http://eigenclass.org/rubychallenge2007
Your mission, should you choose to accept it, is to find the secret
message
hidden in a Ruby script, follow the instructions to generate the code
that
will prove you’ve found the message, and report it via eigenclass.org
(more
details at the above address).
This script works with Ruby 1.8.5 (also tested with -p12); alternative
versions for Ruby 1.8.2, 1.8.3 and 1.8.4 are also available.
If you want to try to crack the script, it’s safer to download it from
eigenclass.org (cut&paste fails too often…)
One request: please don’t publish your hints/solutions — let’s try to
keep
the challenge interesting for future readers. Thank you.
The script must be saved as happy2007-eigenclass.org-1.8.5.rb (exactly)
and
run with Ruby 1.8.5, without RubyGems:
$ RUBYOPT=“” ruby happy2007-eigenclass.org-1.8.5.rb
I hope you have fun.
#OrNYAMv67ABbqnK01lSLaHsKlmOBIwcFqzuEXezq5cAYnu6IFvAF8IBXMDCp8R7NheeL13UiFV39S
“02312ZqeVxtl3gw6NVawApA9bwn9LLGBfE/66UCuABlSFVRSr00stZa7YkchPYzsaMdQcLWp5xKCd
0BUpoXvq5vnxVMgz29HvqTrnZVpDfDpWKB3m0uCcBY4rKSFoQ3rWDi8lArMyig2/nPObKuucdhlQjt
OkQMgNXiH9l+bOmeMpiNTN8PIZoEcFFl0YwtcSXGOo4Tam21XPf7N9izo/7LAemLSG3mZ55cAgLegq
+XJoRGtDMLrDj Ho7b9Q
I/IeCa60CPfzR2rTh2Ng9aNLsxYLxBUS+ZnRJHQmmjGo6v4FfBnIVZx
h0XTyv0X4+jcA wmWsmS
4cpRZ1ev7zmwvbWMFG5KZlDPoBLlgWoqe2FoDKx3q3n/UDmi6beIMdO
nz4VAxdGERKv3 cki9FT
O8aHKbLlx/BlP4hcD+63B+eRpAgK58DnV4sUKvo9BCuwQqM8k6WcDqS
WP7ZNGiW8eA4y UIfsyd kX1v mUI Z FCsr A EUS ao47J
GMlefa8WAd0b0UN
YsfAiDTOmWugK 9MDpTe gqE cz/7 cy l1 86M kf P6n TLf
bxh5zibUMKyMmmGx
8OK5/1KjPRq1X aFUZkijk Qo Lx/Y 8R 7P38 WV ZL0
6Spf3M+okFpRQg2G
UpfuWbtyB06BH 2Eu/vZ tbS AW 8kGx It 8VEl JP UZ2
8zosYQvGPPiDJmwU
BpD+lkFRe/Piu 3kydXF Ij oHL5 ud mbSy Ti 6bwe daK a
HYPybXbENNQlJoSGr
CMCxXR3KlonNk NOCefm +4 fq6H 9o Yi0S vk +a1W AWx S
AT5p/7w4YkUrFIxo/
TESZLgRi1KIkw Nz4c8t NV yVB E5 eU E/h Av hev6v
vd5lgvX4xykKm2PzV
EvGksbbXFjezU Ennwvv FtT K 2y J c8h+ / 8NaJwN
VbFruIzmZ6A9GomBIV
1nN0eUMI5vdwTBD/034y6pP3gO9+tgY/Z+u D5oBVQlu jNK/74Mua6i
RAmHBnc7jSxvMB9os7
OE0v5q0/qNXYL7jfOZJ0Pgbnvih4ViB6ZWW LGu13Bdl fV3pNN49KZ
Ra1rjx0Vtd6bbnVVFyO
uzaad8w90GXhl52Q4hIkcKYeiT6TJ1O05ir eODiQFTS JRdOZ70m
PhyljHwB/FPzjJvSseqW
tJab3eZ+6uRFmEwsYCc37P2/24slUQ1f7d9eDpZ4NS4rVlaeIx5qH1fvZis8SUTGi3qT4BuK/wwGJb
Dfw3dLu2uzIF4LbRzEl59Ni7EC0q/Pj0FUlY25CESpCiX7Tn8VhzJP7ObzONwpB1IptdshseudGY2F
jeivpdahI26bvOWlPzb h1f+9T IK6oAn TerM
3DRb4S3gk+PjoejtttW6Ee
PcnmtNVDNCAcOB9NV5 FWRh 38FS tp 7KCq 1k 6M4yO6ILq
xVRpWPwqzICh9sav/u2Pnp
MHxn4RF3UPxPtMnRc6XxvZHX it ld1g c/u l8v5 1j7p6vM4
ltqOtjAetny2g14uvLGKYC
fAKn38RogjLz50xMtrw4aPl3 Gt 1J6e tr of90 0j35GGQ
vv+TvjX4SeKRn1HPfGS8mjV
