add tests + ssh key support

.gitignore

@@ -16,4 +16,5 @@
 # Dependency directories (remove the comment below to include it)
 # vendor/
 
-/pkgs/sops-install-secrets/sops-install-secrets
+/pkgs/sops-install-secrets/sops-install-secrets
+/pkgs/ssh-to-pgp/ssh-to-pgp

go.mod

@@ -0,0 +1,10 @@
+module github.com/Mic92/sops-nix
+
+go 1.14
+
+require (
+	github.com/mozilla-services/yaml v0.0.0-20191106225358-5c216288813c
+	go.mozilla.org/sops/v3 v3.5.0
+	golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899
+	golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0
+)

go.sum

@@ -208,8 +208,9 @@ golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnf
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190418165655-df01cb2cc480/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 h1:HuIa8hRrWRSrqYzx1qI49NNxhdi2PrY7gxVSq1JjLDc=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899 h1:DZhuSZLsGlFL4CmhA8BcRA0mnthyA/nZ00AqCUo7vHg=
+golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
@@ -260,9 +261,8 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0 h1:HyfiK1WMnHj5FXFXatD+Qs1A/xC2Run6RzeW1SyHxpc=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo=
-golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20181227161524-e6919f6577db/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=

modules/sops/default.nix

@@ -78,6 +78,7 @@ let
     # Does this need to be configurable?
     secretsMountPoint = "/run/secrets.d";
     symlinkPath = "/run/secrets";
+    inherit (cfg) gnupgHome sshKeyPaths;
   });
 in {
   options.sops = {
@@ -97,17 +98,38 @@ in {
     };
 
     gnupgHome = mkOption {
-      type = types.str;
-      default = "/root/.gnupg";
+      type = types.nullOr types.str;
+      default = null;
+      example = "/root/.gnupg";
       description = ''
-        Path to gnupg database directory containing the key for decrypting sops file
+        Path to gnupg database directory containing the key for decrypting sops file.
+      '';
+    };
+
+    sshKeyPaths = mkOption {
+      type = types.listOf types.path;
+      default = if config.services.openssh.enable then
+                  map (e: e.path) (lib.filter (e: e.type == "rsa") config.services.openssh.hostKeys)
+                else [];
+      description = ''
+        Path to ssh keys added as GPG keys during sops description.
+        This option must be explicitly unset if <literal>config.sops.sshKeyPaths</literal>.
       '';
     };
   };
   config = mkIf (cfg.secrets != {}) {
+
+    assertions = [{
+      assertion = cfg.gnupgHome != null -> cfg.sshKeyPaths == [];
+      message = "config.sops.gnupgHome and config.sops.sshKeyPaths are mutual exclusive";
+    } {
+      assertion = cfg.gnupgHome == null -> cfg.sshKeyPaths != [];
+      message = "Either config.sops.sshKeyPaths and config.sops.gnupgHome must be set";
+    }];
+
     system.activationScripts.setup-secrets = stringAfter [ "users" "groups" ] ''
       echo setting up secrets...
-      SOPS_GPG_EXEC=${pkgs.gnupg}/bin/gpg GNUPGHOME=${cfg.gnupgHome} ${sops-install-secrets}/bin/sops-install-secrets ${manifest}
+      ${optionalString (cfg.gnupgHome != null) "SOPS_GPG_EXEC=${pkgs.gnupg}/bin/gpg"} ${sops-install-secrets}/bin/sops-install-secrets ${manifest}
     '';
   };
 }

pkgs/sops-init-gpg-key/sops-init-gpg-key

@@ -72,4 +72,6 @@ gpg --export --armor
 echo 'EOF'
 
 rm "${GNUPGHOME}/key-template"
+parent=$(dirname "$FINAL_GNUPGHOME")
+mkdir -p "$parent"
 mv "$GNUPGHOME" "$FINAL_GNUPGHOME"

pkgs/sops-install-secrets/default.nix

@@ -5,10 +5,9 @@ buildGoModule {
 
   hardeningDisable = [ "all" ];
 
-  src = ./.;
+  src = ../..;
 
-  vendorSha256 = "1ky7xzsx12d8m4kvqkayqzybkf3s0w21d6m8qlhvrm00fmyidkxj";
-  shellHook = ''
-    unset GOFLAGS
-  '';
+  subPackages = [ "pkgs/sops-install-secrets" ];
+
+  vendorSha256 = "sha256-O0z+oEffOOZa/bn2gV9onLVbPBHsNDH2yq1CZPi8w58=";
 }

pkgs/sops-install-secrets/go.mod

@@ -1,9 +0,0 @@
-module github.com/Mic92/sops-install-secrets
-
-go 1.14
-
-require (
-	github.com/mozilla-services/yaml v0.0.0-20191106225358-5c216288813c
-	go.mozilla.org/sops/v3 v3.5.0
-	golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae
-)

pkgs/sops-install-secrets/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -10,6 +11,8 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/Mic92/sops-nix/pkgs/sshkeys"
+
 	"github.com/mozilla-services/yaml"
 	"go.mozilla.org/sops/v3/decrypt"
 	"golang.org/x/sys/unix"
@@ -36,6 +39,8 @@ type manifest struct {
 	Secrets           []secret `json:"secrets"`
 	SecretsMountPoint string   `json:"secretsMountpoint"`
 	SymlinkPath       string   `json:"symlinkPath"`
+	SSHKeyPaths       []string `json:"sshKeyPaths"`
+	GnupgHome         string   `json:"gnupgHome`
 }
 
 func readManifest(path string) (*manifest, error) {
@@ -52,7 +57,26 @@ func readManifest(path string) (*manifest, error) {
 	return &m, nil
 }
 
