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proxy: Support HTTPS proxy and SOCKS+HTTP(s)

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* HTTPS proxies:

An HTTPS proxy receives all transactions over an SSL/TLS connection.
Once a secure connection with the proxy is established, the user agent
uses the proxy as usual, including sending CONNECT requests to instruct
the proxy to establish a [usually secure] TCP tunnel with an origin
server. HTTPS proxies protect nearly all aspects of user-proxy
communications as opposed to HTTP proxies that receive all requests
(including CONNECT requests) in vulnerable clear text.

With HTTPS proxies, it is possible to have two concurrent _nested_
SSL/TLS sessions: the "outer" one between the user agent and the proxy
and the "inner" one between the user agent and the origin server
(through the proxy). This change adds supports for such nested sessions
as well.

A secure connection with a proxy requires its own set of the usual SSL
options (their actual descriptions differ and need polishing, see TODO):

  --proxy-cacert FILE        CA certificate to verify peer against
  --proxy-capath DIR         CA directory to verify peer against
  --proxy-cert CERT[:PASSWD] Client certificate file and password
  --proxy-cert-type TYPE     Certificate file type (DER/PEM/ENG)
  --proxy-ciphers LIST       SSL ciphers to use
  --proxy-crlfile FILE       Get a CRL list in PEM format from the file
  --proxy-insecure           Allow connections to proxies with bad certs
  --proxy-key KEY            Private key file name
  --proxy-key-type TYPE      Private key file type (DER/PEM/ENG)
  --proxy-pass PASS          Pass phrase for the private key
  --proxy-ssl-allow-beast    Allow security flaw to improve interop
  --proxy-sslv2              Use SSLv2
  --proxy-sslv3              Use SSLv3
  --proxy-tlsv1              Use TLSv1
  --proxy-tlsuser USER       TLS username
  --proxy-tlspassword STRING TLS password
  --proxy-tlsauthtype STRING TLS authentication type (default SRP)

All --proxy-foo options are independent from their --foo counterparts,
except --proxy-crlfile which defaults to --crlfile and --proxy-capath
which defaults to --capath.

Curl now also supports %{proxy_ssl_verify_result} --write-out variable,
similar to the existing %{ssl_verify_result} variable.

Supported backends: OpenSSL, GnuTLS, and NSS.

* A SOCKS proxy + HTTP/HTTPS proxy combination:

If both --socks* and --proxy options are given, Curl first connects to
the SOCKS proxy and then connects (through SOCKS) to the HTTP or HTTPS
proxy.

TODO: Update documentation for the new APIs and --proxy-* options.
Look for "Added in 7.XXX" marks.
This commit is contained in:
Alex Rousskov 2016-11-16 10:49:15 -07:00 • committed by Daniel Stenberg
parent 8034d8fc62
commit cb4e2be7c6
76 changed files with 3413 additions and 962 deletions
Download patch file Download diff file Expand all files Collapse all files

51
docs/curl.1
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@ -1468,6 +1468,33 @@ the default authentication method curl uses with proxies.
.IP "--proxy-digest"
Tells curl to use HTTP Digest authentication when communicating with the given
proxy. Use \fI--digest\fP for enabling HTTP Digest with a remote host.
.IP "--proxy-cacert <CA certificate>"
(SSL) Same as --cacert but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-capath <CA certificate directory>"
(SSL) Same as --capath but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-cert <certificate[:password]>"
(SSL) Same as \fI--cert\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-cert-type <type>"
(SSL) Same as \fI--cert-type\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-ciphers <list of ciphers>"
(SSL) Same as \fI--ciphers\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-crlfile <file>"
(HTTPS) Same as \fI--crlfile\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-insecure"
(SSL) Same as \fI--insecure\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-key <key>"
(SSL) Same as \fI--key\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-key-type <type>"
(SSL) Same as \fI--key-type\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-negotiate"
Tells curl to use HTTP Negotiate (SPNEGO) authentication when communicating
with the given proxy. Use \fI--negotiate\fP for enabling HTTP Negotiate (SPNEGO)
@ -1475,11 +1502,35 @@ with a remote host. (Added in 7.17.1)
.IP "--proxy-ntlm"
Tells curl to use HTTP NTLM authentication when communicating with the given
proxy. Use \fI--ntlm\fP for enabling NTLM with a remote host.
.IP "--proxy-pass <phrase>"
(SSL) Same as \fI--pass\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-service-name <servicename>"
This option allows you to change the service name for proxy negotiation.
Examples: --proxy-negotiate proxy-name \fI--proxy-service-name\fP sockd would use
sockd/proxy-name. (Added in 7.43.0).
.IP "--proxy-ssl-allow-beast"
(SSL) Same as \fI--ssl-allow-beast\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-sslv2"
(SSL) Same as \fI--sslv2\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-sslv3"
(SSL) Same as \fI--sslv3\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-tlsauthtype <authtype>"
Same as \fI--tlsauthtype\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-tlspassword <password>"
Same as \fI--tlspassword\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-tlsuser <user>"
Same as \fI--tlsuser\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy-tlsv1"
(SSL) Same as \fI--tlsv1\fP but used in HTTPS proxy context.
(Added in 7.XXX)
.IP "--proxy1.0 <proxyhost[:port]>"
Use the specified HTTP 1.0 proxy. If the port number is not specified, it is
assumed at port 1080.

