finished config streaming out/in

src/main/java/ch/ethz/seb/sebserver/gbl/async/AsyncService.java

@@ -8,14 +8,8 @@
 
 package ch.ethz.seb.sebserver.gbl.async;
 
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.PipedInputStream;
-import java.io.PipedOutputStream;
-import java.util.function.Consumer;
 import java.util.function.Supplier;
 
-import org.apache.commons.io.IOUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.context.annotation.Lazy;
@@ -72,41 +66,4 @@ public class AsyncService {
                 momoized);
     }
 
-    public void pipeToOutputStream(
-            final OutputStream output,
-            final Consumer<PipedOutputStream> consumer) {
-
-        this.asyncRunner.runAsync(() -> {
-
-            PipedOutputStream pout = null;
-            PipedInputStream pin = null;
-            try {
-                pout = new PipedOutputStream();
-                pin = new PipedInputStream(pout);
-
-                consumer.accept(pout);
-
-                IOUtils.copyLarge(pin, output);
-
-                pin.close();
-                pout.flush();
-                pout.close();
-
-            } catch (final IOException e) {
-                log.error("Error while pipe stream data: ", e);
-            } finally {
-                try {
-                    pin.close();
-                } catch (final IOException e1) {
-                    log.error("Failed to close PipedInputStream: ", e1);
-                }
-                try {
-                    pout.close();
-                } catch (final IOException e1) {
-                    log.error("Failed to close PipedOutputStream: ", e1);
-                }
-            }
-        });
-    }
-
 }

src/main/java/ch/ethz/seb/sebserver/gbl/util/Result.java

@@ -181,6 +181,12 @@ public final class Result<T> {
         }
     }
 
+    public void ifPresent(final Consumer<T> consumer) {
+        if (this.value != null) {
+            consumer.accept(this.value);
+        }
+    }
+
     /** Use this to map a given Result of type T to another Result of type U
      * within a given mapping function.
      *

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/SebConfigCryptor.java

@@ -10,10 +10,8 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig;
 
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.nio.ByteBuffer;
 import java.util.Set;
 
-import ch.ethz.seb.sebserver.gbl.util.Result;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService.Strategy;
 
 /** Interface for a SEB Configuration encryption and decryption strategy.
@@ -27,32 +25,14 @@ public interface SebConfigCryptor {
      * @return Set of strategies a concrete implementation is supporting */
     Set<Strategy> strategies();
 
-    /** Encrypt a given SEB configuration plain text representation within the given SebConfigEncryptionContext
-     *
-     * @param plainTextConfig SEB configuration plain text representation
-     * @param context SebConfigEncryptionContext containing additional data if needed
-     * @return Result of encrypted data within a ByteBuffer or reference to an Exception on error case */
-    Result<ByteBuffer> encrypt(
-            final CharSequence plainTextConfig,
-            final SebConfigEncryptionContext context);
-
-    /** Decrypt a given encrypted SEB configuration that has been encrypted by one of the supported strategies.
-     *
-     * @param cipher the encrypted SEB configuration cipher(text) within a ByteBuffer
-     * @param context SebConfigEncryptionContext containing additional data if needed
-     * @return Result of decrypted SEB configuration within a ByteBuffer or reference to an Exception on error case. */
-    Result<ByteBuffer> decrypt(
-            final ByteBuffer cipher,
-            final SebConfigEncryptionContext context);
-
     void encrypt(
-            final OutputStream encryptedOutput,
+            final OutputStream output,
-            final InputStream plainTextInputStream,
+            final InputStream input,
             final SebConfigEncryptionContext context);
 
     void decrypt(
-            final OutputStream plainTextOutput,
+            final OutputStream output,
-            final InputStream cipherInputStream,
+            final InputStream input,
             final SebConfigEncryptionContext context);
 
 }

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/SebConfigEncryptionContext.java

@@ -29,8 +29,9 @@ public interface SebConfigEncryptionContext {
 
     /** Get a defined Certificate if supported.
      *
+     * @param key The key of the Certificate to get
      * @return a defined Certificate
      * @throws UnsupportedOperationException if not supported */
-    Certificate getCertificate();
+    Certificate getCertificate(CharSequence key);
 
 }

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/SebConfigEncryptionService.java

@@ -10,12 +10,10 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig;
 
