All of my connections to the DocuSign sandbox are getting this curl error:
error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure
I have only noticed this today, and can't remember the last time I checked the sandbox connection so I couldn't say when this first broke.
Specific to PHP, I changed the CURLOPT_SSLVERSION from this:
curl_setopt($c, CURLOPT_SSLVERSION, 3);
to this:
curl_setopt($c, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1)
and the API is functional again.