3
docs/libcurl/curl_easy_getinfo.3
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@ -104,6 +104,9 @@ See \fICURLINFO_REQUEST_SIZE(3)\fP
.IP CURLINFO_SSL_VERIFYRESULT
Certificate verification result.
See \fICURLINFO_SSL_VERIFYRESULT(3)\fP
.IP CURLINFO_PROXY_SSL_VERIFYRESULT
Proxy certificate verification result.
See \fICURLINFO_PROXY_SSL_VERIFYRESULT(3)\fP
.IP CURLINFO_SSL_ENGINES
A list of OpenSSL crypto engines.
See \fICURLINFO_SSL_ENGINES(3)\fP

36
docs/libcurl/curl_easy_setopt.3
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@ -159,10 +159,14 @@ Protocols to allow redirects to. See \fICURLOPT_REDIR_PROTOCOLS(3)\fP
Default protocol. See \fICURLOPT_DEFAULT_PROTOCOL(3)\fP
.IP CURLOPT_PROXY
Proxy to use. See \fICURLOPT_PROXY(3)\fP
.IP CURLOPT_SOCKS_PROXY
Socks proxy to use. See \fICURLOPT_SOCKS_PROXY(3)\fP
.IP CURLOPT_PROXYPORT
Proxy port to use. See \fICURLOPT_PROXYPORT(3)\fP
.IP CURLOPT_PROXYTYPE
Proxy type. See \fICURLOPT_PROXYTYPE(3)\fP
.IP CURLOPT_SOCKS_PROXYTYPE
Socks proxy type. See \fICURLOPT_SOCKS_PROXYTYPE(3)\fP
.IP CURLOPT_NOPROXY
Filter out hosts from proxy use. \fICURLOPT_NOPROXY(3)\fP
.IP CURLOPT_HTTPPROXYTUNNEL
@ -228,10 +232,16 @@ Proxy password. See \fICURLOPT_PROXYPASSWORD(3)\fP
HTTP server authentication methods. See \fICURLOPT_HTTPAUTH(3)\fP
.IP CURLOPT_TLSAUTH_USERNAME
TLS authentication user name. See \fICURLOPT_TLSAUTH_USERNAME(3)\fP
.IP CURLOPT_PROXY_TLSAUTH_USERNAME
Proxy TLS authentication user name. See \fICURLOPT_PROXY_TLSAUTH_USERNAME(3)\fP
.IP CURLOPT_TLSAUTH_PASSWORD
TLS authentication password. See \fICURLOPT_TLSAUTH_PASSWORD(3)\fP
.IP CURLOPT_PROXY_TLSAUTH_PASSWORD
Proxy TLS authentication password. See \fICURLOPT_PROXY_TLSAUTH_PASSWORD(3)\fP
.IP CURLOPT_TLSAUTH_TYPE
TLS authentication methods. See \fICURLOPT_TLSAUTH_TYPE(3)\fP
.IP CURLOPT_PROXY_TLSAUTH_TYPE
Proxy TLS authentication methods. See \fICURLOPT_PROXY_TLSAUTH_TYPE(3)\fP
.IP CURLOPT_PROXYAUTH
HTTP proxy authentication methods. See \fICURLOPT_PROXYAUTH(3)\fP
.IP CURLOPT_SASL_IR
@ -447,14 +457,24 @@ Timeout for waiting for the server's connect back to be accepted. See \fICURLOPT
.SH SSL and SECURITY OPTIONS
.IP CURLOPT_SSLCERT
Client cert. See \fICURLOPT_SSLCERT(3)\fP
.IP CURLOPT_PROXY_SSLCERT
Proxy client cert. See \fICURLOPT_PROXY_SSLCERT(3)\fP
.IP CURLOPT_SSLCERTTYPE
Client cert type. See \fICURLOPT_SSLCERTTYPE(3)\fP
.IP CURLOPT_PROXY_SSLCERTTYPE
Proxy client cert type. See \fICURLOPT_PROXY_SSLCERTTYPE(3)\fP
.IP CURLOPT_SSLKEY
Client key. See \fICURLOPT_SSLKEY(3)\fP
.IP CURLOPT_PROXY_SSLKEY
Proxy client key. See \fICURLOPT_PROXY_SSLKEY(3)\fP
.IP CURLOPT_SSLKEYTYPE
Client key type. See \fICURLOPT_SSLKEYTYPE(3)\fP
.IP CURLOPT_PROXY_SSLKEYTYPE
Proxy client key type. See \fICURLOPT_PROXY_SSLKEYTYPE(3)\fP
.IP CURLOPT_KEYPASSWD
Client key password. See \fICURLOPT_KEYPASSWD(3)\fP
.IP CURLOPT_PROXY_KEYPASSWD
Proxy client key password. See \fICURLOPT_PROXY_KEYPASSWD(3)\fP
.IP CURLOPT_SSL_ENABLE_ALPN
Enable use of ALPN. See \fICURLOPT_SSL_ENABLE_ALPN(3)\fP
.IP CURLOPT_SSL_ENABLE_NPN
@ -467,20 +487,32 @@ Default SSL engine. See \fICURLOPT_SSLENGINE_DEFAULT(3)\fP
Enable TLS False Start. See \fICURLOPT_SSL_FALSESTART(3)\fP
.IP CURLOPT_SSLVERSION
SSL version to use. See \fICURLOPT_SSLVERSION(3)\fP
.IP CURLOPT_PROXY_SSLVERSION
Proxy SSL version to use. See \fICURLOPT_PROXY_SSLVERSION(3)\fP
.IP CURLOPT_SSL_VERIFYHOST
Verify the host name in the SSL certificate. See \fICURLOPT_SSL_VERIFYHOST(3)\fP
.IP CURLOPT_PROXY_SSL_VERIFYHOST
Verify the host name in the proxy SSL certificate. See \fICURLOPT_PROXY_SSL_VERIFYHOST(3)\fP
.IP CURLOPT_SSL_VERIFYPEER
Verify the SSL certificate. See \fICURLOPT_SSL_VERIFYPEER(3)\fP
.IP CURLOPT_PROXY_SSL_VERIFYPEER
Verify the proxy SSL certificate. See \fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP
.IP CURLOPT_SSL_VERIFYSTATUS
Verify the SSL certificate's status. See \fICURLOPT_SSL_VERIFYSTATUS(3)\fP
.IP CURLOPT_CAINFO
CA cert bundle. See \fICURLOPT_CAINFO(3)\fP
.IP CURLOPT_PROXY_CAINFO
Proxy CA cert bundle. See \fICURLOPT_PROXY_CAINFO(3)\fP
.IP CURLOPT_ISSUERCERT
Issuer certificate. See \fICURLOPT_ISSUERCERT(3)\fP
.IP CURLOPT_CAPATH
Path to CA cert bundle. See \fICURLOPT_CAPATH(3)\fP
.IP CURLOPT_PROXY_CAPATH
Path to proxy CA cert bundle. See \fICURLOPT_PROXY_CAPATH(3)\fP
.IP CURLOPT_CRLFILE
Certificate Revocation List. See \fICURLOPT_CRLFILE(3)\fP
.IP CURLOPT_PROXY_CRLFILE
Proxy Certificate Revocation List. See \fICURLOPT_PROXY_CRLFILE(3)\fP
.IP CURLOPT_CERTINFO
Extract certificate info. See \fICURLOPT_CERTINFO(3)\fP
.IP CURLOPT_PINNEDPUBLICKEY
@ -491,10 +523,14 @@ Provide source for entropy random data. See \fICURLOPT_RANDOM_FILE(3)\fP
Identify EGD socket for entropy. See \fICURLOPT_EGDSOCKET(3)\fP
.IP CURLOPT_SSL_CIPHER_LIST
Ciphers to use. See \fICURLOPT_SSL_CIPHER_LIST(3)\fP
.IP CURLOPT_PROXY_SSL_CIPHER_LIST
Proxy ciphers to use. See \fICURLOPT_PROXY_SSL_CIPHER_LIST(3)\fP
.IP CURLOPT_SSL_SESSIONID_CACHE
Disable SSL session-id cache. See \fICURLOPT_SSL_SESSIONID_CACHE(3)\fP
.IP CURLOPT_SSL_OPTIONS
Control SSL behavior. See \fICURLOPT_SSL_OPTIONS(3)\fP
.IP CURLOPT_PROXY_SSL_OPTIONS
Control proxy SSL behavior. See \fICURLOPT_PROXY_SSL_OPTIONS(3)\fP
.IP CURLOPT_KRBLEVEL
Kerberos security level. See \fICURLOPT_KRBLEVEL(3)\fP
.IP CURLOPT_GSSAPI_DELEGATION

