private static String convertToHex(byte[] arrayBytes) {
StringBuffer stringBuffer = new StringBuffer();
for (int i = 0; i < arrayBytes.length; i++) {
stringBuffer.append(Integer.toString((arrayBytes[i] & 0xff) + 0x100, 16).substring(1));
}
return stringBuffer.toString();
}
public static String getJavaStringLiteral(String text) {
StringBuffer buf = new StringBuffer();
buf.append('"');
int len = text.length();
for (int i = 0; i < len; i++) {
char ch = text.charAt(i);
switch (ch) {
case '\\':
buf.append("\\\\");
break;
case '\n':
buf.append("\\n");
break;
case '\r':
buf.append("\\r");
break;
case '\t':
buf.append("\\t");
break;
case '"':
buf.append("\\\"");
break;
default:
buf.append(ch);
break;
}
}
buf.append('"');
return buf.toString();
}
String[] getMedkit(
String[] availableResources,
String[] requiredResources,
String[] missions,
double P,
double C) {
try {
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec(exec);
OutputStream os = proc.getOutputStream();
InputStream is = proc.getInputStream();
new ErrorReader(proc.getErrorStream()).start();
StringBuffer sb = new StringBuffer();
append(sb, availableResources);
append(sb, requiredResources);
append(sb, missions);
sb.append(P).append('\n');
sb.append(C).append('\n');
os.write(sb.toString().getBytes());
BufferedReader br = new BufferedReader(new InputStreamReader(is));
int N = Integer.parseInt(br.readLine().trim());
String[] ret = new String[N];
for (int i = 0; i < N; i++) ret[i] = br.readLine().trim();
return ret;
} catch (Exception e) {
System.err.println("An error occurred while executing your program");
e.printStackTrace();
return null;
}
}
public static String[] split(String phrase) {
int length = phrase.length();
ArrayList wordList = new ArrayList();
StringBuffer word = null;
for (int i = 0; i < length; i++) {
char ch = phrase.charAt(i);
switch (ch) {
case ' ':
case '\t':
case '\r':
case '\n':
if (word != null) {
wordList.add(word.toString());
word = null;
}
break;
default:
if (word == null) {
word = new StringBuffer();
}
word.append(ch);
}
}
if (word != null) {
wordList.add(word.toString());
}
return (String[]) wordList.toArray(EMPTY_ARRAY);
}
public static String hex(byte[] array) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < array.length; ++i) {
sb.append(Integer.toHexString((array[i] & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString();
}
/**
* @param s
* @return
*/
public static String mask(final String s) {
final StringBuffer buffer = new StringBuffer(25);
final int count = (s != null ? s.length() : 0);
for (int n = 0; n < count; n++) {
buffer.append('*');
}
return buffer.toString();
}
public String getClassPath() {
StringBuffer cpath = new StringBuffer();
String sep = System.getProperty("path.separator");
for (int i = 0; i < jars.size(); i++) {
cpath.append((String) jars.elementAt(i) + sep);
}
return cpath.toString();
}
/** Transform the specified byte into a Hex String form. */
public static final String bytesToHexStr(byte[] bcd) {
StringBuffer s = new StringBuffer(bcd.length * 2);
for (int i = 0; i < bcd.length; i++) {
s.append(bcdLookup[(bcd[i] >>> 4) & 0x0f]);
s.append(bcdLookup[bcd[i] & 0x0f]);
}
return s.toString();
}
public static String getCryptUrl(String paramString) {
StringBuffer localStringBuffer = new StringBuffer(paramString);
if (paramString.indexOf("?") == -1) {
localStringBuffer.append("?");
} else {
localStringBuffer.append("&");
}
localStringBuffer.append("cyt=1");
return localStringBuffer.toString();
}
/** Return string representation of this VMID. */
public String toString() {
StringBuffer result = new StringBuffer();
if (addr != null)
for (int i = 0; i < addr.length; ++i) {
int x = (int) (addr[i] & 0xFF);
result.append((x < 0x10 ? "0" : "") + Integer.toString(x, 16));
}
result.append(':');
result.append(uid.toString());
return result.toString();
}
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append(getClass().getName());
sb.append('@');
sb.append(Integer.toHexString(System.identityHashCode(this)));
sb.append(" (context=");
sb.append(_context);
sb.append(", static_permitions=");
sb.append(_statisPermissions);
sb.append(')');
return sb.toString();
}
public ManifestDigester(byte bytes[]) {
rawBytes = bytes;
entries = new HashMap();
// first skip the main attributes
Position pos = new Position();
if (!findSection(0, pos)) return; // exception?
