 150 |
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| 151 | if(source->random_file) {
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| 152 | dest->random_file = strdup(source->random_file);
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| 153 | if(!dest->random_file)
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| 154 | return FALSE;
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| 155 | }
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| 156 | else
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| 157 | dest->random_file = NULL;
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| 158 |
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| 159 | return TRUE;
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| 160 | }
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| 161 |
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| 162 | void Curl_free_ssl_config(struct ssl_config_data* sslc)
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| 163 | {
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| 164 | Curl_safefree(sslc->CAfile);
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| 165 | Curl_safefree(sslc->CApath);
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| 166 | Curl_safefree(sslc->cipher_list);
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| 167 | Curl_safefree(sslc->egdsocket);
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| 168 | Curl_safefree(sslc->random_file);
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| 169 | }
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| 170 |
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| 171 |
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| 172 | /*
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| 173 | * Curl_rand() returns a random unsigned integer, 32bit.
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| 174 | *
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| 175 | * This non-SSL function is put here only because this file is the only one
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| 176 | * with knowledge of what the underlying SSL libraries provide in terms of
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| 177 | * randomizers.
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| 178 | *
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| 179 | * NOTE: 'data' may be passed in as NULL when coming from external API without
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| 180 | * easy handle!
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| 181 | *
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| 182 | */
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| 183 |
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| 184 | unsigned int Curl_rand(struct SessionHandle *data)
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| 185 | {
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| 186 | unsigned int r = 0;
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| 187 | static unsigned int randseed;
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| 188 | static bool seeded = FALSE;
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| 189 |
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| 190 | #ifdef CURLDEBUG
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| 191 | char *force_entropy = getenv("CURL_ENTROPY");
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| 192 | if(force_entropy) {
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| 193 | if(!seeded) {
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| 194 | size_t elen = strlen(force_entropy);
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| 195 | size_t clen = sizeof(randseed);
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| 196 | size_t min = elen < clen ? elen : clen;
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| 197 | memcpy((char *)&randseed, force_entropy, min);
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| 198 | seeded = TRUE;
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| 199 | }
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| 200 | else
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| 201 | randseed++;
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| 202 | return randseed;
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| 203 | }
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| 204 | #endif
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| 205 |
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| 206 | /* data may be NULL! */
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| 207 | if(!Curl_ssl_random(data, (unsigned char *)&r, sizeof(r)))
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| 208 | return r;
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| 209 |
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| 210 | /* If Curl_ssl_random() returns non-zero it couldn't offer randomness and we
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| 211 | instead perform a "best effort" */
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| 212 |
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| 213 | #ifdef RANDOM_FILE
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| 214 | if(!seeded) {
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| 215 | /* if there's a random file to read a seed from, use it */
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| 216 | int fd = open(RANDOM_FILE, O_RDONLY);
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| 217 | if(fd > -1) {
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| 218 | /* read random data into the randseed variable */
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| 219 | ssize_t nread = read(fd, &randseed, sizeof(randseed));
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| 220 | if(nread == sizeof(randseed))
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| 221 | seeded = TRUE;
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| 222 | close(fd);
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| 223 | }
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| 224 | }
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| 225 | #endif
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| 226 |
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| 227 | if(!seeded) {
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| 228 | struct timeval now = curlx_tvnow();
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| 229 | infof(data, "WARNING: Using weak random seed\n");
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| 230 | randseed += (unsigned int)now.tv_usec + (unsigned int)now.tv_sec;
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| 231 | randseed = randseed * 1103515245 + 12345;
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| 232 | randseed = randseed * 1103515245 + 12345;
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| 233 | randseed = randseed * 1103515245 + 12345;
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| 234 | seeded = TRUE;
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| 235 | }
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| 236 |
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| 237 | /* Return an unsigned 32-bit pseudo-random number. */
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| 238 | r = randseed = randseed * 1103515245 + 12345;
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| 239 | return (r << 16) | ((r >> 16) & 0xFFFF);
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| 240 | }
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| 241 |
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| 242 | int Curl_ssl_backend(void)
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| 243 | {
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| 244 | return (int)CURL_SSL_BACKEND;
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| 245 | }
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| 246 |
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| 247 | #ifdef USE_SSL
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| 248 |
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| 249 | /* "global" init done? */
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| 250 | static bool init_ssl=FALSE;
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| 251 |
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| 252 | /**
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| 253 | * Global SSL init
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| 254 | *
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| 255 | * @retval 0 error initializing SSL
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| 256 | * @retval 1 SSL initialized successfully
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| 257 | */
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| 258 | int Curl_ssl_init(void)
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| 259 | {
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| 260 | /* make sure this is only done once */
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| 261 | if(init_ssl)
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| 262 | return 1;
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| 263 | init_ssl = TRUE; /* never again */
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| 264 |
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| 265 | return curlssl_init();
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| 266 | }
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| 267 |
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| 268 |
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| 269 | /* Global cleanup */
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| 270 | void Curl_ssl_cleanup(void)
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| 271 | {
