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Remove hash_equals() polyfill that is no longer needed 

This polyfill was added back in 2015
(1f62a53e0e). WP includes the same polyfill
since version 3.9.2 and WC requires WP >= 5.0
(7d672c38a4). So we don't need to maintain our own version of this function anymore.
This commit is contained in:
Rodrigo Primo 2020-01-23 14:36:37 -03:00
parent 82cf437e6e
commit b7aee86b2c
1 changed files with 0 additions and 30 deletions
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30
includes/wc-core-functions.php
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@ -1157,36 +1157,6 @@ function wc_get_user_agent() {
return isset( $_SERVER['HTTP_USER_AGENT'] ) ? wc_clean( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) ) : ''; // @codingStandardsIgnoreLine
}
// This function can be removed when WP 3.9.2 or greater is required.
if ( ! function_exists( 'hash_equals' ) ) :
/**
* Compare two strings in constant time.
*
* This function was added in PHP 5.6.
* It can leak the length of a string.
*
* @since 3.9.2
*
* @param string $a Expected string.
* @param string $b Actual string.
* @return bool Whether strings are equal.
*/
function hash_equals( $a, $b ) {
$a_length = strlen( $a );
if ( strlen( $b ) !== $a_length ) {
return false;
}
$result = 0;
// Do not attempt to "optimize" this.
for ( $i = 0; $i < $a_length; $i++ ) {
$result |= ord( $a[ $i ] ) ^ ord( $b[ $i ] );
}
return 0 === $result;
}
endif;
/**
* Generate a rand hash.
*