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author | Schanzenbach, Martin <mschanzenbach@posteo.de> | 2017-10-07 18:51:31 +0200 |
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committer | Schanzenbach, Martin <mschanzenbach@posteo.de> | 2017-10-07 18:51:31 +0200 |
commit | 40fa67d024c8d7cc7d6f2af1a557e0ecc59e60f0 (patch) | |
tree | 2065893fa7b9c61ce89e2b9687404be723f25ec2 /src | |
parent | 0729d3ff0b209fe2da270d98c967ad0acbdd49cb (diff) | |
download | gnunet-40fa67d024c8d7cc7d6f2af1a557e0ecc59e60f0.tar.gz gnunet-40fa67d024c8d7cc7d6f2af1a557e0ecc59e60f0.zip |
-add new jwt handling
Diffstat (limited to 'src')
-rw-r--r-- | src/identity-provider/jwt.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/identity-provider/jwt.c b/src/identity-provider/jwt.c new file mode 100644 index 000000000..c8bc67806 --- /dev/null +++ b/src/identity-provider/jwt.c | |||
@@ -0,0 +1,172 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | Copyright (C) 2010-2015 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 3, or (at your | ||
8 | option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | ||
18 | Boston, MA 02110-1301, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file identity-provider/jwt.c | ||
23 | * @brief helper library for JSON-Web-Tokens | ||
24 | * @author Martin Schanzenbach | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | #include "gnunet_signatures.h" | ||
29 | #include "identity_attribute.h" | ||
30 | #include <jansson.h> | ||
31 | |||
32 | |||
33 | #define JWT_ALG "alg" | ||
34 | |||
35 | /*TODO is this the correct way to define new algs? */ | ||
36 | #define JWT_ALG_VALUE "ED512" | ||
37 | |||
38 | #define JWT_TYP "typ" | ||
39 | |||
40 | #define JWT_TYP_VALUE "jwt" | ||
41 | |||
42 | static char* | ||
43 | create_jwt_header(void) | ||
44 | { | ||
45 | json_t *root; | ||
46 | char *json_str; | ||
47 | |||
48 | root = json_object (); | ||
49 | json_object_set_new (root, JWT_ALG, json_string (JWT_ALG_VALUE)); | ||
50 | json_object_set_new (root, JWT_TYP, json_string (JWT_TYP_VALUE)); | ||
51 | |||
52 | json_str = json_dumps (root, JSON_INDENT(1)); | ||
53 | json_decref (root); | ||
54 | return json_str; | ||
55 | } | ||
56 | |||
57 | /** | ||
58 | * Create a JWT from a ticket and attributes | ||
59 | * | ||
60 | * @param ticket the ticket | ||
61 | * @param attrs the attribute list | ||
62 | * @return a new base64-encoded JWT string. | ||
63 | */ | ||
64 | char* | ||
65 | jwt_create (const struct GNUNET_IDENTITY_PROVIDER_Ticket *ticket, | ||
66 | const struct GNUNET_IDENTITY_PROVIDER_AttributeList *attrs, | ||
67 | const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv_key) | ||
68 | { | ||
69 | struct GNUNET_IDENTITY_PROVIDER_AttributeListEntry *le; | ||
70 | struct GNUNET_CRYPTO_EcdsaSignature signature; | ||
71 | struct GNUNET_CRYPTO_EccSignaturePurpose *purpose; | ||
72 | char* audience; | ||
73 | char* issuer; | ||
74 | char* header; | ||
75 | char* padding; | ||
76 | char* body_str; | ||
77 | char* result; | ||
78 | char* header_base64; | ||
79 | char* body_base64; | ||
80 | char* signature_target; | ||
81 | char* signature_base64; | ||
82 | json_t* body; | ||
83 | |||
84 | /* TODO maybe we should use a local identity here */ | ||
85 | issuer = GNUNET_STRINGS_data_to_string_alloc (&ticket->identity, | ||
86 | sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)); | ||
