Fapi_GetRandom

NAME

Fapi_GetRandom − Fapi_GetRandom

SYNOPSIS

Functions

TSS2_RC Fapi_GetRandom (FAPI_CONTEXT *context, size_t numBytes, uint8_t **data)
TSS2_RC Fapi_GetRandom_Async (FAPI_CONTEXT *context, size_t numBytes)
TSS2_RC Fapi_GetRandom_Finish (FAPI_CONTEXT *context, uint8_t **data)

Detailed Description

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

Function Documentation

Fapi_GetRandom (FAPI_CONTEXT * context, size_t numBytes, uint8_t ** data)
One-Call function for Fapi_GetRandom

Creates an array with a specified number of bytes. May execute the underlying TPM command multiple times if the requested number of bytes is too big.

Parameters

context The FAPI_CONTEXT
numBytes
The number of bytes requested from the TPM
data
The array of random bytes returned from the TPM

Return values

TSS2_RC_SUCCESS if the function call was a success.
TSS2_FAPI_RC_BAD_REFERENCE
if context or data is NULL.
TSS2_FAPI_RC_BAD_CONTEXT
if context corruption is detected.
TSS2_FAPI_RC_BAD_VALUE
if numBytes is 0.
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_NO_TPM
if FAPI was initialized in no-TPM-mode via its config file.
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_AUTHORIZATION_UNKNOWN
if a required authorization callback is not set.
TSS2_FAPI_RC_AUTHORIZATION_FAILED
if the authorization attempt fails.
TSS2_FAPI_RC_POLICY_UNKNOWN
if policy search for a certain policy digest was not successful.
TSS2_ESYS_RC_*
possible error codes of ESAPI.
TSS2_FAPI_RC_NOT_PROVISIONED
FAPI was not provisioned.
TSS2_FAPI_RC_BAD_PATH
if the path is used in inappropriate context or contains illegal characters.

Fapi_GetRandom_Async (FAPI_CONTEXT * context, size_t numBytes)
Asynchronous function for Fapi_GetRandom

Creates an array with a specified number of bytes. May execute the underlying TPM command multiple times if the requested number of bytes is too big.

Call Fapi_GetRandom_Finish to finish the execution of this command.

Parameters

context The FAPI_CONTEXT
numBytes
The number of bytes requested from the TPM

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_VALUE
if numBytes is 0.
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_NO_TPM
if FAPI was initialized in no-TPM-mode via its config file.
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_FAPI_RC_BAD_PATH
if the path is used in inappropriate context or contains illegal characters.

Fapi_GetRandom_Finish (FAPI_CONTEXT * context, uint8_t ** data)
Asynchronous finish function for Fapi_GetRandom

This function should be called after a previous Fapi_GetRandom_Async.

Parameters

context The FAPI_CONTEXT
data
The array of random bytes returned from the TPM

Return values

TSS2_RC_SUCCESS if the function call was a success.
TSS2_FAPI_RC_BAD_REFERENCE
if context or data 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_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.
TSS2_FAPI_RC_KEY_NOT_FOUND
if a key was not found.
TSS2_FAPI_RC_AUTHORIZATION_UNKNOWN
if a required authorization callback is not set.
TSS2_FAPI_RC_AUTHORIZATION_FAILED
if the authorization attempt fails.
TSS2_FAPI_RC_POLICY_UNKNOWN
if policy search for a certain policy digest was not successful.
TSS2_ESYS_RC_*
possible error codes of ESAPI.
TSS2_FAPI_RC_NOT_PROVISIONED
FAPI was not provisioned.
TSS2_FAPI_RC_BAD_PATH
if the path is used in inappropriate context or contains illegal characters.

Author

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