Add symmetric decryption and add license headers

src/main/java/de/vanitasvitae/crypto/pgpainless/KeyFilter.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import java.util.HashSet;

src/main/java/de/vanitasvitae/crypto/pgpainless/PGPainless.java

@@ -1,12 +1,31 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 
+import de.vanitasvitae.crypto.pgpainless.algorithm.CompressionAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.algorithm.SymmetricKeyAlgorithm;
 import de.vanitasvitae.crypto.pgpainless.decryption_verification.DecryptionBuilder;
 import de.vanitasvitae.crypto.pgpainless.encryption_signing.EncryptionBuilder;
 import de.vanitasvitae.crypto.pgpainless.key.generation.KeyRingBuilder;
+import de.vanitasvitae.crypto.pgpainless.symmetric_encryption.SymmetricEncryptorDecryptor;
 import org.bouncycastle.bcpg.ArmoredInputStream;
+import org.bouncycastle.openpgp.PGPException;
 import org.bouncycastle.openpgp.PGPPublicKeyRing;
 import org.bouncycastle.openpgp.operator.bc.BcKeyFingerprintCalculator;
 
@@ -27,4 +46,33 @@ public class PGPainless {
     public static PGPPublicKeyRing publicKeyRingFromBytes(byte[] bytes) throws IOException {
         return new PGPPublicKeyRing(new ArmoredInputStream(new ByteArrayInputStream(bytes)), new BcKeyFingerprintCalculator());
     }
+
+    /**
+     * Encrypt some data symmetrically using OpenPGP and a password.
+     * The resulting data will be uncompressed and integrity protected.
+     *
+     * @param data input data.
+     * @param password password.
+     * @return symmetrically OpenPGP encrypted data.
+     * @throws IOException IO is dangerous.
+     * @throws PGPException PGP is brittle.
+     */
+    public static byte[] encryptWithPassword(byte[] data, char[] password, SymmetricKeyAlgorithm algorithm) throws IOException, PGPException {
+        return SymmetricEncryptorDecryptor.symmetricallyEncrypt(data, password,
+                algorithm, CompressionAlgorithm.UNCOMPRESSED);
+    }
+
+    /**
+     * Decrypt some symmetrically encrypted data using a password.
+     * The data is suspected to be integrity protected.
+     *
+     * @param data symmetrically OpenPGP encrypted data.
+     * @param password password.
+     * @return decrypted data.
+     * @throws IOException IO is dangerous.
+     * @throws PGPException PGP is brittle.
+     */
+    public static byte[] decryptWithPassword(byte[] data, char[] password) throws IOException, PGPException {
+        return SymmetricEncryptorDecryptor.symmetricallyDecrypt(data, password);
+    }
 }

src/main/java/de/vanitasvitae/crypto/pgpainless/PGPv4Fingerprint.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import java.util.Arrays;

src/main/java/de/vanitasvitae/crypto/pgpainless/PainlessStream.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/PublicKeyNotFoundException.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import org.bouncycastle.openpgp.PGPException;

src/main/java/de/vanitasvitae/crypto/pgpainless/SecretKeyNotFoundException.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 public class SecretKeyNotFoundException extends Exception {

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/AlgorithmSuite.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import java.util.ArrayList;

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/CompressionAlgorithm.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import java.util.HashMap;

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/Feature.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import java.util.HashMap;

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/HashAlgorithm.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import java.util.HashMap;

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/KeyFlag.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import org.bouncycastle.bcpg.sig.KeyFlags;

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/PublicKeyAlgorithm.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import java.util.HashMap;

src/main/java/de/vanitasvitae/crypto/pgpainless/algorithm/SymmetricKeyAlgorithm.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.algorithm;
 
 import java.util.HashMap;

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/DecryptionBuilder.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/DecryptionBuilderInterface.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/DecryptionStream.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/DecryptionStreamFactory.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/MissingPublicKeyCallback.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 public interface MissingPublicKeyCallback {

