[J-u-boot.git] / lib / gunzip.c

/*
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * 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 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);
}

#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, [email protected].
	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
	45	int gunzip(void dst, int dstlen, unsigned char src, unsigned long *lenp)
	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;
	66	if (i >= *lenp) {
	67	puts ("Error: gunzip out of data in header\n");
	68	return (-1);
	69	}
	70
35f6a943 RR	71	return zunzip(dst, dstlen, src, lenp, 1, i);
	72	}
	73
1811b7d3	74	#ifdef CONFIG_CMD_UNZIP
918e9ebb EN	75	__weak
	76	void gzwrite_progress_init(u64 expectedsize)
	77	{
	78	putc('\n');
	79	}
	80
	81	__weak
	82	void gzwrite_progress(int iteration,
	83	u64 bytes_written,
	84	u64 total_bytes)
	85	{
	86	if (0 == (iteration & 3))
	87	printf("%llu/%llu\r", bytes_written, total_bytes);
	88	}
	89
	90	__weak
	91	void gzwrite_progress_finish(int returnval,
	92	u64 bytes_written,
	93	u64 total_bytes,
	94	u32 expected_crc,
	95	u32 calculated_crc)
	96	{
	97	if (0 == returnval) {
	98	printf("\n\t%llu bytes, crc 0x%08x\n",
	99	total_bytes, calculated_crc);
	100	} else {
	101	printf("\n\tuncompressed %llu of %llu\n"
	102	"\tcrcs == 0x%08x/0x%08x\n",
	103	bytes_written, total_bytes,
	104	expected_crc, calculated_crc);
	105	}
	106	}
	107
	108	int gzwrite(unsigned char *src, int len,
4101f687	109	struct blk_desc *dev,
918e9ebb EN	110	unsigned long szwritebuf,
	111	u64 startoffs,
	112	u64 szexpected)
	113	{
	114	int i, flags;
	115	z_stream s;
	116	int r = 0;
	117	unsigned char *writebuf;
	118	unsigned crc = 0;
	119	u64 totalfilled = 0;
	120	lbaint_t blksperbuf, outblock;
	121	u32 expected_crc;
	122	u32 payload_size;
	123	int iteration = 0;
	124
	125	if (!szwritebuf \|\|
	126	(szwritebuf % dev->blksz) \|\|
	127	(szwritebuf < dev->blksz)) {
	128	printf("%s: size %lu not a multiple of %lu\n",
	129	__func__, szwritebuf, dev->blksz);
	130	return -1;
	131	}
	132
	133	if (startoffs & (dev->blksz-1)) {
	134	printf("%s: start offset %llu not a multiple of %lu\n",
	135	__func__, startoffs, dev->blksz);
	136	return -1;
	137	}
	138
	139	blksperbuf = szwritebuf / dev->blksz;
	140	outblock = lldiv(startoffs, dev->blksz);
	141
	142	/* skip header */
	143	i = 10;
	144	flags = src[3];
	145	if (src[2] != DEFLATED \|\| (flags & RESERVED) != 0) {
	146	puts("Error: Bad gzipped data\n");
	147	return -1;
	148	}
	149	if ((flags & EXTRA_FIELD) != 0)
	150	i = 12 + src[10] + (src[11] << 8);
	151	if ((flags & ORIG_NAME) != 0)
	152	while (src[i++] != 0)
	153	;
	154	if ((flags & COMMENT) != 0)
	155	while (src[i++] != 0)
	156	;
	157	if ((flags & HEAD_CRC) != 0)
	158	i += 2;
	159
	160	if (i >= len-8) {
	161	puts("Error: gunzip out of data in header");
	162	return -1;
	163	}
	164
	165	payload_size = len - i - 8;
	166
	167	memcpy(&expected_crc, src + len - 8, sizeof(expected_crc));
	168	expected_crc = le32_to_cpu(expected_crc);
	169	u32 szuncompressed;
	170	memcpy(&szuncompressed, src + len - 4, sizeof(szuncompressed));
	171	if (szexpected == 0) {
	172	szexpected = le32_to_cpu(szuncompressed);
	173	} else if (szuncompressed != (u32)szexpected) {
174	printf("size of %llx doesn't match trailer low bits %x\n",
175	szexpected, szuncompressed);
176	return -1;
177	}