87 | audience = GNUNET_STRINGS_data_to_string_alloc (&ticket->audience, | ||
88 | sizeof (struct GNUNET_CRYPTO_EcdsaPublicKey)); | ||
89 | header = create_jwt_header (); | ||
90 | body = json_object (); | ||
91 | /* TODO who is the issuer? local IdP or subject ? See self-issued tokens? */ | ||
92 | json_object_set_new (body, | ||
93 | "iss", json_string (issuer)); | ||
94 | json_object_set_new (body, | ||
95 | "sub", json_string (issuer)); | ||
96 | /* TODO what should be in here exactly? */ | ||
97 | json_object_set_new (body, | ||
98 | "aud", json_string (audience)); | ||
99 | for (le = attrs->list_head; NULL != le; le = le->next) | ||
100 | { | ||
101 | /** | ||
102 | * TODO here we should have a function that | ||
103 | * calls the Attribute plugins to create a | ||
104 | * json representation for its value | ||
105 | */ | ||
106 | json_object_set_new (body, | ||
107 | le->attribute->name, | ||
108 | json_string (le->attribute->data)); | ||
109 | } | ||
110 | body_str = json_dumps (body, JSON_INDENT(0)); | ||
111 | json_decref (body); | ||
112 | |||
113 | GNUNET_STRINGS_base64_encode (header, | ||
114 | strlen (header), | ||
115 | &header_base64); | ||
116 | //Remove GNUNET padding of base64 | ||
117 | padding = strtok(header_base64, "="); | ||
118 | while (NULL != padding) | ||
119 | padding = strtok(NULL, "="); | ||
120 | |||
121 | GNUNET_STRINGS_base64_encode (body_str, | ||
122 | strlen (body_str), | ||
123 | &body_base64); | ||
124 | |||
125 | //Remove GNUNET padding of base64 | ||
126 | padding = strtok(body_base64, "="); | ||
127 | while (NULL != padding) | ||
128 | padding = strtok(NULL, "="); | ||
129 | |||
130 | GNUNET_free (issuer); | ||
131 | GNUNET_free (audience); | ||
132 | |||
133 | /** | ||
134 | * TODO | ||
135 | * Creating the JWT signature. This might not be | ||
136 | * standards compliant, check. | ||
137 | */ | ||
138 | GNUNET_asprintf (&signature_target, "%s,%s", header_base64, body_base64); | ||
139 | |||
140 | purpose = | ||
141 | GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) + | ||
142 | strlen (signature_target)); | ||
143 | purpose->size = | ||
144 | htonl (strlen (signature_target) + sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose)); | ||
145 | purpose->purpose = htonl(GNUNET_SIGNATURE_PURPOSE_GNUID_TOKEN); | ||
146 | GNUNET_memcpy (&purpose[1], signature_target, strlen (signature_target)); | ||
147 | if (GNUNET_OK != GNUNET_CRYPTO_ecdsa_sign (priv_key, | ||
148 | purpose, | ||
149 | (struct GNUNET_CRYPTO_EcdsaSignature *)&signature)) | ||
150 | { | ||
151 | GNUNET_free (signature_target); | ||
152 | GNUNET_free (body_str); | ||
153 | GNUNET_free (body_base64); | ||
154 | GNUNET_free (header_base64); | ||
155 | GNUNET_free (purpose); | ||
156 | return NULL; | ||
157 | } | ||
158 | GNUNET_STRINGS_base64_encode ((const char*)&signature, | ||
159 | sizeof (struct GNUNET_CRYPTO_EcdsaSignature), | ||
160 | &signature_base64); | ||
161 | GNUNET_asprintf (&result, "%s.%s.%s", | ||
162 | header_base64, body_base64, signature_base64); | ||
163 | |||
164 | GNUNET_free (signature_target); | ||
165 | GNUNET_free (header); | ||
166 | GNUNET_free (body_str); | ||
167 | GNUNET_free (signature_base64); | ||
168 | GNUNET_free (body_base64); | ||
169 | GNUNET_free (header_base64); | ||
170 | GNUNET_free (purpose); | ||
171 | return result; | ||
172 | } | ||