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| 272 | if(init_ssl) {
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| 273 | /* only cleanup if we did a previous init */
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| 274 | curlssl_cleanup();
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| 275 | init_ssl = FALSE;
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| 276 | }
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| 277 | }
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| 278 |
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| 279 | static bool ssl_prefs_check(struct SessionHandle *data)
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| 280 | {
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| 281 | /* check for CURLOPT_SSLVERSION invalid parameter value */
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| 282 | if((data->set.ssl.version < 0)
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| 283 | || (data->set.ssl.version >= CURL_SSLVERSION_LAST)) {
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| 284 | failf(data, "Unrecognized parameter value passed via CURLOPT_SSLVERSION");
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| 285 | return FALSE;
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| 286 | }
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| 287 | return TRUE;
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| 288 | }
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| 289 |
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| 290 | CURLcode
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| 291 | Curl_ssl_connect(struct connectdata *conn, int sockindex)
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| 292 | {
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| 293 | CURLcode result;
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| 294 |
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| 295 | if(!ssl_prefs_check(conn->data))
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| 296 | return CURLE_SSL_CONNECT_ERROR;
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| 297 |
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| 298 | /* mark this is being ssl-enabled from here on. */
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| 299 | conn->ssl[sockindex].use = TRUE;
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| 300 | conn->ssl[sockindex].state = ssl_connection_negotiating;
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| 301 |
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| 302 | result = curlssl_connect(conn, sockindex);
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| 303 |
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| 304 | if(!result)
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| 305 | Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
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| 306 |
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| 307 | return result;
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| 308 | }
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| 309 |
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| 310 | CURLcode
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| 311 | Curl_ssl_connect_nonblocking(struct connectdata *conn, int sockindex,
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| 312 | bool *done)
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| 313 | {
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| 314 | CURLcode result;
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| 315 |
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| 316 | if(!ssl_prefs_check(conn->data))
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| 317 | return CURLE_SSL_CONNECT_ERROR;
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| 318 |
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| 319 | /* mark this is being ssl requested from here on. */
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| 320 | conn->ssl[sockindex].use = TRUE;
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| 321 | #ifdef curlssl_connect_nonblocking
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| 322 | result = curlssl_connect_nonblocking(conn, sockindex, done);
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| 323 | #else
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| 324 | *done = TRUE; /* fallback to BLOCKING */
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| 325 | result = curlssl_connect(conn, sockindex);
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| 326 | #endif /* non-blocking connect support */
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| 327 | if(!result && *done)
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| 328 | Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
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| 329 | return result;
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| 330 | }
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| 331 |
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| 332 | /*
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| 333 | * Check if there's a session ID for the given connection in the cache, and if
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| 334 | * there's one suitable, it is provided. Returns TRUE when no entry matched.
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| 335 | */
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| 336 | bool Curl_ssl_getsessionid(struct connectdata *conn,
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| 337 | void **ssl_sessionid,
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| 338 | size_t *idsize) /* set 0 if unknown */
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| 339 | {
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| 340 | struct curl_ssl_session *check;
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| 341 | struct SessionHandle *data = conn->data;
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| 342 | size_t i;
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| 343 | long *general_age;
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| 344 | bool no_match = TRUE;
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| 345 |
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| 346 | *ssl_sessionid = NULL;
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| 347 |
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| 348 | if(!conn->ssl_config.sessionid)
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| 349 | /* session ID re-use is disabled */
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| 350 | return TRUE;
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| 351 |
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| 352 | /* Lock if shared */
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| 353 | if(SSLSESSION_SHARED(data)) {
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| 354 | Curl_share_lock(data, CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
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| 355 | general_age = &data->share->sessionage;
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| 356 | }
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| 357 | else
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| 358 | general_age = &data->state.sessionage;
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| 359 |
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| 360 | for(i = 0; i < data->set.ssl.max_ssl_sessions; i++) {
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| 361 | check = &data->state.session[i];
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| 362 | if(!check->sessionid)
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| 363 | /* not session ID means blank entry */
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| 364 | continue;
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| 365 | if(Curl_raw_equal(conn->host.name, check->name) &&
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| 366 | (conn->remote_port == check->remote_port) &&
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| 367 | Curl_ssl_config_matches(&conn->ssl_config, &check->ssl_config)) {
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| 368 | /* yes, we have a session ID! */
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| 369 | (*general_age)++; /* increase general age */
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| 370 | check->age = *general_age; /* set this as used in this age */
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| 371 | *ssl_sessionid = check->sessionid;
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| 372 | if(idsize)
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| 373 | *idsize = check->idsize;
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| 374 | no_match = FALSE;
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| 375 | break;
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| 376 | }
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| 377 | }
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| 378 |
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| 379 | /* Unlock */
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| 380 | if(SSLSESSION_SHARED(data))
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| 381 | Curl_share_unlock(data, CURL_LOCK_DATA_SSL_SESSION);
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| 382 |
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| 383 | return no_match;
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| 384 | }
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| 385 |
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| 386 | /*
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| 387 | * Kill a single session ID entry in the cache.
