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--- himddownload-keystuff [2010/07/06 16:29] – megadiscman
+++ himddownload-keystuff [2011/09/04 14:07] (current) – [MAC list authentication] - fixed offset of MCLIST body megadiscman
@@ Line 65: / Line 65: @@
 $ echo $head  | xxd -r -p | retailmac $headkey | xxd -p
 d3dd1a65b26d1f2
-$ # the second half of the ICV is the retail MAC over the MCLIST body (bytes 0x60..0x7d5f)
+$ # the second half of the ICV is the retail MAC over the MCLIST body (bytes 0x70..0x7d6f)
 $ # using bodykey.
 </code>
@@ Line 84: / Line 84: @@
 $ bodykey=`echo $maclist60 | xxd -r -p | openssl enc -d -des-ede -iv 0 -K $rootkey1_12 -nopad | xxd -p`
 $ head=$generation$padding1$ekbid$padding2$discid$padding3
-$ echo $head  | xxd -r -p | xxd
-0000000: 0000 0011 0000 0000 0000 0000 0000 0000  ................
-0000010: 0000 0000 0000 0000 0001 0012 0000 0000  ................
-0000020: 0200 0000 0000 0612 2102 0000 0072 2751  ........!....r'Q
-0000030: 0000 0000 0000 0000 0000 0000 0000 0000  ................
 $ # this prints the first half of the ICV
 $ echo $head  | xxd -r -p | retailmac $headkey | xxd -p
@@ Line 94: / Line 89: @@
 </code>
-===== Track MAC =====
+===== Track encryption =====
-added later.
+The track key-encryption-key (KEK) is stored encrypted by the EKB root key
+<code>
+$ rootkey1_12=f51ecb2a808f15fd542ef5123bcdbca4
+$ # calculate track key-encryption-key
+$ enctrackkey=d7c9cadc12b9ad99
+$ trackkey=`echo $enctrackkey | xxd -r -p | openssl enc -d -des-ede -iv 0 -K $rootkey1_12 -nopad | xxd -p`
+$ echo $trackkey
+e8ab6c3c32c35eb
+$ # calculate MAC
+$ contentid=010f50000004000000b792f6f9318c20fff1aad8
+$ trkentry="0001010000000000 $contentid 0000000000000000 01004400"
+$ mackey=`echo 0000000000000000 | xxd -r -p | openssl enc -des -iv 0 -K $trackkey -nopad | xxd -p`
+$ echo $trkentry | xxd -r -p | openssl enc -des-cbc -iv 0 -K $mackey -nopad | tail -c 8  | xxd -p
+f35336c5818d22b
+</code>