forked from npgsql/npgsql
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathMD5SHA1.cs
More file actions
113 lines (109 loc) · 3.94 KB
/
MD5SHA1.cs
File metadata and controls
113 lines (109 loc) · 3.94 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
#if !DNXCORE50
#region License
// The PostgreSQL License
//
// Copyright (C) 2015 The Npgsql Development Team
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
namespace TlsClientStream
{
internal class MD5SHA1 : HashAlgorithm
{
private MD5CryptoServiceProvider _md5;
private SHA1CryptoServiceProvider _sha1;
public MD5SHA1()
{
_md5 = new MD5CryptoServiceProvider();
_sha1 = new SHA1CryptoServiceProvider();
}
//
// Summary:
// Releases the unmanaged resources used by the System.Security.Cryptography.HashAlgorithm
// and optionally releases the managed resources.
//
// Parameters:
// disposing:
// true to release both managed and unmanaged resources; false to release only
// unmanaged resources.
protected override void Dispose(bool disposing)
{
_md5.Dispose();
_sha1.Dispose();
if (HashValue != null)
Array.Clear(HashValue, 0, 36);
HashValue = null;
}
//
// Summary:
// When overridden in a derived class, routes data written to the object into
// the hash algorithm for computing the hash.
//
// Parameters:
// array:
// The input to compute the hash code for.
//
// ibStart:
// The offset into the byte array from which to begin using data.
//
// cbSize:
// The number of bytes in the byte array to use as data.
protected override void HashCore(byte[] array, int ibStart, int cbSize)
{
_md5.TransformBlock(array, ibStart, cbSize);
_sha1.TransformBlock(array, ibStart, cbSize);
}
//
// Summary:
// When overridden in a derived class, finalizes the hash computation after
// the last data is processed by the cryptographic stream object.
//
// Returns:
// The computed hash code.
protected override byte[] HashFinal()
{
byte[] hash = new byte[36];
_md5.TransformFinalBlock(hash, 0, 0);
_sha1.TransformFinalBlock(hash, 0, 0);
var md5Hash = _md5.Hash;
var sha1Hash = _sha1.Hash;
Buffer.BlockCopy(md5Hash, 0, hash, 0, 16);
Buffer.BlockCopy(sha1Hash, 0, hash, 16, 20);
Array.Clear(md5Hash, 0, 16);
Array.Clear(sha1Hash, 0, 20);
HashValue = hash;
return hash;
}
//
// Summary:
// Initializes an implementation of the System.Security.Cryptography.HashAlgorithm
// class.
public override void Initialize()
{
_md5.Initialize();
_sha1.Initialize();
}
}
}
#endif