lib/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-07-29 11:41:15 +03:00
Code Activity

Enable multiple calls to mbedtls_gcm_update_ad.

Browse Source 
Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
This commit is contained in:
Mateusz Starzyk
2021-05-26 14:25:39 +02:00
parent 17575dcb03
commit bd513bb53d
3 changed files with 40 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
docs/3.0-migration-guide.d/gcm-multipart.md
View File

@ -6,7 +6,6 @@ This changes the interface for applications using the GCM module directly for mu
Applications using one-shot GCM or using GCM via the `mbedtls_cipher_xxx` or `psa_aead_xxx` interfaces do not require any changes.
* `mbedtls_gcm_starts()` now only sets the mode and the nonce (IV). Call the new function `mbedtls_gcm_update_ad()` to pass the associated data.
* The current implementation has a limitation that `mbedtls_gcm_update_ad()` may only be called once. This limitation will be lifted shortly; watch https://github.com/ARMmbed/mbedtls/issues/4351 for updates.
* `mbedtls_gcm_update()` now takes an extra parameter to indicate the actual output length. In Mbed TLS 2.x, applications had to pass inputs consisting of whole 16-byte blocks except for the last block (this limitation has been lifted). In this case:
* As long as the input remains block-aligned, the output length is exactly the input length, as before.
* If the length of the last input is not a multiple of 16, alternative implementations may return the last partial block in the call to `mbedtls_gcm_finish()` instead of returning it in the last call to `mbedtls_gcm_update()`.