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.nio.ByteBuffer;
 import java.security.cert.Certificate;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-import ch.ethz.seb.sebserver.gbl.util.Result;
 import ch.ethz.seb.sebserver.gbl.util.Utils;
 
 public interface SebConfigEncryptionService {
@@ -60,21 +58,18 @@ public interface SebConfigEncryptionService {
      * @param plainTextConfig plainTextConfig plain text SEB Configuration as CharSequence
      * @return Result of plain text SEB Configuration within a ByteBuffer or a reference to an Exception on error
      *         case */
-    Result<ByteBuffer> plainText(CharSequence plainTextConfig);
+//    void streamPlainData(
+//            final OutputStream output,
+//            final InputStream input);
 
-    void streamEncryption(
+    void streamEncrypted(
             final OutputStream output,
             final InputStream input,
-            final Strategy strategy,
+            SebConfigEncryptionContext context);
-            final CharSequence password);
 
-    Result<ByteBuffer> encryptWithCertificate(
+    void streamDecrypted(
-            CharSequence plainTextConfig,
+            final OutputStream output,
-            Strategy strategy,
+            final InputStream input,
-            Certificate certificate);
-
-    Result<ByteBuffer> decrypt(
-            ByteBuffer cipher,
             Supplier<CharSequence> passwordSupplier,
             Function<CharSequence, Certificate> certificateStore);
 

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/ZipService.java

@@ -16,4 +16,5 @@ public interface ZipService {
     void write(OutputStream out, InputStream in);
 
     void read(OutputStream out, InputStream in);
+
 }

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/NoneEncryptor.java

@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Set;
+
+import org.apache.commons.io.IOUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
+
+import ch.ethz.seb.sebserver.gbl.async.AsyncServiceSpringConfig;
+import ch.ethz.seb.sebserver.gbl.profile.WebServiceProfile;
+import ch.ethz.seb.sebserver.gbl.util.Utils;
+import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigCryptor;
+import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionContext;
+import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService.Strategy;
+
+@Lazy
+@Component
+@WebServiceProfile
+public class NoneEncryptor implements SebConfigCryptor {
+
+    private static final Logger log = LoggerFactory.getLogger(NoneEncryptor.class);
+
+    private static final Set<Strategy> STRATEGIES = Utils.immutableSetOf(
+            Strategy.PLAIN_TEXT);
+
+    @Override
+    public Set<Strategy> strategies() {
+        return STRATEGIES;
+    }
+
+    @Override
+    @Async(AsyncServiceSpringConfig.EXECUTOR_BEAN_NAME)
+    public void encrypt(
+            final OutputStream output,
+            final InputStream input,
+            final SebConfigEncryptionContext context) {
+
+        if (log.isDebugEnabled()) {
+            log.debug("No encryption, write plain input data");
+        }
+
+        try {
+
+            IOUtils.copyLarge(input, output);
+
+            input.close();
+            output.flush();
+            output.close();
+
+        } catch (final IOException e) {
+            log.error("Error while streaming plain data to output: ", e);
+        } finally {
+            try {
+                input.close();
+            } catch (final IOException e) {
+                log.error("Failed to close InputStream");
+            }
+
+            if (log.isDebugEnabled()) {
+                log.debug("Finished with no encryption. Close input stream");
+            }
+        }
+    }
+
+    @Override
+    @Async(AsyncServiceSpringConfig.EXECUTOR_BEAN_NAME)
+    public void decrypt(
+            final OutputStream output,
+            final InputStream input,
+            final SebConfigEncryptionContext context) {
+
+        if (log.isDebugEnabled()) {
+            log.debug("No decryption, read plain input data");
+        }
+
+        try {
+
+            IOUtils.copyLarge(input, output);
+
+            input.close();
+            output.flush();
+            output.close();
+
+        } catch (final IOException e) {
+            log.error("Error while streaming plain data to output: ", e);
+        } finally {
+            try {
+                input.close();
+            } catch (final IOException e) {
+                log.error("Failed to close InputStream");
+            }
+
+            if (log.isDebugEnabled()) {
+                log.debug("Finished with no encryption. Close input stream");
+            }
+        }
+
+    }
+
+}

