Initial commit

.gitignore

@@ -0,0 +1,14 @@
+.idea
+.gradle
+
+out/
+
+*.iws
+*.iml
+*.ipr
+*.class
+*.log
+*.jar
+
+
+!gradle-wrapper.jar

build.gradle

@@ -0,0 +1,18 @@
+plugins {
+    id 'java'
+}
+
+group 'de.vanitasvitae.crypto'
+version '0.1-SNAPSHOT'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+    compile 'org.bouncycastle:bcprov-jdk15on:1.59'
+    compile 'org.bouncycastle:bcpg-jdk15on:1.59'
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-bin.zip

gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'pgpainless'
+

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

@@ -0,0 +1,5 @@
+package de.vanitasvitae.crypto.pgpainless;
+
+public class EncryptionBuilder {
+
+}

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

@@ -0,0 +1,44 @@
+package de.vanitasvitae.crypto.pgpainless;
+
+import java.io.IOException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.Security;
+import java.util.Base64;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.KeyFlag;
+import de.vanitasvitae.crypto.pgpainless.key.generation.KeySpec;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.DSA;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.RSA_GENERAL;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.PGPSecretKeyRing;
+
+public class Main {
+
+    public static void main(String[] args)
+            throws NoSuchAlgorithmException, PGPException, NoSuchProviderException, IOException {
+        Security.addProvider(new BouncyCastleProvider());
+        PGPSecretKeyRing secretKeys = PGPainless.generateKeyRing()
+                .generateCompositeKeyRing()
+                .withSubKey(
+                        KeySpec.getBuilder()
+                                .ofType(RSA_GENERAL._4096)
+                                .withKeyFlags(KeyFlag.ENCRYPT_COMMS, KeyFlag.ENCRYPT_STORAGE)
+                                .withStandardConfiguration())
+                .done()
+                .withCertificationKeyType(
+                        KeySpec.getBuilder()
+                                .ofType(DSA._3072)
+                                .withKeyFlags(KeyFlag.SIGN_DATA)
+                                .withStandardConfiguration())
+                .withPrimaryUserId("Test123")
+                .done()
+                .withoutPassphrase()
+                .build();
+
+        byte[] base64 = Base64.getEncoder().encode(secretKeys.getEncoded());
+
+        System.out.println(new String(base64));
+    }
+}

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

@@ -0,0 +1,10 @@
+package de.vanitasvitae.crypto.pgpainless;
+
+import de.vanitasvitae.crypto.pgpainless.key.generation.KeyRingBuilder;
+
+public class PGPainless {
+
+    public static KeyRingBuilder generateKeyRing() {
+        return new KeyRingBuilder();
+    }
+}

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

@@ -0,0 +1,8 @@
+package de.vanitasvitae.crypto.pgpainless;
+
+import java.util.Set;
+
+public class PainlessResult {
+    Set<Long> signingKeys;
+    Long decryptingKey;
+}

