wizardry's Introduction

wizardry

wizardry is a toolkit to deal with libmagic rule files (sources, not compiled)

It contains:

A parser, which turn magic rule files into an AST
An interpreter, which identifies a target by following the rules in the AST
A compiler, which generates go code to follow the rules in the AST

License

wizardry is released under the MIT license, see the LICENSE file for details.

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wizardry's Issues

Fuzz!

This library is a good candidate for fuzzing, using https://github.com/dvyukov/go-fuzz

slice bounds out of range

/c/U/a/A/R/i/a/nsis ❯❯❯ butler configure .
∙ Collecting initial candidates
panic: runtime error: slice bounds out of range

goroutine 1 [running]:
github.com/itchio/butler/vendor/github.com/fasterthanlime/wizardry/wizardry/wizutil.(*ByteView).Get(0xc04203a938, 0x17888, 0x4)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/vendor/github.com/fasterthanlime/wizardry/wizardry/wizutil/byteview.go:37 +0x147
github.com/itchio/butler/vendor/github.com/fasterthanlime/wizardry/wizardry.StringTest(0xc0421c3800, 0x17888, 0xa0cb26, 0x4, 0x0, 0xffffffffffffffff)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/vendor/github.com/fasterthanlime/wizardry/wizardry/string.go:41 +0xec
github.com/itchio/butler/vendor/github.com/fasterthanlime/spellbook.Identify(0xc0421c3800, 0x0, 0x5442b5, 0x0, 0xc04216fd40)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/vendor/github.com/fasterthanlime/spellbook/book.go:1166 +0xd65a
github.com/itchio/butler/configurator.sniffPE(0xdbb700, 0xc04205c120, 0x62ce, 0x4, 0x1, 0x0)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/configurator/configure.go:133 +0xca
github.com/itchio/butler/configurator.sniff(0xdbe5c0, 0xc0421bd680, 0x3, 0xc04216fd70, 0x0, 0x0, 0x0)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/configurator/configure.go:335 +0xa29
github.com/itchio/butler/configurator.Configure(0xc0420441a0, 0x1, 0x0, 0x0, 0x0, 0x0)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/configurator/configure.go:468 +0x6bc
main.configure(0xc0420441a0, 0x1, 0xa11f00, 0xa10653, 0x7, 0xa0d762, 0x5, 0x0)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/configure.go:15 +0xb7
main.doMain(0xc042047f60, 0x2, 0x2)
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/main.go:694 +0xe90
main.main()
        C:/msys64/home/amos/Dev/go/src/github.com/itchio/butler/main.go:500 +0x6b

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