mirror of
https://github.com/moparisthebest/curl
synced 2024-11-15 22:15:13 -05:00
a439e438f3
Each backend now defines CURL_SSL_BACKEND accordingly. Added the *AXTLS one which was missing previously.
706 lines
19 KiB
C
706 lines
19 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* This file is for implementing all "generic" SSL functions that all libcurl
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internals should use. It is then responsible for calling the proper
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"backend" function.
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SSL-functions in libcurl should call functions in this source file, and not
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to any specific SSL-layer.
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Curl_ssl_ - prefix for generic ones
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Curl_ossl_ - prefix for OpenSSL ones
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Curl_gtls_ - prefix for GnuTLS ones
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Curl_nss_ - prefix for NSS ones
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Curl_qssl_ - prefix for QsoSSL ones
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Curl_gskit_ - prefix for GSKit ones
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Curl_polarssl_ - prefix for PolarSSL ones
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Curl_cyassl_ - prefix for CyaSSL ones
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Curl_schannel_ - prefix for Schannel SSPI ones
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Curl_darwinssl_ - prefix for SecureTransport (Darwin) ones
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Note that this source code uses curlssl_* functions, and they are all
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defines/macros #defined by the lib-specific header files.
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"SSL/TLS Strong Encryption: An Introduction"
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http://httpd.apache.org/docs-2.0/ssl/ssl_intro.html
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*/
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#include "curl_setup.h"
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include "urldata.h"
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#include "vtls.h" /* generic SSL protos etc */
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#include "openssl.h" /* OpenSSL versions */
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#include "gtls.h" /* GnuTLS versions */
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#include "nssg.h" /* NSS versions */
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#include "qssl.h" /* QSOSSL versions */
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#include "gskit.h" /* Global Secure ToolKit versions */
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#include "polarssl.h" /* PolarSSL versions */
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#include "axtls.h" /* axTLS versions */
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#include "cyassl.h" /* CyaSSL versions */
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#include "curl_schannel.h" /* Schannel SSPI version */
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#include "curl_darwinssl.h" /* SecureTransport (Darwin) version */
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#include "slist.h"
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#include "sendf.h"
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#include "rawstr.h"
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#include "url.h"
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#include "curl_memory.h"
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#include "progress.h"
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#include "share.h"
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#include "timeval.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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/* The last #include file should be: */
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#include "memdebug.h"
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/* convenience macro to check if this handle is using a shared SSL session */
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#define SSLSESSION_SHARED(data) (data->share && \
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(data->share->specifier & \
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(1<<CURL_LOCK_DATA_SSL_SESSION)))
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static bool safe_strequal(char* str1, char* str2)
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{
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if(str1 && str2)
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/* both pointers point to something then compare them */
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return (0 != Curl_raw_equal(str1, str2)) ? TRUE : FALSE;
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else
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/* if both pointers are NULL then treat them as equal */
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return (!str1 && !str2) ? TRUE : FALSE;
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}
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bool
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Curl_ssl_config_matches(struct ssl_config_data* data,
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struct ssl_config_data* needle)
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{
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if((data->version == needle->version) &&
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(data->verifypeer == needle->verifypeer) &&
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(data->verifyhost == needle->verifyhost) &&
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safe_strequal(data->CApath, needle->CApath) &&
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safe_strequal(data->CAfile, needle->CAfile) &&
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safe_strequal(data->random_file, needle->random_file) &&
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safe_strequal(data->egdsocket, needle->egdsocket) &&
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safe_strequal(data->cipher_list, needle->cipher_list))
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return TRUE;
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return FALSE;
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}
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bool
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Curl_clone_ssl_config(struct ssl_config_data *source,
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struct ssl_config_data *dest)
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{
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dest->sessionid = source->sessionid;
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dest->verifyhost = source->verifyhost;
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dest->verifypeer = source->verifypeer;
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dest->version = source->version;
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if(source->CAfile) {
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dest->CAfile = strdup(source->CAfile);
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if(!dest->CAfile)
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return FALSE;
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}
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else
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dest->CAfile = NULL;
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if(source->CApath) {
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dest->CApath = strdup(source->CApath);
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if(!dest->CApath)
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return FALSE;
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}
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else
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dest->CApath = NULL;
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if(source->cipher_list) {
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dest->cipher_list = strdup(source->cipher_list);
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if(!dest->cipher_list)
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return FALSE;
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}
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else
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dest->cipher_list = NULL;
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if(source->egdsocket) {
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dest->egdsocket = strdup(source->egdsocket);
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if(!dest->egdsocket)
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return FALSE;
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}
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else
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dest->egdsocket = NULL;
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if(source->random_file) {
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dest->random_file = strdup(source->random_file);
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if(!dest->random_file)
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return FALSE;
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}
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else
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dest->random_file = NULL;
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return TRUE;
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}
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void Curl_free_ssl_config(struct ssl_config_data* sslc)
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{
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Curl_safefree(sslc->CAfile);
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Curl_safefree(sslc->CApath);
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Curl_safefree(sslc->cipher_list);
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Curl_safefree(sslc->egdsocket);
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Curl_safefree(sslc->random_file);
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}
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/*
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* Curl_rand() returns a random unsigned integer, 32bit.
