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/*
Copyright 2012 to 2016 bigbiff/Dees_Troy TeamWin
This file is part of TWRP/TeamWin Recovery Project.
TWRP is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TWRP 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 TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
extern "C"
{
#include "digest/md5.h"
#include "libcrecovery/common.h"
}
#include <vector>
#include <string>
#include <sstream>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <string.h>
#include <libgen.h>
#include <errno.h>
#include <fcntl.h>
#include <fstream>
#include <sys/mman.h>
#include "twcommon.h"
#include "data.hpp"
#include "variables.h"
#include "twrp-functions.hpp"
#include "twrpDigest.hpp"
#include "set_metadata.h"
#include "gui/gui.hpp"
using namespace std;
void twrpDigest::setfn(const string& fn) {
md5fn = fn;
}
void twrpDigest::initMD5(void) {
MD5Init(&md5c);
md5string = "";
}
int twrpDigest::updateMD5stream(unsigned char* stream, int len) {
if (md5fn.empty()) {
MD5Update(&md5c, stream, len);
}
else {
return -1;
}
return 0;
}
void twrpDigest::finalizeMD5stream() {
MD5Final(md5sum, &md5c);
}
string twrpDigest::createMD5string() {
int i;
char hex[3];
for (i = 0; i < 16; ++i) {
snprintf(hex, 3, "%02x", md5sum[i]);
md5string += hex;
}
if (!md5fn.empty()) {
md5string += " ";
md5string += basename((char*) md5fn.c_str());
md5string += + "\n";
}
return md5string;
}
int twrpDigest::computeMD5(void) {
string line;
FILE *file;
int len;
unsigned char buf[1024];
initMD5();
file = fopen(md5fn.c_str(), "rb");
if (file == NULL)
return -1;
while ((len = fread(buf, 1, sizeof(buf), file)) > 0) {
MD5Update(&md5c, buf, len);
}
fclose(file);
MD5Final(md5sum, &md5c);
return 0;
}
int twrpDigest::write_md5digest(void) {
string md5file, md5str;
md5file = md5fn + ".md5";
md5str = createMD5string();
TWFunc::write_file(md5file, md5str);
tw_set_default_metadata(md5file.c_str());
LOGINFO("MD5 for %s: %s\n", md5fn.c_str(), md5str.c_str());
return 0;
}
int twrpDigest::read_md5digest(void) {
size_t i = 0;
bool foundMd5File = false;
string md5file = "";
vector<string> md5ext;
md5ext.push_back(".md5");
md5ext.push_back(".md5sum");
while (i < md5ext.size()) {
md5file = md5fn + md5ext[i];
if (TWFunc::Path_Exists(md5file)) {
foundMd5File = true;
break;
}
i++;
}
if (!foundMd5File) {
gui_msg("no_md5=Skipping MD5 check: no MD5 file found");
return -1;
} else if (TWFunc::read_file(md5file, line) != 0) {
LOGERR("Skipping MD5 check: MD5 file unreadable %s\n", strerror(errno));
return 1;
}
return 0;
}
/* verify_md5digest return codes:
-2: md5 did not match
-1: no md5 file found
0: md5 matches
1: md5 file unreadable
*/
int twrpDigest::verify_md5digest(void) {
string buf;
char hex[3];
int i, ret;
string md5str;
ret = read_md5digest();
if (ret != 0)
return ret;
stringstream ss(line);
vector<string> tokens;
while (ss >> buf)
tokens.push_back(buf);
computeMD5();
for (i = 0; i < 16; ++i) {
snprintf(hex, 3, "%02x", md5sum[i]);
md5str += hex;
}
if (tokens.at(0) != md5str) {
gui_err("md5_fail=MD5 does not match");
return -2;
}
gui_msg("md5_match=MD5 matched");
return 0;
}
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