44
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@ -0,0 +1,44 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLINFO_PROXY_SSL_VERIFYRESULT 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_getinfo options"
.SH NAME
CURLINFO_PROXY_SSL_VERIFYRESULT \- get the result of the proxy certification verification
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXY_SSL_VERIFYRESULT, long *result);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a long to receive the result of the certification
verification that was requested (using the \fICURLOPT_SSL_VERIFYPEER(3)\fP
option.
.SH PROTOCOLS
All using TLS
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.5
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR curl_easy_getinfo "(3), " curl_easy_setopt "(3), "

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@ -0,0 +1,64 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_CAINFO 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_CAINFO \- path to proxy Certificate Authority (CA) bundle
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAINFO, char *path);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a char * to a zero terminated string naming a file holding one or more
certificates to verify the peer with.
If \fICURLOPT_SSL_VERIFYPEER(3)\fP is zero and you avoid verifying the
server's certificate, \fICURLOPT_CAINFO(3)\fP need not even indicate an
accessible file.
This option is by default set to the system path where libcurl's cacert bundle
is assumed to be stored, as established at build time.
If curl is built against the NSS SSL library, the NSS PEM PKCS#11 module
(libnsspem.so) needs to be available for this option to work properly.
(iOS and macOS only) If curl is built against Secure Transport, then this
option is supported for backward compatibility with other SSL engines, but it
should not be set. If the option is not set, then curl will use the
certificates in the system and user Keychain to verify the peer, which is the
preferred method of verifying the peer's certificate chain.
.SH DEFAULT
Built-in system specific
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
For SSL engines that don't support certificate files the CURLOPT_PROXY_CAINFO option
is ignored. Refer to https://curl.haxx.se/docs/ssl-compared.html
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_CAPATH "(3), "
.BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_SSL_VERIFYHOST "(3), "

