81 lines
2.9 KiB
Go
81 lines
2.9 KiB
Go
package tlsreload
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import (
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"crypto/x509"
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"crypto/x509/pkix"
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"encoding/pem"
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"math/big"
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"net/url"
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"os"
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"path/filepath"
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"testing"
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"time"
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)
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func TestResolveSPIFFEIdentityUsesExactRoleSpecificURI(t *testing.T) {
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certificatePath, keyPath := writeWorkloadCertificate(t, "gateway-a", "spiffe://proxy-pool.local/production/worker/gateway-a")
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identity, err := ResolveSPIFFEIdentity(certificatePath, keyPath, "proxy-pool.local", "production", "worker")
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if err != nil || identity != "gateway-a" {
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t.Fatalf("ResolveSPIFFEIdentity() = (%q, %v), want (gateway-a, nil)", identity, err)
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}
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if _, err := ResolveSPIFFEIdentity(certificatePath, keyPath, "proxy-pool.local", "production", "checker"); err == nil {
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t.Fatal("ResolveSPIFFEIdentity(checker) error = nil")
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}
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}
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func TestResolveSPIFFEIdentityRejectsMultipleMatchingURIs(t *testing.T) {
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certificatePath, keyPath := writeWorkloadCertificate(t, "gateway-a",
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"spiffe://proxy-pool.local/production/worker/gateway-a",
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"spiffe://proxy-pool.local/production/worker/gateway-b",
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)
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if _, err := ResolveSPIFFEIdentity(certificatePath, keyPath, "proxy-pool.local", "production", "worker"); err == nil {
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t.Fatal("ResolveSPIFFEIdentity(multiple identities) error = nil")
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}
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}
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func writeWorkloadCertificate(t *testing.T, commonName string, identityURIs ...string) (string, string) {
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t.Helper()
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directory := t.TempDir()
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certificatePath := filepath.Join(directory, "tls.crt")
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keyPath := filepath.Join(directory, "tls.key")
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privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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t.Fatalf("generate workload key: %v", err)
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}
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identities := make([]*url.URL, 0, len(identityURIs))
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for _, raw := range identityURIs {
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identity, parseErr := url.Parse(raw)
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if parseErr != nil {
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t.Fatalf("parse workload identity: %v", parseErr)
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}
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identities = append(identities, identity)
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}
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now := time.Now()
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template := &x509.Certificate{
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SerialNumber: big.NewInt(now.UnixNano()), Subject: pkix.Name{CommonName: commonName},
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URIs: identities, NotBefore: now.Add(-time.Minute), NotAfter: now.Add(time.Hour),
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KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment,
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ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
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}
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der, err := x509.CreateCertificate(rand.Reader, template, template, &privateKey.PublicKey, privateKey)
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if err != nil {
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t.Fatalf("create workload certificate: %v", err)
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}
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certificate := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: der})
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privateDER, err := x509.MarshalPKCS8PrivateKey(privateKey)
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if err != nil {
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t.Fatalf("marshal workload key: %v", err)
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}
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key := pem.EncodeToMemory(&pem.Block{Type: "PRIVATE KEY", Bytes: privateDER})
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if err := os.WriteFile(certificatePath, certificate, 0o600); err != nil {
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t.Fatalf("write workload certificate: %v", err)
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}
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if err := os.WriteFile(keyPath, key, 0o600); err != nil {
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t.Fatalf("write workload key: %v", err)
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}
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return certificatePath, keyPath
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}
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