func runAddsigMfgCmd()

in cli/mfg_cmds.go [447:504]
44 lines of code
10 McCabe index (conditional complexity)

func runAddsigMfgCmd(cmd *cobra.Command, args []string) {
	if len(args) < 3 {
		ImgmodUsage(cmd, nil)
	}

	mfgDir := args[0]
	keyFilename := args[1]
	sigFilename := args[2]

	outDir, err := CalcOutFilename(mfgDir)
	if err != nil {
		ImgmodUsage(cmd, err)
	}

	// Read manifest.
	mman, err := readManifest(mfgDir)
	if err != nil {
		ImgmodUsage(cmd, err)
	}

	// Read public key.
	keyBytes, err := ioutil.ReadFile(keyFilename)
	if err != nil {
		ImgmodUsage(cmd, errors.Wrapf(err, "error reading key file"))
	}

	// Read signature.
	sig, err := ioutil.ReadFile(sigFilename)
	if err != nil {
		ImgmodUsage(cmd, errors.Wrapf(err, "failed to read signature"))
	}
	if len(sig) > MAX_SIG_LEN {
		ImgmodUsage(nil, errors.Errorf(
			"signature larger than arbitrary maximum length (%d > %d)",
			len(sig), MAX_SIG_LEN))
	}

	// Update manifest.
	mman.Signatures = append(mman.Signatures, manifest.MfgManifestSig{
		Key: hex.EncodeToString(sec.RawKeyHash(keyBytes)),
		Sig: hex.EncodeToString(sig),
	})

	// Write new artifacts.
	if err := EnsureOutDir(mfgDir, outDir); err != nil {
		ImgmodUsage(nil, err)
	}

	json, err := mman.MarshalJson()
	if err != nil {
		ImgmodUsage(nil, err)
	}

	manPath := fmt.Sprintf("%s/%s", outDir, mfg.MANIFEST_FILENAME)
	if err := WriteFile(json, manPath); err != nil {
		ImgmodUsage(nil, err)
	}
}