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@ -0,0 +1,54 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_CAPATH 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_CAPATH \- specify directory holding proxy CA certificates
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CAPATH, char *capath);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a char * to a zero terminated string naming a directory holding multiple
CA certificates to verify the peer with. If libcurl is built against OpenSSL,
the certificate directory must be prepared using the openssl c_rehash utility.
This makes sense only when used in combination with the
\fICURLOPT_SSL_VERIFYPEER(3)\fP option.
The \fICURLOPT_CAPATH(3)\fP function apparently does not work in Windows due
to some limitation in openssl.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
This option is supported by the OpenSSL, GnuTLS and PolarSSL backends. The NSS
backend provides the option only for backward compatibility.
.SH RETURN VALUE
Returns CURLE_OK if TLS enabled, and CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_CAINFO "(3), "
.BR CURLOPT_STDERR "(3), " CURLOPT_DEBUGFUNCTION "(3), "

61
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@ -0,0 +1,61 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_CRLFILE 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_CRLFILE \- specify a proxy Certificate Revocation List file
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_CRLFILE, char *file);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a char * to a zero terminated string naming a \fIfile\fP with the
concatenation of CRL (in PEM format) to use in the certificate validation that
occurs during the SSL exchange.
When curl is built to use NSS or GnuTLS, there is no way to influence the use
of CRL passed to help in the verification process. When libcurl is built with
OpenSSL support, X509_V_FLAG_CRL_CHECK and X509_V_FLAG_CRL_CHECK_ALL are both
set, requiring CRL check against all the elements of the certificate chain if
a CRL file is passed.
This option makes sense only when used in combination with the
\fICURLOPT_SSL_VERIFYPEER(3)\fP option.
A specific error code (\fICURLE_SSL_CRL_BADFILE\fP) is defined with the
option. It is returned when the SSL exchange fails because the CRL file cannot
be loaded. A failure in certificate verification due to a revocation
information found in the CRL does not trigger this specific error.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS-based protocols
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.51.1
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_SSL_VERIFYHOST "(3), "

46
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@ -0,0 +1,46 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_KEYPASSWD 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_KEYPASSWD \- set passphrase to proxy private key
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_KEYPASSWD, char *pwd);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a zero terminated string as parameter. It will be used as
the password required to use the \fICURLOPT_SSLKEY(3)\fP or
\fICURLOPT_SSH_PRIVATE_KEYFILE(3)\fP private key. You never needed a pass
phrase to load a certificate but you need one to load your private key.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH RETURN VALUE
Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLKEY "(3), " CURLOPT_SSH_PRIVATE_KEYFILE "(3), "

