Boostrap oscal generator and subcommand

This command initializes the first oscal output and
generator for the baseline data.

Signed-off-by: Adolfo García Veytia (Puerco) <[email protected]>

cmd/go.mod

@@ -3,6 +3,7 @@ module github.com/ossf/security-baseline
 go 1.23
 
 require (
+	github.com/defenseunicorns/go-oscal v0.6.2
 	github.com/spf13/cobra v1.8.1
 	gopkg.in/yaml.v3 v3.0.1
 )

cmd/go.sum

@@ -1,5 +1,7 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/defenseunicorns/go-oscal v0.6.2 h1:oLkMAJYVMq73Rm+9efcyaKq5SLMditjB6wv7o3XXpq8=
+github.com/defenseunicorns/go-oscal v0.6.2/go.mod h1:UHp2yK9ty2mYJDun7oNhbstCq6SAAwP4YGbw9n7uG6o=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=

cmd/internal/cmd/oscal.go

@@ -0,0 +1,94 @@
+// SPDX-FileCopyrightText: Copyright 2025 The OSPS Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package cmd
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/ossf/security-baseline/pkg/baseline"
+	"github.com/spf13/cobra"
+)
+
+var appname = "baseline"
+
+type oscalOptions struct {
+	outPath      string
+	baselinePath string
+}
+
+// Validate the options in context with arguments
+func (o *oscalOptions) Validate() error {
+	errs := []error{}
+
+	if o.baselinePath == "" {
+		errs = append(errs, errors.New("baseline path not specified"))
+	}
+	return errors.Join(errs...)
+}
+
+func (o *oscalOptions) AddFlags(cmd *cobra.Command) {
+	cmd.PersistentFlags().StringVarP(
+		&o.baselinePath, "baseline", "b", "", "path to directory containing the baseline YAML data",
+	)
+
+	cmd.PersistentFlags().StringVarP(
+		&o.outPath, "out", "o", "", "path to output file (defaults to STDOUT)",
+	)
+}
+
+func addOscal(parentCmd *cobra.Command) {
+	opts := oscalOptions{}
+	packCmd := &cobra.Command{
+		Short: "writes the baseline definition to an oscal json catalog",
+		Long: fmt.Sprintf(`
+%s oscal: Write the OSPS Baseline to oscal definitions.
+
+This subcommand exports the OSPS Baseline data to OSCAL (Open Security Controls
+Assessment Language). This lets automated tools understand the criteria set as 
+OSCAL controls.
+
+`, appname),
+		Use:           "oscal -o osps.oscal.json",
+		SilenceUsage:  false,
+		SilenceErrors: true,
+		PreRunE: func(_ *cobra.Command, args []string) error {
+			if opts.outPath != "" && len(args) > 1 && opts.outPath != args[1] {
+				return fmt.Errorf("out path specified twice")
+			}
+
+			if len(args) > 1 {
+				opts.outPath = args[1]
+			}
+			return nil
+		},
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := opts.Validate(); err != nil {
+				return err
+			}
+
+			cmd.SilenceUsage = true
+
+			loader := baseline.NewLoader()
+			loader.DataPath = opts.baselinePath
+
+			bline, err := loader.Load()
+			if err != nil {
+				return err
+			}
+
+			// TODO: Open the output file
+
+			gen := baseline.NewGenerator()
+			if err := gen.ExportOSCAL(bline, os.Stdout); err != nil {
+				return err
+			}
+
+			return nil
+		},
+	}
+	opts.AddFlags(packCmd)
+	parentCmd.AddCommand(packCmd)
+}

cmd/internal/cmd/root.go

@@ -17,6 +17,7 @@ func Execute() error {
 	// Add the subcommands
 	addCompile(rootCmd)
 	addValidate(rootCmd)
+	addOscal(rootCmd)
 
 	return rootCmd.Execute()
 }

cmd/pkg/baseline/generator_oscal.go

@@ -0,0 +1,107 @@
+// SPDX-FileCopyrightText: Copyright 2025 The OSPS Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package baseline
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"strings"
+	"time"
+
+	oscal "github.com/defenseunicorns/go-oscal/src/types/oscal-1-1-3"
+	"github.com/ossf/security-baseline/pkg/types"
+)
+
+const (
+	VersionOSPS = "devel"
+	controlHREF = "https://baseline.openssf.org/versions/%s#%s"
+	catalogUUID = "8c222a23-fc7e-4ad8-b6dd-289014f07a9f"
+)
+
+func (g *Generator) ExportOSCAL(b *types.Baseline, w io.Writer) error {
+	n := time.Now()
+	catalog := oscal.Catalog{
+		UUID:   catalogUUID,
+		Groups: nil,
+		Metadata: oscal.Metadata{
+			LastModified: n,
+			Links: &[]oscal.Link{
+				{
+					Href: fmt.Sprintf(controlHREF, VersionOSPS, ""),
+				},
+			},
+			OscalVersion: "1.1.3",
+			Published:    &n,
+			Title:        "Open Source Project Security Baseline",
+			Version:      VersionOSPS,
+		},
+	}
+
+	catalogGroups := []oscal.Group{}
+
+	for code, cat := range b.Categories {
+		group := oscal.Group{
+			Class:    "OSPS",
+			Controls: nil,
+			ID:       code,
+			Title:    cat.Description,
+		}
+
+		controls := []oscal.Control{}
+
+		for _, criteria := range cat.Criteria {
+			newCtl := oscal.Control{
+				Class: criteria.Category,
+				ID:    strings.TrimPrefix(criteria.ID, "OSPS-"),
+				Links: &[]oscal.Link{
+					{
+						Href: fmt.Sprintf(controlHREF, VersionOSPS, strings.ToLower(criteria.ID)),
+						Rel:  "reference",
+					},
+				},
+				Parts: &[]oscal.Part{
+					{
+						ID:    strings.TrimPrefix(criteria.ID, "OSPS-") + "_level",
+						Name:  "maturity-level",
+						Prose: fmt.Sprintf("%d", criteria.MaturityLevel),
+					},
+					{
+						ID:    strings.TrimPrefix(criteria.ID, "OSPS-") + "_details",
+						Name:  "details",
+						Prose: strings.TrimSpace(criteria.Details),
+					},
+					{
+						ID:    strings.TrimPrefix(criteria.ID, "OSPS-") + "_rationale",
+						Name:  "rationale",
+						Prose: strings.TrimSpace(criteria.Rationale),
+					},
+				},
+				Title: strings.TrimSpace(criteria.CriterionText),
+			}
+
+			if criteria.Implementation != "" {
+				pts := append(*newCtl.Parts, oscal.Part{
+					ID:    strings.TrimPrefix(criteria.ID, "OSPS-") + "_implementation",
+					Name:  "implementation",
+					Prose: strings.TrimSpace(criteria.Implementation),
+				})
+				newCtl.Parts = &pts
+			}
+
+			controls = append(controls, newCtl)
+		}
+
+		group.Controls = &controls
+		catalogGroups = append(catalogGroups, group)
+	}
+	catalog.Groups = &catalogGroups
+
+	enc := json.NewEncoder(w)
+	enc.SetIndent("", "  ")
+	if err := enc.Encode(catalog); err != nil {
+		return fmt.Errorf("encoding oscal json data: %w", err)
+	}
+	return nil
+}