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 //** Introduction
36 //
37 // The functions in this file are used for initialization of the interface to the
38 // OpenSSL library.
39
40 //** Defines and Includes
41
42 #include "Tpm.h"
43
44 #if (defined SYM_LIB_OSSL) && ALG_TDES
45
46 //**Functions
47 //*** TDES_set_encyrpt_key()
48 // This function makes creation of a TDES key look like the creation of a key for
49 // any of the other OpenSSL block ciphers. It will create three key schedules,
50 // one for each of the DES keys. If there are only two keys, then the third schedule
51 // is a copy of the first.
52 void
TDES_set_encrypt_key(const BYTE * key,UINT16 keySizeInBits,tpmKeyScheduleTDES * keySchedule)53 TDES_set_encrypt_key(
54 const BYTE *key,
55 UINT16 keySizeInBits,
56 tpmKeyScheduleTDES *keySchedule
57 )
58 {
59 DES_set_key_unchecked((const_DES_cblock *)key, &keySchedule[0]);
60 DES_set_key_unchecked((const_DES_cblock *)&key[8], &keySchedule[1]);
61 // If is two-key, copy the schedule for K1 into K3, otherwise, compute the
62 // the schedule for K3
63 if(keySizeInBits == 128)
64 keySchedule[2] = keySchedule[0];
65 else
66 DES_set_key_unchecked((const_DES_cblock *)&key[16],
67 &keySchedule[2]);
68 }
69
70
71 //*** TDES_encyrpt()
72 // The TPM code uses one key schedule. For TDES, the schedule contains three
73 // schedules. OpenSSL wants the schedules referenced separately. This function
74 // does that.
TDES_encrypt(const BYTE * in,BYTE * out,tpmKeyScheduleTDES * ks)75 void TDES_encrypt(
76 const BYTE *in,
77 BYTE *out,
78 tpmKeyScheduleTDES *ks
79 )
80 {
81 DES_ecb3_encrypt((const_DES_cblock *)in, (DES_cblock *)out,
82 &ks[0], &ks[1], &ks[2],
83 DES_ENCRYPT);
84 }
85
86 //*** TDES_decrypt()
87 // As with TDES_encypt() this function bridges between the TPM single schedule
88 // model and the OpenSSL three schedule model.
TDES_decrypt(const BYTE * in,BYTE * out,tpmKeyScheduleTDES * ks)89 void TDES_decrypt(
90 const BYTE *in,
91 BYTE *out,
92 tpmKeyScheduleTDES *ks
93 )
94 {
95 DES_ecb3_encrypt((const_DES_cblock *)in, (DES_cblock *)out,
96 &ks[0], &ks[1], &ks[2],
97 DES_DECRYPT);
98 }
99
100 #endif // SYM_LIB_OSSL
101