Provided by: libtss2-doc_3.2.1-3ubuntu1_all 
NAME
Esys_PolicySecret - The ESAPI function for the TPM2_PolicySecret command.
SYNOPSIS
Functions
TSS2_RC Esys_PolicySecret_Async (ESYS_CONTEXT *esysContext, ESYS_TR authHandle, ESYS_TR
policySession, ESYS_TR shandle1, ESYS_TR shandle2, ESYS_TR shandle3, const TPM2B_NONCE
*nonceTPM, const TPM2B_DIGEST *cpHashA, const TPM2B_NONCE *policyRef, INT32
expiration)
TSS2_RC Esys_PolicySecret (ESYS_CONTEXT *esysContext, ESYS_TR authHandle, ESYS_TR
policySession, ESYS_TR shandle1, ESYS_TR shandle2, ESYS_TR shandle3, const TPM2B_NONCE
*nonceTPM, const TPM2B_DIGEST *cpHashA, const TPM2B_NONCE *policyRef, INT32
expiration, TPM2B_TIMEOUT **timeout, TPMT_TK_AUTH **policyTicket)
TSS2_RC Esys_PolicySecret_Finish (ESYS_CONTEXT *esysContext, TPM2B_TIMEOUT **timeout,
TPMT_TK_AUTH **policyTicket)
Detailed Description
ESAPI function to invoke the TPM2_PolicySecret command either as a one-call or in an
asynchronous manner.
Function Documentation
TSS2_RC Esys_PolicySecret (ESYS_CONTEXT * esysContext, ESYS_TR authHandle, ESYS_TR
policySession, ESYS_TR shandle1, ESYS_TR shandle2, ESYS_TR shandle3, const TPM2B_NONCE *
nonceTPM, const TPM2B_DIGEST * cpHashA, const TPM2B_NONCE * policyRef, INT32 expiration,
TPM2B_TIMEOUT ** timeout, TPMT_TK_AUTH ** policyTicket)
One-Call function for TPM2_PolicySecret
This function invokes the TPM2_PolicySecret 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
esysContext The ESYS_CONTEXT.
authHandle Handle for an entity providing the authorization.
policySession Handle for the policy session being extended.
shandle1 Session handle for authorization of authHandle
shandle2 Second session handle.
shandle3 Third session handle.
nonceTPM The policy nonce for the session.
cpHashA Digest of the command parameters to which this authorization is limited.
policyRef A reference to a policy relating to the authorization
• may be the Empty Buffer.
expiration Time when authorization will expire, measured in seconds from the time that
nonceTPM was generated.
timeout Implementation-specific time value used to indicate to the TPM when the ticket
expires; this ticket will use the TPMT_ST_AUTH_SECRET structure tag. (callee-
allocated)
policyTicket Produced if the command succeeds and expiration in the command was non-
zero ( See 23.2.5). (callee-allocated)
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_BAD_TR if any of the ESYS_TR objects are unknown to the ESYS_CONTEXT or
are of the wrong type or if required ESYS_TR objects are ESYS_TR_NONE.
TSS2_RCs produced by lower layers of the software stack may be returned to the caller
unaltered unless handled internally.
TSS2_RC Esys_PolicySecret_Async (ESYS_CONTEXT * esysContext, ESYS_TR authHandle, ESYS_TR
policySession, ESYS_TR shandle1, ESYS_TR shandle2, ESYS_TR shandle3, const TPM2B_NONCE *
nonceTPM, const TPM2B_DIGEST * cpHashA, const TPM2B_NONCE * policyRef, INT32 expiration)
Asynchronous function for TPM2_PolicySecret
This function invokes the TPM2_PolicySecret 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_PolicySecret_Finish.
Parameters
esysContext The ESYS_CONTEXT.
authHandle Handle for an entity providing the authorization.
policySession Handle for the policy session being extended.
shandle1 Session handle for authorization of authHandle
shandle2 Second session handle.
shandle3 Third session handle.
nonceTPM The policy nonce for the session.
cpHashA Digest of the command parameters to which this authorization is limited.
policyRef A reference to a policy relating to the authorization
• may be the Empty Buffer.
expiration Time when authorization will expire, measured in seconds from the time that
nonceTPM was generated.
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_BAD_TR if any of the ESYS_TR objects are unknown to the ESYS_CONTEXT or
are of the wrong type or if required ESYS_TR objects are ESYS_TR_NONE.
TSS2_RC Esys_PolicySecret_Finish (ESYS_CONTEXT * esysContext, TPM2B_TIMEOUT ** timeout,
TPMT_TK_AUTH ** policyTicket)
Asynchronous finish function for TPM2_PolicySecret
This function returns the results of a TPM2_PolicySecret command invoked via
Esys_PolicySecret_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
esysContext The ESYS_CONTEXT.
timeout Implementation-specific time value used to indicate to the TPM when the ticket
expires; this ticket will use the TPMT_ST_AUTH_SECRET structure tag. (callee-
allocated)
policyTicket Produced if the command succeeds and expiration in the command was non-
zero ( See 23.2.5). (callee-allocated)
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.
Author
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