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README.md
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README.md
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PGPainless - Use OpenPGP Painlessly!
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====================================
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# PGPainless - Use OpenPGP Painlessly!
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[](https://travis-ci.com/pgpainless/pgpainless)
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[](https://github.com/pgpainless/pgpainless/tags)
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[](https://coveralls.io/github/pgpainless/pgpainless?branch=master)
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[](https://pgpainless.org/releases/latest/javadoc/)
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[](https://tests.sequoia-pgp.org/)
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[](https://tests.sequoia-pgp.org/)
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About
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-----
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## About
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PGPainless aims to make using OpenPGP in Java projects as simple as possible.
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It does so by introducing an intuitive Builder structure, which allows easy
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setup of encryptionOptions / decrytion operations, as well as straight forward key generation.
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setup of encryptionOptions / decryption operations, as well as straight forward key generation.
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PGPainless is based around the Bouncycastle java library and can be used on Android down to API level 10.
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It can be configured to either use the Java Cryptographic Engine (JCE), or Bouncycastles lightweight reimplementation.
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### NOTE: PGPainless is in an early state of development. There may be dragons!
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While signature verification in Bouncycastle is limited to signature correctness, PGPainless goes much further.
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It also checks if signing subkeys are properly bound to their primary key, if keys are expired or revoked, as well as
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if keys are allowed to create signatures in the first place.
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These rigorous checks make PGPainless stand out from other Java-based OpenPGP libraries and are the reason why
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PGPainless currently [*scores second place* on Sequoia-PGPs Interoperability Test-Suite](tests.sequoia-pgp.org).
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## Features
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Most of PGPainless' features can be accessed directly from the `PGPainless` class.
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If you want to get started, this class is your friend :)
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For further details you should check out the [javadoc](https://pgpainless.org/releases/latest/javadoc/)!
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### Easily Generate Keys
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PGPainless comes with a simple to use `KeyRingBuilder` class that helps you to quickly generate modern OpenPGP keys.
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There are some predefined key archetypes, but it is possible to fully customize key generation to your needs.
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```java
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// RSA key without additional subkeys
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PGPSecretKeyRing secretKeys = PGPainless.generateKeyRing()
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.simpleRsaKeyRing("Juliet <juliet@montague.lit>", RsaLength._4096);
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// EdDSA primary key with EdDSA signing- and XDH encryption subkeys
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PGPSecretKeyRing secretKeys = PGPainless.generateKeyRing()
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.modernKeyRing("Romeo <romeo@montague.lit>", "I defy you, stars!");
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// Customized key
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PGPSecretKeyRing keyRing = PGPainless.generateKeyRing()
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.withSubKey(
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KeySpec.getBuilder(ECDSA.fromCurve(EllipticCurve._P256))
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.withKeyFlags(KeyFlag.SIGN_DATA)
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.withDetailedConfiguration()
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.withDefaultSymmetricAlgorithms()
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.withDefaultHashAlgorithms()
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.withPreferredCompressionAlgorithms(CompressionAlgorithm.ZLIB)
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.withFeature(Feature.MODIFICATION_DETECTION)
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.done()
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).withSubKey(
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KeySpec.getBuilder(ECDH.fromCurve(EllipticCurve._P256))
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.withKeyFlags(KeyFlag.ENCRYPT_COMMS, KeyFlag.ENCRYPT_STORAGE)
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.withDefaultAlgorithms()
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).withMasterKey(
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KeySpec.getBuilder(RSA.withLength(RsaLength._8192))
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.withKeyFlags(KeyFlag.SIGN_DATA, KeyFlag.CERTIFY_OTHER)
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.withDefaultAlgorithms()
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).withPrimaryUserId("Juliet <juliet@montague.lit>")
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.withAdditionalUserId("xmpp:juliet@capulet.lit")
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.withPassphrase("romeo_oh_Romeo<3")
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.build();
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```
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### Encrypt and Sign Data
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PGPainless makes it easy and painless to encrypt and/or sign data.
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Passed in keys are automatically evaluated, so that you don't accidentally encrypt to revoked or expired keys.
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PGPainless will furthermore detect which algorithms are supported by recipient keys and will negotiate
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algorithms accordingly.
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Still it allows you to manually specify which algorithms to use of course.
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```java
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EncryptionStream encryptionStream = PGPainless.encryptAndOrSign()
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.onOutputStream(outputStream)
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.withOptions(
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ProducerOptions.signAndEncrypt(
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new EncryptionOptions()
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.addRecipient(aliceKey)
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.addRecipient(bobsKey)
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// optionally encrypt to a passphrase
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.addPassphrase(Passphrase.fromPassword("password123"))
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// optionally override symmetric encryption algorithm
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.overrideEncryptionAlgorithm(SymmetricKeyAlgorithm.AES_192),
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new SigningOptions()
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// Sign in-line (using one-pass-signature packet)
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.addInlineSignature(secretKeyDecryptor, aliceSecKey, signatureType)
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// Sign using a detached signature
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.addDetachedSignature(secretKeyDecryptor, aliceSecKey, signatureType)
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// optionally override hash algorithm
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.overrideHashAlgorithm(HashAlgorithm.SHA256)
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).setAsciiArmor(true) // Ascii armor or not
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);
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Streams.pipeAll(plaintextInputStream, encryptionStream);
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encryptionStream.close();
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```
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### Decrypt and Verify Signatures
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Decrypting data and verifying signatures is being done in a similar fashion.
