[people/ms/u-boot.git] / lib / gunzip.c

/*
 * (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 <memalign.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 gzip_parse_header(const unsigned char *src, unsigned long len)
{
	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 >= len) {
		puts ("Error: gunzip out of data in header\n");
		return (-1);
	}
	return i;
}

int gunzip(void *dst, int dstlen, unsigned char *src, unsigned long *lenp)
{
	int offset = gzip_parse_header(src, *lenp);

	if (offset < 0)
		return offset;

	return zunzip(dst, dstlen, src, lenp, 1, offset);
}

#ifdef CONFIG_CMD_UNZIP
__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 blk_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_cache_aligned(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 = blk_dwrite(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;
}
#endif

/*
 * 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_in == 0 || s.avail_out == 0 || r != Z_BUF_ERROR)) {
			printf("Error: inflate() returned %d\n", r);
			err = -1;
			break;
		}
	} while (r == Z_BUF_ERROR);
	*lenp = s.next_out - (unsigned char *) dst;
	inflateEnd(&s);

	return err;
}
Commit	Line	Data
321359f2 MB	1	/*
	2	* (C) Copyright 2000-2006
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
1a459660	5	* SPDX-License-Identifier: GPL-2.0+
321359f2 MB	6	*/
	7
	8	#include <common.h>
	9	#include <watchdog.h>
	10	#include <command.h>
24b852a7	11	#include <console.h>
321359f2 MB	12	#include <image.h>
321359f2 MB	13	#include <malloc.h>
d025021e	14	#include <memalign.h>
a31e091a	15	#include <u-boot/zlib.h>
918e9ebb	16	#include <div64.h>
321359f2	17
918e9ebb EN	18	#define HEADER0 '\x1f'
918e9ebb EN	19	#define HEADER1 '\x8b'
321359f2 MB	20	#define ZALLOC_ALIGNMENT 16
	21	#define HEAD_CRC 2
	22	#define EXTRA_FIELD 4
	23	#define ORIG_NAME 8
	24	#define COMMENT 0x10
	25	#define RESERVED 0xe0
	26	#define DEFLATED 8
	27
e3ed0575	28	void gzalloc(void x, unsigned items, unsigned size)
321359f2 MB	29	{
	30	void *p;
	31
	32	size *= items;
	33	size = (size + ZALLOC_ALIGNMENT - 1) & ~(ZALLOC_ALIGNMENT - 1);
	34
	35	p = malloc (size);
	36
	37	return (p);
	38	}
	39
e3ed0575	40	void gzfree(void x, void addr, unsigned nb)
321359f2 MB	41	{
	42	free (addr);
	43	}
	44
376ddf9d	45	int gzip_parse_header(const unsigned char *src, unsigned long len)
321359f2	46	{
35f6a943	47	int i, flags;
321359f2 MB	48
	49	/* skip header */
	50	i = 10;
	51	flags = src[3];
	52	if (src[2] != DEFLATED \|\| (flags & RESERVED) != 0) {
	53	puts ("Error: Bad gzipped data\n");
	54	return (-1);
	55	}
	56	if ((flags & EXTRA_FIELD) != 0)
	57	i = 12 + src[10] + (src[11] << 8);
	58	if ((flags & ORIG_NAME) != 0)
	59	while (src[i++] != 0)
	60	;
	61	if ((flags & COMMENT) != 0)
	62	while (src[i++] != 0)
	63	;
	64	if ((flags & HEAD_CRC) != 0)
	65	i += 2;
376ddf9d	66	if (i >= len) {
321359f2 MB	67	puts ("Error: gunzip out of data in header\n");
	68	return (-1);
	69	}
376ddf9d JJH	70	return i;
	71	}
	72
	73	int gunzip(void dst, int dstlen, unsigned char src, unsigned long *lenp)
	74	{
	75	int offset = gzip_parse_header(src, *lenp);
	76
	77	if (offset < 0)
