author | William Roberts <williamr@symbian.org> |
Tue, 06 Apr 2010 20:34:33 +0100 | |
branch | CompilerCompatibility |
changeset 14 | 3f122ca50ab9 |
parent 2 | 1c7bc153c08e |
child 26 | 9abfd4f00d37 |
permissions | -rw-r--r-- |
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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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/* |
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* %version: 9 % |
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*/ |
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// This is enumeration of EAPOL source code. |
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#if defined(USE_EAP_MINIMUM_RELEASE_TRACES) |
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#undef EAP_FILE_NUMBER_ENUM |
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#define EAP_FILE_NUMBER_ENUM 3 |
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#undef EAP_FILE_NUMBER_DATE |
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#define EAP_FILE_NUMBER_DATE 1127594498 |
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#endif //#if defined(USE_EAP_MINIMUM_RELEASE_TRACES) |
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|
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#include "eap_am_memory.h" |
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#include "eap_tools.h" |
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#include "eap_crypto_api.h" |
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#include "eap_am_bloom_algorithm.h" |
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|
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//-------------------------------------------------- |
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|
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// |
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EAP_FUNC_EXPORT eap_am_bloom_algorithm_c::~eap_am_bloom_algorithm_c() |
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{ |
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} |
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//-------------------------------------------------- |
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|
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// |
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EAP_FUNC_EXPORT eap_am_bloom_algorithm_c::eap_am_bloom_algorithm_c( |
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abs_eap_am_tools_c * const tools, |
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abs_eap_am_bloom_algorithm_store_c * const store, |
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const u32_t bloom_bit_index_size) |
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: m_am_tools(tools) |
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, m_store(store) |
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, m_bloom_bit_index_size(bloom_bit_index_size) |
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, m_is_valid(false) |
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{ |
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EAP_TRACE_BEGIN(m_am_tools, TRACE_FLAGS_DEFAULT); |
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|
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eap_status_e status = set_bloom_bit_index_size(bloom_bit_index_size); |
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if (status != eap_status_ok) |
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{ |
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EAP_TRACE_ERROR( |
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m_am_tools, |
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TRACE_FLAGS_DEFAULT, |
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(EAPL("ERROR: BLOOM: Illegal bit index size %d.\n"), |
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bloom_bit_index_size)); |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return; |
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} |
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|
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if (m_store == 0 |
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|| m_store->get_is_valid() == false) |
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{ |
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EAP_TRACE_ERROR(m_am_tools, TRACE_FLAGS_DEFAULT, (EAPL("ERROR: BLOOM: Store is invalid.\n"))); |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return; |
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} |
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status = m_store->set_bloom_bit_index_size(bloom_bit_index_size); |
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if (status != eap_status_ok) |
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{ |
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EAP_TRACE_ERROR( |
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m_am_tools, |
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TRACE_FLAGS_DEFAULT, |
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(EAPL("ERROR: BLOOM: Illegal bit index size %d.\n"), |
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bloom_bit_index_size)); |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return; |
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} |
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|
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set_is_valid(); |
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|
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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} |
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|
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//-------------------------------------------------- |
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|
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/// This is the count of bits in the index of Bloom algorithm. |
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EAP_FUNC_EXPORT eap_status_e eap_am_bloom_algorithm_c::set_bloom_bit_index_size(const u32_t bloom_bit_index_size) |
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{ |
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if (bloom_bit_index_size > 32ul) |
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{ |
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// This is absolut maximum value. |
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// Much smaller value should be used in real application. |
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// 32 bits long index means 2^32 bit long bit store. |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_parameter); |
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} |
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else if (bloom_bit_index_size < 4ul) |
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107 |
{ |
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// This is absolut minimum value. |
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// Much bigger value should be used in real application. |
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// 4 bits long index means 2^4 bit long bit store. |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_parameter); |
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} |
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113 |
|
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m_bloom_bit_index_size = bloom_bit_index_size; |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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} |
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117 |
|
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//-------------------------------------------------- |
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119 |
|
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120 |
/** |
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* @code |
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* 0 1 2 3 4 5 |
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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 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | data 0 | data 1 | data 2 | data 3 | data 4 | data 5 | ... |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* ^ ^ ^ ^ ^ |
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* | | | | | |
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* | | | | | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* | bit_index 0 | bit_index 1 | bit_index 2 | bit_index 3 | |
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
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* @endcode |
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*/ |
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EAP_FUNC_EXPORT u32_t eap_am_bloom_algorithm_c::bloom_filter_get_index( |
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const u32_t queried_bit_index, |
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const void * const message_digest, |
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const u32_t message_digest_length) |
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139 |
{ |
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const u8_t * const input_data = static_cast<const u8_t *>(message_digest); |
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u32_t bit_index = 0ul; |
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u32_t start_byte = (queried_bit_index * m_bloom_bit_index_size) / 8ul; |
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u32_t end_byte = (queried_bit_index * m_bloom_bit_index_size + (m_bloom_bit_index_size - 1ul)) / 8ul; |
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144 |
|
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for (u32_t data_ind = start_byte; data_ind <= end_byte; data_ind++) |
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146 |
{ |
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i32_t shift = ((data_ind+1ul) * 8ul) - ((queried_bit_index + 1ul) * m_bloom_bit_index_size); |
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if (shift < 0) |
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149 |
{ |
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const u32_t pre_mask = 0xffffffff >> (32ul - m_bloom_bit_index_size); |
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const u8_t mask = static_cast<u8_t>(pre_mask >> (-shift)); |
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bit_index |= (input_data[data_ind] & mask) << (-shift); |
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} |
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else |
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155 |
{ |
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const u8_t mask = 0xff << shift; |
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bit_index |= (input_data[data_ind] & mask) >> (shift); |
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} |
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} |
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160 |
|
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return bit_index; |
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} |
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163 |
|
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//-------------------------------------------------- |
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165 |
|
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// |
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EAP_FUNC_EXPORT eap_status_e eap_am_bloom_algorithm_c::bloom_filter_create_message_digest( |
