42 lines
1.3 KiB
Go
42 lines
1.3 KiB
Go
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package main
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import (
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"crypto/ed25519"
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"strings"
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"testing"
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)
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func TestSignFirmwareProducesVerifiableManifest(t *testing.T) {
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content := []byte("deterministic firmware fixture")
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result, err := signFirmware("terminal-a", "rev-b", "1.2.3", content)
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if err != nil {
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t.Fatal(err)
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}
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digest := sha256.Sum256(content)
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if result.SHA256 != hex.EncodeToString(digest[:]) || result.Size != len(content) {
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t.Fatalf("digest=%s size=%d", result.SHA256, result.Size)
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}
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for _, fragment := range []string{"model=terminal-a", "hardware_revision=rev-b", "version=1.2.3", "sha256=" + result.SHA256} {
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if !strings.Contains(result.Manifest, fragment) {
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t.Fatalf("manifest missing %q: %s", fragment, result.Manifest)
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}
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}
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publicKey, err := base64.StdEncoding.DecodeString(result.PublicKeyBase64)
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if err != nil {
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t.Fatal(err)
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}
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signature, err := base64.StdEncoding.DecodeString(result.SignatureBase64)
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if err != nil {
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t.Fatal(err)
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}
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if !ed25519.Verify(ed25519.PublicKey(publicKey), []byte(result.Manifest), signature) {
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t.Fatal("firmware signature did not verify")
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}
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if ed25519.Verify(ed25519.PublicKey(publicKey), []byte(result.Manifest+"tampered"), signature) {
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t.Fatal("tampered manifest unexpectedly verified")
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}
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}
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