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Update documentation for multipart aead operations

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This commit is contained in:
Andrew Thoelke 2019-09-12 00:02:45 +01:00
parent db6f44f875
commit 414415a457
1 changed files with 50 additions and 42 deletions
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92
include/psa/crypto.h
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@ -2239,7 +2239,7 @@ static psa_aead_operation_t psa_aead_operation_init(void);
* listed here.
* -# Initialize the operation object with one of the methods described in the
* documentation for #psa_aead_operation_t, e.g.
* PSA_AEAD_OPERATION_INIT.
* #PSA_AEAD_OPERATION_INIT.
* -# Call psa_aead_encrypt_setup() to specify the algorithm and key.
* -# If needed, call psa_aead_set_lengths() to specify the length of the
* inputs to the subsequent calls to psa_aead_update_ad() and
@ -2255,14 +2255,16 @@ static psa_aead_operation_t psa_aead_operation_init(void);
* of the message to encrypt each time.
* -# Call psa_aead_finish().
*
* The application may call psa_aead_abort() at any time after the operation
* If an error occurs at any step after a call to psa_aead_encrypt_setup(),
* the operation will need to be reset by a call to psa_aead_abort(). The
* application may call psa_aead_abort() at any time after the operation
* has been initialized.
*
* After a successful call to psa_aead_encrypt_setup(), the application must
* eventually terminate the operation. The following events terminate an
* operation:
* - A failed call to any of the \c psa_aead_xxx functions.
* - A call to psa_aead_finish(), psa_aead_verify() or psa_aead_abort().
* - A successful call to psa_aead_finish().
* - A call to psa_aead_abort().
*
* \param[in,out] operation The operation object to set up. It must have
* been initialized as per the documentation for
@ -2277,8 +2279,7 @@ static psa_aead_operation_t psa_aead_operation_init(void);
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (already set up and not
* subsequently completed).
* The operation state is not valid (it must be inactive).
* \retval #PSA_ERROR_INVALID_HANDLE
* \retval #PSA_ERROR_NOT_PERMITTED
* \retval #PSA_ERROR_INVALID_ARGUMENT
@ -2307,7 +2308,7 @@ psa_status_t psa_aead_encrypt_setup(psa_aead_operation_t *operation,
* listed here.
* -# Initialize the operation object with one of the methods described in the
* documentation for #psa_aead_operation_t, e.g.
* PSA_AEAD_OPERATION_INIT.
* #PSA_AEAD_OPERATION_INIT.
* -# Call psa_aead_decrypt_setup() to specify the algorithm and key.
* -# If needed, call psa_aead_set_lengths() to specify the length of the
* inputs to the subsequent calls to psa_aead_update_ad() and
@ -2320,14 +2321,16 @@ psa_status_t psa_aead_encrypt_setup(psa_aead_operation_t *operation,
* of the ciphertext to decrypt each time.
* -# Call psa_aead_verify().
*
* The application may call psa_aead_abort() at any time after the operation
* If an error occurs at any step after a call to psa_aead_decrypt_setup(),
* the operation will need to be reset by a call to psa_aead_abort(). The
* application may call psa_aead_abort() at any time after the operation
* has been initialized.
*
* After a successful call to psa_aead_decrypt_setup(), the application must
* eventually terminate the operation. The following events terminate an
* operation:
* - A failed call to any of the \c psa_aead_xxx functions.
* - A call to psa_aead_finish(), psa_aead_verify() or psa_aead_abort().
* - A successful call to psa_aead_verify().
* - A call to psa_aead_abort().
*
* \param[in,out] operation The operation object to set up. It must have
* been initialized as per the documentation for
@ -2342,8 +2345,7 @@ psa_status_t psa_aead_encrypt_setup(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (already set up and not
* subsequently completed).
* The operation state is not valid (it must be inactive).
* \retval #PSA_ERROR_INVALID_HANDLE
* \retval #PSA_ERROR_NOT_PERMITTED
* \retval #PSA_ERROR_INVALID_ARGUMENT
@ -2373,7 +2375,8 @@ psa_status_t psa_aead_decrypt_setup(psa_aead_operation_t *operation,
* The application must call psa_aead_encrypt_setup() before
* calling this function.
*
* If this function returns an error status, the operation becomes inactive.
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \param[in,out] operation Active AEAD operation.
* \param[out] nonce Buffer where the generated nonce is to be
@ -2385,7 +2388,8 @@ psa_status_t psa_aead_decrypt_setup(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, or nonce already set).
* The operation state is not valid (it must be an active aead encrypt
operation, with no nonce set).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p nonce buffer is too small.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
@ -2408,10 +2412,11 @@ psa_status_t psa_aead_generate_nonce(psa_aead_operation_t *operation,
* This function sets the nonce for the authenticated
* encryption or decryption operation.
*
* The application must call psa_aead_encrypt_setup() before
* calling this function.
* The application must call psa_aead_encrypt_setup() or
* psa_aead_decrypt_setup() before calling this function.
*
* If this function returns an error status, the operation becomes inactive.
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \note When encrypting, applications should use psa_aead_generate_nonce()
* instead of this function, unless implementing a protocol that requires
@ -2424,7 +2429,8 @@ psa_status_t psa_aead_generate_nonce(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, or nonce already set).
