patchdiff2/backup.cpp at master · filcab/patchdiff2 · GitHub

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Patchdiff2

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License version 2 as

published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program. If not, see <http://www.gnu.org/licenses/>.

#include "precomp.hpp"

#include "sig.hpp"

#include "diff.hpp"

#include "options.hpp"

#include "backup.hpp"

static void buffer_serialize_data(char * buf, size_t blen, size_t * pos, void * data, size_t dsize)

{

if ( (*pos + dsize) > blen)

{

*pos = blen;

return;

}

memcpy(buf+*pos, data, dsize);

*pos += dsize;

}

static void buffer_unserialize_data(char * buf, size_t blen, size_t * pos, void * data, size_t dsize)

{

if ( (*pos + dsize) > blen)

{

*pos = blen;

return;

}

memcpy(data, buf+*pos, dsize);

*pos += dsize;

}

static void buffer_serialize_ea(char * buf, size_t blen, size_t * pos, ea_t ea)

{

buffer_serialize_data(buf, blen, pos, &ea, sizeof(ea));

}

static void buffer_serialize_bool(char * buf, size_t blen, size_t * pos, bool b)

{

buffer_serialize_data(buf, blen, pos, &b, sizeof(b));

}

static void buffer_serialize_char(char * buf, size_t blen, size_t * pos, char c)

{

buffer_serialize_data(buf, blen, pos, &c, sizeof(c));

}

static void buffer_serialize_int(char * buf, size_t blen, size_t * pos, int i)

{

buffer_serialize_data(buf, blen, pos, &i, sizeof(i));

}

static void buffer_serialize_long(char * buf, size_t blen, size_t * pos, unsigned long l)

{

buffer_serialize_data(buf, blen, pos, &l, sizeof(l));

}

static void buffer_serialize_size(char * buf, size_t blen, size_t * pos, size_t size)

{

buffer_serialize_data(buf, blen, pos, &size, sizeof(size));

}

static void buffer_unserialize_ea(char * buf, size_t blen, size_t * pos, ea_t * ea)

{

buffer_unserialize_data(buf, blen, pos, ea, sizeof(*ea));

}

static void buffer_unserialize_bool(char * buf, size_t blen, size_t * pos, bool * b)

{

buffer_unserialize_data(buf, blen, pos, b, sizeof(*b));

}

static void buffer_unserialize_char(char * buf, size_t blen, size_t * pos, char * c)

{

buffer_unserialize_data(buf, blen, pos, c, sizeof(*c));

}

static void buffer_unserialize_int(char * buf, size_t blen, size_t * pos, int * i)

{

buffer_unserialize_data(buf, blen, pos, i, sizeof(*i));

}

static void buffer_unserialize_long(char * buf, size_t blen, size_t * pos, unsigned long * l)

{

buffer_unserialize_data(buf, blen, pos, l, sizeof(*l));

}

static void buffer_unserialize_size(char * buf, size_t blen, size_t * pos, size_t * size)

{

buffer_unserialize_data(buf, blen, pos, size, sizeof(*size));

}

/*------------------------------------------------*/

/* function : buffer_serialize_string */

/* description: Serializes a string */

/*------------------------------------------------*/

static void buffer_serialize_string(char * buf, size_t blen, size_t * pos, char * s)

{

size_t len;

len = strlen(s) + 1;

if ( (*pos + len) > blen)

{

*pos = blen;

return;

}

memcpy(buf+*pos, s, len);

*pos += len;

}

/*------------------------------------------------*/

/* function : buffer_unserialize_string */

/* description: Unserializes a string */

/*------------------------------------------------*/

static void buffer_unserialize_string(char * buf, size_t blen, size_t * pos, char ** s)

{

*s = qstrdup(buf+*pos);

*pos += strlen(*s) + 1;

}

/*------------------------------------------------*/

/* function : singleton_serialize */

/* description: Serializes a signature */

/*------------------------------------------------*/

static size_t singleton_serialize(char * buf, size_t blen, psig_t * s, int nfile)

