private Class<?> getClassFromStream(
final InputStream stream, final String classname, final File container)
throws IOException, SecurityException {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
int bytesRead = -1;
final byte[] buffer = new byte[8192];
while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
baos.write(buffer, 0, bytesRead);
}
final byte[] classData = baos.toByteArray();
return this.defineClassFromData(container, classData, classname);
}
/** 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();
}
/**
* Read from the stream until length bytes have been read or EOF has been reached. Return the
* number of bytes actually read.
*/
private static int readFully(InputStream in, ByteArrayOutputStream bout, int length)
throws IOException {
int read = 0;
byte[] buffer = new byte[2048];
while (length > 0) {
int n = in.read(buffer, 0, length < 2048 ? length : 2048);
if (n <= 0) {
break;
}
bout.write(buffer, 0, n);
read += n;
length -= n;
}
return read;
}
/**
* Generates a Payment message based on the information in the PaymentRequest. Provide
* transactions built by the wallet. If the PaymentRequest did not specify a payment_url, returns
* null.
*
* @param txns list of transactions to be included with the Payment message.
* @param refundAddr will be used by the merchant to send money back if there was a problem.
* @param memo is a message to include in the payment message sent to the merchant.
*/
public @Nullable Protos.Payment getPayment(
List<Transaction> txns, @Nullable Address refundAddr, @Nullable String memo)
throws IOException {
if (!paymentDetails.hasPaymentUrl()) return null;
Protos.Payment.Builder payment = Protos.Payment.newBuilder();
if (paymentDetails.hasMerchantData()) payment.setMerchantData(paymentDetails.getMerchantData());
if (refundAddr != null) {
Protos.Output.Builder refundOutput = Protos.Output.newBuilder();
refundOutput.setAmount(totalValue.longValue());
refundOutput.setScript(
ByteString.copyFrom(ScriptBuilder.createOutputScript(refundAddr).getProgram()));
payment.addRefundTo(refundOutput);
}
if (memo != null) {
payment.setMemo(memo);
}
for (Transaction txn : txns) {
txn.verify();
ByteArrayOutputStream o = new ByteArrayOutputStream();
txn.bitcoinSerialize(o);
payment.addTransactions(ByteString.copyFrom(o.toByteArray()));
}
return payment.build();
}
/**
* Read one BER data block. This method is aware of indefinite-length BER encoding and will read
* all of the sub-sections in a recursive way
*
* @param is Read from this InputStream
* @param bout Write into this OutputStream
* @param tag Tag already read (-1 mean not read)
* @returns The current tag, used to check EOC in indefinite-length BER
* @throws IOException Any parsing error
*/
private static int readBERInternal(InputStream is, ByteArrayOutputStream bout, int tag)
throws IOException {
if (tag == -1) { // Not read before the call, read now
tag = is.read();
if (tag == -1) {
throw new IOException("BER/DER tag info absent");
}
if ((tag & 0x1f) == 0x1f) {
throw new IOException("Multi octets tag not supported");
}
bout.write(tag);
}
int n = is.read();
if (n == -1) {
throw new IOException("BER/DER length info ansent");
}
bout.write(n);
int length;
if (n == 0x80) { // Indefinite-length encoding
if ((tag & 0x20) != 0x20) {
throw new IOException("Non constructed encoding must have definite length");
}
while (true) {
int subTag = readBERInternal(is, bout, -1);
if (subTag == 0) { // EOC, end of indefinite-length section
break;
}
}
} else {
if (n < 0x80) {
length = n;
} else if (n == 0x81) {
length = is.read();
if (length == -1) {
throw new IOException("Incomplete BER/DER length info");
}
bout.write(length);
} else if (n == 0x82) {
int highByte = is.read();
int lowByte = is.read();
if (lowByte == -1) {
throw new IOException("Incomplete BER/DER length info");
}
bout.write(highByte);
bout.write(lowByte);
length = (highByte << 8) | lowByte;
} else if (n == 0x83) {
int highByte = is.read();
int midByte = is.read();
int lowByte = is.read();
if (lowByte == -1) {
throw new IOException("Incomplete BER/DER length info");
}
bout.write(highByte);
bout.write(midByte);
bout.write(lowByte);
length = (highByte << 16) | (midByte << 8) | lowByte;
} else if (n == 0x84) {
int highByte = is.read();
int nextByte = is.read();
int midByte = is.read();
int lowByte = is.read();
if (lowByte == -1) {
throw new IOException("Incomplete BER/DER length info");
}
if (highByte > 127) {
throw new IOException("Invalid BER/DER data (a little huge?)");
}
bout.write(highByte);
bout.write(nextByte);
bout.write(midByte);
bout.write(lowByte);
length = (highByte << 24) | (nextByte << 16) | (midByte << 8) | lowByte;
} else { // ignore longer length forms
throw new IOException("Invalid BER/DER data (too huge?)");
}
if (readFully(is, bout, length) != length) {
throw new IOException("Incomplete BER/DER data");
}
}
return tag;
}
/**
* Returns an ASN.1 SEQUENCE from a stream, which might be a BER-encoded binary block or a
* PEM-style BASE64-encoded ASCII data. In the latter case, it's de-BASE64'ed before return.
*
* <p>After the reading, the input stream pointer is after the BER block, or after the newline
* character after the -----END SOMETHING----- line.
*
* @param is the InputStream
* @returns byte block or null if end of stream
* @throws IOException If any parsing error
*/
private static byte[] readOneBlock(InputStream is) throws IOException {
// The first character of a BLOCK.
int c = is.read();
if (c == -1) {
return null;
}
if (c == DerValue.tag_Sequence) {
ByteArrayOutputStream bout = new ByteArrayOutputStream(2048);
bout.write(c);
readBERInternal(is, bout, c);
return bout.toByteArray();
} else {
// Read BASE64 encoded data, might skip info at the beginning
char[] data = new char[2048];
int pos = 0;
// Step 1: Read until header is found
int hyphen = (c == '-') ? 1 : 0; // count of consequent hyphens
int last = (c == '-') ? -1 : c; // the char before hyphen
while (true) {
int next = is.read();
if (next == -1) {
// We accept useless data after the last block,
// say, empty lines.
return null;
}
if (next == '-') {
hyphen++;
} else {
hyphen = 0;
last = next;
}
if (hyphen == 5 && (last == -1 || last == '\r' || last == '\n')) {
break;
}
}
// Step 2: Read the rest of header, determine the line end
int end;
StringBuffer header = new StringBuffer("-----");
while (true) {
int next = is.read();
if (next == -1) {
throw new IOException("Incomplete data");
}
if (next == '\n') {
end = '\n';
break;
}
if (next == '\r') {
next = is.read();
if (next == -1) {
throw new IOException("Incomplete data");
}
if (next == '\n') {
end = '\n';
} else {
end = '\r';
data[pos++] = (char) next;
}
break;
}
header.append((char) next);
}
// Step 3: Read the data
while (true) {
int next = is.read();
if (next == -1) {
throw new IOException("Incomplete data");
}
if (next != '-') {
data[pos++] = (char) next;
if (pos >= data.length) {
data = Arrays.copyOf(data, data.length + 1024);
}
} else {
break;
}
}
// Step 4: Consume the footer
StringBuffer footer = new StringBuffer("-");
while (true) {
int next = is.read();
// Add next == '\n' for maximum safety, in case endline
// is not consistent.
if (next == -1 || next == end || next == '\n') {
break;
}
if (next != '\r') footer.append((char) next);
}
checkHeaderFooter(header.toString(), footer.toString());
return Base64.getMimeDecoder().decode(new String(data, 0, pos));
}
}
