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curldown is this new file format for libcurl man pages. It is markdown inspired with differences: - Each file has a set of leading headers with meta-data - Supports a small subset of markdown - Uses .md file extensions for editors/IDE/GitHub to treat them nicely - Generates man pages very similar to the previous ones - Generates man pages that still convert nicely to HTML on the website - Detects and highlights mentions of curl symbols automatically (when their man page section is specified) tools: - cd2nroff: converts from curldown to nroff man page - nroff2cd: convert an (old) nroff man page to curldown - cdall: convert many nroff pages to curldown versions - cd2cd: verifies and updates a curldown to latest curldown This setup generates .3 versions of all the curldown versions at build time. CI: Since the documentation is now technically markdown in the eyes of many things, the CI runs many more tests and checks on this documentation, including proselint, link checkers and tests that make sure we capitalize the first letter after a period... Closes #12730
101 lines
2.4 KiB
Markdown
101 lines
2.4 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLINFO_CERTINFO
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Section: 3
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Source: libcurl
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See-also:
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- CURLINFO_CAPATH (3)
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- curl_easy_getinfo (3)
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- curl_easy_setopt (3)
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---
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# NAME
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CURLINFO_CERTINFO - get the TLS certificate chain
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CERTINFO,
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struct curl_certinfo **chainp);
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~~~
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# DESCRIPTION
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Pass a pointer to a *struct curl_certinfo ** and it is set to point to a
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struct that holds info about the server's certificate chain, assuming you had
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CURLOPT_CERTINFO(3) enabled when the request was made.
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~~~c
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struct curl_certinfo {
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int num_of_certs;
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struct curl_slist **certinfo;
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};
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~~~
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The *certinfo* struct member is an array of linked lists of certificate
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information. The *num_of_certs* struct member is the number of
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certificates which is the number of elements in the array. Each certificate's
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list has items with textual information in the format "name:content" such as
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&"Subject:Foo", "Issuer:Bar", etc. The items in each list varies depending on
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the SSL backend and the certificate.
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# PROTOCOLS
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All TLS-based
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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CURLcode res;
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curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
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/* connect to any HTTPS site, trusted or not */
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
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curl_easy_setopt(curl, CURLOPT_CERTINFO, 1L);
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res = curl_easy_perform(curl);
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if(!res) {
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int i;
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struct curl_certinfo *ci;
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res = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &ci);
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if(!res) {
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printf("%d certs!\n", ci->num_of_certs);
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for(i = 0; i < ci->num_of_certs; i++) {
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struct curl_slist *slist;
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for(slist = ci->certinfo[i]; slist; slist = slist->next)
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printf("%s\n", slist->data);
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}
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}
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}
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curl_easy_cleanup(curl);
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}
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}
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~~~
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See also the *certinfo.c* example.
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# AVAILABILITY
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This option is only working in libcurl built with OpenSSL, GnuTLS, Schannel or
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Secure Transport. GnuTLS support added in 7.42.0. Schannel support added in
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7.50.0. Secure Transport support added in 7.79.0.
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Added in 7.19.1
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# RETURN VALUE
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Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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