eapol/eapol_framework/eapol_common/am/include/ms_mppe_send_recv_key.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:47:43 +0200
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/*
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* Copyright (c) 2001-2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  EAP and WLAN authentication protocols.
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*
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*/
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#if !defined(_MS_MPPE_SEND_RECV_KEY_H_)
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#define _MS_MPPE_SEND_RECV_KEY_H_
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//----------------------------------------------------------------------------
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//
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// Bytes needed:
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//      4: Vendor-Id
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//      1: Vendor-Type
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//      1: Vendor-Length
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//      2: Salt
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//      1: Key-Length
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//     32: Key
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//     15: Padding
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//     -----------------
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//     56: Total
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//
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// Copy MS-MPPE-Send-Key
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//
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// 0                   1                   2                   3
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// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                  Vendor-ID                                  |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | Vendor-Type   | Vendor-Length |           Salt              |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | Key Length    |         Key total 32 bytes                  |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Key (cont)                            |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |               |       Padding total 15 bytes                |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Padding                               |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Padding                               |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |                       Padding                               |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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const u32_t MS_MPPE_KEY_LENGTH     = 32u;
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const u32_t MS_MPPE_PADDING_LENGTH = 15u;
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const u8_t MS_MPPE_Send_Key = 16u;
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const u8_t MS_MPPE_Recv_Key = 17u;
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#pragma pack(1)
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// 
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class ms_mppe_send_recv_key_c
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{
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private:
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	//--------------------------------------------------
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	u32_t m_vendor_id;
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	u8_t m_vendor_type;
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	u8_t m_vendor_length;
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	u16_t m_salt;
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	u8_t m_key_length;
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	u8_t m_key[MS_MPPE_KEY_LENGTH];
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	u8_t m_padding[MS_MPPE_PADDING_LENGTH];
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	//--------------------------------------------------
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protected:
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	//--------------------------------------------------
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	//--------------------------------------------------
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public:
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	//--------------------------------------------------
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	// 
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	~ms_mppe_send_recv_key_c()
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	{
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	}
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	// 
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	ms_mppe_send_recv_key_c(abs_eap_am_tools_c * const m_am_tools)
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	{
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		reset_header(m_am_tools);
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	}
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	void reset_header(abs_eap_am_tools_c * const m_am_tools)
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	{
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		m_vendor_id = eap_htonl(311); // microsoft
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		m_vendor_type = 0u;
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		m_vendor_length = sizeof(*this) - sizeof(m_vendor_id);
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		m_salt = 0u;
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		m_key_length = 0u;
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		m_am_tools->memset(m_key, 0, sizeof(m_key));
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		m_am_tools->memset(m_padding, 0, sizeof(m_padding));
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	}
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	eap_status_e set_key(
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		abs_eap_am_tools_c * const m_am_tools,
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		const u8_t * const key,
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		const u32_t key_length,
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		const u8_t key_type)
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	{
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		if (key_length >= sizeof(m_key))
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		{
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			m_vendor_type = key_type; // MS-MPPE-Send-Key or MS-MPPE-Recv-Key
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			m_key_length = sizeof(m_key);
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			m_am_tools->memmove(m_key, key, sizeof(m_key));
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			return eap_status_ok;
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		}
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		else
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		{
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			return eap_status_key_error;
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		}
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	}
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	// 
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	//--------------------------------------------------
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}; // class ms_mppe_send_recv_key_c
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#pragma pack()
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#endif //#if !defined(_MS_MPPE_SEND_RECV_KEY_H_)
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//--------------------------------------------------
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// End.