Openssl_verify (): the specified key parameter cannot be forced into the public key for the .pem file

Question

Currently trying to read the .pem public key in order to verify it through openssl .

 /** * Check whether the signed message sent back by the server is * correct or not. */ function check($str, $MAC) { $fp = fopen( dirname(__FILE__) . '/rsa_public_key.pem', 'r' ); $cert = fread($fp, 8192); fclose($fp); $pubkeyid = openssl_get_publickey($cert); return openssl_verify($str, $MAC, $pubkeyid); } 

With that said, after running my script, I get this error:

openssl_verify(): supplied key param cannot be coerced into a public key in some/path at line X

I originally wrote this function to accept .cer certificates. This explains the difference between all of these different key formats . As far as I understand, .pem similar to .cer , however I couldn’t understand all my life how to allow my script to read my .pem file.

My question is: what do I need to make my function read this public key?

EDIT: After some Googling, I tried using file_get_contents() for a specific path, but I would get the same error.

What can cause this error?

Answer 1

After opening this .pem file .pem everything was on one line. Each line seems to require a length of 64 characters, so I made sure that each line has 64 lines and is successfully parsed. Has nothing to do with .cer .

Answer 2

In addition, the lines -----BEGIN PUBLIC KEY----- and -----END PUBLIC KEY----- must contain exactly five dashes on each side. No more no less.

At the end of the last line, there may or may not be a new line.

Windows trailing lines (CR / LF) are allowed even in * nix-hosted PHP.