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

@@ -0,0 +1,93 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import com.sun.istack.internal.NotNull;
+
+public class AlgorithmSuite {
+
+    private static AlgorithmSuite defaultAlgorithmSuite = new AlgorithmSuite(
+            Arrays.asList(
+                    SymmetricKeyAlgorithm.AES_256,
+                    SymmetricKeyAlgorithm.AES_192,
+                    SymmetricKeyAlgorithm.AES_128),
+            Arrays.asList(
+                    HashAlgorithm.SHA512,
+                    HashAlgorithm.SHA384,
+                    HashAlgorithm.SHA256,
+                    HashAlgorithm.SHA224,
+                    HashAlgorithm.SHA1),
+            Arrays.asList(
+                    CompressionAlgorithm.ZLIB,
+                    CompressionAlgorithm.BZIP2,
+                    CompressionAlgorithm.ZIP,
+                    CompressionAlgorithm.UNCOMPRESSED)
+    );
+
+    private List<SymmetricKeyAlgorithm> symmetricKeyAlgorithms;
+    private List<HashAlgorithm> hashAlgorithms;
+    private List<CompressionAlgorithm> compressionAlgorithms;
+
+    public AlgorithmSuite(@NotNull List<SymmetricKeyAlgorithm> symmetricKeyAlgorithms,
+                          @NotNull List<HashAlgorithm> hashAlgorithms,
+                          @NotNull List<CompressionAlgorithm> compressionAlgorithms) {
+        this.symmetricKeyAlgorithms = Collections.unmodifiableList(symmetricKeyAlgorithms);
+        this.hashAlgorithms = Collections.unmodifiableList(hashAlgorithms);
+        this.compressionAlgorithms = Collections.unmodifiableList(compressionAlgorithms);
+    }
+
+    public void setSymmetricKeyAlgorithms(@NotNull List<SymmetricKeyAlgorithm> symmetricKeyAlgorithms) {
+        this.symmetricKeyAlgorithms = symmetricKeyAlgorithms;
+    }
+
+    public List<SymmetricKeyAlgorithm> getSymmetricKeyAlgorithms() {
+        return new ArrayList<>(symmetricKeyAlgorithms);
+    }
+
+    public int[] getSymmetricKeyAlgorithmIds() {
+        int[] array = new int[symmetricKeyAlgorithms.size()];
+        for (int i = 0; i < array.length; i++) {
+            array[i] = symmetricKeyAlgorithms.get(i).getAlgorithmId();
+        }
+        return array;
+    }
+
+    public void setHashAlgorithms(@NotNull List<HashAlgorithm> hashAlgorithms) {
+        this.hashAlgorithms = hashAlgorithms;
+    }
+
+    public List<HashAlgorithm> getHashAlgorithms() {
+        return hashAlgorithms;
+    }
+
+    public int[] getHashAlgorithmIds() {
+        int[] array = new int[hashAlgorithms.size()];
+        for (int i = 0; i < array.length; i++) {
+            array[i] = hashAlgorithms.get(i).getAlgorithmId();
+        }
+        return array;
+    }
+
+    public void setCompressionAlgorithms(@NotNull List<CompressionAlgorithm> compressionAlgorithms) {
+        this.compressionAlgorithms = compressionAlgorithms;
+    }
+
+    public List<CompressionAlgorithm> getCompressionAlgorithms() {
+        return compressionAlgorithms;
+    }
+
+    public int[] getCompressionAlgorithmIds() {
+        int[] array = new int[compressionAlgorithms.size()];
+        for (int i = 0; i < array.length; i++) {
+            array[i] = compressionAlgorithms.get(i).getAlgorithmId();
+        }
+        return array;
+    }
+
+    public static AlgorithmSuite getDefaultAlgorithmSuite() {
+        return defaultAlgorithmSuite;
+    }
+}

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

@@ -0,0 +1,37 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.bouncycastle.bcpg.CompressionAlgorithmTags;
+
+public enum CompressionAlgorithm {
+
+    UNCOMPRESSED(   CompressionAlgorithmTags.UNCOMPRESSED),
+    ZIP(            CompressionAlgorithmTags.ZIP),
+    ZLIB(           CompressionAlgorithmTags.ZLIB),
+    BZIP2(          CompressionAlgorithmTags.BZIP2),
+    ;
+
+    private static final Map<Integer, CompressionAlgorithm> MAP = new HashMap<>();
+
+    static {
+        for (CompressionAlgorithm c : CompressionAlgorithm.values()) {
+            MAP.put(c.algorithmId, c);
+        }
+    }
+
+    public static CompressionAlgorithm fromId(int id) {
+        return MAP.get(id);
+    }
+
+    private final int algorithmId;
+
+    CompressionAlgorithm(int id) {
+        this.algorithmId = id;
+    }
+
+    public int getAlgorithmId() {
+        return algorithmId;
+    }
+}

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

@@ -0,0 +1,33 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.bouncycastle.bcpg.sig.Features;
+
+public enum Feature {
+    MODIFICATION_DETECTION(Features.FEATURE_MODIFICATION_DETECTION),
+    ;
+
+    private static final Map<Byte, Feature> MAP = new HashMap<>();
+
+    static {
+        for (Feature f : Feature.values()) {
+            MAP.put(f.featureId, f);
+        }
+    }
+
+    public static Feature fromId(byte id) {
+        return MAP.get(id);
+    }
+
+    private final byte featureId;
+
+    Feature(byte featureId) {
+        this.featureId = featureId;
+    }
+
+    public byte getFeatureId() {
+        return featureId;
+    }
+}

