RIPEMD160 RIPEMD160 RIPEMD160 RIPEMD160 Class

Definição

Representa a classe base abstrata da qual todas as implementações de algoritmo de hash MD160 são herdadas.Represents the abstract class from which all implementations of the MD160 hash algorithm inherit.

public ref class RIPEMD160 abstract : System::Security::Cryptography::HashAlgorithm
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class RIPEMD160 : System.Security.Cryptography.HashAlgorithm
type RIPEMD160 = class
    inherit HashAlgorithm
Public MustInherit Class RIPEMD160
Inherits HashAlgorithm
Herança
Derivado
Atributos

Exemplos

O exemplo de código a seguir calcula o RIPEMD160 hash para todos os arquivos em um diretório.The following code example calculates the RIPEMD160 hash for all files in a directory.

using namespace System;
using namespace System::IO;
using namespace System::Security::Cryptography;

// Print the byte array in a readable format.
void PrintByteArray( array<Byte>^array )
{
   int i;
   for ( i = 0; i < array->Length; i++ )
   {
      Console::Write( String::Format( "{0:X2}", array[ i ] ) );
      if ( (i % 4) == 3 )
            Console::Write( " " );

   }
   Console::WriteLine();
}

int main()
{
   array<String^>^args = Environment::GetCommandLineArgs();
   if ( args->Length < 2 )
   {
      Console::WriteLine( "Usage: hashdir <directory>" );
      return 0;
   }

   try
   {
      
      // Create a DirectoryInfo object representing the specified directory.
      DirectoryInfo^ dir = gcnew DirectoryInfo( args[ 1 ] );
      
      // Get the FileInfo objects for every file in the directory.
      array<FileInfo^>^files = dir->GetFiles();
      
      // Initialize a RIPE160 hash object.
      RIPEMD160 ^ myRIPEMD160 = RIPEMD160Managed::Create();
      array<Byte>^hashValue;
      
      // Compute and print the hash values for each file in directory.
      System::Collections::IEnumerator^ myEnum = files->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         FileInfo^ fInfo = safe_cast<FileInfo^>(myEnum->Current);
         
         // Create a fileStream for the file.
         FileStream^ fileStream = fInfo->Open( FileMode::Open );
         
         // Compute the hash of the fileStream.
         hashValue = myRIPEMD160->ComputeHash( fileStream );
         
         // Write the name of the file to the Console.
         Console::Write( "{0}: ", fInfo->Name );
         
         // Write the hash value to the Console.
         PrintByteArray( hashValue );
         
         // Close the file.
         fileStream->Close();
      }
      return 0;
   }
   catch ( DirectoryNotFoundException^ ) 
   {
      Console::WriteLine( "Error: The directory specified could not be found." );
   }
   catch ( IOException^ ) 
   {
      Console::WriteLine( "Error: A file in the directory could not be accessed." );
   }

}

using System;
using System.IO;
using System.Security.Cryptography;
using System.Windows.Forms;

public class HashDirectory
{

    [STAThreadAttribute]
    public static void Main(String[] args)
    {
        string directory = "";
        if (args.Length < 1)
        {
            FolderBrowserDialog fbd = new FolderBrowserDialog();
            DialogResult dr = fbd.ShowDialog();
            if (dr == DialogResult.OK)
                directory = fbd.SelectedPath;
            else
            {
                Console.WriteLine("No directory selected.");
                return;
            }
        }
        else
            directory = args[0];
        try
        {
            // Create a DirectoryInfo object representing the specified directory.
            DirectoryInfo dir = new DirectoryInfo(directory);
            // Get the FileInfo objects for every file in the directory.
            FileInfo[] files = dir.GetFiles();
            // Initialize a RIPE160 hash object.
            RIPEMD160 myRIPEMD160 = RIPEMD160Managed.Create();
            byte[] hashValue;
            // Compute and print the hash values for each file in directory.
            foreach (FileInfo fInfo in files)
            {
                // Create a fileStream for the file.
                FileStream 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();
            }
            return;
        }
        catch (DirectoryNotFoundException)
        {
            Console.WriteLine("Error: The directory specified could not be found.");
        }
        catch (IOException)
        {
            Console.WriteLine("Error: A file in the directory could not be accessed.");
        }
    }
    // Print the byte array in a readable format.
    public static void PrintByteArray(byte[] array)
    {
        int i;
        for (i = 0; i < array.Length; i++)
        {
            Console.Write(String.Format("{0:X2}", array[i]));
            if ((i % 4) == 3) Console.Write(" ");
        }
        Console.WriteLine();
    }
}
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

Comentários

Hash funções mapa cadeias de caracteres binárias de um comprimento arbitrário para pequenas cadeias de caracteres binárias de comprimento fixo.Hash functions map binary strings of an arbitrary length to small binary strings of a fixed length. Uma função de hash criptográfico tem a propriedade que é impraticável para encontrar duas entradas distintas esse hash com o mesmo valor; Isto é, hashes de dois conjuntos de dados devem corresponder ao se os dados correspondentes também correspondem.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. Pequenas alterações aos dados resultar em grandes mudanças repentinas no hash.Small changes to the data result in large unpredictable changes in the hash.

