Hi,

Today looking the forum I found different post for this topic but no one with a good solution, so I dedicated a couple of hours for to find a solutions.

The SHA512 pw is created in this way:
$password='test';    $salt=random_str(8);
$password_to_db="{SSHA512}".base64_encode(hash('sha512',$password.$salt,true).$salt);

That means that you cannot do the login without to read before the hashed pw from DB for to extract the $salt

So after had read the data from DB you may determinate le new hash i this way
$password='test12345';
$hashfromdb="{SSHA512}R7Agj9845.....";
$pwslt=substr($letta,9,strlen($letta)-9);   # Cut the first 9 chars {SSHA512}
$pwslt=base64_decode($pwslt);               # Decode the rest from base64
$pws=substr($pwslt,0,64);                       # Separate the hash (first 512 bit > 64 chars)
$slt=substr($pwslt,64,strlen($pwslt)-64); # Separate the used salt
$hashtodb="{SSHA512}".base64_encode(hash('sha512',$pwchiara.$slt,true).$slt);  # Calculate the new hash

So now you have to use $hashtodb in the select for the password

I hope it will be usefull for someone.

Have a nice day