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/PainlessResult.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 import java.util.Collections;

src/main/java/de/vanitasvitae/crypto/pgpainless/decryption_verification/SignatureVerifyingInputStream.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.decryption_verification;
 
 import java.io.FilterInputStream;

src/main/java/de/vanitasvitae/crypto/pgpainless/encryption_signing/EncryptionBuilder.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.encryption_signing;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/encryption_signing/EncryptionBuilderInterface.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.encryption_signing;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/encryption_signing/EncryptionStream.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.encryption_signing;
 
 import java.io.IOException;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/SecretKeyRingProtector.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key;
 
 import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor;
@@ -5,8 +20,8 @@ import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
 
 public interface SecretKeyRingProtector {
 
-   PBESecretKeyDecryptor getDecryptor(Long keyId);
+    PBESecretKeyDecryptor getDecryptor(Long keyId);
 
-   PBESecretKeyEncryptor getEncryptor(Long keyId);
+    PBESecretKeyEncryptor getEncryptor(Long keyId);
 
 }

src/main/java/de/vanitasvitae/crypto/pgpainless/key/UnprotectedKeysProtector.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key;
 
 import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/KeyRingBuilder.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation;
 
 

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/KeyRingBuilderInterface.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation;
 
 import java.security.InvalidAlgorithmParameterException;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/KeySpec.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation;
 
 import de.vanitasvitae.crypto.pgpainless.key.generation.type.KeyType;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/KeySpecBuilder.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation;
 
 import de.vanitasvitae.crypto.pgpainless.algorithm.AlgorithmSuite;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/KeySpecBuilderInterface.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation;
 
 import de.vanitasvitae.crypto.pgpainless.algorithm.CompressionAlgorithm;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/ECDH.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import java.security.spec.AlgorithmParameterSpec;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/ECDSA.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import de.vanitasvitae.crypto.pgpainless.algorithm.PublicKeyAlgorithm;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/ElGamal_ENCRYPT.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import de.vanitasvitae.crypto.pgpainless.algorithm.PublicKeyAlgorithm;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/ElGamal_GENERAL.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import java.security.spec.AlgorithmParameterSpec;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/KeyType.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import java.security.spec.AlgorithmParameterSpec;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/RSA_ENCRYPT.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import de.vanitasvitae.crypto.pgpainless.algorithm.PublicKeyAlgorithm;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/RSA_GENERAL.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import java.security.spec.AlgorithmParameterSpec;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/RSA_SIGN.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type;
 
 import de.vanitasvitae.crypto.pgpainless.algorithm.PublicKeyAlgorithm;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/curve/EllipticCurve.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type.curve;
 
 public enum EllipticCurve {

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/length/DiffieHellmanLength.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type.length;
 
 public enum DiffieHellmanLength implements KeyLength {

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/length/ElGamalLength.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type.length;
 
 public enum ElGamalLength implements KeyLength {

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/length/KeyLength.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type.length;
 
 public interface KeyLength {

src/main/java/de/vanitasvitae/crypto/pgpainless/key/generation/type/length/RsaLength.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.generation.type.length;
 
 public enum RsaLength implements KeyLength {

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/KeySelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key;
 
 import java.util.Set;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/PublicKeySelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key;
 
 import java.util.HashSet;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/SecretKeySelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key;
 
 import java.util.HashSet;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/impl/And.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key.impl;
 
 import de.vanitasvitae.crypto.pgpainless.key.selection.key.PublicKeySelectionStrategy;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/impl/EncryptionKeySelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key.impl;
 
 import de.vanitasvitae.crypto.pgpainless.key.selection.key.PublicKeySelectionStrategy;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/impl/NoRevocation.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key.impl;
 
 import de.vanitasvitae.crypto.pgpainless.key.selection.key.PublicKeySelectionStrategy;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/key/impl/SignatureKeySelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.key.impl;
 
 import de.vanitasvitae.crypto.pgpainless.key.selection.key.SecretKeySelectionStrategy;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/KeyRingSelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring;
 
 import java.util.Set;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/PublicKeyRingSelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring;
 
 import java.util.HashSet;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/SecretKeyRingSelectionStrategy.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring;
 
 import java.util.HashSet;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/impl/Email.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring.impl;
 
 import org.bouncycastle.openpgp.PGPPublicKey;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/impl/ExactUserId.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring.impl;
 
 import java.util.Iterator;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/impl/PartialUserId.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring.impl;
 
 import java.util.Iterator;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/impl/Whitelist.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring.impl;
 
 import java.util.Map;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/impl/Wildcard.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring.impl;
 
 import de.vanitasvitae.crypto.pgpainless.key.selection.keyring.PublicKeyRingSelectionStrategy;

src/main/java/de/vanitasvitae/crypto/pgpainless/key/selection/keyring/impl/XMPP.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.key.selection.keyring.impl;
 
 import org.bouncycastle.openpgp.PGPPublicKeyRing;

src/main/java/de/vanitasvitae/crypto/pgpainless/symmetric_encryption/SymmetricEncryptorDecryptor.java