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*
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* This non-SSL function is put here only because this file is the only one
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* with knowledge of what the underlying SSL libraries provide in terms of
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* randomizers.
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*
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* NOTE: 'data' may be passed in as NULL when coming from external API without
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* easy handle!
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*
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*/
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unsigned int Curl_rand(struct SessionHandle *data)
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{
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unsigned int r;
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static unsigned int randseed;
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static bool seeded = FALSE;
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#ifdef CURLDEBUG
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char *force_entropy = getenv("CURL_ENTROPY");
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if(force_entropy) {
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if(!seeded) {
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size_t elen = strlen(force_entropy);
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size_t clen = sizeof(randseed);
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size_t min = elen < clen ? elen : clen;
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memcpy((char *)&randseed, force_entropy, min);
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seeded = TRUE;
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}
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else
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randseed++;
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return randseed;
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}
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#endif
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/* data may be NULL! */
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if(!Curl_ssl_random(data, (unsigned char *)&r, sizeof(r)))
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return r;
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/* If Curl_ssl_random() returns non-zero it couldn't offer randomness and we
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instead perform a "best effort" */
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#ifdef RANDOM_FILE
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if(!seeded) {
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/* if there's a random file to read a seed from, use it */
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int fd = open(RANDOM_FILE, O_RDONLY);
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if(fd > -1) {
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/* read random data into the randseed variable */
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ssize_t nread = read(fd, &randseed, sizeof(randseed));
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if(nread == sizeof(randseed))
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seeded = TRUE;
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close(fd);
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}
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}
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#endif
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if(!seeded) {
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struct timeval now = curlx_tvnow();
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infof(data, "WARNING: Using weak random seed\n");
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randseed += (unsigned int)now.tv_usec + (unsigned int)now.tv_sec;
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randseed = randseed * 1103515245 + 12345;
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randseed = randseed * 1103515245 + 12345;
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randseed = randseed * 1103515245 + 12345;
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seeded = TRUE;
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}
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/* Return an unsigned 32-bit pseudo-random number. */
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r = randseed = randseed * 1103515245 + 12345;
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return (r << 16) | ((r >> 16) & 0xFFFF);
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}
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#ifdef USE_SSL
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/* "global" init done? */
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static bool init_ssl=FALSE;
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/**
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* Global SSL init
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*
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* @retval 0 error initializing SSL
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* @retval 1 SSL initialized successfully
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*/
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int Curl_ssl_init(void)
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{
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/* make sure this is only done once */
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if(init_ssl)
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return 1;
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init_ssl = TRUE; /* never again */
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return curlssl_init();
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}
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/* Global cleanup */
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void Curl_ssl_cleanup(void)
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{
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if(init_ssl) {
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/* only cleanup if we did a previous init */
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curlssl_cleanup();
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init_ssl = FALSE;
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}
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}
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CURLcode
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Curl_ssl_connect(struct connectdata *conn, int sockindex)
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{
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CURLcode res;
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/* mark this is being ssl-enabled from here on. */
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conn->ssl[sockindex].use = TRUE;
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conn->ssl[sockindex].state = ssl_connection_negotiating;
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res = curlssl_connect(conn, sockindex);
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if(!res)
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Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
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return res;
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}
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CURLcode
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Curl_ssl_connect_nonblocking(struct connectdata *conn, int sockindex,
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bool *done)
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{
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CURLcode res;
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/* mark this is being ssl requested from here on. */
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conn->ssl[sockindex].use = TRUE;
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#ifdef curlssl_connect_nonblocking
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res = curlssl_connect_nonblocking(conn, sockindex, done);
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#else
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*done = TRUE; /* fallback to BLOCKING */
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res = curlssl_connect(conn, sockindex);
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#endif /* non-blocking connect support */
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if(!res && *done)
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Curl_pgrsTime(conn->data, TIMER_APPCONNECT); /* SSL is connected */
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return res;
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}
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/*
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* Check if there's a session ID for the given connection in the cache, and if
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* there's one suitable, it is provided. Returns TRUE when no entry matched.
