MediaWiki  master
MWCryptRand.php
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1 <?php
28 
29 class MWCryptRand {
34  protected static function singleton() {
35  return MediaWikiServices::getInstance()->getCryptRand();
36  }
37 
47  public static function wasStrong() {
48  return true;
49  }
50 
60  public static function generate( $bytes ) {
61  return random_bytes( floor( $bytes ) );
62  }
63 
71  public static function generateHex( $chars ) {
72  // hex strings are 2x the length of raw binary so we divide the length in half
73  // odd numbers will result in a .5 that leads the generate() being 1 character
74  // short, so we use ceil() to ensure that we always have enough bytes
75  $bytes = ceil( $chars / 2 );
76  // Generate the data and then convert it to a hex string
77  $hex = bin2hex( random_bytes( $bytes ) );
78 
79  // A bit of paranoia here, the caller asked for a specific length of string
80  // here, and it's possible (eg when given an odd number) that we may actually
81  // have at least 1 char more than they asked for. Just in case they made this
82  // call intending to insert it into a database that does truncation we don't
83  // want to give them too much and end up with their database and their live
84  // code having two different values because part of what we gave them is truncated
85  // hence, we strip out any run of characters longer than what we were asked for.
86  return substr( $hex, 0, $chars );
87  }
88 }
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
static wasStrong()
Return a boolean indicating whether or not the source used for cryptographic random bytes generation ...
Definition: MWCryptRand.php:47
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 MediaWikiServices
Definition: injection.txt:23
static generate( $bytes)
Generate a run of cryptographically random data and return it in raw binary form. ...
Definition: MWCryptRand.php:60
static singleton()
Definition: MWCryptRand.php:34
static generateHex( $chars)
Generate a run of cryptographically random data and return it in hexadecimal string format...
Definition: MWCryptRand.php:71
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
Definition: injection.txt:35