int start = pos.startOfNext;
while (findSection(start, pos)) {
int len = pos.endOfFirstLine - start + 1;
int sectionLen = pos.endOfSection - start + 1;
int sectionLenWithBlank = pos.startOfNext - start;
if (len > 6) {
if (isNameAttr(bytes, start)) {
StringBuffer nameBuf = new StringBuffer();
nameBuf.append(new String(bytes, start + 6, len - 6));
int i = start + len;
if ((i - start) < sectionLen) {
if (bytes[i] == '\r') {
i += 2;
} else {
i += 1;
}
}
while ((i - start) < sectionLen) {
if (bytes[i++] == ' ') {
// name is wrapped
int wrapStart = i;
while (((i - start) < sectionLen) && (bytes[i++] != '\n')) ;
if (bytes[i - 1] != '\n') return; // exception?
int wrapLen;
if (bytes[i - 2] == '\r') wrapLen = i - wrapStart - 2;
else wrapLen = i - wrapStart - 1;
nameBuf.append(new String(bytes, wrapStart, wrapLen));
} else {
break;
}
}
String name = nameBuf.toString();
entries.put(name, new Entry(start, sectionLen, sectionLenWithBlank, rawBytes));
}
}
start = pos.startOfNext;
}
}
/**
* Converts the given byte data into Hex string.
*
* @param data the byte array to convert
* @return the Hex string representation of the given byte array
*/
private static String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9)) buf.append((char) ('0' + halfbyte));
else buf.append((char) ('a' + (halfbyte - 10)));
halfbyte = data[i] & 0x0F;
} while (two_halfs++ < 1);
}
return buf.toString();
}
public static String Go(String rsa_len) throws NoSuchAlgorithmException {
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(Integer.valueOf(rsa_len));
byte[] publicKey = keyGen.genKeyPair().getPublic().getEncoded();
StringBuffer retString = new StringBuffer();
for (int i = 0; i < publicKey.length; ++i) {
retString.append(Integer.toHexString(0x0100 + (publicKey[i] & 0x00FF)).substring(1));
}
return retString.toString();
}
public static void main(String[] args) throws Exception {
//
// verifica args e recebe o texto plano
if (args.length != 1) {
System.err.println("Usage: java DigitalSignatureExample text");
System.exit(1);
}
byte[] plainText = args[0].getBytes("UTF8");
//
// gera o par de chaves RSA
System.out.println("\nStart generating RSA key");
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
keyGen.initialize(1024);
KeyPair key = keyGen.generateKeyPair();
System.out.println("Finish generating RSA key");
//
// define um objeto signature para utilizar MD5 e RSA
// e assina o texto plano com a chave privada,
// o provider utilizado tambem eh impresso
Signature sig = Signature.getInstance("MD5WithRSA");
sig.initSign(key.getPrivate());
sig.update(plainText);
byte[] signature = sig.sign();
System.out.println(sig.getProvider().getInfo());
System.out.println("\nSignature:");
// converte o signature para hexadecimal
StringBuffer buf = new StringBuffer();
for (int i = 0; i < signature.length; i++) {
String hex = Integer.toHexString(0x0100 + (signature[i] & 0x00FF)).substring(1);
buf.append((hex.length() < 2 ? "0" : "") + hex);
}
// imprime o signature em hexadecimal
System.out.println(buf.toString());
//
// verifica a assinatura com a chave publica
System.out.println("\nStart signature verification");
sig.initVerify(key.getPublic());
sig.update(plainText);
try {
if (sig.verify(signature)) {
System.out.println("Signature verified");
} else System.out.println("Signature failed");
} catch (SignatureException se) {
System.out.println("Singature failed");
}
}
static int appendMethodSignature(Class[] argTypes, Class returnType, StringBuffer sb) {
sb.append('(');
int firstLocal = 1 + argTypes.length; // includes this.
