import hashlib

def sha256_hash(data):
    return hashlib.sha256(data.encode()).hexdigest()

def generate_sphincs_keypair():
    # Placeholder - will implement real SPHINCS+ later
    return {
        "public_key": "sphincs_public_key_placeholder",
        "private_key": "sphincs_private_key_placeholder" 
    }

def sphincs_sign(message, private_key):
    # Placeholder
    return "sphincs_signature_placeholder"

def sphincs_verify(message, signature, public_key):
    # Placeholder  
    return True
