*: developer machine HSPKI credentials
In addition to k8s certificates, prodaccess now issues HSPKI
certificates, with DN=$username.sso.hswaw.net. These are installed into
XDG_CONFIG_HOME (or os equiv).
//go/pki will now automatically attempt to load these certificates. This
means you can now run any pki-dependant tool with -hspki_disable, and
with automatic mTLS!
Change-Id: I5b28e193e7c968d621bab0d42aabd6f0510fed6d
diff --git a/cluster/prodvider/hspki.go b/cluster/prodvider/hspki.go
new file mode 100644
index 0000000..243a424
--- /dev/null
+++ b/cluster/prodvider/hspki.go
@@ -0,0 +1,99 @@
+package main
+
+import (
+ "encoding/pem"
+ "fmt"
+ "time"
+
+ "github.com/cloudflare/cfssl/config"
+ "github.com/cloudflare/cfssl/csr"
+ "github.com/cloudflare/cfssl/helpers"
+ "github.com/cloudflare/cfssl/signer"
+ "github.com/cloudflare/cfssl/signer/local"
+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+ pb "code.hackerspace.pl/hscloud/cluster/prodvider/proto"
+)
+
+func (p *prodvider) hspkiSigner() (*local.Signer, error) {
+ policy := &config.Signing{
+ Profiles: map[string]*config.SigningProfile{
+ "client": &config.SigningProfile{
+ Usage: []string{"signing", "key encipherment", "client auth"},
+ ExpiryString: "30d",
+ },
+ },
+ Default: config.DefaultConfig(),
+ }
+
+ secret, err := p.k8s.CoreV1().Secrets("cert-manager").Get("pki-selfsigned-cert", metav1.GetOptions{})
+ if err != nil {
+ return nil, fmt.Errorf("hspki secret get failed: %w", err)
+ }
+
+ parsedCa, err := helpers.ParseCertificatePEM(secret.Data["tls.crt"])
+ if err != nil {
+ return nil, fmt.Errorf("when parsing tls.crt: %w", err)
+ }
+
+ priv, err := helpers.ParsePrivateKeyPEMWithPassword(secret.Data["tls.key"], nil)
+ if err != nil {
+ return nil, fmt.Errorf("when parsing tls.key: %w", err)
+ }
+
+ return local.NewSigner(priv, parsedCa, signer.DefaultSigAlgo(priv), policy)
+}
+
+func (p *prodvider) hspkiCreds(username string) (*pb.HSPKIKeys, error) {
+ principal := fmt.Sprintf("%s.sso.hswaw.net", username)
+
+ s, err := p.hspkiSigner()
+ if err != nil {
+ return nil, fmt.Errorf("hspkiSigner: %w", err)
+ }
+
+ signerCert, _ := s.Certificate("", "")
+ req := &csr.CertificateRequest{
+ CN: principal,
+ KeyRequest: &csr.BasicKeyRequest{
+ A: "rsa",
+ S: 4096,
+ },
+ Names: []csr.Name{
+ {
+ O: "prodvider",
+ OU: fmt.Sprintf("Prodvider HSPKI Cert for %s", username),
+ },
+ },
+ }
+
+ g := &csr.Generator{
+ Validator: func(req *csr.CertificateRequest) error { return nil },
+ }
+
+ csrPEM, keyPEM, err := g.ProcessRequest(req)
+ if err != nil {
+ return nil, fmt.Errorf("when making CSR: %w", err)
+ }
+
+ signReq := signer.SignRequest{
+ Hosts: []string{},
+ Request: string(csrPEM),
+ Profile: "client",
+ NotAfter: time.Now().Add(9 * time.Hour),
+ }
+
+ certPEM, err := s.Sign(signReq)
+ if err != nil {
+ return nil, fmt.Errorf("when issuing certificate: %w", err)
+ }
+
+ caPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: signerCert.Raw})
+
+ return &pb.HSPKIKeys{
+ Ca: caPEM,
+ Cert: certPEM,
+ Key: keyPEM,
+ Principal: principal,
+ }, nil
+}