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Class semper.statement.StatementTransaction

java.lang.Object
   |
   +----semper.statement.StatementTransaction

public class StatementTransaction

extends Object

implements StatementConstants, CryptoConstants

Version:

$Revision: 1.9 $ $Date: 1996/09/02 14:35:50 $

Author:

Jesper Drud Nielsen ([email protected])

StatementTransaction(String, String, CryptoKeyInfo, CryptoKeyInfo, Certificate, CryptoKeyInfo, CryptoKeyInfo, CryptoKeyInfo, CryptoKeyInfo, int, int, int)

creates a new StatementTransaction object.

decipher(Statement)

Decipher a ciphered statement.

encipher(Statement)

Encipher a statement.

generateMAC(Statement, Date)

Generate a (keyed) MAC value on a statement object.

generateSignature(Statement)

Sign a statement.

getRecipient(Statement)

Get the recipient.

getSender(Statement)

Get the sender.

myStreamSize(StreamOutputInterface)

Returns the size of the StatementTransaction object when externalized.

pkDecipher(Statement)

Decipher a pkEnciphered statement object using skCipherOwn.

pkEncipher(Statement)

Encipher a statement object under a random conventional key (same algorithm as the session key, and include the DES key enciphered under pkSignaturePartner.

readObject(StreamInputInterface)

Internalizes a StatementTransaction object.

setRecipient(Statement)

Set the recipient.

setSender(Statement)

Set the sender.

verifyMAC(Statement)

Verify a (keyed) MAC value on a statement object.

verifySignature(Statement, Date, Date)

Verify the signature in a signed statement.

writeObject(StreamOutputInterface)

Externalizes a StatementTransaction object.

  public StatementTransaction(String newSenderId,
                              String newRecipientId,
                              CryptoKeyInfo newSessionKeyEnc,
                              CryptoKeyInfo newSessionKeyMAC,
                              Certificate newCertificateSignatureOwn,
                              CryptoKeyInfo newSKSignatureOwn,
                              CryptoKeyInfo newSKCipherOwn,
                              CryptoKeyInfo newPkSignaturePartner,
                              CryptoKeyInfo newPkCipherPartner,
                              int newHashAlg,
                              int newMACalg,
                              int newKeyEncryption)

creates a new StatementTransaction object. The StatementTransaction object may be used in case multiple consecutive operation are to be performed on the same Statement object. The StatementTransaction will contain a user defined context to be used for each operation on the Statement (sender identification, recipient identification, MAC verification key etc).

Parameters:

newSenderId - sender identification

newRecipientId - recipient identification

newSessionKeyEnc - new session key for encryption

newSessionKeyMAC - new session key for MAC

newCertificateSignatureOwn - users own certificate used by generateSignature

newSkSignatureOwn - secret key used to make signatures

newSkCipherOwn - secret key used for public key decryption

newPkSignaturePartner - public key to use when verifyin a signature

newPkCipherPartner - public key to use when pkEncrypting a statement

newHashAlg - designates the hash algorithm to be used in this session

newMACalg - designates the MAC algorithm to be used

newKeyEncryption - is the preferred mode of padding when encrypting conv. keys

See Also:

Statement

  public int encipher(Statement s) throws StatementManException

Encipher a statement. The statement is enciphered using the session key.

Parameters:

s - the statement on which to operate

Throws: StatementManException

if the encryption fails

See Also:

encipher

  public int decipher(Statement s) throws StatementManException

Decipher a ciphered statement. The statement is deiphered using the keyDecipher key.

Parameters:

s - the statement on which to operate

Throws: StatementManException

if the decryption fails

See Also:

decipher

  public int generateSignature(Statement s) throws StatementManException

Sign a statement. Signs the statement using the skSignatureOwn.

Parameters:

s - the statement on which to operate

Throws: StatementManException

if signing fails

See Also:

generateSignature

  public int verifySignature(Statement s,
                             Date timewindowstart,
                             Date timewindowend) throws StatementManException

Verify the signature in a signed statement. The signature is verified using pkSignaturePartner

Parameters:

s - the statement on which to operate

Returns:

0 if the signature is ok and 1 otherwise

Throws: StatementManException

if the process fails

See Also:

verifySignature

  public int generateMAC(Statement s,
                         Date date) throws StatementManException

Generate a (keyed) MAC value on a statement object. The MAC value is generated using sessionKeyMAC.

Parameters:

s - the statement on which to operate

Throws: StatementManException

if the process fails

See Also:

generateMAC

  public int verifyMAC(Statement s) throws StatementManException

Verify a (keyed) MAC value on a statement object. The MAC value is verified using sessionKeyMAC.

Parameters:

s - the statement on which to operate

Returns:

0 if the MAC is OK and 1 otherwise

Throws: StatementManException

if the process fails

See Also:

verifyMAC

  public int pkEncipher(Statement s) throws StatementManException

Encipher a statement object under a random conventional key (same algorithm as the session key, and include the DES key enciphered under pkSignaturePartner.

Parameters:

s - the statement on which to operate

Throws: StatementManException

if the encryption fails

See Also:

pkDecipher

  public int pkDecipher(Statement s) throws StatementManException

Decipher a pkEnciphered statement object using skCipherOwn.

Parameters:

s - the statement on which to operate

Throws: StatementManException

if the the Statement could not be deciphered

See Also:

pkDecipher

  public void setSender(Statement s)

Set the sender. The senderId attribute is set to senderId. A null string clears the sender.

Parameters:

s - the statement on which to operate

See Also:

getSender

  public String getSender(Statement s)

Get the sender. The senderId attribute is returned as a string. A null string means "no sender".

Parameters:

s - the statement on which to operate

Returns:

the sender identification

See Also:

setSender

  public void setRecipient(Statement s)

Set the recipient. The recipientId attribute is set to a specified string. A null string clears the recipient.

Parameters:

s - the statement on which to operate

See Also:

getRecipient

  public String getRecipient(Statement s)

Get the recipient. The recipientId attribute is returned as a string. A null string means "no recipient".

Parameters:

s - the statement on which to operate

Returns:

the recipient identification

See Also:

setRecipient

  public void writeObject(StreamOutputInterface s) throws StreamIOException

Externalizes a StatementTransaction object. By calling this method a StatementTransaction will be written to the IO stream.

Parameters:

s - is the StreamOutputInterface onto which the object is written

Returns:

no return value

Throws: IOException

If the output data is corrupt.

  public void readObject(StreamInputInterface s) throws StreamIOException

Internalizes a StatementTransaction object. By calling this method a StatementTransaction will be read from the IO stream.

Parameters:

s - is the StreamOutputInterface from which the object is read

Returns:

no return value

Throws: IOException

If the input data is corrupt.

See Also:

readObject

  public int myStreamSize(StreamOutputInterface s) throws StreamIOException

Returns the size of the StatementTransaction object when externalized.

Parameters:

s - is the StreamOutputInterface relative to which the size is computed

Returns:

Size of externalized object

Throws: IOException

if the size could not be computed

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