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PGPainless will not only verify *correctness* of signatures, but also if the signing key was allowed to create the signature.
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A key might not be allowed to create signatures if, for example, it expired or was revoked, or was not properly bound to the key ring.
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Furthermore PGPainless will reject signatures made using weak algorithms like SHA-1.
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This behaviour can be modified though using the `Policy` class.
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```java
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DecryptionStream decryptionStream = PGPainless.decryptAndOrVerify()
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.onInputStream(encryptedInputStream)
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.decryptWith(secretKeyProtector, bobSecKeys)
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.verifyWith(alicePubKeys)
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.ignoreMissingPublicKeys()
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.build();
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Streams.pipeAll(decryptionStream, outputStream);
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decryptionStream.close();
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// Result contains information like signature status etc.
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OpenPgpMetadata metadata = decryptionStream.getResult();
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```
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*After* the `DecryptionStream` was closed, you can get metadata about the processed data by retrieving the `OpenPgpMetadata`.
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Again, this object will contain information about how the message was encrypted, who signed it and so on.
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## Include PGPainless in your Project
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@ -29,111 +137,10 @@ repositories {
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}
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dependencies {
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implementation 'org.pgpainless:pgpainless-core:0.1.0'
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implementation 'org.pgpainless:pgpainless-core:0.2.0-alpha12'
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}
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```
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## How to use PGPainless
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The entry point to the API is the `PGPainless` class. Here you can find methods for a quick start :)
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### Generate Keys
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The first thing you probably want to do is generate you some nice tasty Key Pairs. The most straight forward way to do so is by calling
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```java
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PGPKeyRing keyRing = PGPainless.generateKeyRing()
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.simpleRsaKeyRing("Juliet <juliet@montague.lit>", RsaLength._4096);
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```
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but feel free to explore the API further. PGPainless allows you to create Key Pairs consisting of a master key plus several sub keys, even with different algorithms at the same time!
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Take for example a look at this delicious key:
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```java
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PGPSecretKeyRing keyRing = PGPainless.generateKeyRing()
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.withSubKey(
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KeySpec.getBuilder(ECDSA.fromCurve(EllipticCurve._P256))
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.withKeyFlags(KeyFlag.SIGN_DATA)
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.withDetailedConfiguration()
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.withDefaultSymmetricAlgorithms()
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.withDefaultHashAlgorithms()
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.withPreferredCompressionAlgorithms(CompressionAlgorithm.ZLIB)
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.withFeature(Feature.MODIFICATION_DETECTION)
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.done())
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.withSubKey(
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KeySpec.getBuilder(ECDH.fromCurve(EllipticCurve._P256))
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.withKeyFlags(KeyFlag.ENCRYPT_COMMS, KeyFlag.ENCRYPT_STORAGE)
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.withDefaultAlgorithms())
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.withMasterKey(
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KeySpec.getBuilder(RSA.withLength(RsaLength._8192))
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.withKeyFlags(KeyFlag.SIGN_DATA, KeyFlag.CERTIFY_OTHER)
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.withDefaultAlgorithms())
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.withPrimaryUserId("Juliet <juliet@montague.lit>")
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.withPassphrase("romeo_oh_Romeo<3")
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.build();
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```
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### Encrypt / Sign Data
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Encrypting and signingOptions data is pretty straight forward as well.
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```java
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EncryptionStream encryptor = PGPainless.encryptAndOrSign()
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.onOutputStream(targetOuputStream)
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.toRecipients(publicKeyRings)
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.usingSecureAlgorithms()
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.signWith(secretKeyDecryptor, signingKeyRing)
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.noArmor();
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```
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Note: Despite the name, the `EncryptionStream` can be used to sign only as well. Simply replace the `.toRecipients()` option with `doNotEncrypt()`.
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The resulting `EncryptionStream` can then be used to encrypt data like follows:
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```java
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Streams.pipeAll(sourceInputStream, encryptor);
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sourceInputStream.close();
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encryptor.close();
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```
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The encrypted data will be written to the provided `targetOutputStream`.
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Additionally you can get information about the encrypted data by calling
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```java
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OpenPgpMetadata result = encryptor.getResult();
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```
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This object will contain information like to which keys the message is encrypted, which keys were used for signingOptions and so on.
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### Decrypt / Verify Encrypted Data
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To process incoming encrypted / signed data, just do the following:
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```java
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DecryptionStream decryptor = PGPainless.decryptAndOrVerify()
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.onInputStream(sourceInputStream) // insert encrypted data here
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.decryptWith(secretKeyDecryptor, secretKey)
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.verifyWith(trustedKeyIds, senderKeys)
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.ignoreMissingPublicKeys()
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.build();
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```
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Again, the resulting `DecryptionStream` can be used like a normal stream.
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```java
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Streams.pipeAll(decryptor, targetOutputStream);
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decryptor.close();
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```
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*After* the `DecryptionStream` was closed, you can get metadata about the processed data by retrieving the `OpenPgpMetadata`.
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Again, this object will contain information about how the message was encrypted, who signed it and so on.
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```java
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OpenPgpMetadata result = decryptor.getResult();
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```
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For further details you should check out the [javadoc](https://pgpainless.org/releases/latest/javadoc/)!
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## About
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PGPainless is a by-product of my [Summer of Code 2018 project](https://blog.jabberhead.tk/summer-of-code-2018/).
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For that project I was in need of a simple to use OpenPGP library.
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