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/PasswordEncryptor.java

@@ -11,13 +11,12 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.nio.ByteBuffer;
 import java.util.Set;
 
 import org.apache.tomcat.util.http.fileupload.IOUtils;
+import org.cryptonode.jncryptor.AES256JNCryptorInputStream;
 import org.cryptonode.jncryptor.AES256JNCryptorOutputStream;
 import org.cryptonode.jncryptor.CryptorException;
-import org.cryptonode.jncryptor.JNCryptor;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.context.annotation.Lazy;
@@ -26,7 +25,6 @@ import org.springframework.stereotype.Component;
 
 import ch.ethz.seb.sebserver.gbl.async.AsyncServiceSpringConfig;
 import ch.ethz.seb.sebserver.gbl.profile.WebServiceProfile;
-import ch.ethz.seb.sebserver.gbl.util.Result;
 import ch.ethz.seb.sebserver.gbl.util.Utils;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigCryptor;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionContext;
@@ -43,35 +41,11 @@ public class PasswordEncryptor implements SebConfigCryptor {
             Strategy.PASSWORD_PSWD,
             Strategy.PASSWORD_PWCC);
 
-    private final JNCryptor jnCryptor;
-
-    protected PasswordEncryptor(final JNCryptor jnCryptor) {
-        this.jnCryptor = jnCryptor;
-    }
-
     @Override
     public Set<Strategy> strategies() {
         return STRATEGIES;
     }
 
-    @Override
-    public Result<ByteBuffer> encrypt(final CharSequence plainTextConfig, final SebConfigEncryptionContext context) {
-        return Result.tryCatch(() -> {
-            return ByteBuffer.wrap(this.jnCryptor.encryptData(
-                    Utils.toByteArray(plainTextConfig),
-                    Utils.toCharArray(context.getPassword())));
-        });
-    }
-
-    @Override
-    public Result<ByteBuffer> decrypt(final ByteBuffer cipher, final SebConfigEncryptionContext context) {
-        return Result.tryCatch(() -> {
-            return ByteBuffer.wrap(this.jnCryptor.decryptData(
-                    Utils.toByteArray(cipher),
-                    Utils.toCharArray(context.getPassword())));
-        });
-    }
-
     @Override
     @Async(AsyncServiceSpringConfig.EXECUTOR_BEAN_NAME)
     public void encrypt(
@@ -80,7 +54,7 @@ public class PasswordEncryptor implements SebConfigCryptor {
             final SebConfigEncryptionContext context) {
 
         if (log.isDebugEnabled()) {
-            log.debug("*** Start streaming asynchronous encryption of SEB exam configuration data");
+            log.debug("*** Start streaming asynchronous encryption");
         }
 
         AES256JNCryptorOutputStream encryptOutput = null;
@@ -88,17 +62,17 @@ public class PasswordEncryptor implements SebConfigCryptor {
 
             encryptOutput = new AES256JNCryptorOutputStream(
                     output,
-                    Utils.toCharArray(context.getPassword()));
+                    Utils.toCharArray(context.getPassword()),
+                    10000);
 
             IOUtils.copyLarge(input, encryptOutput);
 
-            encryptOutput.close();
+            input.close();
             encryptOutput.flush();
             encryptOutput.close();
-            output.flush();
 
         } catch (final CryptorException e) {
-            log.error("Error while trying to stream and encrypt seb exam configuration data: ", e);
+            log.error("Error while trying to stream and encrypt data: ", e);
         } catch (final IOException e) {
             log.error("Error while trying to read/write form/to streams: ", e);
         } finally {
@@ -110,7 +84,7 @@ public class PasswordEncryptor implements SebConfigCryptor {
             }
 
             if (log.isDebugEnabled()) {
-                log.debug("*** Finish streaming asynchronous encryption of SEB exam configuration data");
+                log.debug("*** Finish streaming asynchronous encryption");
             }
         }
     }
@@ -118,11 +92,42 @@ public class PasswordEncryptor implements SebConfigCryptor {
     @Override
     @Async(AsyncServiceSpringConfig.EXECUTOR_BEAN_NAME)
     public void decrypt(
-            final OutputStream plainTextOutput,
+            final OutputStream output,
-            final InputStream cipherInputStream,
+            final InputStream input,
             final SebConfigEncryptionContext context) {
 
-        // TODO Auto-generated method stub
+        if (log.isDebugEnabled()) {
+            log.debug("*** Start streaming asynchronous decryption");
+        }
+
+        AES256JNCryptorInputStream encryptInput = null;
+        try {
+
+            encryptInput = new AES256JNCryptorInputStream(
+                    input,
+                    Utils.toCharArray(context.getPassword()));
+
+            IOUtils.copyLarge(encryptInput, output);
+
+            input.close();
+            encryptInput.close();
+            output.flush();
+            output.close();
+
+        } catch (final IOException e) {
+            log.error("Error while trying to read/write form/to streams: ", e);
+        } finally {
+            try {
+                if (encryptInput != null)
+                    encryptInput.close();
+            } catch (final IOException e) {
+                log.error("Failed to close AES256JNCryptorOutputStream: ", e);
+            }
+
+            if (log.isDebugEnabled()) {
+                log.debug("*** Finish streaming asynchronous decryption");
+            }
+        }
 
