109 lines
4.3 KiB
Groff
109 lines
4.3 KiB
Groff
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.\" **************************************************************************
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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) 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 https://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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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_AWS_SIGV4 3 "03 Jun 2020" libcurl libcurl
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.SH NAME
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CURLOPT_AWS_SIGV4 \- V4 signature
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_AWS_SIGV4, char *param);
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.fi
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.SH DESCRIPTION
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Provides AWS V4 signature authentication on HTTP(S) header.
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.PP
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Pass a char * that is the collection of specific arguments are used for
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creating outgoing authentication headers. The format of the \fIparam\fP
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option is:
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.IP provider1[:provider2[:region[:service]]]
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.IP provider1,\ provider2
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The providers arguments are used for generating some authentication parameters
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such as "Algorithm", "date", "request type" and "signed headers".
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.IP region
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The argument is a geographic area of a resources collection.
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It is extracted from the host name specified in the URL if omitted.
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.IP service
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The argument is a function provided by a cloud.
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It is extracted from the host name specified in the URL if omitted.
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.PP
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NOTE: This call set \fICURLOPT_HTTPAUTH(3)\fP to CURLAUTH_AWS_SIGV4.
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Calling \fICURLOPT_HTTPAUTH(3)\fP with CURLAUTH_AWS_SIGV4 is the same
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as calling this with \fB"aws:amz"\fP in parameter.
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.PP
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Example with "Test:Try", when curl uses the algorithm, it generates
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\fB"TEST-HMAC-SHA256"\fP for "Algorithm", \fB"x-try-date"\fP and
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\fB"X-Try-Date"\fP for "date", \fB"test4_request"\fP for "request type",
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\fB"SignedHeaders=content-type;host;x-try-date"\fP for "signed headers"
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.PP
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If you use just "test", instead of "test:try", test is used for every
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generated string.
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.SH DEFAULT
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By default, the value of this parameter is NULL.
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Calling \fICURLOPT_HTTPAUTH(3)\fP with CURLAUTH_AWS_SIGV4 is the same
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as calling this with \fB"aws:amz"\fP in parameter.
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.SH PROTOCOLS
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HTTP
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.SH EXAMPLE
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.nf
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL,
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"https://service.region.example.com/uri");
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curl_easy_setopt(c, CURLOPT_AWS_SIGV4, "provider1:provider2");
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/* service and region can also be set in CURLOPT_AWS_SIGV4 */
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/uri");
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curl_easy_setopt(c, CURLOPT_AWS_SIGV4,
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"provider1:provider2:region:service");
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curl_easy_setopt(c, CURLOPT_USERPWD, "MY_ACCESS_KEY:MY_SECRET_KEY");
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curl_easy_perform(curl);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.75.0
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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.SH NOTES
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This option overrides the other auth types you might have set in
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\fICURLOPT_HTTPAUTH(3)\fP which should be highlighted as this makes this auth
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method special. This method cannot be combined with other auth types.
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.PP
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A sha256 checksum of the request payload is used as input to the signature
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calculation. For POST requests, this is a checksum of the provided
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\fICURLOPT_POSTFIELDS(3)\fP. Otherwise, it's the checksum of an empty buffer.
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For requests like PUT, you can provide your own checksum in an HTTP header named
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\fBx-provider2-content-sha256\fP.
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.PP
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For \fBaws:s3\fP, a \fBx-amz-content-sha256\fP header is added to every request
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if not already present. For s3 requests with unknown payload, this header takes
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the special value "UNSIGNED-PAYLOAD".
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.SH "SEE ALSO"
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.BR CURLOPT_HEADEROPT (3),
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.BR CURLOPT_HTTPAUTH (3),
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.BR CURLOPT_HTTPHEADER (3),
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.BR CURLOPT_PROXYAUTH (3)
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