---
name: "Fapi_SetAppData"
section: "3"
platform: "linux"
package: "tpm2-tss"
version: "4.2.0-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Fapi_SetAppData"
---

# Fapi\_SetAppData(3)

Fapi\_SetAppData

## NAME

Fapi\_SetAppData - Fapi\_SetAppData

## SYNOPSIS

### Functions

TSS2\_RC **Fapi\_SetAppData** (**FAPI\_CONTEXT** \*context, char const \*path, uint8\_t const \*appData, size\_t appDataSize)\
 TSS2\_RC **Fapi\_SetAppData\_Async** (**FAPI\_CONTEXT** \*context, char const \*path, uint8\_t const \*appData, size\_t appDataSize)\
 TSS2\_RC **Fapi\_SetAppData\_Finish** (**FAPI\_CONTEXT** \*context)\

## Detailed Description

FAPI functions to invoke SetAppData either as one-call or in an asynchronous manner.

## Function Documentation

### TSS2\_RC Fapi\_SetAppData (FAPI\_CONTEXT \* context, char const \* path, uint8\_t const \* appData, size\_t appDataSize)

One-Call function for Fapi\_SetAppData

Associates an arbitrary data blob with a given object.

**Parameters**

*context* The **FAPI\_CONTEXT** \
 *path* The path to the object the blob is associated with \
 *appData* The blob to associate with the object. May be NULL \
 *appDataSize* The size of appData in bytes. Must be 0 if appData is NULL

**Return values**

*TSS2\_RC\_SUCCESS* if the function call was a success. \
 *TSS2\_FAPI\_RC\_BAD\_REFERENCE* if context or path is NULL or if appData is NULL and appDataSize is not 0. \
 *TSS2\_FAPI\_RC\_BAD\_CONTEXT* if context corruption is detected. \
 *TSS2\_FAPI\_RC\_BAD\_PATH* if path does not map to a FAPI entity. \
 *TSS2\_FAPI\_RC\_BAD\_SEQUENCE* if the context has an asynchronous operation already pending. \
 *TSS2\_FAPI\_RC\_IO\_ERROR* if the data cannot be saved. \
 *TSS2\_FAPI\_RC\_MEMORY* if the FAPI cannot allocate enough memory for internal operations or return parameters. \
 *TSS2\_FAPI\_RC\_BAD\_VALUE* if an invalid value was passed into the function. \
 *TSS2\_FAPI\_RC\_PATH\_NOT\_FOUND* if a FAPI object path was not found during authorization. \
 *TSS2\_FAPI\_RC\_KEY\_NOT\_FOUND* if a key was not found. \
 *TSS2\_FAPI\_RC\_TRY\_AGAIN* if an I/O operation is not finished yet and this function needs to be called again. \
 *TSS2\_FAPI\_RC\_GENERAL\_FAILURE* if an internal error occurred. \
 *TSS2\_FAPI\_RC\_NOT\_PROVISIONED* FAPI was not provisioned.

### TSS2\_RC Fapi\_SetAppData\_Async (FAPI\_CONTEXT \* context, char const \* path, uint8\_t const \* appData, size\_t appDataSize)

One-Call function for Fapi\_SetAppData

Associates an arbitrary data blob with a given object.

Call Fapi\_SetAppData\_Finish to finish the execution of this command.

**Parameters**

*context* The **FAPI\_CONTEXT** \
 *path* The path to the object the blob is associated with \
 *appData* The blob to associate with the object. May be NULL \
 *appDataSize* The size of appData in bytes. Must be 0 if appData is NULL

**Return values**

*TSS2\_RC\_SUCCESS* if the function call was a success. \
 *TSS2\_FAPI\_RC\_BAD\_REFERENCE* if context or path is NULL or if appData is NULL and appDataSize is not 0. \
 *TSS2\_FAPI\_RC\_BAD\_CONTEXT* if context corruption is detected. \
 *TSS2\_FAPI\_RC\_BAD\_PATH* if path does not map to a FAPI entity. \
 *TSS2\_FAPI\_RC\_BAD\_SEQUENCE* if the context has an asynchronous operation already pending. \
 *TSS2\_FAPI\_RC\_IO\_ERROR* if the data cannot be saved. \
 *TSS2\_FAPI\_RC\_MEMORY* if the FAPI cannot allocate enough memory for internal operations or return parameters. \
 *TSS2\_FAPI\_RC\_BAD\_VALUE* if an invalid value was passed into the function. \
 *TSS2\_FAPI\_RC\_PATH\_NOT\_FOUND* if a FAPI object path was not found during authorization. \
 *TSS2\_FAPI\_RC\_KEY\_NOT\_FOUND* if a key was not found. \
 *TSS2\_FAPI\_RC\_NOT\_PROVISIONED* FAPI was not provisioned.

### TSS2\_RC Fapi\_SetAppData\_Finish (FAPI\_CONTEXT \* context)

Asynchronous finish function for Fapi\_SetAppData

This function should be called after a previous Fapi\_SetAppData\_Async.

**Parameters**

*context* The **FAPI\_CONTEXT**

**Return values**

*TSS2\_RC\_SUCCESS* if the function call was a success. \
 *TSS2\_FAPI\_RC\_BAD\_REFERENCE* if context is NULL. \
 *TSS2\_FAPI\_RC\_BAD\_CONTEXT* if context corruption is detected. \
 *TSS2\_FAPI\_RC\_BAD\_SEQUENCE* if the context has an asynchronous operation already pending. \
 *TSS2\_FAPI\_RC\_IO\_ERROR* if the data cannot be saved. \
 *TSS2\_FAPI\_RC\_MEMORY* if the FAPI cannot allocate enough memory for internal operations or return parameters. \
 *TSS2\_FAPI\_RC\_TRY\_AGAIN* if the asynchronous operation is not yet complete. Call this function again later. \
 *TSS2\_FAPI\_RC\_BAD\_PATH* if a path is used in inappropriate context or contains illegal characters. \
 *TSS2\_FAPI\_RC\_GENERAL\_FAILURE* if an internal error occurred. \
 *TSS2\_FAPI\_RC\_BAD\_VALUE* if an invalid value was passed into the function. \
 *TSS2\_FAPI\_RC\_PATH\_NOT\_FOUND* if a FAPI object path was not found during authorization.

## Author

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