487 * instance we actually use. It opens the entropy gathering device
488 * which will supply the randomness.
489 */
490
491 URLSeedGenerator(String egdurl) throws IOException {
492 if (egdurl == null) {
493 throw new IOException("No random source specified");
494 }
495 deviceName = egdurl;
496 init();
497 }
498
499 private void init() throws IOException {
500 final URL device = new URL(deviceName);
501 try {
502 seedStream = java.security.AccessController.doPrivileged
503 (new java.security.PrivilegedExceptionAction<InputStream>() {
504 @Override
505 public InputStream run() throws IOException {
506 /*
507 * return a FileInputStream for file URLs and
508 * avoid buffering. The openStream() call wraps
509 * InputStream in a BufferedInputStream which
510 * can buffer up to 8K bytes. This read is a
511 * performance issue for entropy sources which
512 * can be slow to replenish.
513 */
514 if (device.getProtocol().equalsIgnoreCase("file")) {
515 File deviceFile =
516 SunEntries.getDeviceFile(device);
517 return new FileInputStream(deviceFile);
518 } else {
519 return device.openStream();
520 }
521 }
522 });
523 } catch (Exception e) {
524 throw new IOException(
525 "Failed to open " + deviceName, e.getCause());
526 }
527 }
528
529 @Override
530 void getSeedBytes(byte[] result) {
531 int len = result.length;
532 int read = 0;
533 try {
534 while (read < len) {
535 int count = seedStream.read(result, read, len - read);
536 // /dev/random blocks - should never have EOF
537 if (count < 0) {
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487 * instance we actually use. It opens the entropy gathering device
488 * which will supply the randomness.
489 */
490
491 URLSeedGenerator(String egdurl) throws IOException {
492 if (egdurl == null) {
493 throw new IOException("No random source specified");
494 }
495 deviceName = egdurl;
496 init();
497 }
498
499 private void init() throws IOException {
500 final URL device = new URL(deviceName);
501 try {
502 seedStream = java.security.AccessController.doPrivileged
503 (new java.security.PrivilegedExceptionAction<InputStream>() {
504 @Override
505 public InputStream run() throws IOException {
506 /*
507 * return a shared InputStream from FileInputStreamPool
508 * for file URLs and avoid buffering.
509 * The URL.openStream() call wraps
510 * InputStream in a BufferedInputStream which
511 * can buffer up to 8K bytes. This read is a
512 * performance issue for entropy sources which
513 * can be slow to replenish.
514 */
515 if (device.getProtocol().equalsIgnoreCase("file")) {
516 File deviceFile =
517 SunEntries.getDeviceFile(device);
518 return FileInputStreamPool.getInputStream(deviceFile);
519 } else {
520 return device.openStream();
521 }
522 }
523 });
524 } catch (Exception e) {
525 throw new IOException(
526 "Failed to open " + deviceName, e.getCause());
527 }
528 }
529
530 @Override
531 void getSeedBytes(byte[] result) {
532 int len = result.length;
533 int read = 0;
534 try {
535 while (read < len) {
536 int count = seedStream.read(result, read, len - read);
537 // /dev/random blocks - should never have EOF
538 if (count < 0) {
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