public static MD5InputStreamResult generateMD5Result(InputStream toEncode) { MD5Digest eTag = new MD5Digest(); byte[] resBuf = new byte[eTag.getDigestSize()]; byte[] buffer = new byte[1024]; ByteArrayOutputStream out = new ByteArrayOutputStream(); long length = 0; int numRead = -1; try { do { numRead = toEncode.read(buffer); if (numRead > 0) { length += numRead; eTag.update(buffer, 0, numRead); out.write(buffer, 0, numRead); } } while (numRead != -1); } catch (IOException e) { throw new RuntimeException(e); } finally { IOUtils.closeQuietly(out); IOUtils.closeQuietly(toEncode); } eTag.doFinal(resBuf, 0); return new MD5InputStreamResult(out.toByteArray(), resBuf, length); }
public static byte[] md5(byte[] plainBytes) { MD5Digest eTag = new MD5Digest(); byte[] resBuf = new byte[eTag.getDigestSize()]; eTag.update(plainBytes, 0, plainBytes.length); eTag.doFinal(resBuf, 0); return resBuf; }
public synchronized String generateSignature(byte[] message) throws Exception { // Log.trace("Signed message length is " + message.length); try { digest.reset(); cipher.init(true, privateRsaKey); digest.update(message, 0, message.length); byte[] hash = new byte[digest.getDigestSize()]; digest.doFinal(hash, 0); DigestInfo info = new DigestInfo(new AlgorithmIdentifier(md5, null), hash); byte[] bytes = info.getEncoded(ASN1Encoding.DER); byte[] signature = cipher.processBlock(bytes, 0, bytes.length); return new String(org.bouncycastle.util.encoders.Base64.encode(signature)); } catch (Exception e) { throw new Exception("Ошибка создания подписи:\n" + e.getMessage()); } }
/** * TODO: Kommentar * * @param file * @return */ public static byte[] checksum(File file) { MD5Digest md5 = new MD5Digest(); try { FileInputStream in = new FileInputStream(file); byte[] arr = new byte[65535]; int num; do { num = in.read(arr); if (num == -1) { break; } md5.update(arr, 0, num); } while (num == arr.length); byte[] ret = new byte[16]; md5.doFinal(ret, 0); return ret; } catch (Exception ex) { ExHandler.handle(ex); return null; } }
public synchronized void verifySignature(byte[] message, byte[] signature) throws Exception { try { digest.reset(); cipher.init(false, publicRsaKey); digest.update(message, 0, message.length); byte[] hash = new byte[digest.getDigestSize()]; digest.doFinal(hash, 0); DigestInfo info = new DigestInfo(new AlgorithmIdentifier(md5, null), hash); byte[] bytes = info.getEncoded(ASN1Encoding.DER); byte[] signatureData = org.bouncycastle.util.encoders.Base64.decode(signature); byte[] result = cipher.processBlock(signatureData, 0, signatureData.length); if ((result == null) || (result.length < hash.length)) { throw new Exception("Invalid signature (1)!"); } if (!compareFromTheEnd(hash, result)) { throw new Exception("Invalid signature (2)!"); } } catch (Exception e) { throw new Exception("Error checking signature:\n" + e.getMessage()); } }
public static byte[] md5(File toEncode) { MD5Digest eTag = new MD5Digest(); byte[] resBuf = new byte[eTag.getDigestSize()]; byte[] buffer = new byte[1024]; int numRead = -1; InputStream i = null; try { i = new FileInputStream(toEncode); do { numRead = i.read(buffer); if (numRead > 0) { eTag.update(buffer, 0, numRead); } } while (numRead != -1); } catch (IOException e) { throw new RuntimeException(e); } finally { IOUtils.closeQuietly(i); } eTag.doFinal(resBuf, 0); return resBuf; }