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| 388 | */
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| 389 | void Curl_ssl_kill_session(struct curl_ssl_session *session)
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| 390 | {
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| 391 | if(session->sessionid) {
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| 392 | /* defensive check */
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| 393 |
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| 394 | /* free the ID the SSL-layer specific way */
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| 395 | curlssl_session_free(session->sessionid);
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| 396 |
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| 397 | session->sessionid = NULL;
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| 398 | session->age = 0; /* fresh */
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| 399 |
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| 400 | Curl_free_ssl_config(&session->ssl_config);
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| 401 |
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| 402 | Curl_safefree(session->name);
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| 403 | }
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| 404 | }
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| 405 |
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| 406 | /*
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| 407 | * Delete the given session ID from the cache.
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| 408 | */
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| 409 | void Curl_ssl_delsessionid(struct connectdata *conn, void *ssl_sessionid)
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| 410 | {
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| 411 | size_t i;
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| 412 | struct SessionHandle *data=conn->data;
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| 413 |
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| 414 | if(SSLSESSION_SHARED(data))
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| 415 | Curl_share_lock(data, CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
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| 416 |
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| 417 | for(i = 0; i < data->set.ssl.max_ssl_sessions; i++) {
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| 418 | struct curl_ssl_session *check = &data->state.session[i];
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| 419 |
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| 420 | if(check->sessionid == ssl_sessionid) {
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| 421 | Curl_ssl_kill_session(check);
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| 422 | break;
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| 423 | }
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| 424 | }
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| 425 |
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| 426 | if(SSLSESSION_SHARED(data))
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| 427 | Curl_share_unlock(data, CURL_LOCK_DATA_SSL_SESSION);
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| 428 | }
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| 429 |
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| 430 | /*
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| 431 | * Store session id in the session cache. The ID passed on to this function
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| 432 | * must already have been extracted and allocated the proper way for the SSL
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| 433 | * layer. Curl_XXXX_session_free() will be called to free/kill the session ID
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| 434 | * later on.
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| 435 | */
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| 436 | CURLcode Curl_ssl_addsessionid(struct connectdata *conn,
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| 437 | void *ssl_sessionid,
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| 438 | size_t idsize)
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| 439 | {
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| 440 | size_t i;
|
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| 441 | struct SessionHandle *data=conn->data; /* the mother of all structs */
|
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| 442 | struct curl_ssl_session *store = &data->state.session[0];
|
---|
| 443 | long oldest_age=data->state.session[0].age; /* zero if unused */
|
---|
| 444 | char *clone_host;
|
---|
| 445 | long *general_age;
|
---|
| 446 |
|
---|
| 447 | /* Even though session ID re-use might be disabled, that only disables USING
|
---|
| 448 | IT. We still store it here in case the re-using is again enabled for an
|
---|
| 449 | upcoming transfer */
|
---|
| 450 |
|
---|
| 451 | clone_host = strdup(conn->host.name);
|
---|
| 452 | if(!clone_host)
|
---|
| 453 | return CURLE_OUT_OF_MEMORY; /* bail out */
|
---|
| 454 |
|
---|
| 455 | /* Now we should add the session ID and the host name to the cache, (remove
|
---|
| 456 | the oldest if necessary) */
|
---|
| 457 |
|
---|
| 458 | /* If using shared SSL session, lock! */
