From 703c96b2166b0ea43b58853b4d202f60e281815b Mon Sep 17 00:00:00 2001
From: shibayan <me@shibayan.jp>
Date: Wed, 30 Jan 2019 18:10:58 +0900
Subject: [PATCH] Fixed DNS validation error in SAN certificate

---
 AzureKeyVault.LetsEncrypt/SharedFunctions.cs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/AzureKeyVault.LetsEncrypt/SharedFunctions.cs b/AzureKeyVault.LetsEncrypt/SharedFunctions.cs
index 5e3aa421..d92bb425 100644
--- a/AzureKeyVault.LetsEncrypt/SharedFunctions.cs
+++ b/AzureKeyVault.LetsEncrypt/SharedFunctions.cs
@@ -205,18 +205,18 @@ public static async Task CheckIsDnsRecord([ActivityTrigger] DurableActivityConte
             // 実際に ACME の TXT レコードを引いて確認する
             var queryResult = await _lookupClient.QueryAsync(challenge.DnsRecordName, QueryType.TXT);
 
-            var txtRecord = queryResult.Answers
+            var txtRecords = queryResult.Answers
                                        .OfType<DnsClient.Protocol.TxtRecord>()
-                                       .FirstOrDefault();
+                                       .ToArray();
 
             // レコードが存在しなかった場合はエラー
-            if (txtRecord == null)
+            if (txtRecords.Length == 0)
             {
                 throw new InvalidOperationException($"{challenge.DnsRecordName} did not resolve.");
             }
 
             // レコードに今回のチャレンジが含まれていない場合もエラー
-            if (!txtRecord.Text.Contains(challenge.DnsRecordValue))
+            if (!txtRecords.Any(x => x.Text.Contains(challenge.DnsRecordValue)))
             {
                 throw new InvalidOperationException($"{challenge.DnsRecordName} value is not correct.");
             }