-func prepareSymlinks(targetDir string, secrets []secret) error {
+func symlinkSecret(targetFile string, secret *secret) error {
+	for {
+		currentLinkTarget, err := os.Readlink(secret.Path)
+		if os.IsNotExist(err) {
+			if err := os.Symlink(targetFile, secret.Path); err != nil {
+				return fmt.Errorf("Cannot create symlink '%s': %s", secret.Path, err)
+			}
+			return nil
+		} else if err != nil {
+			return fmt.Errorf("Cannot read symlink: '%s'", err)
+		} else if currentLinkTarget == targetFile {
+			return nil
+		}
+		if err := os.Remove(secret.Path); err != nil {
+			return fmt.Errorf("Cannot override %s", secret.Path)
+		}
+	}
+}
+
+func symlinkSecrets(targetDir string, secrets []secret) error {
 	for _, secret := range secrets {
 		targetFile := filepath.Join(targetDir, secret.Name)
 		if targetFile == secret.Path {
@@ -62,21 +86,8 @@ func prepareSymlinks(targetDir string, secrets []secret) error {
 		if err := os.MkdirAll(parent, os.ModePerm); err != nil {
 			return fmt.Errorf("Cannot create parent directory of '%s': %s", secret.Path, err)
 		}
-		for {
-			currentLinkTarget, err := os.Readlink(secret.Path)
-			if os.IsNotExist(err) {
-				if err := os.Symlink(targetFile, secret.Path); err != nil {
-					return fmt.Errorf("Cannot create symlink '%s': %s", secret.Path, err)
-				}
-				return nil
-			} else if err != nil {
-				return fmt.Errorf("Cannot read symlink: '%s'", err)
-			} else if currentLinkTarget == targetFile {
-				return nil
-			}
-			if err := os.Remove(secret.Path); err != nil {
-				return fmt.Errorf("Cannot override %s", secret.Path)
-			}
+		if err := symlinkSecret(targetFile, &secret); err != nil {
+			return err
 		}
 	}
 	return nil
@@ -131,7 +142,7 @@ func decryptSecrets(secrets []secret) error {
 	return nil
 }
 
-func prepareSecretFs(mountpoint string, keysGid int) error {
+func mountSecretFs(mountpoint string, keysGid int) error {
 	if err := os.MkdirAll(mountpoint, 0750); err != nil {
 		return fmt.Errorf("Cannot create directory '%s': %s", mountpoint, err)
 	}
@@ -247,6 +258,10 @@ func validateManifest(m *manifest) error {
 	if m.SymlinkPath == "" {
 		m.SymlinkPath = "/run/secrets"
 	}
+	if len(m.SSHKeyPaths) > 0 && m.GnupgHome != "" {
+		return errors.New("gnupgHome and sshKeyPaths were specified in the manifest. " +
+			"Both options are mutual exclusive.")
+	}
 	for i := range m.Secrets {
 		if err := validateSecret(&m.Secrets[i]); err != nil {
 			return err
@@ -288,13 +303,61 @@ func atomicSymlink(oldname, newname string) error {
 	return os.RemoveAll(d)
 }
 
+func importSSHKeys(keyPaths []string, gpgHome string) error {
+	secringPath := filepath.Join(gpgHome, "secring.gpg")
+	secring, err := os.Create(secringPath)
+	if err != nil {
+		return fmt.Errorf("Cannot create %s: %s", secringPath, err)
+	}
+	for _, path := range keyPaths {
+		sshKey, err := ioutil.ReadFile(path)
+		if err != nil {
+			return fmt.Errorf("Cannot read ssh key '%s': %s", path, err)
+		}
+		gpgKey, err := sshkeys.SSHPrivateKeyToPGP(sshKey)
+		if err != nil {
+			return err
+		}
+		if err := gpgKey.SerializePrivate(secring, nil); err != nil {
+			return fmt.Errorf("Cannot write secring: %s", err)
+		}
+	}
+
+	return nil
+}
+
+type keyring struct {
+	path string
+}
+
+func (k *keyring) Remove() {
+	os.RemoveAll(k.path)
+	os.Unsetenv("GNUPGHOME")
+}
+
+func setupGPGKeyring(sshKeys []string, parentDir string) (*keyring, error) {
+	dir, err := ioutil.TempDir(parentDir, "gpg")
+	if err != nil {
+		return nil, fmt.Errorf("Cannot create gpg home in '%s': %s", parentDir, err)
+	}
+	k := keyring{dir}
+
+	if err := importSSHKeys(sshKeys, dir); err != nil {
+		os.RemoveAll(dir)
+		return nil, err
+	}
+	os.Setenv("GNUPGHOME", dir)
+
+	return &k, nil
+}
+
 func installSecrets(args []string) error {
 	if len(args) <= 1 {
 		return fmt.Errorf("USAGE: %s manifest.json", args)
 	}
 	manifest, err := readManifest(args[1])
 	if err != nil {
-		return fmt.Errorf("%s", err)
+		return err
 	}
 
