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80 lines
3.3 KiB
Groff
80 lines
3.3 KiB
Groff
.\" **************************************************************************
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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) 1998 - 2021, 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.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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.\" **************************************************************************
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.\"
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.TH CURLOPT_ISSUERCERT_BLOB 3 "24 Jun 2020" "libcurl 7.71.0" "curl_easy_setopt options"
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.SH NAME
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CURLOPT_ISSUERCERT_BLOB \- issuer SSL certificate from memory blob
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.SH SYNOPSIS
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ISSUERCERT_BLOB, struct curl_blob *stblob);
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.SH DESCRIPTION
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Pass a pointer to a curl_blob structure, which contains information (pointer
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and size) about a memory block with binary data of a CA certificate in PEM
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format. If the option is set, an additional check against the peer certificate
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is performed to verify the issuer is indeed the one associated with the
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certificate provided by the option. This additional check is useful in
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multi-level PKI where one needs to enforce that the peer certificate is from a
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specific branch of the tree.
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This option should be used in combination with the
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\fICURLOPT_SSL_VERIFYPEER(3)\fP option. Otherwise, the result of the check is
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not considered as failure.
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A specific error code (CURLE_SSL_ISSUER_ERROR) is defined with the option,
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which is returned if the setup of the SSL/TLS session has failed due to a
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mismatch with the issuer of peer certificate (\fICURLOPT_SSL_VERIFYPEER(3)\fP
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has to be set too for the check to fail).
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If the blob is initialized with the flags member of struct curl_blob set to
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CURL_BLOB_COPY, the application does not have to keep the buffer around after
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setting this.
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This option is an alternative to \fICURLOPT_ISSUERCERT(3)\fP which instead
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expects a file name as input.
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.SH DEFAULT
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NULL
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.SH PROTOCOLS
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All TLS-based protocols
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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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struct curl_blob blob;
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
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blob.data = certificateData;
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blob.len = filesize;
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blob.flags = CURL_BLOB_COPY;
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curl_easy_setopt(curl, CURLOPT_ISSUERCERT_BLOB, &blob);
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ret = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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.fi
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.SH AVAILABILITY
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Added in 7.71.0. This option is supported by the OpenSSL backends.
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.SH RETURN VALUE
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Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
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CURLE_OUT_OF_MEMORY if there was insufficient heap space.
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.SH "SEE ALSO"
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.BR CURLOPT_ISSUERCERT "(3),"
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.BR CURLOPT_CRLFILE "(3), " CURLOPT_SSL_VERIFYPEER "(3), "
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