| 0,0 → 1,51 |
|---|
| |
| SERVER_SECRET |
| ============= |
| |
| In the base configuration, you will see something like this: |
| |
| OIDplus::baseConfig()->setValue('SERVER_SECRET', '................................'); |
| |
| This value is chosen randomly by the configuration file generator (setup). |
| |
| Where is SERVER_SECRET being used? |
| ---------------------------------- |
| |
| System: |
| - Auth content Store (OIDplusAuthContentStoreJWT.class.php): |
| Key to sign JWT tokens (used for Automated AJAX requests and logins with "Remember me") using PBKDF2+HMAC |
| (ONLY if the server does not have a Public/Private key pair!) |
| `JWT = HS512(hash_pbkdf2('sha512', SERVER_SECRET+"/OIDplusAuthContentStoreJWT", '', 10000, 64/*256bit*/, false))` |
| - Session Handler (OIDplusSessionHandler.class.php): |
| Encryption of session contents (regular logins) |
| if OpenSSL is installed: sha512-pbkdf2 + AES-256-CBC + sha3-512-hmac |
| if OpenSSL is not installed: sha3-512-hmac |
| - Auth utils: Generation of auth keys |
| `makeAuthKey(data) = sha3_512_hmac(data, "authkey:"+SERVER_SECRET);` |
| used at plugin forgot RA password (public/091): |
| `makeAuthKey("reset_password;" + email + ";" + timestamp) |
| = sha3_512_hmac("reset_password;" + email + ";" + timestamp, "authkey:"+SERVER_SECRET);` |
| used at plugin ViaThinkSoft FreeOID activation (public/200): |
| `makeAuthKey("com.viathinksoft.freeoid.activate_freeoid;" + email + ";" + timestamp) |
| = sha3_512_hmac("com.viathinksoft.freeoid.activate_freeoid;" + email + ";" + timestamp, "authkey:"+SERVER_SECRET);` |
| used at plugin invite RA (ra/092): |
| `makeAuthKey("activate_ra;" + email + ";" + timestamp) |
| = sha3_512_hmac("activate_ra;" + email + ";" + timestamp, "authkey:"+SERVER_SECRET);` |
| used at plugin change RA email (ra/102): |
| `makeAuthKey("activate_new_ra_email;" + old_email + ";" + new_email + ";" + timestamp) |
| = sha3_512_hmac("activate_new_ra_email;" + old_email + ";" + new_email + ";" + timestamp, "authkey:"+SERVER_SECRET);` |
| |
| Plugin WHOIS (public/100): |
| - Authentication token for hidden OIDs = `smallhash(SERVER_SECRET + "/WHOIS/" + id);` |
| |
| Plugin VNag version check (admin/901): |
| - Webreader password = `sha3_512(SERVER_SECRET + "/VNAG")` |
| |
| --- |
| |
| Important: Please never use SERVER_SECRET alone for any hashing/HMAC without adding any context to it. |
| |
| - Example: Bad `hmac(message, SERVER_SECRET)` |
| - Example: Good `hmac(message, 'xyz:'.SERVER_SECRET)` |
| |
| Reason: Since the SERVER_SECRET is used at many different places, we must make sure that the calculated values do not reveal information about the SERVER_SECRET in any kind. |