143 lines
4.8 KiB
VB.net
143 lines
4.8 KiB
VB.net
#Region "Microsoft.VisualBasic::c81fb0eed5a2e47aa2f57020a9833ef1, Microsoft.VisualBasic.Core\Extensions\Security\Md5HashProvider.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class Md5HashProvider
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'
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' Function: GetMd5Bytes, (+2 Overloads) GetMd5Hash, GetMd5hashLong
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'
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' Sub: (+2 Overloads) Dispose
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Runtime.CompilerServices
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Imports System.Security.Cryptography
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Imports System.Text
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Namespace SecurityString
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''' <summary>
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''' 并行化的需求
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''' </summary>
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''' <remarks></remarks>
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Public Class Md5HashProvider : Implements IDisposable
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ReadOnly md5Hash As MD5 = Security.Cryptography.MD5.Create()
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Public Function GetMd5Hash(input As String) As String
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If String.IsNullOrEmpty(input) Then
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Return ""
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End If
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' Convert the input string to a byte array and compute the hash.
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Dim data As Byte() = Encoding.UTF8.GetBytes(input)
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Return GetMd5Hash(input:=data)
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End Function
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Public Function GetMd5Bytes(input As Byte()) As Byte()
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If input.IsNullOrEmpty Then
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Return {}
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End If
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Dim data As Byte() = md5Hash.ComputeHash(input)
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Return data
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End Function
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''' <summary>
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''' <see cref="MD5.ComputeHash"/> -> <see cref="ToLong"/>
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''' </summary>
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''' <param name="input"></param>
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''' <returns></returns>
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'''
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function GetMd5hashLong(input As Byte()) As Long
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Return GetMd5Bytes(input).ToLong
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End Function
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Public Function GetMd5Hash(input As Byte()) As String
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If input.IsNullOrEmpty Then
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Return ""
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End If
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' Convert the input string to a byte array and compute the hash.
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Dim data As Byte() = md5Hash.ComputeHash(input)
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' Create a new Stringbuilder to collect the bytes
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' and create a string.
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Dim sBuilder As New StringBuilder()
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' Loop through each byte of the hashed data
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' and format each one as a hexadecimal string.
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For i As Integer = 0 To data.Length - 1
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sBuilder.Append(data(i).ToString("x2"))
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Next i
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' Return the hexadecimal string.
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Return sBuilder.ToString()
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End Function
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#Region "IDisposable Support"
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Private disposedValue As Boolean ' To detect redundant calls
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' IDisposable
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Protected Overridable Sub Dispose(disposing As Boolean)
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If Not disposedValue Then
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If disposing Then
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' TODO: dispose managed state (managed objects).
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Call md5Hash.Dispose()
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End If
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' TODO: free unmanaged resources (unmanaged objects) and override Finalize() below.
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' TODO: set large fields to null.
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End If
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disposedValue = True
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End Sub
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' TODO: override Finalize() only if Dispose(disposing As Boolean) above has code to free unmanaged resources.
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'Protected Overrides Sub Finalize()
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' ' Do not change this code. Put cleanup code in Dispose(disposing As Boolean) above.
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' Dispose(False)
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' MyBase.Finalize()
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'End Sub
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' This code added by Visual Basic to correctly implement the disposable pattern.
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Public Sub Dispose() Implements IDisposable.Dispose
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' Do not change this code. Put cleanup code in Dispose(disposing As Boolean) above.
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Dispose(True)
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GC.SuppressFinalize(Me)
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End Sub
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#End Region
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End Class
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End Namespace
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