CODEX_Ciphers::RSAPlaintextPK Class Reference

RSA proof of plaintext knowledge. More...

Inheritance diagram for CODEX_Ciphers::RSAPlaintextPK:

[legend]Collaboration diagram for CODEX_Ciphers::RSAPlaintextPK:


Public Types
typedef CODEX_ASN1::Array< CODEX_ASN1::BigNumber >	ArrayType
	Shorthand for the arrays of proof values.
Public Methods
	RSAPlaintextPK ()
	Default constructor, for creating an object to be unmarshalled.
	RSAPlaintextPK (const CODEX_ASN1::SecureBigNumber &plaintext, const RSAPublicKey &publicKey, const CODEX_ASN1::Base &id, const HashFunction &hashFunc)
	RSAPlaintextPK (const RSAPlaintextPK &aPPK)
	Copy constructor.
virtual	~RSAPlaintextPK ()
	Virtual destructor.
void	operator= (const RSAPlaintextPK &aPPK)
	Assignment operator.
bool	verify (const RSACipherText &ciphertext, const RSAPublicKey &publicKey, const CODEX_ASN1::Base &id, const HashFunction &hashFunc) const
	Verify a proof.
int	marshal (unsigned char **pp) const
	This function creates a serialized representation of the object, which is returned through the argument pp.
void *	unmarshal (void bogus, unsigned char *pp, long length)
	This function takes a serialized representation of the object and recreates the object representation.

Detailed Description

RSA proof of plaintext knowledge.

This uses the identity proof of Ohta and Okamoto, which is similar to the Guillou-Quisquater identify proof (an extension of Fiat-Shamir).

See also:: Kazuo Ohta and Tatsuaki Okamoto. A Modification of the Fiat-Shamir Scheme. Advances in Cryptology---CRYPTO '88, Proceedings, LNCS 403:232--243, Springer-Verlag, 1990.

Definition at line 37 of file RSAPlaintextPK.h.

RSAPlaintextPK::RSAPlaintextPK ( const CODEX_ASN1::SecureBigNumber & plaintext,

const RSAPublicKey & publicKey,

const CODEX_ASN1::Base & id,

const HashFunction & hashFunc

)

Parameters:

plaintext The plaintext of which knowledge is to be proven.

publicKey The public key under which the plaintext is being encrypted.

id A serializable object providing identifying information about the prover.

hashFunc A cryptographically secure hash function.

Definition at line 30 of file RSAPlaintextPK.cc.
References CODEX_ASN1::Array< CODEX_ASN1::BigNumber >::append(), CODEX_Ciphers::RSAPublicKey::e(), CODEX_Ciphers::RSAPublicKey::encrypt(), CODEX_ASN1::Base::initialized(), CODEX_ASN1::Base::marshal(), CODEX_ASN1::BigNumber::marshal(), CODEX_ASN1::Array< CODEX_ASN1::BigNumber >::marshal(), CODEX_Ciphers::RSAPublicKey::n(), CODEX_ASN1::Array< CODEX_ASN1::BigNumber >::size(), and CODEX_ASN1::BigNumber::value().

int RSAPlaintextPK::marshal ( unsigned char ** pp ) const [virtual]

This function creates a serialized representation of the object, which is returned through the argument pp.
This must be overridden by the concrete derived class.
Parameters:

pp Serialized form of the object

Returns:
Length of the marshalled data

Implements CODEX_ASN1::Base.
Definition at line 340 of file RSAPlaintextPK.cc.
References CODEX_ASN1::Array< CODEX_ASN1::BigNumber >::marshal().
Referenced by CODEX_Client::WriteKeyMsg::marshal(), and CODEX_Client::ReadKeyMsg::marshal().

void * RSAPlaintextPK::unmarshal ( void * bogus,

unsigned char ** pp,

long length

) [virtual]

This function takes a serialized representation of the object and recreates the object representation.
This must be overridden by the concrete derived class.
Parameters:

bogus Included for compatibility with OpenSSL ASN.1 macros

pp Serialized form of the data

length Number of bytes of pp to unmarshal

Returns:
success or failure of the unmarshalling

Implements CODEX_ASN1::Base.
Definition at line 355 of file RSAPlaintextPK.cc.
References CODEX_ASN1::Base::m_initialized, and CODEX_ASN1::Array< CODEX_ASN1::BigNumber >::unmarshal().
Referenced by CODEX_Client::WriteKeyMsg::unmarshal(), and CODEX_Client::ReadKeyMsg::unmarshal().

The documentation for this class was generated from the following files:

Generated on Wed Jun 2 16:33:04 2004 for COrnell Data EXchange (CODEX) by

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