|
---|
| 459 | if(SSLSESSION_SHARED(data)) {
|
---|
| 460 | Curl_share_lock(data, CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
|
---|
| 461 | general_age = &data->share->sessionage;
|
---|
| 462 | }
|
---|
| 463 | else {
|
---|
| 464 | general_age = &data->state.sessionage;
|
---|
| 465 | }
|
---|
| 466 |
|
---|
| 467 | /* find an empty slot for us, or find the oldest */
|
---|
| 468 | for(i = 1; (i < data->set.ssl.max_ssl_sessions) &&
|
---|
| 469 | data->state.session[i].sessionid; i++) {
|
---|
| 470 | if(data->state.session[i].age < oldest_age) {
|
---|
| 471 | oldest_age = data->state.session[i].age;
|
---|
| 472 | store = &data->state.session[i];
|
---|
| 473 | }
|
---|
| 474 | }
|
---|
| 475 | if(i == data->set.ssl.max_ssl_sessions)
|
---|
| 476 | /* cache is full, we must "kill" the oldest entry! */
|
---|
| 477 | Curl_ssl_kill_session(store);
|
---|
| 478 | else
|
---|
| 479 | store = &data->state.session[i]; /* use this slot */
|
---|
| 480 |
|
---|
| 481 | /* now init the session struct wisely */
|
---|
| 482 | store->sessionid = ssl_sessionid;
|
---|
| 483 | store->idsize = idsize;
|
---|
| 484 | store->age = *general_age; /* set current age */
|
---|
| 485 | /* free it if there's one already present */
|
---|
| 486 | free(store->name);
|
---|
| 487 | store->name = clone_host; /* clone host name */
|
---|
| 488 | store->remote_port = conn->remote_port; /* port number */
|
---|
| 489 |
|
---|
| 490 |
|
---|
| 491 | /* Unlock */
|
---|
| 492 | if(SSLSESSION_SHARED(data))
|
---|
| 493 | Curl_share_unlock(data, CURL_LOCK_DATA_SSL_SESSION);
|
---|
| 494 |
|
---|
| 495 | if(!Curl_clone_ssl_config(&conn->ssl_config, &store->ssl_config)) {
|
---|
| 496 | store->sessionid = NULL; /* let caller free sessionid */
|
---|
| 497 | free(clone_host);
|
---|
| 498 | return CURLE_OUT_OF_MEMORY;
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | return CURLE_OK;
|
---|
| 502 | }
|
---|
| 503 |
|
---|
| 504 |
|
---|
| 505 | void Curl_ssl_close_all(struct SessionHandle *data)
|
---|
| 506 | {
|
---|
| 507 | size_t i;
|
---|
| 508 | /* kill the session ID cache if not shared */
|
---|
| 509 | if(data->state.session && !SSLSESSION_SHARED(data)) {
|
---|
| 510 | for(i = 0; i < data->set.ssl.max_ssl_sessions; i++)
|
---|
| 511 | /* the single-killer function handles empty table slots */
|
---|
| 512 | Curl_ssl_kill_session(&data->state.session[i]);
|
---|
| 513 |
|
---|
| 514 | /* free the cache data */
|
---|
| 515 | Curl_safefree(data->state.session);
|
---|
| 516 | }
|
---|
| 517 |
|
---|
| 518 | curlssl_close_all(data);
|
---|
| 519 | }
|
---|
| 520 |
|
---|
| 521 | void Curl_ssl_close(struct connectdata *conn, int sockindex)
|
---|
| 522 | {
|
---|
| 523 | DEBUGASSERT((sockindex <= 1) && (sockindex >= -1));
|
---|
| 524 | curlssl_close(conn, sockindex);
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | CURLcode Curl_ssl_shutdown(struct connectdata *conn, int sockindex)
|
---|
| 528 | {
|
---|
| 529 | if(curlssl_shutdown(conn, sockindex))
|
---|
| 530 | return CURLE_SSL_SHUTDOWN_FAILED;
|
---|
| 531 |
|
---|
| 532 | conn->ssl[sockindex].use = FALSE; /* get back to ordinary socket usage */
|
---|
| 533 | conn->ssl[sockindex].state = ssl_connection_none;
|
---|
| 534 |
|
---|
| 535 | conn->recv[sockindex] = Curl_recv_plain;
|
---|
| 536 | conn->send[sockindex] = Curl_send_plain;
|
---|
| 537 |
|
---|
| 538 | return CURLE_OK;
|
---|
| 539 | }
|
---|
| 540 |
|
---|
| 541 | /* Selects an SSL crypto engine
|
---|
| 542 | */
|
---|
| 543 | CURLcode Curl_ssl_set_engine(struct SessionHandle *data, const char *engine)
|
---|
| 544 | {
|
---|
| 545 | return curlssl_set_engine(data, engine);
|
---|
| 546 | }
|
---|
| 547 |
|
---|
| 548 | /* Selects the default SSL crypto engine
|
---|
| 549 | */
|
---|
| 550 | CURLcode Curl_ssl_set_engine_default(struct SessionHandle *data)
|
---|
| 551 | {
|
---|
| 552 | return curlssl_set_engine_default(data);
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | /* Return list of OpenSSL crypto engine names. */
|
---|
| 556 | struct curl_slist *Curl_ssl_engines_list(struct SessionHandle *data)
|
---|
| 557 | {
|
---|
| 558 | return curlssl_engines_list(data);
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | /*
|
---|
| 562 | * This sets up a session ID cache to the specified size. Make sure this code
|
---|
| 563 | * is agnostic to what underlying SSL technology we use.
|
---|
| 564 | */
|
---|
| 565 | CURLcode Curl_ssl_initsessions(struct SessionHandle *data, size_t amount)
|
---|
| 566 | {
|
---|
| 567 | struct curl_ssl_session *session;
|
---|
| 568 |
|
---|
| 569 | if(data->state.session)
|
---|
| 570 | /* this is just a precaution to prevent multiple inits */
|
---|
| 571 | return CURLE_OK;
|
---|
| 572 |
|
---|
| 573 | session = calloc(amount, sizeof(struct curl_ssl_session));
|
---|
| 574 | if(!session)
|
---|
| 575 | return CURLE_OUT_OF_MEMORY;
|
---|
| 576 |
|
---|
| 577 | /* store the info in the SSL section */
|
---|
| 578 | data->set.ssl.max_ssl_sessions = amount;
|
---|
| 579 | data->state.session = session;
|
---|
| 580 | data->state.sessionage = 1; /* this is brand new */
|
---|
| 581 | return CURLE_OK;
|
---|
| 582 | }
|
---|
| 583 |
|
---|
| 584 | size_t Curl_ssl_version(char *buffer, size_t size)
|
---|
| 585 | {
|
---|
| 586 | return curlssl_version(buffer, size);
|
---|
| 587 | }
|
---|
| 588 |
|
---|
| 589 | /*
|
---|
| 590 | * This function tries to determine connection status.
