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MWCryptHash.php

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1<?php

13classMWCryptHash {

17protectedstatic ?string$algo =null;

22protectedstaticint$hashLength;

28publicstaticfunctionhashAlgo() {

29 $algorithm = self::$algo;

30if ( $algorithm !==null ) {

31return $algorithm;

32 }

34 $algos = hash_hmac_algos();

35 $preference = ['whirlpool','sha256' ];

37foreach ( $preference as $algorithm ) {

38if ( in_array( $algorithm, $algos,true ) ) {

39 self::$algo = $algorithm;

40return $algorithm;

41 }

42 }

44thrownew DomainException('Could not find an acceptable hashing function.' );

45 }

55publicstaticfunctionhashLength( $raw =true ) {

56 self::$hashLength ??= strlen( self::hash('',true ) );

57// Optimisation: Skip computing the length of non-raw hashes.

58// The algos in hashAlgo() all produce a digest that is a multiple

59// of 8 bits, where hex is always twice the length of binary byte length.

60return $raw ? self::$hashLength : self::$hashLength * 2;

61 }

71publicstaticfunctionhash( $data, $raw =true ) {

72returnhash( self::hashAlgo(), $data, $raw );

73 }

84publicstaticfunctionhmac( $data, $key, $raw =true ) {

85if ( !is_string( $key ) ) {

86// hash_hmac tolerates non-string (would return null with warning)

87thrownew InvalidArgumentException('Invalid key type: ' . get_debug_type( $key ) );

88 }

89return hash_hmac( self::hashAlgo(), $data, $key, $raw );

90 }

92}

MWCryptHash

Utility functions for generating hashes.

DefinitionMWCryptHash.php:13

MWCryptHash\hashAlgo

static hashAlgo()

Decide on the best acceptable hash algorithm we have available for hash()

DefinitionMWCryptHash.php:28

MWCryptHash\hashLength

static hashLength( $raw=true)

Return the byte-length output of the hash algorithm we are using in self::hash and self::hmac.

DefinitionMWCryptHash.php:55

MWCryptHash\$hashLength

static int $hashLength

The number of bytes outputted by the hash algorithm.

DefinitionMWCryptHash.php:22

MWCryptHash\$algo

static string $algo

The hash algorithm being used.

DefinitionMWCryptHash.php:17

MWCryptHash\hmac

static hmac( $data, $key, $raw=true)

Generate a keyed cryptographic hash value (HMAC) for a string, making use of the best hash algorithm ...

DefinitionMWCryptHash.php:84

MWCryptHash\hash

static hash( $data, $raw=true)

Generate a cryptographic hash value (message digest) for a string, making use of the best hash algori...

DefinitionMWCryptHash.php:71