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

@@ -0,0 +1,44 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.bouncycastle.bcpg.HashAlgorithmTags;
+
+public enum HashAlgorithm {
+
+    MD5(        HashAlgorithmTags.MD5),
+    SHA1(       HashAlgorithmTags.SHA1),
+    RIPEMD160(  HashAlgorithmTags.RIPEMD160),
+    DOUBLE_SHA( HashAlgorithmTags.DOUBLE_SHA),
+    MD2(        HashAlgorithmTags.MD2),
+    TIGER_192(  HashAlgorithmTags.TIGER_192),
+    HAVAL_5_160(HashAlgorithmTags.HAVAL_5_160),
+    SHA256(     HashAlgorithmTags.SHA256),
+    SHA384(     HashAlgorithmTags.SHA384),
+    SHA512(     HashAlgorithmTags.SHA512),
+    SHA224(     HashAlgorithmTags.SHA224),
+    ;
+    //                                                         Coincidence? I don't this so...
+    private static final Map<Integer, HashAlgorithm> MAP = new HashMap<>();
+
+    static {
+        for (HashAlgorithm h : HashAlgorithm.values()) {
+            MAP.put(h.algorithmId, h);
+        }
+    }
+
+    public static HashAlgorithm fromId(int id) {
+        return MAP.get(id);
+    }
+
+    private final int algorithmId;
+
+    HashAlgorithm(int id) {
+        this.algorithmId = id;
+    }
+
+    public int getAlgorithmId() {
+        return algorithmId;
+    }
+}

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

@@ -0,0 +1,25 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import org.bouncycastle.bcpg.sig.KeyFlags;
+
+public enum KeyFlag {
+
+    CERTIFY_OTHER(  KeyFlags.CERTIFY_OTHER),
+    SIGN_DATA(      KeyFlags.SIGN_DATA),
+    ENCRYPT_COMMS(  KeyFlags.ENCRYPT_COMMS),
+    ENCRYPT_STORAGE(KeyFlags.ENCRYPT_STORAGE),
+    SPLIT(          KeyFlags.SPLIT),
+    AUTHENTICATION( KeyFlags.AUTHENTICATION),
+    SHARED(         KeyFlags.SHARED),
+    ;
+
+    private final int flag;
+
+    KeyFlag(int flag) {
+        this.flag = flag;
+    }
+
+    public int getFlag() {
+        return flag;
+    }
+}

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

@@ -0,0 +1,46 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
+
+public enum PublicKeyAlgorithm {
+
+    RSA_GENERAL(    PublicKeyAlgorithmTags.RSA_GENERAL),
+    RSA_ENCRYPT(    PublicKeyAlgorithmTags.RSA_ENCRYPT),
+    RSA_SIGN(       PublicKeyAlgorithmTags.RSA_SIGN),
+    ELGAMAL_ENCRYPT(PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT),
+    DSA(PublicKeyAlgorithmTags.DSA),
+    /**
+     * @deprecated use {@link #ECDH} instead.
+     */
+    EC(             PublicKeyAlgorithmTags.EC),
+    ECDH(           PublicKeyAlgorithmTags.ECDH),
+    ECDSA(          PublicKeyAlgorithmTags.ECDSA),
+    ELGAMAL_GENERAL(PublicKeyAlgorithmTags.ELGAMAL_GENERAL),
+    DIFFIE_HELLMAN( PublicKeyAlgorithmTags.DIFFIE_HELLMAN),
+    ;
+
+    private static final Map<Integer, PublicKeyAlgorithm> MAP = new HashMap<>();
+
+    static {
+        for (PublicKeyAlgorithm p : PublicKeyAlgorithm.values()) {
+            MAP.put(p.algorithmId, p);
+        }
+    }
+
+    public static PublicKeyAlgorithm fromId(int id) {
+        return MAP.get(id);
+    }
+
+    private final int algorithmId;
+
+    PublicKeyAlgorithm(int algorithmId) {
+        this.algorithmId = algorithmId;
+    }
+
+    public int getAlgorithmId() {
+        return algorithmId;
+    }
+}

