Pulse/internal/dockeragent/signature_test.go
2026-04-22 02:00:29 +01:00

121 lines
3.4 KiB
Go

package dockeragent
import (
"crypto/ed25519"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"os"
"testing"
"github.com/rcourtman/pulse-go-rewrite/internal/updatesignature"
)
func TestVerifySignature(t *testing.T) {
originalKeys := updatesignature.EmbeddedTrustedPublicKeys
defer func() {
updatesignature.EmbeddedTrustedPublicKeys = originalKeys
}()
publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
if err != nil {
t.Fatalf("generate key: %v", err)
}
pubBytes, err := x509.MarshalPKIXPublicKey(publicKey)
if err != nil {
t.Fatalf("marshal public key: %v", err)
}
updatesignature.EmbeddedTrustedPublicKeys = string(pem.EncodeToMemory(&pem.Block{Type: "PUBLIC KEY", Bytes: pubBytes}))
data := []byte("payload")
sig := ed25519.Sign(privateKey, data)
signature := base64.StdEncoding.EncodeToString(sig)
if err := verifySignature(data, signature); err != nil {
t.Fatalf("expected signature to verify: %v", err)
}
if err := verifySignature(data, ""); err == nil {
t.Fatal("expected missing signature error")
}
if err := verifySignature(data, "!!!"); err == nil {
t.Fatal("expected invalid base64 error")
}
// Invalid signature
invalidSig := base64.StdEncoding.EncodeToString([]byte("bad"))
if err := verifySignature(data, invalidSig); err == nil {
t.Fatal("expected invalid signature error")
}
}
func TestVerifySignatureInvalidKeys(t *testing.T) {
originalKeys := updatesignature.EmbeddedTrustedPublicKeys
defer func() {
updatesignature.EmbeddedTrustedPublicKeys = originalKeys
}()
updatesignature.EmbeddedTrustedPublicKeys = "not-pem"
if err := verifySignature([]byte("data"), base64.StdEncoding.EncodeToString([]byte("sig"))); err == nil {
t.Fatal("expected error for invalid pem")
}
rsaKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
t.Fatalf("generate rsa: %v", err)
}
pubBytes, err := x509.MarshalPKIXPublicKey(&rsaKey.PublicKey)
if err != nil {
t.Fatalf("marshal rsa: %v", err)
}
updatesignature.EmbeddedTrustedPublicKeys = string(pem.EncodeToMemory(&pem.Block{Type: "PUBLIC KEY", Bytes: pubBytes}))
if err := verifySignature([]byte("data"), base64.StdEncoding.EncodeToString([]byte("sig"))); err == nil {
t.Fatal("expected error for non-ed25519 key")
}
}
func TestVerifyFileSignature(t *testing.T) {
originalKeys := updatesignature.EmbeddedTrustedPublicKeys
defer func() {
updatesignature.EmbeddedTrustedPublicKeys = originalKeys
}()
publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
if err != nil {
t.Fatalf("generate key: %v", err)
}
pubBytes, err := x509.MarshalPKIXPublicKey(publicKey)
if err != nil {
t.Fatalf("marshal public key: %v", err)
}
updatesignature.EmbeddedTrustedPublicKeys = string(pem.EncodeToMemory(&pem.Block{Type: "PUBLIC KEY", Bytes: pubBytes}))
file := filepathJoin(t)
data := []byte("file")
if err := os.WriteFile(file, data, 0600); err != nil {
t.Fatalf("write file: %v", err)
}
sig := ed25519.Sign(privateKey, data)
signature := base64.StdEncoding.EncodeToString(sig)
if err := verifyFileSignature(file, signature); err != nil {
t.Fatalf("expected file signature to verify: %v", err)
}
if err := verifyFileSignature("missing", signature); err == nil {
t.Fatal("expected error for missing file")
}
if err := verifyFileSignature(file, "!!!"); err == nil {
t.Fatal("expected base64 error")
}
}
func filepathJoin(t *testing.T) string {
t.Helper()
tmp := t.TempDir()
return tmp + "/payload"
}