use md5.c for computation of md5sums
create a framework for computing digests and reading digests in TWRP
add space for backwards compatibility with bb md5sum
Change-Id: Ia18e3f430eed5eba22e5052d39b9b8d88ecd4536
diff --git a/twrpDigest.cpp b/twrpDigest.cpp
new file mode 100644
index 0000000..16cda3d
--- /dev/null
+++ b/twrpDigest.cpp
@@ -0,0 +1,112 @@
+/*
+ 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 "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 <iostream>
+#include <string>
+#include <sstream>
+#include <dirent.h>
+#include <sys/mman.h>
+#include "common.h"
+#include "data.hpp"
+#include "variables.h"
+#include "twrp-functions.hpp"
+#include "twrpDigest.hpp"
+
+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);
+ }
+ 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);
+ return 0;
+}
+
+int twrpDigest::read_md5digest(void) {
+ string md5file = md5fn + ".md5";
+ if (TWFunc::read_file(md5file, lines) != 0)
+ return -1;
+ return 0;
+}
+
+int twrpDigest::verify_md5digest(void) {
+ string buf;
+ char hex[3];
+ int i;
+ string md5string;
+
+ if (read_md5digest() != 0)
+ return -1;
+ stringstream ss(lines.at(0));
+ 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)
+ return -2;
+ return 0;
+}