forked from TrueCloudLab/certificates
Merge pull request #741 from gdbelvin/ssh
Support CSR Requests from PKCS11
This commit is contained in:
Mariano Cano
GitHub
commit
91878051c1
1 changed files with 130 additions and 76 deletions
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@ -32,7 +32,7 @@ import (
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// Config is a mapping of the cli flags.
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type Config struct {
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KMS string
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RootOnly bool
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GenerateRoot bool
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RootObject string
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RootKeyObject string
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RootSubject string
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@ -58,22 +58,29 @@ func (c *Config) Validate() error {
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switch {
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case c.KMS == "":
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return errors.New("flag `--kms` is required")
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case c.CrtPath == "":
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return errors.New("flag `--crt-cert-path` is required")
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case c.RootFile != "" && c.KeyFile == "":
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return errors.New("flag `--root` requires flag `--key`")
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return errors.New("flag `--root-cert-file` requires flag `--root-key-file`")
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case c.KeyFile != "" && c.RootFile == "":
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return errors.New("flag `--key` requires flag `--root`")
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case c.RootOnly && c.RootFile != "":
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return errors.New("flag `--root-only` is incompatible with flag `--root`")
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return errors.New("flag `--root-key-file` requires flag `--root-cert-file`")
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case c.RootFile == "" && c.RootObject == "":
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return errors.New("one of flag `--root` or `--root-cert` is required")
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case c.RootFile == "" && c.RootKeyObject == "":
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return errors.New("one of flag `--root` or `--root-key` is required")
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return errors.New("one of flag `--root-cert-file` or `--root-cert-obj` is required")
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case c.KeyFile == "" && c.RootKeyObject == "":
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return errors.New("one of flag `--root-key-file` or `--root-key-obj` is required")
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case c.CrtKeyPath == "" && c.CrtKeyObject == "":
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return errors.New("one of flag `--crt-key-path` or `--crt-key-obj` is required")
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case c.RootFile == "" && c.GenerateRoot && c.RootKeyObject == "":
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return errors.New("flag `--root-gen` requires flag `--root-key-obj`")
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case c.RootFile == "" && c.GenerateRoot && c.RootPath == "":
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return errors.New("flag `--root-gen` requires `--root-cert-path`")
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default:
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if c.RootFile != "" {
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c.GenerateRoot = false
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c.RootObject = ""
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c.RootKeyObject = ""
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}
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if c.RootOnly {
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if c.CrtKeyPath != "" {
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c.CrtObject = ""
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c.CrtKeyObject = ""
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}
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@ -101,21 +108,27 @@ func main() {
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var c Config
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flag.StringVar(&c.KMS, "kms", kmsuri, "PKCS #11 URI with the module-path and token to connect to the module.")
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flag.StringVar(&c.Pin, "pin", "", "PKCS #11 PIN")
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flag.StringVar(&c.RootObject, "root-cert", "pkcs11:id=7330;object=root-cert", "PKCS #11 URI with object id and label to store the root certificate.")
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flag.StringVar(&c.RootPath, "root-cert-path", "root_ca.crt", "Location to write the root certificate.")
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flag.StringVar(&c.RootKeyObject, "root-key", "pkcs11:id=7330;object=root-key", "PKCS #11 URI with object id and label to store the root key.")
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// Option 1: Generate new root
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flag.BoolVar(&c.GenerateRoot, "root-gen", true, "Enable the generation of a root key.")
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flag.StringVar(&c.RootSubject, "root-name", "PKCS #11 Smallstep Root", "Subject and Issuer of the root certificate.")
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flag.StringVar(&c.CrtObject, "crt-cert", "pkcs11:id=7331;object=intermediate-cert", "PKCS #11 URI with object id and label to store the intermediate certificate.")
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flag.StringVar(&c.CrtPath, "crt-cert-path", "intermediate_ca.crt", "Location to write the intermediate certificate.")
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flag.StringVar(&c.CrtKeyObject, "crt-key", "pkcs11:id=7331;object=intermediate-key", "PKCS #11 URI with object id and label to store the intermediate certificate.")
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flag.StringVar(&c.RootObject, "root-cert-obj", "pkcs11:id=7330;object=root-cert", "PKCS #11 URI with object id and label to store the root certificate.")
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flag.StringVar(&c.RootKeyObject, "root-key-obj", "pkcs11:id=7330;object=root-key", "PKCS #11 URI with object id and label to store the root key.")
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// Option 2: Read root from disk and sign intermediate
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flag.StringVar(&c.RootFile, "root-cert-file", "", "Path to the root certificate to use.")
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flag.StringVar(&c.KeyFile, "root-key-file", "", "Path to the root key to use.")
