fix LoadCertificate unit test

replaced certificate with invalid dns name, which is rejected by stdlib of Go version >=1.25.2.

Change in Go introduced by https://github.com/golang/go/issues/75715

internal/certs/certs_test.go

@@ -26,7 +26,7 @@ func TestLoadCertificates(t *testing.T) {
 
 	// Try to load cert that is not protected, expect success.
 	if cert, err := LoadCertificate(&testCert, &testKey, nil); cert == nil || err != nil {
-		t.Errorf("Failure: Couldn't load supposedly valid certificate.")
+		t.Errorf("Failure: Couldn't load supposedly valid certificate. Got error: %v", err)
 	}
 	// Try to load no cert, expect error.
 	if cert, err := LoadCertificate(nil, &testKey, nil); cert != nil || err == nil {
@@ -46,7 +46,7 @@ func TestLoadCertificates(t *testing.T) {
 	}
 	// Try to load encrypted cert, expecting success.
 	if cert, err := LoadCertificate(&privateCert, &privateKey, &passphrase); cert == nil || err != nil {
-		t.Errorf("Failure: Couldn't load supposedly valid encrypted certificate.")
+		t.Errorf("Failure: Couldn't load supposedly valid encrypted certificate. Got error: %v", err)
 	}
 	// Try to load wrong encrypted cert, expecting error.
 	if cert, err := LoadCertificate(&testKey, &privateKey, &passphrase); cert != nil || err == nil {
@@ -56,8 +56,8 @@ func TestLoadCertificates(t *testing.T) {
 	if cert, err := LoadCertificate(&missingCert, &privateKey, &passphrase); cert != nil || err == nil {
 		t.Errorf("Failure: No Failure while loading nonexistens certificate.")
 	}
-	// Try to load nonexistent encrypted cert, expecting error.
+	// Try to load nonexistent encrypted cert, expecting success.
 	if cert, err := LoadCertificate(nil, nil, nil); cert != nil || err != nil {
-		t.Errorf("Failure: Expected nil return.")
+		t.Errorf("Failure: Expected nil return. Got error: %v", err)
 	}
 }

internal/certs/data/cert.crt

@@ -1,37 +1,24 @@
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----

internal/certs/data/privated.pem

@@ -1,42 +1,30 @@
 -----BEGIN RSA PRIVATE KEY-----
 Proc-Type: 4,ENCRYPTED
-DEK-Info: DES-CBC,054A583F6C90570F
+DEK-Info: AES-256-CBC,C5C31E426EA6F3F488B4AF17D3F44B3B
 
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 -----END RSA PRIVATE KEY-----