namespace Signal { [CCode (cname = "int", cprefix = "SG_ERR_", cheader_filename = "signal_protocol.h", has_type_id = false)] public enum ErrorCode { [CCode (cname = "SG_SUCCESS")] SUCCESS, NOMEM, INVAL, UNKNOWN, DUPLICATE_MESSAGE, INVALID_KEY, INVALID_KEY_ID, INVALID_MAC, INVALID_MESSAGE, INVALID_VERSION, LEGACY_MESSAGE, NO_SESSION, STALE_KEY_EXCHANGE, UNTRUSTED_IDENTITY, VRF_SIG_VERIF_FAILED, INVALID_PROTO_BUF, FP_VERSION_MISMATCH, FP_IDENT_MISMATCH; } [CCode (cname = "SG_ERR_MINIMUM", cheader_filename = "signal_protocol.h")] public const int MIN_ERROR_CODE; [CCode (cname = "int", cprefix = "SG_LOG_", cheader_filename = "signal_protocol.h", has_type_id = false)] public enum LogLevel { ERROR, WARNING, NOTICE, INFO, DEBUG } [CCode (cname = "signal_throw_gerror_by_code_", cheader_filename = "signal_protocol.h")] private int throw_by_code(int code, string? message = null) throws GLib.Error { if (code < 0 && code > MIN_ERROR_CODE) { throw new GLib.Error(-1, code, "%s: %s", message ?? "Signal error", ((ErrorCode)code).to_string()); } return code; } [CCode (cname = "int", cprefix = "SG_CIPHER_", cheader_filename = "signal_protocol.h", has_type_id = false)] public enum Cipher { AES_CTR_NOPADDING, AES_CBC_PKCS5, AES_GCM_NOPADDING } [Compact] [CCode (cname = "signal_type_base", ref_function="signal_type_ref_vapi", unref_function="signal_type_unref_vapi", cheader_filename="signal_protocol_types.h,signal_helper.h")] public class TypeBase { } [Compact] [CCode (cname = "signal_buffer", cheader_filename = "signal_protocol_types.h", free_function="signal_buffer_free")] public class Buffer { [CCode (cname = "signal_buffer_alloc")] public Buffer(size_t len); [CCode (cname = "signal_buffer_create")] public Buffer.from(uint8[] data); public Buffer copy(); public Buffer append(uint8[] data); public int compare(Buffer other); public uint8 get(int i) { return data[i]; } public void set(int i, uint8 val) { data[i] = val; } public uint8[] data { get { int x = (int)len(); unowned uint8[] res = _data(); res.length = x; return res; } } [CCode (array_length = false, cname = "signal_buffer_data")] private unowned uint8[] _data(); private size_t len(); } [Compact] [CCode (cname = "signal_int_list", cheader_filename = "signal_protocol_types.h", free_function="signal_int_list_free")] public class IntList { [CCode (cname = "signal_int_list_alloc")] public IntList(); [CCode (cname = "signal_int_list_push_back")] public int add(int value); public uint size { [CCode (cname = "signal_int_list_size")] get; } [CCode (cname = "signal_int_list_at")] public int get(uint index); } [Compact] [CCode (cname = "session_builder", cprefix = "session_builder_", free_function="session_builder_free", cheader_filename = "session_builder.h")] public class SessionBuilder { [CCode (cname = "session_builder_process_pre_key_bundle")] private int process_pre_key_bundle_(PreKeyBundle pre_key_bundle); [CCode (cname = "session_builder_process_pre_key_bundle_")] public void process_pre_key_bundle(PreKeyBundle pre_key_bundle) throws GLib.Error { throw_by_code(process_pre_key_bundle_(pre_key_bundle)); } } [Compact] [CCode (cname = "session_pre_key_bundle", cprefix = "session_pre_key_bundle_", cheader_filename = "session_pre_key.h")] public class PreKeyBundle : TypeBase { public static int create(out PreKeyBundle bundle, uint32 registration_id, int device_id, uint32 pre_key_id, ECPublicKey? pre_key_public, uint32 signed_pre_key_id, ECPublicKey? signed_pre_key_public, uint8[]? signed_pre_key_signature, ECPublicKey? identity_key); public uint32 registration_id { get; } public int device_id { get; } public uint32 pre_key_id { get; } public ECPublicKey pre_key { owned get; } public uint32 signed_pre_key_id { get; } public ECPublicKey signed_pre_key { owned get; } public Buffer