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namespace Signal {
public class Context {
internal NativeContext native_context;
private RecMutex mutex = RecMutex();
static void locking_function_lock(void* user_data) {
Context ctx = (Context) user_data;
ctx.mutex.lock();
}
static void locking_function_unlock(void* user_data) {
Context ctx = (Context) user_data;
ctx.mutex.unlock();
}
static void stderr_log(LogLevel level, string message, size_t len, void* user_data) {
printerr(@"$level: $message\n");
}
public Context(bool log = false) throws Error {
throw_by_code(NativeContext.create(out native_context, this), "Error initializing native context");
throw_by_code(native_context.set_locking_functions(locking_function_lock, locking_function_unlock), "Error initializing native locking functions");
if (log) native_context.set_log_function(stderr_log);
setup_crypto_provider(native_context);
}
public Store create_store() {
return new Store(this);
}
public void randomize(uint8[] data) throws Error {
throw_by_code(Signal.native_random(data));
}
public SignedPreKeyRecord generate_signed_pre_key(IdentityKeyPair identity_key_pair, int32 id, uint64 timestamp = 0) throws Error {
if (timestamp == 0) timestamp = new DateTime.now_utc().to_unix();
SignedPreKeyRecord res;
throw_by_code(Protocol.KeyHelper.generate_signed_pre_key(out res, identity_key_pair, id, timestamp, native_context));
return res;
}
public Gee.Set<PreKeyRecord> generate_pre_keys(uint start, uint count) throws Error {
Gee.Set<PreKeyRecord> res = new Gee.HashSet<PreKeyRecord>();
for(uint i = start; i < start+count; i++) {
ECKeyPair pair = generate_key_pair();
PreKeyRecord record;
throw_by_code(PreKeyRecord.create(out record, i, pair));
res.add(record);
}
return res;
}
public ECPublicKey decode_public_key(uint8[] bytes) throws Error {
ECPublicKey public_key;
throw_by_code(curve_decode_point(out public_key, bytes, native_context), "Error decoding public key");
return public_key;
}
public ECPrivateKey decode_private_key(uint8[] bytes) throws Error {
ECPrivateKey private_key;
throw_by_code(curve_decode_private_point(out private_key, bytes, native_context), "Error decoding private key");
return private_key;
}
public ECKeyPair generate_key_pair() throws Error {
ECKeyPair key_pair;
throw_by_code(curve_generate_key_pair(native_context, out key_pair), "Error generating key pair");
return key_pair;
}
public uint8[] calculate_signature(ECPrivateKey signing_key, uint8[] message) throws Error {
Buffer signature;
throw_by_code(Curve.calculate_signature(native_context, out signature, signing_key, message), "Error calculating signature");
return signature.data;
}
public SignalMessage deserialize_signal_message(uint8[] data) throws Error {
SignalMessage res;
throw_by_code(signal_message_deserialize(out res, data, native_context));
return res;
}
public SignalMessage copy_signal_message(CiphertextMessage original) throws Error {
SignalMessage res;
throw_by_code(signal_message_copy(out res, (SignalMessage) original, native_context));
return res;
}
public PreKeySignalMessage deserialize_pre_key_signal_message(uint8[] data) throws Error {
PreKeySignalMessage res;
throw_by_code(pre_key_signal_message_deserialize(out res, data, native_context));
return res;
}
public PreKeySignalMessage copy_pre_key_signal_message(CiphertextMessage original) throws Error {
PreKeySignalMessage res;
throw_by_code(pre_key_signal_message_copy(out res, (PreKeySignalMessage) original, native_context));
return res;
}
}
}
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