RIPEMD-160 é uma função de hash criptográfico de 160 bits.RIPEMD-160 is a 160-bit cryptographic hash function. Ele destina-se para uso como um substituto para as funções de hash de 128 bits, MD4, MD5 e RIPEMD.It is intended for use as a replacement for the 128-bit hash functions MD4, MD5, and RIPEMD. RIPEMD foi desenvolvido na estrutura do projeto da UE RIPE (integridade primitivos de avaliação de corrida, 1992 1988).RIPEMD was developed in the framework of the EU project RIPE (RACE Integrity Primitives Evaluation, 1988-1992).

Observação

RIPEMD160 foi substituído pelo Secure Hash algoritmos SHA-256 e SHA-512 e suas classes derivadas.RIPEMD160 has been superseded by the Secure Hash Algorithms SHA-256 and SHA-512 and their derived classes. SHA256 e SHA512 oferecem mais segurança e desempenho que RIPEMD160.SHA256 and SHA512 offer better security and performance than RIPEMD160. Use RIPEMD160 somente para compatibilidade com aplicativos herdados e dados.Use RIPEMD160 only for compatibility with legacy applications and data.

Construtores

RIPEMD160() RIPEMD160() RIPEMD160() RIPEMD160()

Inicializa uma nova instância da classe RIPEMD160.Initializes a new instance of the RIPEMD160 class.

Métodos

Clear() Clear() Clear() Clear()

Libera todos os recursos usados pela classe HashAlgorithm.Releases all resources used by the HashAlgorithm class.

(Inherited from HashAlgorithm)
ComputeHash(Byte[]) ComputeHash(Byte[]) ComputeHash(Byte[]) ComputeHash(Byte[])

Calcula o valor do hash da matriz de bytes especificada.Computes the hash value for the specified byte array.

(Inherited from HashAlgorithm)
ComputeHash(Byte[], Int32, Int32) ComputeHash(Byte[], Int32, Int32) ComputeHash(Byte[], Int32, Int32) ComputeHash(Byte[], Int32, Int32)

Calcula o valor de hash para a região especificada da matriz de bytes especificada.Computes the hash value for the specified region of the specified byte array.

(Inherited from HashAlgorithm)
ComputeHash(Stream) ComputeHash(Stream) ComputeHash(Stream) ComputeHash(Stream)

Calcula o valor do hash do objeto Stream especificado.Computes the hash value for the specified Stream object.

(Inherited from HashAlgorithm)
Create() Create() Create() Create()

Cria uma instância da implementação padrão do algoritmo de hash RIPEMD160.Creates an instance of the default implementation of the RIPEMD160 hash algorithm.

Create(String) Create(String) Create(String) Create(String)

Cria uma instância da implementação especificada do algoritmo de hash RIPEMD160.Creates an instance of the specified implementation of the RIPEMD160 hash algorithm.

Dispose() Dispose() Dispose() Dispose()

Libera todos os recursos usados pela instância atual da classe HashAlgorithm.Releases all resources used by the current instance of the HashAlgorithm class.

(Inherited from HashAlgorithm)
Dispose(Boolean) Dispose(Boolean) Dispose(Boolean) Dispose(Boolean)

Libera os recursos não gerenciados usados pelo HashAlgorithm e opcionalmente libera os recursos gerenciados.Releases the unmanaged resources used by the HashAlgorithm and optionally releases the managed resources.

(Inherited from HashAlgorithm)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina se o objeto especificado é igual ao objeto atual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serve como a função de hash padrão.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtém o Type da instância atual.Gets the Type of the current instance.

(Inherited from Object)
HashCore(Byte[], Int32, Int32) HashCore(Byte[], Int32, Int32) HashCore(Byte[], Int32, Int32) HashCore(Byte[], Int32, Int32)

Quando substituído em uma classe derivada, roteia os dados gravados no objeto para o algoritmo de hash para computar o hash.When overridden in a derived class, routes data written to the object into the hash algorithm for computing the hash.

