Project HashClash - MD5 & SHA-1 cryptanalytic toolbox
Feedback & pingback appreciated
Requirements
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C++11 compiler (e.g. g++)
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make
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autoconf & automake & libtool
sudo apt-get install autoconf automake libtool
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zlib & bzip2 libraries
sudo apt-get install zlib1g-dev libbz2-dev
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Optional: CUDA
Building (automatic)
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Run build.sh script
./build.sh
Building (manual)
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local boost C++ libraries (preferable version 1.57.0)
./install_boost.sh
Override default boost version 1.57.0 and/or installation directory as follows:
BOOST_VERSION=1.65.1 BOOST_INSTALL_PREFIX=$HOME/boost/boost-1.65.1 ./install_boost.sh
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Build configure script
autoreconf --install
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Run configure (with boost installed in
$(pwd)/boost-VERSION
byinstall_boost.sh
)./configure --with-boost=$(pwd)/boost-1.57.0 [--without-cuda|--with-cuda=/usr/local/cuda-X.X]
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Build programs
make [-j 4]
Create your own chosen-prefix collisions
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Create temporary working directory (in top directory)
mkdir cpc_workdir
cd cpc_workdir
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Run script
../scripts/cpc.sh <prefix.filename1> <prefix.filename2>
Create you own identical-prefix collision
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Create temporary working directory
mkdir ipc_workdir
cd ipc_workdir
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Run script
echo -n "TEST" > prefix.txt
../scripts/poc_no.sh prefix.txt
Note: the prefix file is expected to be a multiple of 64 bytes and optionally plus a small multiple of 4 bytes. These last bytes will be used as forced message words in steps of 4 bytes inside the first near-collision block. Any remaining 1, 2 or 3 bytes of the prefix file are ignored.
Note: the first time the script is run it will be slower as it needs to create the 'upper' differential path set for the first time.
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Example output:
$ xxd collision1.bin
0000000: 5445 5354 1789 6de2 c568 339d 8bbf 6269 TEST..m..h3...bi
0000010: 563a c4ab 2fba 7aba 6ec7 e182 8566 8883 V:../.z.n....f..
0000020: b0f2 d716 17d5 8f97 b244 b9ca dcaa af93 .........D......
0000030: 3a33 4552 a9fd 023b 7012 7e5c d644 9646 :3ER...;p.~\.D.F
0000040: 723e 737a 6c3a 66e5 5d51 8e7c 7bc2 ec4f r>szl:f.]Q.|{..O
0000050: 95a2 349f 0f4b 2540 cbe6 5644 d113 104b ..4..K%@..VD...K
0000060: 5c39 898d f19a f9e9 e2aa bbad e191 d2d3 \9..............
0000070: a25d 4df0 9058 a873 4ee8 9dc9 47a5 281c .]M..X.sN...G.(.
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Make your own attack
Inside poc_no.sh there are three example identical-prefix collision attacks, selected by N=1, 2 or 3. You can add your own choice of message word differences here and see if you can make own collision attack!