* The operation state is not valid (it must be active, with no nonce
* set).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The size of \p nonce is not acceptable for the chosen algorithm.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
@ -2457,6 +2463,9 @@ psa_status_t psa_aead_set_nonce(psa_aead_operation_t *operation,
* this function is not required.
* - For vendor-defined algorithm, refer to the vendor documentation.
*
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \param[in,out] operation Active AEAD operation.
* \param ad_length Size of the non-encrypted additional
* authenticated data in bytes.
@ -2465,8 +2474,8 @@ psa_status_t psa_aead_set_nonce(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, already completed,
* or psa_aead_update_ad() or psa_aead_update() already called).
* The operation state is not valid (it must be active, but before
* psa_aead_update_ad() or psa_aead_update() are called).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* At least one of the lengths is not acceptable for the chosen
* algorithm.
@ -2495,7 +2504,8 @@ psa_status_t psa_aead_set_lengths(psa_aead_operation_t *operation,
* 1. Call either psa_aead_encrypt_setup() or psa_aead_decrypt_setup().
* 2. Set the nonce with psa_aead_generate_nonce() or psa_aead_set_nonce().
*
* If this function returns an error status, the operation becomes inactive.
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \warning When decrypting, until psa_aead_verify() has returned #PSA_SUCCESS,
* there is no guarantee that the input is valid. Therefore, until
@ -2511,8 +2521,8 @@ psa_status_t psa_aead_set_lengths(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, nonce not set,
* psa_aead_update() already called, or operation already completed).
* The operation state is not valid (it must be active and ready to
* receive additional data).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total input length overflows the additional data length that
* was previously specified with psa_aead_set_lengths().
@ -2539,7 +2549,8 @@ psa_status_t psa_aead_update_ad(psa_aead_operation_t *operation,
* 2. Set the nonce with psa_aead_generate_nonce() or psa_aead_set_nonce().
* 3. Call psa_aead_update_ad() to pass all the additional data.
*
* If this function returns an error status, the operation becomes inactive.
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \warning When decrypting, until psa_aead_verify() has returned #PSA_SUCCESS,
* there is no guarantee that the input is valid. Therefore, until
@ -2579,8 +2590,8 @@ psa_status_t psa_aead_update_ad(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, nonce not set
* or already completed).
* The operation state is not valid (it must be active and ready to
* recieve message data).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p output buffer is too small.
* You can determine a sufficient buffer size by calling
@ -2626,7 +2637,9 @@ psa_status_t psa_aead_update(psa_aead_operation_t *operation,
* #PSA_AEAD_TAG_LENGTH(\c alg) where \c alg is the AEAD algorithm
* that the operation performs.
*
* When this function returns, the operation becomes inactive.
* When this function returns successfuly, the operation becomes inactive.
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \param[in,out] operation Active AEAD operation.
* \param[out] ciphertext Buffer where the last part of the ciphertext
@ -2650,8 +2663,8 @@ psa_status_t psa_aead_update(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, nonce not set,
* decryption, or already completed).
* The operation state is not valid (it must be an active aead encrypt
* operation, with all data provided).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p ciphertext or \p tag buffer is too small.
* You can determine a sufficient buffer size for \p ciphertext by
@ -2694,7 +2707,9 @@ psa_status_t psa_aead_finish(psa_aead_operation_t *operation,
* psa_aead_update_ad() with the ciphertext formed by concatenating the
* inputs passed to preceding calls to psa_aead_update().
*
* When this function returns, the operation becomes inactive.
* When this function returns successfuly, the operation becomes inactive.
* If this function returns an error status, the operation enters an error
* state and must be aborted by calling psa_aead_abort().
*
* \param[in,out] operation Active AEAD operation.
* \param[out] plaintext Buffer where the last part of the plaintext
@ -2715,8 +2730,8 @@ psa_status_t psa_aead_finish(psa_aead_operation_t *operation,
* \retval #PSA_SUCCESS
* Success.
* \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, nonce not set,
* encryption, or already completed).
* The operation state is not valid (it must be an active aead decrypt
* operation, with all data provided).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p plaintext buffer is too small.
* You can determine a sufficient buffer size for \p plaintext by
@ -2755,22 +2770,15 @@ psa_status_t psa_aead_verify(psa_aead_operation_t *operation,
* psa_aead_encrypt_setup() or psa_aead_decrypt_setup() again.
*
* You may call this function any time after the operation object has
* been initialized by any of the following methods:
* - A call to psa_aead_encrypt_setup() or psa_aead_decrypt_setup(),
* whether it succeeds or not.
* - Initializing the \c struct to all-bits-zero.
* - Initializing the \c struct to logical zeros, e.g.
* `psa_aead_operation_t operation = {0}`.
* been initialized as described in #psa_aead_operation_t.
*
* In particular, calling psa_aead_abort() after the operation has been
* terminated by a call to psa_aead_abort() or psa_aead_finish()
* is safe and has no effect.
* terminated by a call to psa_aead_abort(), psa_aead_finish() or
* psa_aead_verify() is safe and has no effect.
*
* \param[in,out] operation Initialized AEAD operation.
*
* \retval #PSA_SUCCESS
* \retval #PSA_ERROR_BAD_STATE
* \p operation is not an active AEAD operation.
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE
* \retval #PSA_ERROR_CORRUPTION_DETECTED