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

@@ -0,0 +1,47 @@
+package de.vanitasvitae.crypto.pgpainless.key.algorithm;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.bouncycastle.bcpg.SymmetricKeyAlgorithmTags;
+
+public enum SymmetricKeyAlgorithm {
+
+    NULL(           SymmetricKeyAlgorithmTags.NULL),
+    IDEA(           SymmetricKeyAlgorithmTags.IDEA),
+    TRIPLE_DES(     SymmetricKeyAlgorithmTags.TRIPLE_DES),
+    CAST5(          SymmetricKeyAlgorithmTags.CAST5),
+    BLOWFISH(       SymmetricKeyAlgorithmTags.BLOWFISH),
+    SAFER(          SymmetricKeyAlgorithmTags.SAFER),
+    DES(            SymmetricKeyAlgorithmTags.DES),
+    AES_128(        SymmetricKeyAlgorithmTags.AES_128),
+    AES_192(        SymmetricKeyAlgorithmTags.AES_192),
+    AES_256(        SymmetricKeyAlgorithmTags.AES_256),
+    TWOFISH(        SymmetricKeyAlgorithmTags.TWOFISH),
+    CAMELLIA_128(   SymmetricKeyAlgorithmTags.CAMELLIA_128),
+    CAMELLIA_192(   SymmetricKeyAlgorithmTags.CAMELLIA_192),
+    CAMELLIA_256(   SymmetricKeyAlgorithmTags.CAMELLIA_256),
+    ;
+
+    private static final Map<Integer, SymmetricKeyAlgorithm> MAP = new HashMap<>();
+
+    static {
+        for (SymmetricKeyAlgorithm s : SymmetricKeyAlgorithm.values()) {
+            MAP.put(s.algorithmId, s);
+        }
+    }
+
+    public static SymmetricKeyAlgorithm forId(int id) {
+        return MAP.get(id);
+    }
+
+    private final int algorithmId;
+
+    SymmetricKeyAlgorithm(int algorithmId) {
+        this.algorithmId = algorithmId;
+    }
+
+    public int getAlgorithmId() {
+        return algorithmId;
+    }
+}