{

size_t pos = 0;

fref_t * fref = NULL;

int num, i;

buffer_serialize_ea(buf, blen, &pos, s->startEA);

buffer_serialize_int(buf, blen, &pos, s->mtype);

buffer_serialize_int(buf, blen, &pos, s->id_crc);

buffer_serialize_int(buf, blen, &pos, nfile);

buffer_serialize_long(buf, blen, &pos, s->sig);

buffer_serialize_long(buf, blen, &pos, s->hash);

buffer_serialize_long(buf, blen, &pos, s->crc_hash);

buffer_serialize_long(buf, blen, &pos, s->str_hash);

buffer_serialize_int(buf, blen, &pos, s->flag);

buffer_serialize_long(buf, blen, &pos, s->lines);

num= 0;

if (s->srefs)

{

fref = s->srefs->list;

num = s->srefs->num;

}

buffer_serialize_int(buf, blen, &pos, num);

for (i=0; i<num; i++)

{

buffer_serialize_ea(buf, blen, &pos, fref->ea);

buffer_serialize_int(buf, blen, &pos, fref->type);

fref = fref->next;

}

if (nfile == 2)

{

if (!strncmp(s->name, "sub_", 4))

{

buffer_serialize_char(buf, blen, &pos, 0);

}

else

{

buffer_serialize_char(buf, blen, &pos, 1);

buffer_serialize_string(buf, blen, &pos, s->name);

}

return pos;

}

/*------------------------------------------------*/

/* function : singleton_unserialize */

/* description: Serializes a signature */

/*------------------------------------------------*/

static size_t singleton_unserialize(char * buf, size_t blen, psig_t ** s, int version)

{

char tmp[512];

size_t pos = 0;

char c;

int num, i;

ea_t ea;

int type;

*s = sig_init();

if (!(*s)) return 0;

buffer_unserialize_ea(buf, blen, &pos, &(*s)->startEA);

buffer_unserialize_int(buf, blen, &pos, &(*s)->mtype);

buffer_unserialize_int(buf, blen, &pos, &(*s)->id_crc);

buffer_unserialize_int(buf, blen, &pos, &(*s)->nfile);

buffer_unserialize_long(buf, blen, &pos, &(*s)->sig);

buffer_unserialize_long(buf, blen, &pos, &(*s)->hash);

buffer_unserialize_long(buf, blen, &pos, &(*s)->crc_hash);

if (version >= 2)

buffer_unserialize_long(buf, blen, &pos, &(*s)->str_hash);

if (version >= 3)

buffer_unserialize_int(buf, blen, &pos, &(*s)->flag);

buffer_unserialize_long(buf, blen, &pos, &(*s)->lines);

buffer_unserialize_int(buf, blen, &pos, &num);

for (i=0; i<num; i++)

{

buffer_unserialize_ea(buf, blen, &pos, &ea);

buffer_unserialize_int(buf, blen, &pos, &type);

sig_add_sref(*s, ea, type, CHECK_REF);

}

if ((*s)->nfile == 2)

{

buffer_unserialize_char(buf, blen, &pos, &c);

if (c == 1)

buffer_unserialize_string(buf, blen, &pos, &(*s)->name);

else

{

qsnprintf(tmp, sizeof(tmp), "sub_%a", (*s)->startEA);

sig_set_name((*s), tmp);

}

else

{

pget_func_name((*s)->startEA, tmp, sizeof(tmp));

sig_set_name(*s, tmp);

}

return pos;

}

/*------------------------------------------------*/

/* function : pair_serialize */

/* description: Serializes a signature and the */

/* matched signature */

/*------------------------------------------------*/

static size_t pair_serialize(char * buf, size_t blen, psig_t * s)

{

size_t len;

len = singleton_serialize(buf, blen, s, 1);

len += singleton_serialize(buf+len, blen-len, s->msig, 2);

return len;

}

/*------------------------------------------------*/

/* function : pair_unserialize */

/* description: Unserializes a signature and the */

/* matched signature */

/*------------------------------------------------*/

static size_t pair_unserialize(char * buf, size_t blen, psig_t ** s, int version)