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@ -0,0 +1,56 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSLCERT 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSLCERT \- set SSL proxy client certificate
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLCERT, char *cert);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a zero terminated string as parameter. The string should be
the file name of your client certificate. The default format is "P12" on
Secure Transport and "PEM" on other engines, and can be changed with
\fICURLOPT_SSLCERTTYPE(3)\fP.
With NSS or Secure Transport, this can also be the nickname of the certificate
you wish to authenticate with as it is named in the security database. If you
want to use a file from the current directory, please precede it with "./"
prefix, in order to avoid confusion with a nickname.
When using a client certificate, you most likely also need to provide a
private key with \fICURLOPT_SSLKEY(3)\fP.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLCERTTYPE "(3), " CURLOPT_SSLKEY "(3), "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSLCERTTYPE 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSLCERTTYPE \- specify type of the proxy client SSL certificate
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLCERTTYPE, char *type);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a zero terminated string as parameter. The string should be
the format of your certificate. Supported formats are "PEM" and "DER", except
with Secure Transport. OpenSSL (versions 0.9.3 and later) and Secure Transport
(on iOS 5 or later, or OS X 10.7 or later) also support "P12" for
PKCS#12-encoded files.
.SH DEFAULT
"PEM"
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLCERT "(3), " CURLOPT_SSLKEY "(3), "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSLKEY 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSLKEY \- specify private keyfile for TLS and SSL proxy client cert
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLKEY, char *keyfile);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a zero terminated string as parameter. The string should be
the file name of your private key. The default format is "PEM" and can be
changed with \fICURLOPT_SSLKEYTYPE(3)\fP.
(iOS and Mac OS X only) This option is ignored if curl was built against
Secure Transport. Secure Transport expects the private key to be already
present in the keychain or PKCS#12 file containing the certificate.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLKEYTYPE "(3), " CURLOPT_SSLCERT "(3), "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSLKEYTYPE 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSLKEYTYPE \- set type of the proxy private key file
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLKEYTYPE, char *type);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a zero terminated string as parameter. The string should be
the format of your private key. Supported formats are "PEM", "DER" and "ENG".
The format "ENG" enables you to load the private key from a crypto engine. In
this case \fICURLOPT_SSLKEY(3)\fP is used as an identifier passed to the
engine. You have to set the crypto engine with \fICURLOPT_SSLENGINE(3)\fP.
\&"DER" format key file currently does not work because of a bug in OpenSSL.
.SH DEFAULT
"PEM"
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLKEY "(3), " CURLOPT_SSLCERT "(3), "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSLVERSION 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSLVERSION \- set proxy preferred TLS/SSL version
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSLVERSION, long version);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a long as parameter to control which version of SSL/TLS to attempt to
use.
Use one of the available defines for this purpose. The available options are:
.RS
.IP CURL_SSLVERSION_DEFAULT
The default action. This will attempt to figure out the remote SSL protocol
version.
.IP CURL_SSLVERSION_TLSv1
TLSv1.x
.IP CURL_SSLVERSION_SSLv2
SSLv2
.IP CURL_SSLVERSION_SSLv3
SSLv3
.IP CURL_SSLVERSION_TLSv1_0
TLSv1.0 (Added in 7.34.0)
.IP CURL_SSLVERSION_TLSv1_1
TLSv1.1 (Added in 7.34.0)
.IP CURL_SSLVERSION_TLSv1_2
TLSv1.2 (Added in 7.34.0)
.IP CURL_SSLVERSION_TLSv1_3
TLSv1.3 (Added in 7.51.1)
.RE
.SH DEFAULT
CURL_SSLVERSION_DEFAULT
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* ask libcurl to use TLS version 1.0 or later */
curl_easy_setopt(curl, CURLOPT_PROXY_SSLVERSION, CURL_SSLVERSION_TLSv1);
/* Perform the request */
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
SSLv2 is disabled by default since 7.18.1. Other SSL versions availability may
vary depending on which backend libcurl has been built to use.
SSLv3 is disabled by default since 7.39.0.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_USE_SSL "(3), " CURLOPT_HTTP_VERSION "(3), "
.BR CURLOPT_IPRESOLVE "(3) "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSL_CIPHER_LIST 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSL_CIPHER_LIST \- specify ciphers to use for proxy TLS
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_CIPHER_LIST, char *list);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a char *, pointing to a zero terminated string holding the list of
ciphers to use for the SSL connection. The list must be syntactically correct,
it consists of one or more cipher strings separated by colons. Commas or
spaces are also acceptable separators but colons are normally used, \&!, \&-
and \&+ can be used as operators.
For OpenSSL and GnuTLS valid examples of cipher lists include 'RC4-SHA',
\'SHA1+DES\', 'TLSv1' and 'DEFAULT'. The default list is normally set when you
compile OpenSSL.
You'll find more details about cipher lists on this URL:
https://www.openssl.org/docs/apps/ciphers.html
For NSS, valid examples of cipher lists include 'rsa_rc4_128_md5',
\'rsa_aes_128_sha\', etc. With NSS you don't add/remove ciphers. If one uses
this option then all known ciphers are disabled and only those passed in are
enabled.
You'll find more details about the NSS cipher lists on this URL:
http://git.fedorahosted.org/cgit/mod_nss.git/plain/docs/mod_nss.html#Directives
.SH DEFAULT
NULL, use internal default
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
TODO
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_SSLVERSION "(3), " CURLOPT_USE_SSL "(3), "

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@ -0,0 +1,62 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSL_OPTIONS 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSL_OPTIONS \- set proxy SSL behavior options
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_OPTIONS, long bitmask);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a long with a bitmask to tell libcurl about specific SSL behaviors.
\fICURLSSLOPT_ALLOW_BEAST\fP tells libcurl to not attempt to use any
workarounds for a security flaw in the SSL3 and TLS1.0 protocols. If this
option isn't used or this bit is set to 0, the SSL layer libcurl uses may use a
work-around for this flaw although it might cause interoperability problems
with some (older) SSL implementations. WARNING: avoiding this work-around
lessens the security, and by setting this option to 1 you ask for exactly that.
This option is only supported for DarwinSSL, NSS and OpenSSL.
Added in 7.44.0:
\fICURLSSLOPT_NO_REVOKE\fP tells libcurl to disable certificate revocation
checks for those SSL backends where such behavior is present. \fBCurrently this
option is only supported for WinSSL (the native Windows SSL library), with an
exception in the case of Windows' Untrusted Publishers blacklist which it seems
can't be bypassed.\fP This option may have broader support to accommodate other
SSL backends in the future.
https://curl.haxx.se/docs/ssl-compared.html
.SH DEFAULT
0
.SH PROTOCOLS
All TLS-based protocols
.SH EXAMPLE
TODO
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_SSLVERSION "(3), " CURLOPT_SSL_CIPHER_LIST "(3), "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSL_VERIFYHOST 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSL_VERIFYHOST \- verify the proxy certificate's name against host
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_VERIFYHOST, long verify);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a long as parameter specifying what to \fIverify\fP.
This option determines whether libcurl verifies that the server cert is for
the server it is known as.
When negotiating TLS and SSL connections, the server sends a certificate
indicating its identity.
When \fICURLOPT_SSL_VERIFYHOST(3)\fP is 2, that certificate must indicate that
the server is the server to which you meant to connect, or the connection
fails. Simply put, it means it has to have the same name in the certificate as
is in the URL you operate against.
Curl considers the server the intended one when the Common Name field or a
Subject Alternate Name field in the certificate matches the host name in the
URL to which you told Curl to connect.
When the \fIverify\fP value is 1, \fIcurl_easy_setopt\fP will return an error
and the option value will not be changed. It was previously (in 7.28.0 and
earlier) a debug option of some sorts, but it is no longer supported due to
frequently leading to programmer mistakes. Future versions will stop returning
an error for 1 and just treat 1 and 2 the same.
When the \fIverify\fP value is 0, the connection succeeds regardless of the
names in the certificate. Use that ability with caution!
The default value for this option is 2.
This option controls checking the server's certificate's claimed identity.
The server could be lying. To control lying, see
\fICURLOPT_SSL_VERIFYPEER(3)\fP. If libcurl is built against NSS and
\fICURLOPT_SSL_VERIFYPEER(3)\fP is zero, \fICURLOPT_SSL_VERIFYHOST(3)\fP is
also set to zero and cannot be overridden.
.SH DEFAULT
2
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Set the default value: strict name check please */
curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYHOST, 2L);
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if TLS is supported, and CURLE_UNKNOWN_OPTION if not.
If 1 is set as argument, \fICURLE_BAD_FUNCTION_ARGUMENT\fP is returned.
.SH "SEE ALSO"
.BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_CAINFO "(3), "

