From 42a6ac838fe5ca40f9727a2808d458e1c9a92384 Mon Sep 17 00:00:00 2001
From: fduncanh <fduncanh@gmail.com>
Date: Fri, 17 Dec 2021 14:25:03 -0500
Subject: [PATCH] add tests for examining audio decryption

---
 lib/global.h      |  2 ++
 lib/raop_buffer.c | 11 ++++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/global.h b/lib/global.h
index 7d32757..af38e24 100755
--- a/lib/global.h
+++ b/lib/global.h
@@ -10,6 +10,8 @@
 #define OLD_PROTOCOL_AUDIO_CLIENT_LIST "AirMyPC/2.0;xxx"
 #define OLD_PROTOCOL_VIDEO_CLIENT_LIST "AirMyPC/2.0;xxx"
 
+#define DECRYPTION_TEST 0
+
 #define MAX_HWADDR_LEN 6
 
 #endif
diff --git a/lib/raop_buffer.c b/lib/raop_buffer.c
index fc0f890..8181c46 100755
--- a/lib/raop_buffer.c
+++ b/lib/raop_buffer.c
@@ -26,6 +26,8 @@
 #include "crypto.h"
 #include "compat.h"
 #include "stream.h"
+#include "global.h"
+#include "utils.h"
 
 #define RAOP_BUFFER_LENGTH 32
 
@@ -149,6 +151,10 @@ raop_buffer_decrypt(raop_buffer_t *raop_buffer, unsigned char *data, unsigned ch
     }
 #endif
 
+    if (DECRYPTION_TEST) {
+      printf("%s\n", OLD_PROTOCOL_AUDIO_CLIENT_LIST);
+      printf("%d before %s", payload_size, utils_data_to_string(&data[12],16,16 ));
+    }
     encryptedlen = payload_size / 16*16;
     memset(output, 0, payload_size);
     // Need to be initialized internally
@@ -158,7 +164,10 @@ raop_buffer_decrypt(raop_buffer_t *raop_buffer, unsigned char *data, unsigned ch
 
     memcpy(output + encryptedlen, &data[12 + encryptedlen], payload_size - encryptedlen);
     *outputlen = payload_size;
-
+    if (DECRYPTION_TEST){
+      if ( !(output[0] == 0x8d || output[0] == 0x8e || output[0] == 0x20)) printf("***ERROR AUDIO FRAME  IS NOT AAC_ELD OR ALAC\n"); 
+      printf("%d after  %s\n", payload_size, utils_data_to_string(output,16,16 ));
+    }
 #ifdef DUMP_AUDIO
     // Decrypted file
     if (file_aac != NULL) {