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clean up weird tabs, etc

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This commit is contained in:
Glenn Maynard
2005-05-20 02:44:54 +00:00
parent ab723147bd
commit 25979e1c58
1 changed files with 84 additions and 86 deletions
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stepmania/src/verify_signature/java/VerifySignature.java
+84 -86
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@@ -4,15 +4,16 @@
// data_file - the data file whose signature to verify
// signature - the signature of data_file in binary format
/** <p>Title: RSA Security</p>
* Description: This class generates a RSA private and public key, reinstantiates
* the keys from the corresponding key files.It also generates compatible .Net Public Key,
* which we will read later in C# program using .Net Securtiy Framework
* The reinstantiated keys are used to sign and verify the given data.</p>
*
* @author Shaheryar
* @version 1.0
*/
/*
* Title: RSA Security
* Description: This class generates a RSA private and public key, reinstantiates
* the keys from the corresponding key files. It also generates compatible .Net Public Key,
* which we will read later in C# program using .Net Securtiy Framework
* The reinstantiated keys are used to sign and verify the given data.</p>
*
* @author Shaheryar
* @version 1.0
*/
import java.security.*;
import java.security.spec.*;
@@ -25,63 +26,60 @@ import javax.xml.transform.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
public class VerifySignature {
private KeyPairGenerator keyGen; //Key pair generator for RSA
public PrivateKey privateKey; // Private Key Class
public PublicKey publicKey; // Public Key Class
public class VerifySignature
{
private KeyPairGenerator keyGen; // Key pair generator for RSA
public PrivateKey privateKey; // Private Key Class
public PublicKey publicKey; // Public Key Class
public KeyPair keypair; // KeyPair Class
private Signature sign; // Signature, used to sign the data
/**
* Default Constructor. Instantiates the key paths and signature algorithm.
*/
public VerifySignature() {
try {
//Get the instance of Signature Engine.
private Signature sign; // Signature, used to sign the data
/* Instantiates the key paths and signature algorithm. */
public VerifySignature()
{
try {
// Get the instance of Signature Engine.
sign = Signature.getInstance("SHA1withRSA");
}
catch (NoSuchAlgorithmException nsa) {
System.out.println("" + nsa.getMessage());
System.out.println("" + nsa.getMessage());
}
}
/**
* Initializes the public and private keys.
*/
private void initializePublicKey(String publickey_fn) {
try {
//Read key files back and decode them from BASE64
/* Initialize the public and private keys. */
private void initializePublicKey(String publickey_fn)
{
try
{
// Read key files back and decode them from BASE64
byte[] publicKeyBytes = readKeyBytesFromFile(publickey_fn);
// Convert back to public and private key objects
// Convert back to public and private key objects
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes);
publicKey = keyFactory.generatePublic(publicKeySpec);
publicKey = keyFactory.generatePublic(publicKeySpec);
}
catch (IOException io) {
System.out.println(
"Public/ Private Key File Not found."+ io.getCause());
"Public/Private key file not found."+ io.getCause());
}
catch (InvalidKeySpecException e) {
System.out.println(
"Invalid Key Specs. Not valid Key files."+ e.getCause());
System.out.println( "Invalid Key Specs. Not valid key files."+ e.getCause() );
}
catch (NoSuchAlgorithmException e) {
System.out.println(
"There is no such algorithm. Please check the JDK ver."+ e.getCause());
System.out.println( "There is no such algorithm. Please check the JDK ver."+ e.getCause() );
}
}
/**
* Verifies the signature for the given bytes using the public key.
* @param signature Signature
* @param data Data that was signed
/*
* Verifies the signature for the given bytes using the public key.
* @param signature Signature
* @param data Data that was signed
* @return boolean True if valid signature else false
*/
public boolean verifySignature(String publickey_fn, byte[] signature, byte[] data) {
try {
public boolean verifySignature(String publickey_fn, byte[] signature, byte[] data)
{
try
{
initializePublicKey(publickey_fn);
sign.initVerify(publicKey);
sign.update(data);
@@ -97,26 +95,27 @@ public class VerifySignature {
}
/**
* Returns the contents of the file in a byte array.
