Package com.evolveum.midpoint.prism.crypto

Interface Protector

All Known Subinterfaces:

KeyStoreBasedProtector

public interface Protector

Field Summary

Fields

Modifier and Type	Field	Description
static String	XMLSEC_ENCRYPTION_ALGORITHM_AES128_CBC
static String	XMLSEC_ENCRYPTION_ALGORITHM_AES256_CBC
static String	XMLSEC_ENCRYPTION_NS

Method Summary

Modifier and Type	Method	Description
boolean	areEquivalent(ProtectedStringType a, ProtectedStringType b)	Decides equivalence of two protected data objects (for data management purposes).
boolean	compareCleartext(ProtectedStringType a, ProtectedStringType b)	Compare cleartext values protected inside the protected strings.
<T> void	decrypt(ProtectedData<T> protectedData)
String	decryptString(ProtectedData<String> protectedString)
<T> void	encrypt(ProtectedData<T> protectedData)
ProtectedStringType	encryptString(String text)
KeyStore	getKeyStore()
List<TrustManager>	getTrustManagers()	Returns a list of trust managers that will be used to validate communicating party credentials.
<T> void	hash(ProtectedData<T> protectedData)
boolean	isEncryptedByCurrentKey(@NotNull EncryptedDataType data)

Field Detail

XMLSEC_ENCRYPTION_NS

static final String XMLSEC_ENCRYPTION_NS

See Also:

Constant Field Values

XMLSEC_ENCRYPTION_ALGORITHM_AES128_CBC

static final String XMLSEC_ENCRYPTION_ALGORITHM_AES128_CBC

See Also:

Constant Field Values

XMLSEC_ENCRYPTION_ALGORITHM_AES256_CBC

static final String XMLSEC_ENCRYPTION_ALGORITHM_AES256_CBC

See Also:

Constant Field Values

Method Detail

decrypt

<T> void decrypt(ProtectedData<T> protectedData)
          throws EncryptionException,
                 SchemaException

Throws:

EncryptionException

SchemaException

encrypt

<T> void encrypt(ProtectedData<T> protectedData)
          throws EncryptionException

Throws:

EncryptionException

getTrustManagers

List<TrustManager> getTrustManagers()

Returns a list of trust managers that will be used to validate communicating party credentials. (e.g. used to validate remote connector connections).

getKeyStore

KeyStore getKeyStore()

decryptString

String decryptString(ProtectedData<String> protectedString)
              throws EncryptionException

Returns:

decrypted String from protectedString object

Throws:

EncryptionException - this is thrown probably in case JRE/JDK doesn't have JCE installed

IllegalArgumentException - if protectedString argument is null or EncryptedData in protectedString argument is null

encryptString

ProtectedStringType encryptString(String text)
                           throws EncryptionException

Returns:

ProtectedStringType with encrypted string inside it. If input argument is null or empty, method returns null.

Throws:

EncryptionException - this is thrown probably in case JRE/JDK doesn't have JCE installed

hash

<T> void hash(ProtectedData<T> protectedData)
       throws EncryptionException,
              SchemaException

Throws:

EncryptionException

SchemaException

compareCleartext

boolean compareCleartext(ProtectedStringType a,
                         ProtectedStringType b)
                  throws EncryptionException,
                         SchemaException

Compare cleartext values protected inside the protected strings.

This method only deals with the equality of the original values (cleartext). If the two protected strings are representation of the same value then true value is returned. In all other cases false value is returned.

Please note that some cases are not decidable. For example it may not be possible to compare two hashed values, e.g. in case that they are using different salt values. SchemaException is thrown in that case.

This method does not deal with any details about the protection. It just deals with equality of the values. E.g. if encrypted and hashed version of the same value is compared, this method returns true. This is ideal for use cases such as checking equality of a password during authentication. But it is not the right algorithm for data management purposes. E.g. it will provide bad results if it is used to decide whether a particular value should be replaced with a new value in a data store. Please see areEquivalent() method.

Throws:

EncryptionException

SchemaException

See Also:

areEquivalent(ProtectedStringType, ProtectedStringType)

areEquivalent

boolean areEquivalent(ProtectedStringType a,
                      ProtectedStringType b)
               throws EncryptionException,
                      SchemaException

Decides equivalence of two protected data objects (for data management purposes).

The concept of equivalence is a very tricky one when it comes to protected (encrypted and hashed) data. We want to compare the original values (cleartext) and not the bytes that are a product of encryption (ciphertext). As many ciphers have randomized initialization vectors, encrypting the same cleartext will produce different ciphertext. Therefore we cannot rely on equality of ciphertexts. On the other hand, we want to allow re-keying. Therefore protected data types that are produced from the same cleartext may still be non-equivalent if a different key was used to create them. Otherwise we want be able to change the key, as the value with old key will be considered equivalent and it may never get replaced.

And all of that is further complicated with hashing. Hash algorithms are often salted, therefore we cannot rely on comparing just the hashes. The situation is a bit easier here as we do not need to deal with the key, but on the other hand we do not have access to a cleartext at all. Therefore all we can do is to look at hashed values and suffer re-salting all the time. But it is better than the alternative, which means never be able to change hashed value. If any more intelligent behavior is expected, it has to be implemented in higher layers of the system where we still have at least one unhashed clear value available.

This method is designed for data management purposes. E.g. it can be used to decide whether to replace certain value in a data store. This method is not suitable for all purposes. E.g. it should NOT be used for password management. This method may return false even if the cleartext in two protected strings is the same, e.g. in case that one is encrypted and the other is hashed. For that purpose see the compareCleartext method.

Throws:

EncryptionException

SchemaException

See Also:

compareCleartext(ProtectedStringType, ProtectedStringType)

isEncryptedByCurrentKey

boolean isEncryptedByCurrentKey(@NotNull
                                @NotNull EncryptedDataType data)
                         throws EncryptionException

Throws:

EncryptionException