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.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_SSL_VERIFYPEER 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_SSL_VERIFYPEER \- verify the proxy peer's SSL certificate
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_SSL_VERIFYPEER, long verify);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a long as parameter to enable or disable.
This option determines whether curl verifies the authenticity of the peer's
certificate. A value of 1 means curl verifies; 0 (zero) means it doesn't.
When negotiating a TLS or SSL connection, the server sends a certificate
indicating its identity. Curl verifies whether the certificate is authentic,
i.e. that you can trust that the server is who the certificate says it is.
This trust is based on a chain of digital signatures, rooted in certification
authority (CA) certificates you supply. curl uses a default bundle of CA
certificates (the path for that is determined at build time) and you can
specify alternate certificates with the \fICURLOPT_CAINFO(3)\fP option or the
\fICURLOPT_CAPATH(3)\fP option.
When \fICURLOPT_SSL_VERIFYPEER(3)\fP is enabled, and the verification fails to
prove that the certificate is authentic, the connection fails. When the
option is zero, the peer certificate verification succeeds regardless.
Authenticating the certificate is not enough to be sure about the server. You
typically also want to ensure that the server is the server you mean to be
talking to. Use \fICURLOPT_SSL_VERIFYHOST(3)\fP for that. The check that the
host name in the certificate is valid for the host name you're connecting to
is done independently of the \fICURLOPT_SSL_VERIFYPEER(3)\fP option.
WARNING: disabling verification of the certificate allows bad guys to
man-in-the-middle the communication without you knowing it. Disabling
verification makes the communication insecure. Just having encryption on a
transfer is not enough as you cannot be sure that you are communicating with
the correct end-point.
.SH DEFAULT
By default, curl assumes a value of 1.
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Set the default value: strict certificate check please */
curl_easy_setopt(curl, CURLOPT_PROXY_SSL_VERIFYPEER, 1L);
curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
If built TLS enabled.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_SSL_VERIFYHOST "(3), "

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@ -0,0 +1,48 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_TLSAUTH_PASSWORD 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_TLSAUTH_PASSWORD \- password to use for proxy TLS authentication
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLSAUTH_PASSWORD, char *pwd);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a char * as parameter, which should point to the zero terminated password
to use for the TLS authentication method specified with the
\fICURLOPT_TLSAUTH_TYPE(3)\fP option. Requires that the
\fICURLOPT_TLSAUTH_USERNAME(3)\fP option also be set.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS-based protocols
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.21.4
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_TLSAUTH_TYPE "(3), " CURLOPT_TLSAUTH_USERNAME "(3), "

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@ -0,0 +1,53 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_TLSAUTH_TYPE 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_TLSAUTH_TYPE \- set proxy TLS authentication methods
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLSAUTH_TYPE, char *type);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a pointer to a zero terminated string as parameter. The string
should be the method of the TLS authentication. Supported method is "SRP".
.IP SRP
TLS-SRP authentication. Secure Remote Password authentication for TLS is
defined in RFC5054 and provides mutual authentication if both sides have a
shared secret. To use TLS-SRP, you must also set the
\fICURLOPT_TLSAUTH_USERNAME(3)\fP and \fICURLOPT_TLSAUTH_PASSWORD(3)\fP
options.
.SH DEFAULT
blank
.SH PROTOCOLS
All TLS-based protocols
.SH EXAMPLE
TODO
.SH AVAILABILITY
You need to build libcurl with GnuTLS or OpenSSL with TLS-SRP support for this
to work.
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_TLSAUTH_USERNAME "(3), " CURLOPT_TLSAUTH_PASSWORD "(3), "