     }
 

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/SebClientConfigServiceImpl.java

@@ -8,13 +8,11 @@
 
 package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl;
 
-import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
-import java.nio.ByteBuffer;
 import java.util.Collection;
 import java.util.UUID;
 
@@ -31,7 +29,6 @@ import ch.ethz.seb.sebserver.gbl.model.institution.Institution;
 import ch.ethz.seb.sebserver.gbl.model.sebconfig.SebClientConfig;
 import ch.ethz.seb.sebserver.gbl.profile.WebServiceProfile;
 import ch.ethz.seb.sebserver.gbl.util.Result;
-import ch.ethz.seb.sebserver.gbl.util.Utils;
 import ch.ethz.seb.sebserver.webservice.servicelayer.client.ClientCredentialService;
 import ch.ethz.seb.sebserver.webservice.servicelayer.client.ClientCredentials;
 import ch.ethz.seb.sebserver.webservice.servicelayer.dao.InstitutionDAO;
@@ -40,6 +37,7 @@ import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebClientConfigSe
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService.Strategy;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.ZipService;
+import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl.SebConfigEncryptionServiceImpl.EncryptionContext;
 
 @Lazy
 @Service
@@ -147,6 +145,7 @@ public class SebClientConfigServiceImpl implements SebClientConfigService {
         PipedOutputStream pOut = null;
         PipedInputStream pIn = null;
         try {
+
             // zip the plain text
             final InputStream plainIn = IOUtils.toInputStream(plainTextConfig, "UTF-8");
             pOut = new PipedOutputStream();
@@ -157,7 +156,10 @@ public class SebClientConfigServiceImpl implements SebClientConfigService {
             if (encryptionPassword != null) {
                 passwordEncryption(output, encryptionPassword, pIn);
             } else {
-                noEncryption(output, plainTextConfig);
+                this.sebConfigEncryptionService.streamEncrypted(
+                        output,
+                        pIn,
+                        EncryptionContext.contextOfPlainText());
             }
 
         } catch (final Exception e) {
@@ -177,21 +179,6 @@ public class SebClientConfigServiceImpl implements SebClientConfigService {
         }
     }
 
-    private void noEncryption(
-            final OutputStream output,
-            final String plainTextConfig) throws IOException {
-
-        log.debug("Serve plain text seb configuration with specified header");
-
-        final ByteBuffer encryptedConfig = this.sebConfigEncryptionService.plainText(plainTextConfig)
-                .getOrThrow();
-
-        IOUtils.copyLarge(
-                new ByteArrayInputStream(Utils.toByteArray(encryptedConfig)),
-                output);
-
-    }
-
     private void passwordEncryption(
             final OutputStream output,
             final CharSequence encryptionPassword,
@@ -204,11 +191,12 @@ public class SebClientConfigServiceImpl implements SebClientConfigService {
         final CharSequence encryptionPasswordPlaintext = this.clientCredentialService
                 .decrypt(encryptionPassword);
 
-        this.sebConfigEncryptionService.streamEncryption(
+        this.sebConfigEncryptionService.streamEncrypted(
                 output,
                 input,
-                Strategy.PASSWORD_PSWD,
+                EncryptionContext.contextOf(
-                encryptionPasswordPlaintext);
+                        Strategy.PASSWORD_PSWD,
+                        encryptionPasswordPlaintext));
 
         if (log.isDebugEnabled()) {
             log.debug("*** Finished Seb client configuration with password based encryption");

src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/SebConfigEncryptionServiceImpl.java

@@ -13,7 +13,6 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
-import java.nio.ByteBuffer;
 import java.security.cert.Certificate;
 import java.util.Arrays;
 import java.util.Collection;
@@ -31,7 +30,6 @@ import org.springframework.stereotype.Service;
 
 import ch.ethz.seb.sebserver.gbl.profile.WebServiceProfile;
 import ch.ethz.seb.sebserver.gbl.util.Result;
-import ch.ethz.seb.sebserver.gbl.util.Utils;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigCryptor;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionContext;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService;
@@ -57,27 +55,24 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
 