 	if err := validateManifest(manifest); err != nil {
@@ -306,16 +369,24 @@ func installSecrets(args []string) error {
 		return err
 	}
 
+	if err := mountSecretFs(manifest.SecretsMountPoint, keysGid); err != nil {
+		return fmt.Errorf("Failed to mount filesystem for secrets: %s", err)
+	}
+
+	if len(manifest.SSHKeyPaths) != 0 {
+		keyring, err := setupGPGKeyring(manifest.SSHKeyPaths, manifest.SecretsMountPoint)
+		if err != nil {
+			return fmt.Errorf("Error setting up gpg keyring: %s", err)
+		}
+		defer keyring.Remove()
+	} else if manifest.GnupgHome != "" {
+		os.Setenv("GNUPGHOME", manifest.GnupgHome)
+	}
+
 	if err := decryptSecrets(manifest.Secrets); err != nil {
 		return err
 	}
 
-	if err := prepareSecretFs(manifest.SecretsMountPoint, keysGid); err != nil {
-		return fmt.Errorf("Failed to mount filesystem for secrets: %s", err)
-	}
-	if err := prepareSymlinks(manifest.SymlinkPath, manifest.Secrets); err != nil {
-		return fmt.Errorf("Failed to prepare symlinks to secret store: %s", err)
-	}
 	secretDir, err := prepareSecretsDir(manifest.SecretsMountPoint, manifest.SymlinkPath, keysGid)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare new secrets directory: %s", err)
@@ -323,6 +394,9 @@ func installSecrets(args []string) error {
 	if err := writeSecrets(*secretDir, manifest.Secrets); err != nil {
 		return fmt.Errorf("Cannot write secrets: %s", err)
 	}
+	if err := symlinkSecrets(manifest.SymlinkPath, manifest.Secrets); err != nil {
+		return fmt.Errorf("Failed to prepare symlinks to secret store: %s", err)
+	}
 	if err := atomicSymlink(*secretDir, manifest.SymlinkPath); err != nil {
 		return fmt.Errorf("Cannot update secrets symlink: %s", err)
 	}

pkgs/sops-install-secrets/main_test.go

@@ -43,24 +43,48 @@ func writeManifest(t *testing.T, dir string, m *manifest) string {
 	return filename
 }
 
-func TestCliArgs(t *testing.T) {
+func testAssetPath() string {
 	_, filename, _, _ := runtime.Caller(0)
-	var testSecrets = path.Join(path.Dir(filename), "test-secrets")
+	return path.Join(path.Dir(filename), "test-assets")
+}
 
+type testDir struct {
+	path, secretsPath, symlinkPath string
+}
+
+func (dir testDir) Remove() {
+	os.RemoveAll(dir.path)
+}
+
+func newTestDir(t *testing.T) testDir {
 	tempdir, err := ioutil.TempDir("", "symlinkDir")
 	ok(t, err)
-	defer os.RemoveAll(tempdir)
-	secretsPath := path.Join(tempdir, "secrets.d")
-	symlinkPath := path.Join(tempdir, "secrets")
-	gpgHome := path.Join(tempdir, "gpg-home")
+	return testDir{tempdir, path.Join(tempdir, "secrets.d"), path.Join(tempdir, "secrets")}
+}
+
+func testInstallSecret(t *testing.T, testdir testDir, m *manifest) {
+	path := writeManifest(t, testdir.path, m)
+	ok(t, installSecrets([]string{"sops-install-secrets", path}))
+}
+
+func testGPG(t *testing.T) {
+	assets := testAssetPath()
+
+	testdir := newTestDir(t)
+	defer testdir.Remove()
+	gpgHome := path.Join(testdir.path, "gpg-home")
+	gpgEnv := append(os.Environ(), fmt.Sprintf("GNUPGHOME=%s", gpgHome))
 
