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// --- BEGIN COPYRIGHT BLOCK ---
// This program 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; version 2 of the License.
//
// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.cmstools;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import com.netscape.cmsutil.util.Utils;
/**
* The AtoB class is a utility program designed to "translate" an ASCII
* BASE 64 encoded blob into a BINARY BASE 64 encoded blob. It assumes
* that the name of a data file is passed to the program via the command line,
* and that the contents contain a blob encoded in an ASCII BASE 64
* format. Note that the data file may contain an optional "-----BEGIN" header
* and/or an optional "-----END" trailer.
*
* <P>
* The program may be invoked as follows:
*
* <PRE>
*
* AtoB <input filename> <output filename>
*
* NOTE: <input filename> must contain an ASCII
* BASE 64 encoded blob
*
* <output filename> contains a BINARY
* BASE 64 encoded blob
* </PRE>
*
* @version $Revision$, $Date$
*/
public class AtoB {
// Define constants
public static final int ARGC = 2;
public static final String HEADER = "-----BEGIN";
public static final String TRAILER = "-----END";
public static void main(String argv[]) {
BufferedReader inputBlob = null;
String asciiBASE64BlobChunk;
StringBuffer asciiBASE64Blob = new StringBuffer();
byte binaryBASE64Blob[] = null;
FileOutputStream outputBlob = null;
// (1) Check that two arguments were submitted to the program
if (argv.length != ARGC) {
System.out.println("Usage: AtoB " +
"<input filename> " +
"<output filename>");
return;
}
// (2) Create a DataInputStream() object to the BASE 64
// encoded blob contained within the file
// specified on the command line
try {
inputBlob = new BufferedReader(new InputStreamReader(
new BufferedInputStream(
new FileInputStream(
argv[0]))));
} catch (FileNotFoundException e) {
System.out.println("AtoB(): can''t find file " +
argv[0] + ":\n" + e);
return;
}
// (3) Read the entire contents of the specified BASE 64 encoded
// blob into a String() object throwing away any
// headers beginning with HEADER and any trailers beginning
// with TRAILER
try {
while ((asciiBASE64BlobChunk = inputBlob.readLine()) != null) {
if (!(asciiBASE64BlobChunk.startsWith(HEADER)) &&
!(asciiBASE64BlobChunk.startsWith(TRAILER))) {
asciiBASE64Blob.append(asciiBASE64BlobChunk.trim());
}
}
} catch (IOException e) {
System.out.println("AtoB(): Unexpected BASE64 " +
"encoded error encountered in readLine():\n" +
e);
}
// (4) Close the DataInputStream() object
try {
inputBlob.close();
} catch (IOException e) {
System.out.println("AtoB(): Unexpected BASE64 " +
"encoded error encountered in close():\n" + e);
}
// (5) Decode the ASCII BASE 64 blob enclosed in the
// String() object into a BINARY BASE 64 byte[] object
binaryBASE64Blob = Utils.base64decode(asciiBASE64Blob.toString());
// (6) Finally, print the actual AtoB blob to the
// specified output file
try {
outputBlob = new FileOutputStream(argv[1]);
} catch (IOException e) {
System.out.println("AtoB(): unable to open file " +
argv[1] + " for writing:\n" + e);
return;
}
try {
outputBlob.write(binaryBASE64Blob);
} catch (IOException e) {
System.out.println("AtoB(): I/O error " +
"encountered during write():\n" +
e);
}
try {
outputBlob.close();
} catch (IOException e) {
System.out.println("AtoB(): Unexpected error " +
"encountered while attempting to close() " +
argv[1] + ":\n" + e);
}
}
}
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