     }
 
-    @Override
+//    @Override
-    public Result<ByteBuffer> plainText(final CharSequence plainTextConfig) {
+//    public void streamPlainData(
-
+//            final OutputStream output,
-        if (log.isDebugEnabled()) {
+//            final InputStream input) {
-            log.debug("No encryption, use plain text with header");
+//
-        }
+//
-
+//        getEncryptor(strategy)
-        return Result.tryCatch(() -> {
+//        .getOrThrow()
-            return addHeader(
+//        .encrypt(pout, input, context);
-                    Utils.toByteBuffer(plainTextConfig),
+//    }
-                    Strategy.PLAIN_TEXT);
-        });
-    }
 
     @Override
-    public void streamEncryption(
+    public void streamEncrypted(
             final OutputStream output,
             final InputStream input,
-            final Strategy strategy,
+            final SebConfigEncryptionContext context) {
-            final CharSequence password) {
 
+        final Strategy strategy = context.getStrategy();
         PipedOutputStream pout = null;
         PipedInputStream pin = null;
         try {
@@ -91,26 +86,27 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
             pout.write(strategy.header);
             getEncryptor(strategy)
                     .getOrThrow()
-                    .encrypt(pout,
+                    .encrypt(pout, input, context);
-                            input,
-                            EncryptionContext.contextOf(strategy, password));
 
             IOUtils.copyLarge(pin, output);
 
             pin.close();
             pout.flush();
             pout.close();
+            output.flush();
 
         } catch (final IOException e) {
             log.error("Error while stream encrypted data: ", e);
         } finally {
             try {
-                pin.close();
+                if (pin != null)
+                    pin.close();
             } catch (final IOException e1) {
                 log.error("Failed to close PipedInputStream: ", e1);
             }
             try {
-                pout.close();
+                if (pout != null)
+                    pout.close();
             } catch (final IOException e1) {
                 log.error("Failed to close PipedOutputStream: ", e1);
             }
@@ -118,95 +114,72 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
     }
 
     @Override
-    public Result<ByteBuffer> encryptWithCertificate(
+    public void streamDecrypted(
-            final CharSequence plainTextConfig,
+            final OutputStream output,
-            final Strategy strategy,
+            final InputStream input,
-            final Certificate certificate) {
-
-        if (log.isDebugEnabled()) {
-            log.debug("Certificate encryption with strategy: {}", strategy);
-        }
-
-        return getEncryptor(strategy)
-                .flatMap(encryptor -> encryptor.encrypt(
-                        plainTextConfig,
-                        EncryptionContext.contextOf(strategy, certificate)))
-                .map(bb -> addHeader(bb, strategy));
-    }
-
-    @Override
-    public Result<ByteBuffer> decrypt(
-            final ByteBuffer cipher,
             final Supplier<CharSequence> passwordSupplier,
             final Function<CharSequence, Certificate> certificateStore) {
 
-        return verifyStrategy(cipher)
+        PipedOutputStream pout = null;
-                .flatMap(strategy -> decrypt(strategy, cipher, passwordSupplier, certificateStore));
+        PipedInputStream pin = null;
-    }
+        try {
+            pout = new PipedOutputStream();
+            pin = new PipedInputStream(pout);
 
-    private Result<ByteBuffer> decrypt(
+            final Strategy strategy = verifyStrategy(input);
-            final Strategy strategy,
-            final ByteBuffer cipher,
-            final Supplier<CharSequence> passwordSupplier,
-            final Function<CharSequence, Certificate> certificateStore) {
 
-        if (log.isDebugEnabled()) {
+            if (log.isDebugEnabled()) {
-            log.debug("Decryption with strategy: {}", strategy);
+                log.debug("Password decryption with strategy: {}", strategy);
-        }
+            }
 
-        if (strategy == Strategy.PLAIN_TEXT) {
+            final EncryptionContext context = new EncryptionContext(
-            return Result.of(removeHeader(cipher, strategy));
+                    strategy,
-        }
+                    (passwordSupplier != null) ? passwordSupplier.get() : null,
+                    certificateStore);
 
-        return getEncryptor(strategy)
+            getEncryptor(strategy)
-                .flatMap(encryptor -> encryptor.decrypt(
+                    .getOrThrow()
-                        removeHeader(cipher, strategy),
+                    .decrypt(pout, input, context);
-                        (strategy.type == Type.PASSWORD)
-                                ? EncryptionContext.contextOf(strategy, passwordSupplier.get())
-                                : EncryptionContext.contextOf(strategy, certificateStore)));
-    }
 
-    private ByteBuffer addHeader(final ByteBuffer input, final Strategy strategy) {
+            IOUtils.copyLarge(pin, output);
-        final ByteBuffer _input = (input == null) ? ByteBuffer.allocate(0) : input;
 