 	ok(t, os.Mkdir(gpgHome, os.FileMode(0700)))
-	os.Setenv("GNUPGHOME", gpgHome)
-	cmd := exec.Command("gpg", "--import", path.Join(testSecrets, "key.asc"))
+	cmd := exec.Command("gpg", "--import", path.Join(assets, "key.asc"))
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
+	cmd.Env = gpgEnv
 	ok(t, cmd.Run())
 	stopGpgCmd := exec.Command("gpgconf", "--kill", "gpg-agent")
+	stopGpgCmd.Stdout = os.Stdout
+	stopGpgCmd.Stderr = os.Stderr
+	stopGpgCmd.Env = gpgEnv
 	defer func() {
 		if err := stopGpgCmd.Run(); err != nil {
 			fmt.Printf("failed to stop gpg-agent: %s\n", err)
@@ -73,43 +97,40 @@ func TestCliArgs(t *testing.T) {
 		Key:             "test_key",
 		Owner:           "nobody",
 		Group:           "nogroup",
-		SourceFile:      path.Join(testSecrets, "secrets.yaml"),
-		Path:            path.Join(tempdir, "test-target"),
+		SopsFile:        path.Join(assets, "secrets.yaml"),
+		Path:            path.Join(testdir.path, "test-target"),
 		Mode:            "0400",
 		RestartServices: []string{"affected-service"},
 		ReloadServices:  make([]string, 0),
 	}
 
-	var jsonSecret secret
+	var jsonSecret, binarySecret secret
 	// should not create a symlink
 	jsonSecret = yamlSecret
 	jsonSecret.Name = "test2"
 	jsonSecret.Owner = "root"
 	jsonSecret.Format = "json"
 	jsonSecret.Group = "root"
-	jsonSecret.SourceFile = path.Join(testSecrets, "secrets.json")
-	jsonSecret.Path = path.Join(symlinkPath, "test2")
+	jsonSecret.SopsFile = path.Join(assets, "secrets.json")
+	jsonSecret.Path = path.Join(testdir.secretsPath, "test2")
 	jsonSecret.Mode = "0700"
 
-	var binarySecret secret
 	binarySecret = yamlSecret
 	binarySecret.Name = "test3"
 	binarySecret.Format = "binary"
-	binarySecret.SourceFile = path.Join(testSecrets, "secrets.bin")
-	binarySecret.Path = path.Join(symlinkPath, "test3")
+	binarySecret.SopsFile = path.Join(assets, "secrets.bin")
+	binarySecret.Path = path.Join(testdir.secretsPath, "test3")
 
 	manifest := manifest{
 		Secrets:           []secret{yamlSecret, jsonSecret, binarySecret},
-		SecretsMountPoint: secretsPath,
-		SymlinkPath:       symlinkPath,
+		SecretsMountPoint: testdir.secretsPath,
+		SymlinkPath:       testdir.symlinkPath,
+		GnupgHome:         gpgHome,
 	}
 
-	manifestPath := writeManifest(t, tempdir, &manifest)
+	testInstallSecret(t, testdir, &manifest)
 
-	err = installSecrets([]string{"sops-install-secrets", manifestPath})
-	ok(t, err)
-
-	_, err = os.Stat(manifest.SecretsMountPoint)
+	_, err := os.Stat(manifest.SecretsMountPoint)
 	ok(t, err)
 
 	_, err = os.Stat(manifest.SymlinkPath)
@@ -150,13 +171,44 @@ func TestCliArgs(t *testing.T) {
 
 	content, err = ioutil.ReadFile(binarySecret.Path)
 	ok(t, err)
-	equals(t, "binary_value\n", string(content))
 
-	manifestPath = writeManifest(t, symlinkPath, &manifest)
+	testInstallSecret(t, testdir, &manifest)
 
-	err = installSecrets([]string{"sops-install-secrets", manifestPath})
+	target, err := os.Readlink(testdir.symlinkPath)
 	ok(t, err)
-
-	target, err := os.Readlink(symlinkPath)
-	equals(t, path.Join(secretsPath, "2"), target)
+	equals(t, path.Join(testdir.secretsPath, "2"), target)
+}
+
+func testSSHKey(t *testing.T) {
+	assets := testAssetPath()
+
+	testdir := newTestDir(t)
+	defer testdir.Remove()
+
+	s := secret{
+		Name:            "test",
+		Key:             "test_key",
+		Owner:           "nobody",
+		Group:           "nogroup",
+		SopsFile:        path.Join(assets, "secrets.yaml"),
+		Path:            path.Join(testdir.path, "test-target"),
+		Mode:            "0400",
+		RestartServices: []string{"affected-service"},
+		ReloadServices:  make([]string, 0),
+	}
+
+	m := manifest{
+		Secrets:           []secret{s},
+		SecretsMountPoint: testdir.secretsPath,
+		SymlinkPath:       testdir.symlinkPath,
+		SSHKeyPaths:       []string{path.Join(assets, "ssh-key")},
+	}
+
+	testInstallSecret(t, testdir, &m)
+}
+
+func TestAll(t *testing.T) {
+	// we can't test in parallel because we rely on GNUPGHOME environment variable
+	testGPG(t)
+	testSSHKey(t)
 }

