/// <summary>
/// Computes the hash of a given InputStream. This is a wrapper over the HashAlgorithm crypto functions.
/// </summary>
/// <param name="stream">the source stream. Use a MemoryStream if uncertain.</param>
/// <param name="hashType">the Algorithm to use to compute the hash</param>
/// <returns>a byte[] representation of the hash. If the Stream is a null object
/// then null will be returned. If the Stream is empty an empty byte[] {} will be returned.</returns>
public static byte[] ComputeHash(this Stream stream, ChecksumAlgorithm hashType = ChecksumAlgorithm.SHA256)
{
if (stream == null) return null;
using (var algorithm = HashAlgorithm.Create(hashType.ToString()))
return algorithm.ComputeHash(stream);
}
/// <summary>
/// Computes the hash of a given InputStream. This is a wrapper over the HashAlgorithm crypto functions.
/// </summary>
/// <param name="stream">the source stream. Use a MemoryStream if uncertain.</param>
/// <param name="hashType">the Algorithm to use to compute the hash</param>
/// <returns>a byte[] representation of the hash. If the Stream is a null object
/// then null will be returned. If the Stream is empty an empty byte[] {} will be returned.</returns>
public static byte[] ComputeHash(this Stream stream, ChecksumAlgorithm hashType = ChecksumAlgorithm.SHA256, long? maxBodySize = null)
{
if (stream == null) return null;
using (var algorithm = HashAlgorithm.Create(hashType.ToString()))
if (maxBodySize != null && maxBodySize > 0)
return algorithm.ComputeHash(stream.ReadExactly((long) maxBodySize));
else
return algorithm.ComputeHash(stream);
}
/// <summary>
/// Computes the hash of a given InputStream. This is a wrapper over the HashAlgorithm crypto functions.
/// </summary>
/// <param name="stream">the source stream. Use a MemoryStream if uncertain.</param>
/// <param name="hashType">the Algorithm to use to compute the hash</param>
/// <returns>a byte[] representation of the hash. If the Stream is a null object
/// then null will be returned. If the Stream is empty an empty byte[] {} will be returned.</returns>
public static byte[] ComputeHash(this Stream stream, ChecksumAlgorithm hashType = ChecksumAlgorithm.SHA256)
{
if (stream == null)
{
return(null);
}
using (var algorithm = HashAlgorithm.Create(hashType.ToString()))
return(algorithm.ComputeHash(stream));
}
/// <summary>
/// Computes the hash of a given InputStream. This is a wrapper over the HashAlgorithm crypto functions.
/// </summary>
/// <param name="stream">the source stream. Use a MemoryStream if uncertain.</param>
/// <param name="hashType">the Algorithm to use to compute the hash</param>
/// <returns>a byte[] representation of the hash. If the Stream is a null object
/// then null will be returned. If the Stream is empty an empty byte[] {} will be returned.</returns>
public static byte[] ComputeHash(this Stream stream, ChecksumAlgorithm hashType = ChecksumAlgorithm.SHA256, long?maxBodySize = null)
{
if (stream == null)
{
return(null);
}
using (var algorithm = HashAlgorithm.Create(hashType.ToString()))
if (maxBodySize != null && maxBodySize > 0)
{
return(algorithm.ComputeHash(stream.ReadExactly((long)maxBodySize)));
}
else
{
return(algorithm.ComputeHash(stream));
}
}
