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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build go1.18
// +build go1.18
package scan
import (
"encoding/json"
"fmt"
"io"
"sort"
"golang.org/x/vuln/internal/derrors"
"golang.org/x/vuln/internal/vulncheck"
)
const (
// extractModeID is the unique name of the extract mode protocol
extractModeID = "govulncheck-extract"
extractModeVersion = "0.1.0"
)
// header information for the blob output.
type header struct {
Name string `json:"name"`
Version string `json:"version"`
}
// runExtract dumps the extracted abstraction of binary at cfg.patterns to out.
// It prints out exactly two blob messages, one with the header and one with
// the vulncheck.Bin as the body.
func runExtract(cfg *config, out io.Writer) (err error) {
defer derrors.Wrap(&err, "govulncheck")
bin, err := createBin(cfg.patterns[0])
if err != nil {
return err
}
sortBin(bin) // sort for easier testing and validation
header := header{
Name: extractModeID,
Version: extractModeVersion,
}
enc := json.NewEncoder(out)
if err := enc.Encode(header); err != nil {
return fmt.Errorf("marshaling blob header: %v", err)
}
if err := enc.Encode(bin); err != nil {
return fmt.Errorf("marshaling blob body: %v", err)
}
return nil
}
func sortBin(bin *vulncheck.Bin) {
sort.SliceStable(bin.PkgSymbols, func(i, j int) bool {
return bin.PkgSymbols[i].Pkg+"."+bin.PkgSymbols[i].Name < bin.PkgSymbols[j].Pkg+"."+bin.PkgSymbols[j].Name
})
}
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