Fapi_Decrypt - Man Page

Synopsis

Functions

TSS2_RC Fapi_Decrypt (FAPI_CONTEXT *context, char const *keyPath, uint8_t const *cipherText, size_t cipherTextSize, uint8_t **plainText, size_t *plainTextSize)
TSS2_RC Fapi_Decrypt_Async (FAPI_CONTEXT *context, char const *keyPath, uint8_t const *cipherText, size_t cipherTextSize)
TSS2_RC Fapi_Decrypt_Finish (FAPI_CONTEXT *context, uint8_t **plainText, size_t *plainTextSize)

Detailed Description

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

Function Documentation

TSS2_RC Fapi_Decrypt (FAPI_CONTEXT * context, char const * keyPath, uint8_t const * cipherText, size_t cipherTextSize, uint8_t ** plainText, size_t * plainTextSize)

One-Call function for Fapi_Decrypt

Decrypts data that was previously encrypted with Fapi_Encrypt.

Parameters

context The FAPI_CONTEXT
keyPath The decryption key.
cipherText The ciphertext to decrypt.
cipherTextSize The size of the ciphertext to decrypt.
plainText the decrypted ciphertext. May be NULL (callee-allocated)
plainTextSize The size of the ciphertext in bytes. May be NULL

Return values

TSS2_RC_SUCCESS if the function call was a success.
TSS2_FAPI_RC_BAD_REFERENCE if context or cipherText is NULL.
TSS2_FAPI_RC_BAD_CONTEXT if context corruption is detected.
TSS2_FAPI_RC_KEY_NOT_FOUND if can’t find the key necessary to decrypt the file.
TSS2_FAPI_RC_BAD_KEY if the decryption key is unsuitable for the requested operation.
TSS2_FAPI_RC_BAD_VALUE if the decryption fails
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_GENERAL_FAILURE if an internal error occurred.
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_PATH_NOT_FOUND if a FAPI object path was not found during authorization.
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.

TSS2_RC Fapi_Decrypt_Async (FAPI_CONTEXT * context, char const * keyPath, uint8_t const * cipherText, size_t cipherTextSize)

Asynchronous function for Fapi_Decrypt

Decrypts data that was previously encrypted with Fapi_Encrypt.

Call Fapi_Decrypt_Finish to finish the execution of this command.

Parameters

context The FAPI_CONTEXT
keyPath The decryption key.
cipherText The ciphertext to decrypt
cipherTextSize The size of the ciphertext to decrypt

Return values

TSS2_RC_SUCCESS if the function call was a success.
TSS2_FAPI_RC_BAD_REFERENCE if context or cipherText is NULL.
TSS2_FAPI_RC_BAD_CONTEXT if context corruption is detected.
TSS2_FAPI_RC_KEY_NOT_FOUND if can’t find the key necessary to decrypt the file.
TSS2_FAPI_RC_BAD_KEY if the decryption key is unsuitable for the requested operation.
TSS2_FAPI_RC_BAD_VALUE if the decryption fails
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_RC Fapi_Decrypt_Finish (FAPI_CONTEXT * context, uint8_t ** plainText, size_t * plainTextSize)

Asynchronous finish function for Fapi_Decrypt

This function should be called after a previous Fapi_Decrypt.

Parameters

context The FAPI_CONTEXT
plainText the decrypted ciphertext. May be NULL (callee-allocated)
plainTextSize The size of the ciphertext in bytes. May be NULL

Return values

TSS2_RC_SUCCESS if the function call was a success.
TSS2_FAPI_RC_BAD_REFERENCE if context, plainText or plainTextSize 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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Info

Wed Jan 27 2021 Version 3.0.3 tpm2-tss