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65 lines
2.3 KiB
Groff
65 lines
2.3 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_PROXY_ISSUERCERT.md
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.TH CURLOPT_PROXY_ISSUERCERT 3 "2024-06-01" libcurl
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.SH NAME
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CURLOPT_PROXY_ISSUERCERT \- proxy issuer SSL certificate filename
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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_PROXY_ISSUERCERT, char *file);
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.fi
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.SH DESCRIPTION
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Pass a char pointer to a null\-terminated string naming a \fIfile\fP holding a CA
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certificate in PEM format. If the option is set, an additional check against
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the peer certificate is performed to verify the issuer of the HTTPS proxy is
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indeed the one associated with the certificate provided by the option. This
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additional check is useful in multi\-level PKI where one needs to enforce that
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the peer certificate is from a specific branch of the tree.
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This option makes sense only when used in combination with the
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\fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP option. Otherwise, the result of the
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check is 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
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(\fICURLOPT_PROXY_SSL_VERIFYPEER(3)\fP has to be set too for the check to
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fail).
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The application does not have to keep the string around after setting this
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option.
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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: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
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This option works only with the following TLS backends:
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GnuTLS and OpenSSL
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.SH EXAMPLE
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.nf
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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://example.com/");
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/* using an HTTPS proxy */
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curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:443");
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curl_easy_setopt(curl, CURLOPT_PROXY_ISSUERCERT, "/etc/certs/cacert.pem");
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res = curl_easy_perform(curl);
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curl_easy_cleanup(curl);
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}
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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 and GnuTLS 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_PROXY_SSL_VERIFYHOST (3),
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.BR CURLOPT_PROXY_SSL_VERIFYPEER (3),
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.BR CURLOPT_SSL_VERIFYHOST (3),
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.BR CURLOPT_SSL_VERIFYPEER (3)
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