curl/lib/vtls/openssl.h
Daniel Stenberg 3b5c75ef3d OpenSSL: deselect weak ciphers by default
By default even recent versions of OpenSSL support and accept both
"export strength" ciphers, small-bitsize ciphers as well as downright
deprecated ones.

This change sets a default cipher set that avoids the worst ciphers, and
subsequently makes https://www.howsmyssl.com/a/check no longer grade
curl/OpenSSL connects as 'Bad'.

Bug: http://curl.haxx.se/bug/view.cgi?id=1323
Reported-by: Jeff Hodges
2014-01-12 00:14:01 +01:00

102 lines
3.9 KiB
C

#ifndef HEADER_CURL_SSLUSE_H
#define HEADER_CURL_SSLUSE_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_SSLEAY
/*
* This header should only be needed to get included by vtls.c and openssl.c
*/
#include "urldata.h"
CURLcode Curl_ossl_connect(struct connectdata *conn, int sockindex);
CURLcode Curl_ossl_connect_nonblocking(struct connectdata *conn,
int sockindex,
bool *done);
/* close a SSL connection */
void Curl_ossl_close(struct connectdata *conn, int sockindex);
/* tell OpenSSL to close down all open information regarding connections (and
thus session ID caching etc) */
int Curl_ossl_close_all(struct SessionHandle *data);
/* Sets an OpenSSL engine */
CURLcode Curl_ossl_set_engine(struct SessionHandle *data, const char *engine);
/* function provided for the generic SSL-layer, called when a session id
should be freed */
void Curl_ossl_session_free(void *ptr);
/* Sets engine as default for all SSL operations */
CURLcode Curl_ossl_set_engine_default(struct SessionHandle *data);
/* Build list of OpenSSL engines */
struct curl_slist *Curl_ossl_engines_list(struct SessionHandle *data);
int Curl_ossl_init(void);
void Curl_ossl_cleanup(void);
size_t Curl_ossl_version(char *buffer, size_t size);
int Curl_ossl_check_cxn(struct connectdata *cxn);
int Curl_ossl_seed(struct SessionHandle *data);
int Curl_ossl_shutdown(struct connectdata *conn, int sockindex);
bool Curl_ossl_data_pending(const struct connectdata *conn,
int connindex);
void Curl_ossl_random(struct SessionHandle *data, unsigned char *entropy,
size_t length);
void Curl_ossl_md5sum(unsigned char *tmp, /* input */
size_t tmplen,
unsigned char *md5sum /* output */,
size_t unused);
/* this backend provides these functions: */
#define have_curlssl_random 1
#define have_curlssl_md5sum 1
/* API setup for OpenSSL */
#define curlssl_init Curl_ossl_init
#define curlssl_cleanup Curl_ossl_cleanup
#define curlssl_connect Curl_ossl_connect
#define curlssl_connect_nonblocking Curl_ossl_connect_nonblocking
#define curlssl_session_free(x) Curl_ossl_session_free(x)
#define curlssl_close_all Curl_ossl_close_all
#define curlssl_close Curl_ossl_close
#define curlssl_shutdown(x,y) Curl_ossl_shutdown(x,y)
#define curlssl_set_engine(x,y) Curl_ossl_set_engine(x,y)
#define curlssl_set_engine_default(x) Curl_ossl_set_engine_default(x)
#define curlssl_engines_list(x) Curl_ossl_engines_list(x)
#define curlssl_version Curl_ossl_version
#define curlssl_check_cxn Curl_ossl_check_cxn
#define curlssl_data_pending(x,y) Curl_ossl_data_pending(x,y)
#define curlssl_random(x,y,z) Curl_ossl_random(x,y,z)
#define curlssl_md5sum(a,b,c,d) Curl_ossl_md5sum(a,b,c,d)
#define DEFAULT_CIPHER_SELECTION "ALL!EXPORT!EXPORT40!EXPORT56!aNULL!LOW!RC4"
#endif /* USE_SSLEAY */
#endif /* HEADER_CURL_SSLUSE_H */