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*/
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int Curl_ssl_getsessionid(struct connectdata *conn,
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void **ssl_sessionid,
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size_t *idsize) /* set 0 if unknown */
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{
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struct curl_ssl_session *check;
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struct SessionHandle *data = conn->data;
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size_t i;
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long *general_age;
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bool no_match = TRUE;
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*ssl_sessionid = NULL;
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if(!conn->ssl_config.sessionid)
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/* session ID re-use is disabled */
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return TRUE;
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/* Lock if shared */
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if(SSLSESSION_SHARED(data)) {
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Curl_share_lock(data, CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
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general_age = &data->share->sessionage;
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}
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else
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general_age = &data->state.sessionage;
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for(i = 0; i < data->set.ssl.max_ssl_sessions; i++) {
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check = &data->state.session[i];
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if(!check->sessionid)
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/* not session ID means blank entry */
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continue;
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if(Curl_raw_equal(conn->host.name, check->name) &&
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(conn->remote_port == check->remote_port) &&
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Curl_ssl_config_matches(&conn->ssl_config, &check->ssl_config)) {
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/* yes, we have a session ID! */
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(*general_age)++; /* increase general age */
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check->age = *general_age; /* set this as used in this age */
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*ssl_sessionid = check->sessionid;
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if(idsize)
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*idsize = check->idsize;
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no_match = FALSE;
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break;
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}
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}
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/* Unlock */
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if(SSLSESSION_SHARED(data))
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Curl_share_unlock(data, CURL_LOCK_DATA_SSL_SESSION);
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return no_match;
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}
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/*
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* Kill a single session ID entry in the cache.
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*/
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void Curl_ssl_kill_session(struct curl_ssl_session *session)
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{
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if(session->sessionid) {
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/* defensive check */
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/* free the ID the SSL-layer specific way */
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curlssl_session_free(session->sessionid);
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session->sessionid = NULL;
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session->age = 0; /* fresh */
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Curl_free_ssl_config(&session->ssl_config);
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Curl_safefree(session->name);
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}
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}
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/*
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* Delete the given session ID from the cache.
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*/
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void Curl_ssl_delsessionid(struct connectdata *conn, void *ssl_sessionid)
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{
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size_t i;
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struct SessionHandle *data=conn->data;
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if(SSLSESSION_SHARED(data))
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Curl_share_lock(data, CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
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for(i = 0; i < data->set.ssl.max_ssl_sessions; i++) {
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struct curl_ssl_session *check = &data->state.session[i];
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if(check->sessionid == ssl_sessionid) {
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Curl_ssl_kill_session(check);
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break;
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}
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}
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if(SSLSESSION_SHARED(data))
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Curl_share_unlock(data, CURL_LOCK_DATA_SSL_SESSION);
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}
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/*
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* Store session id in the session cache. The ID passed on to this function
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* must already have been extracted and allocated the proper way for the SSL
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* layer. Curl_XXXX_session_free() will be called to free/kill the session ID
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* later on.