-        _input.rewind();
+            pin.close();
-        final ByteBuffer buffer = ByteBuffer.allocate(
+            pout.flush();
-                SebConfigEncryptionServiceImpl.HEADER_SIZE +
+            pout.close();
-                        _input.limit());
+            output.flush();
 
-        buffer.put(strategy.header);
+        } catch (final IOException e) {
-        buffer.put(_input);
+            log.error("Error while stream decrypted data: ", e);
-        return buffer.asReadOnlyBuffer();
+        } finally {
-    }
+            try {
-
+                if (pin != null)
-    private ByteBuffer removeHeader(final ByteBuffer input, final Strategy strategy) {
+                    pin.close();
-        input.rewind();
+            } catch (final IOException e1) {
-        final byte[] header = new byte[SebConfigEncryptionServiceImpl.HEADER_SIZE];
+                log.error("Failed to close PipedInputStream: ", e1);
-        input.get(header);
+            }
-
+            try {
-        if (Arrays.equals(strategy.header, header)) {
+                if (pout != null)
-            final byte[] b = new byte[input.remaining()];
+                    pout.close();
-            input.get(b);
+            } catch (final IOException e1) {
-            return ByteBuffer.wrap(b).asReadOnlyBuffer();
+                log.error("Failed to close PipedOutputStream: ", e1);
-        } else {
-            input.clear();
-            return input.asReadOnlyBuffer();
-        }
-    }
-
-    private Result<Strategy> verifyStrategy(final ByteBuffer cipher) {
-        cipher.rewind();
-        final byte[] header = new byte[HEADER_SIZE];
-        cipher.get(header);
-        //final String headerString = Utils.toString(header);
-        for (final Strategy s : Strategy.values()) {
-            if (Arrays.equals(s.header, header)) {
-                return Result.of(s);
             }
         }
+    }
 
-        log.error("Failed to verify encryption strategy. Fallback to plain text strategy");
+    private Strategy verifyStrategy(final InputStream input) {
-        return Result.of(Strategy.PLAIN_TEXT);
+        try {
+            final byte[] header = new byte[HEADER_SIZE];
+            input.read(header);
+            for (final Strategy s : Strategy.values()) {
+                if (Arrays.equals(s.header, header)) {
+                    return s;
+                }
+            }
+            throw new IllegalStateException("Failed to verify decryption strategy from input stream");
+        } catch (final IOException e) {
+            log.error("Failed to read decryption strategy from input stream");
+            throw new IllegalStateException("Failed to verify decryption strategy from input stream");
+        }
     }
 
     private Result<SebConfigCryptor> getEncryptor(final Strategy strategy) {
@@ -218,21 +191,20 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
         return Result.of(encryptor);
     }
 
-    protected static class EncryptionContext implements SebConfigEncryptionContext {
+    static class EncryptionContext implements SebConfigEncryptionContext {
 
         public final Strategy strategy;
         public final CharSequence password;
-        public final Certificate certificate;
+        public final Function<CharSequence, Certificate> certificateStore;
 
         private EncryptionContext(
                 final Strategy strategy,
                 final CharSequence password,
-                final Certificate certificate,
                 final Function<CharSequence, Certificate> certificateStore) {
 
             this.strategy = strategy;
             this.password = password;
-            this.certificate = certificate;
+            this.certificateStore = certificateStore;
         }
 
         @Override
@@ -246,18 +218,16 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
         }
 
         @Override
-        public Certificate getCertificate() {
+        public Certificate getCertificate(final CharSequence key) {
-            return this.certificate;
+            if (this.certificateStore == null) {
+                throw new UnsupportedOperationException();
+            }
+            return this.certificateStore.apply(key);
         }
 
         static SebConfigEncryptionContext contextOf(final Strategy strategy, final CharSequence password) {
             checkPasswordbased(strategy);
-            return new EncryptionContext(strategy, password, null, null);
+            return new EncryptionContext(strategy, password, null);
-        }
-
-        static SebConfigEncryptionContext contextOf(final Strategy strategy, final Certificate certificate) {
-            checkCertificateBased(strategy);
-            return new EncryptionContext(strategy, null, certificate, null);
         }
 
         static SebConfigEncryptionContext contextOf(
@@ -265,7 +235,7 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
                 final Function<CharSequence, Certificate> certificateStore) {
 
             checkCertificateBased(strategy);
-            return new EncryptionContext(strategy, null, null, certificateStore);
+            return new EncryptionContext(strategy, null, certificateStore);
         }
 
         static void checkPasswordbased(final Strategy strategy) {
@@ -280,6 +250,10 @@ public final class SebConfigEncryptionServiceImpl implements SebConfigEncryption
             }
         }
 
