1 /* Microsoft Reference Implementation for TPM 2.0
2 *
3 * The copyright in this software is being made available under the BSD License,
4 * included below. This software may be subject to other third party and
5 * contributor rights, including patent rights, and no such rights are granted
6 * under this license.
7 *
8 * Copyright (c) Microsoft Corporation
9 *
10 * All rights reserved.
11 *
12 * BSD License
13 *
14 * Redistribution and use in source and binary forms, with or without modification,
15 * are permitted provided that the following conditions are met:
16 *
17 * Redistributions of source code must retain the above copyright notice, this list
18 * of conditions and the following disclaimer.
19 *
20 * Redistributions in binary form must reproduce the above copyright notice, this
21 * list of conditions and the following disclaimer in the documentation and/or
22 * other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
31 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include "Tpm.h"
36 #include "_TPM_Init_fp.h"
37
38 // This function is used to process a _TPM_Init indication.
39 LIB_EXPORT void
_TPM_Init(void)40 _TPM_Init(
41 void
42 )
43 {
44 g_powerWasLost = g_powerWasLost | _plat__WasPowerLost();
45
46 #if SIMULATION && DEBUG
47 // If power was lost and this was a simulation, put canary in RAM used by NV
48 // so that uninitialized memory can be detected more easily
49 if(g_powerWasLost)
50 {
51 memset(&gc, 0xbb, sizeof(gc));
52 memset(&gr, 0xbb, sizeof(gr));
53 memset(&gp, 0xbb, sizeof(gp));
54 memset(&go, 0xbb, sizeof(go));
55 }
56 #endif
57
58 #if SIMULATION
59 // Clear the flag that forces failure on self-test
60 g_forceFailureMode = FALSE;
61 #endif
62
63 // Disable the tick processing
64 _plat__ACT_EnableTicks(FALSE);
65
66 // Set initialization state
67 TPMInit();
68
69 // Set g_DRTMHandle as unassigned
70 g_DRTMHandle = TPM_RH_UNASSIGNED;
71
72 // No H-CRTM, yet.
73 g_DrtmPreStartup = FALSE;
74
75 // Initialize the NvEnvironment.
76 g_nvOk = NvPowerOn();
77
78 // Initialize cryptographic functions
79 g_inFailureMode = (CryptInit() == FALSE);
80 if(!g_inFailureMode)
81 {
82 // Load the persistent data
83 NvReadPersistent();
84
85 // Load the orderly data (clock and DRBG state).
86 // If this is not done here, things break
87 NvRead(&go, NV_ORDERLY_DATA, sizeof(go));
88
89 // Start clock. Need to do this after NV has been restored.
90 TimePowerOn();
91 }
92 return;
93 }