RIPEMD160 Class
Represents the abstract class from which all implementations of the MD160 hash algorithm inherit.
Assembly: mscorlib (in mscorlib.dll)
System.Security.Cryptography.HashAlgorithm
System.Security.Cryptography.RIPEMD160
System.Security.Cryptography.RIPEMD160Managed
| Name | Description | |
|---|---|---|
![]() | RIPEMD160() | Initializes a new instance of the RIPEMD160 class. |
| Name | Description | |
|---|---|---|
![]() | CanReuseTransform | Gets a value indicating whether the current transform can be reused.(Inherited from HashAlgorithm.) |
![]() | CanTransformMultipleBlocks | When overridden in a derived class, gets a value indicating whether multiple blocks can be transformed.(Inherited from HashAlgorithm.) |
![]() | Hash | Gets the value of the computed hash code.(Inherited from HashAlgorithm.) |
![]() | HashSize | Gets the size, in bits, of the computed hash code.(Inherited from HashAlgorithm.) |
![]() | InputBlockSize | When overridden in a derived class, gets the input block size.(Inherited from HashAlgorithm.) |
![]() | OutputBlockSize | When overridden in a derived class, gets the output block size.(Inherited from HashAlgorithm.) |
| Name | Description | |
|---|---|---|
![]() | Clear() | Releases all resources used by the HashAlgorithm class.(Inherited from HashAlgorithm.) |
![]() | ComputeHash(Byte()) | Computes the hash value for the specified byte array.(Inherited from HashAlgorithm.) |
![]() | ComputeHash(Byte(), Int32, Int32) | Computes the hash value for the specified region of the specified byte array.(Inherited from HashAlgorithm.) |
![]() | ComputeHash(Stream) | Computes the hash value for the specified Stream object.(Inherited from HashAlgorithm.) |
![]() ![]() | Create() | Creates an instance of the default implementation of the RIPEMD160 hash algorithm. |
![]() ![]() | Create(String) | Creates an instance of the specified implementation of the RIPEMD160 hash algorithm. |
![]() | Dispose() | Releases all resources used by the current instance of the HashAlgorithm class.(Inherited from HashAlgorithm.) |
![]() | Dispose(Boolean) | Releases the unmanaged resources used by the HashAlgorithm and optionally releases the managed resources.(Inherited from HashAlgorithm.) |
![]() | Equals(Object) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetType() | |
![]() | HashCore(Byte(), Int32, Int32) | When overridden in a derived class, routes data written to the object into the hash algorithm for computing the hash.(Inherited from HashAlgorithm.) |
![]() | HashFinal() | When overridden in a derived class, finalizes the hash computation after the last data is processed by the cryptographic stream object.(Inherited from HashAlgorithm.) |
![]() | Initialize() | Initializes an implementation of the HashAlgorithm class.(Inherited from HashAlgorithm.) |
![]() | MemberwiseClone() | |
![]() | ToString() | Returns a string that represents the current object.(Inherited from Object.) |
![]() | TransformBlock(Byte(), Int32, Int32, Byte(), Int32) | Computes the hash value for the specified region of the input byte array and copies the specified region of the input byte array to the specified region of the output byte array.(Inherited from HashAlgorithm.) |
![]() | TransformFinalBlock(Byte(), Int32, Int32) | Computes the hash value for the specified region of the specified byte array.(Inherited from HashAlgorithm.) |
| Name | Description | |
|---|---|---|
![]() | HashSizeValue | Represents the size, in bits, of the computed hash code.(Inherited from HashAlgorithm.) |
![]() | HashValue | Represents the value of the computed hash code.(Inherited from HashAlgorithm.) |
![]() | State | Represents the state of the hash computation.(Inherited from HashAlgorithm.) |
Hash functions map binary strings of an arbitrary length to small binary strings of a fixed length. A cryptographic hash function has the property that it is computationally infeasible to find two distinct inputs that hash to the same value; that is, hashes of two sets of data should match if the corresponding data also matches. Small changes to the data result in large unpredictable changes in the hash.
RIPEMD-160 is a 160-bit cryptographic hash function. It is intended for use as a replacement for the 128-bit hash functions MD4, MD5, and RIPEMD. RIPEMD was developed in the framework of the EU project RIPE (RACE Integrity Primitives Evaluation, 1988-1992).
The following code example calculates the RIPEMD160 hash for all files in a directory.
Imports System Imports System.IO Imports System.Security.Cryptography Imports System.Windows.Forms Public Class HashDirectory Public Shared Sub Main(ByVal args() As String) Dim directory As String If args.Length < 1 Then Dim fdb As New FolderBrowserDialog Dim dr As DialogResult = fdb.ShowDialog() If (dr = DialogResult.OK) Then directory = fdb.SelectedPath Else Console.WriteLine("No directory selected") Return End If Else directory = args(0) End If Try ' Create a DirectoryInfo object representing the specified directory. Dim dir As New DirectoryInfo(directory) ' Get the FileInfo objects for every file in the directory. Dim files As FileInfo() = dir.GetFiles() ' Initialize a RIPE160 hash object. Dim myRIPEMD160 As RIPEMD160 = RIPEMD160Managed.Create() Dim hashValue() As Byte ' Compute and print the hash values for each file in directory. Dim fInfo As FileInfo For Each fInfo In files ' Create a fileStream for the file. Dim fileStream As FileStream = fInfo.Open(FileMode.Open) ' Be sure it's positioned to the beginning of the stream. fileStream.Position = 0 ' Compute the hash of the fileStream. hashValue = myRIPEMD160.ComputeHash(fileStream) ' Write the name of the file to the Console. Console.Write(fInfo.Name + ": ") ' Write the hash value to the Console. PrintByteArray(hashValue) ' Close the file. fileStream.Close() Next fInfo Return Catch DExc As DirectoryNotFoundException Console.WriteLine("Error: The directory specified could not be found.") Catch IOExc As IOException Console.WriteLine("Error: A file in the directory could not be accessed.") End Try End Sub ' Print the byte array in a readable format. Public Shared Sub PrintByteArray(ByVal array() As Byte) Dim i As Integer For i = 0 To array.Length - 1 Console.Write(String.Format("{0:X2}", array(i))) If i Mod 4 = 3 Then Console.Write(" ") End If Next i Console.WriteLine() End Sub 'PrintByteArray End Class
Available since 2.0
Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.