+        public static SebConfigEncryptionContext contextOfPlainText() {
+            return new EncryptionContext(Strategy.PLAIN_TEXT, null, null);
+        }
+
     }
 
 }

src/test/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/PasswordEncryptorTest.java

@@ -10,10 +10,10 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl;
 
 import static org.junit.Assert.*;
 
+import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
-import java.nio.ByteBuffer;
 import java.util.Arrays;
 
 import org.apache.commons.io.IOUtils;
@@ -22,7 +22,6 @@ import org.cryptonode.jncryptor.AES256JNCryptorOutputStream;
 import org.cryptonode.jncryptor.JNCryptor;
 import org.junit.Test;
 
-import ch.ethz.seb.sebserver.gbl.util.Result;
 import ch.ethz.seb.sebserver.gbl.util.Utils;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionContext;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService.Strategy;
@@ -45,7 +44,7 @@ public class PasswordEncryptorTest {
     public void testUsingPassword() throws Exception {
 
         final String config = "<TestConfig></TestConfig>";
-        final byte[] plaintext = Utils.toByteArray(config);//getRandomBytes(127);
+        final byte[] plaintext = Utils.toByteArray(config);
 
         final String password = "Testing1234";
 
@@ -63,36 +62,9 @@ public class PasswordEncryptorTest {
         assertArrayEquals(plaintext, result);
     }
 
-    @Test
-    public void test1() {
-        final JNCryptor jnCryptor = new AES256JNCryptor();
-        jnCryptor.setPBKDFIterations(10000);
-        final PasswordEncryptor encryptor = new PasswordEncryptor(jnCryptor);
-
-        final String config = "<TestConfig></TestConfig>";
-        final String pwd = "password";
-
-        final SebConfigEncryptionContext context = EncryptionContext.contextOf(
-                Strategy.PASSWORD_PWCC,
-                pwd);
-
-        final Result<ByteBuffer> encrypt = encryptor.encrypt(config, context);
-        assertFalse(encrypt.hasError());
-        final ByteBuffer cipher = encrypt.getOrThrow();
-        final byte[] byteArray = Utils.toByteArray(cipher);
-
-        final Result<ByteBuffer> decrypt = encryptor.decrypt(cipher, context);
-        assertFalse(decrypt.hasError());
-
-        final String decryptedConfig = Utils.toString(decrypt.getOrThrow());
-        assertEquals(config, decryptedConfig);
-    }
-
     @Test
     public void test2() throws IOException {
-        final JNCryptor jnCryptor = new AES256JNCryptor();
+        final PasswordEncryptor encryptor = new PasswordEncryptor();
-        jnCryptor.setPBKDFIterations(10000);
-        final PasswordEncryptor encryptor = new PasswordEncryptor(jnCryptor);
 
         final String config = "<TestConfig></TestConfig>";
         final String pwd = "password";
@@ -109,14 +81,16 @@ public class PasswordEncryptorTest {
 
         final byte[] byteArray = out.toByteArray();
 
-        final Result<ByteBuffer> decrypt = encryptor.decrypt(
+        final ByteArrayOutputStream out2 = new ByteArrayOutputStream(512);
-                ByteBuffer.wrap(byteArray),
+        encryptor.decrypt(
+                out2,
+                new ByteArrayInputStream(byteArray),
                 context);
-        assertFalse(decrypt.hasError());
 
-        final ByteBuffer buffer = decrypt.getOrThrow();
+        final byte[] byteArray2 = out2.toByteArray();
-        buffer.rewind();
+        assertNotNull(byteArray2);
-        final String decryptedConfig = Utils.toString(buffer);
+
+        final String decryptedConfig = new String(byteArray2, "UTF-8");
         assertEquals(config, decryptedConfig);
     }
 

src/test/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/SebConfigEncryptionServiceImplTest.java

@@ -10,6 +10,7 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl;
 
 import static org.junit.Assert.*;
 
+import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.nio.ByteBuffer;
@@ -17,31 +18,44 @@ import java.util.Arrays;
 import java.util.List;
 
 import org.apache.commons.io.IOUtils;
-import org.cryptonode.jncryptor.AES256JNCryptor;
-import org.cryptonode.jncryptor.JNCryptor;
 import org.junit.Test;
 
