From 81862b26c97a0e7993763a6520421d75c3da6866 Mon Sep 17 00:00:00 2001 From: Unlock Music Dev Date: Sun, 20 Nov 2022 07:53:36 +0800 Subject: [PATCH] feat(ximalaya): initial support --- algo/ximalaya/x2m_crypto.go | 34 ++++++++++++++++ algo/ximalaya/x2m_scramble_table.bin | Bin 0 -> 2048 bytes algo/ximalaya/x3m_crypto.go | 40 +++++++++++++++++++ algo/ximalaya/x3m_scramble_table.bin | Bin 0 -> 2048 bytes algo/ximalaya/ximalaya.go | 56 ++++++++++++++++++++++++++ cmd/um/main.go | 1 + go.mod | 3 +- go.sum | 57 +-------------------------- 8 files changed, 135 insertions(+), 56 deletions(-) create mode 100644 algo/ximalaya/x2m_crypto.go create mode 100644 algo/ximalaya/x2m_scramble_table.bin create mode 100644 algo/ximalaya/x3m_crypto.go create mode 100644 algo/ximalaya/x3m_scramble_table.bin create mode 100644 algo/ximalaya/ximalaya.go diff --git a/algo/ximalaya/x2m_crypto.go b/algo/ximalaya/x2m_crypto.go new file mode 100644 index 0000000..602a75e --- /dev/null +++ b/algo/ximalaya/x2m_crypto.go @@ -0,0 +1,34 @@ +package ximalaya + +import ( + _ "embed" + "encoding/binary" +) + +const x2mHeaderSize = 1024 + +var x2mKey = [...]byte{'x', 'm', 'l', 'y'} +var x2mScrambleTable = [x2mHeaderSize]uint16{} + +//go:embed x2m_scramble_table.bin +var x2mScrambleTableBytes []byte + +func init() { + if len(x2mScrambleTableBytes) != 2*x2mHeaderSize { + panic("invalid x3m scramble table") + } + for i := range x3mScrambleTable { + x3mScrambleTable[i] = binary.LittleEndian.Uint16(x2mScrambleTableBytes[i*2:]) + } +} + +// decryptX2MHeader decrypts the header of ximalaya .x2m file. +// make sure input src is 1024(x2mHeaderSize) bytes long. +func decryptX2MHeader(src []byte) []byte { + dst := make([]byte, len(src)) + for dstIdx := range src { + srcIdx := x2mScrambleTable[dstIdx] + dst[dstIdx] = src[srcIdx] ^ x2mKey[dstIdx%len(x2mKey)] + } + return dst +} diff --git a/algo/ximalaya/x2m_scramble_table.bin b/algo/ximalaya/x2m_scramble_table.bin new file mode 100644 index 0000000000000000000000000000000000000000..ab586dd5507186823ef78d0e904a3b7826ccd6ac GIT binary patch literal 2048 zcmV~$17HvU00h8Cwr$(is%6`@ZM&9j+qP}nwr$<5&?;5oN-fuFRpv6SQ6(s6kM^xH-aZcsTc)Gr4^O>R_KF3?X0M=fqr8P3-ahd^y^ zR%y=DcZWnBZc!