GordianKnot Asymmetric Encryptors

Overview

Encryptors are supported via the GordianEncryptorFactory interface.

Algorithms are represented by GordianEncryptorSpec. A GordianEncryptor is obtained via the encryptorSpec, and then messages are encrypted/decrypted by the encryptor.

Sample

/* Access factory */
final GordianFactory myBaseFactory = GordianGenerator.createFactory();
final GordianKeyPairFactory myKeyPairFactory = myBase.getKeyPairFactory();
final GordianEncryptorFactory myEncryptorFactory = myKeyPairFactory.getEncryptorFactory();

/* Access keyPairGenerator */
final GordianKeyPairSpec mySpec = GordianKeyPairSpecBuilder.rsa(GordianRSAModulus.MOD2048);
final GordianKeyPairGenerator myGenerator = myKeyPairFactory.getKeyPairGenerator(mySpec);
final GordianKeyPair myPair = myGenerator.generateKeyPair();

/* Access encryptor */
final GordianEncryptorSpec myEncryptSpec = GordianEncryptorSpecBuilder.rsa(GordianDigestSpec.sha2(GordianLength.LEN_256));
final GordianEncryptor myEncryptor = myEncryptorFactory.createEncryptor(myEncryptSpec);

/* Encrypt message */
final byte[] message = ....;
myEncryptor.initForEncrypt(myPair);
final byte[] myEncrypted = myEncryptor.encrypt(myMessage);

/* Decrypt message */
myEncryptor.initForDecrypt(myPair);
final byte[] myResult = myEncryptor.decrypt(myEncrypted);
                

Composite Encryptors

Composite encryptions may be created by a composite keyPair, as long as each element of the composite keyPair is assigned a valid encryptorSpec.

Sample

/* Access factory */
final GordianFactory myBaseFactory = GordianGenerator.createFactory();
final GordianKeyPairFactory myKeyPairFactory = myBase.getKeyPairFactory();
final GordianEncryptorFactory myEncryptorFactory = myKeyPairFactory.getEncryptorFactory();

/* Access keyPairGenerator */
final GordianKeyPairSpec mySpec = GordianKeyPairSpecBuilder.composite(GordianKeyPairSpecBuilder.rsa(GordianRSAModulus.MOD2048),
                                                                      GordianKeyPairSpecBuilder.elGamal(GordianDHGroup.rfc7919_ffdhe2048));
final GordianKeyPairGenerator myGenerator = myKeyPairFactory.getKeyPairGenerator(mySpec);
final GordianKeyPair myPair = myGenerator.generateKeyPair();

/* Access encryptor */
final GordianEncryptorSpec myEncryptSpec = GordianEncryptorSpecBuilder.composite(GordianEncryptorSpecBuilder.rsa(GordianDigestSpec.sha2(GordianLength.LEN_256)),
                                                                                 GordianEncryptorSpecBuilder.elGamal(GordianDigestSpec.sha2(GordianLength.LEN_256)));
final GordianEncryptor myEncryptor = myEncryptorFactory.createEncryptor(myEncryptSpec);

/* Encrypt message */
final byte[] message = ....;
myEncryptor.initForEncrypt(myPair);
final byte[] myEncrypted = myEncryptor.encrypt(myMessage);

/* Decrypt message */
myEncryptor.initForDecrypt(myPair);
final byte[] myResult = myEncryptor.decrypt(myEncrypted);
                    

Algorithms

The following encryptor algorithms are supported