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
|
//-----------------------------------------------------------------------
// <copyright file="Entropy.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace System.IdentityModel.Protocols.WSTrust
{
using System.IdentityModel.Tokens;
/// <summary>
/// The Entropy used in both token request message and token response message.
/// </summary>
public class Entropy : ProtectedKey
{
/// <summary>
/// Use this constructor to create an Entropy object with some randomly generated bytes.
/// </summary>
/// <param name="entropySizeInBits">The entropySizeInBits of the key material inside the entropy.</param>
public Entropy( int entropySizeInBits )
: this( CryptoHelper.GenerateRandomBytes( entropySizeInBits ) )
{
}
/// <summary>
/// Constructor for sending entropy in binary secret format.
/// </summary>
/// <param name="secret">The key material.</param>
public Entropy( byte[] secret )
: base( secret )
{
}
/// <summary>
/// Constructor for sending entropy in encrypted key format.
/// </summary>
/// <param name="secret">The key material.</param>
/// <param name="wrappingCredentials">The encrypting credentials used to encrypt the key material.</param>
public Entropy( byte[] secret, EncryptingCredentials wrappingCredentials )
: base( secret, wrappingCredentials )
{
}
/// <summary>
/// Constructs an entropy instance with the protected key.
/// </summary>
/// <param name="protectedKey">The protected key which can be either binary secret or encrypted key.</param>
public Entropy( ProtectedKey protectedKey )
: base( GetKeyBytesFromProtectedKey( protectedKey ), GetWrappingCredentialsFromProtectedKey( protectedKey ) )
{
}
static byte[] GetKeyBytesFromProtectedKey( ProtectedKey protectedKey )
{
if ( protectedKey == null )
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "protectedKey" );
}
return protectedKey.GetKeyBytes();
}
static EncryptingCredentials GetWrappingCredentialsFromProtectedKey( ProtectedKey protectedKey )
{
if ( protectedKey == null )
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull( "protectedKey" );
}
return protectedKey.WrappingCredentials;
}
}
}
|