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const void * const blob, |
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const u32_t blob_length, |
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void * const message_digest, |
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u32_t * const message_digest_length) |
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{ |
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EAP_TRACE_BEGIN(m_am_tools, TRACE_FLAGS_DEFAULT); |
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174 |
|
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crypto_sha1_c sha1(m_am_tools); |
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176 |
|
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if (sha1.get_is_valid() == false) |
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178 |
{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_allocation_error); |
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181 |
} |
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182 |
|
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eap_status_e status = sha1.hash_init(); |
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if (status != eap_status_ok) |
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185 |
{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, status); |
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} |
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189 |
|
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if (message_digest == 0 |
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|| message_digest_length == 0 |
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|| *message_digest_length < sha1.get_digest_length()) |
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193 |
{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_parameter); |
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} |
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197 |
|
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*message_digest_length = sha1.get_digest_length(); |
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199 |
|
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status = sha1.hash_update(blob, blob_length); |
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if (status != eap_status_ok) |
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202 |
{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, status); |
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} |
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|
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status = sha1.hash_final( |
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message_digest, |
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message_digest_length); |
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|
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EAP_ASSERT_ALWAYS(sha1.get_digest_length() == *message_digest_length); |
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|
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EAP_TRACE_DATA_DEBUG(m_am_tools, TRACE_FLAGS_DEFAULT, (EAPL("BLOOM: blob"), |
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blob, |
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blob_length)); |
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|
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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} |
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|
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//-------------------------------------------------- |
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222 |
|
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// |
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EAP_FUNC_EXPORT eap_status_e eap_am_bloom_algorithm_c::bloom_filter_check_is_blob_new( |
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const void * const blob, |
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const u32_t blob_length) |
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{ |
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EAP_TRACE_BEGIN(m_am_tools, TRACE_FLAGS_DEFAULT); |
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|
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if (m_store->bloom_filter_check_does_bit_store_exists() != eap_status_ok) |
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{ |
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// No valid BIT file. blobs are assumed new. |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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} |
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|
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static const u32_t DIGEST_LENGTH = 32ul; |
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|
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u8_t message_digest[DIGEST_LENGTH]; |
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u32_t message_digest_length = DIGEST_LENGTH; |
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|
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eap_status_e status = bloom_filter_create_message_digest( |
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blob, |
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blob_length, |
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message_digest, |
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&message_digest_length); |
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if (status != eap_status_ok) |
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{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, status); |
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} |
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|
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253 |
|
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for (u32_t ind = 0; ind < (message_digest_length * 8ul)/m_bloom_bit_index_size; ind++) |
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255 |
{ |
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u32_t bit_index = bloom_filter_get_index(ind, message_digest, message_digest_length); |
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|
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if (m_store->bloom_filter_get_bit_index(bit_index) == 0) |
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{ |
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// Because bit is NOT set this blob is new. |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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} |
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} |
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265 |
|
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// Because all bits are set this blob is most probably already used. |
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|
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_illegal_data_payload); |
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} |
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|
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//-------------------------------------------------- |
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273 |
|
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// |
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EAP_FUNC_EXPORT eap_status_e eap_am_bloom_algorithm_c::bloom_filter_set_blob_is_used( |
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const void * const blob, |
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const u32_t blob_length) |
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{ |
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EAP_TRACE_BEGIN(m_am_tools, TRACE_FLAGS_DEFAULT); |
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280 |
|
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if (m_store->bloom_filter_check_does_bit_store_exists() != eap_status_ok) |
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282 |
{ |
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// No valid BIT file. blobs are assumed new. |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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286 |
} |
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287 |
|
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static const u32_t DIGEST_LENGTH = 32ul; |
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289 |
|
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u8_t message_digest[DIGEST_LENGTH]; |
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u32_t message_digest_length = DIGEST_LENGTH; |
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292 |
|
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eap_status_e status = bloom_filter_create_message_digest( |
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blob, |
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blob_length, |
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message_digest, |
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&message_digest_length); |
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if (status != eap_status_ok) |
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299 |
{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, status); |
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302 |
} |
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|
303 |
|
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304 |
|
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for (u32_t ind = 0; ind < (message_digest_length * 8ul)/m_bloom_bit_index_size; ind++) |
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306 |
{ |
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u32_t bit_index = bloom_filter_get_index(ind, message_digest, message_digest_length); |
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|
308 |
|
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309 |
status = m_store->bloom_filter_set_bit_index(bit_index); |
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if (status != eap_status_ok) |
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{ |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, status); |
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} |
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} |
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EAP_TRACE_END(m_am_tools, TRACE_FLAGS_DEFAULT); |
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return EAP_STATUS_RETURN(m_am_tools, eap_status_ok); |
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} |
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//-------------------------------------------------- |
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// |
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EAP_FUNC_EXPORT void eap_am_bloom_algorithm_c::set_is_valid() |
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{ |
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m_is_valid = true; |
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} |
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//-------------------------------------------------- |
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// |
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EAP_FUNC_EXPORT bool eap_am_bloom_algorithm_c::get_is_valid() |
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{ |
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return m_is_valid; |
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} |
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//-------------------------------------------------- |
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// End. |