func NewAgent(agentID []byte, accessKey *security.ManagedKey) (*Agent, error) {
if accessKey.Encrypted() {
return nil, security.ErrKeyMustBeDecrypted
}
iv := make([]byte, accessKey.KeySize())
if _, err := rand.Read(iv); err != nil {
return nil, err
}
if agentID == nil {
agentID = make([]byte, AgentIDSize)
if _, err := rand.Read(agentID); err != nil {
return nil, err
}
}
var (
mac [16]byte
key [32]byte
)
copy(key[:], accessKey.Plaintext)
poly1305.Sum(&mac, iv, &key)
agent := &Agent{
ID: agentID,
IV: iv,
MAC: mac[:],
Created: time.Now(),
}
return agent, nil
}