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// Option 3: Generate certificate signing request
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flag.StringVar(&c.CrtSubject, "crt-name", "PKCS #11 Smallstep Intermediate", "Subject of the intermediate certificate.")
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flag.StringVar(&c.CrtKeyPath, "crt-key-path", "intermediate_ca_key", "Location to write the intermediate private key.")
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flag.StringVar(&c.CrtObject, "crt-cert-obj", "pkcs11:id=7331;object=intermediate-cert", "PKCS #11 URI with object id and label to store the intermediate certificate.")
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flag.StringVar(&c.CrtKeyObject, "crt-key-obj", "pkcs11:id=7331;object=intermediate-key", "PKCS #11 URI with object id and label to store the intermediate certificate.")
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// SSH certificates
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flag.BoolVar(&c.EnableSSH, "ssh", false, "Enable the creation of ssh keys.")
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flag.StringVar(&c.SSHHostKeyObject, "ssh-host-key", "pkcs11:id=7332;object=ssh-host-key", "PKCS #11 URI with object id and label to store the key used to sign SSH host certificates.")
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flag.StringVar(&c.SSHUserKeyObject, "ssh-user-key", "pkcs11:id=7333;object=ssh-user-key", "PKCS #11 URI with object id and label to store the key used to sign SSH user certificates.")
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flag.BoolVar(&c.RootOnly, "root-only", false, "Store only only the root certificate and sign and intermediate.")
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flag.StringVar(&c.RootFile, "root", "", "Path to the root certificate to use.")
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flag.StringVar(&c.KeyFile, "key", "", "Path to the root key to use.")
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flag.BoolVar(&c.EnableSSH, "ssh", false, "Enable the creation of ssh keys.")
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// Output files
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flag.StringVar(&c.RootPath, "root-cert-path", "root_ca.crt", "Location to write the root certificate.")
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flag.StringVar(&c.CrtPath, "crt-cert-path", "intermediate_ca.crt", "Location to write the intermediate certificate.")
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flag.StringVar(&c.CrtKeyPath, "crt-key-path", "", "Location to write the intermediate private key.")
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// Others
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flag.BoolVar(&c.NoCerts, "no-certs", false, "Do not store certificates in the module.")
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flag.BoolVar(&c.Force, "force", false, "Force the delete of previous keys.")
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flag.BoolVar(&c.Extractable, "extractable", false, "Allow export of private keys under wrap.")
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@ -276,22 +289,8 @@ func createPKI(k kms.KeyManager, c Config) error {
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// Root Certificate
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var signer crypto.Signer
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var root *x509.Certificate
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if c.RootFile != "" && c.KeyFile != "" {
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root, err = pemutil.ReadCertificate(c.RootFile)
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if err != nil {
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return err
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}
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key, err := pemutil.Read(c.KeyFile)
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if err != nil {
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return err
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}
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var ok bool
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if signer, ok = key.(crypto.Signer); !ok {
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return errors.Errorf("key type '%T' does not implement a signer", key)
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}
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} else {
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switch {
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case c.GenerateRoot:
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resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
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Name: c.RootKeyObject,
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SignatureAlgorithm: apiv1.ECDSAWithSHA256,
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@ -331,7 +330,7 @@ func createPKI(k kms.KeyManager, c Config) error {
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return errors.Wrap(err, "error parsing root certificate")
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}
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if cm, ok := k.(kms.CertificateManager); ok && !c.NoCerts {
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if cm, ok := k.(kms.CertificateManager); ok && c.RootObject != "" && !c.NoCerts {
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if err := cm.StoreCertificate(&apiv1.StoreCertificateRequest{
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Name: c.RootObject,
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Certificate: root,
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@ -339,6 +338,8 @@ func createPKI(k kms.KeyManager, c Config) error {
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}); err != nil {
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return err
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}
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} else {
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c.RootObject = ""
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}
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if err := fileutil.WriteFile(c.RootPath, pem.EncodeToMemory(&pem.Block{
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@ -350,12 +351,31 @@ func createPKI(k kms.KeyManager, c Config) error {
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ui.PrintSelected("Root Key", resp.Name)
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ui.PrintSelected("Root Certificate", c.RootPath)
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if c.RootObject != "" {
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ui.PrintSelected("Root Certificate Object", c.RootObject)
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}
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case c.RootFile != "" && c.KeyFile != "": // Read Root From File
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root, err = pemutil.ReadCertificate(c.RootFile)
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if err != nil {
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return err
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}
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key, err := pemutil.Read(c.KeyFile)
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if err != nil {
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return err
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}
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var ok bool
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if signer, ok = key.(crypto.Signer); !ok {
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return errors.Errorf("key type '%T' does not implement a signer", key)
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}
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}
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// Intermediate Certificate
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var keyName string
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var publicKey crypto.PublicKey
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if c.RootOnly {
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var intSigner crypto.Signer
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if c.CrtKeyPath != "" {
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priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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return errors.Wrap(err, "error creating intermediate key")
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@ -373,6 +393,7 @@ func createPKI(k kms.KeyManager, c Config) error {
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}
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publicKey = priv.Public()
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intSigner = priv
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} else {
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resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
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Name: c.CrtKeyObject,
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@ -384,56 +405,89 @@ func createPKI(k kms.KeyManager, c Config) error {
