CURLOPT_SSLENGINE(3)

CURLOPT_SSLENGINE3

Ssl engine identifier

Usage

#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSLENGINE, char *id);

Overview

Pass a pointer to a null-terminated string as parameter. It is used as the identifier for the crypto engine you want to use for your private key.

The application does not have to keep the string around after setting this option.

Default

NULL

Protocols

All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.

Examples

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_SSLENGINE, "dynamic");
    res = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

Return value

CURLE_OK - Engine found.

CURLE_SSL_ENGINE_NOTFOUND - Engine not found, or OpenSSL was not built with engine support.

CURLE_SSL_ENGINE_INITFAILED - Engine found but initialization failed.

CURLE_NOT_BUILT_IN - Option not built in, OpenSSL is not the SSL backend.

CURLE_UNKNOWN_OPTION - Option not recognized.

CURLE_OUT_OF_MEMORY - Insufficient heap space.

Releases

79 releases since OS X 10.10; the text changed 13 times.

  1. 10.10–10.11.6
  2. 10.12–10.12.5
  3. 10.12.6–10.14.6
  4. 10.15–11.5
  5. 12.0.1–12.2
  6. 12.3–12.5
  7. 13.0
  8. 13.1
  9. 13.2
  10. 13.3
  11. 13.4
  12. 13.5–14.1
  13. 14.2–14.4
  14. 14.5–26.5

Availability

Only if the SSL backend is OpenSSL built with engine support.

From curl 166.0.0.0.1 in macOS 26.5. Parsed by carta from the page's man source.