46
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@ -0,0 +1,46 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PROXY_TLSAUTH_USERNAME 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_PROXY_TLSAUTH_USERNAME \- user name to use for proxy TLS authentication
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TLSAUTH_USERNAME, char *user);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a char * as parameter, which should point to the zero terminated username
to use for the TLS authentication method specified with the
\fICURLOPT_TLSAUTH_TYPE(3)\fP option. Requires that the
\fICURLOPT_TLSAUTH_PASSWORD(3)\fP option also be set.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS-based protocols
.SH EXAMPLE
TODO
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_TLSAUTH_TYPE "(3), " CURLOPT_TLSAUTH_PASSWORD "(3), "

88
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@ -0,0 +1,88 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_SOCKS_PROXY 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_SOCKS_PROXY \- set socks proxy to use
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKS_PROXY, char *proxy);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Set the \fIproxy\fP to use for the upcoming request. The parameter should be a
char * to a zero terminated string holding the host name or dotted numerical
IP address. A numerical IPv6 address must be written within [brackets].
To specify port number in this string, append :[port] to the end of the host
name. The proxy's port number may optionally be specified with the separate
option \fICURLOPT_PROXYPORT(3)\fP. If not specified, libcurl will default to
using port 1080 for proxies.
The proxy string may be prefixed with [scheme]:// to specify which kind of
proxy is used. Use socks4://, socks4a://, socks5:// or socks5h:// (the last
one to enable socks5 and asking the proxy to do the resolving, also known as
\fICURLPROXY_SOCKS5_HOSTNAME\fP type) to request the specific SOCKS version to
be used. No scheme specified or http://, will be treated as HTTP proxies.
Without a scheme prefix, \fICURLOPT_PROXYTYPE(3)\fP can be used to specify
which kind of proxy the string identifies.
When you tell the library to use a HTTP proxy, libcurl will transparently
convert operations to HTTP even if you specify an FTP URL etc. This may have
an impact on what other features of the library you can use, such as
\fICURLOPT_QUOTE(3)\fP and similar FTP specifics that don't work unless you
tunnel through the HTTP proxy. Such tunneling is activated with
\fICURLOPT_HTTPPROXYTUNNEL(3)\fP.
libcurl respects the environment variables \fBhttp_proxy\fP, \fBftp_proxy\fP,
\fBall_proxy\fP etc, if any of those are set. The \fICURLOPT_PROXY(3)\fP
option does however override any possibly set environment variables.
Setting the proxy string to "" (an empty string) will explicitly disable the
use of a proxy, even if there is an environment variable set for it.
A proxy host string can also include protocol scheme (http://) and embedded
user + password.
.SH DEFAULT
Default is NULL, meaning no proxy is used.
When you set a host name to use, do not assume that there's any particular
single port number used widely for proxies. Specify it!
.SH PROTOCOLS
All except file://. Note that some protocols don't do very well over proxy.
.SH EXAMPLE
TODO
.SH AVAILABILITY
Since 7.14.1 the proxy environment variable names can include the protocol
scheme.
Since 7.21.7 the proxy string supports the socks protocols as "schemes".
Since 7.50.2, unsupported schemes in proxy strings cause libcurl to return
error.
.SH RETURN VALUE
Returns CURLE_OK if proxies are supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.
.SH "SEE ALSO"
.BR CURLOPT_PROXYPORT "(3), " CURLOPT_HTTPPROXYTUNNEL "(3), "
.BR CURLOPT_PROXYTYPE "(3)"

55
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@ -0,0 +1,55 @@
.\" **************************************************************************
.\" * _ _ ____ _
.\" * Project ___| | | | _ \| |
.\" * / __| | | | |_) | |
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2016, 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 https://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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_SOCKS_PROXYTYPE 3 "16 Nov 2016" "libcurl 7.51.1" "curl_easy_setopt options"
.SH NAME
CURLOPT_SOCKS_PROXYTYPE \- socks proxy protocol type
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SOCKS_PROXYTYPE, long type);
.SH DESCRIPTION
TODO: Make this text specific to HTTPS proxy. (Added in 7.XXX)
Pass a long with this option to set type of the proxy. Available options for
this are \fICURLPROXY_HTTP\fP, \fICURLPROXY_HTTP_1_0\fP
\fICURLPROXY_SOCKS4\fP, \fICURLPROXY_SOCKS5\fP, \fICURLPROXY_SOCKS4A\fP and
\fICURLPROXY_SOCKS5_HOSTNAME\fP. The HTTP type is default.
If you set \fICURLOPT_PROXYTYPE(3)\fP to \fICURLPROXY_HTTP_1_0\fP, it will
only affect how libcurl speaks to a proxy when CONNECT is used. The HTTP
version used for "regular" HTTP requests is instead controlled with
\fICURLOPT_HTTP_VERSION(3)\fP.
Often it is more convenient to specify the proxy type with the scheme part of
the \fICURLOPT_PROXY(3)\fP string.
.SH DEFAULT
CURLPROXY_HTTP
.SH PROTOCOLS
Most
.SH EXAMPLE
TODO
.SH AVAILABILITY
Always
.SH RETURN VALUE
Returns CURLE_OK
.SH "SEE ALSO"
.BR CURLOPT_PROXY "(3), " CURLOPT_PROXYPORT "(3), "

