Revert "adb: Add public key authentification"

This reverts commit f4ed516643ee8ed3a59ad1a8048f7ce5f47f93fb.
diff --git a/adb/adb.c b/adb/adb.c
index 48751d8..f3251fe 100644
--- a/adb/adb.c
+++ b/adb/adb.c
@@ -28,7 +28,6 @@
 
 #include "sysdeps.h"
 #include "adb.h"
-#include "adb_auth.h"
 
 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 
@@ -47,8 +46,6 @@
 
 int HOST = 0;
 
-static int auth_enabled = 0;
-
 #if !ADB_HOST
 static const char *adb_device_banner = "device";
 #endif
@@ -103,7 +100,6 @@
         { "transport", TRACE_TRANSPORT },
         { "jdwp", TRACE_JDWP },
         { "services", TRACE_SERVICES },
-        { "auth", TRACE_AUTH },
         { NULL, 0 }
     };
 
@@ -207,21 +203,19 @@
     free(p);
 }
 
-void handle_online(atransport *t)
+void handle_online(void)
 {
     D("adb: online\n");
-    t->online = 1;
 }
 
 void handle_offline(atransport *t)
 {
     D("adb: offline\n");
     //Close the associated usb
-    t->online = 0;
     run_transport_disconnects(t);
 }
 
-#if DEBUG_PACKETS
+#if TRACE_PACKETS
 #define DUMPMAX 32
 void print_packet(const char *label, apacket *p)
 {
@@ -236,7 +230,6 @@
     case A_OKAY: tag = "OKAY"; break;
     case A_CLSE: tag = "CLSE"; break;
     case A_WRTE: tag = "WRTE"; break;
-    case A_AUTH: tag = "AUTH"; break;
     default: tag = "????"; break;
     }
 
@@ -258,7 +251,7 @@
         }
         x++;
     }
-    fprintf(stderr, "%s", tag);
+    fprintf(stderr, tag);
 }
 #endif
 
@@ -322,70 +315,11 @@
     cp->msg.data_length = fill_connect_data((char *)cp->data,
                                             sizeof(cp->data));
     send_packet(cp, t);
-}
-
-static void send_auth_request(atransport *t)
-{
-    D("Calling send_auth_request\n");
-    apacket *p;
-    int ret;
-
-    ret = adb_auth_generate_token(t->token, sizeof(t->token));
-    if (ret != sizeof(t->token)) {
-        D("Error generating token ret=%d\n", ret);
-        return;
-    }
-
-    p = get_apacket();
-    memcpy(p->data, t->token, ret);
-    p->msg.command = A_AUTH;
-    p->msg.arg0 = ADB_AUTH_TOKEN;
-    p->msg.data_length = ret;
-    send_packet(p, t);
-}
-
-static void send_auth_response(uint8_t *token, size_t token_size, atransport *t)
-{
-    D("Calling send_auth_response\n");
-    apacket *p = get_apacket();
-    int ret;
-
-    ret = adb_auth_sign(t->key, token, token_size, p->data);
-    if (!ret) {
-        D("Error signing the token\n");
-        put_apacket(p);
-        return;
-    }
-
-    p->msg.command = A_AUTH;
-    p->msg.arg0 = ADB_AUTH_SIGNATURE;
-    p->msg.data_length = ret;
-    send_packet(p, t);
-}
-
-static void send_auth_publickey(atransport *t)
-{
-    D("Calling send_auth_publickey\n");
-    apacket *p = get_apacket();
-    int ret;
-
-    ret = adb_auth_get_userkey(p->data, sizeof(p->data));
-    if (!ret) {
-        D("Failed to get user public key\n");
-        put_apacket(p);
-        return;
-    }
-
-    p->msg.command = A_AUTH;
-    p->msg.arg0 = ADB_AUTH_RSAPUBLICKEY;
-    p->msg.data_length = ret;
-    send_packet(p, t);
-}
-
-void adb_auth_verified(atransport *t)
-{
-    handle_online(t);
-    send_connect(t);
+#if ADB_HOST
+        /* XXX why sleep here? */
+    // allow the device some time to respond to the connect message
+    adb_sleep_ms(1000);
+#endif
 }
 
 static char *connection_state_name(atransport *t)
@@ -517,42 +451,13 @@
             t->connection_state = CS_OFFLINE;
             handle_offline(t);
         }
-
         parse_banner((char*) p->data, t);
-
-        if (HOST || !auth_enabled) {
-            handle_online(t);
-            if(!HOST) send_connect(t);
-        } else {
-            send_auth_request(t);
-        }
-        break;
-
-    case A_AUTH:
-        if (p->msg.arg0 == ADB_AUTH_TOKEN) {
-            t->key = adb_auth_nextkey(t->key);
-            if (t->key) {
-                send_auth_response(p->data, p->msg.data_length, t);
-            } else {
-                /* No more private keys to try, send the public key */
-                send_auth_publickey(t);
-            }
-        } else if (p->msg.arg0 == ADB_AUTH_SIGNATURE) {
-            if (adb_auth_verify(t->token, p->data, p->msg.data_length)) {
-                adb_auth_verified(t);
-                t->failed_auth_attempts = 0;
-            } else {
-                if (t->failed_auth_attempts++ > 10)
-                    sleep(1);
-                send_auth_request(t);
-            }
-        } else if (p->msg.arg0 == ADB_AUTH_RSAPUBLICKEY) {
-            adb_auth_confirm_key(p->data, p->msg.data_length, t);
-        }
+        handle_online();
+        if(!HOST) send_connect(t);
         break;
 
     case A_OPEN: /* OPEN(local-id, 0, "destination") */
-        if (t->online) {
+        if(t->connection_state != CS_OFFLINE) {
             char *name = (char*) p->data;
             name[p->msg.data_length > 0 ? p->msg.data_length - 1 : 0] = 0;
             s = create_local_service_socket(name);
@@ -568,7 +473,7 @@
         break;
 
     case A_OKAY: /* READY(local-id, remote-id, "") */
-        if (t->online) {
+        if(t->connection_state != CS_OFFLINE) {
             if((s = find_local_socket(p->msg.arg1))) {
                 if(s->peer == 0) {
                     s->peer = create_remote_socket(p->msg.arg0, t);
@@ -580,7 +485,7 @@
         break;
 
     case A_CLSE: /* CLOSE(local-id, remote-id, "") */
-        if (t->online) {
+        if(t->connection_state != CS_OFFLINE) {
             if((s = find_local_socket(p->msg.arg1))) {
                 s->close(s);
             }
@@ -588,7 +493,7 @@
         break;
 
     case A_WRTE:
-        if (t->online) {
+        if(t->connection_state != CS_OFFLINE) {
             if((s = find_local_socket(p->msg.arg1))) {
                 unsigned rid = p->msg.arg0;
                 p->len = p->msg.data_length;
@@ -1109,7 +1014,6 @@
     usb_vendors_init();
     usb_init();
     local_init(DEFAULT_ADB_LOCAL_TRANSPORT_PORT);
-    adb_auth_init();
 
     char local_name[30];
     build_local_name(local_name, sizeof(local_name), server_port);
@@ -1117,10 +1021,6 @@
         exit(1);
     }
 #else
-    property_get("ro.adb.secure", value, "0");
-    auth_enabled = !strcmp(value, "1");
-    if (auth_enabled)
-        adb_auth_init();
 
     // Our external storage path may be different than apps, since
     // we aren't able to bind mount after dropping root.