diff --git a/src/devtools/adb_tcp/adb_auth.h b/src/devtools/adb_tcp/adb_auth.h
new file mode 100644
index 0000000..b24c674
--- /dev/null
+++ b/src/devtools/adb_tcp/adb_auth.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __ADB_AUTH_H
+#define __ADB_AUTH_H
+
+void adb_auth_init(void);
+void adb_auth_verified(atransport *t);
+
+void send_auth_request(atransport *t);
+
+/* AUTH packets first argument */
+/* Request */
+#define ADB_AUTH_TOKEN         1
+/* Response */
+#define ADB_AUTH_SIGNATURE     2
+#define ADB_AUTH_RSAPUBLICKEY  3
+
+#if ADB_HOST
+
+int adb_auth_sign(void *key, void *token, size_t token_size, void *sig);
+void *adb_auth_nextkey(void *current);
+int adb_auth_get_userkey(unsigned char *data, size_t len);
+
+static inline int adb_auth_generate_token(void *token, size_t token_size) { return 0; }
+static inline int adb_auth_verify(void *token, void *sig, int siglen) { return 0; }
+static inline void adb_auth_confirm_key(unsigned char *data, size_t len, atransport *t) { }
+
+#else // !ADB_HOST
+
+static inline int adb_auth_sign(void* key, void *token, size_t token_size, void *sig) { return 0; }
+static inline void *adb_auth_nextkey(void *current) { return NULL; }
+static inline int adb_auth_get_userkey(unsigned char *data, size_t len) { return 0; }
+
+int adb_auth_generate_token(void *token, size_t token_size);
+int adb_auth_verify(void *token, void *sig, int siglen);
+void adb_auth_confirm_key(unsigned char *data, size_t len, atransport *t);
+
+#endif // ADB_HOST
+
+#endif // __ADB_AUTH_H