(Inherited from HashAlgorithm)
HashCore(ReadOnlySpan<Byte>) HashCore(ReadOnlySpan<Byte>) HashCore(ReadOnlySpan<Byte>) HashCore(ReadOnlySpan<Byte>) Inherited from HashAlgorithm
HashFinal() HashFinal() HashFinal() HashFinal()

Quando substituído em uma classe derivada, finaliza o cálculo de hash depois que os últimos dados são processados pelo objeto de fluxo criptográfico.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() Initialize() Initialize() Initialize()

Inicializa uma implementação da classe HashAlgorithm.Initializes an implementation of the HashAlgorithm class.

(Inherited from HashAlgorithm)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Cria uma cópia superficial do Object atual.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString() ToString() ToString() ToString()

Retorna uma cadeia de caracteres que representa o objeto atual.Returns a string that represents the current object.

(Inherited from Object)
TransformBlock(Byte[], Int32, Int32, Byte[], Int32) TransformBlock(Byte[], Int32, Int32, Byte[], Int32) TransformBlock(Byte[], Int32, Int32, Byte[], Int32) TransformBlock(Byte[], Int32, Int32, Byte[], Int32)

Calcula o valor de hash para a região especificada da matriz de bytes de entrada e copia a região especificada da matriz de bytes de entrada para a região especificada da matriz de bytes de saída.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) TransformFinalBlock(Byte[], Int32, Int32) TransformFinalBlock(Byte[], Int32, Int32) TransformFinalBlock(Byte[], Int32, Int32)

Calcula o valor de hash para a região especificada da matriz de bytes especificada.Computes the hash value for the specified region of the specified byte array.

(Inherited from HashAlgorithm)
TryComputeHash(ReadOnlySpan<Byte>, Span<Byte>, Int32) TryComputeHash(ReadOnlySpan<Byte>, Span<Byte>, Int32) TryComputeHash(ReadOnlySpan<Byte>, Span<Byte>, Int32) TryComputeHash(ReadOnlySpan<Byte>, Span<Byte>, Int32) Inherited from HashAlgorithm
TryHashFinal(Span<Byte>, Int32) TryHashFinal(Span<Byte>, Int32) TryHashFinal(Span<Byte>, Int32) TryHashFinal(Span<Byte>, Int32) Inherited from HashAlgorithm

Propriedades

CanReuseTransform CanReuseTransform CanReuseTransform CanReuseTransform

Obtém um valor que indica se a transformação atual pode ser reutilizada.Gets a value indicating whether the current transform can be reused.

(Inherited from HashAlgorithm)
CanTransformMultipleBlocks CanTransformMultipleBlocks CanTransformMultipleBlocks CanTransformMultipleBlocks

Quando substituído em uma classe derivada, obtém um valor que indica se vários blocos podem ser transformados.When overridden in a derived class, gets a value indicating whether multiple blocks can be transformed.

(Inherited from HashAlgorithm)
Hash Hash Hash Hash

Obtém o valor do código hash computado.Gets the value of the computed hash code.

(Inherited from HashAlgorithm)
HashSize HashSize HashSize HashSize

Obtém o tamanho, em bits, do código hash computado.Gets the size, in bits, of the computed hash code.

(Inherited from HashAlgorithm)
InputBlockSize InputBlockSize InputBlockSize InputBlockSize

Quando substituído em uma classe derivada, obtém o tamanho do bloco de entrada.When overridden in a derived class, gets the input block size.

(Inherited from HashAlgorithm)
OutputBlockSize OutputBlockSize OutputBlockSize OutputBlockSize

Quando substituído em uma classe derivada, obtém o tamanho do bloco de saída.When overridden in a derived class, gets the output block size.

(Inherited from HashAlgorithm)

Campos

HashSizeValue HashSizeValue HashSizeValue HashSizeValue

Representa o tamanho, em bits, do código hash calculado.Represents the size, in bits, of the computed hash code.

(Inherited from HashAlgorithm)
HashValue HashValue HashValue HashValue

Representa o valor do código hash computado.Represents the value of the computed hash code.

(Inherited from HashAlgorithm)
State State State State

Representa o estado do cálculo de hash.Represents the state of the hash computation.

(Inherited from HashAlgorithm)

Implantações explícitas de interface

IDisposable.Dispose() IDisposable.Dispose() IDisposable.Dispose() IDisposable.Dispose()

Libera os recursos não gerenciados usados pelo HashAlgorithm e opcionalmente libera os recursos gerenciados.Releases the unmanaged resources used by the HashAlgorithm and optionally releases the managed resources.

(Inherited from HashAlgorithm)

Aplica-se a

Veja também