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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
using JWT;
using JWT.Algorithms;
using JWT.Builder;
using JWT.Serializers;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
namespace Tango.Web.Security
{
public class WebToken
{
public DateTime Issued { get; protected set; }
public DateTime? Expiration { get; protected set; }
public String AccessToken { get; protected set; }
public String RefreshToken { get; protected set; }
public WebToken()
{
}
public static WebToken CreateNew(String secret, DateTime? expiration = null)
{
DateTime issued = DateTime.UtcNow;
var builder = new JwtBuilder()
.WithAlgorithm(new HMACSHA256Algorithm())
.WithSecret(secret)
.IssuedAt(issued);
if (expiration != null)
{
builder = builder.ExpirationTime(expiration.Value);
}
String refreshToken = Guid.NewGuid().ToString();
builder = builder.AddClaim("object", null);
builder = builder.AddClaim("refresh-token", refreshToken);
return new WebToken()
{
AccessToken = builder.Build(),
RefreshToken = refreshToken,
Expiration = expiration,
Issued = issued,
};
}
public static void Validate(String secret, String token)
{
var json = new JwtBuilder()
.WithSecret(secret)
.MustVerifySignature()
.Decode(token);
}
public void Validate(String secret)
{
var json = new JwtBuilder()
.WithSecret(secret)
.MustVerifySignature()
.Decode(AccessToken);
}
public WebToken Renew(String secret)
{
var newToken = CreateNew(secret, DateTime.UtcNow.Add(Expiration.Value - Issued));
newToken.RefreshToken = RefreshToken;
return newToken;
}
public static WebToken FromToken(String token)
{
WebToken webToken = new WebToken();
var payload = new JwtBuilder()
.WithValidator(null)
.Decode<IDictionary<string, object>>(token);
webToken.AccessToken = token;
if (payload.ContainsKey("exp"))
{
long exp = long.Parse(payload["exp"].ToString());
webToken.Expiration = ConvertEpochToDateTime(exp);
}
if (payload.ContainsKey("iat"))
{
long iat = long.Parse(payload["iat"].ToString());
webToken.Issued = ConvertEpochToDateTime(iat);
}
if (payload.ContainsKey("refresh-token"))
{
webToken.RefreshToken = payload["refresh-token"].ToString();
}
return webToken;
}
protected static DateTime ConvertEpochToDateTime(long seconds)
{
var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
return epoch.AddSeconds(seconds);
}
}
public class WebToken<T> : WebToken where T : class
{
public T Object { get; protected set; }
private WebToken()
{
}
public static WebToken<T> CreateNew(String secret, T obj = null, DateTime? expiration = null)
{
DateTime issued = DateTime.UtcNow;
var builder = new JwtBuilder()
.WithAlgorithm(new HMACSHA256Algorithm())
.WithSecret(secret)
.IssuedAt(issued);
if (expiration != null)
{
builder = builder.ExpirationTime(expiration.Value);
}
String refreshToken = Guid.NewGuid().ToString();
builder = builder.AddClaim("object", obj);
builder = builder.AddClaim("refresh-token", refreshToken);
return new WebToken<T>()
{
AccessToken = builder.Build(),
RefreshToken = refreshToken,
Expiration = expiration,
Issued = issued,
Object = obj,
};
}
public static new WebToken<T> FromToken(String token)
{
WebToken<T> webToken = new WebToken<T>();
var payload = new JwtBuilder()
.WithValidator(null)
.Decode<IDictionary<string, object>>(token);
webToken.AccessToken = token;
if (payload.ContainsKey("exp"))
{
long exp = long.Parse(payload["exp"].ToString());
webToken.Expiration = ConvertEpochToDateTime(exp);
}
if (payload.ContainsKey("iat"))
{
long iat = long.Parse(payload["iat"].ToString());
webToken.Issued = ConvertEpochToDateTime(iat);
}
if (payload.ContainsKey("refresh-token"))
{
webToken.RefreshToken = payload["refresh-token"].ToString();
}
webToken.Object = JsonConvert.DeserializeObject<T>(payload["object"].ToString());
return webToken;
}
public new WebToken<T> Renew(String secret)
{
var newToken = WebToken<T>.CreateNew(secret, Object, DateTime.UtcNow.Add(Expiration.Value - Issued));
newToken.RefreshToken = RefreshToken;
return newToken;
}
}
}
|
