CURLOPT_CRLFILE - Certificate Revocation List file
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CRLFILE, char *file);
CURLOPT_CRLFILE(3) curl_easy_setopt options CURLOPT_CRLFILE(3)
NAME
CURLOPT_CRLFILE - Certificate Revocation List file
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CRLFILE, char *file);
DESCRIPTION
Pass a char * to a null-terminated string naming a file with the con-
catenation of CRL (in PEM format) to use in the certificate validation
that occurs during the SSL exchange.
When curl is built to use NSS or GnuTLS, there is no way to influence
the use of CRL passed to help in the verification process.
When libcurl is built with OpenSSL support, X509_V_FLAG_CRL_CHECK and
X509_V_FLAG_CRL_CHECK_ALL are both set, requiring CRL check against all
the elements of the certificate chain if a CRL file is passed. Also
note that CURLOPT_CRLFILE(3) will imply CURLSSLOPT_NO_PARTIALCHAIN (see
CURLOPT_SSL_OPTIONS(3)) since curl 7.71.0 due to an OpenSSL bug.
This option makes sense only when used in combination with the CUR-
LOPT_SSL_VERIFYPEER(3) option.
A specific error code (CURLE_SSL_CRL_BADFILE) is defined with the
option. It is returned when the SSL exchange fails because the CRL file
cannot be loaded. A failure in certificate verification due to a revo-
cation information found in the CRL does not trigger this specific
error.
The application does not have to keep the string around after setting
this option.
DEFAULT
NULL
PROTOCOLS
All TLS-based protocols
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_CRLFILE, "/etc/certs/crl.pem");
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
AVAILABILITY
Added in 7.19.0
RETURN VALUE
Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if
not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
CURLOPT_SSL_VERIFYPEER(3), CURLOPT_SSL_VERIFYHOST(3), CUR-
LOPT_PROXY_CRLFILE(3),
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 26, 2021 CURLOPT_CRLFILE(3)