The user may opt to verify the file they download using a signature for that file. In order to do so, user must execute.
 
The user can obtain OpenSSL directly from https://www.openssl.org/.  
 
Use the following command
 
openssl dgst -sha256 -verify <pub-key> -signature /tmp/sign.sha256 <file>
 
 
For Example:
openssl dgst -sha256 -verify codesigning-pubkey.pem -signature iOS_WebRTCConnectSDK_Signature.sha256 iOS_WebRTCConnectSDK.zip