signed_pre_key_signature { owned get; } public ECPublicKey identity_key { owned get; } } [Compact] [CCode (cname = "session_pre_key", cprefix = "session_pre_key_", cheader_filename = "session_pre_key.h,signal_helper.h")] public class PreKeyRecord : TypeBase { public PreKeyRecord(uint32 id, ECKeyPair key_pair) throws GLib.Error { int err; this.new(id, key_pair, out err); throw_by_code(err); } [CCode (cheader_filename = "signal_helper.h")] private PreKeyRecord.new(uint32 id, ECKeyPair key_pair, out int err); private static int create(out PreKeyRecord pre_key, uint32 id, ECKeyPair key_pair); //public static int deserialize(out PreKeyRecord pre_key, uint8[] data, NativeContext global_context); [CCode (instance_pos = 2)] public int serialze(out Buffer buffer); public uint32 id { get; } public ECKeyPair key_pair { get; } } [Compact] [CCode (cname = "session_record", cprefix = "session_record_", cheader_filename = "signal_protocol_types.h")] public class SessionRecord : TypeBase { public SessionState state { get; } } [Compact] [CCode (cname = "session_state", cprefix = "session_state_", cheader_filename = "session_state.h")] public class SessionState : TypeBase { //public static int create(out SessionState state, NativeContext context); //public static int deserialize(out SessionState state, uint8[] data, NativeContext context); //public static int copy(out SessionState state, SessionState other_state, NativeContext context); [CCode (instance_pos = 2)] public int serialze(out Buffer buffer); public uint32 session_version { get; set; } public ECPublicKey local_identity_key { get; set; } public ECPublicKey remote_identity_key { get; set; } //public Ratchet.RootKey root_key { get; set; } public uint32 previous_counter { get; set; } public ECPublicKey sender_ratchet_key { get; } public ECKeyPair sender_ratchet_key_pair { get; } //public Ratchet.ChainKey sender_chain_key { get; set; } public uint32 remote_registration_id { get; set; } public uint32 local_registration_id { get; set; } public int needs_refresh { get; set; } public ECPublicKey alice_base_key { get; set; } } [Compact] [CCode (cname = "session_signed_pre_key", cprefix = "session_signed_pre_key_", cheader_filename = "session_pre_key.h")] public class SignedPreKeyRecord : TypeBase { public SignedPreKeyRecord(uint32 id, uint64 timestamp, ECKeyPair key_pair, uint8[] signature) throws GLib.Error { int err; this.new(id, timestamp, key_pair, signature, out err); throw_by_code(err); } [CCode (cheader_filename = "signal_helper.h")] private SignedPreKeyRecord.new(uint32 id, uint64 timestamp, ECKeyPair key_pair, uint8[] signature, out int err); private static int create(out SignedPreKeyRecord pre_key, uint32 id, uint64 timestamp, ECKeyPair key_pair, uint8[] signature); [CCode (instance_pos = 2)] public int serialze(out Buffer buffer); public uint32 id { get; } public uint64 timestamp { get; } public ECKeyPair key_pair { get; } public uint8[] signature { [CCode (cname = "session_signed_pre_key_get_signature_")] get { int x = (int)get_signature_len(); unowned uint8[] res = get_signature(); res.length = x; return res; } } [CCode (array_length = false, cname = "session_signed_pre_key_get_signature")] private unowned uint8[] get_signature(); private size_t get_signature_len(); } /** * Address of an Signal Protocol message recipient */ [Compact] [CCode (cname = "signal_protocol_address", cprefix = "signal_protocol_address_", cheader_filename = "signal_protocol.h,signal_helper.h")] public class Address { public Address(string name, int32 device_id); public int32 device_id { get; set; } public string name { owned get; set; } } /** * A representation of a (group + sender + device) tuple */ [Compact] [CCode (cname = "signal_protocol_sender_key_name")] public class SenderKeyName { [CCode (cname = "group_id", array_length_cname="group_id_len")] private char* group_id_; private size_t group_id_len; public Address sender; } [Compact] [CCode (cname = "ec_public_key", cprefix = "ec_public_key_", cheader_filename = "curve.h,signal_helper.h")] public class ECPublicKey : TypeBase { [CCode (cname = "curve_generate_public_key")] public static int generate(out ECPublicKey public_key, ECPrivateKey private_key); [CCode (instance_pos = 1, cname = "ec_public_key_serialize")] private int serialize_([CCode (pos = 0)] out Buffer buffer); [CCode (cname = "ec_public_key_serialize_")] public uint8[] serialize() throws GLib.Error { Buffer buffer; throw_by_code(serialize_(out buffer)); return buffer.data; } public int compare(ECPublicKey other); public int memcmp(ECPublicKey other); } [Compact] [CCode (cname = "ec_private_key", cprefix = "ec_private_key_", cheader_filename = "curve.h,signal_helper.h")] public class ECPrivateKey : TypeBase { [CCode (instance_pos = 1, cname = "ec_private_key_serialize")] private int serialize_([CCode (pos = 0)] out Buffer buffer); [CCode (cname = "ec_private_key_serialize_")] public uint8[] serialize() throws GLib.Error { Buffer buffer; throw_by_code(serialize_(out buffer)); return buffer.data; } public int compare(ECPublicKey other); } [Compact] [CCode (cname = "ec_key_pair", cprefix="ec_key_pair_", cheader_filename = "curve.h,signal_helper.h")] public class ECKeyPair : TypeBase { public static int create(out ECKeyPair key_pair, ECPublicKey public_key, ECPrivateKey private_key); public ECPublicKey public { get; } public ECPrivateKey private { get; } } [CCode (cname = "ratchet_message_keys", cheader_filename = "ratchet.h")] public class MessageKeys { } [Compact] [CCode (cname = "ratchet_identity_key_pair", cprefix = "ratchet_identity_key_pair_", cheader_filename = "ratchet.h,signal_helper.h")] public class IdentityKeyPair : TypeBase { public static int create(out IdentityKeyPair key_pair, ECPublicKey public_key, ECPrivateKey private_key); public int serialze(out Buffer buffer); public ECPublicKey public { get; } public ECPrivateKey private { get; } } [Compact] [CCode (cname = "ec_public_key_list")] public class PublicKeyList {} /** * The main entry point for Signal Protocol encrypt/decrypt operations. * * Once a session has been established with session_builder, * this class can be used for all encrypt/decrypt operations within * that session. */ [Compact] [CCode (cname = "session_cipher", cprefix = "session_cipher_", cheader_filename = "session_cipher.h", free_function = "session_cipher_free")] public class SessionCipher { public void* user_data { get; set; } public DecryptionCallback decryption_callback { set; } [CCode (cname = "session_cipher_encrypt")] private int encrypt_(uint8[] padded_message, out CiphertextMessage encrypted_message); [CCode (cname = "session_cipher_encrypt_")] public CiphertextMessage encrypt(uint8[] padded_message) throws GLib.Error { CiphertextMessage res; throw_by_code(encrypt_(padded_message, out res)); return res; } [CCode (cname = "session_cipher_decrypt_pre_key_signal_message")] private int decrypt_pre_key_signal_message_(PreKeySignalMessage ciphertext, void* decrypt_context, out Buffer plaintext); [CCode (cname = "session_cipher_decrypt_pre_key_signal_message_")] public uint8[] decrypt_pre_key_signal_message(PreKeySignalMessage ciphertext, void* decrypt_context = null) throws GLib.Error { Buffer res; throw_by_code(decrypt_pre_key_signal_message_(ciphertext, decrypt_context, out res)); return res.data; } [CCode (cname = "session_cipher_decrypt_signal_message")] private int decrypt_signal_message_(SignalMessage ciphertext, void* decrypt_context, out Buffer plaintext); [CCode (cname = "session_cipher_decrypt_signal_message_")] public