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

@@ -0,0 +1,213 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation;
+
+
+import java.nio.charset.Charset;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.KeyFlag;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.KeyType;
+import org.bouncycastle.bcpg.HashAlgorithmTags;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.bouncycastle.openpgp.PGPEncryptedData;
+import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.PGPKeyPair;
+import org.bouncycastle.openpgp.PGPKeyRingGenerator;
+import org.bouncycastle.openpgp.PGPSecretKeyRing;
+import org.bouncycastle.openpgp.PGPSignature;
+import org.bouncycastle.openpgp.PGPSignatureSubpacketGenerator;
+import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
+import org.bouncycastle.openpgp.operator.PGPContentSignerBuilder;
+import org.bouncycastle.openpgp.operator.PGPDigestCalculator;
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPContentSignerBuilder;
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPDigestCalculatorProviderBuilder;
+import org.bouncycastle.openpgp.operator.jcajce.JcaPGPKeyPair;
+import org.bouncycastle.openpgp.operator.jcajce.JcePBESecretKeyEncryptorBuilder;
+
+public class KeyRingBuilder implements KeyRingBuilderInterface {
+
+    private final Charset UTF8 = Charset.forName("UTF-8");
+
+    private List<KeySpec> keySpecs = new ArrayList<>();
+    private List<String> userIds = new ArrayList<>();
+    private char[] passphrase;
+
+    @Override
+    public WithSubKeyType generateCompositeKeyRing() {
+        return new WithSubKeyTypeImpl();
+    }
+
+    @Override
+    public WithCertificationKeyType generateSingleKeyKeyRing() {
+        return new WithCertificationKeyTypeImpl();
+    }
+
+    class WithSubKeyTypeImpl implements WithSubKeyType {
+
+        @Override
+        public WithSubKeyType withSubKey(KeySpec type) {
+            KeyRingBuilder.this.keySpecs.add(type);
+            return this;
+        }
+
+        @Override
+        public WithCertificationKeyType done() {
+            return new WithCertificationKeyTypeImpl();
+        }
+    }
+
+    class WithCertificationKeyTypeImpl implements WithCertificationKeyType {
+
+        @Override
+        public WithPrimaryUserId withCertificationKeyType(KeySpec spec) {
+            if ((spec.getKeyFlags() & KeyFlag.CERTIFY_OTHER.getFlag()) == 0) {
+                throw new IllegalArgumentException("Certification Key MUST have KeyFlag CERTIFY_OTHER");
+            }
+            KeyRingBuilder.this.keySpecs.add(spec);
+            return new WithPrimaryUserIdImpl();
+        }
+    }
+
+    class WithPrimaryUserIdImpl implements WithPrimaryUserId {
+
+        @Override
+        public WithAdditionalUserIds withPrimaryUserId(String userId) {
+            KeyRingBuilder.this.userIds.add(userId);
+            return new WithAdditionalUserIdsImpl();
+        }
+
+        @Override
+        public WithAdditionalUserIds withPrimaryUserId(byte[] userId) {
+            return withPrimaryUserId(new String(userId, UTF8));
+        }
+    }
+
+    class WithAdditionalUserIdsImpl implements WithAdditionalUserIds {
+
+        @Deprecated
+        @Override
+        public WithAdditionalUserIds withAdditionalUserId(String userId) {
+            KeyRingBuilder.this.userIds.add(userId);
+            return this;
+        }
+
+        @Deprecated
+        @Override
+        public WithAdditionalUserIds withAdditionalUserId(byte[] userId) {
+            return withAdditionalUserId(new String(userId, UTF8));
+        }
+
+        @Override
+        public WithPassphrase done() {
+            return new WithPassphraseImpl();
+        }
+    }
+
+    class WithPassphraseImpl implements WithPassphrase {
+
+        @Override
+        public Build withPassphrase(String passphrase) {
+            return withPassphrase(passphrase.toCharArray());
+        }
+
+        @Override
+        public Build withPassphrase(char[] passphrase) {
+            KeyRingBuilder.this.passphrase = passphrase;
+            return new BuildImpl();
+        }
+
+        @Override
+        public Build withoutPassphrase() {
+            KeyRingBuilder.this.passphrase = null;
+            return new BuildImpl();
+        }
+
+        class BuildImpl implements Build {
+
+            @Override
+            public PGPSecretKeyRing build() throws NoSuchAlgorithmException, PGPException, NoSuchProviderException {
+
+                // Hash Calculator
+                PGPDigestCalculator calculator = new JcaPGPDigestCalculatorProviderBuilder()
+                        .setProvider(BouncyCastleProvider.PROVIDER_NAME)
+                        .build()
+                        .get(HashAlgorithmTags.SHA1);
+
+                // Encryptor for encrypting secret keys
+                PBESecretKeyEncryptor encryptor = passphrase == null ?
+                        null : // unencrypted key pair, otherwise AES-256 encrypted
+                        new JcePBESecretKeyEncryptorBuilder(PGPEncryptedData.AES_256, calculator)
+                                .setProvider(BouncyCastleProvider.PROVIDER_NAME)
+                                .build(passphrase);
+
+                // First key is the Master Key
+                KeySpec certKeySpec = keySpecs.get(0);
+                KeyType certKeyType = certKeySpec.getKeyType();
+                keySpecs.remove(0); // Remove master key, so that we later only add sub keys.
+
+                // Generate Master Key
+                PGPKeyPair certKey = generateKeyPair(certKeySpec);
+
+                // Signer for creating self-signature
+                PGPContentSignerBuilder signer = new JcaPGPContentSignerBuilder(
+                        certKey.getPublicKey().getAlgorithm(), HashAlgorithmTags.SHA256);
+
+                // Mimic GnuPGs signature sub packets
+                PGPSignatureSubpacketGenerator hashedSubPackets = new PGPSignatureSubpacketGenerator();
+
+                // Key flags
+                hashedSubPackets.setKeyFlags(true, certKeySpec.getKeyFlags());
+
+                // Encryption Algorithms
+                hashedSubPackets.setPreferredSymmetricAlgorithms(true,
+                        certKeySpec.getPreferredAlgorithms().getSymmetricKeyAlgorithmIds());
+
+                // Hash Algorithms
+                hashedSubPackets.setPreferredHashAlgorithms(true,
+                        certKeySpec.getPreferredAlgorithms().getHashAlgorithmIds());
+
+                // Compression Algorithms
+                hashedSubPackets.setPreferredCompressionAlgorithms(true,
+                        certKeySpec.getPreferredAlgorithms().getCompressionAlgorithmIds());
+
+                // Modification Detection
+                hashedSubPackets.setFeature(true, certKeySpec.getFeatures());
+
+                // Generator which the user can get the key pair from
+                PGPKeyRingGenerator ringGenerator = new PGPKeyRingGenerator(
+                        PGPSignature.POSITIVE_CERTIFICATION, certKey,
+                        userIds.get(0), calculator,
+                        hashedSubPackets.generate(), null, signer, encryptor);
+
+                for (KeySpec subKeySpec : keySpecs) {
+                    PGPKeyPair subKey = generateKeyPair(subKeySpec);
+                    ringGenerator.addSubKey(subKey);
+                }
+
+                return ringGenerator.generateSecretKeyRing();
+            }
+
+            private PGPKeyPair generateKeyPair(KeySpec spec)
+                    throws NoSuchProviderException, NoSuchAlgorithmException, PGPException {
+                KeyType type = spec.getKeyType();
+                KeyPairGenerator certKeyGenerator = KeyPairGenerator.getInstance(
+                        type.getName(), BouncyCastleProvider.PROVIDER_NAME);
+                certKeyGenerator.initialize(type.getLength());
+
+                // Create raw Key Pair
+                KeyPair rawKeyPair = certKeyGenerator.generateKeyPair();
+
+                // Form PGP key pair
+                PGPKeyPair pgpKeyPair = new JcaPGPKeyPair(type.getAlgorithm().getAlgorithmId(),
+                        rawKeyPair, new Date());
+
+                return pgpKeyPair;
+            }
+        }
+    }
+}