@@ -0,0 +1,149 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.vanitasvitae.crypto.pgpainless.symmetric_encryption;
+
+import java.io.BufferedInputStream;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.SecureRandom;
+import java.util.Date;
+
+import de.vanitasvitae.crypto.pgpainless.algorithm.CompressionAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.algorithm.SymmetricKeyAlgorithm;
+import org.bouncycastle.openpgp.PGPCompressedData;
+import org.bouncycastle.openpgp.PGPCompressedDataGenerator;
+import org.bouncycastle.openpgp.PGPEncryptedDataGenerator;
+import org.bouncycastle.openpgp.PGPEncryptedDataList;
+import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.PGPLiteralData;
+import org.bouncycastle.openpgp.PGPLiteralDataGenerator;
+import org.bouncycastle.openpgp.PGPPBEEncryptedData;
+import org.bouncycastle.openpgp.PGPUtil;
+import org.bouncycastle.openpgp.bc.BcPGPObjectFactory;
+import org.bouncycastle.openpgp.operator.bc.BcPBEDataDecryptorFactory;
+import org.bouncycastle.openpgp.operator.bc.BcPGPDigestCalculatorProvider;
+import org.bouncycastle.openpgp.operator.jcajce.JcePBEKeyEncryptionMethodGenerator;
+import org.bouncycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder;
+import org.bouncycastle.util.io.Streams;
+
+/**
+ * Stolen from <a href="https://github.com/bcgit/bc-java/blob/master/pg/src/main/java/org/bouncycastle/openpgp/examples/PBEFileProcessor.java">
+ *     Bouncycastle examples</a>.
+ */
+public class SymmetricEncryptorDecryptor {
+
+    public static byte[] symmetricallyEncrypt(byte[] data,
+                                              char[] password,
+                                              SymmetricKeyAlgorithm algorithm,
+                                              CompressionAlgorithm compressionAlgorithm)
+            throws IOException, PGPException {
+
+        byte[] compressedData = compress(data, compressionAlgorithm.getAlgorithmId());
+
+        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
+
+        PGPEncryptedDataGenerator encGen = new PGPEncryptedDataGenerator(
+                new JcePGPDataEncryptorBuilder(algorithm.getAlgorithmId())
+                        .setWithIntegrityPacket(true)
+                        .setSecureRandom(new SecureRandom())
+                        .setProvider("BC"));
+
+        encGen.addMethod(new JcePBEKeyEncryptionMethodGenerator(password).setProvider("BC"));
+
+        OutputStream encOut = encGen.open(bOut, compressedData.length);
+
+        encOut.write(compressedData);
+        encOut.close();
+
+        return bOut.toByteArray();
+    }
+
+    public static byte[] symmetricallyDecrypt(byte[] data, char[] password) throws IOException, PGPException {
+        InputStream in = new BufferedInputStream(new ByteArrayInputStream(data));
+        in = PGPUtil.getDecoderStream(in);
+
+        BcPGPObjectFactory pgpF = new BcPGPObjectFactory(in);
+        PGPEncryptedDataList enc;
+        Object o = pgpF.nextObject();
+
+        if (o instanceof PGPEncryptedDataList) {
+            enc = (PGPEncryptedDataList) o;
+        } else {
+            enc = (PGPEncryptedDataList) pgpF.nextObject();
+        }
+
+        PGPPBEEncryptedData pbe = (PGPPBEEncryptedData) enc.get(0);
+
+        InputStream clear = pbe.getDataStream(new BcPBEDataDecryptorFactory(
+                password, new BcPGPDigestCalculatorProvider()));
+
+
+        BcPGPObjectFactory pgpFact = new BcPGPObjectFactory(clear);
+
+        o = pgpFact.nextObject();
+        if (o instanceof PGPCompressedData) {
+            PGPCompressedData   cData = (PGPCompressedData) o;
+            pgpFact = new BcPGPObjectFactory(cData.getDataStream());
+            o = pgpFact.nextObject();
+        }
+
+        PGPLiteralData ld = (PGPLiteralData) o;
+        InputStream unc = ld.getInputStream();
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+        Streams.pipeAll(unc, outputStream);
+
+        outputStream.close();
+
+        if (pbe.isIntegrityProtected()) {
+            if (!pbe.verify()) {
+                throw new PGPException("Integrity check failed.");
+            }
+        } else {
+            throw new PGPException("Symmetrically encrypted data is not integrity protected.");
+        }
+
+        return outputStream.toByteArray();
+    }
+
+    private static byte[] compress(byte[] clearData, int algorithm) throws IOException
+    {
+        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
+        PGPCompressedDataGenerator comData = new PGPCompressedDataGenerator(algorithm);
+        OutputStream cos = comData.open(bOut);
+
+        PGPLiteralDataGenerator lData = new PGPLiteralDataGenerator();
+
+        OutputStream  pOut = lData.open(cos,
+                PGPLiteralData.BINARY,
+                PGPLiteralDataGenerator.CONSOLE,
+                clearData.length,
+                new Date()
+        );
+
+        pOut.write(clearData);
+        pOut.close();
+
+        comData.close();
+
+        return bOut.toByteArray();
+    }
+
+}

