Kotlin conversion: ImplementationFactory classes

2024-11-19 02:42:05 +01:00 · 2023-10-04 14:18:26 +02:00 · 2023-10-04 14:18:26 +02:00 · 1cdce5c93a
commit 1cdce5c93a
parent d707dcf74a
11 changed files with 299 additions and 430 deletions
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/BcImplementationFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/BcImplementationFactory.java
@ -1,154 +0,0 @@
-// SPDX-FileCopyrightText: 2020 Paul Schaub <vanitasvitae@fsfe.org>
-//
-// SPDX-License-Identifier: Apache-2.0
-
-package org.pgpainless.implementation;
-
-import java.io.InputStream;
-import java.security.KeyPair;
-import java.util.Date;
-
-import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
-import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
-import org.bouncycastle.openpgp.PGPException;
-import org.bouncycastle.openpgp.PGPKeyPair;
-import org.bouncycastle.openpgp.PGPObjectFactory;
-import org.bouncycastle.openpgp.PGPPrivateKey;
-import org.bouncycastle.openpgp.PGPPublicKey;
-import org.bouncycastle.openpgp.PGPSessionKey;
-import org.bouncycastle.openpgp.bc.BcPGPObjectFactory;
-import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
-import org.bouncycastle.openpgp.operator.PBEDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.PBEKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor;
-import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
-import org.bouncycastle.openpgp.operator.PGPContentSignerBuilder;
-import org.bouncycastle.openpgp.operator.PGPContentVerifierBuilderProvider;
-import org.bouncycastle.openpgp.operator.PGPDataEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.PGPDigestCalculator;
-import org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.SessionKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.bc.BcKeyFingerprintCalculator;
-import org.bouncycastle.openpgp.operator.bc.BcPBEDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.bc.BcPBEKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.bc.BcPBESecretKeyDecryptorBuilder;
-import org.bouncycastle.openpgp.operator.bc.BcPBESecretKeyEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.bc.BcPGPContentSignerBuilder;
-import org.bouncycastle.openpgp.operator.bc.BcPGPContentVerifierBuilderProvider;
-import org.bouncycastle.openpgp.operator.bc.BcPGPDataEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.bc.BcPGPDigestCalculatorProvider;
-import org.bouncycastle.openpgp.operator.bc.BcPGPKeyConverter;
-import org.bouncycastle.openpgp.operator.bc.BcPGPKeyPair;
-import org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.bc.BcPublicKeyKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.bc.BcSessionKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyPair;
-import org.pgpainless.algorithm.HashAlgorithm;
-import org.pgpainless.algorithm.PublicKeyAlgorithm;
-import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
-import org.pgpainless.util.Passphrase;
-
-public class BcImplementationFactory extends ImplementationFactory {
-
-    @Override
-    public PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm symmetricKeyAlgorithm,
-                                                          PGPDigestCalculator digestCalculator,
-                                                          Passphrase passphrase) {
-        return new BcPBESecretKeyEncryptorBuilder(symmetricKeyAlgorithm.getAlgorithmId(), digestCalculator)
-                .build(passphrase.getChars());
-    }
-
-    @Override
-    public PBESecretKeyDecryptor getPBESecretKeyDecryptor(Passphrase passphrase) {
-        return new BcPBESecretKeyDecryptorBuilder(getPGPDigestCalculatorProvider())
-                .build(passphrase.getChars());
-    }
-
-    @Override
-    public BcPGPDigestCalculatorProvider getPGPDigestCalculatorProvider() {
-        return new BcPGPDigestCalculatorProvider();
-    }
-
-    @Override
-    public PGPContentVerifierBuilderProvider getPGPContentVerifierBuilderProvider() {
-        return new BcPGPContentVerifierBuilderProvider();
-    }
-
-    @Override
-    public PGPContentSignerBuilder getPGPContentSignerBuilder(int keyAlgorithm, int hashAlgorithm) {
-        return new BcPGPContentSignerBuilder(keyAlgorithm, hashAlgorithm);
-    }
-
-    @Override
-    public KeyFingerPrintCalculator getKeyFingerprintCalculator() {
-        return new BcKeyFingerprintCalculator();
-    }
-
-    @Override
-    public PBEDataDecryptorFactory getPBEDataDecryptorFactory(Passphrase passphrase) {
-        return new BcPBEDataDecryptorFactory(passphrase.getChars(), getPGPDigestCalculatorProvider());
-    }
-
-    @Override
-    public PublicKeyDataDecryptorFactory getPublicKeyDataDecryptorFactory(PGPPrivateKey privateKey) {
-        return new BcPublicKeyDataDecryptorFactory(privateKey);
-    }
-
-    @Override
-    public SessionKeyDataDecryptorFactory getSessionKeyDataDecryptorFactory(PGPSessionKey sessionKey) {
-        return new BcSessionKeyDataDecryptorFactory(sessionKey);
-    }
-
-    @Override
-    public PublicKeyKeyEncryptionMethodGenerator getPublicKeyKeyEncryptionMethodGenerator(PGPPublicKey key) {