pkgs/sops-install-secrets/nixos-test.nix

@@ -0,0 +1,47 @@
+let
+  makeTest = import <nixpkgs/nixos/tests/make-test-python.nix>;
+in {
+ ssh-keys = makeTest {
+  nodes.server = { ... }: {
+    imports = [ ../../modules/sops ];
+    services.openssh.enable = true;
+    services.openssh.hostKeys = [{
+      type = "rsa";
+      bits = 4096;
+      path = ./test-assets/ssh-key;
+    }];
+    sops.defaultSopsFile = ./test-assets/secrets.yaml;
+    sops.secrets.test_key = {};
+  };
+
+  testScript = ''
+    start_all()
+    server.succeed("cat /run/secrets/test_key | grep -q test_value")
+  '';
+ };
+
+ gpg-keys = makeTest {
+   nodes.server = { pkgs, lib, ... }: {
+     imports = [ ../../modules/sops ];
+      sops.gnupgHome = "/run/gpghome";
+      sops.defaultSopsFile = ./test-assets/secrets.yaml;
+      sops.secrets.test_key = {};
+      # must run before sops
+      system.activationScripts.gnupghome = lib.stringAfter [ "etc" ] ''
+        cp -r ${./test-assets/gnupghome} /run/gpghome
+        chmod -R 700 /run/gpghome
+      '';
+      # Useful for debugging
+      #environment.systemPackages = [ pkgs.gnupg pkgs.sops ];
+      #environment.variables = {
+      #  GNUPGHOME = "/run/gpghome";
+      #  SOPS_GPG_EXEC="${pkgs.gnupg}/bin/gpg";
+      #  SOPSFILE = "${./test-assets/secrets.yaml}";
+      #};
+   };
+   testScript = ''
+     start_all()
+     server.succeed("cat /run/secrets/test_key | grep -q test_value")
+   '';
+ };
+}

pkgs/sops-install-secrets/shell.nix

@@ -0,0 +1,4 @@
+{ pkgs ? import <nixpkgs> {} }:
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs; [ go delve utillinux gnupg ];
+}

pkgs/sops-install-secrets/test-assets/secrets.yaml

@@ -0,0 +1,43 @@
+test_key: ENC[AES256_GCM,data:4cC2PTi7xVPZPA==,iv:voX4IQemcgt0O97oLExy5r2V85nn687cIyWmHNDhUag=,tag:ZaKi9m6ziFKNV+gx7XedTw==,type:str]
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    lastmodified: '2020-07-12T08:04:25Z'
+    mac: ENC[AES256_GCM,data:Sw+u03EAxagKQ9qd4Vwr5BRrnAdtPlUC660fpaVb62W481YVmcUo/CW+SBwdZhn1oSAqGDFE0exqWp4+FRhBPNnxcatI2kjnJ/m9INZhrjgTGVcSVC+pLfXYrmtqCxJCS1clREuQ89QG3inDQvgJ2M+A8S6qhlwPfXlIhuyHMI8=,iv:zpdbtNjicBx74MnYqLwMkY0atPFe7BDJI8o4VDhGlb0=,tag:yGnUUSrs+6uFZGuX33yVJg==,type:str]
+    pgp:
+    -   created_at: '2020-07-12T08:03:51Z'
+        enc: |
+            -----BEGIN PGP MESSAGE-----
+
+            hQEMA/m6nevQP1fAAQgAnGLEGUnWgYTLGGZN7sEETu14MJjr4TY7JDhs8VOrA9ng
+            x9ivSF1dPw6arewal70OgxMLnS55HY6L81vRCbu8d0rdfXkdzO6oeMAo79/udKc8
+            F5CDSkdrBImK5xpEQ0stpt1zmmKMAPGuPSbSc48YEt4OYUdpoIO+PesYUUgGerL7
+            4UvXtbhYjIhZL7Sgst/coOUNUWjpQgVRSeza6qcuVfS3gVBvxNCed51n+Cr3/rnD
+            5PXjeWQ8aayLDDV32CjGf+s3+LG0gvJ7A6eq0THjsvgkY4qGHNSMobkN7npFI4lX
+            KZG68Scu5d11IY2N3y0ijRQQxYlPPPpukWvw3CK8htJeAZltLDHzh0bpISpc7gqU
+            xzATRG/LmJk7yS9Vej/B0NGmkVlbB+lFnLZG3lVmDiaQUsgePp2Ho1/j6ysit3/C
+            i87IM8B71y1brldk2mcr1oAoNSVE4dg+/C2HrDRKxA==
+            =Qyuq
+            -----END PGP MESSAGE-----
+        fp: 7FB89715AADA920D65D25E63F9BA9DEBD03F57C0
+    -   created_at: '2020-07-12T08:03:51Z'
+        enc: |
+            -----BEGIN PGP MESSAGE-----
+
+            hQGMA3ulPRkZxd/UAQv/d1ExCl7gVIe0GeH8bc0xl8gt4hvR2ujH0BmmHpQ7SDLa
+            tS7lH3ennlLlN+owN3DkCKqm/BNEQ7Wy5y0oTvmQSo2BdSMYOvHrLKoPK3OsDLPH
+            vtXUKZ+NLKSV2xCSiqrcu4GRki8klLgDNEgna8T21erCXZM8W/ehcOd7gLSUiatd
+            wQTGEhNAA0RO04kf0NoPcNrPak7e0bGbwEc88RdM2QyxSXi6SVrKVHvYVPE3pfFB
+            VkUcWZU2edLUEKIAFRAtmb9s3DSjECMMuoVXR6lrPx4c6OMRKvxtlZh0uOOcRpoG
+            M5KL8O4ZXNxUVNRzPisgqe0hkh2AsnMLIQeWrVLfOLXUdDjr9x42vga/P8WU7AzT
+            /Lxmlu9cY0KKsXpv7yXibZfFJ/K/4Mo9WsNk6tGAmiSUg1hr/NJPha3PDHyX0ER7
+            6dPFeMrvs4VngC0I27v6rlEjU+HiRv3/uLnn04z9DRQEk6a+YpLZTpHvAbzfb1Dg
+            EBpKCQePm2rIzywLE8d60lABXSQKG4/LSH6WgxfRFibORME2z5DD2G7ibiDbVg8j
+            YbrH0E0KeRxYJMJ28FVDlLgoUL+JbNr70uHkdvz8S0hqCYwo+K4KqUOIsiPc6iIL
+            tA==
+            =XoKf
+            -----END PGP MESSAGE-----
+        fp: 2504791468B153B8A3963CC97BA53D1919C5DFD4
+    unencrypted_suffix: _unencrypted
+    version: 3.5.0

