tools/firmware-utils: add seama tool

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 33840

1 files changed, 529 insertions, 0 deletions

diff --git a/tools/firmware-utils/src/seama.c b/tools/firmware-utils/src/seama.c
new file mode 100644
index 0000000..944ed3a
--- /dev/null
+++ b/tools/firmware-utils/src/seama.c
@@ -0,0 +1,529 @@
+/* vi: set sw=4 ts=4: */
+/*
+ *	Copyright (C) 2008, Alpha Networks, Inc.
+ *	Created by David Hsieh <david_hsieh@alphanetworks.com>
+ *	All right reserved.
+ *
+ *	(SEA)ttle i(MA)ge is the image which used in project seattle.
+ *
+ *	Redistribution and use in source and binary forms, with or
+ *	without modification, are permitted provided that the following
+ *	conditions are met:
+ *
+ *	1.	Redistributions of source code must retain the above
+ *		copyright notice, this list of conditions and the following
+ *		disclaimer.
+ *
+ *	2.	Redistributions in binary form must reproduce the above
+ *		copyright notice, this list of conditions and the following
+ *		disclaimer in the documentation and/or other materials
+ *		provided with the distribution.
+ *
+ *	3.	The name of the author may not be used to endorse or promote
+ *		products derived from this software without specific prior
+ *		written permission.
+ *
+ *	THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+ *	EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ *	THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ *	PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR
+ *	BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ *	EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ *	TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ *	ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ *	LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ *	IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ *	THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "md5.h"
+#include "seama.h"
+
+#define PROGNAME			"seama"
+#define VERSION				"0.20"
+#define MAX_SEAMA_META_SIZE	1024
+#define MAX_META			128
+#define MAX_IMAGE			128
+
+extern int optind;
+extern char * optarg;
+
+static int		o_verbose = 0;		/* verbose mode. */
+static char *	o_dump = NULL;		/* Seama file to dump. */
+static char *	o_seal = NULL;		/* Seal the input images when file name exist. */
+static char *	o_extract = NULL;	/* Extract the seama file. */
+static char *	o_images[MAX_IMAGE];/* The image files to pack or seal */
+static int		o_isize = 0;		/* number of images */
+static char *	o_meta[MAX_META];	/* meta data array */
+static int		o_msize = 0;		/* size of meta array */
+
+static void verbose(const char * format, ...)
+{
+	va_list marker;
+	if (o_verbose)
+	{
+		va_start(marker, format);
+		vfprintf(stdout, format, marker);
+		va_end(marker);
+	}
+}
+
+static void cleanup_exit(int exit_code)
+{
+	verbose("%s: exit with code %d\n", PROGNAME, exit_code);
+	exit(exit_code);
+}
+
+static void show_usage(int exit_code)
+{
+	printf(	PROGNAME " version " VERSION "\n"
+			"usage: " PROGNAME " [OPTIONS]\n"
+			"  -h                 show this help message.\n"
+			"  -v                 verbose mode.\n"
+			"  -m {META data}     META data.\n"
+			"  -d {file}          dump the info of the seama file.\n"
+			"  -i {input file}    image file name.\n"
+			"  -s {file}          Seal the images to the seama file.\n"
+			"  -x {seama file}    Extract the seama file.\n"
+			"\n"
+			"  SEAMA can pack the input file (with -i) into a seama file.\n"
+			"  ex: seama -i target.file\n"