-        return new BcPublicKeyKeyEncryptionMethodGenerator(key);
-    }
-
-    @Override
-    public PBEKeyEncryptionMethodGenerator getPBEKeyEncryptionMethodGenerator(Passphrase passphrase) {
-        return new BcPBEKeyEncryptionMethodGenerator(passphrase.getChars());
-    }
-
-    @Override
-    public PGPDataEncryptorBuilder getPGPDataEncryptorBuilder(int symmetricKeyAlgorithm) {
-        return new BcPGPDataEncryptorBuilder(symmetricKeyAlgorithm);
-    }
-
-    @Override
-    public PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, KeyPair keyPair, Date creationDate)
-            throws PGPException {
-        return new BcPGPKeyPair(algorithm.getAlgorithmId(), jceToBcKeyPair(algorithm, keyPair, creationDate), creationDate);
-    }
-
-    @Override
-    public PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm encryptionAlgorithm, HashAlgorithm hashAlgorithm, int s2kCount, Passphrase passphrase) throws PGPException {
-        return new BcPBESecretKeyEncryptorBuilder(
-                encryptionAlgorithm.getAlgorithmId(),
-                getPGPDigestCalculator(hashAlgorithm),
-                s2kCount)
-                .build(passphrase.getChars());
-    }
-
-    @Override
-    public PGPObjectFactory getPGPObjectFactory(byte[] bytes) {
-        return new BcPGPObjectFactory(bytes);
-    }
-
-    @Override
-    public PGPObjectFactory getPGPObjectFactory(InputStream inputStream) {
-        return new BcPGPObjectFactory(inputStream);
-    }
-
-    private AsymmetricCipherKeyPair jceToBcKeyPair(PublicKeyAlgorithm algorithm,
-                                                   KeyPair keyPair,
-                                                   Date creationDate) throws PGPException {
-        BcPGPKeyConverter converter = new BcPGPKeyConverter();
-
-        PGPKeyPair pair = new JcaPGPKeyPair(algorithm.getAlgorithmId(), keyPair, creationDate);
-        AsymmetricKeyParameter publicKey = converter.getPublicKey(pair.getPublicKey());
-        AsymmetricKeyParameter privateKey = converter.getPrivateKey(pair.getPrivateKey());
-
-        return new AsymmetricCipherKeyPair(publicKey, privateKey);
-    }
-}
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/ImplementationFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/ImplementationFactory.java
@ -1,119 +0,0 @@
-// SPDX-FileCopyrightText: 2020 Paul Schaub <vanitasvitae@fsfe.org>
-//
-// SPDX-License-Identifier: Apache-2.0
-
-package org.pgpainless.implementation;
-
-import java.io.InputStream;
-import java.security.KeyPair;
-import java.util.Date;
-
-import org.bouncycastle.openpgp.PGPException;
-import org.bouncycastle.openpgp.PGPKeyPair;
-import org.bouncycastle.openpgp.PGPObjectFactory;
-import org.bouncycastle.openpgp.PGPPrivateKey;
-import org.bouncycastle.openpgp.PGPPublicKey;
-import org.bouncycastle.openpgp.PGPSessionKey;
-import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
-import org.bouncycastle.openpgp.operator.PBEDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.PBEKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor;
-import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
-import org.bouncycastle.openpgp.operator.PGPContentSignerBuilder;
-import org.bouncycastle.openpgp.operator.PGPContentVerifierBuilderProvider;
-import org.bouncycastle.openpgp.operator.PGPDataEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.PGPDigestCalculator;
-import org.bouncycastle.openpgp.operator.PGPDigestCalculatorProvider;
-import org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.SessionKeyDataDecryptorFactory;
-import org.pgpainless.algorithm.HashAlgorithm;
-import org.pgpainless.algorithm.PublicKeyAlgorithm;
-import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
-import org.pgpainless.util.Passphrase;
-import org.pgpainless.util.SessionKey;
-
-public abstract class ImplementationFactory {
-
-    private static ImplementationFactory FACTORY_IMPLEMENTATION;
-
-    public static void setFactoryImplementation(ImplementationFactory implementation) {
-        FACTORY_IMPLEMENTATION = implementation;
-    }
-
-    public static ImplementationFactory getInstance() {
-        if (FACTORY_IMPLEMENTATION == null) {
-            FACTORY_IMPLEMENTATION = new BcImplementationFactory();
-        }
-        return FACTORY_IMPLEMENTATION;
-    }
-
-    public abstract PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm symmetricKeyAlgorithm,
-                                                                   PGPDigestCalculator digestCalculator,
-                                                                   Passphrase passphrase);
-
-    public abstract PBESecretKeyDecryptor getPBESecretKeyDecryptor(Passphrase passphrase) throws PGPException;
-
-    public PGPDigestCalculator getV4FingerprintCalculator() throws PGPException {
-        return getPGPDigestCalculator(HashAlgorithm.SHA1);
-    }
-
-    public PGPDigestCalculator getPGPDigestCalculator(HashAlgorithm algorithm) throws PGPException {
-        return getPGPDigestCalculator(algorithm.getAlgorithmId());
