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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/** @file
LZMA Decompress GUIDed Section Extraction Library.
It wraps Lzma decompress interfaces to GUIDed Section Extraction interfaces
and registers them into GUIDed handler table.
Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
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.
**/
#include "LzmaDecompressLibInternal.h"
/**
Examines a GUIDed section and returns the size of the decoded buffer and the
size of an scratch buffer required to actually decode the data in a GUIDed section.
Examines a GUIDed section specified by InputSection.
If GUID for InputSection does not match the GUID that this handler supports,
then RETURN_UNSUPPORTED is returned.
If the required information can not be retrieved from InputSection,
then RETURN_INVALID_PARAMETER is returned.
If the GUID of InputSection does match the GUID that this handler supports,
then the size required to hold the decoded buffer is returned in OututBufferSize,
the size of an optional scratch buffer is returned in ScratchSize, and the Attributes field
from EFI_GUID_DEFINED_SECTION header of InputSection is returned in SectionAttribute.
If InputSection is NULL, then ASSERT().
If OutputBufferSize is NULL, then ASSERT().
If ScratchBufferSize is NULL, then ASSERT().
If SectionAttribute is NULL, then ASSERT().
@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required
if the buffer specified by InputSection were decoded.
@param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space
if the buffer specified by InputSection were decoded.
@param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes
field of EFI_GUID_DEFINED_SECTION in the PI Specification.
@retval RETURN_SUCCESS The information about InputSection was returned.
@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The information can not be retrieved from the section specified by InputSection.
**/
RETURN_STATUS
EFIAPI
LzmaGuidedSectionGetInfo (
IN CONST VOID *InputSection,
OUT UINT32 *OutputBufferSize,
OUT UINT32 *ScratchBufferSize,
OUT UINT16 *SectionAttribute
)
{
ASSERT (InputSection != NULL);
ASSERT (OutputBufferSize != NULL);
ASSERT (ScratchBufferSize != NULL);
ASSERT (SectionAttribute != NULL);
if (!CompareGuid (
&gLzmaCustomDecompressGuid,
&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
return RETURN_INVALID_PARAMETER;
}
*SectionAttribute = ((EFI_GUID_DEFINED_SECTION *) InputSection)->Attributes;
return LzmaUefiDecompressGetInfo (
(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
OutputBufferSize,
ScratchBufferSize
);
}
/**
Decompress a LZAM compressed GUIDed section into a caller allocated output buffer.
Decodes the GUIDed section specified by InputSection.
If GUID for InputSection does not match the GUID that this handler supports, then RETURN_UNSUPPORTED is returned.
If the data in InputSection can not be decoded, then RETURN_INVALID_PARAMETER is returned.
If the GUID of InputSection does match the GUID that this handler supports, then InputSection
is decoded into the buffer specified by OutputBuffer and the authentication status of this
decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the
data in InputSection, then OutputBuffer is set to point at the data in InputSection. Otherwise,
the decoded data will be placed in caller allocated buffer specified by OutputBuffer.
If InputSection is NULL, then ASSERT().
If OutputBuffer is NULL, then ASSERT().
If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT().
If AuthenticationStatus is NULL, then ASSERT().
@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
@param[out] ScratchBuffer A caller allocated buffer that may be required by this function
as a scratch buffer to perform the decode operation.
@param[out] AuthenticationStatus
A pointer to the authentication status of the decoded output buffer.
See the definition of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI
section of the PI Specification. EFI_AUTH_STATUS_PLATFORM_OVERRIDE must
never be set by this handler.
@retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
**/
RETURN_STATUS
EFIAPI
LzmaGuidedSectionExtraction (
IN CONST VOID *InputSection,
OUT VOID **OutputBuffer,
OUT VOID *ScratchBuffer, OPTIONAL
OUT UINT32 *AuthenticationStatus
)
{
ASSERT (OutputBuffer != NULL);
ASSERT (InputSection != NULL);
if (!CompareGuid (
&gLzmaCustomDecompressGuid,
&(((EFI_GUID_DEFINED_SECTION *) InputSection)->SectionDefinitionGuid))) {
return RETURN_INVALID_PARAMETER;
}
//
// Authentication is set to Zero, which may be ignored.
//
*AuthenticationStatus = 0;
return LzmaUefiDecompress (
(UINT8 *) InputSection + ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
SECTION_SIZE (InputSection) - ((EFI_GUID_DEFINED_SECTION *) InputSection)->DataOffset,
*OutputBuffer,
ScratchBuffer
);
}
/**
Register LzmaDecompress and LzmaDecompressGetInfo handlers with LzmaCustomerDecompressGuid.
@retval RETURN_SUCCESS Register successfully.
@retval RETURN_OUT_OF_RESOURCES No enough memory to store this handler.
**/
EFI_STATUS
EFIAPI
LzmaDecompressLibConstructor (
)
{
return ExtractGuidedSectionRegisterHandlers (
&gLzmaCustomDecompressGuid,
LzmaGuidedSectionGetInfo,
LzmaGuidedSectionExtraction
);
}
|