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

@@ -0,0 +1,58 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+
+import org.bouncycastle.openpgp.PGPException;
+import org.bouncycastle.openpgp.PGPSecretKeyRing;
+
+public interface KeyRingBuilderInterface {
+
+    WithSubKeyType generateCompositeKeyRing();
+
+    WithCertificationKeyType generateSingleKeyKeyRing();
+
+    interface WithSubKeyType {
+
+        WithSubKeyType withSubKey(KeySpec keySpec);
+
+        WithCertificationKeyType done();
+    }
+
+    interface WithCertificationKeyType {
+        WithPrimaryUserId withCertificationKeyType(KeySpec keySpec);
+    }
+
+    interface WithPrimaryUserId {
+
+        WithAdditionalUserIds withPrimaryUserId(String userId);
+
+        WithAdditionalUserIds withPrimaryUserId(byte[] userId);
+
+    }
+
+    interface WithAdditionalUserIds {
+
+        WithAdditionalUserIds withAdditionalUserId(String userId);
+
+        WithAdditionalUserIds withAdditionalUserId(byte[] userId);
+
+        WithPassphrase done();
+
+    }
+
+    interface WithPassphrase {
+
+        Build withPassphrase(String passphrase);
+
+        Build withPassphrase(char[] passphrase);
+
+        Build withoutPassphrase();
+    }
+
+    interface Build {
+
+        PGPSecretKeyRing build() throws NoSuchAlgorithmException, PGPException, NoSuchProviderException;
+
+    }
+}

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

@@ -0,0 +1,49 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation;
+
+import java.util.Set;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.AlgorithmSuite;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.Feature;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.KeyType;
+
+public class KeySpec {
+
+    private final KeyType keyType;
+    private final int keyFlags;
+    private final AlgorithmSuite algorithmSuite;
+    private final Set<Feature> features;
+
+    KeySpec(KeyType type,
+                   int keyFlags,
+                   AlgorithmSuite preferredAlgorithms,
+                   Set<Feature> features) {
+        this.keyType = type;
+        this.keyFlags = keyFlags;
+        this.algorithmSuite = preferredAlgorithms;
+        this.features = features;
+    }
+
+    KeyType getKeyType() {
+        return keyType;
+    }
+
+    int getKeyFlags() {
+        return keyFlags;
+    }
+
+    AlgorithmSuite getPreferredAlgorithms() {
+        return algorithmSuite;
+    }
+
+    byte getFeatures() {
+        byte val = 0;
+        for (Feature f : features) {
+            val |= f.getFeatureId();
+        }
+        return val;
+    }
+
+    public static KeySpecBuilder getBuilder() {
+        return new KeySpecBuilder();
+    }
+}