-    }
-
-    public PGPDigestCalculator getPGPDigestCalculator(int algorithm) throws PGPException {
-        return getPGPDigestCalculatorProvider().get(algorithm);
-    }
-
-    public abstract PGPDigestCalculatorProvider getPGPDigestCalculatorProvider() throws PGPException;
-
-    public abstract PGPContentVerifierBuilderProvider getPGPContentVerifierBuilderProvider();
-
-    public PGPContentSignerBuilder getPGPContentSignerBuilder(PublicKeyAlgorithm keyAlgorithm, HashAlgorithm hashAlgorithm) {
-        return getPGPContentSignerBuilder(keyAlgorithm.getAlgorithmId(), hashAlgorithm.getAlgorithmId());
-    }
-
-    public abstract PGPContentSignerBuilder getPGPContentSignerBuilder(int keyAlgorithm, int hashAlgorithm);
-
-    public abstract KeyFingerPrintCalculator getKeyFingerprintCalculator();
-
-    public abstract PBEDataDecryptorFactory getPBEDataDecryptorFactory(Passphrase passphrase) throws PGPException;
-
-    public abstract PublicKeyDataDecryptorFactory getPublicKeyDataDecryptorFactory(PGPPrivateKey privateKey);
-
-    public SessionKeyDataDecryptorFactory getSessionKeyDataDecryptorFactory(SessionKey sessionKey) {
-        PGPSessionKey pgpSessionKey = new PGPSessionKey(
-                sessionKey.getAlgorithm().getAlgorithmId(),
-                sessionKey.getKey()
-        );
-        return getSessionKeyDataDecryptorFactory(pgpSessionKey);
-    }
-
-    public abstract SessionKeyDataDecryptorFactory getSessionKeyDataDecryptorFactory(PGPSessionKey sessionKey);
-
-    public abstract PublicKeyKeyEncryptionMethodGenerator getPublicKeyKeyEncryptionMethodGenerator(PGPPublicKey key);
-
-    public abstract PBEKeyEncryptionMethodGenerator getPBEKeyEncryptionMethodGenerator(Passphrase passphrase);
-
-    public PGPDataEncryptorBuilder getPGPDataEncryptorBuilder(SymmetricKeyAlgorithm symmetricKeyAlgorithm) {
-        return getPGPDataEncryptorBuilder(symmetricKeyAlgorithm.getAlgorithmId());
-    }
-
-    public abstract PGPDataEncryptorBuilder getPGPDataEncryptorBuilder(int symmetricKeyAlgorithm);
-
-    public abstract PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, KeyPair keyPair, Date creationDate) throws PGPException;
-
-    public abstract PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm encryptionAlgorithm,
-                                                                   HashAlgorithm hashAlgorithm, int s2kCount,
-                                                                   Passphrase passphrase) throws PGPException;
-
-    public abstract PGPObjectFactory getPGPObjectFactory(InputStream inputStream);
-
-    public abstract PGPObjectFactory getPGPObjectFactory(byte[] bytes);
-
-    @Override
-    public String toString() {
-        return getClass().getSimpleName();
-    }
-}
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/JceImplementationFactory.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/JceImplementationFactory.java
@ -1,141 +0,0 @@
-// SPDX-FileCopyrightText: 2020 Paul Schaub <vanitasvitae@fsfe.org>
-//
-// SPDX-License-Identifier: Apache-2.0
-
-package org.pgpainless.implementation;
-
-import java.io.InputStream;
-import java.security.KeyPair;
-import java.util.Date;
-
-import org.bouncycastle.openpgp.PGPException;
-import org.bouncycastle.openpgp.PGPKeyPair;
-import org.bouncycastle.openpgp.PGPObjectFactory;
-import org.bouncycastle.openpgp.PGPPrivateKey;
-import org.bouncycastle.openpgp.PGPPublicKey;
-import org.bouncycastle.openpgp.PGPSessionKey;
-import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
-import org.bouncycastle.openpgp.operator.PBEDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.PBEKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor;
-import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
-import org.bouncycastle.openpgp.operator.PGPContentSignerBuilder;
-import org.bouncycastle.openpgp.operator.PGPContentVerifierBuilderProvider;
-import org.bouncycastle.openpgp.operator.PGPDataEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.PGPDigestCalculator;
-import org.bouncycastle.openpgp.operator.PGPDigestCalculatorProvider;
-import org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.SessionKeyDataDecryptorFactory;
-import org.bouncycastle.openpgp.operator.jcajce.JcaKeyFingerprintCalculator;
-import org.bouncycastle.openpgp.operator.jcajce.JcaPGPContentSignerBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcaPGPContentVerifierBuilderProvider;
-import org.bouncycastle.openpgp.operator.jcajce.JcaPGPDigestCalculatorProviderBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyPair;
-import org.bouncycastle.openpgp.operator.jcajce.JcePBEDataDecryptorFactoryBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcePBEKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcePBESecretKeyEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyDataDecryptorFactoryBuilder;
-import org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyKeyEncryptionMethodGenerator;
-import org.bouncycastle.openpgp.operator.jcajce.JceSessionKeyDataDecryptorFactoryBuilder;