|
---|
| 591 | *
|
---|
| 592 | * Return codes:
|
---|
| 593 | * 1 means the connection is still in place
|
---|
| 594 | * 0 means the connection has been closed
|
---|
| 595 | * -1 means the connection status is unknown
|
---|
| 596 | */
|
---|
| 597 | int Curl_ssl_check_cxn(struct connectdata *conn)
|
---|
| 598 | {
|
---|
| 599 | return curlssl_check_cxn(conn);
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | bool Curl_ssl_data_pending(const struct connectdata *conn,
|
---|
| 603 | int connindex)
|
---|
| 604 | {
|
---|
| 605 | return curlssl_data_pending(conn, connindex);
|
---|
| 606 | }
|
---|
| 607 |
|
---|
| 608 | void Curl_ssl_free_certinfo(struct SessionHandle *data)
|
---|
| 609 | {
|
---|
| 610 | int i;
|
---|
| 611 | struct curl_certinfo *ci = &data->info.certs;
|
---|
| 612 |
|
---|
| 613 | if(ci->num_of_certs) {
|
---|
| 614 | /* free all individual lists used */
|
---|
| 615 | for(i=0; i<ci->num_of_certs; i++) {
|
---|
| 616 | curl_slist_free_all(ci->certinfo[i]);
|
---|
| 617 | ci->certinfo[i] = NULL;
|
---|
| 618 | }
|
---|
| 619 |
|
---|
| 620 | free(ci->certinfo); /* free the actual array too */
|
---|
| 621 | ci->certinfo = NULL;
|
---|
| 622 | ci->num_of_certs = 0;
|
---|
| 623 | }
|
---|
| 624 | }
|
---|
| 625 |
|
---|
| 626 | CURLcode Curl_ssl_init_certinfo(struct SessionHandle *data, int num)
|
---|
| 627 | {
|
---|
| 628 | struct curl_certinfo *ci = &data->info.certs;
|
---|
| 629 | struct curl_slist **table;
|
---|
| 630 |
|
---|
| 631 | /* Free any previous certificate information structures */
|
---|
| 632 | Curl_ssl_free_certinfo(data);
|
---|
| 633 |
|
---|
| 634 | /* Allocate the required certificate information structures */
|
---|
| 635 | table = calloc((size_t) num, sizeof(struct curl_slist *));
|
---|
| 636 | if(!table)
|
---|
| 637 | return CURLE_OUT_OF_MEMORY;
|
---|
| 638 |
|
---|
| 639 | ci->num_of_certs = num;
|
---|
| 640 | ci->certinfo = table;
|
---|
| 641 |
|
---|
| 642 | return CURLE_OK;
|
---|
| 643 | }
|
---|
| 644 |
|
---|
| 645 | /*
|
---|
| 646 | * 'value' is NOT a zero terminated string
|
---|
| 647 | */
|
---|
| 648 | CURLcode Curl_ssl_push_certinfo_len(struct SessionHandle *data,
|
---|
| 649 | int certnum,
|
---|
| 650 | const char *label,
|
---|
| 651 | const char *value,
|
---|
| 652 | size_t valuelen)
|
---|
| 653 | {
|
---|
| 654 | struct curl_certinfo * ci = &data->info.certs;
|
---|
| 655 | char * output;
|
---|
| 656 | struct curl_slist * nl;
|
---|
| 657 | CURLcode result = CURLE_OK;
|
---|
| 658 | size_t labellen = strlen(label);
|
---|
| 659 | size_t outlen = labellen + 1 + valuelen + 1; /* label:value\0 */
|
---|
| 660 |
|
---|
| 661 | output = malloc(outlen);
|
---|
| 662 | if(!output)
|
---|
| 663 | return CURLE_OUT_OF_MEMORY;
|
---|
| 664 |
|
---|
| 665 | /* sprintf the label and colon */
|
---|
| 666 | snprintf(output, outlen, "%s:", label);
|
---|
| 667 |
|
---|
| 668 | /* memcpy the value (it might not be zero terminated) */
|
---|
| 669 | memcpy(&output[labellen+1], value, valuelen);
|
---|
| 670 |
|
---|
| 671 | /* zero terminate the output */
|
---|
| 672 | output[labellen + 1 + valuelen] = 0;
|
---|
| 673 |
|
---|
| 674 | nl = Curl_slist_append_nodup(ci->certinfo[certnum], output);
|
---|
| 675 | if(!nl) {
|
---|
| 676 | free(output);
|
---|
| 677 | curl_slist_free_all(ci->certinfo[certnum]);
|
---|
| 678 | result = CURLE_OUT_OF_MEMORY;
|
---|
| 679 | }
|
---|
| 680 |
|
---|
| 681 | ci->certinfo[certnum] = nl;
|
---|
| 682 | return result;
|
---|
| 683 | }
|
---|
| 684 |
|
---|
| 685 | /*
|
---|
| 686 | * This is a convenience function for push_certinfo_len that takes a zero
|
---|
| 687 | * terminated value.
