Cryptographic Functions

We provide implementations of several cryptographic algorithms that you can use in your implementation.

These utilities are defined in userlib, which is already imported into client.go.

You cannot use any external cryptography libraries. The autograder will refuse external libraries except those given in client.go (see Autograded Code).

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Table of contents

• 6.1. Public Key Encryption
• 6.2. Digital Signatures
• 6.3. Hash Function
• 6.4. Hash-Based Message Authentication Code (HMAC)
• 6.5. Hash-Based Key Derivation Function (HashKDF)
• 6.6. Password-Based Key Derivation Function (PBKDF)
• 6.7. Symmetric Encryption
• 6.8. Random Byte Generator