-import org.pgpainless.algorithm.HashAlgorithm;
-import org.pgpainless.algorithm.PublicKeyAlgorithm;
-import org.pgpainless.algorithm.SymmetricKeyAlgorithm;
-import org.pgpainless.provider.ProviderFactory;
-import org.pgpainless.util.Passphrase;
-
-public class JceImplementationFactory extends ImplementationFactory {
-
-    public PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm symmetricKeyAlgorithm, PGPDigestCalculator digestCalculator, Passphrase passphrase) {
-        return new JcePBESecretKeyEncryptorBuilder(symmetricKeyAlgorithm.getAlgorithmId(), digestCalculator)
-                .setProvider(ProviderFactory.getProvider())
-                .build(passphrase.getChars());
-    }
-
-    public PBESecretKeyDecryptor getPBESecretKeyDecryptor(Passphrase passphrase) throws PGPException {
-        return new JcePBESecretKeyDecryptorBuilder(getPGPDigestCalculatorProvider())
-                .setProvider(ProviderFactory.getProvider())
-                .build(passphrase.getChars());
-    }
-
-    public PGPDigestCalculatorProvider getPGPDigestCalculatorProvider()
-            throws PGPException {
-        return new JcaPGPDigestCalculatorProviderBuilder()
-                .setProvider(ProviderFactory.getProvider())
-                .build();
-    }
-
-    public PGPContentVerifierBuilderProvider getPGPContentVerifierBuilderProvider() {
-        return new JcaPGPContentVerifierBuilderProvider()
-                .setProvider(ProviderFactory.getProvider());
-    }
-
-    public PGPContentSignerBuilder getPGPContentSignerBuilder(int keyAlgorithm, int hashAlgorithm) {
-        return new JcaPGPContentSignerBuilder(keyAlgorithm, hashAlgorithm)
-                .setProvider(ProviderFactory.getProvider());
-    }
-
-    public KeyFingerPrintCalculator getKeyFingerprintCalculator() {
-        return new JcaKeyFingerprintCalculator()
-                .setProvider(ProviderFactory.getProvider());
-    }
-
-    public PBEDataDecryptorFactory getPBEDataDecryptorFactory(Passphrase passphrase)
-            throws PGPException {
-        return new JcePBEDataDecryptorFactoryBuilder(getPGPDigestCalculatorProvider())
-                .setProvider(ProviderFactory.getProvider())
-                .build(passphrase.getChars());
-    }
-
-    public PublicKeyDataDecryptorFactory getPublicKeyDataDecryptorFactory(PGPPrivateKey privateKey) {
-        return new JcePublicKeyDataDecryptorFactoryBuilder()
-                .setProvider(ProviderFactory.getProvider())
-                .build(privateKey);
-    }
-
-    @Override
-    public SessionKeyDataDecryptorFactory getSessionKeyDataDecryptorFactory(PGPSessionKey sessionKey) {
-            return new JceSessionKeyDataDecryptorFactoryBuilder()
-                    .build(sessionKey);
-    }
-
-    public PublicKeyKeyEncryptionMethodGenerator getPublicKeyKeyEncryptionMethodGenerator(PGPPublicKey key) {
-        return new JcePublicKeyKeyEncryptionMethodGenerator(key)
-                .setProvider(ProviderFactory.getProvider());
-    }
-
-    public PBEKeyEncryptionMethodGenerator getPBEKeyEncryptionMethodGenerator(Passphrase passphrase) {
-        return new JcePBEKeyEncryptionMethodGenerator(passphrase.getChars())
-                .setProvider(ProviderFactory.getProvider());
-    }
-
-    public PGPDataEncryptorBuilder getPGPDataEncryptorBuilder(int symmetricKeyAlgorithm) {
-        return new JcePGPDataEncryptorBuilder(symmetricKeyAlgorithm)
-                .setProvider(ProviderFactory.getProvider());
-    }
-
-    public PGPKeyPair getPGPKeyPair(PublicKeyAlgorithm algorithm, KeyPair keyPair, Date creationDate) throws PGPException {
-        return new JcaPGPKeyPair(algorithm.getAlgorithmId(), keyPair, creationDate);
-    }
-
-    public PBESecretKeyEncryptor getPBESecretKeyEncryptor(SymmetricKeyAlgorithm encryptionAlgorithm, HashAlgorithm hashAlgorithm, int s2kCount, Passphrase passphrase) throws PGPException {
-        return new JcePBESecretKeyEncryptorBuilder(
-                encryptionAlgorithm.getAlgorithmId(),
-                getPGPDigestCalculator(hashAlgorithm),
-                s2kCount)
-                .setProvider(ProviderFactory.getProvider())
-                .build(passphrase.getChars());
-    }
-
-    @Override
-    public PGPObjectFactory getPGPObjectFactory(InputStream inputStream) {
-        return new PGPObjectFactory(inputStream, ImplementationFactory.getInstance().getKeyFingerprintCalculator());
-    }
-
-    @Override
-    public PGPObjectFactory getPGPObjectFactory(byte[] bytes) {
-        return new PGPObjectFactory(bytes, ImplementationFactory.getInstance().getKeyFingerprintCalculator());
-    }
-}
--- a/pgpainless-core/src/main/java/org/pgpainless/implementation/package-info.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/implementation/package-info.java
@ -1,8 +0,0 @@
-// SPDX-FileCopyrightText: 2020 Paul Schaub <vanitasvitae@fsfe.org>
-//
-// SPDX-License-Identifier: Apache-2.0
-
-/**
- * Implementation factory classes to be able to switch out the underlying crypto engine implementation.