-import ch.ethz.seb.sebserver.gbl.util.Result;
 import ch.ethz.seb.sebserver.gbl.util.Utils;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigCryptor;
 import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.SebConfigEncryptionService.Strategy;
+import ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl.SebConfigEncryptionServiceImpl.EncryptionContext;
 
 public class SebConfigEncryptionServiceImplTest {
 
     @Test
-    public void testPlainText() {
+    public void testPlainText() throws IOException {
         final SebConfigEncryptionServiceImpl sebConfigEncryptionServiceImpl = sebConfigEncryptionServiceImpl();
 
         final String config = "<TestConfig></TestConfig>";
 
-        final Result<ByteBuffer> plainText = sebConfigEncryptionServiceImpl.plainText(config);
+        final ByteArrayOutputStream out = new ByteArrayOutputStream();
-        assertFalse(plainText.hasError());
+        sebConfigEncryptionServiceImpl
-        final ByteBuffer cipher = plainText.get();
+                .streamEncrypted(
-        assertEquals("plnd<TestConfig></TestConfig>", Utils.toString(cipher));
+                        out,
+                        IOUtils.toInputStream(config, "UTF-8"),
+                        EncryptionContext.contextOfPlainText());
 
-        final Result<ByteBuffer> decrypt = sebConfigEncryptionServiceImpl.decrypt(cipher, null, null);
+        final byte[] plainWithHeader = out.toByteArray();
-        assertFalse(decrypt.hasError());
+        assertNotNull(plainWithHeader);
-        assertEquals("<TestConfig></TestConfig>", Utils.toString(decrypt.get()));
+        assertEquals("plnd<TestConfig></TestConfig>", Utils.toString(plainWithHeader));
+
+        final ByteArrayOutputStream out2 = new ByteArrayOutputStream(512);
+        sebConfigEncryptionServiceImpl.streamDecrypted(
+                out2,
+                new ByteArrayInputStream(plainWithHeader),
+                null,
+                null);
+
+        final byte[] byteArray2 = out2.toByteArray();
+        assertNotNull(byteArray2);
+
+        final String decryptedConfig = new String(byteArray2, "UTF-8");
+        assertEquals(config, decryptedConfig);
     }
 
     @Test
@@ -53,11 +67,12 @@ public class SebConfigEncryptionServiceImplTest {
 
         final ByteArrayOutputStream out = new ByteArrayOutputStream(1024);
 
-        sebConfigEncryptionServiceImpl.streamEncryption(
+        sebConfigEncryptionServiceImpl.streamEncrypted(
                 out,
                 IOUtils.toInputStream(config, "UTF-8"),
-                Strategy.PASSWORD_PWCC,
+                EncryptionContext.contextOf(
-                pwd);
+                        Strategy.PASSWORD_PWCC,
+                        pwd));
 
         final byte[] byteArray = out.toByteArray();
 
@@ -65,17 +80,24 @@ public class SebConfigEncryptionServiceImplTest {
         final ByteBuffer cipher = ByteBuffer.wrap(byteArray);
         assertTrue(Utils.toString(cipher).startsWith(Utils.toString(Strategy.PASSWORD_PWCC.header)));
 
-        final Result<ByteBuffer> decrypt = sebConfigEncryptionServiceImpl.decrypt(cipher, () -> pwd, null);
+        final ByteArrayOutputStream out2 = new ByteArrayOutputStream(512);
-        assertFalse(decrypt.hasError());
+        sebConfigEncryptionServiceImpl.streamDecrypted(
-        assertEquals("<TestConfig></TestConfig>", Utils.toString(decrypt.get()));
+                out2,
+                new ByteArrayInputStream(byteArray),
+                () -> pwd,
+                null);
+
+        final byte[] byteArray2 = out2.toByteArray();
+        assertNotNull(byteArray2);
+
+        final String decryptedConfig = new String(byteArray2, "UTF-8");
+        assertEquals(config, decryptedConfig);
     }
 
     private SebConfigEncryptionServiceImpl sebConfigEncryptionServiceImpl() {
-        final JNCryptor jnCryptor = new AES256JNCryptor();
-        jnCryptor.setPBKDFIterations(10000);
-
         final List<SebConfigCryptor> encryptors = Arrays.asList(
-                new PasswordEncryptor(jnCryptor));
+                new PasswordEncryptor(),
+                new NoneEncryptor());
         return new SebConfigEncryptionServiceImpl(encryptors);
     }