pkgs/sops-install-secrets/test-assets/sops-edit

@@ -11,8 +11,9 @@ export GNUPGHOME=$(mktemp -d)
 trap "gpgconf --kill gpg-agent && rm -rf $GNUPGHOME" EXIT
 
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
-gpg --import "$DIR/key.asc"
+gpg --import "$DIR/key.asc" "$DIR/ssh-key.asc"
 gpg --fingerprint --list-keys
-fpr=$(gpg --with-fingerprint --with-colons --show-key ./key.asc | awk -F: '$1 == "fpr" { print $10;}')
+
+fpr=$(gpg --with-fingerprint --with-colons --show-key "$DIR/key.asc" "$DIR/ssh-key.asc" | awk -F: '$1 == "fpr" { print $10;}' | xargs | sed -e 's/ /,/g')
 
 sops --pgp "$fpr" "$@"

pkgs/sops-install-secrets/test-assets/ssh-key

@@ -0,0 +1,38 @@
+-----BEGIN OPENSSH PRIVATE KEY-----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+-----END OPENSSH PRIVATE KEY-----

pkgs/sops-install-secrets/test-assets/ssh-key.asc

@@ -0,0 +1,42 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+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+=WFkZ
+-----END PGP PRIVATE KEY BLOCK-----

pkgs/sops-install-secrets/test-assets/ssh-key.pub

@@ -0,0 +1 @@
+ssh-rsa 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 joerg@turingmachine

pkgs/sops-install-secrets/test-secrets/secrets.yaml

@@ -1,25 +0,0 @@
-test_key: ENC[AES256_GCM,data:bjCOFe3ngTjbBA==,iv:v5M/Ws9d4yBAMFZ13qJ6hkLPceT7a2wcxiJjVp8mvSQ=,tag:zAWPg4H7E2Eavq+iE3yXpg==,type:str]
-sops:
-    kms: []
-    gcp_kms: []
-    azure_kv: []
-    lastmodified: '2020-07-05T19:01:53Z'
-    mac: ENC[AES256_GCM,data:CrYKSxkKZynq9wwD11GE280VIwv0FqFRNgm5EF588fTN4RwVs8s51DoN4Qx9kPoabYH/lwv+OdeVRq9mbYxtclhJh6ind04pmz5UZps/V5PgJDFd0ckLc9SCeqnEmvBFsp9WM+Tr6M/v9QgeamK+GGovw0+ePwgU1VADPnoyTAo=,iv:kgtewrlBa2N3qyhd7ipTZSxMQndvTy2p8PIM3lynrNY=,tag:aUzPq+u2fi5zziYXVfdaYQ==,type:str]
-    pgp:
-    -   created_at: '2020-07-05T19:01:34Z'
-        enc: |
-            -----BEGIN PGP MESSAGE-----
-
-            hQEMA/m6nevQP1fAAQgAnUb/ShUMr5vkDLG+LWGD8DT6etv3kPoJIhq7C0d7y/BX
-            0UHTcxR4coZ55jB6+juxGmh9e9WhawoxHToUs/edxJHxOlC19HunWv9EvTFkKYVf
-            MAFu+Gfx6cWgDPOrrtvFVZ3YUqPizoOUmP/Op5y/gxhKEYBtD1/5YuSGNnL1VYkv
-            ZEfgPYtAq5Jmx+jF2Smkb/T6cWFV79WUJTZbYRQs466qQHtZGU9Ms9amxQ73Xf/Y
-            KhysQCu1yuVxGzBuPVrT5jbZdgaHm5KlmSIGwk47m+PH4ienkhE76WTUCr4xx9R8
-            n8/+eVga9cYWbwHYoY84GNUi7fbx5LTD3x19LnVk9dJeAahWrgzT3azwJRPH7WdW
-            U8+La2v36cucQ/u7+KraVCofOuNXBsjZOJokte97DtKwqtPXRSbyL8owSA90O3Vh
-            ++zsV3ufM+8TO+9LDAjMqmF0lpQuGexNPafdkuAGdQ==
-            =5GUN
-            -----END PGP MESSAGE-----
-        fp: 7FB89715AADA920D65D25E63F9BA9DEBD03F57C0
-    unencrypted_suffix: _unencrypted
-    version: 3.5.0

