.TH "Fapi_Unseal" 3 "Sun Feb 19 2023" "Version 3.2.1" "tpm2-tss" \" -*- nroff -*-
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.SH NAME
Fapi_Unseal \- Fapi_Unseal
.SH SYNOPSIS
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.PP
.SS "Functions"

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.ti -1c
.RI "TSS2_RC \fBFapi_Unseal\fP (\fBFAPI_CONTEXT\fP *context, char const *path, uint8_t **data, size_t *size)"
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.RI "TSS2_RC \fBFapi_Unseal_Async\fP (\fBFAPI_CONTEXT\fP *context, char const *path)"
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.RI "TSS2_RC \fBFapi_Unseal_Finish\fP (\fBFAPI_CONTEXT\fP *context, uint8_t **data, size_t *size)"
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.in -1c
.SH "Detailed Description"
.PP 
FAPI functions to invoke Unseal either as one-call or in an asynchronous manner\&. 
.SH "Function Documentation"
.PP 
.SS "Fapi_Unseal (\fBFAPI_CONTEXT\fP * context, char const * path, uint8_t ** data, size_t * size)"
One-Call function for Fapi_Unseal
.PP
Unseals data from a seal in the FAPI metadata store\&.
.PP
\fBParameters\fP
.RS 4
\fIcontext\fP The \fBFAPI_CONTEXT\fP 
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\fIpath\fP The path to the sealed data 
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\fIdata\fP The decrypted data after unsealing\&. May be NULL 
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\fIsize\fP The size of data in bytes\&. May be NULL
.RE
.PP
\fBReturn values\fP
.RS 4
\fITSS2_RC_SUCCESS\fP if the function call was a success\&. 
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\fITSS2_FAPI_RC_BAD_REFERENCE\fP if context or path is NULL\&. 
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\fITSS2_FAPI_RC_BAD_CONTEXT\fP if context corruption is detected\&. 
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\fITSS2_FAPI_RC_BAD_PATH\fP if path does not point to a sealed data object\&. 
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\fITSS2_FAPI_RC_BAD_VALUE\fP if the digestSize is zero\&. 
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\fITSS2_FAPI_RC_BAD_SEQUENCE\fP if the context has an asynchronous operation already pending\&. 
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\fITSS2_FAPI_RC_IO_ERROR\fP if the data cannot be saved\&. 
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\fITSS2_FAPI_RC_MEMORY\fP if the FAPI cannot allocate enough memory for internal operations or return parameters\&. 
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\fITSS2_FAPI_RC_NO_TPM\fP if FAPI was initialized in no-TPM-mode via its config file\&. 
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\fITSS2_FAPI_RC_TRY_AGAIN\fP if an I/O operation is not finished yet and this function needs to be called again\&. 
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\fITSS2_FAPI_RC_PATH_NOT_FOUND\fP if a FAPI object path was not found during authorization\&. 
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\fITSS2_FAPI_RC_KEY_NOT_FOUND\fP if a key was not found\&. 
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\fITSS2_FAPI_RC_GENERAL_FAILURE\fP if an internal error occurred\&. 
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\fITSS2_FAPI_RC_SIGNATURE_VERIFICATION_FAILED\fP if the signature could not be verified 
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\fITSS2_ESYS_RC_*\fP possible error codes of ESAPI\&. 
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\fITSS2_FAPI_RC_NOT_PROVISIONED\fP FAPI was not provisioned\&. 
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\fITSS2_FAPI_RC_AUTHORIZATION_UNKNOWN\fP if a required authorization callback is not set\&. 
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\fITSS2_FAPI_RC_AUTHORIZATION_FAILED\fP if the authorization attempt fails\&. 
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\fITSS2_FAPI_RC_POLICY_UNKNOWN\fP if policy search for a certain policy digest was not successful\&. 
.RE
.PP

