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 "ECC_Decrypt_fp.h"
37 #include "CryptEccCrypt_fp.h"
38
39 #if CC_ECC_Decrypt // Conditional expansion of this file
40
41 // Return Type: TPM_RC
42 // TPM_RC_ATTRIBUTES key referenced by 'keyHandle' is restricted
43 // TPM_RC_KEY keyHandle does not reference an ECC key
44 // TPM_RC_NO_RESULT internal error in big number processing
45 // TPM_RC_SCHEME bad scheme
46 // TPM_RC_VALUE C3 did not match hash of recovered data
47 TPM_RC
TPM2_ECC_Decrypt(ECC_Decrypt_In * in,ECC_Decrypt_Out * out)48 TPM2_ECC_Decrypt(
49 ECC_Decrypt_In *in, // IN: input parameter list
50 ECC_Decrypt_Out *out // OUT: output parameter list
51 )
52 {
53 OBJECT *key = HandleToObject(in->keyHandle);
54 // Parameter validation
55 // Must be the correct type of key with correct attributes
56 if (key->publicArea.type != TPM_ALG_ECC)
57 return TPM_RC_KEY + RC_ECC_Decrypt_keyHandle;
58 if (IS_ATTRIBUTE(key->publicArea.objectAttributes, TPMA_OBJECT, restricted)
59 || !IS_ATTRIBUTE(key->publicArea.objectAttributes, TPMA_OBJECT, decrypt))
60 return TPM_RCS_ATTRIBUTES + RC_ECC_Decrypt_keyHandle;
61 // Have to have a scheme selected
62 if(!CryptEccSelectScheme(key, &in->inScheme))
63 return TPM_RCS_SCHEME + RC_ECC_Decrypt_inScheme;
64 // Command Output
65 return CryptEccDecrypt(key, &in->inScheme, &out->plainText,
66 &in->C1.point, &in->C2, &in->C3);
67 }
68
69 #endif // CC_ECC_Decrypt