1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Usefuls routines based on the LzmaTest.c file from LZMA SDK 4.65
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2007-2009 Industrie Dial Face S.p.A.
5*4882a593Smuzhiyun * Luigi 'Comio' Mantellini (luigi.mantellini@idf-hit.com)
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (C) 1999-2005 Igor Pavlov
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun /*
13*4882a593Smuzhiyun * LZMA_Alone stream format:
14*4882a593Smuzhiyun *
15*4882a593Smuzhiyun * uchar Properties[5]
16*4882a593Smuzhiyun * uint64 Uncompressed size
17*4882a593Smuzhiyun * uchar data[*]
18*4882a593Smuzhiyun *
19*4882a593Smuzhiyun */
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #include <config.h>
22*4882a593Smuzhiyun #include <common.h>
23*4882a593Smuzhiyun #include <watchdog.h>
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #if CONFIG_IS_ENABLED(LZMA)
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun #define LZMA_PROPERTIES_OFFSET 0
28*4882a593Smuzhiyun #define LZMA_SIZE_OFFSET LZMA_PROPS_SIZE
29*4882a593Smuzhiyun #define LZMA_DATA_OFFSET LZMA_SIZE_OFFSET+sizeof(uint64_t)
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #include "LzmaTools.h"
32*4882a593Smuzhiyun #include "LzmaDec.h"
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #include <linux/string.h>
35*4882a593Smuzhiyun #include <malloc.h>
36*4882a593Smuzhiyun
SzAlloc(void * p,size_t size)37*4882a593Smuzhiyun static void *SzAlloc(void *p, size_t size) { return malloc(size); }
SzFree(void * p,void * address)38*4882a593Smuzhiyun static void SzFree(void *p, void *address) { free(address); }
39*4882a593Smuzhiyun
lzma_is_valid(const unsigned char * buf)40*4882a593Smuzhiyun int lzma_is_valid(const unsigned char *buf)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun if (buf[0] != 0x5d || buf[1] || buf[2])
43*4882a593Smuzhiyun return 0;
44*4882a593Smuzhiyun if (buf[12] && buf[12] != 0xff)
45*4882a593Smuzhiyun return 0;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun return 1;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
lzmaBuffToBuffDecompress(unsigned char * outStream,SizeT * uncompressedSize,unsigned char * inStream,SizeT length)50*4882a593Smuzhiyun int lzmaBuffToBuffDecompress (unsigned char *outStream, SizeT *uncompressedSize,
51*4882a593Smuzhiyun unsigned char *inStream, SizeT length)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun int res = SZ_ERROR_DATA;
54*4882a593Smuzhiyun int i;
55*4882a593Smuzhiyun ISzAlloc g_Alloc;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun SizeT outSizeFull = 0xFFFFFFFF; /* 4GBytes limit */
58*4882a593Smuzhiyun SizeT outProcessed;
59*4882a593Smuzhiyun SizeT outSize;
60*4882a593Smuzhiyun SizeT outSizeHigh;
61*4882a593Smuzhiyun ELzmaStatus state;
62*4882a593Smuzhiyun SizeT compressedSize = (SizeT)(length - LZMA_PROPS_SIZE);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun debug ("LZMA: Image address............... 0x%p\n", inStream);
65*4882a593Smuzhiyun debug ("LZMA: Properties address.......... 0x%p\n", inStream + LZMA_PROPERTIES_OFFSET);
66*4882a593Smuzhiyun debug ("LZMA: Uncompressed size address... 0x%p\n", inStream + LZMA_SIZE_OFFSET);
67*4882a593Smuzhiyun debug ("LZMA: Compressed data address..... 0x%p\n", inStream + LZMA_DATA_OFFSET);
68*4882a593Smuzhiyun debug ("LZMA: Destination address......... 0x%p\n", outStream);
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun memset(&state, 0, sizeof(state));
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun outSize = 0;
73*4882a593Smuzhiyun outSizeHigh = 0;
74*4882a593Smuzhiyun /* Read the uncompressed size */
75*4882a593Smuzhiyun for (i = 0; i < 8; i++) {
76*4882a593Smuzhiyun unsigned char b = inStream[LZMA_SIZE_OFFSET + i];
77*4882a593Smuzhiyun if (i < 4) {
78*4882a593Smuzhiyun outSize += (UInt32)(b) << (i * 8);
79*4882a593Smuzhiyun } else {
80*4882a593Smuzhiyun outSizeHigh += (UInt32)(b) << ((i - 4) * 8);
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun outSizeFull = (SizeT)outSize;
85*4882a593Smuzhiyun if (sizeof(SizeT) >= 8) {
86*4882a593Smuzhiyun /*
87*4882a593Smuzhiyun * SizeT is a 64 bit uint => We can manage files larger than 4GB!
88*4882a593Smuzhiyun *
89*4882a593Smuzhiyun */
90*4882a593Smuzhiyun outSizeFull |= (((SizeT)outSizeHigh << 16) << 16);
91*4882a593Smuzhiyun } else if (outSizeHigh != 0 || (UInt32)(SizeT)outSize != outSize) {
92*4882a593Smuzhiyun /*
93*4882a593Smuzhiyun * SizeT is a 32 bit uint => We cannot manage files larger than
94*4882a593Smuzhiyun * 4GB! Assume however that all 0xf values is "unknown size" and
95*4882a593Smuzhiyun * not actually a file of 2^64 bits.
96*4882a593Smuzhiyun *
97*4882a593Smuzhiyun */
98*4882a593Smuzhiyun if (outSizeHigh != (SizeT)-1 || outSize != (SizeT)-1) {
99*4882a593Smuzhiyun debug ("LZMA: 64bit support not enabled.\n");
100*4882a593Smuzhiyun return SZ_ERROR_DATA;
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun }
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun debug("LZMA: Uncompresed size............ 0x%zx\n", outSizeFull);
105*4882a593Smuzhiyun debug("LZMA: Compresed size.............. 0x%zx\n", compressedSize);
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun g_Alloc.Alloc = SzAlloc;
108*4882a593Smuzhiyun g_Alloc.Free = SzFree;
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun /* Short-circuit early if we know the buffer can't hold the results. */
111*4882a593Smuzhiyun if (outSizeFull != (SizeT)-1 && *uncompressedSize < outSizeFull)
112*4882a593Smuzhiyun return SZ_ERROR_OUTPUT_EOF;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun /* Decompress */
115*4882a593Smuzhiyun outProcessed = min(outSizeFull, *uncompressedSize);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun WATCHDOG_RESET();
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun res = LzmaDecode(
120*4882a593Smuzhiyun outStream, &outProcessed,
121*4882a593Smuzhiyun inStream + LZMA_DATA_OFFSET, &compressedSize,
122*4882a593Smuzhiyun inStream, LZMA_PROPS_SIZE, LZMA_FINISH_END, &state, &g_Alloc);
123*4882a593Smuzhiyun *uncompressedSize = outProcessed;
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun debug("LZMA: Uncompressed ............... 0x%zx\n", outProcessed);
126*4882a593Smuzhiyun
127*4882a593Smuzhiyun if (res != SZ_OK) {
128*4882a593Smuzhiyun return res;
129*4882a593Smuzhiyun }
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun return res;
132*4882a593Smuzhiyun }
133*4882a593Smuzhiyun
134*4882a593Smuzhiyun #endif
135