crypt : <span><a href="../Types/OutboundGroupSession/index.html#type-t">Types.OutboundGroupSession.t</a> Ctypes_static.ptr</span> <span>&#45;&gt;</span> <span>Unsigned.uint8 Ctypes_static.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t <span>&#45;&gt;</span> <span>Unsigned.uint8 Ctypes_static.ptr</span> <span>&#45;&gt;</span> Unsigned.size_t <span>&#45;&gt;</span> Unsigned.size_t</code></dt><dd><p><code>group_encrypt sess plaintext plaintext_len msg msg_len</code></p><p>Encrypt some plain-text. Returns th