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