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66 lines
2.3 KiB
Groff
66 lines
2.3 KiB
Groff
.\" generated by cd2nroff 0.1 from CURLOPT_PROXY_CRLFILE.md
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.TH CURLOPT_PROXY_CRLFILE 3 "2024-08-02" libcurl
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.SH NAME
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CURLOPT_PROXY_CRLFILE \- HTTPS proxy Certificate Revocation List file
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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_CRLFILE, char *file);
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.fi
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.SH DESCRIPTION
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This option is for connecting to an HTTPS proxy, not an HTTPS server.
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Pass a char pointer to a null\-terminated string naming a \fIfile\fP with the
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concatenation of CRL (in PEM format) to use in the certificate validation that
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occurs during the SSL exchange.
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When curl is built to use GnuTLS, there is no way to influence the use of CRL
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passed to help in the verification process. When libcurl is built with OpenSSL
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support, X509_V_FLAG_CRL_CHECK and X509_V_FLAG_CRL_CHECK_ALL are both set,
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requiring CRL check against all the elements of the certificate chain if a CRL
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file is passed.
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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.
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A specific error code (\fICURLE_SSL_CRL_BADFILE\fP) is defined with the option. It
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is returned when the SSL exchange fails because the CRL file cannot be loaded.
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A failure in certificate verification due to a revocation information found in
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the CRL does not trigger this specific error.
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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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This functionality affects 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, OpenSSL and mbedTLS
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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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curl_easy_setopt(curl, CURLOPT_PROXY, "https://localhost:80");
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curl_easy_setopt(curl, CURLOPT_PROXY_CRLFILE, "/etc/certs/crl.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 curl 7.52.0
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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_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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