19
docs/libcurl/opts/Makefile.am
View file

@ -49,6 +49,7 @@ man_MANS = \
CURLINFO_PRIMARY_IP.3 \
CURLINFO_PRIMARY_PORT.3 \
CURLINFO_PRIVATE.3 \
CURLINFO_PROXY_SSL_VERIFYRESULT.3 \
CURLINFO_PROXYAUTH_AVAIL.3 \
CURLINFO_REDIRECT_COUNT.3 \
CURLINFO_REDIRECT_TIME.3 \
@ -223,6 +224,24 @@ man_MANS = \
CURLOPT_PROXYUSERPWD.3 \
CURLOPT_PROXY_SERVICE_NAME.3 \
CURLOPT_PROXY_TRANSFER_MODE.3 \
CURLOPT_PROXY_CAINFO.3 \
CURLOPT_PROXY_CAPATH.3 \
CURLOPT_PROXY_CRLFILE.3 \
CURLOPT_PROXY_KEYPASSWD.3 \
CURLOPT_PROXY_SSLCERT.3 \
CURLOPT_PROXY_SSLCERTTYPE.3 \
CURLOPT_PROXY_SSLKEY.3 \
CURLOPT_PROXY_SSLKEYTYPE.3 \
CURLOPT_PROXY_SSLVERSION.3 \
CURLOPT_PROXY_SSL_CIPHER_LIST.3 \
CURLOPT_PROXY_SSL_OPTIONS.3 \
CURLOPT_PROXY_SSL_VERIFYHOST.3 \
CURLOPT_PROXY_SSL_VERIFYPEER.3 \
CURLOPT_PROXY_TLSAUTH_PASSWORD.3 \
CURLOPT_PROXY_TLSAUTH_TYPE.3 \
CURLOPT_PROXY_TLSAUTH_USERNAME.3 \
CURLOPT_SOCKS_PROXY.3 \
CURLOPT_SOCKS_PROXYTYPE.3 \
CURLOPT_PUT.3 \
CURLOPT_QUOTE.3 \
CURLOPT_RANDOM_FILE.3 \

20
docs/libcurl/symbols-in-versions
View file

@ -240,6 +240,7 @@ CURLINFO_PRIMARY_IP 7.19.0
CURLINFO_PRIMARY_PORT 7.21.0
CURLINFO_PRIVATE 7.10.3
CURLINFO_PROXYAUTH_AVAIL 7.10.8
CURLINFO_PROXY_SSL_VERIFYRESULT 7.51.1
CURLINFO_REDIRECT_COUNT 7.9.7
CURLINFO_REDIRECT_TIME 7.9.7
CURLINFO_REDIRECT_URL 7.18.2
@ -468,7 +469,23 @@ CURLOPT_PROXYPORT 7.1
CURLOPT_PROXYTYPE 7.10
CURLOPT_PROXYUSERNAME 7.19.1
CURLOPT_PROXYUSERPWD 7.1
CURLOPT_PROXY_CAINFO 7.51.1
CURLOPT_PROXY_CAPATH 7.51.1
CURLOPT_PROXY_CRLFILE 7.51.1
CURLOPT_PROXY_KEYPASSWD 7.51.1
CURLOPT_PROXY_SERVICE_NAME 7.43.0
CURLOPT_PROXY_SSLCERT 7.51.1
CURLOPT_PROXY_SSLCERTTYPE 7.51.1
CURLOPT_PROXY_SSLKEY 7.51.1
CURLOPT_PROXY_SSLKEYTYPE 7.51.1
CURLOPT_PROXY_SSLVERSION 7.51.1
CURLOPT_PROXY_SSL_CIPHER_LIST 7.51.1
CURLOPT_PROXY_SSL_OPTIONS 7.51.1
CURLOPT_PROXY_SSL_VERIFYHOST 7.51.1
CURLOPT_PROXY_SSL_VERIFYPEER 7.51.1
CURLOPT_PROXY_TLSAUTH_PASSWORD 7.51.1
CURLOPT_PROXY_TLSAUTH_TYPE 7.51.1
CURLOPT_PROXY_TLSAUTH_USERNAME 7.51.1
CURLOPT_PROXY_TRANSFER_MODE 7.18.0
CURLOPT_PUT 7.1
CURLOPT_QUOTE 7.1
@ -498,6 +515,8 @@ CURLOPT_SOCKOPTDATA 7.16.0
CURLOPT_SOCKOPTFUNCTION 7.16.0
CURLOPT_SOCKS5_GSSAPI_NEC 7.19.4
CURLOPT_SOCKS5_GSSAPI_SERVICE 7.19.4 7.49.0
CURLOPT_SOCKS_PROXY 7.51.1
CURLOPT_SOCKS_PROXYTYPE 7.51.1
CURLOPT_SOURCE_HOST 7.12.1 - 7.15.5
CURLOPT_SOURCE_PATH 7.12.1 - 7.15.5
CURLOPT_SOURCE_PORT 7.12.1 - 7.15.5
@ -611,6 +630,7 @@ CURLPROTO_TELNET 7.19.4
CURLPROTO_TFTP 7.19.4
CURLPROXY_HTTP 7.10
CURLPROXY_HTTP_1_0 7.19.4
CURLPROXY_HTTPS 7.51.1
CURLPROXY_SOCKS4 7.10
CURLPROXY_SOCKS4A 7.18.0
CURLPROXY_SOCKS5 7.10