/// <summary>
/// Return the MD5 hash of the provided memory stream as a string. Stream position will be equal to the length of stream on
/// return, this ensures the MD5 is consistent.
/// </summary>
/// <param name="streamToMD5">The bytes which will be checksummed</param>
/// <returns>The MD5 checksum as a string</returns>
public static string MD5(Stream streamToMD5)
{
if (streamToMD5 == null)
{
throw new ArgumentNullException("streamToMD5", "Provided Stream cannot be null.");
}
string resultStr;
#if NETFX_CORE
var alg = Windows.Security.Cryptography.Core.HashAlgorithmProvider.OpenAlgorithm(Windows.Security.Cryptography.Core.HashAlgorithmNames.Md5);
var buffer = (new Windows.Storage.Streams.DataReader(streamToMD5.AsInputStream())).ReadBuffer((uint)streamToMD5.Length);
var hashedData = alg.HashData(buffer);
resultStr = Windows.Security.Cryptography.CryptographicBuffer.EncodeToHexString(hashedData).Replace("-", "");
#else
using (System.Security.Cryptography.HashAlgorithm md5 =
#if WINDOWS_PHONE
new Tools.MD5Managed())
#else
System.Security.Cryptography.MD5.Create())
#endif
{
//If we don't ensure the position is consistent the MD5 changes
streamToMD5.Seek(0, SeekOrigin.Begin);
resultStr = BitConverter.ToString(md5.ComputeHash(streamToMD5)).Replace("-", "");
}
#endif
return(resultStr);
}
/// <summary>
/// Return the MD5 for the specific part of the stream only.
/// </summary>
/// <returns></returns>
public string MD5CheckSum()
{
using (MemoryStream ms = new MemoryStream())
{
ThreadSafeStream.CopyTo(ms, Start, Length, 8000);
#if NETFX_CORE
var alg = Windows.Security.Cryptography.Core.HashAlgorithmProvider.OpenAlgorithm(Windows.Security.Cryptography.Core.HashAlgorithmNames.Md5);
var buffer = (new Windows.Storage.Streams.DataReader(ms.AsInputStream())).ReadBuffer((uint)ms.Length);
var hashedData = alg.HashData(buffer);
return(Windows.Security.Cryptography.CryptographicBuffer.EncodeToHexString(hashedData).Replace("-", ""));
#else
#if WINDOWS_PHONE
using (var md5 = new Tools.MD5Managed())
{
#else
using (var md5 = System.Security.Cryptography.MD5.Create())
{
#endif
return(BitConverter.ToString(md5.ComputeHash(ms)).Replace("-", ""));
}
#endif
}
}
/// <summary>
/// Return the MD5 for the specific part of the stream only.
/// </summary>
/// <returns></returns>
public string MD5CheckSum()
{
using (MemoryStream ms = new MemoryStream())
{
ThreadSafeStream.CopyTo(ms, Start, Length, 8000);
#if NETFX_CORE
var alg = Windows.Security.Cryptography.Core.HashAlgorithmProvider.OpenAlgorithm(Windows.Security.Cryptography.Core.HashAlgorithmNames.Md5);
var buffer = (new Windows.Storage.Streams.DataReader(ms.AsInputStream())).ReadBuffer((uint)ms.Length);
var hashedData = alg.HashData(buffer);
return Windows.Security.Cryptography.CryptographicBuffer.EncodeToHexString(hashedData).Replace("-", "");
#else
#if WINDOWS_PHONE
using(var md5 = new Tools.MD5Managed())
{
#else
using (var md5 = System.Security.Cryptography.MD5.Create())
{
#endif
return BitConverter.ToString(md5.ComputeHash(ms)).Replace("-", "");
}
#endif
}
}
/// <summary>
/// Return the MD5 hash of the provided memory stream as a string. Stream position will be equal to the length of stream on
/// return, this ensures the MD5 is consistent.
/// </summary>
/// <param name="streamToMD5">The bytes which will be checksummed</param>
/// <returns>The MD5 checksum as a string</returns>
public static string MD5(Stream streamToMD5)
{
if (streamToMD5 == null) throw new ArgumentNullException("streamToMD5", "Provided Stream cannot be null.");
string resultStr;
#if NETFX_CORE
var alg = Windows.Security.Cryptography.Core.HashAlgorithmProvider.OpenAlgorithm(Windows.Security.Cryptography.Core.HashAlgorithmNames.Md5);
var buffer = (new Windows.Storage.Streams.DataReader(streamToMD5.AsInputStream())).ReadBuffer((uint)streamToMD5.Length);
var hashedData = alg.HashData(buffer);
resultStr = Windows.Security.Cryptography.CryptographicBuffer.EncodeToHexString(hashedData).Replace("-", "");
#else
using (System.Security.Cryptography.HashAlgorithm md5 =
#if WINDOWS_PHONE
new Tools.MD5Managed())
#else
System.Security.Cryptography.MD5.Create())
#endif
{
//If we don't ensure the position is consistent the MD5 changes
streamToMD5.Seek(0, SeekOrigin.Begin);
resultStr = BitConverter.ToString(md5.ComputeHash(streamToMD5)).Replace("-", "");
}
#endif
return resultStr;
}