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}
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publicKey = resp.PublicKey
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keyName = resp.Name
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}
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template := &x509.Certificate{
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IsCA: true,
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NotBefore: now,
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NotAfter: now.Add(time.Hour * 24 * 365 * 10),
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KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
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BasicConstraintsValid: true,
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MaxPathLen: 0,
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MaxPathLenZero: true,
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Issuer: root.Subject,
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Subject: pkix.Name{CommonName: c.CrtSubject},
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SerialNumber: mustSerialNumber(),
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SubjectKeyId: mustSubjectKeyID(publicKey),
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}
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b, err := x509.CreateCertificate(rand.Reader, template, root, publicKey, signer)
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if err != nil {
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return err
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}
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intermediate, err := x509.ParseCertificate(b)
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if err != nil {
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return errors.Wrap(err, "error parsing intermediate certificate")
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}
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if cm, ok := k.(kms.CertificateManager); ok && !c.NoCerts {
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if err := cm.StoreCertificate(&apiv1.StoreCertificateRequest{
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Name: c.CrtObject,
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Certificate: intermediate,
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Extractable: c.Extractable,
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}); err != nil {
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intSigner, err = k.CreateSigner(&resp.CreateSignerRequest)
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if err != nil {
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return err
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}
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}
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if err := fileutil.WriteFile(c.CrtPath, pem.EncodeToMemory(&pem.Block{
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Type: "CERTIFICATE",
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Bytes: b,
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}), 0600); err != nil {
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return err
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if root != nil {
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template := &x509.Certificate{
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IsCA: true,
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NotBefore: now,
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NotAfter: now.Add(time.Hour * 24 * 365 * 10),
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KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
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BasicConstraintsValid: true,
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MaxPathLen: 0,
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MaxPathLenZero: true,
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Issuer: root.Subject,
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Subject: pkix.Name{CommonName: c.CrtSubject},
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SerialNumber: mustSerialNumber(),
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SubjectKeyId: mustSubjectKeyID(publicKey),
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}
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b, err := x509.CreateCertificate(rand.Reader, template, root, publicKey, signer)
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if err != nil {
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return err
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}
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intermediate, err := x509.ParseCertificate(b)
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if err != nil {
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return errors.Wrap(err, "error parsing intermediate certificate")
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}
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if cm, ok := k.(kms.CertificateManager); ok && c.CrtObject != "" && !c.NoCerts {
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if err := cm.StoreCertificate(&apiv1.StoreCertificateRequest{
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Name: c.CrtObject,
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Certificate: intermediate,
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Extractable: c.Extractable,
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}); err != nil {
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return err
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}
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} else {
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c.CrtObject = ""
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}
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if err := fileutil.WriteFile(c.CrtPath, pem.EncodeToMemory(&pem.Block{
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Type: "CERTIFICATE",
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Bytes: b,
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}), 0600); err != nil {
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return err
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}
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} else {
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// No root available, generate CSR for external root.
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csrTemplate := x509.CertificateRequest{
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Subject: pkix.Name{CommonName: c.CrtSubject},
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SignatureAlgorithm: x509.ECDSAWithSHA256,
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}
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// step: generate the csr request
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csrCertificate, err := x509.CreateCertificateRequest(rand.Reader, &csrTemplate, intSigner)
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if err != nil {
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return err
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}
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if err := fileutil.WriteFile(c.CrtPath, pem.EncodeToMemory(&pem.Block{
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Type: "CERTIFICATE REQUEST",
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Bytes: csrCertificate,
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}), 0600); err != nil {
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return err
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}
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}
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if c.RootOnly {
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if c.CrtKeyPath != "" {
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ui.PrintSelected("Intermediate Key", c.CrtKeyPath)
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} else {
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ui.PrintSelected("Intermediate Key", keyName)
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}
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ui.PrintSelected("Intermediate Certificate", c.CrtPath)
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if root != nil {
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ui.PrintSelected("Intermediate Certificate", c.CrtPath)
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if c.CrtObject != "" {
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ui.PrintSelected("Intermediate Certificate Object", c.CrtObject)
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}
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} else {
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ui.PrintSelected("Intermediate Certificate Request", c.CrtPath)
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}
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if c.SSHHostKeyObject != "" {
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resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
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