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

@@ -0,0 +1,140 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.AlgorithmSuite;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.CompressionAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.Feature;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.HashAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.KeyFlag;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.SymmetricKeyAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.KeyType;
+
+public class KeySpecBuilder implements KeySpecBuilderInterface {
+
+    private KeyType type;
+    private int keyFlags;
+    private AlgorithmSuite algorithmSuite = AlgorithmSuite.getDefaultAlgorithmSuite();
+    private Set<Feature> features = new HashSet<>();
+
+    @Override
+    public WithKeyFlags ofType(KeyType type) {
+        KeySpecBuilder.this.type = type;
+        return new WithKeyFlagsImpl();
+    }
+
+    class WithKeyFlagsImpl implements WithKeyFlags {
+
+        @Override
+        public WithDetailedConfiguration withKeyFlags(KeyFlag... flags) {
+            int val = 0;
+            for (KeyFlag f : flags) {
+                val |= f.getFlag();
+            }
+            KeySpecBuilder.this.keyFlags = val;
+            return new WithDetailedConfigurationImpl();
+        }
+
+        @Override
+        public WithDetailedConfiguration withDefaultKeyFlags() {
+            return withKeyFlags(
+                    KeyFlag.CERTIFY_OTHER,
+                    KeyFlag.SIGN_DATA,
+                    KeyFlag.ENCRYPT_COMMS,
+                    KeyFlag.ENCRYPT_STORAGE,
+                    KeyFlag.AUTHENTICATION);
+        }
+    }
+
+    class WithDetailedConfigurationImpl implements WithDetailedConfiguration {
+
+        @Deprecated
+        @Override
+        public WithPreferredSymmetricAlgorithms withDetailedConfiguration() {
+            return new WithPreferredSymmetricAlgorithmsImpl();
+        }
+
+        @Override
+        public KeySpec withStandardConfiguration() {
+            return new KeySpec(
+                    KeySpecBuilder.this.type,
+                    KeySpecBuilder.this.keyFlags,
+                    KeySpecBuilder.this.algorithmSuite,
+                    KeySpecBuilder.this.features);
+        }
+    }
+
+    class WithPreferredSymmetricAlgorithmsImpl implements WithPreferredSymmetricAlgorithms {
+
+        @Override
+        public WithPreferredHashAlgorithms withPreferredSymmetricAlgorithms(SymmetricKeyAlgorithm... algorithms) {
+            KeySpecBuilder.this.algorithmSuite.setSymmetricKeyAlgorithms(Arrays.asList(algorithms));
+            return new WithPreferredHashAlgorithmsImpl();
+        }
+
+        @Override
+        public WithPreferredHashAlgorithms withDefaultSymmetricAlgorithms() {
+            KeySpecBuilder.this.algorithmSuite.setSymmetricKeyAlgorithms(
+                    AlgorithmSuite.getDefaultAlgorithmSuite().getSymmetricKeyAlgorithms());
+            return new WithPreferredHashAlgorithmsImpl();
+        }
+
+        @Override
+        public WithFeatures withDefaultAlgorithms() {
+            KeySpecBuilder.this.algorithmSuite = AlgorithmSuite.getDefaultAlgorithmSuite();
+            return new WithFeaturesImpl();
+        }
+    }
+
+    class WithPreferredHashAlgorithmsImpl implements WithPreferredHashAlgorithms {
+
+        @Override
+        public WithPreferredCompressionAlgorithms withPreferredHashAlgorithms(HashAlgorithm... algorithms) {
+            KeySpecBuilder.this.algorithmSuite.setHashAlgorithms(Arrays.asList(algorithms));
+            return new WithPreferredCompressionAlgorithmsImpl();
+        }
+
+        @Override
+        public WithPreferredCompressionAlgorithms withDefaultHashAlgorithms() {
+            KeySpecBuilder.this.algorithmSuite.setHashAlgorithms(
+                    AlgorithmSuite.getDefaultAlgorithmSuite().getHashAlgorithms());
+            return new WithPreferredCompressionAlgorithmsImpl();
+        }
+    }
+
+    class WithPreferredCompressionAlgorithmsImpl implements WithPreferredCompressionAlgorithms {
+
+        @Override
+        public WithFeatures withPreferredCompressionAlgorithms(CompressionAlgorithm... algorithms) {
+            KeySpecBuilder.this.algorithmSuite.setCompressionAlgorithms(Arrays.asList(algorithms));
+            return new WithFeaturesImpl();
+        }
+
+        @Override
+        public WithFeatures withDefaultCompressionAlgorithms() {
+            KeySpecBuilder.this.algorithmSuite.setCompressionAlgorithms(
+                    AlgorithmSuite.getDefaultAlgorithmSuite().getCompressionAlgorithms());
+            return new WithFeaturesImpl();
+        }
+    }
+
+    class WithFeaturesImpl implements WithFeatures {
+
+        @Override
+        public WithFeatures withFeature(Feature feature) {
+            KeySpecBuilder.this.features.add(feature);
+            return this;
+        }
+
+        @Override
+        public KeySpec done() {
+            return new KeySpec(
+                    KeySpecBuilder.this.type,
+                    KeySpecBuilder.this.keyFlags,
+                    KeySpecBuilder.this.algorithmSuite,
+                    KeySpecBuilder.this.features);
+        }
+    }
+}