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*/
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CURLcode Curl_ssl_addsessionid(struct connectdata *conn,
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void *ssl_sessionid,
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size_t idsize)
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{
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size_t i;
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struct SessionHandle *data=conn->data; /* the mother of all structs */
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struct curl_ssl_session *store = &data->state.session[0];
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long oldest_age=data->state.session[0].age; /* zero if unused */
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char *clone_host;
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long *general_age;
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/* Even though session ID re-use might be disabled, that only disables USING
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IT. We still store it here in case the re-using is again enabled for an
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upcoming transfer */
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clone_host = strdup(conn->host.name);
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if(!clone_host)
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return CURLE_OUT_OF_MEMORY; /* bail out */
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/* Now we should add the session ID and the host name to the cache, (remove
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the oldest if necessary) */
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/* If using shared SSL session, lock! */
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if(SSLSESSION_SHARED(data)) {
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Curl_share_lock(data, CURL_LOCK_DATA_SSL_SESSION, CURL_LOCK_ACCESS_SINGLE);
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general_age = &data->share->sessionage;
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}
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else {
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general_age = &data->state.sessionage;
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}
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/* find an empty slot for us, or find the oldest */
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for(i = 1; (i < data->set.ssl.max_ssl_sessions) &&
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data->state.session[i].sessionid; i++) {
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if(data->state.session[i].age < oldest_age) {
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oldest_age = data->state.session[i].age;
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store = &data->state.session[i];
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}
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}
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if(i == data->set.ssl.max_ssl_sessions)
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/* cache is full, we must "kill" the oldest entry! */
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Curl_ssl_kill_session(store);
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else
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store = &data->state.session[i]; /* use this slot */
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/* now init the session struct wisely */
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store->sessionid = ssl_sessionid;
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store->idsize = idsize;
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store->age = *general_age; /* set current age */
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if(store->name)
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/* free it if there's one already present */
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free(store->name);
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store->name = clone_host; /* clone host name */
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store->remote_port = conn->remote_port; /* port number */
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/* Unlock */
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if(SSLSESSION_SHARED(data))
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Curl_share_unlock(data, CURL_LOCK_DATA_SSL_SESSION);
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if(!Curl_clone_ssl_config(&conn->ssl_config, &store->ssl_config)) {
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store->sessionid = NULL; /* let caller free sessionid */
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free(clone_host);
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return CURLE_OUT_OF_MEMORY;
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}
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return CURLE_OK;
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}
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void Curl_ssl_close_all(struct SessionHandle *data)
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{
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size_t i;
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/* kill the session ID cache if not shared */
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if(data->state.session && !SSLSESSION_SHARED(data)) {
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for(i = 0; i < data->set.ssl.max_ssl_sessions; i++)
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/* the single-killer function handles empty table slots */
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Curl_ssl_kill_session(&data->state.session[i]);
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/* free the cache data */
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Curl_safefree(data->state.session);
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}
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curlssl_close_all(data);
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}
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void Curl_ssl_close(struct connectdata *conn, int sockindex)
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{
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DEBUGASSERT((sockindex <= 1) && (sockindex >= -1));
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curlssl_close(conn, sockindex);
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}
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CURLcode Curl_ssl_shutdown(struct connectdata *conn, int sockindex)
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{
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if(curlssl_shutdown(conn, sockindex))
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return CURLE_SSL_SHUTDOWN_FAILED;
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|
|
conn->ssl[sockindex].use = FALSE; /* get back to ordinary socket usage */
|
|
conn->ssl[sockindex].state = ssl_connection_none;
|
|
|
|
conn->recv[sockindex] = Curl_recv_plain;
|
|
conn->send[sockindex] = Curl_send_plain;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Selects an SSL crypto engine
|
|
*/
|
|
CURLcode Curl_ssl_set_engine(struct SessionHandle *data, const char *engine)
|
|
{
|
|
return curlssl_set_engine(data, engine);
|
|
}
|
|
|
|
/* Selects the default SSL crypto engine
|
|
*/
|
|
CURLcode Curl_ssl_set_engine_default(struct SessionHandle *data)
|
|
{
|
|
return curlssl_set_engine_default(data);
|
|
}
|
|
|
|
/* Return list of OpenSSL crypto engine names. */
|
|
struct curl_slist *Curl_ssl_engines_list(struct SessionHandle *data)
|
|
{
|
|
return curlssl_engines_list(data);
|
|
}
|
|
|
|
/*
|
|
* This sets up a session ID cache to the specified size. Make sure this code
|
|
* is agnostic to what underlying SSL technology we use.
|
|
*/
|
|
CURLcode Curl_ssl_initsessions(struct SessionHandle *data, size_t amount)
|
|
{
|
|
struct curl_ssl_session *session;
|
|
|
|
if(data->state.session)
|
|
/* this is just a precaution to prevent multiple inits */
|
|
return CURLE_OK;
|
|
|
|
session = calloc(amount, sizeof(struct curl_ssl_session));
|
|
if(!session)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* store the info in the SSL section */
|
|
data->set.ssl.max_ssl_sessions = amount;
|
|
data->state.session = session;
|
|
data->state.sessionage = 1; /* this is brand new */
|
|
return CURLE_OK;
|
|
}
|
|
|
|
size_t Curl_ssl_version(char *buffer, size_t size)
|
|
{
|
|
return curlssl_version(buffer, size);
|
|
}
|
|
|
|
/*
|
|
* This function tries to determine connection status.