|
---|
| 688 | */
|
---|
| 689 | CURLcode Curl_ssl_push_certinfo(struct SessionHandle *data,
|
---|
| 690 | int certnum,
|
---|
| 691 | const char *label,
|
---|
| 692 | const char *value)
|
---|
| 693 | {
|
---|
| 694 | size_t valuelen = strlen(value);
|
---|
| 695 |
|
---|
| 696 | return Curl_ssl_push_certinfo_len(data, certnum, label, value, valuelen);
|
---|
| 697 | }
|
---|
| 698 |
|
---|
| 699 | int Curl_ssl_random(struct SessionHandle *data,
|
---|
| 700 | unsigned char *entropy,
|
---|
| 701 | size_t length)
|
---|
| 702 | {
|
---|
| 703 | return curlssl_random(data, entropy, length);
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | /*
|
---|
| 707 | * Public key pem to der conversion
|
---|
| 708 | */
|
---|
| 709 |
|
---|
| 710 | static CURLcode pubkey_pem_to_der(const char *pem,
|
---|
| 711 | unsigned char **der, size_t *der_len)
|
---|
| 712 | {
|
---|
| 713 | char *stripped_pem, *begin_pos, *end_pos;
|
---|
| 714 | size_t pem_count, stripped_pem_count = 0, pem_len;
|
---|
| 715 | CURLcode result;
|
---|
| 716 |
|
---|
| 717 | /* if no pem, exit. */
|
---|
| 718 | if(!pem)
|
---|
| 719 | return CURLE_BAD_CONTENT_ENCODING;
|
---|
| 720 |
|
---|
| 721 | begin_pos = strstr(pem, "-----BEGIN PUBLIC KEY-----");
|
---|
| 722 | if(!begin_pos)
|
---|
| 723 | return CURLE_BAD_CONTENT_ENCODING;
|
---|
| 724 |
|
---|
| 725 | pem_count = begin_pos - pem;
|
---|
| 726 | /* Invalid if not at beginning AND not directly following \n */
|
---|
| 727 | if(0 != pem_count && '\n' != pem[pem_count - 1])
|
---|
| 728 | return CURLE_BAD_CONTENT_ENCODING;
|
---|
| 729 |
|
---|
| 730 | /* 26 is length of "-----BEGIN PUBLIC KEY-----" */
|
---|
| 731 | pem_count += 26;
|
---|
| 732 |
|
---|
| 733 | /* Invalid if not directly following \n */
|
---|
| 734 | end_pos = strstr(pem + pem_count, "\n-----END PUBLIC KEY-----");
|
---|
| 735 | if(!end_pos)
|
---|
| 736 | return CURLE_BAD_CONTENT_ENCODING;
|
---|
| 737 |
|
---|
| 738 | pem_len = end_pos - pem;
|
---|
| 739 |
|
---|
| 740 | stripped_pem = malloc(pem_len - pem_count + 1);
|
---|
| 741 | if(!stripped_pem)
|
---|
| 742 | return CURLE_OUT_OF_MEMORY;
|
---|
| 743 |
|
---|
| 744 | /*
|
---|
| 745 | * Here we loop through the pem array one character at a time between the
|
---|
| 746 | * correct indices, and place each character that is not '\n' or '\r'
|
---|
| 747 | * into the stripped_pem array, which should represent the raw base64 string
|
---|
| 748 | */
|
---|
| 749 | while(pem_count < pem_len) {
|
---|
| 750 | if('\n' != pem[pem_count] && '\r' != pem[pem_count])
|
---|
| 751 | stripped_pem[stripped_pem_count++] = pem[pem_count];
|
---|
| 752 | ++pem_count;
|
---|
| 753 | }
|
---|
| 754 | /* Place the null terminator in the correct place */
|
---|
| 755 | stripped_pem[stripped_pem_count] = '\0';
|
---|
| 756 |
|
---|
| 757 | result = Curl_base64_decode(stripped_pem, der, der_len);
|
---|
| 758 |
|
---|
| 759 | Curl_safefree(stripped_pem);
|
---|
| 760 |
|
---|
| 761 | return result;
|
---|
| 762 | }
|
---|
| 763 |
|
---|
| 764 | /*
|
---|
| 765 | * Generic pinned public key check.
