info.pppc.base.security

Interface IPublicKey

All Known Subinterfaces:

ISymEncryptionKey, ISymmetricKey, ISymSigningKey

All Known Implementing Classes:

AESSymmetricKey, ECCPublicKey, HMACSymmetricKey, RSAPublicKey

public interface IPublicKey

Describes a general structure for public keys. These are used for verification of signatures (which are normally used for message authentication & integrity) and for the creation of encrypted messages, which can only be read by the owner of the corresponding private key.

Author:

WA

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	encryptMessage(byte[] input) Encrypts a message with this public key.
boolean	equals(java.lang.Object obj) Every public key has to implement a comparison operator.
boolean	verifySignature(byte[] message, byte[] signature) Use this public key to verify a signature.

Method Detail

verifySignature

boolean verifySignature(byte[] message,
                      byte[] signature)

Use this public key to verify a signature.

Parameters:

message - The message which was signed

signature - The signature of this message

Returns:

True, if the signature is valid, false otherwise

encryptMessage

byte[] encryptMessage(byte[] input)
                      throws java.io.IOException

Encrypts a message with this public key. The encryption could include a header in the returned message, to use hybrid encryption mechanisms.
A message will be encrypted using both asymmetric and symmetric encryption, if the message size exceeds the block size of the asymmetric encryption.
If this is a symmetric key, then always symmetric encryption is used.

Parameters:

input - The message which should be encrypted

Returns:

The encrypted message, maybe containing a header, as described above

Throws:

java.io.IOException - If not enough memory is available or if a key could not be read, this exception occurs

equals

boolean equals(java.lang.Object obj)

Every public key has to implement a comparison operator. Usually an public key equals another one, if the key is identical. This method must returns true, if the public keys equal each other.

Overrides:

equals in class java.lang.Object

Parameters:

obj - The object of the type AbstractCertificate that should be compared to the current public key

Returns:

True, if the current public key and the given public key are equal, false otherwise

See Also:

Object.equals(java.lang.Object)