{

size_t len;

len = singleton_unserialize(buf, blen, s, version);

len += singleton_unserialize(buf+len, blen-len, &(*s)->msig, version);

(*s)->msig->msig = (*s);

return len;

}

/*------------------------------------------------*/

/* function : backup_save_list */

/* description: Backups result list inside a */

/* netnode */

/*------------------------------------------------*/

static void backup_save_list(const char *node_name, slist_t * sl)

{

char buf[5000];

size_t i;

size_t len;

netnode node;

if (!sl) return;

node.create(node_name);

for (i=0; i<sl->num; i++)

{

nodeidx_t nidx = node.altval(i);

if (nidx != 0)

{

msg("backup failed: netnode already exists !!\n");

return;

}

netnode n(nidx);

n.create();

node.altset(i, n);

if (sl->sigs[i]->msig != NULL)

len = pair_serialize(buf, sizeof(buf), sl->sigs[i]);

else

len = singleton_serialize(buf, sizeof(buf), sl->sigs[i], sl->sigs[i]->nfile);

n.setblob(buf, len, 0, 'P');

}

/*------------------------------------------------*/

/* function : backup_load_list */

/* description: Loads result list from a netnode */

/*------------------------------------------------*/

static bool backup_load_list(const char *node_name, slist_t * sl, int type, int version)

{

char buf[5000];

size_t i;

size_t len;

netnode node;

nodeidx_t nidx;

if (!sl) return true;

node.create(node_name);

for (i=0; i<sl->org_num; i++)

{

nidx = node.altval(i);

if (nidx == BADNODE)

{

msg("backup failed: netnode does not exist !!\n");

return false;

}

netnode n(nidx);

len = sizeof(buf);

if (!n.getblob(buf, &len, 0, 'P'))

{

msg("backup failed: netnode blob does not exist !!\n");

return false;

}

if (type)

pair_unserialize(buf, len, &sl->sigs[i], version);

else

singleton_unserialize(buf, len, &sl->sigs[i], version);

}

sl->num = sl->org_num;

return true;

}

/*------------------------------------------------*/

/* function : backup_free_node */

/* description: Removes node from the IDB */

/*------------------------------------------------*/

static void backup_free_node(const char *node_name, size_t size)

{

netnode node;

size_t i;

node.create(node_name);

for (i=0; i<size; i++)

{

nodeidx_t nidx = node.altval(i);

netnode n(nidx);

n.delblob(0, 'P');

n.kill();

}

node.kill();

}

/*------------------------------------------------*/

/* function : backup_cleanup */

/* description: Removes results from the IDB */

/*------------------------------------------------*/

static void backup_cleanup(deng_t * eng)

{

backup_free_node("$ pdiff2_matched", eng->mlist ? eng->mlist->org_num : 0);

backup_free_node("$ pdiff2_identical", eng->ilist ? eng->ilist->org_num : 0);

backup_free_node("$ pdiff2_unmatched", eng->ulist ? eng->ulist->org_num : 0);

backup_free_node("$ pdiff2_eng", 1);

}

/*------------------------------------------------*/

/* function : backup_save_eng */

/* description:Saves engine data inside a netnode */

/*------------------------------------------------*/

static void backup_save_eng(const char *node_name, deng_t * eng)

{

char buf[1000];

char * file;

size_t pos = 0;

netnode node;

size_t msize, isize, usize;

node.create(node_name);

nodeidx_t nidx = node.altval(0);

if (nidx != 0)

{

backup_cleanup(eng);

node.create(node_name);

nidx = node.altval(0);

if (nidx != 0)

{

msg("backup eng failed: netnode already exists !!\n");

return;

}

netnode n(nidx);

n.create();

node.altset(0, n);

msize = isize = usize = 0;

if (eng->mlist)

{

file = eng->mlist->file;

msize = eng->mlist->num;

}

if (eng->ilist)

{

file = eng->ilist->file;

isize = eng->ilist->num;

