From 94f52f0d7c2080455985e1651af765e3c8499423 Mon Sep 17 00:00:00 2001
From: Paul Meyer <49727155+katexochen@users.noreply.github.com>
Date: Mon, 12 Aug 2024 15:28:00 +0200
Subject: [PATCH] client.GetQuoteProvider: return error if none supported

Signed-off-by: Paul Meyer <49727155+katexochen@users.noreply.github.com>
---
 client/client_linux.go | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/client/client_linux.go b/client/client_linux.go
index 72ed35d..b7b81bf 100644
--- a/client/client_linux.go
+++ b/client/client_linux.go
@@ -235,18 +235,28 @@ func (*LinuxConfigFsQuoteProvider) Product() *spb.SevProduct {
 
 // GetQuoteProvider returns a supported SEV-SNP QuoteProvider.
 func GetQuoteProvider() (QuoteProvider, error) {
-	preferred := &LinuxConfigFsQuoteProvider{}
-	if !preferred.IsSupported() {
-		return &LinuxIoctlQuoteProvider{}, nil
+	var provider QuoteProvider
+	provider = &LinuxConfigFsQuoteProvider{}
+	if provider.IsSupported() {
+		return provider, nil
 	}
-	return preferred, nil
+	provider = &LinuxIoctlQuoteProvider{}
+	if provider.IsSupported() {
+		return provider, nil
+	}
+	return nil, fmt.Errorf("no supported SEV-SNP QuoteProvider found")
 }
 
 // GetLeveledQuoteProvider returns a supported SEV-SNP LeveledQuoteProvider.
 func GetLeveledQuoteProvider() (LeveledQuoteProvider, error) {
-	preferred := &LinuxConfigFsQuoteProvider{}
-	if !preferred.IsSupported() {
-		return &LinuxIoctlQuoteProvider{}, nil
+	var provider LeveledQuoteProvider
+	provider = &LinuxConfigFsQuoteProvider{}
+	if provider.IsSupported() {
+		return provider, nil
+	}
+	provider = &LinuxIoctlQuoteProvider{}
+	if provider.IsSupported() {
+		return provider, nil
 	}
-	return preferred, nil
+	return nil, fmt.Errorf("no supported SEV-SNP LeveledQuoteProvider found")
 }