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
|
/* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
/*** Basic authentication ***/
#include <serf.h>
#include <serf_private.h>
#include <auth/auth.h>
#include <apr.h>
#include <apr_base64.h>
#include <apr_strings.h>
/* Stores the context information related to Basic authentication.
This information is stored in the per server cache in the serf context. */
typedef struct basic_authn_info_t {
const char *header;
const char *value;
} basic_authn_info_t;
apr_status_t
serf__handle_basic_auth(int code,
serf_request_t *request,
serf_bucket_t *response,
const char *auth_hdr,
const char *auth_attr,
void *baton,
apr_pool_t *pool)
{
const char *tmp;
apr_size_t tmp_len;
serf_connection_t *conn = request->conn;
serf_context_t *ctx = conn->ctx;
serf__authn_info_t *authn_info;
basic_authn_info_t *basic_info;
apr_status_t status;
apr_pool_t *cred_pool;
char *username, *password, *realm_name;
const char *eq, *realm = NULL;
/* Can't do Basic authentication if there's no callback to get
username & password. */
if (!ctx->cred_cb) {
return SERF_ERROR_AUTHN_FAILED;
}
if (code == 401) {
authn_info = serf__get_authn_info_for_server(conn);
} else {
authn_info = &ctx->proxy_authn_info;
}
basic_info = authn_info->baton;
realm_name = NULL;
eq = strchr(auth_attr, '=');
if (eq && strncasecmp(auth_attr, "realm", 5) == 0) {
realm_name = apr_pstrdup(pool, eq + 1);
if (realm_name[0] == '\"') {
apr_size_t realm_len;
realm_len = strlen(realm_name);
if (realm_name[realm_len - 1] == '\"') {
realm_name[realm_len - 1] = '\0';
realm_name++;
}
}
if (!realm_name) {
return SERF_ERROR_AUTHN_MISSING_ATTRIBUTE;
}
realm = serf__construct_realm(code == 401 ? HOST : PROXY,
conn, realm_name,
pool);
}
/* Ask the application for credentials */
apr_pool_create(&cred_pool, pool);
status = serf__provide_credentials(ctx,
&username, &password,
request, baton,
code, authn_info->scheme->name,
realm, cred_pool);
if (status) {
apr_pool_destroy(cred_pool);
return status;
}
tmp = apr_pstrcat(conn->pool, username, ":", password, NULL);
tmp_len = strlen(tmp);
apr_pool_destroy(cred_pool);
serf__encode_auth_header(&basic_info->value,
authn_info->scheme->name,
tmp, tmp_len, pool);
basic_info->header = (code == 401) ? "Authorization" : "Proxy-Authorization";
return APR_SUCCESS;
}
apr_status_t
serf__init_basic(int code,
serf_context_t *ctx,
apr_pool_t *pool)
{
return APR_SUCCESS;
}
/* For Basic authentication we expect all authn info to be the same for all
connections in the context to the same server (same realm, username,
password). Therefore we can keep the header value in the per-server store
context instead of per connection.
TODO: we currently don't cache this info per realm, so each time a request
'switches realms', we have to ask the application for new credentials. */
apr_status_t
serf__init_basic_connection(const serf__authn_scheme_t *scheme,
int code,
serf_connection_t *conn,
apr_pool_t *pool)
{
serf_context_t *ctx = conn->ctx;
serf__authn_info_t *authn_info;
if (code == 401) {
authn_info = serf__get_authn_info_for_server(conn);
} else {
authn_info = &ctx->proxy_authn_info;
}
if (!authn_info->baton) {
authn_info->baton = apr_pcalloc(pool, sizeof(basic_authn_info_t));
}
return APR_SUCCESS;
}
apr_status_t
serf__setup_request_basic_auth(peer_t peer,
int code,
serf_connection_t *conn,
serf_request_t *request,
const char *method,
const char *uri,
serf_bucket_t *hdrs_bkt)
{
serf_context_t *ctx = conn->ctx;
serf__authn_info_t *authn_info;
basic_authn_info_t *basic_info;
if (peer == HOST) {
authn_info = serf__get_authn_info_for_server(conn);
} else {
authn_info = &ctx->proxy_authn_info;
}
basic_info = authn_info->baton;
if (basic_info && basic_info->header && basic_info->value) {
serf_bucket_headers_setn(hdrs_bkt, basic_info->header,
basic_info->value);
return APR_SUCCESS;
}
return SERF_ERROR_AUTHN_FAILED;
}
|