* @param fileName File Name
* @return byte[] Teh data read from a given file as a byte array.
* Returns the contents of the file in a byte array.
* @param fileName File Name
* @return byte[] The data read from a given file as a byte array.
*/
private byte[] readKeyBytesFromFile(String fileName) throws IOException{
File file = new File(fileName);
private byte[] readKeyBytesFromFile(String fileName) throws IOException
{
File file = new File(fileName);
InputStream is = new FileInputStream(file);
// Get the size of the file
long length = file.length();
long length = ile.length();
// You cannot create an array using a long type.
// It needs to be an int type.
// Before converting to an int type, check
// to ensure that file is not larger than Integer.MAX_VALUE.
// You cannot create an array using a long type.
// It needs to be an int type.
// Before converting to an int type, check
// to ensure that file is not larger than Integer.MAX_VALUE.
if (length > Integer.MAX_VALUE) {
// File is too large
}
// Create the byte array to hold the data
// Create the byte array to hold the data
byte[] bytes = new byte[ (int) length];
// Read in the bytes
@@ -127,20 +126,18 @@ public class VerifySignature {
offset += numRead;
}
// Ensure all the bytes have been read in
// Ensure all the bytes have been read in
if (offset < bytes.length) {
throw new IOException("Key File Error: Could not completely read file " + file.getName());
throw new IOException("Key File Error: Could not completely read file " + file.getName());
}
// Close the input stream and return bytes
// Close the input stream and return bytes
is.close();
return bytes;
}
public static void main(String args[])
public static void main(String args[])
{
VerifySignature sm = new VerifySignature();
@@ -149,13 +146,12 @@ public class VerifySignature {
Afterwards,the application will read the generated key files from the given location.
If you want to generate the key files each time, then you should keep it uncommented always.
*/
if( args.length != 3 )
if( args.length != 3 )
{
System.out.println("\nUsage: RSAPubKeyData.exe publickey_fn data_fn signature_fn");
return;
}
String publickeyfn = args[0];
String datafn = args[1];
String signaturefn = args[2];
@@ -178,44 +174,46 @@ public class VerifySignature {
{
try
{
File file = new File(fileName);
File file = new File(fileName);
InputStream is = new FileInputStream(file);
// Get the size of the file
long length = file.length();
long length = file.length();
// You cannot create an array using a long type.
// It needs to be an int type.
// Before converting to an int type, check
// to ensure that file is not larger than Integer.MAX_VALUE.
// You cannot create an array using a long type.
// It needs to be an int type.
// Before converting to an int type, check
// to ensure that file is not larger than Integer.MAX_VALUE.
if (length > Integer.MAX_VALUE) {
// File is too large
}
// Create the byte array to hold the data
// Create the byte array to hold the data
byte[] bytes = new byte[ (int) length];
// Read in the bytes
int offset = 0;
int numRead = 0;
while (offset < bytes.length
&& (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
offset += numRead;
}
int numRead = 0;
while (offset < bytes.length
&& (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0)
{
offset += numRead;
}
// Ensure all the bytes have been read in
if (offset < bytes.length) {
throw new IOException("Key File Error: Could not completely read file " + file.getName());
}
// Ensure all the bytes have been read in
if (offset < bytes.length) {
throw new IOException("Key File Error: Could not completely read file " + file.getName());
}
// Close the input stream and return bytes
is.close();
return bytes;
}catch(IOException ioe)
{
System.out.println("Exception occured while writing file"+ioe.getMessage());
// Close the input stream and return bytes
is.close();
return bytes;
}
byte[] bytes = new byte[ 1];
catch(IOException ioe)
{
System.out.println("Exception occured while writing file"+ioe.getMessage());
}
byte[] bytes = new byte[1];
return bytes;
}
}
}