pkgs/ssh-to-pgp/main.go

@@ -0,0 +1,112 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"syscall"
+
+	"github.com/Mic92/sops-nix/pkgs/sshkeys"
+	"golang.org/x/crypto/openpgp"
+	"golang.org/x/crypto/openpgp/armor"
+	"golang.org/x/crypto/ssh/terminal"
+)
+
+type options struct {
+	publicKey, privateKey, format, out string
+}
+
+func parseFlags(args []string) options {
+	var opts options
+	f := flag.NewFlagSet(args[0], flag.ExitOnError)
+	f.StringVar(&opts.publicKey, "pubkey", "", "Path to public key. Reads from standard input if equal to '-'")
+	f.StringVar(&opts.privateKey, "privkey", "", "Path to private key. Reads from standard input if equal to '-'")
+	f.StringVar(&opts.format, "format", "auto", "GPG format encoding (auto|binary|armor)")
+	f.StringVar(&opts.out, "o", "-", "Output path. Prints by default to standard output")
+	f.Parse(args[1:])
+
+	if opts.format == "auto" {
+		if opts.out == "-" && terminal.IsTerminal(syscall.Stdout) {
+			opts.format = "armor"
+		} else {
+			opts.format = "binary"
+		}
+	}
+	if opts.publicKey != "" && opts.privateKey != "" {
+		fmt.Fprintln(os.Stderr, "-pubkey and -privkey are mutual exclusive")
+		os.Exit(1)
+	}
+
+	if opts.publicKey == "" && opts.privateKey == "" {
+		fmt.Fprintln(os.Stderr, "Either -pubkey and -privkey must be specified")
+		os.Exit(1)
+	}
+
+	return opts
+}
+
+func convertKeys(args []string) error {
+	opts := parseFlags(args)
+	var err error
+	var sshKey []byte
+	keyPath := opts.privateKey
+	if opts.publicKey != "" {
+		keyPath = opts.publicKey
+	}
+	if keyPath == "-" {
+		sshKey, _ = ioutil.ReadAll(os.Stdin)
+		if err != nil {
+			return fmt.Errorf("error reading stdin: %s", err)
+		}
+	} else {
+		sshKey, err = ioutil.ReadFile(keyPath)
+		if err != nil {
+			return fmt.Errorf("error reading %s: %s", opts.privateKey, err)
+		}
+	}
+
+	writer := io.WriteCloser(os.Stdout)
+	if opts.out != "-" {
+		writer, err = os.Create(opts.out)
+		if err != nil {
+			return fmt.Errorf("failed to create %s: %s", opts.out, err)
+		}
+		defer writer.Close()
+	}
+
+	if opts.format == "armor" {
+		keyType := openpgp.PrivateKeyType
+		if opts.publicKey != "" {
+			keyType = openpgp.PublicKeyType
+		}
+		writer, err = armor.Encode(writer, keyType, make(map[string]string))
+		if err != nil {
+			return fmt.Errorf("failed to encode armor writer")
+		}
+		defer writer.Close()
+	}
+
+	if opts.publicKey != "" {
+		gpgKey, err := sshkeys.SSHPublicKeyToPGP(sshKey)
+		if err != nil {
+			return err
+		}
+		gpgKey.Serialize(writer)
+	} else {
+		gpgKey, err := sshkeys.SSHPrivateKeyToPGP(sshKey)
+		if err != nil {
+			return err
+		}
+		gpgKey.SerializePrivate(writer, nil)
+	}
+	return err
+}
+
+func main() {
+	if err := convertKeys(os.Args); err != nil {
+		fmt.Fprintf(os.Stderr, "%s: %s", os.Args[0], err)
+		os.Exit(1)
+	}
+}

