SHA1CryptoServiceProvider 类

定义

使用加密服务提供程序 (CSP) 提供的实现,计算输入数据的 SHA1 哈希值。Computes the SHA1 hash value for the input data using the implementation provided by the cryptographic service provider (CSP). 此类不能被继承。This class cannot be inherited.

public ref class SHA1CryptoServiceProvider sealed : System::Security::Cryptography::SHA1
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class SHA1CryptoServiceProvider : System.Security.Cryptography.SHA1
type SHA1CryptoServiceProvider = class
    inherit SHA1
Public NotInheritable Class SHA1CryptoServiceProvider
Inherits SHA1
继承
SHA1CryptoServiceProvider
属性

示例

下面的代码示例计算SHA1的哈希data值,并将其result存储在中。The following code example computes the SHA1 hash value for data and stores it in result. 此示例假设有一个预定义的常量DATA_SIZEThis example assumes that there is a predefined constant DATA_SIZE.

array<Byte>^ data = gcnew array<Byte>( DATA_SIZE );

array<Byte>^ result;

SHA1^ sha = gcnew SHA1CryptoServiceProvider;

// This is one implementation of the abstract class SHA1.
result = sha->ComputeHash( data );
byte[] data = new byte[DATA_SIZE];

byte[] result; 
 
SHA1 sha = new SHA1CryptoServiceProvider(); 
// This is one implementation of the abstract class SHA1.

result = sha.ComputeHash(data);
Dim data(DATA_SIZE) As Byte
       
Dim result() As Byte
       
Dim sha As New SHA1CryptoServiceProvider()
' This is one implementation of the abstract class SHA1.
result = sha.ComputeHash(data)

注解

SHA1CryptoServiceProvider类的哈希大小为160位。The hash size for the SHA1CryptoServiceProvider class is 160 bits.

重要

此类型实现 IDisposable 接口。This type implements the IDisposable interface. 在使用完类型后,您应直接或间接释放类型。When you have finished using the type, you should dispose of it either directly or indirectly. 若要直接释放类型,请在 try/catch 块中调用其 Dispose 方法。To dispose of the type directly, call its Dispose method in a try/catch block. 若要间接释放类型,请使用 using(在 C# 中)或 Using(在 Visual Basic 中)等语言构造。To dispose of it indirectly, use a language construct such as using (in C#) or Using (in Visual Basic). 有关详细信息,请参阅 IDisposable 接口主题中的“使用实现 IDisposable 的对象”一节。For more information, see the "Using an Object that Implements IDisposable" section in the IDisposable interface topic.

由于 SHA1 出现冲突问题,Microsoft 建议使用基于 SHA256 或更好的安全模型。Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better.

构造函数

SHA1CryptoServiceProvider()

初始化 SHA1CryptoServiceProvider 类的新实例。Initializes a new instance of the SHA1CryptoServiceProvider class.

字段

HashSizeValue

表示计算所得的哈希代码的大小(以位为单位)。Represents the size, in bits, of the computed hash code.

(继承自 HashAlgorithm)
HashValue

表示计算所得的哈希代码的值。Represents the value of the computed hash code.

(继承自 HashAlgorithm)
State

表示哈希计算的状态。Represents the state of the hash computation.

(继承自 HashAlgorithm)

属性

CanReuseTransform

获取一个值,该值指示是否可重复使用当前转换。Gets a value indicating whether the current transform can be reused.

(继承自 HashAlgorithm)
CanTransformMultipleBlocks

当在派生类中重写时,获取一个值,该值指示是否可以转换多个块。When overridden in a derived class, gets a value indicating whether multiple blocks can be transformed.

(继承自 HashAlgorithm)
Hash

获取计算所得的哈希代码的值。Gets the value of the computed hash code.

(继承自 HashAlgorithm)
HashSize

获取计算所得的哈希代码的大小(以位为单位)。Gets the size, in bits, of the computed hash code.

(继承自 HashAlgorithm)
InputBlockSize

当在派生类中重写时,获取输入块的大小。When overridden in a derived class, gets the input block size.

(继承自 HashAlgorithm)
OutputBlockSize

当在派生类中重写时,获取输出块的大小。When overridden in a derived class, gets the output block size.

(继承自 HashAlgorithm)

方法

Clear()

释放 HashAlgorithm 类使用的所有资源。Releases all resources used by the HashAlgorithm class.

(继承自 HashAlgorithm)
ComputeHash(Byte[])

计算指定字节数组的哈希值。Computes the hash value for the specified byte array.

(继承自 HashAlgorithm)
ComputeHash(Byte[], Int32, Int32)

计算指定字节数组的指定区域的哈希值。Computes the hash value for the specified region of the specified byte array.

(继承自 HashAlgorithm)
ComputeHash(Stream)

计算指定 Stream 对象的哈希值。Computes the hash value for the specified Stream object.

(继承自 HashAlgorithm)
Dispose()

释放 HashAlgorithm 类的当前实例所使用的所有资源。Releases all resources used by the current instance of the HashAlgorithm class.

(继承自 HashAlgorithm)
Dispose(Boolean)

释放由 HashAlgorithm 占用的非托管资源,还可以另外再释放托管资源。Releases the unmanaged resources used by the HashAlgorithm and optionally releases the managed resources.

(继承自 HashAlgorithm)
Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(继承自 Object)
Finalize()

在垃圾回收将某一对象回收前允许该对象尝试释放资源并执行其他清理操作。Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.

GetHashCode()

用作默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
HashCore(Byte[], Int32, Int32)

当在派生类中重写时,将写入对象的数据路由到哈希算法以计算哈希值。When overridden in a derived class, routes data written to the object into the hash algorithm for computing the hash.

(继承自 HashAlgorithm)
HashCore(ReadOnlySpan<Byte>) (继承自 HashAlgorithm)
HashFinal()

当在派生类中重写时,在加密流对象处理完最后的数据后完成哈希计算。When overridden in a derived class, finalizes the hash computation after the last data is processed by the cryptographic stream object.

(继承自 HashAlgorithm)
Initialize()

初始化 SHA1CryptoServiceProvider 的实例。Initializes an instance of SHA1CryptoServiceProvider.

MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)
TransformBlock(Byte[], Int32, Int32, Byte[], Int32)

计算输入字节数组指定区域的哈希值,并将输入字节数组指定区域复制到输出字节数组的指定区域。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.

(继承自 HashAlgorithm)
TransformFinalBlock(Byte[], Int32, Int32)

计算指定字节数组的指定区域的哈希值。Computes the hash value for the specified region of the specified byte array.

(继承自 HashAlgorithm)
TryComputeHash(ReadOnlySpan<Byte>, Span<Byte>, Int32) (继承自 HashAlgorithm)
TryHashFinal(Span<Byte>, Int32) (继承自 HashAlgorithm)

显式界面实现

IDisposable.Dispose()

释放由 HashAlgorithm 占用的非托管资源,还可以另外再释放托管资源。Releases the unmanaged resources used by the HashAlgorithm and optionally releases the managed resources.

(继承自 HashAlgorithm)

适用于

另请参阅