Out-of-Bounds Read in KMC AEAD Encrypt Metadata Parsing via Flawed strtok Pattern

An out-of-bounds heap read vulnerability in cryptography_aead_encrypt() with the same root cause as the cryptography_encrypt() vulnerability - flawed strtok iteration pattern at lines 1336, 1340, and 1344. This is a copy-pasted code pattern that introduces the same bug in the AEAD encrypt function.