|
---|
| 766 | */
|
---|
| 767 |
|
---|
| 768 | CURLcode Curl_pin_peer_pubkey(struct SessionHandle *data,
|
---|
| 769 | const char *pinnedpubkey,
|
---|
| 770 | const unsigned char *pubkey, size_t pubkeylen)
|
---|
| 771 | {
|
---|
| 772 | FILE *fp;
|
---|
| 773 | unsigned char *buf = NULL, *pem_ptr = NULL;
|
---|
| 774 | long filesize;
|
---|
| 775 | size_t size, pem_len;
|
---|
| 776 | CURLcode pem_read;
|
---|
| 777 | CURLcode result = CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
| 778 | #ifdef curlssl_sha256sum
|
---|
| 779 | CURLcode encode;
|
---|
| 780 | size_t encodedlen, pinkeylen;
|
---|
| 781 | char *encoded, *pinkeycopy, *begin_pos, *end_pos;
|
---|
| 782 | unsigned char *sha256sumdigest = NULL;
|
---|
| 783 | #endif
|
---|
| 784 |
|
---|
| 785 | /* if a path wasn't specified, don't pin */
|
---|
| 786 | if(!pinnedpubkey)
|
---|
| 787 | return CURLE_OK;
|
---|
| 788 | if(!pubkey || !pubkeylen)
|
---|
| 789 | return result;
|
---|
| 790 |
|
---|
| 791 | #ifdef curlssl_sha256sum
|
---|
| 792 | /* only do this if pinnedpubkey starts with "sha256//", length 8 */
|
---|
| 793 | if(strncmp(pinnedpubkey, "sha256//", 8) == 0) {
|
---|
| 794 | /* compute sha256sum of public key */
|
---|
| 795 | sha256sumdigest = malloc(SHA256_DIGEST_LENGTH);
|
---|
| 796 | if(!sha256sumdigest)
|
---|
| 797 | return CURLE_OUT_OF_MEMORY;
|
---|
| 798 | curlssl_sha256sum(pubkey, pubkeylen,
|
---|
| 799 | sha256sumdigest, SHA256_DIGEST_LENGTH);
|
---|
| 800 | encode = Curl_base64_encode(data, (char *)sha256sumdigest,
|
---|
| 801 | SHA256_DIGEST_LENGTH, &encoded, &encodedlen);
|
---|
| 802 | Curl_safefree(sha256sumdigest);
|
---|
| 803 |
|
---|
| 804 | if(encode)
|
---|
| 805 | return encode;
|
---|
| 806 |
|
---|
| 807 | infof(data, "\t public key hash: sha256//%s\n", encoded);
|
---|
| 808 |
|
---|
| 809 | /* it starts with sha256//, copy so we can modify it */
|
---|
| 810 | pinkeylen = strlen(pinnedpubkey) + 1;
|
---|
| 811 | pinkeycopy = malloc(pinkeylen);
|
---|
| 812 | if(!pinkeycopy) {
|
---|
| 813 | Curl_safefree(encoded);
|
---|
| 814 | return CURLE_OUT_OF_MEMORY;
|
---|
| 815 | }
|
---|
| 816 | memcpy(pinkeycopy, pinnedpubkey, pinkeylen);
|
---|
| 817 | /* point begin_pos to the copy, and start extracting keys */
|
---|
| 818 | begin_pos = pinkeycopy;
|
---|
| 819 | do {
|
---|
| 820 | end_pos = strstr(begin_pos, ";sha256//");
|
---|
| 821 | /*
|
---|
| 822 | * if there is an end_pos, null terminate,
|
---|
| 823 | * otherwise it'll go to the end of the original string
|
---|
| 824 | */
|
---|
| 825 | if(end_pos)
|
---|
| 826 | end_pos[0] = '\0';
|
---|
| 827 |
|
---|
| 828 | /* compare base64 sha256 digests, 8 is the length of "sha256//" */
|
---|
| 829 | if(encodedlen == strlen(begin_pos + 8) &&
|
---|
| 830 | !memcmp(encoded, begin_pos + 8, encodedlen)) {
|
---|
| 831 | result = CURLE_OK;
|
---|
| 832 | break;
|
---|
| 833 | }
|
---|
| 834 |
|
---|
| 835 | /*
|
---|
| 836 | * change back the null-terminator we changed earlier,
|
---|
| 837 | * and look for next begin
|
---|
| 838 | */
|
---|
| 839 | if(end_pos) {
|
---|
| 840 | end_pos[0] = ';';
|
---|
| 841 | begin_pos = strstr(end_pos, "sha256//");
|
---|
| 842 | }
|
---|
| 843 | } while(end_pos && begin_pos);
|
---|
| 844 | Curl_safefree(encoded);
|
---|
| 845 | Curl_safefree(pinkeycopy);
|
---|
| 846 | return result;
|
---|
| 847 | }
|
---|
| 848 | #else
|
---|
| 849 | (void)data;
|
---|
| 850 | #endif
|
---|
| 851 |
|
---|
| 852 | fp = fopen(pinnedpubkey, "rb");
|
---|
| 853 | if(!fp)
|
---|
| 854 | return result;
|
---|
| 855 |
|
---|
| 856 | do {
|
---|
| 857 | /* Determine the file's size */
|
---|
| 858 | if(fseek(fp, 0, SEEK_END))
|
---|
| 859 | break;
|
---|