	78	return offset;
321359f2	79
376ddf9d	80	return zunzip(dst, dstlen, src, lenp, 1, offset);
35f6a943 RR	81	}
35f6a943 RR	82
1811b7d3	83	#ifdef CONFIG_CMD_UNZIP
918e9ebb EN	84	__weak
	85	void gzwrite_progress_init(u64 expectedsize)
	86	{
	87	putc('\n');
	88	}
	89
	90	__weak
	91	void gzwrite_progress(int iteration,
	92	u64 bytes_written,
	93	u64 total_bytes)
	94	{
	95	if (0 == (iteration & 3))
	96	printf("%llu/%llu\r", bytes_written, total_bytes);
	97	}
	98
	99	__weak
	100	void gzwrite_progress_finish(int returnval,
	101	u64 bytes_written,
	102	u64 total_bytes,
	103	u32 expected_crc,
	104	u32 calculated_crc)
	105	{
	106	if (0 == returnval) {
	107	printf("\n\t%llu bytes, crc 0x%08x\n",
	108	total_bytes, calculated_crc);
	109	} else {
	110	printf("\n\tuncompressed %llu of %llu\n"
	111	"\tcrcs == 0x%08x/0x%08x\n",
	112	bytes_written, total_bytes,
	113	expected_crc, calculated_crc);
	114	}
	115	}
	116
	117	int gzwrite(unsigned char *src, int len,
4101f687	118	struct blk_desc *dev,
918e9ebb EN	119	unsigned long szwritebuf,
	120	u64 startoffs,
	121	u64 szexpected)
	122	{
	123	int i, flags;
	124	z_stream s;
	125	int r = 0;
	126	unsigned char *writebuf;
	127	unsigned crc = 0;
	128	u64 totalfilled = 0;
	129	lbaint_t blksperbuf, outblock;
	130	u32 expected_crc;
	131	u32 payload_size;
	132	int iteration = 0;
	133
	134	if (!szwritebuf \|\|
	135	(szwritebuf % dev->blksz) \|\|
	136	(szwritebuf < dev->blksz)) {
	137	printf("%s: size %lu not a multiple of %lu\n",
	138	__func__, szwritebuf, dev->blksz);
	139	return -1;
	140	}
	141
	142	if (startoffs & (dev->blksz-1)) {
	143	printf("%s: start offset %llu not a multiple of %lu\n",
	144	__func__, startoffs, dev->blksz);
	145	return -1;
	146	}
	147
	148	blksperbuf = szwritebuf / dev->blksz;
	149	outblock = lldiv(startoffs, dev->blksz);
	150
	151	/* skip header */
	152	i = 10;
	153	flags = src[3];
	154	if (src[2] != DEFLATED \|\| (flags & RESERVED) != 0) {
	155	puts("Error: Bad gzipped data\n");
	156	return -1;
	157	}
	158	if ((flags & EXTRA_FIELD) != 0)
	159	i = 12 + src[10] + (src[11] << 8);
	160	if ((flags & ORIG_NAME) != 0)
	161	while (src[i++] != 0)
	162	;
	163	if ((flags & COMMENT) != 0)
	164	while (src[i++] != 0)
	165	;
	166	if ((flags & HEAD_CRC) != 0)
	167	i += 2;
	168
	169	if (i >= len-8) {
	170	puts("Error: gunzip out of data in header");
	171	return -1;
	172	}
	173
	174	payload_size = len - i - 8;
	175
	176	memcpy(&expected_crc, src + len - 8, sizeof(expected_crc));
	177	expected_crc = le32_to_cpu(expected_crc);
	178	u32 szuncompressed;
	179	memcpy(&szuncompressed, src + len - 4, sizeof(szuncompressed));
	180	if (szexpected == 0) {
	181	szexpected = le32_to_cpu(szuncompressed);
	182	} else if (szuncompressed != (u32)szexpected) {
183	printf("size of %llx doesn't match trailer low bits %x\n",
184	szexpected, szuncompressed);
185	return -1;
186	}
187	if (lldiv(szexpected, dev->blksz) > (dev->lba - outblock)) {
188	printf("%s: uncompressed size %llu exceeds device size\n",
189	__func__, szexpected);
190	return -1;
191	}
192
193	gzwrite_progress_init(szexpected);
194
195	s.zalloc = gzalloc;
196	s.zfree = gzfree;
197
