fix decrypt windows unit-tests

.github/workflows/go.yml

@@ -16,13 +16,15 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.17
+        go-version: 1.23
 
     - name: Build
       run: go build -v ./...
 
     - name: Test
       run: go test -v ./...
+      env:
+        CGO_ENABLED: "0"
 
   build_windows:
     runs-on: windows-latest
@@ -32,10 +34,12 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.17
+        go-version: 1.23
 
     - name: Build
       run: go build -v ./...
 
     - name: Test
       run: go test -v ./...
+      env:
+        CGO_ENABLED: "0"

.gitignore

@@ -13,3 +13,4 @@ vmextension/testdir/
 vendor/
 pkg/utils/configTemp/
 pkg/utils/downloadTemp/
+pkg/settings/testdir/

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "go.testEnvVars": {
+        "CGO_ENABLED": "0"
+    }
+}

pkg/encrypt/encrypt_windows.go

@@ -5,10 +5,11 @@ package encrypt
 import (
 	"encoding/hex"
 	"fmt"
-	"github.com/Azure/azure-extension-platform/pkg/internal/crypto"
-	"golang.org/x/sys/windows"
 	"syscall"
 	"unsafe"
+
+	"github.com/Azure/azure-extension-platform/pkg/internal/crypto"
+	"golang.org/x/sys/windows"
 )
 
 const (
@@ -30,7 +31,7 @@ func (cHandler *certHandler) GetThumbprint() (certThumbprint string, err error)
 
 func (cHandler *certHandler) Encrypt(bytesToEncrypt []byte) (encryptedBytes []byte, err error) {
 	alg := szOID_RSA_RC4
-	buffer := []byte(alg)
+	buffer := append([]byte(alg), 0) // null-terminate for the C API
 	procCryptEncryptMessage := crypto.Modcrypt32.NewProc("CryptEncryptMessage")
 	cai := crypto.CryptAlgorithmIdentifier{
 		PszObjID: uintptr(unsafe.Pointer(&buffer[0])),