uint8[] decrypt_signal_message(SignalMessage ciphertext, void* decrypt_context = null) throws GLib.Error { Buffer res; throw_by_code(decrypt_signal_message_(ciphertext, decrypt_context, out res)); return res.data; } public int get_remote_registration_id(out uint32 remote_id); public int get_session_version(uint32 version); [CCode (has_target = false)] public delegate int DecryptionCallback(SessionCipher cipher, Buffer plaintext, void* decrypt_context); } [CCode (cname = "int", cheader_filename = "protocol.h", has_type_id = false)] public enum CiphertextType { [CCode (cname = "CIPHERTEXT_SIGNAL_TYPE")] SIGNAL, [CCode (cname = "CIPHERTEXT_PREKEY_TYPE")] PREKEY, [CCode (cname = "CIPHERTEXT_SENDERKEY_TYPE")] SENDERKEY, [CCode (cname = "CIPHERTEXT_SENDERKEY_DISTRIBUTION_TYPE")] SENDERKEY_DISTRIBUTION } [Compact] [CCode (cname = "ciphertext_message", cprefix = "ciphertext_message_", cheader_filename = "protocol.h,signal_helper.h")] public abstract class CiphertextMessage : TypeBase { public CiphertextType type { get; } [CCode (cname = "ciphertext_message_get_serialized")] private unowned Buffer get_serialized_(); public uint8[] serialized { [CCode (cname = "ciphertext_message_get_serialized_")] get { return get_serialized_().data; }} } [Compact] [CCode (cname = "signal_message", cprefix = "signal_message_", cheader_filename = "protocol.h,signal_helper.h")] public class SignalMessage : CiphertextMessage { public ECPublicKey sender_ratchet_key { get; } public uint8 message_version { get; } public uint32 counter { get; } public Buffer body { get; } //public int verify_mac(uint8 message_version, ECPublicKey sender_identity_key, ECPublicKey receiver_identity_key, uint8[] mac, NativeContext global_context); public static int is_legacy(uint8[] data); } [Compact] [CCode (cname = "pre_key_signal_message", cprefix = "pre_key_signal_message_", cheader_filename = "protocol.h,signal_helper.h")] public class PreKeySignalMessage : CiphertextMessage { public uint8 message_version { get; } public ECPublicKey identity_key { get; } public uint32 registration_id { get; } public uint32 pre_key_id { get; } public uint32 signed_pre_key_id { get; } public ECPublicKey base_key { get; } public SignalMessage signal_message { get; } } [Compact] [CCode (cname = "sender_key_message", cprefix = "sender_key_message_", cheader_filename = "protocol.h,signal_helper.h")] public class SenderKeyMessage : CiphertextMessage { public uint32 key_id { get; } public uint32 iteration { get; } public Buffer ciphertext { get; } } [Compact] [CCode (cname = "sender_key_distribution_message", cprefix = "sender_key_distribution_message_", cheader_filename = "protocol.h,signal_helper.h")] public class SenderKeyDistributionMessage : CiphertextMessage { public uint32 id { get; } public uint32 iteration { get; } public Buffer chain_key { get; } public ECPublicKey signature_key { get; } } [CCode (cname = "signal_vala_encrypt", cheader_filename = "signal_helper.h")] private static int aes_encrypt_(out Buffer output, int cipher, uint8[] key, uint8[] iv, uint8[] plaintext, void *user_data); [CCode (cname = "signal_vala_encrypt_")] public uint8[] aes_encrypt(int cipher, uint8[] key, uint8[] iv, uint8[] plaintext) throws GLib.Error { Buffer buf; throw_by_code(aes_encrypt_(out buf, cipher, key, iv, plaintext, null)); return buf.data; } [CCode (cname = "signal_vala_decrypt", cheader_filename = "signal_helper.h")] private static int aes_decrypt_(out Buffer output, int cipher, uint8[] key, uint8[] iv, uint8[] ciphertext, void *user_data); [CCode (cname = "signal_vala_decrypt_")] public uint8[] aes_decrypt(int cipher, uint8[] key, uint8[] iv, uint8[] ciphertext) throws GLib.Error { Buffer buf; throw_by_code(aes_decrypt_(out buf, cipher, key, iv, ciphertext, null)); return buf.data; } }