.SS "Fapi_Unseal_Async (\fBFAPI_CONTEXT\fP * context, char const * path)"
Asynchronous function for Fapi_Unseal
.PP
Unseals data from a seal in the FAPI metadata store\&.
.PP
Call Fapi_Unseal_Finish to finish the execution of this command\&.
.PP
\fBParameters\fP
.RS 4
\fIcontext\fP The \fBFAPI_CONTEXT\fP 
.br
\fIpath\fP The path to the sealed data
.RE
.PP
\fBReturn values\fP
.RS 4
\fITSS2_RC_SUCCESS\fP if the function call was a success\&. 
.br
\fITSS2_FAPI_RC_BAD_REFERENCE\fP if context or path is NULL\&. 
.br
\fITSS2_FAPI_RC_BAD_CONTEXT\fP if context corruption is detected\&. 
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\fITSS2_FAPI_RC_BAD_PATH\fP if path does not point to a sealed data object\&. 
.br
\fITSS2_FAPI_RC_BAD_VALUE\fP if the digestSize is zero\&. 
.br
\fITSS2_FAPI_RC_BAD_SEQUENCE\fP if the context has an asynchronous operation already pending\&. 
.br
\fITSS2_FAPI_RC_IO_ERROR\fP if the data cannot be saved\&. 
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\fITSS2_FAPI_RC_MEMORY\fP if the FAPI cannot allocate enough memory for internal operations or return parameters\&. 
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\fITSS2_FAPI_RC_NO_TPM\fP if FAPI was initialized in no-TPM-mode via its config file\&. 
.RE
.PP

.SS "Fapi_Unseal_Finish (\fBFAPI_CONTEXT\fP * context, uint8_t ** data, size_t * size)"
Asynchronous finish function for Fapi_Unseal
.PP
This function should be called after a previous Fapi_Unseal_Async\&.
.PP
\fBParameters\fP
.RS 4
\fIcontext\fP The \fBFAPI_CONTEXT\fP 
.br
\fIdata\fP The decrypted data after unsealing\&. May be NULL 
.br
\fIsize\fP The size of data in bytes\&. May be NULL
.RE
.PP
\fBReturn values\fP
.RS 4
\fITSS2_RC_SUCCESS\fP if the function call was a success\&. 
.br
\fITSS2_FAPI_RC_BAD_REFERENCE\fP if context is NULL\&. 
.br
\fITSS2_FAPI_RC_BAD_CONTEXT\fP if context corruption is detected\&. 
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\fITSS2_FAPI_RC_BAD_SEQUENCE\fP if the context has an asynchronous operation already pending\&. 
.br
\fITSS2_FAPI_RC_IO_ERROR\fP if the data cannot be saved\&. 
.br
\fITSS2_FAPI_RC_MEMORY\fP if the FAPI cannot allocate enough memory for internal operations or return parameters\&. 
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\fITSS2_FAPI_RC_TRY_AGAIN\fP if the asynchronous operation is not yet complete\&. Call this function again later\&. 
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\fITSS2_FAPI_RC_PATH_NOT_FOUND\fP if a FAPI object path was not found during authorization\&. 
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\fITSS2_FAPI_RC_KEY_NOT_FOUND\fP if a key was not found\&. 
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\fITSS2_FAPI_RC_BAD_VALUE\fP if an invalid value was passed into the function\&. 
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\fITSS2_FAPI_RC_GENERAL_FAILURE\fP if an internal error occurred\&. 
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\fITSS2_FAPI_RC_SIGNATURE_VERIFICATION_FAILED\fP if the signature could not be verified 
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\fITSS2_ESYS_RC_*\fP possible error codes of ESAPI\&. 
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\fITSS2_FAPI_RC_NOT_PROVISIONED\fP FAPI was not provisioned\&. 
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\fITSS2_FAPI_RC_BAD_PATH\fP if the path is used in inappropriate context or contains illegal characters\&. 
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\fITSS2_FAPI_RC_AUTHORIZATION_UNKNOWN\fP if a required authorization callback is not set\&. 
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\fITSS2_FAPI_RC_AUTHORIZATION_FAILED\fP if the authorization attempt fails\&. 
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\fITSS2_FAPI_RC_POLICY_UNKNOWN\fP if policy search for a certain policy digest was not successful\&. 
.RE
.PP

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