1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*++
Copyright (c) 2004, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Security.h
Abstract:
Security Architectural Protocol as defined in the DXE CIS
Used to provide Security services. Specifically, dependening upon the
authentication state of a discovered driver in a Firmware Volume, the
portable DXE Core Dispatcher will call into the Security Architectural
Protocol (SAP) with the authentication state of the driver.
This call-out allows for OEM-specific policy decisions to be made, such
as event logging for attested boots, locking flash in response to discovering
an unsigned driver or failed signature check, or other exception response.
The SAP can also change system behavior by having the DXE core put a driver
in the Schedule-On-Request (SOR) state. This will allow for later disposition
of the driver by platform agent, such as Platform BDS.
--*/
#ifndef _ARCH_PROTOCOL_SECURITY_H_
#define _ARCH_PROTOCOL_SECURITY_H_
//
// Global ID for the Security Code Architectural Protocol
//
#define EFI_SECURITY_ARCH_PROTOCOL_GUID \
{ 0xA46423E3, 0x4617, 0x49f1, 0xB9, 0xFF, 0xD1, 0xBF, 0xA9, 0x11, 0x58, 0x39 }
EFI_FORWARD_DECLARATION (EFI_SECURITY_ARCH_PROTOCOL);
typedef
EFI_STATUS
(EFIAPI *EFI_SECURITY_FILE_AUTHENTICATION_STATE) (
IN EFI_SECURITY_ARCH_PROTOCOL *This,
IN UINT32 AuthenticationStatus,
IN EFI_DEVICE_PATH_PROTOCOL *File
)
/*++
Routine Description:
The EFI_SECURITY_ARCH_PROTOCOL (SAP) is used to abstract platform-specific
policy from the DXE core response to an attempt to use a file that returns a
given status for the authentication check from the section extraction protocol.
The possible responses in a given SAP implementation may include locking
flash upon failure to authenticate, attestation logging for all signed drivers,
and other exception operations. The File parameter allows for possible logging
within the SAP of the driver.
If File is NULL, then EFI_INVALID_PARAMETER is returned.
If the file specified by File with an authentication status specified by
AuthenticationStatus is safe for the DXE Core to use, then EFI_SUCCESS is returned.
If the file specified by File with an authentication status specified by
AuthenticationStatus is not safe for the DXE Core to use under any circumstances,
then EFI_ACCESS_DENIED is returned.
If the file specified by File with an authentication status specified by
AuthenticationStatus is not safe for the DXE Core to use right now, but it
might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is
returned.
Arguments:
This - The EFI_SECURITY_ARCH_PROTOCOL instance.
AuthenticationStatus - This is the authentication type returned from the Section
Extraction protocol. See the Section Extraction Protocol
Specification for details on this type.
File - This is a pointer to the device path of the file that is
being dispatched. This will optionally be used for logging.
Returns:
EFI_SUCCESS - The file specified by File did authenticate, and the
platform policy dictates that the DXE Core may use File.
EFI_INVALID_PARAMETER - Driver is NULL.
EFI_SECURITY_VIOLATION - The file specified by File did not authenticate, and
the platform policy dictates that File should be placed
in the untrusted state. A file may be promoted from
the untrusted to the trusted state at a future time
with a call to the Trust() DXE Service.
EFI_ACCESS_DENIED - The file specified by File did not authenticate, and
the platform policy dictates that File should not be
used for any purpose.
--*/
;
//
// Interface stucture for the Timer Architectural Protocol
//
typedef struct _EFI_SECURITY_ARCH_PROTOCOL {
EFI_SECURITY_FILE_AUTHENTICATION_STATE FileAuthenticationState;
} EFI_SECURITY_ARCH_PROTOCOL;
/*++
Protocol Description:
The EFI_SECURITY_ARCH_PROTOCOL is used to abstract platform-specific policy
from the DXE core. This includes locking flash upon failure to authenticate,
attestation logging, and other exception operations.
The driver that produces the EFI_SECURITY_ARCH_PROTOCOL may also optionally
install the EFI_SECURITY_POLICY_PROTOCOL_GUID onto a new handle with a NULL
interface. The existence of this GUID in the protocol database means that
the GUIDed Section Extraction Protocol should authenticate the contents of
an Authentication Section. The expectation is that the GUIDed Section
Extraction protocol will look for the existence of the EFI_SECURITY_POLICY_
PROTOCOL_GUID in the protocol database. If it exists, then the publication
thereof is taken as an injunction to attempt an authentication of any section
wrapped in an Authentication Section. See the Firmware File System
Specification for details on the GUIDed Section Extraction Protocol and
Authentication Sections.
Parameters:
FileAuthenticationState - This service is called upon fault with respect to
the authentication of a section of a file.
--*/
extern EFI_GUID gEfiSecurityArchProtocolGuid;
#endif
|
