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42 lines
2.0 KiB
Bash
Executable File
42 lines
2.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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# usage: script.sh target-dictionary-filename
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# this script searches for interesting strings in the source code and converts
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# them into a standard fuzzer dictionary file.
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TARGET_DIR=../tests
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OUTPUT_FILE=${1:-fuzzer_crypto_tests_strings_dictionary1.txt}
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# empty file
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echo -n "" > $OUTPUT_FILE
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# strip multiline strings and extract them
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# exclude some hex strings, but allow hex strings with mixed capitalization (Ethereum, rskip60)
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find $TARGET_DIR -type f | xargs cat | perl -p0e 's/"\s*\n\s*\"//smg' | grep -P -o "\"[\w ]+\"" | grep -v -P "\"(([0-9a-f][0-9a-f])+|([0-9A-F][0-9A-F])+)\"" | sort | uniq | while read -r line ; do
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echo "$line" >> $OUTPUT_FILE
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done
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# extract individual BIP39 and SLIP39 words
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# TODO are those actually valuable as fuzzer dictionary input?
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# grep -r -P -o -h "\"\w+\"" ../slip39_wordlist.h ../bip39_english.h | sort | uniq >> fuzzer_crypto_tests_strings_dictionary1.txt
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# extract and convert binary input data from the unit tests
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# find each file, cat it, concatenate multiline strings, look for hex strings in quotes
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# note that this returns multiple megabyte of result strings due to the large amount
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# of test cases in the wycheproof project subfolder
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find $TARGET_DIR -type f | xargs cat | perl -p0e 's/"\s*\n\s*\"//smg' | grep -P -o "\"([0-9a-fA-F][0-9a-fA-F])+\"" | grep -P -o "([0-9a-fA-F][0-9a-fA-F])+" | sort | uniq | while read -r line ; do
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# turn ascii hex strings AA into \xaa for the fuzzer format and add quotes
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# extra backslash escape due to the bash nesting
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escaped_hex=`echo $line | sed -e 's/../\\\\x&/g'`
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echo "\"$escaped_hex\"" >> $OUTPUT_FILE
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done
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# search and reassemble BIP39 test seeds that span multiple lines
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# find each file, cat it, concatenate multiline strings, look for BIP39 seed combinations with reasonable length
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find $TARGET_DIR -type f | xargs cat | perl -p0e 's/"\s*\n\s*\"//smg' | grep -Po "(\w{3,10} ){11,23}(\w{3,10})" | sort | uniq | while read -r line ; do
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echo "\"$line\"" >> $OUTPUT_FILE
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done
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