MD5 类
定义
public ref class MD5 abstract : System::Security::Cryptography::HashAlgorithm
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public abstract class MD5 : System.Security.Cryptography.HashAlgorithm
public abstract class MD5 : System.Security.Cryptography.HashAlgorithm
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class MD5 : System.Security.Cryptography.HashAlgorithm
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type MD5 = class
inherit HashAlgorithm
type MD5 = class
inherit HashAlgorithm
[<System.Runtime.InteropServices.ComVisible(true)>]
type MD5 = class
inherit HashAlgorithm
Public MustInherit Class MD5
Inherits HashAlgorithm
- 继承
- 派生
- 属性
注解
哈希函数将任意长度的二进制字符串映射为固定长度的小型二进制字符串。Hash functions map binary strings of an arbitrary length to small binary strings of a fixed length. 加密哈希函数具有属性,该属性无法进行计算,从而无法找到哈希处理为同一值的两个不同的输入;也就是说,如果相应的数据也匹配,则两个数据集的哈希应该匹配。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. 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.
算法的哈希大小 MD5 为128位。The hash size for the MD5 algorithm is 128 bits.
ComputeHash类的方法将 MD5 哈希值作为16字节的数组返回。The ComputeHash methods of the MD5 class return the hash as an array of 16 bytes. 请注意,某些 MD5 实现产生了32字符的十六进制格式的哈希。Note that some MD5 implementations produce a 32-character, hexadecimal-formatted hash. 若要与此类实现进行互操作,请将方法的返回值格式化 ComputeHash 为十六进制值。To interoperate with such implementations, format the return value of the ComputeHash methods as a hexadecimal value.
备注
由于 MD5/SHA1 出现冲突,Microsoft 建议 SHA256 或 SHA512。Due to collision problems with MD5/SHA1, Microsoft recommends SHA256 or SHA512. 请考虑使用类 SHA256 或 SHA512 类而不是 MD5 类。Consider using the SHA256 class or the SHA512 class instead of the MD5 class. MD5仅用于与旧版应用程序和数据兼容。Use MD5 only for compatibility with legacy applications and data.
构造函数
| MD5() |
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) |
| ComputeHashAsync(Stream, CancellationToken) |
异步计算指定 Stream 对象的哈希值。Asynchronously computes the hash value for the specified Stream object. (继承自 HashAlgorithm) |
| Create() |
创建 MD5 哈希算法的默认实现的实例。Creates an instance of the default implementation of the MD5 hash algorithm. |
| Create(String) |
创建 MD5 哈希算法的指定实现的实例。Creates an instance of the specified implementation of the MD5 hash algorithm. |
| 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() |
作为默认哈希函数。Serves as the default hash function. (继承自 Object) |
| GetType() |
获取当前实例的 Type。Gets 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) |
| HashData(Byte[]) |
使用 MD5 算法计算数据的哈希值。Computes the hash of data using the MD5 algorithm. |
| HashData(ReadOnlySpan<Byte>) |
使用 MD5 算法计算数据的哈希值。Computes the hash of data using the MD5 algorithm. |
| HashData(ReadOnlySpan<Byte>, Span<Byte>) |
使用 MD5 算法计算数据的哈希值。Computes the hash of data using the MD5 algorithm. |
| 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() |
返回表示当前对象的字符串。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) |
| TryHashData(ReadOnlySpan<Byte>, Span<Byte>, Int32) |
尝试使用 MD5 算法计算数据的哈希值。Attempts to compute the hash of data using the MD5 algorithm. |
| 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) |