Merge pull request #154 from amarendrabiorad/master

Fixed append operation for archives with encrypted headers.

SevenZip/SevenZipCompressor.cs

@@ -1202,6 +1202,8 @@ public void CompressFilesEncrypted(string archiveName, int commonRootLength, str
  return;
  }
  }
+
+ UpdateCompressorPassword(password);
 
  if (_volumeSize == 0 || !_compressingFilesOnDisk)
  {
@@ -1499,7 +1501,9 @@ public void CompressStreamDictionary(IDictionary<string, Stream> streamDictionar
  {
  ValidateStream(archiveStream);
  }
-
+
+ UpdateCompressorPassword(password);
+
  if (streamDictionary.Where(
  pair => pair.Value != null && (!pair.Value.CanSeek || !pair.Value.CanRead)).Any(
  pair => !ThrowException(null,
@@ -1664,11 +1668,7 @@ public void ModifyArchive(string archiveName, IDictionary<int, string> newFileNa
  }
  }
 
- if (!string.IsNullOrEmpty(password) && string.IsNullOrEmpty(Password))
- {
- // When modifying an encrypted archive, Password is not set in the SevenZipCompressor.
- Password = password;
- }
+ UpdateCompressorPassword(password);
 
  try
  {
@@ -1862,5 +1862,18 @@ private static string[] GetFullFilePaths(IEnumerable<string> fileFullNames)
  {
  return fileFullNames.Select(Path.GetFullPath).ToArray();
  }
+
+ /// <summary>
+ /// Check and update password in SevenZipCompressor
+ /// </summary>
+ /// <param name="password">The password to use.</param>
+ private void UpdateCompressorPassword(string password)
+ {
+ if (!string.IsNullOrEmpty(password) && string.IsNullOrEmpty(Password))
+ {
+ // When modifying an encrypted archive, Password is not set in the SevenZipCompressor.
+ Password = password;
+ }
+ }
  }
 }