54 lines
1.8 KiB
Plaintext
54 lines
1.8 KiB
Plaintext
#!/usr/bin/env nomsu -V5.12.12.8
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#
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This file defines some actions for hashing files and looking up files by hash.
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use "lib/os.nom"
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use "lib/base64.nom"
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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lua> "local \$use_sha1, \$hashlib = pcall(require, 'openssl.digest')"
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test:
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assume (hash "hello world") == (hash "hello world")
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assume ((hash "hello world") != (hash "goodbye")) or barf "
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Hash collision:
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(hash "hello world") = \(hash "hello world")
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(hash "goodbye") = \(hash "goodbye")"
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assume (..)
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(..)
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hash "
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This is a really long string meant to stress test the hashing function and
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ensure that it's not overflowing with long inputs."
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..!= "inf"
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assume ((hash "\000") != (hash "\000\000\000\000\000")) or barf \
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.."Incorrect hashing of null strings"
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if $use_sha1:
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assume ((hash "hello world") == "Kq5sNclPz7QV2+lfQIuc6R7oRu0=")
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if $use_sha1:
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externally (hash $) means:
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$hash = (=lua "\$hashlib.new('sha1'):final(\$)")
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return (base64 $hash)
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..else:
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# TODO: remove warning?
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say "\027[31;1mWARNING: OpenSSL module not found. Defaulting to a non-cryptographically secure hash function.\027[0m"
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externally (hash $) means:
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$bytes = ($|bytes)
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$hash = ($bytes.1 << 7)
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for $i in 2 to (size of $bytes):
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$hash = ((1000003 * $hash) ~ $bytes.$i)
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$hash = ($hash ~ (size of $bytes))
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return "\$hash"
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externally (file with hash $hash) means:
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for $filename in (files for "."):
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$contents = (read file $filename)
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$file_hash = (hash $contents)
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if ($file_hash == $hash):
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return $filename
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(hash of file $filename) parses as (hash (read file $filename))
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