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08a3e8e19a
These libraries do not support TLS 1.3 and have been marked for removal for over a year. We want to help users select a TLS dependency that is future-proof and reliable, and not supporting TLS 1.3 in 2025 does not infer confidence. Users who build libcurl are likely to be served better and get something more future-proof with a TLS library that supports 1.3. Closes #16677
80 lines
1.7 KiB
Markdown
80 lines
1.7 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLOPT_SSLKEY
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Section: 3
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Source: libcurl
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See-also:
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- CURLOPT_SSLCERT (3)
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- CURLOPT_SSLKEYTYPE (3)
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- CURLOPT_SSLKEY_BLOB (3)
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Protocol:
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- TLS
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TLS-backend:
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- OpenSSL
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- mbedTLS
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- Schannel
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- wolfSSL
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Added-in: 7.9.3
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---
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# NAME
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CURLOPT_SSLKEY - private key file for TLS and SSL client cert
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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_setopt(CURL *handle, CURLOPT_SSLKEY, char *keyfile);
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~~~
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# DESCRIPTION
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Pass a pointer to a null-terminated string as parameter. The string should be
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the filename of your private key. The default format is "PEM" and can be
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changed with CURLOPT_SSLKEYTYPE(3).
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(Windows) This option is ignored by the Schannel SSL backend because it
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expects the private key to be already present in the key-chain or PKCS#12 file
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containing the certificate.
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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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Using this option multiple times makes the last set string override the
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previous ones. Set it to NULL to disable its use again.
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# DEFAULT
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NULL
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# %PROTOCOLS%
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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://example.com/");
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curl_easy_setopt(curl, CURLOPT_SSLCERT, "client.pem");
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curl_easy_setopt(curl, CURLOPT_SSLKEY, "key.pem");
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curl_easy_setopt(curl, CURLOPT_KEYPASSWD, "s3cret");
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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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~~~
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# %AVAILABILITY%
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# RETURN VALUE
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curl_easy_setopt(3) returns a CURLcode indicating success or error.
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CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
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libcurl-errors(3).
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