178	if (lldiv(szexpected, dev->blksz) > (dev->lba - outblock)) {
179	printf("%s: uncompressed size %llu exceeds device size\n",
180	__func__, szexpected);
181	return -1;
182	}
183
184	gzwrite_progress_init(szexpected);
185
186	s.zalloc = gzalloc;
187	s.zfree = gzfree;
188
189	r = inflateInit2(&s, -MAX_WBITS);
190	if (r != Z_OK) {
191	printf("Error: inflateInit2() returned %d\n", r);
192	return -1;
193	}
194
195	s.next_in = src + i;
196	s.avail_in = payload_size+8;
d025021e	197	writebuf = (unsigned char *)malloc_cache_aligned(szwritebuf);
918e9ebb EN	198
	199	/* decompress until deflate stream ends or end of file */
	200	do {
	201	if (s.avail_in == 0) {
	202	printf("%s: weird termination with result %d\n",
	203	__func__, r);
	204	break;
	205	}
	206
	207	/* run inflate() on input until output buffer not full */
	208	do {
	209	unsigned long blocks_written;
	210	int numfilled;
	211	lbaint_t writeblocks;
	212
	213	s.avail_out = szwritebuf;
	214	s.next_out = writebuf;
	215	r = inflate(&s, Z_SYNC_FLUSH);
	216	if ((r != Z_OK) &&
	217	(r != Z_STREAM_END)) {
	218	printf("Error: inflate() returned %d\n", r);
	219	goto out;
	220	}
	221	numfilled = szwritebuf - s.avail_out;
	222	crc = crc32(crc, writebuf, numfilled);
	223	totalfilled += numfilled;
	224	if (numfilled < szwritebuf) {
	225	writeblocks = (numfilled+dev->blksz-1)
	226	/ dev->blksz;
	227	memset(writebuf+numfilled, 0,
	228	dev->blksz-(numfilled%dev->blksz));
	229	} else {
	230	writeblocks = blksperbuf;
	231	}
	232
	233	gzwrite_progress(iteration++,
	234	totalfilled,
	235	szexpected);
6a3bf3e5 EN	236	blocks_written = blk_dwrite(dev, outblock,
6a3bf3e5 EN	237	writeblocks, writebuf);
918e9ebb EN	238	outblock += blocks_written;
	239	if (ctrlc()) {
	240	puts("abort\n");
	241	goto out;
	242	}
	243	WATCHDOG_RESET();
	244	} while (s.avail_out == 0);
	245	/* done when inflate() says it's done */
	246	} while (r != Z_STREAM_END);
	247
	248	if ((szexpected != totalfilled) \|\|
	249	(crc != expected_crc))
	250	r = -1;
	251	else
	252	r = 0;
	253
	254	out:
	255	gzwrite_progress_finish(r, totalfilled, szexpected,
	256	expected_crc, crc);
	257	free(writebuf);
	258	inflateEnd(&s);
	259
	260	return r;
	261	}
1811b7d3	262	#endif
918e9ebb	263
35f6a943 RR	264	/*
	265	* Uncompress blocks compressed with zlib without headers
	266	*/
	267	int zunzip(void dst, int dstlen, unsigned char src, unsigned long *lenp,
	268	int stoponerr, int offset)
	269	{
	270	z_stream s;
9c55c54f	271	int err = 0;
35f6a943 RR	272	int r;
35f6a943 RR	273
e3ed0575 MF	274	s.zalloc = gzalloc;
e3ed0575 MF	275	s.zfree = gzfree;
321359f2 MB	276
	277	r = inflateInit2(&s, -MAX_WBITS);
	278	if (r != Z_OK) {
918e9ebb	279	printf("Error: inflateInit2() returned %d\n", r);
35f6a943	280	return -1;
321359f2	281	}
35f6a943 RR	282	s.next_in = src + offset;
35f6a943 RR	283	s.avail_in = *lenp - offset;
321359f2 MB	284	s.next_out = dst;
321359f2 MB	285	s.avail_out = dstlen;
f039ada5 CR	286	do {
f039ada5 CR	287	r = inflate(&s, Z_FINISH);
b75650d8	288	if (stoponerr == 1 && r != Z_STREAM_END &&
19346657	289	(s.avail_in == 0 \|\| s.avail_out == 0 \|\| r != Z_BUF_ERROR)) {
f039ada5	290	printf("Error: inflate() returned %d\n", r);
9c55c54f SG	291	err = -1;
9c55c54f SG	292	break;
f039ada5	293	}
f039ada5	294	} while (r == Z_BUF_ERROR);
321359f2 MB	295	lenp = s.next_out - (unsigned char ) dst;
	296	inflateEnd(&s);
	297
9c55c54f	298	return err;
321359f2	299	}