@Override
protected HashMap<String, String> doInBackground(File... params) {
HashMap<String, String> digest = new HashMap<String, String>();
File file = params[0];
MessageDigest md5 = null;
MessageDigest sha1 = null;
CRC32 crc32 = null;
InputStream is = null;
try {
md5 = MessageDigest.getInstance("MD5");
sha1 = MessageDigest.getInstance("SHA1");
crc32 = new CRC32();
is = new FileInputStream(file);
int count = 0;
byte buffer[] = new byte[24 * 1024];
while ((count = is.read(buffer)) > 0) {
md5.update(buffer, 0, count);
sha1.update(buffer, 0, count);
crc32.update(buffer, 0, count);
}
StringBuilder md5Builder = new StringBuilder();
for (byte b : md5.digest()) {
String hex = Integer.toHexString(0xFF & b);
if (hex.length() == 2) md5Builder.append(hex);
else md5Builder.append("0" + hex);
logger.debug(hex);
}
digest.put("MD5", md5Builder.toString());
StringBuilder sha1Builder = new StringBuilder();
for (byte b : sha1.digest()) {
String hex = Integer.toHexString(0xFF & b);
if (hex.length() == 2) sha1Builder.append(hex);
else sha1Builder.append("0" + hex);
logger.debug(hex);
}
digest.put("SHA1", sha1Builder.toString());
digest.put("CRC", Long.toString(crc32.getValue()));
return digest;
} catch (Exception e) {
digest.put("MD5", "Unable to read md5sum.");
digest.put("SHA1", "Unable to read sha1sum.");
digest.put("CRC", "Unable to read sha1sum.");
return digest;
} finally {
try {
is.close();
} catch (Exception e) {
}
}
}
public class DigestExtractor extends AsyncTask<File, Void, HashMap<String, String>> {
private Logger logger = Logger.getLogger(DigestExtractor.class.getName());
private Context context;
public static final String MD5 = "MD5";
public static final String SHA1 = "SHA1";
public static final String CRC = "CRC";
public DigestExtractor(Context context) {
this.context = context;
}
@Override
protected HashMap<String, String> doInBackground(File... params) {
HashMap<String, String> digest = new HashMap<String, String>();
File file = params[0];
MessageDigest md5 = null;
MessageDigest sha1 = null;
CRC32 crc32 = null;
InputStream is = null;
try {
md5 = MessageDigest.getInstance("MD5");
sha1 = MessageDigest.getInstance("SHA1");
crc32 = new CRC32();
is = new FileInputStream(file);
int count = 0;
byte buffer[] = new byte[24 * 1024];
while ((count = is.read(buffer)) > 0) {
md5.update(buffer, 0, count);
sha1.update(buffer, 0, count);
crc32.update(buffer, 0, count);
}
StringBuilder md5Builder = new StringBuilder();
for (byte b : md5.digest()) {
String hex = Integer.toHexString(0xFF & b);
if (hex.length() == 2) md5Builder.append(hex);
else md5Builder.append("0" + hex);
logger.debug(hex);
}
digest.put("MD5", md5Builder.toString());
StringBuilder sha1Builder = new StringBuilder();
for (byte b : sha1.digest()) {
String hex = Integer.toHexString(0xFF & b);
if (hex.length() == 2) sha1Builder.append(hex);
else sha1Builder.append("0" + hex);
logger.debug(hex);
}
digest.put("SHA1", sha1Builder.toString());
digest.put("CRC", Long.toString(crc32.getValue()));
return digest;
} catch (Exception e) {
digest.put("MD5", "Unable to read md5sum.");
digest.put("SHA1", "Unable to read sha1sum.");
digest.put("CRC", "Unable to read sha1sum.");
return digest;
} finally {
try {
is.close();
} catch (Exception e) {
}
}
}
@Override
protected void onPostExecute(HashMap<String, String> result) {
LocalBroadcastManager.getInstance(context)
.sendBroadcastSync(
wrapIntent(
ViewerActivity.VA_SHOW_FILE_CHECKSUMS,
MD5,
result.get(MD5),
SHA1,
result.get(SHA1),
CRC,
result.get(CRC)));
}
private Intent wrapIntent(String action, Object... extras) {
Intent intent = new Intent(context, ViewerActivity.class);
intent.setAction(action);
for (int i = 0; i < (extras.length / 2); i++) {
String key = (String) extras[(2 * i)];
Object value = extras[(2 * i) + 1];
if (value instanceof String) intent.putExtra(key, (String) value);
else if (value instanceof Integer) intent.putExtra(key, (Integer) value);
else if (value instanceof Long) intent.putExtra(key, (Long) value);
else if (value instanceof Boolean) intent.putExtra(key, (Boolean) value);
}
return intent;
}
}
