SHA1 类

定义

计算输入数据的 SHA1 哈希值。Computes the SHA1 hash for the input data.

public ref class SHA1 abstract : System::Security::Cryptography::HashAlgorithm
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class SHA1 : System.Security.Cryptography.HashAlgorithm
type SHA1 = class
    inherit HashAlgorithm
Public MustInherit Class SHA1
Inherits HashAlgorithm
继承
派生
属性

示例

下面的示例计算 dataSHA1 哈希,并将其存储在 result中。The following example computes the SHA1 hash 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

哈希值用作表示大量数据的固定大小的唯一值。The hash is used as a unique value of fixed size representing a large amount of data. 如果相应的数据也匹配,则两个数据集的哈希应该匹配。Hashes of two sets of data should match if the corresponding data also matches. 数据的小更改会导致哈希中的大量无法预测的更改。Small changes to the data result in large, unpredictable changes in the hash.

SHA1 算法的哈希大小为160位。The hash size for the SHA1 algorithm is 160 bits.

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

SHA1()

初始化 SHA1 的新实例。Initializes a new instance of SHA1.

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)
Create()

创建 SHA1 的默认实现的实例。Creates an instance of the default implementation of SHA1.

Create(String)

创建 SHA1 的指定实现的实例。Creates an instance of the specified implementation of SHA1.

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 HashAlgorithm 使用的非托管资源,并选择性地释放托管资源。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)
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>)

将写入对象的数据路由到哈希算法以计算哈希值。Routes data written to the object into the hash algorithm for computing the hash.

(继承自 HashAlgorithm)
HashFinal()

在派生类中重写时,在加密哈希算法处理最后一个数据后结束哈希计算。When overridden in a derived class, finalizes the hash computation after the last data is processed by the cryptographic hash algorithm.

(继承自 HashAlgorithm)
Initialize()

将哈希算法重置为其初始状态。Resets the hash algorithm to its initial state.

(继承自 HashAlgorithm)
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)

尝试计算指定字节数组的哈希值。Attempts to compute the hash value for the specified byte array.

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

在哈希算法处理最后一个数据后,尝试结束哈希计算。Attempts to finalize the hash computation after the last data is processed by the hash algorithm.

(继承自 HashAlgorithm)

显式接口实现

IDisposable.Dispose()

释放 HashAlgorithm 使用的非托管资源,并选择性地释放托管资源。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