+			"  SEAMA can also seal multiple seama files into a single seama file.\n"
+			"  ex: seama -s final.file -i taget1.seama -i target2.seama\n"
+			"  To extract the raw image from SEAMA, you need to specify the meta.\n"
+			"  The first image match the specified meta will be extract to\n"
+			"  the output file which was specified with '-x'.\n"
+			"  ex: seama -x output -i seama.image -m file=sealpac\n"
+			);
+	cleanup_exit(exit_code);
+}
+
+static int parse_args(int argc, char * argv[])
+{
+	int opt;
+
+	while ((opt = getopt(argc, argv, "hvd:s:i:m:x:")) > 0)
+	{
+		switch (opt)
+		{
+		default:	show_usage(-1); break;
+		case 'h':	show_usage(0); break;
+		case 'v':	o_verbose++; break;
+		case 'd':	o_dump = optarg; break;
+		case 's':	o_seal = optarg; break;
+		case 'x':	o_extract = optarg; break;
+		case 'i':
+			if (o_isize < MAX_IMAGE) o_images[o_isize++] = optarg;
+			else printf("Exceed the maximum acceptable image files.!\n");
+			break;
+		case 'm':
+			if (o_msize < MAX_META) o_meta[o_msize++] = optarg;
+			else printf("Exceed the maximum acceptable META data.!\n");
+			break;
+		}
+	}
+	return 0;
+}
+
+/*******************************************************************/
+
+static size_t calculate_digest(FILE * fh, size_t size, uint8_t * digest)
+{
+	MD5_CTX ctx;
+	size_t bytes_left, bytes_read, i;
+	uint8_t buf[MAX_SEAMA_META_SIZE];
+
+	bytes_left = size ? size : sizeof(buf);
+	bytes_read = 0;
+
+	MD5_Init(&ctx);
+	while (!feof(fh) && !ferror(fh) && bytes_left > 0)
+	{
+		i = bytes_left < sizeof(buf) ? bytes_left : sizeof(buf);
+		i = fread(buf, sizeof(char), i, fh);
+		if (i > 0)
+		{
+			MD5_Update(&ctx, buf, i);
+			bytes_read += i;
+		}
+		if (size) bytes_left -= i;
+	}
+	MD5_Final(digest, &ctx);
+	return bytes_read;
+}
+
+#define READ_BUFF_SIZE 8*1024
+static size_t copy_file(FILE * to, FILE * from)
+{
+	size_t i, fsize = 0;
+	uint8_t buf[READ_BUFF_SIZE];
+
+	while (!feof(from) && !ferror(from))
+	{
+		i = fread(buf, sizeof(uint8_t), READ_BUFF_SIZE, from);
+		if (i > 0)
+		{
+			fsize += i;
+			fwrite(buf, sizeof(uint8_t), i, to);
+		}
+	}
+	return fsize;
+}
+
+static int verify_seama(const char * fname, int msg)
+{
+	FILE * fh = NULL;
+	struct stat st;
+	seamahdr_t shdr;
+	uint8_t checksum[16];
+	uint8_t digest[16];
+	uint8_t buf[MAX_SEAMA_META_SIZE];
+	size_t msize, isize, i;
+	int ret = -1;
+
+#define ERRBREAK(fmt, args...) { if (msg) printf(fmt, ##args); break; }
+
+	do
+	{
+		if (stat(fname, &st) < 0)				ERRBREAK("Unable to get the info of '%s'\n",fname);
+		if ((fh = fopen(fname, "r+"))==NULL)	ERRBREAK("Unable to open '%s' for reading!\n",fname);
+
+		/* Dump SEAMA header */
+		if (msg) printf("FILE - %s (%d bytes)\n", fname, (int)st.st_size);
+
+		/* SEAMA */
+		while (!feof(fh) && !ferror(fh))
+		{
+			/* read header */
+			if (fread(&shdr, sizeof(shdr), 1, fh) != 1) break;
+
+			/* Check the magic number */
+			if (shdr.magic != htonl(SEAMA_MAGIC)) ERRBREAK("Invalid SEAMA magic. Probably no more SEAMA!\n");
+
+			/* Get the size */
+			isize = ntohl(shdr.size);
+			msize = ntohs(shdr.metasize);
+
+			/* The checksum exist only if size is greater than zero. */
+			if (isize > 0)
+			{
+				if (fread(checksum, sizeof(checksum), 1, fh) != 1)
+					ERRBREAK("Error reading checksum !\n");
+			}
+
+			/* Check the META size. */
+			if (msize > sizeof(buf)) ERRBREAK("META data in SEAMA header is too large!\n");
+
+			/* Read META data. */
+			if (fread(buf, sizeof(char), msize, fh) != msize)
