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Add comment on exiting early from mbedtls_gcm_update().

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Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
This commit is contained in:
Mateusz Starzyk 2021-06-07 16:03:27 +02:00
parent b45b57eec6
commit 3443bd2570
1 changed files with 3 additions and 1 deletions
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4
library/gcm.c
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@ -454,7 +454,9 @@ int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
*output_length = input_length;
/* Exit early if input_length==0 so that we don't do any pointer arithmetic
* on a potentially null pointer. */
* on a potentially null pointer.
* Returning early also means that the last partial block of AD remains
* untouched for mbedtls_gcm_finish */
if( input_length == 0 )
return( 0 );