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Doc only: Add psa_aead_set_lengths() for the sake of CCM

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This commit is contained in:
Gilles Peskine 2019-01-17 15:26:08 +01:00
parent a05602d100
commit bc59c855c4
1 changed files with 72 additions and 0 deletions
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72
include/psa/crypto.h
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@ -1974,6 +1974,10 @@ static psa_aead_operation_t psa_aead_operation_init(void);
* documentation for #psa_aead_operation_t, e.g. * 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. * -# 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
* psa_aead_update(). See the documentation of psa_aead_set_lengths()
* for details.
* -# Call either psa_aead_generate_nonce() or psa_aead_set_nonce() to * -# Call either psa_aead_generate_nonce() or psa_aead_set_nonce() to
* generate or set the nonce. You should use * generate or set the nonce. You should use
* psa_aead_generate_nonce() unless the protocol you are implementing * psa_aead_generate_nonce() unless the protocol you are implementing
@ -2035,6 +2039,10 @@ psa_status_t psa_aead_encrypt_setup(psa_aead_operation_t *operation,
* documentation for #psa_aead_operation_t, e.g. * 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. * -# 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
* psa_aead_update(). See the documentation of psa_aead_set_lengths()
* for details.
* -# Call psa_aead_set_nonce() with the nonce for the decryption. * -# Call psa_aead_set_nonce() with the nonce for the decryption.
* -# Call psa_aead_update_ad() zero, one or more times, passing a fragment * -# Call psa_aead_update_ad() zero, one or more times, passing a fragment
* of the non-encrypted additional authenticated data each time. * of the non-encrypted additional authenticated data each time.
@ -2150,6 +2158,44 @@ psa_status_t psa_aead_set_nonce(psa_aead_operation_t *operation,
const unsigned char *nonce, const unsigned char *nonce,
size_t nonce_length); size_t nonce_length);
/** Declare the lengths of the message and additional data for AEAD.
*
* The application must call this function before calling
* psa_aead_update_ad() or psa_aead_update() if the algorithm for
* the operation requires it. If the algorithm does not require it,
* calling this function is optional, but if this function is called
* then the implementation must enforce the lengths.
*
* You may call this function before or after setting the nonce with
* psa_aead_set_nonce() or psa_aead_generate_nonce().
*
* - For #PSA_ALG_CCM, calling this function is required.
* - For the other AEAD algorithms defined in this specification, calling
* this function is not required.
* - For vendor-defined algorithm, refer to the vendor documentation.
*
* \param[in,out] operation Active AEAD operation.
* \param ad_length Size of the non-encrypted additional
* authenticated data in bytes.
* \param plaintext_length Size of the plaintext to encrypt in bytes.
*
* \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).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* At least one of the lengths is not acceptable for the chosen
* algorithm.
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE
* \retval #PSA_ERROR_TAMPERING_DETECTED
*/
psa_status_t psa_aead_set_lengths(psa_aead_operation_t *operation,
size_t ad_length,
size_t plaintext_length);
/** Pass additional data to an active AEAD operation. /** Pass additional data to an active AEAD operation.
* *
* Additional data is authenticated, but not encrypted. * Additional data is authenticated, but not encrypted.
@ -2180,6 +2226,9 @@ psa_status_t psa_aead_set_nonce(psa_aead_operation_t *operation,
* \retval #PSA_ERROR_BAD_STATE * \retval #PSA_ERROR_BAD_STATE
* The operation state is not valid (not set up, nonce not set, * The operation state is not valid (not set up, nonce not set,
* psa_aead_update() already called, or operation already completed). * psa_aead_update() already called, or operation already completed).
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total input length overflows the additional data length that
* was previously specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE * \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE * \retval #PSA_ERROR_HARDWARE_FAILURE
@ -2230,6 +2279,13 @@ psa_status_t psa_aead_update_ad(psa_aead_operation_t *operation,
* or already completed). * or already completed).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL * \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p output buffer is too small. * The size of the \p output buffer is too small.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total length of input to psa_aead_update_ad() so far is
* less than the additional data length that was previously
* specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total input length overflows the plaintext length that
* was previously specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE * \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE * \retval #PSA_ERROR_HARDWARE_FAILURE
@ -2281,6 +2337,14 @@ psa_status_t psa_aead_update(psa_aead_operation_t *operation,
* decryption, or already completed). * decryption, or already completed).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL * \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p output buffer is too small. * The size of the \p output buffer is too small.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total length of input to psa_aead_update_ad() so far is
* less than the additional data length that was previously
* specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total length of input to psa_aead_update() so far is
* less than the plaintext length that was previously
* specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE * \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE * \retval #PSA_ERROR_HARDWARE_FAILURE
@ -2316,6 +2380,14 @@ psa_status_t psa_aead_finish(psa_aead_operation_t *operation,
* encryption, or already completed). * encryption, or already completed).
* \retval #PSA_ERROR_BUFFER_TOO_SMALL * \retval #PSA_ERROR_BUFFER_TOO_SMALL
* The size of the \p output buffer is too small. * The size of the \p output buffer is too small.
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total length of input to psa_aead_update_ad() so far is
* less than the additional data length that was previously
* specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INVALID_ARGUMENT
* The total length of input to psa_aead_update() so far is
* less than the plaintext length that was previously
* specified with psa_aead_set_lengths().
* \retval #PSA_ERROR_INSUFFICIENT_MEMORY * \retval #PSA_ERROR_INSUFFICIENT_MEMORY
* \retval #PSA_ERROR_COMMUNICATION_FAILURE * \retval #PSA_ERROR_COMMUNICATION_FAILURE
* \retval #PSA_ERROR_HARDWARE_FAILURE * \retval #PSA_ERROR_HARDWARE_FAILURE