|
|
*
|
|
* Return codes:
|
|
* 1 means the connection is still in place
|
|
* 0 means the connection has been closed
|
|
* -1 means the connection status is unknown
|
|
*/
|
|
int Curl_ssl_check_cxn(struct connectdata *conn)
|
|
{
|
|
return curlssl_check_cxn(conn);
|
|
}
|
|
|
|
bool Curl_ssl_data_pending(const struct connectdata *conn,
|
|
int connindex)
|
|
{
|
|
return curlssl_data_pending(conn, connindex);
|
|
}
|
|
|
|
void Curl_ssl_free_certinfo(struct SessionHandle *data)
|
|
{
|
|
int i;
|
|
struct curl_certinfo *ci = &data->info.certs;
|
|
if(ci->num_of_certs) {
|
|
/* free all individual lists used */
|
|
for(i=0; i<ci->num_of_certs; i++) {
|
|
curl_slist_free_all(ci->certinfo[i]);
|
|
ci->certinfo[i] = NULL;
|
|
}
|
|
free(ci->certinfo); /* free the actual array too */
|
|
ci->certinfo = NULL;
|
|
ci->num_of_certs = 0;
|
|
}
|
|
}
|
|
|
|
int Curl_ssl_init_certinfo(struct SessionHandle * data,
|
|
int num)
|
|
{
|
|
struct curl_certinfo * ci = &data->info.certs;
|
|
struct curl_slist * * table;
|
|
|
|
/* Initialize the certificate information structures. Return 0 if OK, else 1.
|
|
*/
|
|
Curl_ssl_free_certinfo(data);
|
|
ci->num_of_certs = num;
|
|
table = calloc((size_t) num, sizeof(struct curl_slist *));
|
|
if(!table)
|
|
return 1;
|
|
|
|
ci->certinfo = table;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 'value' is NOT a zero terminated string
|
|
*/
|
|
CURLcode Curl_ssl_push_certinfo_len(struct SessionHandle *data,
|
|
int certnum,
|
|
const char *label,
|
|
const char *value,
|
|
size_t valuelen)
|
|
{
|
|
struct curl_certinfo * ci = &data->info.certs;
|
|
char * output;
|
|
struct curl_slist * nl;
|
|
CURLcode res = CURLE_OK;
|
|
size_t labellen = strlen(label);
|
|
size_t outlen = labellen + 1 + valuelen + 1; /* label:value\0 */
|
|
|
|
output = malloc(outlen);
|
|
if(!output)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* sprintf the label and colon */
|
|
snprintf(output, outlen, "%s:", label);
|
|
|
|
/* memcpy the value (it might not be zero terminated) */
|
|
memcpy(&output[labellen+1], value, valuelen);
|
|
|
|
/* zero terminate the output */
|
|
output[labellen + 1 + valuelen] = 0;
|
|
|
|
nl = Curl_slist_append_nodup(ci->certinfo[certnum], output);
|
|
if(!nl) {
|
|
free(output);
|
|
curl_slist_free_all(ci->certinfo[certnum]);
|
|
res = CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
ci->certinfo[certnum] = nl;
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* This is a convenience function for push_certinfo_len that takes a zero
|
|
* terminated value.
|
|
*/
|
|
CURLcode Curl_ssl_push_certinfo(struct SessionHandle *data,
|
|
int certnum,
|
|
const char *label,
|
|
const char *value)
|
|
{
|
|
size_t valuelen = strlen(value);
|
|
|
|
return Curl_ssl_push_certinfo_len(data, certnum, label, value, valuelen);
|
|
}
|
|
|
|
int Curl_ssl_random(struct SessionHandle *data,
|
|
unsigned char *entropy,
|
|
size_t length)
|
|
{
|
|
return curlssl_random(data, entropy, length);
|
|
}
|
|
|
|
#ifdef have_curlssl_md5sum
|
|
void Curl_ssl_md5sum(unsigned char *tmp, /* input */
|
|
size_t tmplen,
|
|
unsigned char *md5sum, /* output */
|
|
size_t md5len)
|
|
{
|
|
curlssl_md5sum(tmp, tmplen, md5sum, md5len);
|
|
}
|
|
#endif
|
|
|
|
int Curl_ssl_backend(void)
|
|
{
|
|
return (int)CURL_SSL_BACKEND;
|
|
}
|
|
|
|
#endif /* USE_SSL */
|