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// Handle partitions
#include <stdio.h>
#define TFM_DESC
#include <tomcrypt.h>
#include "zlib.h"
static FILE *outfile;
static FILE *zfile;
static int hashid;
static unsigned char *zbuf;
static long zbufsize;
static long zblocksize;
static char *hashname;
#define PATTERN_SIZE 4096
#define DO(x) do { run_cmd((x), __LINE__, __FILE__, #x); } while (0);
static void run_cmd(int res, int line, char *file, char *cmd)
{
if (res != CRYPT_OK) {
fprintf(stderr, "%s (%d)\n%s:%d:%s\n", error_to_string(res), res, file, line, cmd);
if (res != CRYPT_NOP) {
exit(EXIT_FAILURE);
}
}
}
static void write_block(long blocknum, unsigned char *buf)
{
unsigned char md[MAXBLOCKSIZE];
unsigned long mdlen;
uLongf zlen;
int zresult;
int j;
mdlen = sizeof(md);
DO(hash_memory(hashid, buf, zblocksize, md, &mdlen));
zlen = zbufsize;
if ((zresult = compress(zbuf, &zlen, buf, zblocksize)) != Z_OK) {
fprintf(stderr, "Compress failure at block 0x%lx - %d\n", blocknum, zresult);
}
fprintf(outfile, "zblock: %lx %lx %s ", blocknum, zlen, hashname);
for(j=0; j<mdlen; j++)
fprintf(outfile,"%02x",md[j]);
fprintf(outfile, "\n");
fprintf(zfile, "zblock: %lx %lx %s ", blocknum, zlen, hashname);
for(j=0; j<mdlen; j++)
fprintf(zfile,"%02x",md[j]);
fprintf(zfile, "\n");
fwrite(zbuf, sizeof(char), zlen, zfile);
fprintf(zfile, "\n");
}
static int read_block(unsigned char *buf, FILE *infile, int is_last_block)
{
int readlen = fread(buf, 1, zblocksize, infile);
unsigned char *p;
if (readlen != zblocksize && readlen && is_last_block) {
for (p = &buf[readlen]; p < &buf[zblocksize]; p++) {
*p = 0xff;
}
readlen = zblocksize;
}
return readlen;
}
int main(int argc, char **argv)
{
char *fname;
unsigned char *buf; // EBLOCKSIZE
FILE *infile;
long eblocks = -1;
long i;
off_t insize;
int readlen;
int skip;
unsigned char *pbuf; // fill pattern buffer
char pname[PATH_MAX]; // fill pattern file name
FILE *pfile; // fill pattern file
int patterned, n;
if (argc < 6) {
fprintf(stderr, "%s: zblocksize hashname signed_file_name spec_file_name zdata_file_name [ #blocks ]\n", argv[0]);
return EXIT_FAILURE;
}
if (argc == 7)
eblocks = strtol(argv[6], 0, 0);
zblocksize = strtol(argv[1], 0, 0);
buf = malloc(zblocksize);
LTC_ARGCHK(buf != 0);
/*
* For zlib compress, the destination buffer needs to be 1.001 x the
* src buffer size plus 12 bytes
*/
zbufsize = ((zblocksize * 102) / 100) + 12;
zbuf = malloc(zbufsize);
LTC_ARGCHK(zbuf != 0);
LTC_ARGCHK(register_hash(&sha256_desc) != -1);
LTC_ARGCHK(register_hash(&rmd160_desc) != -1);
LTC_ARGCHK(register_hash(&md5_desc) != -1);
hashname = argv[2];
hashid = find_hash(hashname);
LTC_ARGCHK(hashid >= 0);
/* open filesystem image file */
infile = fopen(argv[3], "rb");
LTC_ARGCHK(infile != NULL);
/* open and read an optional fill pattern file */
pbuf = NULL;
strncpy(pname, argv[3], sizeof(pname) - 6);
strcat(pname, ".fill");
pname[sizeof(pname) - 1] = 0;
pfile = fopen(pname, "rb");
if (pfile != NULL) {
pbuf = malloc(PATTERN_SIZE);
LTC_ARGCHK(pbuf != NULL);
n = fread(pbuf, 1, PATTERN_SIZE, pfile);
LTC_ARGCHK(n == PATTERN_SIZE);
fclose(pfile);
}
/* open output file */
outfile = fopen(argv[4], "wb");
LTC_ARGCHK(outfile != NULL);
LTC_ARGCHK(fputs("[ifndef] #eblocks-written\n", outfile) >= 0);
LTC_ARGCHK(fputs("[ifdef] last-eblock#\n", outfile) >= 0);
LTC_ARGCHK(fputs(": pdup ( n -- n' ) dup last-eblock# max ;\n", outfile) >= 0);
LTC_ARGCHK(fputs("also nand-commands patch pdup dup zblock: previous\n", outfile) >= 0);
LTC_ARGCHK(fputs("[then]\n", outfile) >= 0);
LTC_ARGCHK(fputs("[then]\n", outfile) >= 0);
/* open zdata file */
zfile = fopen(argv[5], "wb");
LTC_ARGCHK(zfile != NULL);
if (eblocks == -1) {
(void)fseek(infile, 0L, SEEK_END);
insize = ftello(infile);
(void)fseek(infile, 0L, SEEK_SET);
eblocks = (insize + zblocksize - 1) / zblocksize;
// LTC_ARGCHK((eblocks * zblocksize) == insize);
}
/* Remove possible path prefix */
fname = strrchr(argv[5], '/');
if (fname == NULL)
fname = argv[5];
else
++fname;
fprintf(outfile, "data: %s\n", fname);
fprintf(outfile, "zblocks: %lx %lx\n", zblocksize, eblocks);
fprintf(zfile, "zblocks: %lx %lx\n", zblocksize, eblocks);
fprintf(stdout, "Total blocks: %ld\n", eblocks);
fseek(infile, zblocksize, SEEK_SET);
/* make a hash of the file */
for (i=1; i < eblocks; i++) {
readlen = read_block(buf, infile, i == eblocks-1);
LTC_ARGCHK(readlen == zblocksize);
#ifdef notdef
skip = 1;
for (p = (unsigned char *)buf; p < &buf[zblocksize]; p++) {
if (*p != 0xff) {
skip = 0;
break;
}
}
#else
skip = 0;
#endif
if (pbuf) {
/* check if this zblock is fully patterned as unused, and if
any parts of the zblock are patterned then zero them, for ease
of compression */
patterned = 1;
for (n = 0; n < (zblocksize / PATTERN_SIZE); n++) {
if (memcmp(&buf[n*PATTERN_SIZE], pbuf, PATTERN_SIZE)) {
patterned = 0;
} else {
memset(&buf[n*PATTERN_SIZE], 0, PATTERN_SIZE);
}
}
/* skip any block that is fully patterned, thus relying on the
fs-update card erase-blocks */
if (patterned) skip++;
}
if (!skip)
write_block(i, buf);
fprintf(stdout, "\r%ld", i); fflush(stdout);
}
fseek(infile, 0L, SEEK_SET);
readlen = read_block(buf, infile, 0 == eblocks-1);
LTC_ARGCHK(readlen == zblocksize);
write_block(0, buf);
fprintf(outfile, "zblocks-end:\n");
fprintf(zfile, "zblocks-end:\n");
fclose(infile);
fclose(outfile);
putchar('\n');
return EXIT_SUCCESS;
}
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