+				ERRBREAK("Unable to read SEAMA META data!\n");
+
+			/* dump header */
+			if (msg)
+			{
+				printf("SEAMA ==========================================\n");
+				printf("  magic      : %08x\n", ntohl(shdr.magic));
+				printf("  meta size  : %d bytes\n", msize);
+				for (i=0; i<msize; i+=(strlen((const char *)&buf[i])+1))
+					printf("  meta data  : %s\n", &buf[i]);
+				printf("  image size : %d bytes\n", isize);
+			}
+
+			/* verify checksum */
+			if (isize > 0)
+			{
+				if (msg)
+				{
+					printf("  checksum   : ");
+					for (i=0; i<16; i++) printf("%02X", checksum[i]);
+					printf("\n");
+				}
+
+				/* Calculate the checksum */
+				calculate_digest(fh, isize, digest);
+				if (msg)
+				{
+					printf("  digest     : ");
+					for (i=0; i<16; i++) printf("%02X", digest[i]);
+					printf("\n");
+				}
+
+				if (memcmp(checksum, digest, 16)!=0) ERRBREAK("!!ERROR!! checksum error !!\n");
+				ret = 0;
+			}
+		}
+		if (msg) printf("================================================\n");
+	} while (0);
+	if (fh) fclose(fh);
+	return ret;
+}
+
+static size_t write_seama_header(FILE * fh, char * meta[], size_t msize, size_t size)
+{
+	seamahdr_t shdr;
+	size_t i;
+	uint16_t metasize = 0;
+
+	/* Calculate the META size */
+	for (i=0; i<msize; i++) metasize += (strlen(meta[i]) + 1);
+	//+++ let meta data end on 4 alignment by siyou. 2010/3/1 03:58pm
+	metasize = ((metasize+3)/4)*4;
+	verbose("SEAMA META : %d bytes\n", metasize);
+
+	/* Fill up the header, all the data endian should be network byte order. */
+	shdr.magic		= htonl(SEAMA_MAGIC);
+	shdr.reserved	= 0;
+	shdr.metasize	= htons(metasize);
+	shdr.size		= htonl(size);
+
+	/* Write the header */
+	return fwrite(&shdr, sizeof(seamahdr_t), 1, fh);
+}
+
+static size_t write_checksum(FILE * fh, uint8_t * checksum)
+{
+	return fwrite(checksum, sizeof(uint8_t), 16, fh);
+}
+
+static size_t write_meta_data(FILE * fh, char * meta[], size_t size)
+{
+	size_t i,j;
+	size_t ret = 0;
+
+	for (i=0; i<size; i++)
+	{
+		verbose("SEAMA META data : %s\n", meta[i]);
+		j = fwrite(meta[i], sizeof(char), strlen(meta[i])+1, fh);
+		if (j != strlen(meta[i])+1) return 0;
+		ret += j;
+	}
+	//+++ let meta data end on 4 alignment by siyou. 2010/3/1 03:58pm
+	j = ((ret+3)/4)*4;
+	for ( ; ret < j; ret++)
+		fwrite("", sizeof(char), 1, fh);
+
+	return ret;
+}
+
+/*******************************************************************/
+
+static void dump_seama(const char * fname)
+{
+	verify_seama(fname, 1);
+}
+
+static void seal_files(const char * file)
+{
+	FILE * fh;
+	FILE * ifh;
+	size_t i;
+
+	/* Each image should be seama. */
+	for (i = 0; i < o_isize; i++)
+	{
+		if (verify_seama(o_images[i], 0) < 0)
+		{
+			printf("'%s' is not a seama file !\n",o_images[i]);
+			return;
+		}
+	}
+
+	/* Open file for write */
+	fh = fopen(file, "w+");
+	if (fh)
+	{
+		/* Write the header. */
+		write_seama_header(fh, o_meta, o_msize, 0);
+		write_meta_data(fh, o_meta, o_msize);
+
+		/* Write image files */
+		for (i=0; i<o_isize; i++)
+		{
+			ifh = fopen(o_images[i], "r+");
+			if (ifh)
+			{
+				copy_file(fh, ifh);
+				fclose(ifh);
+			}
+		}
+
+		fclose(fh);
+	}
+}
+
+static void pack_files(void)
+{
+	FILE * fh;
+	FILE * ifh;
+	size_t i, fsize;
+	char filename[512];
+	uint8_t digest[16];
+
+	for (i=0; i<o_isize; i++)
+	{
+		/* Open the input file. */
+		ifh = fopen(o_images[i], "r+");
+		if (ifh)
+		{
+			fsize = calculate_digest(ifh, 0, digest);
+			verbose("file size (%s) : %d\n", o_images[i], fsize);
