The ESAPI function for the TPM2_EC_Ephemeral command.

Functions
TSS2_RC	Esys_EC_Ephemeral_Async (ESYS_CONTEXT *esysContext, ESYS_TR shandle1, ESYS_TR shandle2, ESYS_TR shandle3, TPMI_ECC_CURVE curveID)
TSS2_RC	Esys_EC_Ephemeral (ESYS_CONTEXT *esysContext, ESYS_TR shandle1, ESYS_TR shandle2, ESYS_TR shandle3, TPMI_ECC_CURVE curveID, TPM2B_ECC_POINT **Q, UINT16 *counter)
TSS2_RC	Esys_EC_Ephemeral_Finish (ESYS_CONTEXT *esysContext, TPM2B_ECC_POINT **Q, UINT16 *counter)

Detailed Description

ESAPI function to invoke the TPM2_EC_Ephemeral command either as a one-call or in an asynchronous manner.

Function Documentation

Esys_EC_Ephemeral()

TSS2_RC Esys_EC_Ephemeral	(	ESYS_CONTEXT *	esysContext,
		ESYS_TR	shandle1,
		ESYS_TR	shandle2,
		ESYS_TR	shandle3,
		TPMI_ECC_CURVE	curveID,
		TPM2B_ECC_POINT **	Q,
		UINT16 *	counter
	)

One-Call function for TPM2_EC_Ephemeral

This function invokes the TPM2_EC_Ephemeral command in a one-call variant. This means the function will block until the TPM response is available. All input parameters are const. The memory for non-simple output parameters is allocated by the function implementation.

Parameters

[in,out]	esysContext	The ESYS_CONTEXT.
[in]	shandle1	First session handle.
[in]	shandle2	Second session handle.
[in]	shandle3	Third session handle.
[in]	curveID	The curve for the computed ephemeral point .
[out]	Q	Ephemeral public key Q := [r]G. (callee-allocated)
[out]	counter	Least-significant 16 bits of commitCount.

Return values

TSS2_RC_SUCCESS	if the function call was a success.
TSS2_ESYS_RC_BAD_REFERENCE	if the esysContext or required input pointers or required output handle references are NULL.
TSS2_ESYS_RC_BAD_CONTEXT	if esysContext corruption is detected.
TSS2_ESYS_RC_MEMORY	if the ESAPI cannot allocate enough memory for internal operations or return parameters.
TSS2_ESYS_RC_BAD_SEQUENCE	if the context has an asynchronous operation already pending.
TSS2_ESYS_RC_INSUFFICIENT_RESPONSE	if the TPM's response does not at least contain the tag, response length, and response code.
TSS2_ESYS_RC_MALFORMED_RESPONSE	if the TPM's response is corrupted.
TSS2_ESYS_RC_RSP_AUTH_FAILED	if the response HMAC from the TPM did not verify.
TSS2_ESYS_RC_MULTIPLE_DECRYPT_SESSIONS	if more than one session has the 'decrypt' attribute bit set.
TSS2_ESYS_RC_MULTIPLE_ENCRYPT_SESSIONS	if more than one session has the 'encrypt' attribute bit set.
TSS2_ESYS_RC_NO_DECRYPT_PARAM	if one of the sessions has the 'decrypt' attribute set and the command does not support encryption of the first command parameter.
TSS2_RCs	produced by lower layers of the software stack may be returned to the caller unaltered unless handled internally.

Esys_EC_Ephemeral_Async()

TSS2_RC Esys_EC_Ephemeral_Async	(	ESYS_CONTEXT *	esysContext,
		ESYS_TR	shandle1,
		ESYS_TR	shandle2,
		ESYS_TR	shandle3,
		TPMI_ECC_CURVE	curveID
	)

Asynchronous function for TPM2_EC_Ephemeral

This function invokes the TPM2_EC_Ephemeral command in a asynchronous variant. This means the function will return as soon as the command has been sent downwards the stack to the TPM. All input parameters are const. In order to retrieve the TPM's response call Esys_EC_Ephemeral_Finish.

Parameters

[in,out]	esysContext	The ESYS_CONTEXT.
[in]	shandle1	First session handle.
[in]	shandle2	Second session handle.
[in]	shandle3	Third session handle.
[in]	curveID	The curve for the computed ephemeral point .

Return values

ESYS_RC_SUCCESS	if the function call was a success.
TSS2_ESYS_RC_BAD_REFERENCE	if the esysContext or required input pointers or required output handle references are NULL.
TSS2_ESYS_RC_BAD_CONTEXT	if esysContext corruption is detected.
TSS2_ESYS_RC_MEMORY	if the ESAPI cannot allocate enough memory for internal operations or return parameters.
TSS2_RCs	produced by lower layers of the software stack may be returned to the caller unaltered unless handled internally.
TSS2_ESYS_RC_MULTIPLE_DECRYPT_SESSIONS	if more than one session has the 'decrypt' attribute bit set.
TSS2_ESYS_RC_MULTIPLE_ENCRYPT_SESSIONS	if more than one session has the 'encrypt' attribute bit set.
TSS2_ESYS_RC_NO_DECRYPT_PARAM	if one of the sessions has the 'decrypt' attribute set and the command does not support encryption of the first command parameter.

Esys_EC_Ephemeral_Finish()

TSS2_RC Esys_EC_Ephemeral_Finish	(	ESYS_CONTEXT *	esysContext,
		TPM2B_ECC_POINT **	Q,
		UINT16 *	counter
	)

Asynchronous finish function for TPM2_EC_Ephemeral

This function returns the results of a TPM2_EC_Ephemeral command invoked via Esys_EC_Ephemeral_Finish. All non-simple output parameters are allocated by the function's implementation. NULL can be passed for every output parameter if the value is not required.

Parameters

[in,out]	esysContext	The ESYS_CONTEXT.
[out]	Q	Ephemeral public key Q := [r]G. (callee-allocated)
[out]	counter	Least-significant 16 bits of commitCount.

Return values

TSS2_RC_SUCCESS	on success
ESYS_RC_SUCCESS	if the function call was a success.
TSS2_ESYS_RC_BAD_REFERENCE	if the esysContext or required input pointers or required output handle references are NULL.
TSS2_ESYS_RC_BAD_CONTEXT	if esysContext corruption is detected.
TSS2_ESYS_RC_MEMORY	if the ESAPI cannot allocate enough memory for internal operations or return parameters.
TSS2_ESYS_RC_BAD_SEQUENCE	if the context has an asynchronous operation already pending.
TSS2_ESYS_RC_TRY_AGAIN	if the timeout counter expires before the TPM response is received.
TSS2_ESYS_RC_INSUFFICIENT_RESPONSE	if the TPM's response does not at least contain the tag, response length, and response code.
TSS2_ESYS_RC_RSP_AUTH_FAILED	if the response HMAC from the TPM did not verify.
TSS2_ESYS_RC_MALFORMED_RESPONSE	if the TPM's response is corrupted.
TSS2_RCs	produced by lower layers of the software stack may be returned to the caller unaltered unless handled internally.