Return to CURLOPT_PROXY_PINNEDPUBLICKEY.3 CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / docs / libcurl / opts

Annotation of embedaddon/curl/docs/libcurl/opts/CURLOPT_PROXY_PINNEDPUBLICKEY.3, revision 1.1

1.1     ! misho       1: .\" **************************************************************************
        !             2: .\" *                                  _   _ ____  _
        !             3: .\" *  Project                     ___| | | |  _ \| |
        !             4: .\" *                             / __| | | | |_) | |
        !             5: .\" *                            | (__| |_| |  _ <| |___
        !             6: .\" *                             \___|\___/|_| \_\_____|
        !             7: .\" *
        !             8: .\" * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
        !             9: .\" *
        !            10: .\" * This software is licensed as described in the file COPYING, which
        !            11: .\" * you should have received as part of this distribution. The terms
        !            12: .\" * are also available at https://curl.haxx.se/docs/copyright.html.
        !            13: .\" *
        !            14: .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
        !            15: .\" * copies of the Software, and permit persons to whom the Software is
        !            16: .\" * furnished to do so, under the terms of the COPYING file.
        !            17: .\" *
        !            18: .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
        !            19: .\" * KIND, either express or implied.
        !            20: .\" *
        !            21: .\" **************************************************************************
        !            22: .\"
        !            23: .TH CURLOPT_PROXY_PINNEDPUBLICKEY 3 "May 15, 2019" "libcurl 7.70.0" "curl_easy_setopt options"
        !            24: 
        !            25: .SH NAME
        !            26: CURLOPT_PROXY_PINNEDPUBLICKEY \- set pinned public key for https proxy
        !            27: .SH SYNOPSIS
        !            28: #include <curl/curl.h>
        !            29: 
        !            30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_PINNEDPUBLICKEY, char *pinnedpubkey);
        !            31: .SH DESCRIPTION
        !            32: Pass a pointer to a zero terminated string as parameter. The string can be the
        !            33: file name of your pinned public key. The file format expected is "PEM" or "DER".
        !            34: The string can also be any number of base64 encoded sha256 hashes preceded by
        !            35: "sha256//" and separated by ";"
        !            36: 
        !            37: When negotiating a TLS or SSL connection, the https proxy sends a certificate
        !            38: indicating its identity. A public key is extracted from this certificate and
        !            39: if it does not exactly match the public key provided to this option, curl will
        !            40: abort the connection before sending or receiving any data.
        !            41: 
        !            42: On mismatch, \fICURLE_SSL_PINNEDPUBKEYNOTMATCH\fP is returned.
        !            43: 
        !            44: The application does not have to keep the string around after setting this
        !            45: option.
        !            46: .SH DEFAULT
        !            47: NULL
        !            48: .SH PROTOCOLS
        !            49: All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
        !            50: .SH EXAMPLE
        !            51: .nf
        !            52: CURL *curl = curl_easy_init();
        !            53: if(curl) {
        !            54:   curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
        !            55:   curl_easy_setopt(curl, CURLOPT_PROXY, "https://proxy:443");
        !            56:   curl_easy_setopt(curl, CURLOPT_PROXY_PINNEDPUBLICKEY,
        !            57:   "sha256//YhKJKSzoTt2b5FP18fvpHo7fJYqQCjAa3HWY3tvRMwE=;sha256//t62CeU2tQiqkexU74Gxa2eg7fRbEgoChTociMee9wno=");
        !            58: 
        !            59:   /* Perform the request */
        !            60:   curl_easy_perform(curl);
        !            61: }
        !            62: .fi
        !            63: .SH PUBLIC KEY EXTRACTION
        !            64: If you do not have the https proxy server's public key file you can extract it
        !            65: from the https proxy server's certificate.
        !            66: .nf
        !            67: # retrieve the server's certificate if you don't already have it
        !            68: #
        !            69: # be sure to examine the certificate to see if it is what you expected
        !            70: #
        !            71: # Windows-specific:
        !            72: # - Use NUL instead of /dev/null.
        !            73: # - OpenSSL may wait for input instead of disconnecting. Hit enter.
        !            74: # - If you don't have sed, then just copy the certificate into a file:
        !            75: #   Lines from -----BEGIN CERTIFICATE----- to -----END CERTIFICATE-----.
        !            76: #
        !            77: openssl s_client -servername www.example.com -connect www.example.com:443 < /dev/null | sed -n "/-----BEGIN/,/-----END/p" > www.example.com.pem
        !            78: 
        !            79: # extract public key in pem format from certificate
        !            80: openssl x509 -in www.example.com.pem -pubkey -noout > www.example.com.pubkey.pem
        !            81: 
        !            82: # convert public key from pem to der
        !            83: openssl asn1parse -noout -inform pem -in www.example.com.pubkey.pem -out www.example.com.pubkey.der
        !            84: 
        !            85: # sha256 hash and base64 encode der to string for use
        !            86: openssl dgst -sha256 -binary www.example.com.pubkey.der | openssl base64
        !            87: .fi
        !            88: The public key in PEM format contains a header, base64 data and a
        !            89: footer:
        !            90: .nf
        !            91: -----BEGIN PUBLIC KEY-----
        !            92: [BASE 64 DATA]
        !            93: -----END PUBLIC KEY-----
        !            94: .fi
        !            95: .SH AVAILABILITY
        !            96: PEM/DER support:
        !            97: 
        !            98:   7.52.0: GSKit, GnuTLS, NSS, OpenSSL, mbedtls, wolfSSL
        !            99: 
        !           100: sha256 support:
        !           101: 
        !           102:   7.52.0: GnuTLS, NSS, OpenSSL, mbedtls, wolfSSL
        !           103: 
        !           104: Other SSL backends not supported.
        !           105: .SH RETURN VALUE
        !           106: Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or
        !           107: CURLE_OUT_OF_MEMORY if there was insufficient heap space.
        !           108: .SH "SEE ALSO"
        !           109: .BR CURLOPT_PROXY_SSL_VERIFYPEER "(3), "
        !           110: .BR CURLOPT_PROXY_SSL_VERIFYHOST "(3), "
        !           111: .BR CURLOPT_PROXY_CAINFO "(3), "
        !           112: .BR CURLOPT_PROXY_CAPATH "(3), "