iaik.tc.tss.impl.java.tsp
Class TcHash

java.lang.Object
  iaik.tc.tss.impl.java.tsp.TcAttributes
      iaik.tc.tss.impl.java.tsp.TcWorkingObject
          iaik.tc.tss.impl.java.tsp.TcHash

All Implemented Interfaces:

TcIAttributes, TcIHash, TcIWorkingObject

public class TcHash
extends TcWorkingObject
implements TcIHash

Field Summary

static TcBlobData	PKCS1_MD2_IDENTIFIER PKCS#1 AlgorithmIdentifier for MD2.
static TcBlobData	PKCS1_MD4_IDENTIFIER PKCS#1 AlgorithmIdentifier for MD4.
static TcBlobData	PKCS1_MD5_IDENTIFIER PKCS#1 AlgorithmIdentifier for MD5.
static TcBlobData	PKCS1_SHA1_IDENTIFIER PKCS#1 AlgorithmIdentifier for SHA1.

Method Summary

TcBlobData	getHashValue() This method returns the hash value of the hash object.
void	setAttribAlgIdentifier(long subFlag, TcBlobData data) This method sets the hash algorithm identifier if the init flags TcTssConstants.TSS_HASH_OTHER was provided upon object creation.
void	setHashValue(TcBlobData hashValue) This method sets the hash value of the hash object.
TcBlobData	sign(TcIRsaKey key) This method signs the hash data of the object with the provided signing key.
java.lang.Object[]	tickStampBlob(TcIRsaKey key, TcTssValidation validationData) Time stamps a hash blog
void	updateHashValue(TcBlobData data) This method updates the hash object with new data.
void	verifySignature(TcBlobData signature, TcIRsaKey key) This method verifies the hash value of the hash object with a given signature.

Methods inherited from class iaik.tc.tss.impl.java.tsp.TcAttributes

getAttribData, getAttribUint32, setAttribData, setAttribUint32

Methods inherited from class java.lang.Object

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

Methods inherited from interface iaik.tc.tss.api.tspi.TcIAttributes

getAttribData, getAttribUint32, setAttribData, setAttribUint32

Field Detail

PKCS1_SHA1_IDENTIFIER

public static final TcBlobData PKCS1_SHA1_IDENTIFIER

PKCS#1 AlgorithmIdentifier for SHA1.

TSS Spec. 1.2 Errata A, page number:

351

PKCS1_MD5_IDENTIFIER

public static final TcBlobData PKCS1_MD5_IDENTIFIER

PKCS#1 AlgorithmIdentifier for MD5.

TSS Spec. 1.2 Errata A, page number:

351

PKCS1_MD4_IDENTIFIER

public static final TcBlobData PKCS1_MD4_IDENTIFIER

PKCS#1 AlgorithmIdentifier for MD4.

TSS Spec. 1.2 Errata A, page number:

351

PKCS1_MD2_IDENTIFIER

public static final TcBlobData PKCS1_MD2_IDENTIFIER

PKCS#1 AlgorithmIdentifier for MD2.

TSS Spec. 1.2 Errata A, page number:

351

Method Detail

getHashValue

public TcBlobData getHashValue()
                        throws TcTssException

Description copied from interface: TcIHash

This method returns the hash value of the hash object.

Specified by:

getHashValue in interface TcIHash

Returns:

Blob containing the hash data.

Throws:

TcTssException

setHashValue

public void setHashValue(TcBlobData hashValue)
                  throws TcTssException

Description copied from interface: TcIHash

This method sets the hash value of the hash object.

Specified by:

setHashValue in interface TcIHash

Parameters:

hashValue - The hash value to be set.

Throws:

TcTssException

sign

public TcBlobData sign(TcIRsaKey key)
                throws TcTssException

Description copied from interface: TcIHash

This method signs the hash data of the object with the provided signing key. The data to be signed must be set previously by calling

Specified by:

sign in interface TcIHash

Parameters:

key - Key object which should be used for the signature.

Returns:

The resulting signature data.

Throws:

TcTssException

updateHashValue

public void updateHashValue(TcBlobData data)
                     throws TcTssException

Description copied from interface: TcIHash

This method updates the hash object with new data. This method can only be called if the hash object was initialized as a with the TcTssConstants.TSS_HASH_SHA1 init flag. Update means that that the provided data is appended to an internal buffer that already holds the data from previous update operations. The SHA1 hash of this internal buffer can be obtained using the TcIHash.getHashValue() method. Calling updateHashValue(a) and updateHashValue(b) is equivalent to updateHashValue(a + b).

Specified by:

updateHashValue in interface TcIHash

Parameters:

data - Blob containing the data to be updated.

Throws:

TcTssException

verifySignature

public void verifySignature(TcBlobData signature,
                            TcIRsaKey key)
                     throws TcTssException

Description copied from interface: TcIHash

This method verifies the hash value of the hash object with a given signature. If no exception is thrown, the signature verification could be done successfully.

Specified by:

verifySignature in interface TcIHash

Parameters:

signature - The signature to be verified.

key - The key which should be used for the signature verification.

Throws:

TcTssException

setAttribAlgIdentifier

public void setAttribAlgIdentifier(long subFlag,
                                   TcBlobData data)
                            throws TcTssException

This method sets the hash algorithm identifier if the init flags TcTssConstants.TSS_HASH_OTHER was provided upon object creation.

Parameters:

subFlag - Ignored.

data - The hash DER encoded AlgorithmIdentifier as defined by the PKCS#1 specification.

Throws:

{@link - TcTssException}

TcTssException

tickStampBlob

public java.lang.Object[] tickStampBlob(TcIRsaKey key,
                                        TcTssValidation validationData)
                                 throws TcTssException

Time stamps a hash blog

Specified by:

tickStampBlob in interface TcIHash

Parameters:

key - Key to sign the time stamp

validationData - holds a nonce incorporated in stamping in the externalData_ field

Returns:

Object array of [0] validationData additionally externalData_ it now holds the signature in the field validationData_ [1] currentTicks at the time of stamping

Throws:

TcTssException