(GH-1047) Add additional hash stream options to Providers

src/chocolatey/infrastructure/adapters/HashAlgorithm.cs

@@ -1,5 +1,6 @@
 namespace chocolatey.infrastructure.adapters
 {
+    using System.IO;
     using cryptography;
 
     public sealed class HashAlgorithm : IHashAlgorithm
@@ -15,5 +16,10 @@ public byte[] ComputeHash(byte[] buffer)
         {
             return _algorithm.ComputeHash(buffer);
         }
+
+        public byte[] ComputeHash(Stream stream)
+        {
+            return _algorithm.ComputeHash(stream);
+        }
     }
 }

src/chocolatey/infrastructure/adapters/IHashAlgorithm.cs

@@ -1,10 +1,13 @@
 namespace chocolatey.infrastructure.adapters
 {
+    using System.IO;
     // ReSharper disable InconsistentNaming
 
     public interface IHashAlgorithm
     {
         byte[] ComputeHash(byte[] buffer);
+
+        byte[] ComputeHash(Stream stream);
     }
 
     // ReSharper restore InconsistentNaming

src/chocolatey/infrastructure/cryptography/CryptoHashProvider.cs

@@ -1,4 +1,4 @@
-// Copyright © 2011 - Present RealDimensions Software, LLC
+// Copyright � 2011 - Present RealDimensions Software, LLC
 // 
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -107,6 +107,20 @@ public string hash_file(string filePath)
             }
         }
 
+        public string hash_byte_array(byte[] buffer)
+        {                
+            var hash = _hashAlgorithm.ComputeHash(buffer);
+
+            return BitConverter.ToString(hash).Replace("-", string.Empty);
+        }
+
+        public string hash_stream(Stream inputStream)
+        {                
+            var hash = _hashAlgorithm.ComputeHash(inputStream);
+
+            return BitConverter.ToString(hash).Replace("-", string.Empty);
+        }
+
         private static bool file_is_locked(Exception exception)
         {
             var errorCode = 0;

src/chocolatey/infrastructure/cryptography/IHashProvider.cs

@@ -1,4 +1,4 @@
-// Copyright © 2011 - Present RealDimensions Software, LLC
+// Copyright � 2011 - Present RealDimensions Software, LLC
 // 
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -13,6 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+using System.IO;
+
 namespace chocolatey.infrastructure.cryptography
 {
     /// <summary>
@@ -32,5 +34,19 @@ public interface IHashProvider
         /// <param name="filePath">The file path.</param>
         /// <returns>A computed hash of the file, based on the contents.</returns>
         string hash_file(string filePath);
+
+        /// <summary>
+        /// Returns a hash of the specified stream.
+        /// </summary>
+        /// <param name="inputStream">The stream.</param>
+        /// <returns>A computed hash of the stream, based on the contents.</returns>
+        string hash_stream(Stream inputStream);
+
+        /// <summary>
+        /// Returns a hash of the specified byte array.
+        /// </summary>
+        /// <param name="buffer">The byte array.</param>
+        /// <returns>A computed hash of the array, based on the contents.</returns>
+        string hash_byte_array(byte[] buffer);
     }
 }