pkgs/ssh-to-pgp/main_test.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"runtime"
+	"testing"
+)
+
+// ok fails the test if an err is not nil.
+func ok(tb testing.TB, err error) {
+	if err != nil {
+		_, file, line, _ := runtime.Caller(1)
+		fmt.Printf("\033[31m%s:%d: unexpected error: %s\033[39m\n\n", filepath.Base(file), line, err.Error())
+		tb.FailNow()
+	}
+}
+
+func TestCli(t *testing.T) {
+	_, filename, _, _ := runtime.Caller(0)
+	assets := path.Join(path.Dir(filename), "test-assets")
+	tempdir, err := ioutil.TempDir("", "testdir")
+	ok(t, err)
+	defer os.RemoveAll(tempdir)
+
+	out := path.Join(tempdir, "out")
+	pubKey := path.Join(assets, "id_rsa.pub")
+	privKey := path.Join(assets, "id_rsa")
+	cmds := [][]string{
+		{"ssh-to-pgp", "-pubkey", pubKey, "-o", out},
+		{"ssh-to-pgp", "-format=armor", "-pubkey", pubKey, "-o", out},
+		{"ssh-to-pgp", "-privkey", privKey, "-o", out},
+		{"ssh-to-pgp", "-format=armor", "-privkey", privKey, "-o", out},
+	}
+	for _, cmd := range cmds {
+		err = convertKeys(cmd)
+		ok(t, err)
+		cmd := exec.Command("gpg", "--with-fingerprint", "--show-key", out)
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		ok(t, cmd.Run())
+	}
+}

pkgs/ssh-to-pgp/shell.nix

@@ -0,0 +1,10 @@
+with import <nixpkgs> {};
+mkShell {
+  nativeBuildInputs = [
+    bashInteractive
+    go
+    delve
+    gnupg
+  ];
+  hardeningDisable = [ "all" ];
+}

pkgs/ssh-to-pgp/test-assets/id_rsa

@@ -0,0 +1,38 @@
+-----BEGIN OPENSSH PRIVATE KEY-----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+-----END OPENSSH PRIVATE KEY-----

pkgs/ssh-to-pgp/test-assets/id_rsa.pub

@@ -0,0 +1 @@
+ssh-rsa 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 joerg@turingmachine

pkgs/sshkeys/convert.go

@@ -0,0 +1,94 @@
+package sshkeys
+
+import (
+	"crypto"
+	"crypto/rsa"
+	"fmt"
+	"reflect"
+	"time"
+
+	"golang.org/x/crypto/openpgp"
+	"golang.org/x/crypto/openpgp/packet"
+	"golang.org/x/crypto/ssh"
+)
+
+func parsePublicKey(publicKey []byte) (*rsa.PublicKey, error) {
+	key, _, _, _, err := ssh.ParseAuthorizedKey(publicKey)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse public ssh key: %s", err)
+	}
+
+	cryptoPublicKey, ok := key.(ssh.CryptoPublicKey)
+
+	if !ok {
+		return nil, fmt.Errorf("Unsupported public key algo: %s", key.Type())
+	}
+
+	rsaKey, ok := cryptoPublicKey.CryptoPublicKey().(*rsa.PublicKey)
+
+	if !ok {
+		return nil, fmt.Errorf("Unsupported public key algo: %s", key.Type())
+	}
+
+	return rsaKey, nil
+}
+
+func SSHPublicKeyToPGP(sshPublicKey []byte) (*packet.PublicKey, error) {
+	rsaKey, err := parsePublicKey(sshPublicKey)
+	if err != nil {
+		return nil, err
+	}
+	return packet.NewRSAPublicKey(time.Unix(0, 0), rsaKey), nil
+}
+
+func parsePrivateKey(sshPrivateKey []byte) (*rsa.PrivateKey, error) {
+	privateKey, err := ssh.ParseRawPrivateKey(sshPrivateKey)
+	if err != nil {
+		panic(err)
+	}
+
+	rsaKey, ok := privateKey.(*rsa.PrivateKey)
+
+	if !ok {
+		return nil, fmt.Errorf("Only RSA keys are supported right now, got: %s", reflect.TypeOf(privateKey))
+	}
+
+	return rsaKey, nil
+}
+
+func SSHPrivateKeyToPGP(sshPrivateKey []byte) (*openpgp.Entity, error) {
+	key, err := parsePrivateKey(sshPrivateKey)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse private ssh key: %s", err)
+	}
+
+	// Let's make keys reproducible
+	timeNull := time.Unix(0, 0)
+
+	gpgKey := &openpgp.Entity{
+		PrimaryKey: packet.NewRSAPublicKey(timeNull, &key.PublicKey),
+		PrivateKey: packet.NewRSAPrivateKey(timeNull, key),
+		Identities: make(map[string]*openpgp.Identity),
+	}
+	uid := packet.NewUserId("root", "", "root@localhost")
+	isPrimaryID := true
+	gpgKey.Identities[uid.Id] = &openpgp.Identity{
+		Name:   uid.Id,
+		UserId: uid,
+		SelfSignature: &packet.Signature{
+			CreationTime:              timeNull,
+			SigType:                   packet.SigTypePositiveCert,
+			PubKeyAlgo:                packet.PubKeyAlgoRSA,
+			Hash:                      crypto.SHA256,
+			IsPrimaryId:               &isPrimaryID,
+			FlagsValid:                true,
+			FlagSign:                  true,
+			FlagCertify:               true,
+			FlagEncryptStorage:        true,
+			FlagEncryptCommunications: true,
+			IssuerKeyId:               &gpgKey.PrimaryKey.KeyId,
+		},
+	}
+
+	return gpgKey, nil
+}