io.jsondb.crypto

Class CryptoUtil

java.lang.Object

io.jsondb.crypto.CryptoUtil

public class CryptoUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
CryptoUtil()

Method Summary

Modifier and Type	Method and Description
static void	decryptFields(java.lang.Object object, CollectionMetaData cmd, ICipher cipher) A utility method to decrypt the value of field marked by the @Secret annotation using its setter/mutator method.
static void	encryptFields(java.lang.Object object, CollectionMetaData cmd, ICipher cipher) A utility method to encrypt the value of field marked by the @Secret annotation using its setter/mutator method.
static java.lang.String	generate128BitKey(java.lang.String password, java.lang.String salt) Utility method to help generate a strong 128 bit Key to be used for the DefaultAESCBCCipher.

Methods inherited from class java.lang.Object

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

Constructor Detail

CryptoUtil

public CryptoUtil()

Method Detail

encryptFields

public static void encryptFields(java.lang.Object object,
                                 CollectionMetaData cmd,
                                 ICipher cipher)
                          throws java.lang.IllegalAccessException,
                                 java.lang.IllegalArgumentException,
                                 java.lang.reflect.InvocationTargetException

A utility method to encrypt the value of field marked by the @Secret annotation using its setter/mutator method.

Parameters:

object - the actual Object representing the POJO we want the Id of.

cmd - the CollectionMetaData object from which we can obtain the list containing names of fields which have the @Secret annotation

cipher - the actual cipher implementation to use

Throws:

java.lang.IllegalAccessException - Error when invoking method for a @Secret annotated field due to permissions

java.lang.IllegalArgumentException - Error when invoking method for a @Secret annotated field due to wrong arguments

java.lang.reflect.InvocationTargetException - Error when invoking method for a @Secret annotated field, the method threw a exception

decryptFields

public static void decryptFields(java.lang.Object object,
                                 CollectionMetaData cmd,
                                 ICipher cipher)
                          throws java.lang.IllegalAccessException,
                                 java.lang.IllegalArgumentException,
                                 java.lang.reflect.InvocationTargetException

A utility method to decrypt the value of field marked by the @Secret annotation using its setter/mutator method.

Parameters:

object - the actual Object representing the POJO we want the Id of.

cmd - the CollectionMetaData object from which we can obtain the list containing names of fields which have the @Secret annotation

cipher - the actual cipher implementation to use

Throws:

java.lang.IllegalAccessException - Error when invoking method for a @Secret annotated field due to permissions

java.lang.IllegalArgumentException - Error when invoking method for a @Secret annotated field due to wrong arguments

java.lang.reflect.InvocationTargetException - Error when invoking method for a @Secret annotated field, the method threw a exception

generate128BitKey

public static java.lang.String generate128BitKey(java.lang.String password,
                                                 java.lang.String salt)
                                          throws java.security.NoSuchAlgorithmException,
                                                 java.io.UnsupportedEncodingException,
                                                 java.security.spec.InvalidKeySpecException

Utility method to help generate a strong 128 bit Key to be used for the DefaultAESCBCCipher. Note: This function is only provided as a utility to generate strong password it should be used statically to generate a key and then the key should be captured and used in your program. This function defaults to using 65536 iterations and 128 bits for key size. If you wish to use 256 bits key size then ensure that you have Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy installed and change the last argument to PBEKeySpec below to 256

Parameters:

password - A password which acts as a seed for generation of the key

salt - A salt used in combination with the password for the generation of the key

Returns:

A Base64 Encoded string representing the 128 bit key

Throws:

java.security.NoSuchAlgorithmException - if the KeyFactory algorithm is not found in available crypto providers

java.io.UnsupportedEncodingException - if the char encoding of the salt is not known.

java.security.spec.InvalidKeySpecException - invalid generated key