- */
-package org.pgpainless.implementation;
--- a/pgpainless-core/src/main/java/org/pgpainless/key/util/PublicKeyParameterValidationUtil.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/key/util/PublicKeyParameterValidationUtil.java
@ -120,7 +120,7 @@ public class PublicKeyParameterValidationUtil {
            signatureGenerator.update(data);
            PGPSignature sig = signatureGenerator.generate();

-            sig.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), publicKey);
+            sig.init(ImplementationFactory.getInstance().getPgpContentVerifierBuilderProvider(), publicKey);
            sig.update(data);
            return sig.verify();
        } catch (PGPException e) {
--- a/pgpainless-core/src/main/java/org/pgpainless/signature/consumer/SignatureValidator.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/signature/consumer/SignatureValidator.java
@ -495,7 +495,7 @@ public abstract class SignatureValidator {
                }
                try {
                    signature.init(ImplementationFactory.getInstance()
-                            .getPGPContentVerifierBuilderProvider(), primaryKey);
+                            .getPgpContentVerifierBuilderProvider(), primaryKey);
                    boolean valid = signature.verifyCertification(primaryKey, subkey);
                    if (!valid) {
                        throw new SignatureValidationException("Signature is not correct.");
@ -519,7 +519,7 @@ public abstract class SignatureValidator {
            @Override
            public void verify(PGPSignature signature) throws SignatureValidationException {
                try {
-                    signature.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), subkey);
+                    signature.init(ImplementationFactory.getInstance().getPgpContentVerifierBuilderProvider(), subkey);
                    boolean valid = signature.verifyCertification(primaryKey, subkey);
                    if (!valid) {
                        throw new SignatureValidationException("Primary Key Binding Signature is not correct.");
@ -544,7 +544,7 @@ public abstract class SignatureValidator {
            @Override
            public void verify(PGPSignature signature) throws SignatureValidationException {
                try {
-                    signature.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), signer);
+                    signature.init(ImplementationFactory.getInstance().getPgpContentVerifierBuilderProvider(), signer);
                    boolean valid;
                    if (signer.getKeyID() == signee.getKeyID() || signature.getSignatureType() == PGPSignature.DIRECT_KEY) {
                        valid = signature.verifyCertification(signee);
@ -615,7 +615,7 @@ public abstract class SignatureValidator {
            public void verify(PGPSignature signature) throws SignatureValidationException {
                try {
                    signature.init(ImplementationFactory.getInstance()
-                            .getPGPContentVerifierBuilderProvider(), certifyingKey);
+                            .getPgpContentVerifierBuilderProvider(), certifyingKey);
                    boolean valid = signature.verifyCertification(userId, certifiedKey);
                    if (!valid) {
                        throw new SignatureValidationException("Signature over user-id '" + userId +
@ -645,7 +645,7 @@ public abstract class SignatureValidator {
            public void verify(PGPSignature signature) throws SignatureValidationException {
                try {
                    signature.init(ImplementationFactory.getInstance()
-                            .getPGPContentVerifierBuilderProvider(), certifyingKey);
+                            .getPgpContentVerifierBuilderProvider(), certifyingKey);
                    boolean valid = signature.verifyCertification(userAttributes, certifiedKey);
                    if (!valid) {
                        throw new SignatureValidationException("Signature over user-attribute vector is not correct.");
--- a/pgpainless-core/src/main/java/org/pgpainless/signature/consumer/SignatureVerifier.java
+++ b/pgpainless-core/src/main/java/org/pgpainless/signature/consumer/SignatureVerifier.java
@ -384,7 +384,7 @@ public final class SignatureVerifier {
                                                                  PGPPublicKey signingKey)
            throws SignatureValidationException {
        try {
-            signature.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), signingKey);
+            signature.init(ImplementationFactory.getInstance().getPgpContentVerifierBuilderProvider(), signingKey);
            int read;
            byte[] buf = new byte[8192];
            byte lastByte = -1;
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/implementation/BcImplementationFactory.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/implementation/BcImplementationFactory.kt
@ -0,0 +1,96 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package org.pgpainless.implementation
+
+import org.bouncycastle.crypto.AsymmetricCipherKeyPair
+import org.bouncycastle.openpgp.*
+import org.bouncycastle.openpgp.bc.BcPGPObjectFactory
+import org.bouncycastle.openpgp.operator.*
+import org.bouncycastle.openpgp.operator.bc.BcKeyFingerprintCalculator
