ndn::security::tpm::Tpm Class Reference

TPM front-end class. More...

#include <ndn-cxx/security/tpm/tpm.hpp>

Inheritance diagram for ndn::security::tpm::Tpm:

Collaboration diagram for ndn::security::tpm::Tpm:

Classes
class	Error

Public Member Functions
	~Tpm ()
ConstBufferPtr	decrypt (span< const uint8_t > buf, const Name &keyName) const
	Decrypt blob using the key with name keyName. More...
ConstBufferPtr	getPublicKey (const Name &keyName) const
const std::string &	getTpmLocator () const
	Return the TPM Locator. More...
bool	hasKey (const Name &keyName) const
	Check if a private key exists. More...
bool	isTerminalMode () const
	Check if the TPM is in terminal mode. More...
bool	isTpmLocked () const
void	setTerminalMode (bool isTerminal) const
	Set the terminal mode of the TPM. More...
ConstBufferPtr	sign (const InputBuffers &bufs, const Name &keyName, DigestAlgorithm digestAlgorithm) const
	Sign discontiguous ranges using the key with name keyName and using the digest digestAlgorithm. More...
bool	unlockTpm (const char *password, size_t passwordLength) const
	Unlock the TPM. More...
boost::logic::tribool	verify (const InputBuffers &bufs, span< const uint8_t > sig, const Name &keyName, DigestAlgorithm digestAlgorithm) const
	Verify discontiguous ranges using the key with name keyName and using the digest digestAlgorithm. More...

Detailed Description

TPM front-end class.

The TPM (Trusted Platform Module) stores the private portion of a user's cryptography keys. The format and location of stored information is indicated by the TpmLocator. The TPM is designed to work with a PIB (Public Information Base) which stores public keys and related information such as certificate.

The TPM also provides functionalities of crypto transformation, such as signing and decryption.

A TPM consists of a unified front-end interface and a back-end implementation. The front-end cache the handles of private keys which is provided by the back-end implementation.

Note

Tpm instance is created and managed only by KeyChain. KeyChain::getTpm() returns a const reference to the managed Tpm instance, through which it is possible to check the existence of private keys, get the public key corresponding to a private key, sign, and decrypt the supplied buffers using managed private keys.

Definition at line 65 of file tpm.hpp.

Constructor & Destructor Documentation

~Tpm()

ndn::security::tpm::Tpm::~Tpm ( )

default

Member Function Documentation

decrypt()

ConstBufferPtr ndn::security::tpm::Tpm::decrypt	(	span< const uint8_t >	buf,
		const Name &	keyName
	)		const

Decrypt blob using the key with name keyName.

Returns

The decrypted data, or nullptr if the key does not exist.

Definition at line 91 of file tpm.cpp.

getPublicKey()

ConstBufferPtr ndn::security::tpm::Tpm::getPublicKey

(

const Name &

keyName

)

const

Returns

The public portion of an asymmetric key with name keyName, or nullptr if the key does not exist,

The public key is in PKCS#8 format.

Definition at line 66 of file tpm.cpp.

getTpmLocator()

const std::string& ndn::security::tpm::Tpm::getTpmLocator ( ) const

inline

Return the TPM Locator.

Definition at line 80 of file tpm.hpp.

hasKey()

bool ndn::security::tpm::Tpm::hasKey

(

const Name &

keyName

)

const

Check if a private key exists.

Parameters

keyName

The key name

Returns

true if the key exists

Definition at line 41 of file tpm.cpp.

isTerminalMode()

bool ndn::security::tpm::Tpm::isTerminalMode

(

)

const

Check if the TPM is in terminal mode.

Definition at line 98 of file tpm.cpp.

isTpmLocked()

bool ndn::security::tpm::Tpm::isTpmLocked

(

)

const

Returns

true if the TPM is locked, otherwise false.

Definition at line 110 of file tpm.cpp.

setTerminalMode()

void ndn::security::tpm::Tpm::setTerminalMode

(

bool

isTerminal

)

const

Set the terminal mode of the TPM.

When in terminal mode, the TPM will not ask user permission from GUI.

Definition at line 104 of file tpm.cpp.

sign()

ConstBufferPtr ndn::security::tpm::Tpm::sign	(	const InputBuffers &	bufs,
		const Name &	keyName,
		DigestAlgorithm	digestAlgorithm
	)		const

Sign discontiguous ranges using the key with name keyName and using the digest digestAlgorithm.

Returns

The signature, or nullptr if the key does not exist.

Definition at line 73 of file tpm.cpp.

unlockTpm()

bool ndn::security::tpm::Tpm::unlockTpm	(	const char *	password,
		size_t	passwordLength
	)		const

Unlock the TPM.

Parameters

password	The password to unlock the TPM.
passwordLength	The password size.

Definition at line 116 of file tpm.cpp.

verify()

boost::logic::tribool ndn::security::tpm::Tpm::verify	(	const InputBuffers &	bufs,
		span< const uint8_t >	sig,
		const Name &	keyName,
		DigestAlgorithm	digestAlgorithm
	)		const

Verify discontiguous ranges using the key with name keyName and using the digest digestAlgorithm.

Return values

true	the signature is valid
false	the signature is not valid
indeterminate	the key does not exist

Definition at line 80 of file tpm.cpp.