1 files changed, 148 insertions, 0 deletions
diff --git a/twrpDigest.cpp b/twrpDigest.cpp
new file mode 100644
index 000000000..8380d2c8b
--- /dev/null
+++ b/twrpDigest.cpp
@@ -0,0 +1,148 @@
+/*
+	Copyright 2012 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 "gui/gui.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"
+
+using namespace std;
+
+void twrpDigest::setfn(string fn) {
+	md5fn = fn;
+}
+
+int twrpDigest::computeMD5(void) {
+	string line;
+	struct MD5Context md5c;
+	FILE *file;
+	int len;
+	unsigned char buf[1024];
+	MD5Init(&md5c);
+	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) {
+	int i;
+	string md5string, md5file;
+	char hex[3];
+	md5file = md5fn + ".md5";
+
+	for (i = 0; i < 16; ++i) {
+		snprintf(hex, 3, "%02x", md5sum[i]);
+		md5string += hex;
+	}
+	md5string += "  ";
+	md5string += basename((char*) md5fn.c_str());
+	md5string +=  + "\n";
+	TWFunc::write_file(md5file, md5string);
+	tw_set_default_metadata(md5file.c_str());
+	LOGINFO("MD5 for %s: %s\n", md5fn.c_str(), md5string.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_print("Skipping MD5 check: no MD5 file found\n");
+		return -1;
+	} else if (TWFunc::read_file(md5file, line) != 0) {
+		gui_print("Skipping MD5 check: MD5 file unreadable\n");
+		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 md5string;
+
+	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]);
+		md5string += hex;
+	}
+	if (tokens.at(0) != md5string) {
+		LOGERR("MD5 does not match\n");
+		return -2;
+	}
+
+	gui_print("MD5 matched\n");
+	return 0;
+}