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

@@ -0,0 +1,62 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.AlgorithmSuite;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.CompressionAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.Feature;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.HashAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.KeyFlag;
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.SymmetricKeyAlgorithm;
+import de.vanitasvitae.crypto.pgpainless.key.generation.type.KeyType;
+
+public interface KeySpecBuilderInterface {
+
+    WithKeyFlags ofType(KeyType type);
+
+    interface WithKeyFlags {
+
+        WithDetailedConfiguration withKeyFlags(KeyFlag... flags);
+
+        WithDetailedConfiguration withDefaultKeyFlags();
+    }
+
+    interface WithDetailedConfiguration {
+
+        WithPreferredSymmetricAlgorithms withDetailedConfiguration();
+
+        KeySpec withStandardConfiguration();
+    }
+
+    interface WithPreferredSymmetricAlgorithms {
+
+        WithPreferredHashAlgorithms withPreferredSymmetricAlgorithms(SymmetricKeyAlgorithm... algorithms);
+
+        WithPreferredHashAlgorithms withDefaultSymmetricAlgorithms();
+
+        WithFeatures withDefaultAlgorithms();
+
+    }
+
+    interface WithPreferredHashAlgorithms {
+
+        WithPreferredCompressionAlgorithms withPreferredHashAlgorithms(HashAlgorithm... algorithms);
+
+        WithPreferredCompressionAlgorithms withDefaultHashAlgorithms();
+
+    }
+
+    interface WithPreferredCompressionAlgorithms {
+
+        WithFeatures withPreferredCompressionAlgorithms(CompressionAlgorithm... algorithms);
+
+        WithFeatures withDefaultCompressionAlgorithms();
+
+    }
+
+    interface WithFeatures {
+
+        WithFeatures withFeature(Feature feature);
+
+        KeySpec done();
+    }
+
+}

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

@@ -0,0 +1,36 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation.type;
+
+import java.security.KeyPairGenerator;
+import java.security.NoSuchAlgorithmException;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.PublicKeyAlgorithm;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+
+public enum DSA implements KeyType {
+
+    _1024(1024),
+    _2048(2048),
+    _3072(3072),
+    ;
+
+    private final int length;
+
+    DSA(int length) {
+        this.length = length;
+    }
+
+    @Override
+    public int getLength() {
+        return length;
+    }
+
+    @Override
+    public String getName() {
+        return "DSA";
+    }
+
+    @Override
+    public PublicKeyAlgorithm getAlgorithm() {
+        return PublicKeyAlgorithm.DSA;
+    }
+}

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

@@ -0,0 +1,32 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation.type;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.PublicKeyAlgorithm;
+
+public enum ElGamal_ENCRYPT implements KeyType {
+
+    _1024(1024),
+    _2048(2048),
+    _3072(3072),
+    ;
+
+    private final int length;
+
+    ElGamal_ENCRYPT(int length) {
+        this.length = length;
+    }
+
+    @Override
+    public int getLength() {
+        return length;
+    }
+
+    @Override
+    public String getName() {
+        return "ElGamal";
+    }
+
+    @Override
+    public PublicKeyAlgorithm getAlgorithm() {
+        return PublicKeyAlgorithm.ELGAMAL_ENCRYPT;
+    }
+}

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

@@ -0,0 +1,12 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation.type;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.PublicKeyAlgorithm;
+
+public interface KeyType {
+
+    int getLength();
+
+    String getName();
+
+    PublicKeyAlgorithm getAlgorithm();
+}

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

@@ -0,0 +1,36 @@
+package de.vanitasvitae.crypto.pgpainless.key.generation.type;
+
+import de.vanitasvitae.crypto.pgpainless.key.algorithm.PublicKeyAlgorithm;
+
+public enum RSA_GENERAL implements KeyType {
+
+    @Deprecated
+    _1024(1024),
+    @Deprecated
+    _2048(2048),
+    _3072(3072),
+    _4096(4096),
+    _8192(8192),
+    ;
+
+    private final int length;
+
+    RSA_GENERAL(int length) {
+        this.length = length;
+    }
+
+    @Override
+    public int getLength() {
+        return length;
+    }
+
+    @Override
+    public String getName() {
+        return "RSA";
+    }
+
+    @Override
+    public PublicKeyAlgorithm getAlgorithm() {
+        return PublicKeyAlgorithm.RSA_GENERAL;
+    }
+}