198	r = inflateInit2(&s, -MAX_WBITS);
199	if (r != Z_OK) {
200	printf("Error: inflateInit2() returned %d\n", r);
201	return -1;
202	}
203
204	s.next_in = src + i;
205	s.avail_in = payload_size+8;
d025021e	206	writebuf = (unsigned char *)malloc_cache_aligned(szwritebuf);
918e9ebb EN	207
	208	/* decompress until deflate stream ends or end of file */
	209	do {
	210	if (s.avail_in == 0) {
	211	printf("%s: weird termination with result %d\n",
	212	__func__, r);
	213	break;
	214	}
	215
	216	/* run inflate() on input until output buffer not full */
	217	do {
	218	unsigned long blocks_written;
	219	int numfilled;
	220	lbaint_t writeblocks;
	221
	222	s.avail_out = szwritebuf;
	223	s.next_out = writebuf;
	224	r = inflate(&s, Z_SYNC_FLUSH);
	225	if ((r != Z_OK) &&
	226	(r != Z_STREAM_END)) {
	227	printf("Error: inflate() returned %d\n", r);
	228	goto out;
	229	}
	230	numfilled = szwritebuf - s.avail_out;
	231	crc = crc32(crc, writebuf, numfilled);
	232	totalfilled += numfilled;
	233	if (numfilled < szwritebuf) {
	234	writeblocks = (numfilled+dev->blksz-1)
	235	/ dev->blksz;
	236	memset(writebuf+numfilled, 0,
	237	dev->blksz-(numfilled%dev->blksz));
	238	} else {
	239	writeblocks = blksperbuf;
	240	}
	241
	242	gzwrite_progress(iteration++,
	243	totalfilled,
	244	szexpected);
6a3bf3e5 EN	245	blocks_written = blk_dwrite(dev, outblock,
6a3bf3e5 EN	246	writeblocks, writebuf);
918e9ebb EN	247	outblock += blocks_written;
	248	if (ctrlc()) {
	249	puts("abort\n");
	250	goto out;
	251	}
	252	WATCHDOG_RESET();
	253	} while (s.avail_out == 0);
	254	/* done when inflate() says it's done */
	255	} while (r != Z_STREAM_END);
	256
	257	if ((szexpected != totalfilled) \|\|
	258	(crc != expected_crc))
	259	r = -1;
	260	else
	261	r = 0;
	262
	263	out:
	264	gzwrite_progress_finish(r, totalfilled, szexpected,
	265	expected_crc, crc);
	266	free(writebuf);
	267	inflateEnd(&s);
	268
	269	return r;
	270	}
1811b7d3	271	#endif
918e9ebb	272
35f6a943 RR	273	/*
	274	* Uncompress blocks compressed with zlib without headers
	275	*/
	276	int zunzip(void dst, int dstlen, unsigned char src, unsigned long *lenp,
	277	int stoponerr, int offset)
	278	{
	279	z_stream s;
9c55c54f	280	int err = 0;
35f6a943 RR	281	int r;
35f6a943 RR	282
e3ed0575 MF	283	s.zalloc = gzalloc;
e3ed0575 MF	284	s.zfree = gzfree;
321359f2 MB	285
	286	r = inflateInit2(&s, -MAX_WBITS);
	287	if (r != Z_OK) {
918e9ebb	288	printf("Error: inflateInit2() returned %d\n", r);
35f6a943	289	return -1;
321359f2	290	}
35f6a943 RR	291	s.next_in = src + offset;
35f6a943 RR	292	s.avail_in = *lenp - offset;
321359f2 MB	293	s.next_out = dst;
321359f2 MB	294	s.avail_out = dstlen;
f039ada5 CR	295	do {
f039ada5 CR	296	r = inflate(&s, Z_FINISH);
b75650d8	297	if (stoponerr == 1 && r != Z_STREAM_END &&
19346657	298	(s.avail_in == 0 \|\| s.avail_out == 0 \|\| r != Z_BUF_ERROR)) {
f039ada5	299	printf("Error: inflate() returned %d\n", r);
9c55c54f SG	300	err = -1;
9c55c54f SG	301	break;
f039ada5	302	}
f039ada5	303	} while (r == Z_BUF_ERROR);
321359f2 MB	304	lenp = s.next_out - (unsigned char ) dst;
	305	inflateEnd(&s);
	306
9c55c54f	307	return err;
321359f2	308	}