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/*
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <console.h>
#include <image.h>
#include <malloc.h>
#include <u-boot/zlib.h>
#include <div64.h>
#define HEADER0 '\x1f'
#define HEADER1 '\x8b'
#define ZALLOC_ALIGNMENT 16
#define HEAD_CRC 2
#define EXTRA_FIELD 4
#define ORIG_NAME 8
#define COMMENT 0x10
#define RESERVED 0xe0
#define DEFLATED 8
void *gzalloc(void *x, unsigned items, unsigned size)
{
void *p;
size *= items;
size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
p = malloc (size);
return (p);
}
void gzfree(void *x, void *addr, unsigned nb)
{
free (addr);
}
int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
{
int i, flags;
/* skip header */
i = 10;
flags = src[3];
if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
puts ("Error: Bad gzipped data\n");
return (-1);
}
if ((flags & EXTRA_FIELD) != 0)
i = 12 + src[10] + (src[11] << 8);
if ((flags & ORIG_NAME) != 0)
while (src[i++] != 0)
;
if ((flags & COMMENT) != 0)
while (src[i++] != 0)
;
if ((flags & HEAD_CRC) != 0)
i += 2;
if (i >= *lenp) {
puts ("Error: gunzip out of data in header\n");
return (-1);
}
return zunzip(dst, dstlen, src, lenp, 1, i);
}
__weak
void gzwrite_progress_init(u64 expectedsize)
{
putc('\n');
}
__weak
void gzwrite_progress(int iteration,
u64 bytes_written,
u64 total_bytes)
{
if (0 == (iteration & 3))
printf("%llu/%llu\r", bytes_written, total_bytes);
}
__weak
void gzwrite_progress_finish(int returnval,
u64 bytes_written,
u64 total_bytes,
u32 expected_crc,
u32 calculated_crc)
{
if (0 == returnval) {
printf("\n\t%llu bytes, crc 0x%08x\n",
total_bytes, calculated_crc);
} else {
printf("\n\tuncompressed %llu of %llu\n"
"\tcrcs == 0x%08x/0x%08x\n",
bytes_written, total_bytes,
expected_crc, calculated_crc);
}
}
int gzwrite(unsigned char *src, int len,
struct block_dev_desc *dev,
unsigned long szwritebuf,
u64 startoffs,
u64 szexpected)
{
int i, flags;
z_stream s;
int r = 0;
unsigned char *writebuf;
unsigned crc = 0;
u64 totalfilled = 0;
lbaint_t blksperbuf, outblock;
u32 expected_crc;
u32 payload_size;
int iteration = 0;
if (!szwritebuf ||
(szwritebuf % dev->blksz) ||
(szwritebuf < dev->blksz)) {
printf("%s: size %lu not a multiple of %lu\n",
__func__, szwritebuf, dev->blksz);
return -1;
}
if (startoffs & (dev->blksz-1)) {
printf("%s: start offset %llu not a multiple of %lu\n",
__func__, startoffs, dev->blksz);
return -1;
}
blksperbuf = szwritebuf / dev->blksz;
outblock = lldiv(startoffs, dev->blksz);
/* skip header */
i = 10;
flags = src[3];
if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
puts("Error: Bad gzipped data\n");
return -1;
}
if ((flags & EXTRA_FIELD) != 0)
i = 12 + src[10] + (src[11] << 8);
if ((flags & ORIG_NAME) != 0)
while (src[i++] != 0)
;
if ((flags & COMMENT) != 0)
while (src[i++] != 0)
;
if ((flags & HEAD_CRC) != 0)
i += 2;
if (i >= len-8) {
puts("Error: gunzip out of data in header");
return -1;
}
payload_size = len - i - 8;
memcpy(&expected_crc, src + len - 8, sizeof(expected_crc));
expected_crc = le32_to_cpu(expected_crc);
u32 szuncompressed;
memcpy(&szuncompressed, src + len - 4, sizeof(szuncompressed));
if (szexpected == 0) {
szexpected = le32_to_cpu(szuncompressed);
} else if (szuncompressed != (u32)szexpected) {
printf("size of %llx doesn't match trailer low bits %x\n",
szexpected, szuncompressed);
return -1;
}
if (lldiv(szexpected, dev->blksz) > (dev->lba - outblock)) {
printf("%s: uncompressed size %llu exceeds device size\n",
__func__, szexpected);
return -1;
}
gzwrite_progress_init(szexpected);
s.zalloc = gzalloc;
s.zfree = gzfree;
r = inflateInit2(&s, -MAX_WBITS);
if (r != Z_OK) {
printf("Error: inflateInit2() returned %d\n", r);
return -1;
}
s.next_in = src + i;
s.avail_in = payload_size+8;
writebuf = (unsigned char *)malloc(szwritebuf);
/* decompress until deflate stream ends or end of file */
do {
if (s.avail_in == 0) {
printf("%s: weird termination with result %d\n",
__func__, r);
break;
}
/* run inflate() on input until output buffer not full */
do {
unsigned long blocks_written;
int numfilled;
lbaint_t writeblocks;
s.avail_out = szwritebuf;
s.next_out = writebuf;
r = inflate(&s, Z_SYNC_FLUSH);
if ((r != Z_OK) &&
(r != Z_STREAM_END)) {
printf("Error: inflate() returned %d\n", r);
goto out;
}
numfilled = szwritebuf - s.avail_out;
crc = crc32(crc, writebuf, numfilled);
totalfilled += numfilled;
if (numfilled < szwritebuf) {
writeblocks = (numfilled+dev->blksz-1)
/ dev->blksz;
memset(writebuf+numfilled, 0,
dev->blksz-(numfilled%dev->blksz));
} else {
writeblocks = blksperbuf;
}
gzwrite_progress(iteration++,
totalfilled,
szexpected);
blocks_written = dev->block_write(dev->dev,
outblock,
writeblocks,
writebuf);
outblock += blocks_written;
if (ctrlc()) {
puts("abort\n");
goto out;
}
WATCHDOG_RESET();
} while (s.avail_out == 0);
/* done when inflate() says it's done */
} while (r != Z_STREAM_END);
if ((szexpected != totalfilled) ||
(crc != expected_crc))
r = -1;
else
r = 0;
out:
gzwrite_progress_finish(r, totalfilled, szexpected,
expected_crc, crc);
free(writebuf);
inflateEnd(&s);
return r;
}
/*
* Uncompress blocks compressed with zlib without headers
*/
int zunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp,
int stoponerr, int offset)
{
z_stream s;
int err = 0;
int r;
s.zalloc = gzalloc;
s.zfree = gzfree;
r = inflateInit2(&s, -MAX_WBITS);
if (r != Z_OK) {
printf("Error: inflateInit2() returned %d\n", r);
return -1;
}
s.next_in = src + offset;
s.avail_in = *lenp - offset;
s.next_out = dst;
s.avail_out = dstlen;
do {
r = inflate(&s, Z_FINISH);
if (stoponerr == 1 && r != Z_STREAM_END &&
(s.avail_out == 0 || r != Z_BUF_ERROR)) {
printf("Error: inflate() returned %d\n", r);
err = -1;
break;
}
s.avail_in = *lenp - offset - (int)(s.next_out - (unsigned char*)dst);
} while (r == Z_BUF_ERROR);
*lenp = s.next_out - (unsigned char *) dst;
inflateEnd(&s);
return err;
}