PQC KEM implementation

[romanstrobl]

Description

Implement PQC KEM as defined:

• KeyPair MLKEM.generateKeyPair()

  • Generate new Key-Pair for ML-KEM-768 where:
    • Public key is encapsulation key
    • Private key is decapsulation key

• Pair<SecretKey, byte[]> MLKEM.encapsulate(PublicKey encapsulationKey)

  • Generate a shared secret key and ciphertext for decapsulation.

• SecretKey MLKEM.decapsulate(PrivateKey decapsulationKey, byte[] ciphertext)

  • Generate a shared secret key from decapsulation key and the ciphertext.

Cover the new algorithms by tests.

Acceptance criteria

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Technical specification

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QA specification

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JIRA issue code

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