src/main/java/de/vanitasvitae/crypto/pgpainless/util/BCUtil.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.util;
 
 import java.io.IOException;
@@ -42,8 +57,7 @@ public class BCUtil {
             PGPPublicKeyRing pubring = constructor.newInstance(list);
             return pubring;
         } catch (NoSuchMethodException | IllegalAccessException | InstantiationException | InvocationTargetException e) {
-            e.printStackTrace();
-            return null;
+            throw new AssertionError(e);
         }
     }
 }

src/main/java/de/vanitasvitae/crypto/pgpainless/util/MultiMap.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless.util;
 
 import java.util.Collection;

src/test/java/de/vanitasvitae/crypto/pgpainless/AbstractPGPainlessTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import java.security.Security;

src/test/java/de/vanitasvitae/crypto/pgpainless/BCUtilTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import static junit.framework.TestCase.assertEquals;
@@ -19,9 +34,8 @@ public class BCUtilTest extends AbstractPGPainlessTest {
 
     @Test
     public void test()
-            throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException,
-            IOException {
-        PGPSecretKeyRing sec = PGPainless.generateKeyRing().simpleEcKeyRing("Hallo Welt");
+            throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException {
+        PGPSecretKeyRing sec = PGPainless.generateKeyRing().simpleEcKeyRing("donald@duck.tails");
         PGPPublicKeyRing pub = BCUtil.publicKeyRingFromSecretKeyRing(sec);
 
         int secSize = 0;

src/test/java/de/vanitasvitae/crypto/pgpainless/EncryptDecryptTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import static junit.framework.TestCase.assertTrue;
@@ -15,6 +30,7 @@ import java.util.Collections;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import de.vanitasvitae.crypto.pgpainless.algorithm.PublicKeyAlgorithm;
 import de.vanitasvitae.crypto.pgpainless.decryption_verification.DecryptionStream;
 import de.vanitasvitae.crypto.pgpainless.decryption_verification.PainlessResult;
 import de.vanitasvitae.crypto.pgpainless.key.SecretKeyRingProtector;
@@ -30,8 +46,20 @@ import org.junit.Test;
 
 public class EncryptDecryptTest extends AbstractPGPainlessTest {
 
+    private static final Logger LOGGER = Logger.getLogger(EncryptDecryptTest.class.getName());
     private static final Charset UTF8 = Charset.forName("UTF-8");
 
+    private static final String testMessage = "Ah, Juliet, if the measure of thy joy\n" +
+            "Be heaped like mine, and that thy skill be more\n" +
+            "To blazon it, then sweeten with thy breath\n" +
+            "This neighbor air, and let rich music’s tongue\n" +
+            "Unfold the imagined happiness that both\n" +
+            "Receive in either by this dear encounter.";
+
+    public EncryptDecryptTest() {
+        LOGGER.log(Level.INFO, "Plain Length: " + testMessage.getBytes(UTF8).length);
+    }
+
     @Test
     public void freshKeysRsaToRsaTest()
             throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException,
@@ -80,12 +108,7 @@ public class EncryptDecryptTest extends AbstractPGPainlessTest {
 
         SecretKeyRingProtector keyDecryptor = new UnprotectedKeysProtector();
 
