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 "RSA_Encrypt_fp.h"
37
38 #if CC_RSA_Encrypt // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // This command performs the padding and encryption of a data block
42 */
43 // Return Type: TPM_RC
44 // TPM_RC_ATTRIBUTES 'decrypt' attribute is not SET in key referenced
45 // by 'keyHandle'
46 // TPM_RC_KEY 'keyHandle' does not reference an RSA key
47 // TPM_RC_SCHEME incorrect input scheme, or the chosen
48 // scheme is not a valid RSA decrypt scheme
49 // TPM_RC_VALUE the numeric value of 'message' is greater than
50 // the public modulus of the key referenced by
51 // 'keyHandle', or 'label' is not a null-terminated
52 // string
53 TPM_RC
TPM2_RSA_Encrypt(RSA_Encrypt_In * in,RSA_Encrypt_Out * out)54 TPM2_RSA_Encrypt(
55 RSA_Encrypt_In *in, // IN: input parameter list
56 RSA_Encrypt_Out *out // OUT: output parameter list
57 )
58 {
59 TPM_RC result;
60 OBJECT *rsaKey;
61 TPMT_RSA_DECRYPT *scheme;
62 // Input Validation
63 rsaKey = HandleToObject(in->keyHandle);
64
65 // selected key must be an RSA key
66 if(rsaKey->publicArea.type != TPM_ALG_RSA)
67 return TPM_RCS_KEY + RC_RSA_Encrypt_keyHandle;
68 // selected key must have the decryption attribute
69 if(!IS_ATTRIBUTE(rsaKey->publicArea.objectAttributes, TPMA_OBJECT, decrypt))
70 return TPM_RCS_ATTRIBUTES + RC_RSA_Encrypt_keyHandle;
71
72 // Is there a label?
73 if(!IsLabelProperlyFormatted(&in->label.b))
74 return TPM_RCS_VALUE + RC_RSA_Encrypt_label;
75 // Command Output
76 // Select a scheme for encryption
77 scheme = CryptRsaSelectScheme(in->keyHandle, &in->inScheme);
78 if(scheme == NULL)
79 return TPM_RCS_SCHEME + RC_RSA_Encrypt_inScheme;
80
81 // Encryption. TPM_RC_VALUE, or TPM_RC_SCHEME errors my be returned buy
82 // CryptEncyptRSA.
83 out->outData.t.size = sizeof(out->outData.t.buffer);
84
85 result = CryptRsaEncrypt(&out->outData, &in->message.b, rsaKey, scheme,
86 &in->label.b, NULL);
87 return result;
88 }
89
90 #endif // CC_RSA_Encrypt