.TH "ifapi_policy_execution" 3 "Fri Oct 7 2022" "Version 3.2.0" "tpm2-tss" \" -*- nroff -*-
.ad l
.nh
.SH NAME
ifapi_policy_execution
.SH SYNOPSIS
.br
.PP
.SS "Functions"

.in +1c
.ti -1c
.RI "TSS2_RC \fBget_policy_digest_idx\fP (TPML_DIGEST_VALUES *digest_values, TPMI_ALG_HASH hashAlg, size_t *idx)"
.br
.ti -1c
.RI "TSS2_RC \fBifapi_extend_authorization\fP (\fBTPMS_POLICY\fP *policy, \fBTPMS_POLICYAUTHORIZATION\fP *authorization)"
.br
.ti -1c
.RI "TSS2_RC \fBifapi_policyeval_execute\fP (\fBESYS_CONTEXT\fP *esys_ctx, \fBIFAPI_POLICY_EXEC_CTX\fP *current_policy)"
.br
.ti -1c
.RI "TSS2_RC \fBifapi_policyeval_execute_prepare\fP (\fBIFAPI_POLICY_EXEC_CTX\fP *pol_ctx, TPMI_ALG_HASH hash_alg, \fBTPMS_POLICY\fP *policy)"
.br
.in -1c
.SH "Detailed Description"
.PP 
Provides internal functions for policy execution\&. 
.SH "Function Documentation"
.PP 
.SS "TSS2_RC get_policy_digest_idx (TPML_DIGEST_VALUES * digest_values, TPMI_ALG_HASH hashAlg, size_t * idx)"
Compute the index for the current digest list and clear the digest\&.
.PP
The list entry with the appropriate hash algorithm will be searched\&. The found digest will be set to zero\&.
.PP
\fBParameters:\fP
.RS 4
\fIdigest_values\fP The list of policy digests and corresponding hash algorithms\&. 
.br
\fIhashAlg\fP The hash algorithm to be searched\&. 
.br
\fIidx\fP The index of the found digest\&. 
.RE
.PP
\fBReturn values:\fP
.RS 4
\fITSS2_RC_SUCCESS\fP on success\&. 
.br
\fITSS2_FAPI_RC_BAD_VALUE\fP If no appropriate digest was found in the digest list\&. 
.RE
.PP

.SS "TSS2_RC ifapi_extend_authorization (\fBTPMS_POLICY\fP * policy, \fBTPMS_POLICYAUTHORIZATION\fP * authorization)"
Add a new authorization to a policy\&.
.PP
The the signed hash computed from the policy digest and the policyRef together with the public key of the key used for signing will be stored in the policy\&.
.PP
\fBParameters:\fP
.RS 4
\fIpolicy\fP The policy to be authorized\&. 
.br
\fIauthorization\fP The structure with the signature, the policyRef and the public key\&.
.RE
.PP
\fBReturn values:\fP
.RS 4
\fITSS2_RC_SUCCESS\fP on success\&. 
.br
\fITSS2_FAPI_RC_MEMORY\fP If the memory for the authorization list cannot be allocated\&. 
.RE
.PP

.SS "TSS2_RC ifapi_policyeval_execute (\fBESYS_CONTEXT\fP * esys_ctx, \fBIFAPI_POLICY_EXEC_CTX\fP * current_policy)"
Execute all policy commands defined by a list of policy elements\&.
.PP
\fBReturn values:\fP
.RS 4
\fITSS2_RC_SUCCESS\fP on success\&. 
.br
\fITSS2_FAPI_RC_MEMORY\fP if not enough memory can be allocated\&. 
.br
\fITSS2_FAPI_RC_BAD_VALUE\fP If wrong values are detected during execution\&. 
.br
\fITSS2_FAPI_RC_IO_ERROR\fP If an error occurs during access to the policy store\&. 
.br
\fITSS2_FAPI_RC_POLICY_UNKNOWN\fP If policy search for a certain policy digest was not successful\&. 
.br
\fITSS2_FAPI_RC_BAD_TEMPLATE\fP In a invalid policy is loaded during execution\&. 
.br
\fITSS2_FAPI_RC_TRY_AGAIN\fP if an I/O operation is not finished yet and this function needs to be called again\&. 
.br
\fITSS2_FAPI_RC_GENERAL_FAILURE\fP if an internal error occurred\&. 
.br
\fITSS2_FAPI_RC_BAD_SEQUENCE\fP if the context has an asynchronous operation already pending\&. 
.br
\fITSS2_FAPI_RC_BAD_REFERENCE\fP a invalid null pointer is passed\&. 
.br
\fITSS2_FAPI_RC_PATH_NOT_FOUND\fP if a FAPI object path was not found during authorization\&. 
.br
\fITSS2_FAPI_RC_KEY_NOT_FOUND\fP if a key was not found\&. 
.br
\fITSS2_FAPI_RC_AUTHORIZATION_UNKNOWN\fP if a required authorization callback is not set\&. 
.br
\fITSS2_FAPI_RC_AUTHORIZATION_FAILED\fP if the authorization attempt fails\&. 
.br
\fITSS2_ESYS_RC_*\fP possible error codes of ESAPI\&. 
.br
\fITSS2_FAPI_RC_BAD_PATH\fP if the path is used in inappropriate context or contains illegal characters\&. 
.br
\fITSS2_FAPI_RC_NOT_PROVISIONED\fP FAPI was not provisioned\&. 
.RE
.PP

.SS "TSS2_RC ifapi_policyeval_execute_prepare (\fBIFAPI_POLICY_EXEC_CTX\fP * pol_ctx, TPMI_ALG_HASH hash_alg, \fBTPMS_POLICY\fP * policy)"
Initialize policy element list to be executed and store policy in context\&.
.PP
\fBParameters:\fP
.RS 4
\fIpol_ctx\fP Context for execution of a list of policy elements\&. 
.br
\fIhash_alg\fP The hash algorithm used for the policy computation\&. 
.br
\fIpolicy\fP The policy to be executed\&. Some policy elements will be used to store computed parameters needed for policy execution\&. 
.RE
.PP
\fBReturn values:\fP
.RS 4
\fITSS2_RC_SUCCESS\fP on success\&. 
.br
\fITSS2_FAPI_RC_AUTHORIZATION_UNKNOWN\fP If the callback for branch selection is not defined\&. This callback will be needed of or policies have to be executed\&. 
.br
\fITSS2_FAPI_RC_BAD_VALUE\fP If the computed branch index deliverd by the callback does not identify a branch\&. 
.br
\fITSS2_FAPI_RC_MEMORY\fP if not enough memory can be allocated\&. 
.br
\fITSS2_FAPI_RC_BAD_REFERENCE\fP a invalid null pointer is passed\&. 
.br
\fITSS2_FAPI_RC_AUTHORIZATION_FAILED\fP if the authorization attempt fails\&. 
.RE
.PP

.SH "Author"
.PP 
Generated automatically by Doxygen for tpm2-tss from the source code\&.