src/security/FSec_DeviceKeyGenerator.cpp

   1 //
   2 // Open Service Platform
   3 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the License);
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //     http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16 //
  17
  18 /**
  19  * @file        FSec_DeviceKeyGenerator.cpp
  20  * @brief       This file contains the implementation of DeviceKeyGenerator class.
  21  */
  22
  23 #include <unique_ptr.h>
  24 #include <FBaseResult.h>
  25 #include <FBaseErrors.h>
  26 #include <FBaseUtilStringUtil.h>
  27 #include <FSecCryptoSha1Hash.h>
  28 #include <FSecCryptoSha1Hmac.h>
  29 #include <FSecSecretKey.h>
  30 #include <FBaseSysLog.h>
  31 #include <FBase_StringConverter.h>
  32 #include <FSec_DeviceKeyGenerator.h>
  33
  34 using namespace Tizen::Base;
  35 using namespace Tizen::Base::Utility;
  36 using namespace Tizen::Security::Crypto;
  37
  38
  39 namespace Tizen { namespace Security
  40 {
  41
  42 static const int _HASH_LEN = 20;
  43
  44 _DeviceKeyGenerator::_DeviceKeyGenerator(void)
  45 {
  46
  47 }
  48
  49 _DeviceKeyGenerator::~_DeviceKeyGenerator(void)
  50 {
  51
  52 }
  53
  54 ISecretKey*
  55 _DeviceKeyGenerator::GenerateDeviceKeyN(int keySize)
  56 {
  57         result r = E_SUCCESS;
  58         String deviceInfo;
  59         ByteBuffer deviceInfoBuffer;
  60         std::unique_ptr <ByteBuffer> pHashValue(null);
  61         std::unique_ptr <ISecretKey> pKey(null);
  62         ByteBuffer* pTempValue = null;
  63         ByteBuffer* pTempInfoBuffer = null;
  64         Sha1Hash hash;
  65         int count = 0;
  66         char* pDeviceInfo = null;
  67
  68         SysLog(NID_SEC, "GenerateDeviceKeyN called.");
  69
  70         SysTryReturn(NID_SEC, keySize > 0, null, E_INVALID_ARG,
  71                                 "[E_INVALID_ARG] The device key size MUST be a valid integer greater than 0.");
  72         deviceInfo.Append(L"1234567890abcdefghijklmnopqrstuvwxyz");
  73         if (keySize % _HASH_LEN == 0)
  74         {
  75                 count = keySize / _HASH_LEN;
  76         }
  77         else
  78         {
  79                 count = keySize / _HASH_LEN + 1;
  80         }
  81
  82         pHashValue.reset(new (std::nothrow) ByteBuffer());
  83         SysTryReturn(NID_SEC, pHashValue != null, null, r = E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
  84         r = pHashValue->Construct(count * _HASH_LEN);
  85         SysTryReturn(NID_SEC, r == E_SUCCESS, null, r = E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
  86
  87         pDeviceInfo = _StringConverter::CopyToCharArrayN(deviceInfo);
  88         deviceInfoBuffer.Construct(deviceInfo.GetLength());
  89         deviceInfoBuffer.SetArray(reinterpret_cast <byte*>(pDeviceInfo), 0, deviceInfo.GetLength());
  90         deviceInfoBuffer.Flip();
  91         delete[] pDeviceInfo;
  92
  93         for (int i = 0; i < count; i++)
  94         {
  95                 if (i == 0)
  96                 {
  97                         pTempValue = hash.GetHashN(deviceInfoBuffer);
  98                 }
  99                 else
 100                 {
 101                         pTempValue = hash.GetHashN(*pTempInfoBuffer);
 102                 }
 103                 SysTryCatch(NID_SEC, pTempValue != null, , GetLastResult(), "[%s] Failed to generate hash code.",
 104                                    GetErrorMessage(GetLastResult()));
 105
 106                 if (pTempInfoBuffer != null)
 107                         delete pTempInfoBuffer;
 108                 pTempInfoBuffer = new (std::nothrow) ByteBuffer();
 109                 r = pTempInfoBuffer->Construct(*pTempValue);
 110                 delete pTempValue;
 111                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 112                 r = pHashValue->CopyFrom(*pTempInfoBuffer);
 113                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 114         }
 115
 116         pHashValue->Flip();
 117         pHashValue->SetLimit(keySize);
 118         pKey.reset(new (std::nothrow) SecretKey());
 119         SysTryCatch(NID_SEC, pKey != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