-        byte[] secretMessage = ("Ah, Juliet, if the measure of thy joy\n" +
-                "Be heaped like mine, and that thy skill be more\n" +
-                "To blazon it, then sweeten with thy breath\n" +
-                "This neighbor air, and let rich music’s tongue\n" +
-                "Unfold the imagined happiness that both\n" +
-                "Receive in either by this dear encounter.").getBytes(UTF8);
+        byte[] secretMessage = (testMessage).getBytes(UTF8);
 
         ByteArrayOutputStream envelope = new ByteArrayOutputStream();
 
@@ -100,6 +123,10 @@ public class EncryptDecryptTest extends AbstractPGPainlessTest {
         encryptor.close();
         byte[] encryptedSecretMessage = envelope.toByteArray();
 
+        LOGGER.log(Level.INFO, "Sender: " + PublicKeyAlgorithm.fromId(sender.getPublicKey().getAlgorithm()) +
+        " Receiver: " + PublicKeyAlgorithm.fromId(recipient.getPublicKey().getAlgorithm()) +
+        " Encrypted Length: " + encryptedSecretMessage.length);
+
         // Juliet trieth to comprehend Romeos words
 
         ByteArrayInputStream envelopeIn = new ByteArrayInputStream(encryptedSecretMessage);

src/test/java/de/vanitasvitae/crypto/pgpainless/LengthTest.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.vanitasvitae.crypto.pgpainless;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.util.Random;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import de.vanitasvitae.crypto.pgpainless.key.SecretKeyRingProtector;
+import de.vanitasvitae.crypto.pgpainless.key.UnprotectedKeysProtector;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.length.RsaLength;
+import de.vanitasvitae.crypto.pgpainless.util.BCUtil;
+import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.PGPPublicKeyRing;
+import org.bouncycastle.openpgp.PGPSecretKeyRing;
+import org.bouncycastle.util.io.Streams;
+import org.junit.Ignore;
+import org.junit.Test;
+
+/**
+ * Class used to determine the length of cipher-text depending on used algorithms.
+ */
+public class LengthTest extends AbstractPGPainlessTest {
+
+    private static final Logger LOGGER = Logger.getLogger(LengthTest.class.getName());
+
+    //@Test
+    public void ecEc()
+            throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException,
+            IOException {
+        LOGGER.log(Level.INFO, "\nEC -> EC");
+        PGPSecretKeyRing sender = PGPainless.generateKeyRing().simpleEcKeyRing("simplejid@server.tld");
+        PGPSecretKeyRing recipient = PGPainless.generateKeyRing().simpleEcKeyRing("otherjid@other.srv");
+        encryptDecryptForSecretKeyRings(sender, recipient);
+    }
+
+
+    //@Test
+    public void RsaRsa()
+            throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException,
+            IOException {
+        LOGGER.log(Level.INFO, "\nRSA-2048 -> RSA-2048");
+        PGPSecretKeyRing sender = PGPainless.generateKeyRing().simpleRsaKeyRing("simplejid@server.tld", RsaLength._2048);
+        PGPSecretKeyRing recipient = PGPainless.generateKeyRing().simpleRsaKeyRing("otherjid@other.srv", RsaLength._2048);
+        encryptDecryptForSecretKeyRings(sender, recipient);
+    }
+
+    //@Test
+    public void RsaRsa4096()
+            throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException,
+            IOException {
+        LOGGER.log(Level.INFO, "\nRSA-4096 -> RSA-4096");
+        PGPSecretKeyRing sender = PGPainless.generateKeyRing().simpleRsaKeyRing("simplejid@server.tld", RsaLength._4096);
+        PGPSecretKeyRing recipient = PGPainless.generateKeyRing().simpleRsaKeyRing("otherjid@other.srv", RsaLength._4096);
+        encryptDecryptForSecretKeyRings(sender, recipient);
+    }
+
+    //@Test
+    public void rsaEc() throws PGPException, IOException, InvalidAlgorithmParameterException, NoSuchAlgorithmException,
+            NoSuchProviderException {
+        LOGGER.log(Level.INFO, "\nRSA-2048 -> EC");
+        PGPSecretKeyRing sender = PGPainless.generateKeyRing().simpleRsaKeyRing("simplejid@server.tld", RsaLength._2048);
+        PGPSecretKeyRing recipient = PGPainless.generateKeyRing().simpleEcKeyRing("otherjid@other.srv");
+        encryptDecryptForSecretKeyRings(sender, recipient);
+    }
+
+    //@Test
+    public void ecRsa()
+            throws PGPException, NoSuchAlgorithmException, NoSuchProviderException, InvalidAlgorithmParameterException,
+            IOException {
+        LOGGER.log(Level.INFO, "\nEC -> RSA-2048");
+        PGPSecretKeyRing sender = PGPainless.generateKeyRing().simpleEcKeyRing("simplejid@server.tld");
+        PGPSecretKeyRing recipient = PGPainless.generateKeyRing().simpleRsaKeyRing("otherjid@other.srv", RsaLength._2048);
+        encryptDecryptForSecretKeyRings(sender, recipient);
+    }
+
+    @Ignore
+    private void encryptDecryptForSecretKeyRings(PGPSecretKeyRing sender, PGPSecretKeyRing recipient)
+            throws PGPException,
+            IOException {
+        PGPPublicKeyRing recipientPub = BCUtil.publicKeyRingFromSecretKeyRing(recipient);
+        PGPPublicKeyRing senderPub = BCUtil.publicKeyRingFromSecretKeyRing(sender);
+
+        SecretKeyRingProtector keyDecryptor = new UnprotectedKeysProtector();
+
+        for (int i = 1; i <= 100; i++) {
+            byte[] secretMessage = new byte[i * 20];
+            new Random().nextBytes(secretMessage);
+
+            ByteArrayOutputStream envelope = new ByteArrayOutputStream();
+
+            OutputStream encryptor = PGPainless.createEncryptor()
+                    .onOutputStream(envelope)
+                    .toRecipients(recipientPub)
+                    //.doNotEncrypt()
+                    .usingSecureAlgorithms()
+                    .signWith(keyDecryptor, sender)
+                    .noArmor();
+
+            Streams.pipeAll(new ByteArrayInputStream(secretMessage), encryptor);
+            encryptor.close();
+            byte[] encryptedSecretMessage = envelope.toByteArray();
+
+            LOGGER.log(Level.INFO,"\n" + encryptedSecretMessage.length);
+        }
+    }
+}

