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CURLOPT_S...IC_KEY_MD5(3) Library Functions Manual CURLOPT_S...IC_KEY_MD5(3) NAME CURLOPT_SSH_HOST_PUBLIC_KEY_MD5 - MD5 checksum of SSH server public key SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_HOST_PUBLIC_KEY_MD5, char *md5); DESCRIPTION Pass a char pointer pointing to a string containing 32 hexadecimal dig- its. The string should be the 128 bit MD5 checksum of the remote host's public key, and libcurl aborts the connection to the host unless the MD5 checksum match. MD5 is a weak algorithm. We strongly recommend using CUR- LOPT_SSH_HOST_PUBLIC_KEY_SHA256(3) instead. The application does not have to keep the string around after setting this option. Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again. DEFAULT NULL PROTOCOLS This functionality affects scp and sftp EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode res; curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/file"); curl_easy_setopt(curl, CURLOPT_SSH_HOST_PUBLIC_KEY_MD5, "afe17cd62a0f3b61f1ab9cb22ba269a7"); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } } AVAILABILITY Added in curl 7.17.1 RETURN VALUE curl_easy_setopt(3) returns a CURLcode indicating success or error. CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3). SEE ALSO CURLOPT_SSH_AUTH_TYPES(3), CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256(3), CUR- LOPT_SSH_KNOWNHOSTS(3), CURLOPT_SSH_PUBLIC_KEYFILE(3) libcurl 2025-06-03 CURLOPT_S...IC_KEY_MD5(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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