for (int i = 0; i < argTypes.length; i++) {
Class type = argTypes[i];
appendTypeString(sb, type);
if (type == Long.TYPE || type == Double.TYPE) {
// adjust for duble slot
++firstLocal;
}
}
sb.append(')');
appendTypeString(sb, returnType);
return firstLocal;
}
public static String toString(byte[] b) {
if (b == null) {
return "(null)";
}
StringBuffer sb = new StringBuffer(b.length * 3);
for (int i = 0; i < b.length; i++) {
int k = b[i] & 0xff;
if (i != 0) {
sb.append(':');
}
sb.append(hexDigits[k >>> 4]);
sb.append(hexDigits[k & 0xf]);
}
return sb.toString();
}
public static String getJavaIdentifier(String candidateID) {
int len = candidateID.length();
StringBuffer buf = new StringBuffer();
for (int i = 0; i < len; i++) {
char ch = candidateID.charAt(i);
boolean good =
i == 0 ? Character.isJavaIdentifierStart(ch) : Character.isJavaIdentifierPart(ch);
if (good) {
buf.append(ch);
} else {
buf.append('_');
}
}
return buf.toString();
}
// Other Functions
public static String encrypt(String pass) { // Encrypts password using MD5
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] passBytes = pass.getBytes();
md.reset();
byte[] digested = md.digest(passBytes);
StringBuffer sb = new StringBuffer();
for (int i = 0; i < digested.length; i++) {
sb.append(Integer.toHexString(0xff & digested[i]));
}
return sb.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
/*
* Utility method that converts a <code>URL[]</code> into a corresponding,
* space-separated string with the same array elements. Note that if the
* array has zero elements, the return value is null, not the empty string.
*/
private static String urlsToPath(URL[] urls) {
// TODO - check if spaces in file paths are properly escaped (i.e.%
// chars)
if (urls.length == 0) {
return null;
} else if (urls.length == 1) {
return urls[0].toExternalForm();
} else {
StringBuffer path = new StringBuffer(urls[0].toExternalForm());
for (int i = 1; i < urls.length; i++) {
path.append(' ');
path.append(urls[i].toExternalForm());
}
return path.toString();
}
}
/**
* 将byte数组转换为表示16进制值的字符串， 如：byte[]{8,18}转换为：0813， 和public static byte[] hexStr2ByteArr(String
* strIn) 互为可逆的转换过程
*
* @param arrB 需要转换的byte数组
* @return 转换后的字符串
* @throws Exception 本方法不处理任何异常，所有异常全部抛出
*/
public static String byteArr2HexStr(byte[] arrB) {
int iLen = arrB.length;
// 每个byte用两个字符才能表示，所以字符串的长度是数组长度的两倍
StringBuffer sb = new StringBuffer(iLen * 2);
for (int i = 0; i < iLen; i++) {
int intTmp = arrB[i];
// 把负数转换为正数
while (intTmp < 0) {
intTmp = intTmp + 256;
}
// 小于0F的数需要在前面补0
if (intTmp < 16) {
sb.append("0");
}
sb.append(Integer.toString(intTmp, 16));
}
return sb.toString();
}
/**
* readPEM: Read a PEM encoded base64 stream and decode it
*
* @param is Base64 PEM encoded stream
* @param hdr Header delimeter (e.g. ----------CERTIFICATE---------)
* @param ftr Footer delimeter (e.g. ----------END CERTIFICATE---------)
* @return decoded DER bytes
* @throws IOException if a read error occurs
*/
public static byte[] readPEM(InputStream is, String hdr, String ftr) throws IOException {
logger.debug("Reading PEM hdr:" + hdr + " ftr:" + ftr);
is.reset();
InputStreamReader irr = new InputStreamReader(is);
BufferedReader r = new BufferedReader(irr);
StringBuffer buff = new StringBuffer();
String line;
boolean read = false;
while ((line = r.readLine()) != null) {
if (line.equals(hdr)) {
read = true;
continue;
}
if (line.equals(ftr)) read = false;
if (read) buff.append(line);
}
return Base64.decode(buff.toString().getBytes());
}
/** Write certficate bytes into a PEM encoded string */
public static String writePEM(byte[] bytes, String hdr, String ftr) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
Base64OutputStream b64os = new Base64OutputStream(bos);
b64os.write(bytes);
b64os.flush();
b64os.close();
ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
InputStreamReader irr = new InputStreamReader(bis);
BufferedReader r = new BufferedReader(irr);
StringBuffer buff = new StringBuffer();
String line;
buff.append(hdr);
while ((line = r.readLine()) != null) {
buff.append(line + "\n");
}
buff.append(ftr);
return buff.toString();
}
/**
* Computing the hash for a method is useful so as to create an alternate key from the method name
* + signature.
