108 if ( strlen( $secretKeyMaterial ) < 16 ) {
109 throw new MWException(
"MWCryptHKDF secret was too short." );
111 $this->skm = $secretKeyMaterial;
121 $this->cacheKey =
wfMemcKey(
'HKDF', mt_rand( 0, 16 ) );
130 if ( $this->lastK ) {
131 $this->
cache->set( $this->cacheKey, $this->lastK );
140 if ( $this->salt ==
'' ) {
141 $lastSalt = $this->
cache->get( $this->cacheKey );
142 if ( $lastSalt ===
false ) {
152 $this->salt = hash( $this->algorithm, $lastSalt,
true );
167 throw new MWException(
"Cannot use MWCryptHKDF without a secret." );
180 if ( is_null( self::$singleton ) ) {
196 if ( $this->prk ===
'' ) {
205 $CTXinfo = implode(
':', array_merge( $this->context, [
$context ] ) );
245 public static function HKDF( $hash, $ikm,
$salt, $info, $L ) {
262 return hash_hmac( $hash, $ikm,
$salt,
true );
282 $rounds = ceil( $bytes / $hashLen );
285 if ( $bytes > 255 * $hashLen ) {
286 throw new MWException(
"Too many bytes requested from HDKFExpand" );
291 for ( $counter = 1; $counter <= $rounds; ++$counter ) {
294 $lastK . $info . chr( $counter ),
301 return substr(
$output, 0, $bytes );
324 $bytes = ceil( $chars / 2 );
326 return substr( $hex, 0, $chars );
$wgSecretKey
This should always be customised in LocalSettings.php.
$wgHKDFSecret
Secret for hmac-based key derivation function (fast, cryptographically secure random numbers).
$wgHKDFAlgorithm
Algorithm for hmac-based key derivation function (fast, cryptographically secure random numbers).
wfMemcKey()
Make a cache key for the local wiki.
static HKDFExtract( $hash, $salt, $ikm)
Extract the PRK, PRK = HMAC(XTS, SKM) Note that the hmac is keyed with XTS (the salt),...
__destruct()
Save the last block generated, so the next user will compute a different PRK from the same SKM.
$algorithm
The hash algorithm being used.
static HKDFExpand( $hash, $prk, $info, $bytes, &$lastK='')
Expand the key with the given context.
$salt
binary string, the salt for the HKDF
$cache
The persistant cache.
realGenerate( $bytes, $context='')
Produce $bytes of secure random data.
$cacheKey
Cache key we'll use for our salt.
static generate( $bytes, $context)
Generate cryptographically random data and return it in raw binary form.
static generateHex( $chars, $context='')
Generate cryptographically random data and return it in hexadecimal string format.
static HKDF( $hash, $ikm, $salt, $info, $L)
RFC5869 defines HKDF in 2 steps, extraction and expansion.
getSaltUsingCache()
MW specific salt, cached from last run.
static $singleton
Singleton instance for public use.
$lastK
The last block (K(i)) of the most recent expanded key.
static singleton()
Return a singleton instance, based on the global configs.
$prk
The pseudorandom key.
$skm
The secret key material.
static $hashLength
Round count is computed based on the hash'es output length, which neither php nor openssl seem to pro...
__construct( $secretKeyMaterial, $algorithm, $cache, $context)
$context
a "context information" string CTXinfo (which may be null) See http://eprint.iacr....
static generate( $bytes, $forceStrong=false)
Generate a run of (ideally) cryptographically random data and return it in raw binary form.
static getLocalServerInstance( $fallback=CACHE_NONE)
Factory function for CACHE_ACCEL (referenced from DefaultSettings.php)
when a variable name is used in a it is silently declared as a new local masking the global
this hook is for auditing only RecentChangesLinked and Watchlist RecentChangesLinked and Watchlist e g Watchlist removed from all revisions and log entries to which it was applied This gives extensions a chance to take it off their books as the deletion has already been partly carried out by this point or something similar the user will be unable to create the tag set and then return false from the hook function Ensure you consume the ChangeTagAfterDelete hook to carry out custom deletion actions as context called by AbstractContent::getParserOutput May be used to override the normal model specific rendering of page content as context as context the output can only depend on parameters provided to this hook not on global state indicating whether full HTML should be generated If generation of HTML may be but other information should still be present in the ParserOutput object & $output
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
you have access to all of the normal MediaWiki so you can get a DB use the cache
CACHE_MEMCACHED $wgMainCacheType