/// <summary>
/// Takes the path to a file and returns a 128-bit hash of that file.
/// </summary>
/// <param name="filePath">Path to file that is to be hashed.</param>
/// <param name="options">The value in this column must be 0. This parameter is reserved for future use.</param>
/// <param name="hash">Int array that receives the returned file hash information.</param>
public static void GetFileHash(string filePath, int options, out int[] hash)
{
MsiInterop.MSIFILEHASHINFO hashInterop = new MsiInterop.MSIFILEHASHINFO();
hashInterop.fileHashInfoSize = 20;
uint er = MsiInterop.MsiGetFileHash(filePath, 0, ref hashInterop);
if (110 == er)
{
throw new System.IO.FileNotFoundException("Failed to find file for hashing.", filePath);
}
else if (0 != er)
{
throw new ApplicationException(String.Format("Unknown error while getting hash of file: {0}, system error: {1}", filePath, er)); // TODO: come up with a real exception to throw
}
hash = new int[4];
hash[0] = hashInterop.data0;
hash[1] = hashInterop.data1;
hash[2] = hashInterop.data2;
hash[3] = hashInterop.data3;
}
/// <summary>
/// Adds a file to the cabinet.
/// </summary>
/// <param name="fileRow">The filerow of the file to add.</param>
public void AddFile(FileRow fileRow)
{
MsiInterop.MSIFILEHASHINFO hashInterop = new MsiInterop.MSIFILEHASHINFO();
if (null != fileRow.HashRow)
{
hashInterop.FileHashInfoSize = 20;
hashInterop.Data0 = (int)fileRow.HashRow[2];
hashInterop.Data1 = (int)fileRow.HashRow[3];
hashInterop.Data2 = (int)fileRow.HashRow[4];
hashInterop.Data3 = (int)fileRow.HashRow[5];
this.AddFile(fileRow.Source, fileRow.File, hashInterop);
}
else
{
this.AddFile(fileRow.Source, fileRow.File);
}
}
/// <summary>
/// Takes the path to a file and returns a 128-bit hash of that file.
/// </summary>
/// <param name="filePath">Path to file that is to be hashed.</param>
/// <param name="options">The value in this column must be 0. This parameter is reserved for future use.</param>
/// <param name="hash">Int array that receives the returned file hash information.</param>
internal static void GetFileHash(string filePath, int options, out int[] hash)
{
MsiInterop.MSIFILEHASHINFO hashInterop = new MsiInterop.MSIFILEHASHINFO();
hashInterop.FileHashInfoSize = 20;
int error = MsiInterop.MsiGetFileHash(filePath, Convert.ToUInt32(options), hashInterop);
if (0 != error)
{
throw new MsiException(error);
}
Debug.Assert(20 == hashInterop.FileHashInfoSize);
hash = new int[4];
hash[0] = hashInterop.Data0;
hash[1] = hashInterop.Data1;
hash[2] = hashInterop.Data2;
hash[3] = hashInterop.Data3;
}
