/**
* Generate an identity key pair. Clients should only do this once,
* at install time.
*
* @return the generated IdentityKeyPair.
*/
public static IdentityKeyPair GenerateIdentityKeyPair()
{
ECKeyPair keyPair = Curve.GenerateKeyPair();
IdentityKey publicKey = new IdentityKey(keyPair.GetPublicKey());
return(new IdentityKeyPair(publicKey, keyPair.GetPrivateKey()));
}
public SignedPreKeyRecord(uint id, ulong timestamp, ECKeyPair keyPair, byte[] signature)
{
this.structure = SignedPreKeyRecordStructure.CreateBuilder()
.SetId(id)
.SetPublicKey(ByteString.CopyFrom(keyPair.GetPublicKey().Serialize()))
.SetPrivateKey(ByteString.CopyFrom(keyPair.GetPrivateKey().Serialize()))
.SetSignature(ByteString.CopyFrom(signature))
.SetTimestamp(timestamp)
.Build();
}
public PreKeyRecord(uint id, ECKeyPair keyPair)
{
this.structure = PreKeyRecordStructure.CreateBuilder()
.SetId(id)
.SetPublicKey(ByteString.CopyFrom(keyPair.GetPublicKey()
.Serialize()))
.SetPrivateKey(ByteString.CopyFrom(keyPair.GetPrivateKey()
.Serialize()))
.Build();
}
public void SetSenderChain(ECKeyPair senderRatchetKeyPair, ChainKey chainKey)
{
Chain.Types.ChainKey chainKeyStructure = Chain.Types.ChainKey.CreateBuilder()
.SetKey(ByteString.CopyFrom(chainKey.GetKey()))
.SetIndex(chainKey.GetIndex())
.Build();
Chain senderChain = Chain.CreateBuilder()
.SetSenderRatchetKey(ByteString.CopyFrom(senderRatchetKeyPair.GetPublicKey().Serialize()))
.SetSenderRatchetKeyPrivate(ByteString.CopyFrom(senderRatchetKeyPair.GetPrivateKey().Serialize()))
.SetChainKey(chainKeyStructure)
.Build();
this.sessionStructure = this.sessionStructure.ToBuilder().SetSenderChain(senderChain).Build();
}
public void SetPendingKeyExchange(uint sequence,
ECKeyPair ourBaseKey,
ECKeyPair ourRatchetKey,
IdentityKeyPair ourIdentityKey)
{
PendingKeyExchange structure =
PendingKeyExchange.CreateBuilder()
.SetSequence(sequence)
.SetLocalBaseKey(ByteString.CopyFrom(ourBaseKey.GetPublicKey().Serialize()))
.SetLocalBaseKeyPrivate(ByteString.CopyFrom(ourBaseKey.GetPrivateKey().Serialize()))
.SetLocalRatchetKey(ByteString.CopyFrom(ourRatchetKey.GetPublicKey().Serialize()))
.SetLocalRatchetKeyPrivate(ByteString.CopyFrom(ourRatchetKey.GetPrivateKey().Serialize()))
.SetLocalIdentityKey(ByteString.CopyFrom(ourIdentityKey.GetPublicKey().Serialize()))
.SetLocalIdentityKeyPrivate(ByteString.CopyFrom(ourIdentityKey.GetPrivateKey().Serialize()))
.Build();
this.sessionStructure = this.sessionStructure.ToBuilder()
.SetPendingKeyExchange(structure)
.Build();
}
public SenderKeyState(uint id, uint iteration, byte[] chainKey, ECKeyPair signatureKey)
: this(id, iteration, chainKey, signatureKey.GetPublicKey(), new May <ECPrivateKey>(signatureKey.GetPrivateKey()))
{
}
public Pair <RootKey, ChainKey> CreateChain(ECPublicKey theirRatchetKey, ECKeyPair ourRatchetKey)
{
byte[] sharedSecret = Curve.CalculateAgreement(theirRatchetKey, ourRatchetKey.GetPrivateKey());
byte[] derivedSecretBytes = kdf.DeriveSecrets(sharedSecret, key, Encoding.UTF8.GetBytes("WhisperRatchet"), DerivedRootSecrets.SIZE);
DerivedRootSecrets derivedSecrets = new DerivedRootSecrets(derivedSecretBytes);
RootKey newRootKey = new RootKey(kdf, derivedSecrets.GetRootKey());
ChainKey newChainKey = new ChainKey(kdf, derivedSecrets.GetChainKey(), 0);
return(new Pair <RootKey, ChainKey>(newRootKey, newChainKey));
}