improvements

.gitignore

@@ -1,3 +1,5 @@
 node_modules
 *.swp
 npm-debug.log
+build
+.vscode

binding.gyp

@@ -0,0 +1,70 @@
+{
+  "targets": [{
+    "target_name": "signal_crypto",
+    "cflags!": [ "-fno-exceptions" ],
+    "cflags_cc!": [ "-fno-exceptions" ],
+    "sources": [
+      "./native/curve25519-donna.c",
+      "./native/ed25519/additions/compare.c",
+      "./native/ed25519/additions/curve_sigs.c",
+      "./native/ed25519/additions/sign_modified.c",
+      "./native/ed25519/fe_0.c",
+      "./native/ed25519/fe_1.c",
+      "./native/ed25519/fe_add.c",
+      "./native/ed25519/fe_cmov.c",
+      "./native/ed25519/fe_copy.c",
+      "./native/ed25519/fe_frombytes.c",
+      "./native/ed25519/fe_invert.c",
+      "./native/ed25519/fe_isnegative.c",
+      "./native/ed25519/fe_isnonzero.c",
+      "./native/ed25519/fe_mul.c",
+      "./native/ed25519/fe_neg.c",
+      "./native/ed25519/fe_pow22523.c",
+      "./native/ed25519/fe_sq.c",
+      "./native/ed25519/fe_sq2.c",
+      "./native/ed25519/fe_sub.c",
+      "./native/ed25519/fe_tobytes.c",
+      "./native/ed25519/ge_add.c",
+      "./native/ed25519/ge_double_scalarmult.c",
+      "./native/ed25519/ge_frombytes.c",
+      "./native/ed25519/ge_madd.c",
+      "./native/ed25519/ge_msub.c",
+      "./native/ed25519/ge_p1p1_to_p2.c",
+      "./native/ed25519/ge_p1p1_to_p3.c",
+      "./native/ed25519/ge_p2_0.c",
+      "./native/ed25519/ge_p2_dbl.c",
+      "./native/ed25519/ge_p3_0.c",
+      "./native/ed25519/ge_p3_dbl.c",
+      "./native/ed25519/ge_p3_to_cached.c",
+      "./native/ed25519/ge_p3_to_p2.c",
+      "./native/ed25519/ge_p3_tobytes.c",
+      "./native/ed25519/ge_precomp_0.c",
+      "./native/ed25519/ge_scalarmult_base.c",
+      "./native/ed25519/ge_sub.c",
+      "./native/ed25519/ge_tobytes.c",
+      "./native/ed25519/open.c",
+      "./native/ed25519/sc_muladd.c",
+      "./native/ed25519/sc_reduce.c",
+      "./native/ed25519/sign.c",
+      "./native/ed25519/sha512/sha2big.c",
+      "./native/ed25519/sha512/crypto_hash_sha512.c",
+      "./src/crypto_binding.cpp"
+    ],
+    "include_dirs": [
+        "<!(node -p \"require('node-addon-api').include_dir\")",
+        "native/ed25519/nacl_includes",
+        "native/ed25519",
+        "native/ed25519/sha512"
+    ],
+    "defines": [ 
+      "NAPI_DISABLE_CPP_EXCEPTIONS",
+      "SPH_UPTR",
+      "SPH_UNALIGNED",
+      "SPH_BIG_ENDIAN=0",
+      "SPH_LITTLE_ENDIAN=1",
+      "SPH_SPARCV9_GCC_32",
+      "SPH_SMALL_FOOTPRINT=0",
+      "SPH_64"
+    ]
+  }]
+}

index.d.ts

@@ -0,0 +1,55 @@
+interface E2ESession {
+  registrationId: number;
+  identityKey: Uint8Array;
+  signedPreKey: {
+    keyId: number;
+    publicKey: Uint8Array;
+    signature: Uint8Array;
+  };
+  preKey: {
+    keyId: number;
+    publicKey: Uint8Array;
+  };
+}
+
+export interface SignalStorage {
+  loadSession(id: string): Promise<SessionRecord | null | undefined>;
+  storeSession(id: string, session: SessionRecord): Promise<void>;
+  isTrustedIdentity(
+    identifier: string,
+    identityKey: Uint8Array,
+    direction: number
+  ): boolean;
+  loadPreKey(
+    id: number | string
+  ): Promise<{ privKey: Buffer; pubKey: Buffer } | undefined>;
+  removePreKey(id: number): void;
+  loadSignedPreKey(): { privKey: Buffer; pubKey: Buffer };
+  getOurRegistrationId(): Promise<number> | number;
+  getOurIdentity(): { privKey: Buffer; pubKey: Buffer };
+}
+
+export class ProtocolAddress {
+  constructor(name: string, deviceId: number);
+  public id: string;
+  public deviceId: number;
+  public toString(): string;
+}
+
+export class SessionRecord {
+  static deserialize(serialized: Uint8Array): SessionRecord;
+  public serialize(): Uint8Array;
+  public haveOpenSession(): boolean;
+}
+
+export class SessionCipher {
+  constructor(storage: SignalStorage, remoteAddress: ProtocolAddress);
+  public decryptPreKeyWhisperMessage(ciphertext: Uint8Array): Promise<Buffer>;
+  public decryptWhisperMessage(ciphertext: Uint8Array): Promise<Buffer>;
+  public encrypt(data: Uint8Array): Promise<{ type: number; body: string }>;
+}
+
+export class SessionBuilder {
+  constructor(storage: SignalStorage, remoteAddress: ProtocolAddress);
+  public initOutgoing(session: E2ESession): Promise<void>;
+}