*
* @param qualifiedMethodName
* @param methodSignature
* @return
*/
public static String computeHash(String qualifiedMethodName, String methodSignature) {
String fullMethodName = qualifiedMethodName + methodSignature;
byte[] bytes = fullMethodName.getBytes();
md5.reset();
md5.update(bytes);
byte[] messageBytes = md5.digest();
StringBuffer message = new StringBuffer();
for (byte aByte : messageBytes) {
String expanded = Integer.toHexString(0xFF & aByte);
if (expanded.length() == 1) {
// normalize length of all strings
message.append("0");
}
message.append(expanded);
}
return message.toString();
}
// encode password using md5
private String encodePassword(String pass) {
byte[] bytesOfMessage;
String unencodedpass = md5salt + pass;
String encodedpass = "";
try {
bytesOfMessage = unencodedpass.getBytes("UTF-8");
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] digest = md.digest(bytesOfMessage);
StringBuffer sb = new StringBuffer();
for (int i = 0; i < digest.length; ++i) {
sb.append(Integer.toHexString((digest[i] & 0xFF) | 0x100).substring(1, 3));
}
encodedpass = sb.toString();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return encodedpass;
}
private static StringBuffer appendTypeString(StringBuffer sb, Class type) {
while (type.isArray()) {
sb.append('[');
type = type.getComponentType();
}
if (type.isPrimitive()) {
char typeLetter;
if (type == Boolean.TYPE) {
typeLetter = 'Z';
} else if (type == Long.TYPE) {
typeLetter = 'J';
} else {
String typeName = type.getName();
typeLetter = Character.toUpperCase(typeName.charAt(0));
}
sb.append(typeLetter);
} else {
sb.append('L');
sb.append(type.getName().replace('.', '/'));
sb.append(';');
}
return sb;
}
public static String md5(String unhashed) {
String hashed = "";
byte[] defaultBytes = unhashed.getBytes();
try {
MessageDigest algorithm = MessageDigest.getInstance("MD5");
algorithm.reset();
algorithm.update(defaultBytes);
byte messageDigest[] = algorithm.digest();
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < messageDigest.length; i++) {
String hex = Integer.toHexString(0xFF & messageDigest[i]);
if (hex.length() == 1) {
hexString.append('0');
}
hexString.append(hex);
}
hashed = hexString.toString(); // messageDigest.toString();
} catch (NoSuchAlgorithmException nsae) {
}
return hashed;
}
/* Cert RQ info header */
private String buildRequestInfoHeader(String subject) {
StringBuffer buff =
new StringBuffer(
"This is a Certificate Request file:\nIt should be mailed to to a CA for signature");
buff.append("\n===============================================================");
buff.append("\nCertificate Subject:\n\t");
buff.append(subject);
buff.append("\n\n");
return buff.toString();
}
/** Returns the URL for the request */
public StringBuffer getRequestURL() {
StringBuffer sb = new StringBuffer();
sb.append(getScheme());
sb.append("://");
sb.append(getServerName());
int port = getServerPort();
if (port > 0 && port != 80 && port != 443) {
sb.append(":");
sb.append(port);
}
sb.append(getRequestURI());
return sb;
}
/*
* Initializes the signerInfo and the VerifierInfo from the Certificate Pair
*/
private void initializeCertificates() {
X509Certificate certRoot = null;
X509Certificate certIssuer = null;
CertificatePair trustedCertificate;
if (getFoundCertificate() == null) {
CertificatePair[] certs = getRootCertificates();
if (certs.length == 0) return;
trustedCertificate = certs[0];
} else {
trustedCertificate = getFoundCertificate();
}
certRoot = (X509Certificate) trustedCertificate.getRoot();
certIssuer = (X509Certificate) trustedCertificate.getIssuer();
StringBuffer strb = new StringBuffer();
strb.append(issuerString(certIssuer.getSubjectDN()));
strb.append("\r\n"); // $NON-NLS-1$
strb.append(
NLS.bind(
Messages.JarVerificationResult_ValidBetween,
(new String[] {
dateString(certIssuer.getNotBefore()), dateString(certIssuer.getNotAfter())
})));
strb.append(checkValidity(certIssuer));
signerInfo = strb.toString();
if (certIssuer != null && !certIssuer.equals(certRoot)) {
strb = new StringBuffer();
strb.append(issuerString(certIssuer.getIssuerDN()));
strb.append("\r\n"); // $NON-NLS-1$
strb.append(
NLS.bind(
Messages.JarVerificationResult_ValidBetween,
(new String[] {
dateString(certRoot.getNotBefore()), dateString(certRoot.getNotAfter())
})));
strb.append(checkValidity(certRoot));
verifierInfo = strb.toString();
}
}