+			rewind(ifh);
+
+			/* Open the output file. */
+			sprintf(filename, "%s.seama", o_images[i]);
+			fh = fopen(filename, "w+");
+			if (fh)
+			{
+				write_seama_header(fh, o_meta, o_msize, fsize);
+				write_checksum(fh, digest);
+				write_meta_data(fh, o_meta, o_msize);
+				copy_file(fh, ifh);
+				fclose(fh);
+			}
+			fclose(ifh);
+		}
+		else
+		{
+			printf("Unable to open image file '%s'\n",o_images[i]);
+		}
+	}
+}
+
+/**************************************************************************/
+
+static int match_meta(const char * meta, size_t size)
+{
+	size_t i, j;
+	int match;
+
+	for (i = 0; i < o_msize; i++)
+	{
+		for (match = 0, j = 0; j < size; j += (strlen(&meta[j])+1))
+			if (strcmp(&meta[j], o_meta[i])==0) { match++; break; }
+		if (!match) return 0;
+	}
+	return 1;
+}
+
+
+static void extract_file(const char * output)
+{
+	FILE * ifh = NULL;
+	FILE * ofh = NULL;
+	size_t msize, isize, i, m;
+	seamahdr_t shdr;
+	uint8_t buf[MAX_SEAMA_META_SIZE];
+	int done = 0;
+
+	/* We need meta for searching the target image. */
+	if (o_msize == 0)
+	{
+		printf("SEAMA: need meta for searching image.\n");
+		return;
+	}
+
+	/* Walk through each input file */
+	for (i = 0; i < o_isize; i++)
+	{
+		/* verify the input file */
+		if (verify_seama(o_images[i], 0) < 0)
+		{
+			printf("SEAMA: '%s' is not a seama file !\n", o_images[i]);
+			continue;
+		}
+		/* open the input file */
+		ifh  = fopen(o_images[i], "r");
+		if (!ifh) continue;
+		/* read file */
+		while (!feof(ifh) && !ferror(ifh))
+		{
+			/* read header */
+			fread(&shdr, sizeof(shdr), 1, ifh);
+			if (shdr.magic != htonl(SEAMA_MAGIC)) break;
+			/* Get the size */
+			isize = ntohl(shdr.size);
+			msize = ntohs(shdr.metasize);
+			if (isize == 0)
+			{
+				while (msize > 0)
+				{
+					m = fread(buf, sizeof(char), (msize < MAX_SEAMA_META_SIZE) ? msize : MAX_SEAMA_META_SIZE, ifh);
+					if (m <= 0) break;
+					msize -= m;
+				}
+				continue;
+			}
+			/* read checksum */
+			fread(buf, sizeof(char), 16, ifh);
+			if (msize > 0)
+			{
+				/* read META */
+				fread(buf, sizeof(char), msize, ifh);
+				if (match_meta((const char *)buf, msize))
+				{
+					printf("SEAMA: found image @ '%s', image size: %d\n", o_images[i], isize);
+					/* open output file */
+					ofh = fopen(output, "w");
+					if (!ofh) printf("SEAMA: unable to open '%s' for writting.\n",output);
+					else
+					{
+						while (isize > 0)
+						{
+							m = fread(buf, sizeof(char), (isize < MAX_SEAMA_META_SIZE) ? isize : MAX_SEAMA_META_SIZE, ifh);
+							if (m <= 0) break;
+							fwrite(buf, sizeof(char), m, ofh);
+							isize -= m;
+						}
+						fclose(ofh);
+					}
+					done++;
+					break;
+				}
+			}
+			while (isize > 0)
+			{
+				m = fread(buf, sizeof(char), (isize < MAX_SEAMA_META_SIZE) ? isize : MAX_SEAMA_META_SIZE, ifh);
+				if (m <= 0) break;
+				isize -= m;
+			}
+		}
+		/* close the file. */
+		fclose(ifh);
+		if (done) break;
+	}
+	return;
+}
+
+/*******************************************************************/
+#ifdef RGBIN_BOX
+int seama_main(int argc, char * argv[], char * env[])
+#else
+int main(int argc, char * argv[], char * env[])
+#endif
+{
+	verbose("SEAMA version " VERSION "\n");
+
+	/* parse the arguments */
+	if (parse_args(argc, argv) < 0) show_usage(9);
+
+	/* Do the works */
+	if		(o_dump)	dump_seama(o_dump);
+	else if (o_seal)	seal_files(o_seal);
+	else if	(o_extract)	extract_file(o_extract);
+	else				pack_files();
+
+	cleanup_exit(0);
+	return 0;
+}