+import org.bouncycastle.openpgp.operator.bc.BcPBEDataDecryptorFactory
+import org.bouncycastle.openpgp.operator.bc.BcPBEKeyEncryptionMethodGenerator
+import org.bouncycastle.openpgp.operator.bc.BcPBESecretKeyDecryptorBuilder
+import org.bouncycastle.openpgp.operator.bc.BcPBESecretKeyEncryptorBuilder
+import org.bouncycastle.openpgp.operator.bc.BcPGPContentSignerBuilder
+import org.bouncycastle.openpgp.operator.bc.BcPGPContentVerifierBuilderProvider
+import org.bouncycastle.openpgp.operator.bc.BcPGPDataEncryptorBuilder
+import org.bouncycastle.openpgp.operator.bc.BcPGPDigestCalculatorProvider
+import org.bouncycastle.openpgp.operator.bc.BcPGPKeyConverter
+import org.bouncycastle.openpgp.operator.bc.BcPGPKeyPair
+import org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory
+import org.bouncycastle.openpgp.operator.bc.BcPublicKeyKeyEncryptionMethodGenerator
+import org.bouncycastle.openpgp.operator.bc.BcSessionKeyDataDecryptorFactory
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyPair
+import org.pgpainless.algorithm.HashAlgorithm
+import org.pgpainless.algorithm.PublicKeyAlgorithm
+import org.pgpainless.algorithm.SymmetricKeyAlgorithm
+import org.pgpainless.util.Passphrase
+import java.io.InputStream
+import java.security.KeyPair
+import java.util.*
+
+class BcImplementationFactory : ImplementationFactory() {
+    override val pgpDigestCalculatorProvider: BcPGPDigestCalculatorProvider = BcPGPDigestCalculatorProvider()
+    override val pgpContentVerifierBuilderProvider: BcPGPContentVerifierBuilderProvider = BcPGPContentVerifierBuilderProvider()
+    override val keyFingerprintCalculator: BcKeyFingerprintCalculator = BcKeyFingerprintCalculator()
+
+    override fun getPBESecretKeyEncryptor(symmetricKeyAlgorithm: SymmetricKeyAlgorithm,
+                                          digestCalculator: PGPDigestCalculator,
+                                          passphrase: Passphrase): PBESecretKeyEncryptor =
+            BcPBESecretKeyEncryptorBuilder(symmetricKeyAlgorithm.algorithmId, digestCalculator)
+                    .build(passphrase.getChars())
+
+    override fun getPBESecretKeyEncryptor(encryptionAlgorithm: SymmetricKeyAlgorithm,
+                                          hashAlgorithm: HashAlgorithm,
+                                          s2kCount: Int,
+                                          passphrase: Passphrase): PBESecretKeyEncryptor =
+            BcPBESecretKeyEncryptorBuilder(
+                    encryptionAlgorithm.algorithmId,
+                    getPGPDigestCalculator(hashAlgorithm),
+                    s2kCount)
+                    .build(passphrase.getChars())
+
+    override fun getPBESecretKeyDecryptor(passphrase: Passphrase): PBESecretKeyDecryptor =
+            BcPBESecretKeyDecryptorBuilder(pgpDigestCalculatorProvider)
+                    .build(passphrase.getChars())
+
+    override fun getPGPContentSignerBuilder(keyAlgorithm: Int, hashAlgorithm: Int): PGPContentSignerBuilder =
+            BcPGPContentSignerBuilder(keyAlgorithm, hashAlgorithm)
+
+    override fun getPBEDataDecryptorFactory(passphrase: Passphrase): PBEDataDecryptorFactory =
+            BcPBEDataDecryptorFactory(passphrase.getChars(), pgpDigestCalculatorProvider)
+
+    override fun getPublicKeyDataDecryptorFactory(privateKey: PGPPrivateKey): PublicKeyDataDecryptorFactory =
+            BcPublicKeyDataDecryptorFactory(privateKey)
+
+    override fun getSessionKeyDataDecryptorFactory(sessionKey: PGPSessionKey): SessionKeyDataDecryptorFactory =
+            BcSessionKeyDataDecryptorFactory(sessionKey)
+
+    override fun getPublicKeyKeyEncryptionMethodGenerator(key: PGPPublicKey): PublicKeyKeyEncryptionMethodGenerator =
+            BcPublicKeyKeyEncryptionMethodGenerator(key)
+
+    override fun getPBEKeyEncryptionMethodGenerator(passphrase: Passphrase): PBEKeyEncryptionMethodGenerator =
+            BcPBEKeyEncryptionMethodGenerator(passphrase.getChars())
+
+    override fun getPGPDataEncryptorBuilder(symmetricKeyAlgorithm: Int): PGPDataEncryptorBuilder =
+            BcPGPDataEncryptorBuilder(symmetricKeyAlgorithm)
+
+    override fun getPGPKeyPair(publicKeyAlgorithm: PublicKeyAlgorithm, keyPair: KeyPair, creationDate: Date): PGPKeyPair =
+            BcPGPKeyPair(
+                    publicKeyAlgorithm.algorithmId,
+                    jceToBcKeyPair(publicKeyAlgorithm, keyPair, creationDate),
+                    creationDate)
+
+    override fun getPGPObjectFactory(inputStream: InputStream): PGPObjectFactory = BcPGPObjectFactory(inputStream)
+
+    private fun jceToBcKeyPair(publicKeyAlgorithm: PublicKeyAlgorithm,
+                               keyPair: KeyPair,
+                               creationDate: Date): AsymmetricCipherKeyPair =
+            BcPGPKeyConverter().let { converter ->
+                JcaPGPKeyPair(publicKeyAlgorithm.algorithmId, keyPair, creationDate).let { pair ->
+                    AsymmetricCipherKeyPair(converter.getPublicKey(pair.publicKey), converter.getPrivateKey(pair.privateKey))
+                }
+            }
+}
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/implementation/ImplementationFactory.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/implementation/ImplementationFactory.kt
@ -0,0 +1,93 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package org.pgpainless.implementation
