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cb01bbf97b
This adds a pure PHP implementation of the cryptographic functions supported in PHP 7.2+. It provides the necessary backwards compatibility required to support signature verification and other security features going forward across all supported PHP versions. Props paragoninitiativeenterprises Fixes #45806. See #39309. Built from https://develop.svn.wordpress.org/trunk@44953 git-svn-id: http://core.svn.wordpress.org/trunk@44784 1a063a9b-81f0-0310-95a4-ce76da25c4cd
58 lines
1.3 KiB
PHP
58 lines
1.3 KiB
PHP
<?php
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if (class_exists('ParagonIE_Sodium_Core32_XSalsa20', false)) {
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return;
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}
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/**
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* Class ParagonIE_Sodium_Core32_XSalsa20
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*/
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abstract class ParagonIE_Sodium_Core32_XSalsa20 extends ParagonIE_Sodium_Core32_HSalsa20
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{
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/**
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* Expand a key and nonce into an xsalsa20 keystream.
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*
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* @internal You should not use this directly from another application
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*
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* @param int $len
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* @param string $nonce
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* @param string $key
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function xsalsa20($len, $nonce, $key)
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{
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$ret = self::salsa20(
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$len,
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self::substr($nonce, 16, 8),
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self::hsalsa20($nonce, $key)
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);
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return $ret;
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}
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/**
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* Encrypt a string with XSalsa20. Doesn't provide integrity.
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*
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* @internal You should not use this directly from another application
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*
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* @param string $message
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* @param string $nonce
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* @param string $key
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* @return string
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* @throws SodiumException
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* @throws TypeError
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*/
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public static function xsalsa20_xor($message, $nonce, $key)
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{
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return self::xorStrings(
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$message,
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self::xsalsa20(
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self::strlen($message),
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$nonce,
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$key
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)
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);
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}
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}
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