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comparison mupdf-source/thirdparty/curl/docs/libcurl/opts/CURLOPT_CRLFILE.3 @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 .\" **************************************************************************
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8 .\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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10 .\" * This software is licensed as described in the file COPYING, which
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23 .TH CURLOPT_CRLFILE 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
24 .SH NAME
25 CURLOPT_CRLFILE \- specify a Certificate Revocation List file
26 .SH SYNOPSIS
27 #include <curl/curl.h>
28
29 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CRLFILE, char *file);
30 .SH DESCRIPTION
31 Pass a char * to a zero terminated string naming a \fIfile\fP with the
32 concatenation of CRL (in PEM format) to use in the certificate validation that
33 occurs during the SSL exchange.
34
35 When curl is built to use NSS or GnuTLS, there is no way to influence the use
36 of CRL passed to help in the verification process. When libcurl is built with
37 OpenSSL support, X509_V_FLAG_CRL_CHECK and X509_V_FLAG_CRL_CHECK_ALL are both
38 set, requiring CRL check against all the elements of the certificate chain if
39 a CRL file is passed.
40
41 This option makes sense only when used in combination with the
42 \fICURLOPT_SSL_VERIFYPEER(3)\fP option.
43
44 A specific error code (\fICURLE_SSL_CRL_BADFILE\fP) is defined with the
45 option. It is returned when the SSL exchange fails because the CRL file cannot
46 be loaded. A failure in certificate verification due to a revocation
47 information found in the CRL does not trigger this specific error.
48
49 The application does not have to keep the string around after setting this
50 option.
51 .SH DEFAULT
52 NULL
53 .SH PROTOCOLS
54 All TLS-based protocols
55 .SH EXAMPLE
56 .nf
57 CURL *curl = curl_easy_init();
58 if(curl) {
59 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
60 curl_easy_setopt(curl, CURLOPT_CRLFILE, "/etc/certs/crl.pem");
61 ret = curl_easy_perform(curl);
62 curl_easy_cleanup(curl);
63 }
64 .fi
65 .SH AVAILABILITY
66 Added in 7.19.0
67 .SH RETURN VALUE
68 Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
69 CURLE_OUT_OF_MEMORY if there was insufficient heap space.
70 .SH "SEE ALSO"
71 .BR CURLOPT_SSL_VERIFYPEER "(3), " CURLOPT_SSL_VERIFYHOST "(3), "
72 .BR CURLOPT_PROXY_CRLFILE "(3), "