CASE resumption fails with openssl due to null pointers being used

[bluebin14]

Problem

<what's wrong or missing, please include any applicable:

• CASE resumption fails with openssl due to null pointers being used. The failure is in CASESession::GenerateSigmaResumeMIC at calling AES_CCM_encrypt with null pointers.

Proposed Solution

Use non-zero pointers when calling AES_CCM_encrypt or fix the AES_CCM_encrypt implementation for openssl

[bluebin14]

@pan-apple

[bluebin14]

#10198 fixes the issue for the null source case but not for the null destination case. CASESession::GenerateSigmaResumeMIC calls AES_CCM_encrypt with both plaintext and ciphertext being nullptr and still fails.

[pan-apple]

@bluebin14 , the unit tests are testing that the destination can be nullptr. Are you still seeing the issue when you use it?

[bluebin14]

The unit tests were still using non null destinations.