1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
.\" **************************************************************************
.\" * _ _ ____ _
.\" * 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.
.\" *
.\" **************************************************************************
.\"
.TH CURLOPT_PINNEDPUBLICKEY 3 "27 Aug 2014" "libcurl 7.38.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_PINNEDPUBLICKEY \- set pinned public key
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PINNEDPUBLICKEY, char *pinnedpubkey);
.SH DESCRIPTION
Pass a pointer to a zero terminated string as parameter. The string should be
the file name of your pinned public key. The format expected is "PEM" or "DER".
When negotiating a TLS or SSL connection, the server sends a certificate
indicating its identity. A public key is extracted from this certificate and
if it does not exactly match the public key provided to this option, curl will
abort the connection before sending or receiving any data.
.SH DEFAULT
NULL
.SH PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3, SMTPS etc.
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_PINNEDPUBLICKEY, "/etc/publickey.der");
/* Perform the request */
curl_easy_perform(curl);
}
.fi
.SH PUBLIC KEY EXTRACTION
If you do not have the server's public key file you can extract it from the
server's certificate.
.nf
openssl x509 -in www.test.com.pem -pubkey -noout > www.test.com.pubkey.pem
.fi
The public key is output in PEM format and contains a header, base64 data and a
footer:
.nf
-----BEGIN PUBLIC KEY-----
[BASE 64 DATA]
-----END PUBLIC KEY-----
.fi
.SH AVAILABILITY
Added in 7.39.0 for OpenSSL, GnuTLS and GSKit. Added in 7.43.0 for
NSS and wolfSSL/CyaSSL. Other SSL backends not supported.
.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_SSL_VERIFYPEER "(3), "
.BR CURLOPT_SSL_VERIFYHOST "(3), "
.BR CURLOPT_CAINFO "(3), "
.BR CURLOPT_CAPATH "(3), "
|
