118 if ( strlen( $secretKeyMaterial ) < 16 ) {
119 throw new InvalidArgumentException(
"secret was too short." );
121 $this->skm = $secretKeyMaterial;
125 $this->cryptRand = $cryptRand;
130 $this->cacheKey =
$cache->makeKey(
'HKDF', mt_rand( 0, 16 ) );
139 if ( $this->lastK ) {
140 $this->
cache->set( $this->cacheKey, $this->lastK );
149 if ( $this->salt ==
'' ) {
150 $lastSalt = $this->
cache->get( $this->cacheKey );
151 if ( $lastSalt ===
false ) {
158 $lastSalt = $this->cryptRand->generate( 16 );
161 $this->salt = hash( $this->algorithm, $lastSalt,
true );
175 if ( $this->prk ===
'' ) {
177 $this->prk = self::HKDFExtract(
184 $CTXinfo = implode(
':', array_merge( $this->context, [
$context ] ) );
186 return self::HKDFExpand(
224 public static function HKDF( $hash, $ikm, $salt, $info, $L ) {
225 $prk = self::HKDFExtract( $hash,
$salt, $ikm );
226 $okm = self::HKDFExpand( $hash,
$prk, $info, $L );
241 return hash_hmac( $hash, $ikm,
$salt,
true );
259 private static function HKDFExpand( $hash, $prk, $info, $bytes, &$lastK =
'' ) {
260 $hashLen = self::$hashLength[$hash];
261 $rounds = ceil( $bytes / $hashLen );
264 if ( $bytes > 255 * $hashLen ) {
265 throw new InvalidArgumentException(
'Too many bytes requested from HDKFExpand' );
270 for ( $counter = 1; $counter <= $rounds; ++$counter ) {
273 $lastK . $info . chr( $counter ),
280 return substr(
$output, 0, $bytes );
interface is intended to be more or less compatible with the PHP memcached client.
generate( $bytes, $context='')
Produce $bytes of secure random data.
__construct( $secretKeyMaterial, $algorithm, BagOStuff $cache, $context, CryptRand $cryptRand)
string $skm
The secret key material.
getSaltUsingCache()
MW specific salt, cached from last run.
string $lastK
The last block (K(i)) of the most recent expanded key.
static HKDFExpand( $hash, $prk, $info, $bytes, &$lastK='')
Expand the key with the given context.
__destruct()
Save the last block generated, so the next user will compute a different PRK from the same SKM.
static HKDF( $hash, $ikm, $salt, $info, $L)
RFC5869 defines HKDF in 2 steps, extraction and expansion.
static int[] $hashLength
Round count is computed based on the hash'es output length, which neither php nor openssl seem to pro...
string $algorithm
The hash algorithm being used.
string $salt
binary string, the salt for the HKDF
string $prk
The pseudorandom key.
static HKDFExtract( $hash, $salt, $ikm)
Extract the PRK, PRK = HMAC(XTS, SKM) Note that the hmac is keyed with XTS (the salt),...
string $cacheKey
Cache key we'll use for our salt.
the array() calling protocol came about after MediaWiki 1.4rc1.
static configuration should be added through ResourceLoaderGetConfigVars instead can be used to get the real title after the basic globals have been set but before ordinary actions take place $output
do that in ParserLimitReportFormat instead use this to modify the parameters of the image all existing parser cache entries will be invalid To avoid you ll need to handle that somehow(e.g. with the RejectParserCacheValue hook) because MediaWiki won 't do it for you. & $defaults also a ContextSource after deleting those rows but within the same transaction you ll probably need to make sure the header is varied on and they can depend only on the ResourceLoaderContext $context
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