+
+import org.bouncycastle.openpgp.*
+import org.bouncycastle.openpgp.operator.*
+import org.pgpainless.algorithm.HashAlgorithm
+import org.pgpainless.algorithm.PublicKeyAlgorithm
+import org.pgpainless.algorithm.SymmetricKeyAlgorithm
+import org.pgpainless.util.Passphrase
+import org.pgpainless.util.SessionKey
+import java.io.InputStream
+import java.security.KeyPair
+import java.util.*
+
+abstract class ImplementationFactory {
+
+    companion object {
+        @JvmStatic
+        private var instance: ImplementationFactory = BcImplementationFactory()
+
+        @JvmStatic
+        fun getInstance() = instance
+
+        @JvmStatic
+        fun setFactoryImplementation(implementation: ImplementationFactory) = apply {
+            instance = implementation
+        }
+    }
+
+    abstract val pgpDigestCalculatorProvider: PGPDigestCalculatorProvider
+    abstract val pgpContentVerifierBuilderProvider: PGPContentVerifierBuilderProvider
+    abstract val keyFingerprintCalculator: KeyFingerPrintCalculator
+
+    val v4FingerprintCalculator: PGPDigestCalculator
+        get() = getPGPDigestCalculator(HashAlgorithm.SHA1)
+
+    @Throws(PGPException::class)
+    abstract fun getPBESecretKeyEncryptor(symmetricKeyAlgorithm: SymmetricKeyAlgorithm,
+                                          digestCalculator: PGPDigestCalculator,
+                                          passphrase: Passphrase): PBESecretKeyEncryptor
+
+    @Throws(PGPException::class)
+    abstract fun getPBESecretKeyDecryptor(passphrase: Passphrase): PBESecretKeyDecryptor
+
+    @Throws(PGPException::class)
+    abstract fun getPBESecretKeyEncryptor(encryptionAlgorithm: SymmetricKeyAlgorithm, hashAlgorithm: HashAlgorithm,
+                                          s2kCount: Int, passphrase: Passphrase): PBESecretKeyEncryptor
+
+    fun getPGPDigestCalculator(hashAlgorithm: HashAlgorithm): PGPDigestCalculator =
+            getPGPDigestCalculator(hashAlgorithm.algorithmId)
+
+    fun getPGPDigestCalculator(hashAlgorithm: Int): PGPDigestCalculator =
+            pgpDigestCalculatorProvider.get(hashAlgorithm)
+
+    fun getPGPContentSignerBuilder(keyAlgorithm: PublicKeyAlgorithm, hashAlgorithm: HashAlgorithm): PGPContentSignerBuilder =
+            getPGPContentSignerBuilder(keyAlgorithm.algorithmId, hashAlgorithm.algorithmId)
+
+    abstract fun getPGPContentSignerBuilder(keyAlgorithm: Int, hashAlgorithm: Int): PGPContentSignerBuilder
+
+    @Throws(PGPException::class)
+    abstract fun getPBEDataDecryptorFactory(passphrase: Passphrase): PBEDataDecryptorFactory
+
+    abstract fun getPublicKeyDataDecryptorFactory(privateKey: PGPPrivateKey): PublicKeyDataDecryptorFactory
+
+    fun getSessionKeyDataDecryptorFactory(sessionKey: SessionKey): SessionKeyDataDecryptorFactory =
+            getSessionKeyDataDecryptorFactory(PGPSessionKey(sessionKey.algorithm.algorithmId, sessionKey.key))
+
+    abstract fun getSessionKeyDataDecryptorFactory(sessionKey: PGPSessionKey): SessionKeyDataDecryptorFactory
+
+    abstract fun getPublicKeyKeyEncryptionMethodGenerator(key: PGPPublicKey): PublicKeyKeyEncryptionMethodGenerator
+
+    abstract fun getPBEKeyEncryptionMethodGenerator(passphrase: Passphrase): PBEKeyEncryptionMethodGenerator
+
+    fun getPGPDataEncryptorBuilder(symmetricKeyAlgorithm: SymmetricKeyAlgorithm): PGPDataEncryptorBuilder =
+            getPGPDataEncryptorBuilder(symmetricKeyAlgorithm.algorithmId)
+
+    abstract fun getPGPDataEncryptorBuilder(symmetricKeyAlgorithm: Int): PGPDataEncryptorBuilder
+
+    @Throws(PGPException::class)
+    abstract fun getPGPKeyPair(publicKeyAlgorithm: PublicKeyAlgorithm, keyPair: KeyPair, creationDate: Date): PGPKeyPair
+
+    fun getPGPObjectFactory(bytes: ByteArray): PGPObjectFactory =
+            getPGPObjectFactory(bytes.inputStream())
+
+    abstract fun getPGPObjectFactory(inputStream: InputStream): PGPObjectFactory
+
+    override fun toString(): String {
+        return javaClass.simpleName
+    }
+}
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/implementation/JceImplementationFactory.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/implementation/JceImplementationFactory.kt
@ -0,0 +1,102 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package org.pgpainless.implementation
+
+import org.bouncycastle.openpgp.*
+import org.bouncycastle.openpgp.operator.*
+import org.bouncycastle.openpgp.operator.jcajce.JcaKeyFingerprintCalculator
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPContentSignerBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPContentVerifierBuilderProvider
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPDigestCalculatorProviderBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyPair
+import org.bouncycastle.openpgp.operator.jcajce.JcePBEDataDecryptorFactoryBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcePBEKeyEncryptionMethodGenerator
+import org.bouncycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcePBESecretKeyEncryptorBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcePGPDataEncryptorBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyDataDecryptorFactoryBuilder
+import org.bouncycastle.openpgp.operator.jcajce.JcePublicKeyKeyEncryptionMethodGenerator
+import org.bouncycastle.openpgp.operator.jcajce.JceSessionKeyDataDecryptorFactoryBuilder
