63 lines
1.9 KiB
Plaintext
63 lines
1.9 KiB
Plaintext
#!/usr/bin/env nomsu -V7.0.0
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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 "filesystem"
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use "base64"
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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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if ((hash "hello world") == (hash "goodbye")):
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fail ("
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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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")
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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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")
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) != "inf"
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if ((hash "\000") == (hash "\000\000\000\000\000")):
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fail "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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external:
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(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 ("
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\027[31;1mWARNING: OpenSSL module not found. Defaulting to a non-cryptographically secure \
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..hash function.\027[0m
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")
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external:
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(hash $) means:
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$bytes = ($, bytes)
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$hash = ($bytes.1 << 7)
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for $i in (2 to #$bytes):
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$hash = ((1000003 * $hash) ~ $bytes.$i)
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$hash = ($hash ~ #$bytes)
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return "\$hash"
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external:
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(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)) |