\phpseclib\CryptHash

__construct()

__construct(string  $hash = 'sha1') : \phpseclib\Crypt\Hash

Default Constructor.

Parameters

Returns

setKey()

setKey(string  $key = false) 

Sets the key for HMACs

Keys can be of any length.

Parameters

_computeKey()

_computeKey() 

Pre-compute the key used by the HMAC

Quoting http://tools.ietf.org/html/rfc2104#section-2, "Applications that use keys longer than B bytes will first hash the key using H and then use the resultant L byte string as the actual key to HMAC."

As documented in https://www.reddit.com/r/PHP/comments/9nct2l/symfonypolyfill_hash_pbkdf2_correct_fix_for/ when doing an HMAC multiple times it's faster to compute the hash once instead of computing it during every call

getHash()

getHash() : string

Gets the hash function.

As set by the constructor or by the setHash() method.

Returns

setHash()

setHash(string  $hash) 

Sets the hash function.

Parameters

hash()

hash(string  $text) : string

Compute the HMAC.

Parameters

Returns

getLength()

getLength() : integer

Returns the hash length (in bytes)

Returns

_md5()

_md5(string  $m) 

Wrapper for MD5

Parameters

_sha1()

_sha1(string  $m) 

Wrapper for SHA1

Parameters

_md2()

_md2(string  $m) 

Pure-PHP implementation of MD2

See RFC1319.

Parameters

_sha256()

_sha256(string  $m) 

Pure-PHP implementation of SHA256

See SHA-256 (a SHA-2 variant) pseudocode - Wikipedia.

Parameters

_sha512()

_sha512(string  $m) 

Pure-PHP implementation of SHA384 and SHA512

Parameters

_rightRotate()

_rightRotate(integer  $int, integer  $amt) : integer

Right Rotate

Parameters

Returns

_rightShift()

_rightShift(integer  $int, integer  $amt) : integer

Right Shift

Parameters

Returns

_not()

_not(integer  $int) : integer

Not

Parameters

Returns

_add()

_add() : integer

Add

_sha256() adds multiple unsigned 32-bit integers. Since PHP doesn't support unsigned integers and since the possibility of overflow exists, care has to be taken. BigInteger could be used but this should be faster.

Returns

_string_shift()

_string_shift(string  $string, integer  $index = 1) : string

String Shift

Inspired by array_shift

Parameters

Returns