 120         r = pKey->SetKey(*(pHashValue.get()));
 121         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] Failed to generate device unique key.", GetErrorMessage(r));
 122
 123 CATCH:
 124         SetLastResult(r);
 125         delete pTempInfoBuffer;
 126
 127         return pKey.release();
 128 }
 129
 130 ISecretKey*
 131 _DeviceKeyGenerator::GenerateDeviceKeyN(String& appId, int keySize)
 132 {
 133         result r = E_SUCCESS;
 134         String deviceInfo;
 135         ByteBuffer deviceInfoBuffer;
 136         std::unique_ptr <ByteBuffer> pHashValue(null);
 137         std::unique_ptr <ByteBuffer> pHmacKey(null);
 138         std::unique_ptr <ISecretKey> pSecretKey(null);
 139         std::unique_ptr <ISecretKey> pKey(null);
 140         ByteBuffer* pTempValue = null;
 141         ByteBuffer* pTempInfoBuffer = null;
 142         Sha1Hmac hmac;
 143         int count = 0;
 144         char* pDeviceInfo = null;
 145
 146         SysLog(NID_SEC, "GenerateDeviceKeyN called.");
 147
 148         SysTryReturn(NID_SEC, keySize > 0 && appId.GetLength() > 0, null, E_INVALID_ARG,
 149                                 "[E_INVALID_ARG] The device key size MUST be a valid integer greater than 0.");
 150
 151 //ToDo
 152 //Add slp API
 153
 154         deviceInfo.Append(L"1234567890abcdefghijklmnopqrstuvwxyz");
 155         if (keySize % _HASH_LEN == 0)
 156         {
 157                 count = keySize / _HASH_LEN;
 158         }
 159         else
 160         {
 161                 count = keySize / _HASH_LEN + 1;
 162         }
 163
 164         pHashValue.reset(new (std::nothrow) ByteBuffer());
 165         SysTryReturn(NID_SEC, pHashValue != null, null, r = E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
 166         r = pHashValue->Construct(count * _HASH_LEN);
 167         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 168
 169         pDeviceInfo = _StringConverter::CopyToCharArrayN(deviceInfo);
 170         deviceInfoBuffer.Construct(deviceInfo.GetLength());
 171         deviceInfoBuffer.SetArray(reinterpret_cast <byte*>(pDeviceInfo), 0, deviceInfo.GetLength());
 172         deviceInfoBuffer.Flip();
 173         delete[] pDeviceInfo;
 174
 175         pHmacKey.reset(StringUtil::StringToUtf8N(appId));
 176
 177         pSecretKey.reset(new (std::nothrow) SecretKey());
 178         r = pSecretKey->SetKey(*(pHmacKey.get()));
 179         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 180         hmac.SetKey(*(pSecretKey.get()));
 181
 182         for (int i = 0; i < count; i++)
 183         {
 184                 if (i == 0)
 185                 {
 186                         pTempValue = hmac.GetHmacN(deviceInfoBuffer);
 187                 }
 188                 else
 189                 {
 190                         pTempValue = hmac.GetHmacN(*pTempInfoBuffer);
 191                 }
 192                 SysTryCatch(NID_SEC, pTempValue != null, , GetLastResult(), "[%s] Failed to generate hash code.",
 193                                    GetErrorMessage(GetLastResult()));
 194
 195                 if (pTempInfoBuffer != null)
 196                         delete pTempInfoBuffer;
 197                 pTempInfoBuffer = new (std::nothrow) ByteBuffer();
 198                 r = pTempInfoBuffer->Construct(*pTempValue);
 199                 delete pTempValue;
 200                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 201                 r = pHashValue->CopyFrom(*pTempInfoBuffer);
 202                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 203         }
 204
 205         pHashValue->Flip();
 206         pHashValue->SetLimit(keySize);
 207         pKey.reset(new (std::nothrow) SecretKey());
 208         SysTryCatch(NID_SEC, pKey != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
 209         r = pKey->SetKey(*(pHashValue.get()));
 210         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] Failed to generate device unique key.", GetErrorMessage(r));
 211
 212 CATCH:
 213         SetLastResult(r);
 214         delete pTempInfoBuffer;
 215
 216         return pKey.release();
 217 }
 218
 219 } //Tizen::Security
 220 } //Osp