+import org.pgpainless.algorithm.HashAlgorithm
+import org.pgpainless.algorithm.PublicKeyAlgorithm
+import org.pgpainless.algorithm.SymmetricKeyAlgorithm
+import org.pgpainless.provider.ProviderFactory
+import org.pgpainless.util.Passphrase
+import java.io.InputStream
+import java.security.KeyPair
+import java.util.*
+
+class JceImplementationFactory : ImplementationFactory() {
+    override val pgpDigestCalculatorProvider: PGPDigestCalculatorProvider =
+            JcaPGPDigestCalculatorProviderBuilder()
+                    .setProvider(ProviderFactory.getProvider())
+                    .build()
+    override val pgpContentVerifierBuilderProvider: PGPContentVerifierBuilderProvider =
+            JcaPGPContentVerifierBuilderProvider()
+                    .setProvider(ProviderFactory.getProvider())
+    override val keyFingerprintCalculator: KeyFingerPrintCalculator =
+            JcaKeyFingerprintCalculator()
+                    .setProvider(ProviderFactory.getProvider())
+
+    override fun getPBESecretKeyEncryptor(symmetricKeyAlgorithm: SymmetricKeyAlgorithm,
+                                          digestCalculator: PGPDigestCalculator,
+                                          passphrase: Passphrase): PBESecretKeyEncryptor =
+            JcePBESecretKeyEncryptorBuilder(symmetricKeyAlgorithm.algorithmId, digestCalculator)
+                    .setProvider(ProviderFactory.getProvider())
+                    .build(passphrase.getChars())
+
+    override fun getPBESecretKeyEncryptor(encryptionAlgorithm: SymmetricKeyAlgorithm,
+                                          hashAlgorithm: HashAlgorithm,
+                                          s2kCount: Int,
+                                          passphrase: Passphrase): PBESecretKeyEncryptor =
+            JcePBESecretKeyEncryptorBuilder(
+                    encryptionAlgorithm.algorithmId,
+                    getPGPDigestCalculator(hashAlgorithm),
+                    s2kCount)
+                    .setProvider(ProviderFactory.getProvider())
+                    .build(passphrase.getChars())
+
+    override fun getPBESecretKeyDecryptor(passphrase: Passphrase): PBESecretKeyDecryptor =
+            JcePBESecretKeyDecryptorBuilder(pgpDigestCalculatorProvider)
+                    .setProvider(ProviderFactory.getProvider())
+                    .build(passphrase.getChars())
+
+    override fun getPGPContentSignerBuilder(keyAlgorithm: Int, hashAlgorithm: Int): PGPContentSignerBuilder =
+            JcaPGPContentSignerBuilder(keyAlgorithm, hashAlgorithm)
+                    .setProvider(ProviderFactory.getProvider())
+
+    override fun getPBEDataDecryptorFactory(passphrase: Passphrase): PBEDataDecryptorFactory =
+            JcePBEDataDecryptorFactoryBuilder(pgpDigestCalculatorProvider)
+                    .setProvider(ProviderFactory.getProvider())
+                    .build(passphrase.getChars())
+
+    override fun getPublicKeyDataDecryptorFactory(privateKey: PGPPrivateKey): PublicKeyDataDecryptorFactory =
+            JcePublicKeyDataDecryptorFactoryBuilder()
+                    .setProvider(ProviderFactory.getProvider())
+                    .build(privateKey)
+
+    override fun getSessionKeyDataDecryptorFactory(sessionKey: PGPSessionKey): SessionKeyDataDecryptorFactory =
+            JceSessionKeyDataDecryptorFactoryBuilder()
+                    .setProvider(ProviderFactory.getProvider())
+                    .build(sessionKey)
+
+    override fun getPublicKeyKeyEncryptionMethodGenerator(key: PGPPublicKey): PublicKeyKeyEncryptionMethodGenerator =
+            JcePublicKeyKeyEncryptionMethodGenerator(key)
+                    .setProvider(ProviderFactory.getProvider())
+
+    override fun getPBEKeyEncryptionMethodGenerator(passphrase: Passphrase): PBEKeyEncryptionMethodGenerator =
+            JcePBEKeyEncryptionMethodGenerator(passphrase.getChars())
+                    .setProvider(ProviderFactory.getProvider())
+
+    override fun getPGPDataEncryptorBuilder(symmetricKeyAlgorithm: Int): PGPDataEncryptorBuilder =
+            JcePGPDataEncryptorBuilder(symmetricKeyAlgorithm)
+                    .setProvider(ProviderFactory.getProvider())
+
+    override fun getPGPKeyPair(publicKeyAlgorithm: PublicKeyAlgorithm, keyPair: KeyPair, creationDate: Date): PGPKeyPair =
+            JcaPGPKeyPair(publicKeyAlgorithm.algorithmId, keyPair, creationDate)
+
+    override fun getPGPObjectFactory(inputStream: InputStream): PGPObjectFactory =
+            PGPObjectFactory(inputStream, keyFingerprintCalculator)
+}
--- a/pgpainless-core/src/test/java/org/pgpainless/signature/builder/ThirdPartyCertificationSignatureBuilderTest.java
+++ b/pgpainless-core/src/test/java/org/pgpainless/signature/builder/ThirdPartyCertificationSignatureBuilderTest.java
@ -68,7 +68,7 @@ public class ThirdPartyCertificationSignatureBuilderTest {
        assertFalse(exportable.isExportable());

        // test sig correctness
-        certification.init(ImplementationFactory.getInstance().getPGPContentVerifierBuilderProvider(), secretKeys.getPublicKey());
+        certification.init(ImplementationFactory.getInstance().getPgpContentVerifierBuilderProvider(), secretKeys.getPublicKey());
        assertTrue(certification.verifyCertification("Bob", bobsPublicKeys.getPublicKey()));
    }
 }