| 860 | filesize = ftell(fp);
|
---|
| 861 | if(fseek(fp, 0, SEEK_SET))
|
---|
| 862 | break;
|
---|
| 863 | if(filesize < 0 || filesize > MAX_PINNED_PUBKEY_SIZE)
|
---|
| 864 | break;
|
---|
| 865 |
|
---|
| 866 | /*
|
---|
| 867 | * if the size of our certificate is bigger than the file
|
---|
| 868 | * size then it can't match
|
---|
| 869 | */
|
---|
| 870 | size = curlx_sotouz((curl_off_t) filesize);
|
---|
| 871 | if(pubkeylen > size)
|
---|
| 872 | break;
|
---|
| 873 |
|
---|
| 874 | /*
|
---|
| 875 | * Allocate buffer for the pinned key
|
---|
| 876 | * With 1 additional byte for null terminator in case of PEM key
|
---|
| 877 | */
|
---|
| 878 | buf = malloc(size + 1);
|
---|
| 879 | if(!buf)
|
---|
| 880 | break;
|
---|
| 881 |
|
---|
| 882 | /* Returns number of elements read, which should be 1 */
|
---|
| 883 | if((int) fread(buf, size, 1, fp) != 1)
|
---|
| 884 | break;
|
---|
| 885 |
|
---|
| 886 | /* If the sizes are the same, it can't be base64 encoded, must be der */
|
---|
| 887 | if(pubkeylen == size) {
|
---|
| 888 | if(!memcmp(pubkey, buf, pubkeylen))
|
---|
| 889 | result = CURLE_OK;
|
---|
| 890 | break;
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 | /*
|
---|
| 894 | * Otherwise we will assume it's PEM and try to decode it
|
---|
| 895 | * after placing null terminator
|
---|
| 896 | */
|
---|
| 897 | buf[size] = '\0';
|
---|
| 898 | pem_read = pubkey_pem_to_der((const char *)buf, &pem_ptr, &pem_len);
|
---|
| 899 | /* if it wasn't read successfully, exit */
|
---|
| 900 | if(pem_read)
|
---|
| 901 | break;
|
---|
| 902 |
|
---|
| 903 | /*
|
---|
| 904 | * if the size of our certificate doesn't match the size of
|
---|
| 905 | * the decoded file, they can't be the same, otherwise compare
|
---|
| 906 | */
|
---|
| 907 | if(pubkeylen == pem_len && !memcmp(pubkey, pem_ptr, pubkeylen))
|
---|
| 908 | result = CURLE_OK;
|
---|
| 909 | } while(0);
|
---|
| 910 |
|
---|
| 911 | Curl_safefree(buf);
|
---|
| 912 | Curl_safefree(pem_ptr);
|
---|
| 913 | fclose(fp);
|
---|
| 914 |
|
---|
| 915 | return result;
|
---|
| 916 | }
|
---|
| 917 |
|
---|
| 918 | #ifndef CURL_DISABLE_CRYPTO_AUTH
|
---|
| 919 | CURLcode Curl_ssl_md5sum(unsigned char *tmp, /* input */
|
---|
| 920 | size_t tmplen,
|
---|
| 921 | unsigned char *md5sum, /* output */
|
---|
| 922 | size_t md5len)
|
---|
| 923 | {
|
---|
| 924 | #ifdef curlssl_md5sum
|
---|
| 925 | curlssl_md5sum(tmp, tmplen, md5sum, md5len);
|
---|
| 926 | #else
|
---|
| 927 | MD5_context *MD5pw;
|
---|
| 928 |
|
---|
| 929 | (void) md5len;
|
---|
| 930 |
|
---|
| 931 | MD5pw = Curl_MD5_init(Curl_DIGEST_MD5);
|
---|
| 932 | if(!MD5pw)
|
---|
| 933 | return CURLE_OUT_OF_MEMORY;
|
---|
| 934 | Curl_MD5_update(MD5pw, tmp, curlx_uztoui(tmplen));
|
---|
| 935 | Curl_MD5_final(MD5pw, md5sum);
|
---|
| 936 | #endif
|
---|
| 937 | return CURLE_OK;
|
---|
| 938 | }
|
---|
| 939 | #endif
|
---|
| 940 |
|
---|
| 941 | /*
|
---|
| 942 | * Check whether the SSL backend supports the status_request extension.
|
---|
| 943 | */
|
---|
| 944 | bool Curl_ssl_cert_status_request(void)
|
---|
| 945 | {
|
---|
| 946 | #ifdef curlssl_cert_status_request
|
---|
| 947 | return curlssl_cert_status_request();
|
---|
| 948 | #else
|
---|
| 949 | return FALSE;
|
---|
| 950 | #endif
|
---|
| 951 | }
|
---|
| 952 |
|
---|
| 953 | /*
|
---|
| 954 | * Check whether the SSL backend supports false start.
|
---|
| 955 | */
|
---|
| 956 | bool Curl_ssl_false_start(void)
|
---|
| 957 | {
|
---|
| 958 | #ifdef curlssl_false_start
|
---|
| 959 | return curlssl_false_start();
|
---|
| 960 | #else
|
---|
| 961 | return FALSE;
|
---|
| 962 | #endif
|
---|
| 963 | }
|
---|
| 964 |
|
---|
| 965 | #endif /* USE_SSL */
|
---|