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Fixed error reported in #357 for hex viewer not displaying correct hex values.

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This commit is contained in:
Brian Carrier 2013-11-22 13:46:12 -05:00
parent 189192e2e9
commit 6d35f89656
2 changed files with 86 additions and 60 deletions
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5
Core/src/org/sleuthkit/autopsy/corecomponents/DataContentViewerHex.java
View File

@ -299,7 +299,6 @@ public class DataContentViewerHex extends javax.swing.JPanel implements DataCont
currentPage = page;
long offset = (currentPage - 1) * pageLength;
// change the cursor to "waiting cursor" for this operation
this.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
@ -344,13 +343,13 @@ public class DataContentViewerHex extends javax.swing.JPanel implements DataCont
// set the output view
if (errorText == null) {
int showLength = bytesRead < pageLength ? bytesRead : (int) pageLength;
outputViewPane.setText(DataConversion.byteArrayToHex(data, showLength, offset, outputViewPane.getFont()));
outputViewPane.setText(DataConversion.byteArrayToHex(data, showLength, offset));
}
else {
outputViewPane.setText(errorText);
}
outputViewPane.moveCaretPosition(0);
outputViewPane.setCaretPosition(0);
this.setCursor(null);
}

141
Core/src/org/sleuthkit/autopsy/datamodel/DataConversion.java
View File

@ -20,79 +20,106 @@ package org.sleuthkit.autopsy.datamodel;
import java.awt.Font;
import java.util.Arrays;
import java.util.Formatter;
/**
* Helper methods for converting data.
*/
public class DataConversion {
public static String byteArrayToHex(byte[] array, int length, long offset, Font font) {
final private static char[] hexArray = "0123456789ABCDEF".toCharArray();
/**
* Return the hex-dump layout of the passed in byte array.
* Deprecated because we don't need font
* @param array Data to display
* @param length Amount of data in array to display
* @param arrayOffset Offset of where data in array begins as part of a bigger file (used for arrayOffset column)
* @param font Font that will be used to display the text
* @return
*/
@Deprecated
public static String byteArrayToHex(byte[] array, int length, long arrayOffset, Font font) {
return byteArrayToHex(array, length, arrayOffset);
}
/**
* Return the hex-dump layout of the passed in byte array.
* @param array Data to display
* @param length Amount of data in array to display
* @param arrayOffset Offset of where data in array begins as part of a bigger file (used for arrayOffset column)
* @return
*/
public static String byteArrayToHex(byte[] array, int length, long arrayOffset) {
if (array == null) {
return "";
} else {
String base = new String(array, 0, length);
}
else {
StringBuilder outputStringBuilder = new StringBuilder();
// loop through the file in 16-byte increments
for (int curOffset = 0; curOffset < length; curOffset += 16) {
// how many bytes are we displaying on this line
int lineLen = 16;
if (length - curOffset < 16) {
lineLen = length - curOffset;
}
// print the offset column
//outputStringBuilder.append("0x");
outputStringBuilder.append(String.format("0x%08x: ", arrayOffset + curOffset));
//outputStringBuilder.append(": ");
StringBuilder buff = new StringBuilder();
int count = 0;
int extra = base.length() % 16;
String sub = "";
char subchar;
//commented out code can be used as a base for generating hex length based on
//offset/length/file size
//String hex = Long.toHexString(length + offset);
//double hexMax = Math.pow(16, hex.length());
double hexMax = Math.pow(16, 6);
while (count < base.length() - extra) {
buff.append("0x");
buff.append(Long.toHexString((long) (offset + count + hexMax)).substring(1));
buff.append(": ");
// print the hex columns
for (int i = 0; i < 16; i++) {
buff.append(Integer.toHexString((((int) base.charAt(count + i)) & 0xff) + 256).substring(1).toUpperCase());
buff.append(" ");
if (i == 7) {
buff.append(" ");
if (i < lineLen) {
int v = array[curOffset + i] & 0xFF;
outputStringBuilder.append(hexArray[v >>> 4]);
outputStringBuilder.append(hexArray[v & 0x0F]);
}
else {
outputStringBuilder.append(" ");
}
// someday we'll offer the option of these two styles...
if (true) {
outputStringBuilder.append(" ");
if (i % 4 == 3) {
outputStringBuilder.append(" ");
}
if (i == 7) {
outputStringBuilder.append(" ");
}
}
// xxd style
else {
if (i % 2 == 1) {
outputStringBuilder.append(" ");
}
}
}
sub = base.substring(count, count + 16);
outputStringBuilder.append(" ");
// print the ascii columns
String ascii = new String(array, curOffset, lineLen);
for (int i = 0; i < 16; i++) {
subchar = sub.charAt(i);
if (!font.canDisplay(subchar)) {
sub.replace(subchar, '.');
}
// replace all unprintable characters with "."
int dec = (int) subchar;
if (dec < 32 || dec > 126) {
sub = sub.replace(subchar, '.');
char c = ' ';
if (i < lineLen) {
c = ascii.charAt(i);
int dec = (int) c;
if (dec < 32 || dec > 126) {
c = '.';
}
}
outputStringBuilder.append(c);
}
buff.append(" " + sub + "\n");
count += 16;
outputStringBuilder.append("\n");
}
if (base.length() % 16 != 0) {
buff.append("0x" + Long.toHexString((long) (offset + count + hexMax)).substring(1) + ": ");
}
for (int i = 0; i < 16; i++) {
if (i < extra) {
buff.append(Integer.toHexString((((int) base.charAt(count + i)) & 0xff) + 256).substring(1) + " ");
} else {
buff.append(" ");
}
if (i == 7) {
buff.append(" ");
}
}
sub = base.substring(count, count + extra);
for (int i = 0; i < extra; i++) {
subchar = sub.charAt(i);
if (!font.canDisplay(subchar)) {
sub.replace(subchar, '.');
}
}
buff.append(" " + sub);
return buff.toString();
return outputStringBuilder.toString();
}
}