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
|
//-----------------------------------------------------------------------
// <copyright file="AssociateRequestRelyingParty.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OpenId.Messages {
using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
using System.Text;
using DotNetOpenAuth.OpenId.RelyingParty;
/// <summary>
/// Utility methods for requesting associations from the relying party.
/// </summary>
internal static class AssociateRequestRelyingParty {
/// <summary>
/// Creates an association request message that is appropriate for a given Provider.
/// </summary>
/// <param name="securityRequirements">The set of requirements the selected association type must comply to.</param>
/// <param name="provider">The provider to create an association with.</param>
/// <returns>
/// The message to send to the Provider to request an association.
/// Null if no association could be created that meet the security requirements
/// and the provider OpenID version.
/// </returns>
internal static AssociateRequest Create(SecuritySettings securityRequirements, IProviderEndpoint provider) {
Requires.NotNull(securityRequirements, "securityRequirements");
Requires.NotNull(provider, "provider");
// Apply our knowledge of the endpoint's transport, OpenID version, and
// security requirements to decide the best association.
bool unencryptedAllowed = provider.Uri.IsTransportSecure();
bool useDiffieHellman = !unencryptedAllowed;
string associationType, sessionType;
if (!HmacShaAssociation.TryFindBestAssociation(Protocol.Lookup(provider.Version), true, securityRequirements, useDiffieHellman, out associationType, out sessionType)) {
// There are no associations that meet all requirements.
Logger.OpenId.Warn("Security requirements and protocol combination knock out all possible association types. Dumb mode forced.");
return null;
}
return Create(securityRequirements, provider, associationType, sessionType);
}
/// <summary>
/// Creates an association request message that is appropriate for a given Provider.
/// </summary>
/// <param name="securityRequirements">The set of requirements the selected association type must comply to.</param>
/// <param name="provider">The provider to create an association with.</param>
/// <param name="associationType">Type of the association.</param>
/// <param name="sessionType">Type of the session.</param>
/// <returns>
/// The message to send to the Provider to request an association.
/// Null if no association could be created that meet the security requirements
/// and the provider OpenID version.
/// </returns>
internal static AssociateRequest Create(SecuritySettings securityRequirements, IProviderEndpoint provider, string associationType, string sessionType) {
Requires.NotNull(securityRequirements, "securityRequirements");
Requires.NotNull(provider, "provider");
Requires.NotNullOrEmpty(associationType, "associationType");
Requires.NotNull(sessionType, "sessionType");
bool unencryptedAllowed = provider.Uri.IsTransportSecure();
if (unencryptedAllowed) {
var associateRequest = new AssociateUnencryptedRequest(provider.Version, provider.Uri);
associateRequest.AssociationType = associationType;
return associateRequest;
} else {
if (OpenIdUtilities.IsDiffieHellmanPresent) {
var associateRequest = new AssociateDiffieHellmanRequest(provider.Version, provider.Uri);
associateRequest.AssociationType = associationType;
associateRequest.SessionType = sessionType;
associateRequest.InitializeRequest();
return associateRequest;
} else {
return null;
}
}
}
}
}
|
