1 | #Region "Microsoft.VisualBasic::a6c09009091285fce2178f685885711e, Microsoft.VisualBasic.Core\Extensions\Security\Md5HashProvider.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Class Md5HashProvider |
35 | ' |
36 | ' Function: GetMd5Bytes, (+2 Overloads) GetMd5Hash, GetMd5hashLong |
37 | ' |
38 | ' Sub: (+2 Overloads) Dispose |
39 | ' |
40 | ' |
41 | ' /********************************************************************************/ |
42 | |
43 | #End Region |
44 | |
45 | Imports System.Runtime.CompilerServices |
46 | Imports System.Security.Cryptography |
47 | Imports System.Text |
48 | |
49 | Namespace SecurityString |
50 | |
51 | ''' <summary> |
52 | ''' 并行化的需求 |
53 | ''' </summary> |
54 | ''' <remarks></remarks> |
55 | Public Class Md5HashProvider : Implements IDisposable |
56 | |
57 | ReadOnly md5Hash As MD5 = Security.Cryptography.MD5.Create() |
58 | |
59 | Public Function GetMd5Hash(input As String) As String |
60 | If String.IsNullOrEmpty(input) Then |
61 | Return "" |
62 | End If |
63 | |
64 | ' Convert the input string to a byte array and compute the hash. |
65 | Dim data As Byte() = Encoding.UTF8.GetBytes(input) |
66 | Return GetMd5Hash(input:=data) |
67 | End Function |
68 | |
69 | Public Function GetMd5Bytes(input As Byte()) As Byte() |
70 | If input.IsNullOrEmpty Then |
71 | Return {} |
72 | End If |
73 | |
74 | Dim data As Byte() = md5Hash.ComputeHash(input) |
75 | Return data |
76 | End Function |
77 | |
78 | ''' <summary> |
79 | ''' <see cref="MD5.ComputeHash"/> -> <see cref="ToLong"/> |
80 | ''' </summary> |
81 | ''' <param name="input"></param> |
82 | ''' <returns></returns> |
83 | ''' |
84 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
85 | Public Function GetMd5hashLong(input As Byte()) As Long |
86 | Return GetMd5Bytes(input).ToLong |
87 | End Function |
88 | |
89 | Public Function GetMd5Hash(input As Byte()) As String |
90 | If input.IsNullOrEmpty Then |
91 | Return "" |
92 | End If |
93 | |
94 | ' Convert the input string to a byte array and compute the hash. |
95 | Dim data As Byte() = md5Hash.ComputeHash(input) |
96 | ' Create a new Stringbuilder to collect the bytes |
97 | ' and create a string. |
98 | Dim sBuilder As New StringBuilder() |
99 | |
100 | ' Loop through each byte of the hashed data |
101 | ' and format each one as a hexadecimal string. |
102 | For i As Integer = 0 To data.Length - 1 |
103 | sBuilder.Append(data(i).ToString("x2")) |
104 | Next i |
105 | |
106 | ' Return the hexadecimal string. |
107 | Return sBuilder.ToString() |
108 | End Function |
109 | |
110 | #Region "IDisposable Support" |
111 | Private disposedValue As Boolean ' To detect redundant calls |
112 | |
113 | ' IDisposable |
114 | Protected Overridable Sub Dispose(disposing As Boolean) |
115 | If Not disposedValue Then |
116 | If disposing Then |
117 | ' TODO: dispose managed state (managed objects). |
118 | Call md5Hash.Dispose() |
119 | End If |
120 | |
121 | ' TODO: free unmanaged resources (unmanaged objects) and override Finalize() below. |
122 | ' TODO: set large fields to null. |
123 | End If |
124 | disposedValue = True |
125 | End Sub |
126 | |
127 | ' TODO: override Finalize() only if Dispose(disposing As Boolean) above has code to free unmanaged resources. |
128 | 'Protected Overrides Sub Finalize() |
129 | ' ' Do not change this code. Put cleanup code in Dispose(disposing As Boolean) above. |
130 | ' Dispose(False) |
131 | ' MyBase.Finalize() |
132 | 'End Sub |
133 | |
134 | ' This code added by Visual Basic to correctly implement the disposable pattern. |
135 | Public Sub Dispose() Implements IDisposable.Dispose |
136 | ' Do not change this code. Put cleanup code in Dispose(disposing As Boolean) above. |
137 | Dispose(True) |
138 | GC.SuppressFinalize(Me) |
139 | End Sub |
140 | #End Region |
141 | End Class |
142 | End Namespace |