feat: init nightly vuls for blackhat

pkg/scan/os/os.go

@@ -0,0 +1,93 @@
+package os
+
+import (
+	"bufio"
+	"context"
+	"strings"
+
+	"github.com/pkg/errors"
+
+	"github.com/future-architect/vuls/pkg/scan/ospkg/apk"
+	"github.com/future-architect/vuls/pkg/scan/ospkg/dpkg"
+	"github.com/future-architect/vuls/pkg/scan/ospkg/rpm"
+	"github.com/future-architect/vuls/pkg/scan/types"
+)
+
+type Analyzer struct {
+}
+
+func (a Analyzer) Name() string {
+	return "os analyzer"
+}
+
+func (a Analyzer) Analyze(ctx context.Context, ah *types.AnalyzerHost) error {
+	status, stdout, stderr, err := ah.Host.Exec(ctx, "cat /etc/os-release", false)
+	if err != nil {
+		return errors.Wrap(err, `exec "cat /etc/os-release"`)
+	}
+	if stderr != "" {
+		return errors.New(stderr)
+	}
+	if status != 0 {
+		return errors.Errorf("exit status is %d", status)
+	}
+
+	ah.Host.Family, ah.Host.Release, err = ParseOSRelease(stdout)
+	if err != nil {
+		return errors.Wrap(err, "parse /etc/os-release")
+	}
+
+	switch ah.Host.Family {
+	case "debian", "ubuntu":
+		ah.Analyzers = append(ah.Analyzers, dpkg.Analyzer{})
+	case "redhat", "centos", "alma", "rocky", "fedora", "opensuse", "opensuse.tumbleweed", "opensuse.leap", "suse.linux.enterprise.server", "suse.linux.enterprise.desktop":
+		ah.Analyzers = append(ah.Analyzers, rpm.Analyzer{})
+	case "alpine":
+		ah.Analyzers = append(ah.Analyzers, apk.Analyzer{})
+	case "":
+		return errors.New("family is unknown")
+	default:
+		return errors.New("not supported OS")
+	}
+
+	return nil
+}
+
+func ParseOSRelease(stdout string) (string, string, error) {
+	var family, versionID string
+	scanner := bufio.NewScanner(strings.NewReader(stdout))
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		ss := strings.SplitN(line, "=", 2)
+		if len(ss) != 2 {
+			continue
+		}
+		key, value := strings.TrimSpace(ss[0]), strings.TrimSpace(ss[1])
+
+		switch key {
+		case "ID":
+			switch id := strings.Trim(value, `"'`); id {
+			case "almalinux":
+				family = "alma"
+			case "opensuse-leap", "opensuse-tumbleweed":
+				family = strings.ReplaceAll(id, "-", ".")
+			case "sles":
+				family = "suse.linux.enterprise.server"
+			case "sled":
+				family = "suse.linux.enterprise.desktop"
+			default:
+				family = strings.ToLower(id)
+			}
+		case "VERSION_ID":
+			versionID = strings.Trim(value, `"'`)
+		default:
+			continue
+		}
+	}
+
+	if family == "" {
+		return "", "", errors.New("family is unknown")
+	}
+	return family, versionID, nil
+}