ParagonIE_Sodium_Core_AEGIS_State256::decPartial( string $cn ): string

131    public function decPartial($cn)132    {133        $len = ParagonIE_Sodium_Core_Util::strlen($cn);134        // z = S1 ^ S4 ^ S5 ^ (S2 & S3)135        $z = $this->state[1]136            ^ $this->state[4]137            ^ $this->state[5]138            ^ ParagonIE_Sodium_Core_Util::andStrings($this->state[2], $this->state[3]);139 140        // t = ZeroPad(cn, 128)141        $t = str_pad($cn, 16, "\0", STR_PAD_RIGHT);142 143        // out = t ^ z144        $out = $t ^ $z;145 146        // xn = Truncate(out, |cn|)147        $xn = ParagonIE_Sodium_Core_Util::substr($out, 0, $len);148 149        // v = ZeroPad(xn, 128)150        $v = str_pad($xn, 16, "\0", STR_PAD_RIGHT);151        // Update(v)152        $this->update($v);153 154        // return xn155        return $xn;156    }