=D)i;MiU2auL&e2zgMm=s*3C`9Rhe3UAS8>kLXNN@t?oct#)F+2S zL+(^j&d^7PMYXE@Dfg-nr|7LCqZ#+9ASdgM zqo6tWD}a;q+ELMh2ULI)^~%xEk_VNa6ZF#2(TazZkK^^iG0>Wam6zl6+%eIHN0f(S z^~|x*mPeJFWAxOq(T>NIi=*|#anPQ}m6N0N*m2Q;CzOLD^~mwiktda%L3-%;=)_aX z#u0kp1nA7u%F5xo?}X^WGg^VatnNhU%ClODf2`re=*Dwe1*oQzpgYfNHKlEnC%UX}%s^^sG!z&XF)ab`+ z+JsPQ=rrih>)MRaYUH#Sz#H0vFly{{7|5I2im+I@jn+uDxsYUYd> z!aLf52x{(37|OfaiHK_9%oxUd+J#7J=`0w|``V4jYUQjL!3WxdC~EC&2;xKSMO3wM zc8ugB?L#!Rbq(DwR294<`W%247GPIjNwxqL`-#XZj9wK9YQR1bRLZ3a~(!( zb#h*e=L;P{9Cda+OyEl$MO<}peoW*m9YZ{IbpcG`YaK^?b#nkF^Nmg*fx5dOrtqy! zBB6S?5T^2-P9c$cx-h2ky-p*sdN~l&`9WupM7>=EGx$+wkyL$L6f^lr=a5W&T@17M zS?7^l{ahTg`9&9yLj7F=bNE#kkx~O(5_9=Ymyk*WT?+H~U6+wsgIpT(`9oKbMuS}j z3;0u4kyb-o77O`H*N{#_T@H)*Ti20Z!(1MV`A0X9LBm}EOZZnekx?UD5li_`w~$Fe zu7qWTZzHotx-yoNzJn|pu1QP zDXxc24Cm*_uc@w&%?$4sD4=O>fGv#Rmk7{wH^f#(^eYt93^&3yM)GSE(o8qTc1HFa z6xJ*^!45|8TLfyhn_?%U`W=dBj+3LlifNu(U=L&XBZ_OjTVgL` z`V&fMfm>l8WBD^mYN1```l8I0S2Jv-{#A(>f&UXp8&d64N;p>uRg}<1*7bH0x=b2jB`bI1KA+ zy9eSbGde6AXom;k8Z$W@8)~Nq<2o}tJR513hu{XYI074Mw};{;vpOQ1Xpe{C7PC1L zn`*Cz<2JK9GMj0iN8k=~I0~CIUSWPbigBVkGUL;Ep^bNaG$vyovn1pqw#=w z9D}WO*kkaJc^#8&bi`xvi1{3gZFSV+@R<1>o9%SWVi6}|SDp1Vyk=1+W;dPl zbi83PCt-J;_YAycaVKRDUGPl2V+ki?PhIpZyk|)#XD?myY|5czr#wMWjD`9B!zPs26+%}vAK7kfOcvd=es_daGOgYIa4?u!?--hxdWE-m~-I^ zwrCG0xeaFUffHa8GU}Qp@uj0<4#Fs!3$T_iqLrGflPYVnLMgU$vW%Z$ih?V?Gcce3 z;*93=iqqgYYG|0!=(fi4n?s=wF0q4`A-+DSBhNSso?xQFDyjom$LG;ZomELw6-)`8 zhFKhupVfwkoDbwh&E$P2#1>@L2`%Lb=fHcc(kb@w6#QW-$6*N9;6m3$RnB%}bm1kZ z!#OljSC!Wc{bV{v=ReiwDpx@u+jtF<>xl;Pog-m1KCp;CVVw?hm`C6dYx@FPs)gFB zzWOMy_Gu&6x+3zjs&Ar)N@%HWv#Ix^n3n4*+j=#U>ACvxm7`%cLMo24vXH-Hx3+MR z>!1>+xD`h8heMzjF0iu~Bc}eU0oS+^^0B(Fp@ZsZpt9?zR&uuk5uf2*ibFgS&sf=a zFhm)2T@(4*Q85ElQYT|#r(}9Z;~zETdY4Cb2KqBLYcD6dE#~l+lVLB4XuS?{qzB*z zTY4+9>A05hxO3tI*61h)dkj7@ufYqN#k)?7T_~un+Qk`ehF-kqMA(je+M~@};##P{ z@otYLJmqY7i8*@95`K+EdctbHj*hCXASKdk_23Psz(JJO0=;BeKgI-wQxq3s1D`}K z4OS+d*KFQ#66{7HZPGqYa62sI1!urjv{zmAS56()YVLGVBxWqPFF|bmR8wwuaU^8|r)MsQdL;2OA(HEE5-pi3d@70NCof&sAT&Z+V zLHuK(8&0yXC*v2>I2P^NT;>`m%@H1qJ8a?uD5ZsZ!3utWQHrDQYQcRjh%kJr0etJo zn1FB0=J0%{&OGN#xQzkIp(9$wT`qz|jOpAg?}r$zSo)>L-0adw$D9tuhZ@G;HoD_9 zdwVMWGNt1(l&f%>TVOChIUI)KJ{$T3YHFy`>88f>qr+nu93rz;*ogGHp$Yup2pEos ztmiXms9p-x1|8ri_s4a%@@8b#InCuwC&xY%)oLB%K##*0=5S~}))0PnSPaBXw(vIO z)&Z^O2A4xN7WP+c(@xHGQ}pC*C&eBV)<*5;75$fPi%TIbvpNDlsvVCw5B}hk z7V*3@;s&~@jOOVzOZf$6>m7^xEmr6pyLthlDY$ELv1_9uC%ZMK@~LBE6_V(s`tXV4 zU>#EGfrj&+fi5`C{+@{M%FW2Qbcw?pu*M)H?~p$E>er)R=S