Added environment variable flat MT_FIPS_ENABLE to force FIPS-compliant algorithms when generating Guids using hashes

Author: phatboyg

src/MassTransit/JobService/JobService/JobMetadataCache.cs

@@ -13,22 +13,7 @@ public static Guid GenerateJobTypeId(string queueName)
         {
             var key = GenerateJobTypeName(queueName);
 
-            if (CryptoConfig.AllowOnlyFipsAlgorithms)
-            {
-                using var hasher = SHA256.Create();
-
-                var data = hasher.ComputeHash(Encoding.UTF8.GetBytes(key));
-
-                return new Guid(new ReadOnlySpan<byte>(data, 0, 16).ToArray());
-            }
-            else
-            {
-                using var hasher = MD5.Create();
-
-                var data = hasher.ComputeHash(Encoding.UTF8.GetBytes(key));
-
-                return new Guid(data);
-            }
+            return JobMetadataCache.GenerateHashGuid(key);
         }
 
         public static string GenerateJobTypeName(string queueName)
@@ -50,7 +35,31 @@ public static Guid GenerateRecurringJobId(string jobName)
         {
             var key = GenerateJobTypeName(jobName);
 
-            if (CryptoConfig.AllowOnlyFipsAlgorithms)
+            return JobMetadataCache.GenerateHashGuid(key);
+        }
+
+        public static string GenerateJobTypeName(string jobName)
+        {
+            var jobTypeName = TypeCache<TJob>.ShortName;
+
+            var name = $"{jobTypeName}:{jobName}";
+
+            return name;
+        }
+    }
+
+
+    static class JobMetadataCache
+    {
+        static bool? _fipsMode;
+
+        public static bool IsFipsMode =>
+            CryptoConfig.AllowOnlyFipsAlgorithms ||
+            (_fipsMode ??= bool.TryParse(Environment.GetEnvironmentVariable("MT_FIPS_ENABLE"), out var fipsMode) && fipsMode);
+
+        public static Guid GenerateHashGuid(string key)
+        {
+            if (IsFipsMode)
             {
                 using var hasher = SHA256.Create();
 
@@ -67,14 +76,5 @@ public static Guid GenerateRecurringJobId(string jobName)
                 return new Guid(data);
             }
         }
-
-        public static string GenerateJobTypeName(string jobName)
-        {
-            var jobTypeName = TypeCache<TJob>.ShortName;
-
-            var name = $"{jobTypeName}:{jobName}";
-
-            return name;
-        }
     }
 }