com.jgcomptech.tools

Class SecurityTools.RSAHashes

java.lang.Object

com.jgcomptech.tools.SecurityTools.RSAHashes

Enclosing class:

SecurityTools

public static final class SecurityTools.RSAHashes
extends Object

Contains methods dealing with RSA encryption and decryption.

Method Summary

Modifier and Type	Method and Description
static byte[]	decrypt(PrivateKey key, byte[] cipherText) Decrypts specified text with private key.
static byte[]	decryptFromString(PrivateKey key, String cipherText) Decrypts specified text with private key.
static byte[]	encrypt(PublicKey key, String plainText) Encrypts specified text with public key.
static String	encryptToString(PublicKey key, String plainText) Encrypts specified text with public key.
static KeyPair	generateKeyPair() Generates a key pair.
static KeyPair	generateKeyPair(boolean saveToFiles, String fileName) Generates a key pair and saves them to files matching the specified filename.
static PrivateKey	readPrivateKeyFromBytes(byte[] bytes) Converts a byte array to a PrivateKey object.
static PublicKey	readPublicKeyFromBytes(byte[] bytes) Converts a byte array to a PublicKey object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

generateKeyPair

public static KeyPair generateKeyPair()
                               throws IOException,
                                      GeneralSecurityException

Generates a key pair.

Returns:

Key pair as a KeyPair object

Throws:

FileNotFoundException - if the file is a directory rather than a regular file, or for some other reason cannot be opened for writing

IOException - if an I/O error occurs

GeneralSecurityException - if error occurs

generateKeyPair

public static KeyPair generateKeyPair(boolean saveToFiles,
                                      String fileName)
                               throws IOException,
                                      GeneralSecurityException

Generates a key pair and saves them to files matching the specified filename.

Parameters:

saveToFiles - If true KeyPair will be saved to two separate files

fileName - File name to use to save files

Returns:

Key pair as a KeyPair object

Throws:

FileNotFoundException - if the file is a directory rather than a regular file, or for some other reason cannot be opened for writing

IOException - if an I/O error occurs

GeneralSecurityException - if error occurs

readPublicKeyFromBytes

public static PublicKey readPublicKeyFromBytes(byte[] bytes)
                                        throws GeneralSecurityException

Converts a byte array to a PublicKey object.

Parameters:

bytes - To read from

Returns:

Converted public key as PublicKey object

Throws:

GeneralSecurityException - if error occurs

readPrivateKeyFromBytes

public static PrivateKey readPrivateKeyFromBytes(byte[] bytes)
                                          throws GeneralSecurityException

Converts a byte array to a PrivateKey object.

Parameters:

bytes - To read from

Returns:

Converted public key as PrivateKey object

Throws:

GeneralSecurityException - if error occurs

encrypt

public static byte[] encrypt(PublicKey key,
                             String plainText)
                      throws GeneralSecurityException

Encrypts specified text with public key.

Parameters:

key - Public key to encrypt with

plainText - String to encrypt

Returns:

Encrypted text as byte array

Throws:

GeneralSecurityException - if error occurs

encryptToString

public static String encryptToString(PublicKey key,
                                     String plainText)
                              throws GeneralSecurityException

Encrypts specified text with public key.

Parameters:

key - Public key to encrypt with

plainText - String to encrypt

Returns:

Encrypted text as string

Throws:

GeneralSecurityException - if error occurs

decrypt

public static byte[] decrypt(PrivateKey key,
                             byte[] cipherText)
                      throws GeneralSecurityException

Decrypts specified text with private key.

Parameters:

key - Private key to decrypt with

cipherText - String to decrypt

Returns:

Decrypted text as byte array

Throws:

GeneralSecurityException - if error occurs

decryptFromString

public static byte[] decryptFromString(PrivateKey key,
                                       String cipherText)
                                throws GeneralSecurityException

Decrypts specified text with private key.

Parameters:

key - Private key to decrypt with

cipherText - String to decrypt

Returns:

Decrypted text as string

Throws:

GeneralSecurityException - if error occurs