}

if (eng->ulist)

{

file = eng->ulist->file;

usize = eng->ulist->num;

}

buffer_serialize_int(buf, sizeof(buf), &pos, PDIFF_BACKUP_VERSION);

buffer_serialize_string(buf, sizeof(buf), &pos, file);

buffer_serialize_size(buf, sizeof(buf), &pos, msize);

buffer_serialize_size(buf, sizeof(buf), &pos, isize);

buffer_serialize_size(buf, sizeof(buf), &pos, usize);

buffer_serialize_bool(buf, sizeof(buf), &pos, eng->opt->ipc);

n.setblob(buf, pos, 0, 'P');

}

/*------------------------------------------------*/

/* function : backup_load_file */

/* description:Loads engine data inside a netnode */

/*------------------------------------------------*/

static deng_t * backup_load_eng(const char *node_name, options_t * opt, int * version)

{

char buf[1000];

deng_t * eng;

char * file = NULL;

size_t blen, pos = 0;

netnode node;

size_t msize, isize, usize;

node.create(node_name);

nodeidx_t nidx = node.altval(0);

if (nidx == 0)

return NULL;

netnode n(nidx);

blen = sizeof(buf);

n.getblob(buf, &blen, 0, 'P');

if (!blen)

return NULL;

eng = (deng_t *)qalloc(sizeof(*eng));

if (!eng)

return NULL;

eng->magic = 0x0BADF00D;

eng->wnum = 0;

eng->opt = opt;

msize = isize = usize = 0;

buffer_unserialize_int(buf, sizeof(buf), &pos, version);

buffer_unserialize_string(buf, sizeof(buf), &pos, &file);

buffer_unserialize_size(buf, sizeof(buf), &pos, &msize);

buffer_unserialize_size(buf, sizeof(buf), &pos, &isize);

buffer_unserialize_size(buf, sizeof(buf), &pos, &usize);

buffer_unserialize_bool(buf, sizeof(buf), &pos, &eng->opt->ipc);

// no need to save that in the IDB

eng->opt->save_db = true;

eng->mlist = siglist_init(msize, file);

eng->ilist = siglist_init(isize, file);

eng->ulist = siglist_init(usize, file);

return eng;

}

/*------------------------------------------------*/

/* function : backup_save_results */

/* description: Saves diff results inside the */

/* IDB */

/*------------------------------------------------*/

void backup_save_results(deng_t * eng)

{

backup_save_eng("$ pdiff2_eng", eng);

backup_save_list("$ pdiff2_matched", eng->mlist);

backup_save_list("$ pdiff2_identical", eng->ilist);

backup_save_list("$ pdiff2_unmatched", eng->ulist);

}

/*------------------------------------------------*/

/* function : backup_load_results */

/* description: Loads diff results from the IDB */

/*------------------------------------------------*/

int backup_load_results(deng_t ** eng, options_t * opt)

{

int ret;

int version;

if (*eng)

{

ret = askbuttons_c("Reuse", "Refresh", "Cancel", 1,

"Previous diff results have been found. Please specify the action to perform.");

if (ret == 0)

{

diff_engine_free(*eng);

*eng = NULL;

}

return ret;

}

*eng = backup_load_eng("$ pdiff2_eng", opt, &version);

if (!(*eng)) return 0;

ret = askbuttons_c("Reuse", "Refresh", "Cancel", 1,

"Previous diff results have been found. Please specify the action to perform.");

if (ret != 1) goto error;

msg("Loading backup results... ");

if (!backup_load_list("$ pdiff2_matched", (*eng)->mlist, 1, version)) goto error;

if (!backup_load_list("$ pdiff2_identical", (*eng)->ilist, 1, version)) goto error;

if (!backup_load_list("$ pdiff2_unmatched", (*eng)->ulist, 0, version)) goto error;

msg("done.\n");

return ret;

error:

diff_engine_free(*eng);

*eng = NULL;

return ret;

}

patchdiff2/backup.cpp at master · filcab/patchdiff2 · GitHub

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