utf/Mh4BFfMdnT8xsCqPMdy IW vb0L pm KgON w0clVkY
PlyjUZVqIN2spadEG40Zib7
geEI0WDd12Wfv45sont9TAE L5m BpSO 6w NfW5 Js9hP8
+UTtyV7vM75mIpxomFHjHWFT
yNDKGiMk3lJmW3RbGBmTyk c8bJ /kEZ /J cvad O3JCFi
TvOhTHvMkcEkG7Rto/vzg1TD
ThuG4tBCTsMrV4enitht+ ITOE4 2Fr5 sa v9ag 7lIZw
EYHMdZFbRlO8blKy1q1tOQtxZ
2hQwARL2xBVaMQayxKry FzHVyZ xCS5 go DAcn jKXp/
tkWXIhFV3uDGDgXBfPGJZ69qS
hfGaODSze+D/ixRRfeL yRMMFlkE mt t0Ig Mm fWqbV
gXMbbZ7UN3GelWTpEbAsKa12W
bqDUMPbQLy16Da85we jnb/ qayEBP Jt5kDC
foIihFX3rGmjv8H35nLt4bwKg7
SV2t9d9QPLEGEBIexr69FqX3fLii4UUouUUfs8RLJAHgWEoztt1tloZ8I7TsBpGtfTJntGyZdwcKEW
NW7BTaYhVj70niCV4Ws407gIjZN5gIW1XeplrvpKEOGzuN9vmynojJOdgVfVV2hgJISHMCZHYehge0
jzGCFECNwaUmxJiP80PRWWwjBY7hKnjhQjvyvhtGcNMEZAQPKYPYJcYQFIrCVjzDQmZUnZXNBu7SIy
qneV+2/f4rOxDgu56FqYA39CAgtCVQTwmrWkpFt1M1ACFnacRf9ypJgS1kEURs3xx2/dngv0YGiSZG
tiLXL3PyxR8mv21RsVCD2wA00400eNo1kFtLAzEQhd/zK8YiVKENVRBFEKEIPpWK1Ic+Zjezu6O5LJ
mEdf+9k8U+5TLnO2dm9sfj4QqUOscClmxYZ7DYFUbIA0ITfQNtTAnb7Gat3sjCLEofLXXzIhlT7JPx
EBMkDMYjUH6F0wWeyDnA39FFK5VuoW2UGOVNoLE4kysBrUkS69wMN/IyjuOFYpgGDP/gBkyGTB55Ay
L5LpwhlaAq0xsKUEImVw15iBMvHUqON5liuNXqYH4QuCSsfms5BA4U+kpMlAf4LM0Md/pJPwhnQbqq
KylcNbX2jp43SjQlMOa8fH/tz8eP07OC68v9ZbUSZ1ENZhzn+93ucYvUY2idYdYx9dslQqdGqboqxj
ZhBhmLTS/7kJkNLead7LWOToHJotZa/QG9gJR7nNQde2XvHS8rqELruQqnMCQYPOvJepTOCl79AioL
“.instance_eval{|$x|def h(q)q.unpack(“m*”)[0]end;def
k(z);Zlib::Inflate.inflate(
z)end;require’zlib’;rr=eval k(h(File.read($0)[-605…-2]));ps=false;puts
rr if ps
begin;class<<$<;class<<self;class<<self;def f;end;f;end end end;rescue
NameError
p=lambda{rr=(rr.to_i*214013+2531011)&(2**32-1);(rr.to_i>>16)&0xff};begin
v=$x.
gsub(/\s+/,””);v2=“”;h(v[5,k=v[0,5].to_i]).each_byte{|b|v2<<(b^p[])};eval(k(v2)
)[$x];rescue Interrupt;rescue Exception;puts
k(h(v[10+k,v[5+k,5].to_i]));exit(
42);end;else$W||=SCRIPT_LINES__={};class<<$<;class<<self;class<<self;def
self.x;
end end end end; load($0) end};exit
Copyright (C) 2005-2007 Mauricio F. [email protected]
http://eigenclass.org
Get the hidden message and claim your prize at eigenclass.org!
END
eNpVUVtr2zAUZo817D+IYBOp2RSnS9ouqh/cxQ2GxYEmbLAsCFk+zbw6tifJpeTy36c4g1G9SDrn8N1O
3RjdnURf5pM4mVJKUTxN5o8RmkWLRTiNFug+ejj9wySehct4nnSZgj9NrgB1s3wD2vS32ajruN+ix/v5
IkIoQGVeOCZ4yAugCkSGXZ8wPPB9v6dEmeGR7xNCTb4FvU9hk5dMfEgDPKD0itCtqPftlKE63wE5Ul0p
w+BFFNisBKXp+tJinZGuLBCxerRsAEWvEmqTVyWDMjs6jstFsFozDYYbJSTwp6aUqFaV3B8uBT/Y/t0d
FpxmUIABLgweEiY4OTLXBJNwGbITCXv/FgFbd4TJQmiN5ulvkIY1ZQZPfAvmV5WhcY3+CbKDyEphtol3
QefTYDi6Ho461nrFc8YmbXrj8WwyoucksZV0auqeFEUB6vx2O3SjoMZ9qlK3T85Fz/vpac87XZnncf41
TiLOe9g1tK50gL3/58zXe7MOqqUosacuVuHHH2tMyfLdBWkDt97bKQv1/XDYHwm1yTegV/66Zbaba8pa
yGfcSTrEVpGHrm8G/u3tzefWLdo5fwFjGbgl1