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         r = deviceInfoBuffer.SetArray(reinterpret_cast <byte*>(pDeviceInfo), 0, deviceInfo.GetLength());
  90         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
  91         deviceInfoBuffer.Flip();
  92         delete[] pDeviceInfo;
  93
  94         for (int i = 0; i < count; i++)
  95         {
  96                 if (i == 0)
  97                 {
  98                         pTempValue = hash.GetHashN(deviceInfoBuffer);
  99                 }
 100                 else
 101                 {
 102                         pTempValue = hash.GetHashN(*pTempInfoBuffer);
 103                 }
 104                 SysTryCatch(NID_SEC, pTempValue != null, , GetLastResult(), "[%s] Failed to generate hash code.",
 105                                    GetErrorMessage(GetLastResult()));
 106
 107                 if (pTempInfoBuffer != null)
 108                         delete pTempInfoBuffer;
 109                 pTempInfoBuffer = new (std::nothrow) ByteBuffer();
 110                 r = pTempInfoBuffer->Construct(*pTempValue);
 111                 delete pTempValue;
 112                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 113                 r = pHashValue->CopyFrom(*pTempInfoBuffer);
 114                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 115         }
 116
 117         pHashValue->Flip();
 118         pHashValue->SetLimit(keySize);
 119         pKey.reset(new (std::nothrow) SecretKey());
 120         SysTryCatch(NID_SEC, pKey != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
 121         r = pKey->SetKey(*(pHashValue.get()));
 122         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] Failed to generate device unique key.", GetErrorMessage(r));
 123
 124 CATCH:
 125         SetLastResult(r);
 126         delete pTempInfoBuffer;
 127
 128         return pKey.release();
 129 }
 130
 131 ISecretKey*
 132 _DeviceKeyGenerator::GenerateDeviceKeyN(String& appId, int keySize)
 133 {
 134         result r = E_SUCCESS;
 135         String deviceInfo;
 136         ByteBuffer deviceInfoBuffer;
 137         std::unique_ptr <ByteBuffer> pHashValue(null);
 138         std::unique_ptr <ByteBuffer> pHmacKey(null);
 139         std::unique_ptr <ISecretKey> pSecretKey(null);
 140         std::unique_ptr <ISecretKey> pKey(null);
 141         ByteBuffer* pTempValue = null;
 142         ByteBuffer* pTempInfoBuffer = null;
 143         Sha1Hmac hmac;
 144         int count = 0;
 145         char* pDeviceInfo = null;
 146
 147         SysLog(NID_SEC, "GenerateDeviceKeyN called.");
 148
 149         SysTryReturn(NID_SEC, keySize > 0 && appId.GetLength() > 0, null, E_INVALID_ARG,
 150                                 "[E_INVALID_ARG] The device key size MUST be a valid integer greater than 0.");
 151
 152 //ToDo
 153 //Add slp API
 154
 155         deviceInfo.Append(L"1234567890abcdefghijklmnopqrstuvwxyz");
 156         if (keySize % _HASH_LEN == 0)
 157         {
 158                 count = keySize / _HASH_LEN;
 159         }
 160         else
 161         {
 162                 count = keySize / _HASH_LEN + 1;
 163         }
 164
 165         pHashValue.reset(new (std::nothrow) ByteBuffer());
 166         SysTryReturn(NID_SEC, pHashValue != null, null, r = E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
 167         r = pHashValue->Construct(count * _HASH_LEN);
 168         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 169
 170         pDeviceInfo = _StringConverter::CopyToCharArrayN(deviceInfo);
 171         deviceInfoBuffer.Construct(deviceInfo.GetLength());
 172         r = deviceInfoBuffer.SetArray(reinterpret_cast <byte*>(pDeviceInfo), 0, deviceInfo.GetLength());
 173         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 174         deviceInfoBuffer.Flip();
 175         delete[] pDeviceInfo;
 176
 177         pHmacKey.reset(StringUtil::StringToUtf8N(appId));
 178
 179         pSecretKey.reset(new (std::nothrow) SecretKey());
 180         r = pSecretKey->SetKey(*(pHmacKey.get()));
 181         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 182         hmac.SetKey(*(pSecretKey.get()));
 183
 184         for (int i = 0; i < count; i++)
 185         {
 186                 if (i == 0)
 187                 {
 188                         pTempValue = hmac.GetHmacN(deviceInfoBuffer);
 189                 }
 190                 else
 191                 {
 192                         pTempValue = hmac.GetHmacN(*pTempInfoBuffer);
 193                 }
 194                 SysTryCatch(NID_SEC, pTempValue != null, , GetLastResult(), "[%s] Failed to generate hash code.",
 195                                    GetErrorMessage(GetLastResult()));
 196
 197                 if (pTempInfoBuffer != null)
 198                         delete pTempInfoBuffer;
 199                 pTempInfoBuffer = new (std::nothrow) ByteBuffer();
 200                 r = pTempInfoBuffer->Construct(*pTempValue);
 201                 delete pTempValue;
 202                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 203                 r = pHashValue->CopyFrom(*pTempInfoBuffer);
 204                 SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] A system error has occurred.", GetErrorMessage(r));
 205         }
 206
 207         pHashValue->Flip();
 208         pHashValue->SetLimit(keySize);
 209         pKey.reset(new (std::nothrow) SecretKey());
 210         SysTryCatch(NID_SEC, pKey != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Failed to allocate memory.");
 211         r = pKey->SetKey(*(pHashValue.get()));
 212         SysTryCatch(NID_SEC, r == E_SUCCESS, , r, "[%s] Failed to generate device unique key.", GetErrorMessage(r));
 213
 214 CATCH:
 215         SetLastResult(r);
 216         delete pTempInfoBuffer;
 217
 218         return pKey.release();
 219 }
 220
 221 } //Tizen::Security
 222 } //Osp