(PECL radius >= 1.2.0)
radius_demangle_mppe_key — Derives mppe-keys from mangled data
radius_demangle_mppe_key(resource $radius_handle, string $mangled): string
When using MPPE with MS-CHAPv2, the send- and recv-keys are mangled (see » RFC 2548), however this function is useless, because I don't think that there is or will be a PPTP-MPPE implementation in PHP.
radius_handleThe RADIUS resource.
mangledThe mangled data to demangle
Returns the demangled string, or false on error.
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https://www.php.net/manual/en/function.radius-demangle-mppe-key.php