src/test/java/de/vanitasvitae/crypto/pgpainless/SymmetricTest.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.vanitasvitae.crypto.pgpainless;
+
+import static junit.framework.TestCase.assertTrue;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Arrays;
+
+import de.vanitasvitae.crypto.pgpainless.algorithm.SymmetricKeyAlgorithm;
+import org.bouncycastle.bcpg.ArmoredOutputStream;
+import org.bouncycastle.openpgp.PGPException;
+import org.junit.Test;
+
+public class SymmetricTest extends AbstractPGPainlessTest {
+
+    private static final String message = "I grew up with the understanding that the world " +
+            "I lived in was one where people enjoyed a sort of freedom " +
+            "to communicate with each other in privacy, without it " +
+            "being monitored, without it being measured or analyzed " +
+            "or sort of judged by these shadowy figures or systems, " +
+            "any time they mention anything that travels across " +
+            "public lines.\n" +
+            "\n" +
+            "- Edward Snowden -";
+
+    @Test
+    public void testSymmetricEncryptionDecryption() throws IOException, PGPException {
+        byte[] plain = message.getBytes();
+        byte[] enc = PGPainless.encryptWithPassword(plain, "choose_a_better_password_please".toCharArray(), SymmetricKeyAlgorithm.AES_128);
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        ArmoredOutputStream armor = new ArmoredOutputStream(out);
+        armor.write(enc);
+        armor.flush();
+        armor.close();
+
+        // Print cipher text for validation with GnuPG.
+        System.out.println(new String(out.toByteArray()));
+
+        byte[] plain2 = PGPainless.decryptWithPassword(enc, "choose_a_better_password_please".toCharArray());
+        assertTrue(Arrays.equals(plain, plain2));
+    }
+}

src/test/java/de/vanitasvitae/crypto/pgpainless/TestKeys.java

@@ -1,5 +1,4 @@
-/**
- *
+/*
  * Copyright 2018 Paul Schaub.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");

src/test/java/de/vanitasvitae/crypto/pgpainless/TestKeysTest.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright 2018 Paul Schaub.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package de.vanitasvitae.crypto.pgpainless;
 
 import static junit.framework.TestCase.assertEquals;