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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
#include "rgw_os_auth.h"
#include "rgw_rest.h"
#include "common/ceph_crypto.h"
#include "common/Clock.h"
#include "auth/Crypto.h"
using namespace ceph::crypto;
static RGW_OS_Auth_Get rgw_os_auth_get;
static int build_token(string& os_user, string& key, uint64_t nonce, utime_t& expiration, bufferlist& bl)
{
::encode(os_user, bl);
::encode(nonce, bl);
::encode(expiration, bl);
bufferptr p(CEPH_CRYPTO_HMACSHA1_DIGESTSIZE);
char buf[bl.length() * 2 + 1];
buf_to_hex((const unsigned char *)bl.c_str(), bl.length(), buf);
RGW_LOG(0) << "bl=" << buf << std::endl;
char k[CEPH_CRYPTO_HMACSHA1_DIGESTSIZE];
memset(k, 0, sizeof(k));
const char *s = key.c_str();
for (int i = 0; i < (int)key.length(); i++, s++) {
k[i % CEPH_CRYPTO_HMACSHA1_DIGESTSIZE] |= *s;
}
calc_hmac_sha1(k, sizeof(k), bl.c_str(), bl.length(), p.c_str());
bl.append(p);
return 0;
}
static int encode_token(string& os_user, string& key, bufferlist& bl)
{
uint64_t nonce;
int ret = get_random_bytes((char *)&nonce, sizeof(nonce));
if (ret < 0)
return ret;
utime_t expiration = g_clock.now();
expiration += RGW_OS_TOKEN_EXPIRATION; // 15 minutes
ret = build_token(os_user, key, nonce, expiration, bl);
return ret;
}
int hexdigit(char c)
{
if (c >= '0' && c <= '9')
return (c - '0');
c = toupper(c);
if (c >= 'A' && c <= 'F')
return c - 'A' + 0xa;
return -EINVAL;
}
int hex_to_buf(const char *hex, char *buf, int len)
{
int i = 0;
const char *p = hex;
while (*p) {
if (i >= len)
return -EINVAL;
buf[i] = 0;
int d = hexdigit(*p);
if (d < 0)
return d;
buf[i] = d << 4;
p++;
if (!*p)
return -EINVAL;
d = hexdigit(*p);
if (d < 0)
return -d;
buf[i] += d;
i++;
p++;
}
return i;
}
int rgw_os_verify_signed_token(const char *token, RGWUserInfo& info)
{
if (strncmp(token, "AUTH_rgwtk", 10) != 0)
return -EINVAL;
token += 10;
int len = strlen(token);
if (len & 1) {
RGW_LOG(0) << "invalid token length" << std::endl;
return -EINVAL;
}
bufferptr p(len/2);
int ret = hex_to_buf(token, p.c_str(), len);
if (ret < 0)
return ret;
bufferlist bl;
bl.append(p);
bufferlist::iterator iter = bl.begin();
uint64_t nonce;
utime_t expiration;
string os_user;
string s3_user;
try {
::decode(os_user, iter);
::decode(nonce, iter);
::decode(expiration, iter);
} catch (buffer::error *err) {
RGW_LOG(0) << "failed to decode token" << std::endl;
return -EINVAL;
}
if (expiration < g_clock.now()) {
RGW_LOG(0) << "old timed out token was used now=" << g_clock.now() << " token.expiration=" << expiration << std::endl;
return -EPERM;
}
if ((ret = rgw_get_uid_by_openstack(os_user, s3_user, info)) < 0)
return ret;
RGW_LOG(0) << "os_user=" << os_user << std::endl;
bufferlist tok;
ret = build_token(os_user, info.openstack_key, nonce, expiration, tok);
if (ret < 0)
return ret;
if (tok.length() != bl.length()) {
RGW_LOG(0) << "tokens length mismatch: bl.length()=" << bl.length() << " tok.length()=" << tok.length() << std::endl;
return -EPERM;
}
if (memcmp(tok.c_str(), bl.c_str(), tok.length()) != 0) {
char buf[tok.length() * 2 + 1];
buf_to_hex((const unsigned char *)tok.c_str(), tok.length(), buf);
RGW_LOG(0) << "tokens mismatch tok=" << buf << std::endl;
return -EPERM;
}
return 0;
}
void RGW_OS_Auth_Get::execute()
{
int ret = -EPERM;
RGW_LOG(0) << "RGW_OS_Auth_Get::execute()" << std::endl;
const char *key = FCGX_GetParam("HTTP_X_AUTH_KEY", s->fcgx->envp);
const char *user = FCGX_GetParam("HTTP_X_AUTH_USER", s->fcgx->envp);
const char *url_prefix = FCGX_GetParam("RGW_OPENSTACK_URL_PREFIX", s->fcgx->envp);
const char *os_url = FCGX_GetParam("RGW_OPENSTACK_URL", s->fcgx->envp);
string user_str = user;
string user_id;
RGWUserInfo info;
bufferlist bl;
if (!os_url || !url_prefix) {
RGW_LOG(0) << "server is misconfigured, missing RGW_OPENSTACK_URL_PREFIX or RGW_OPENSTACK_URL" << std::endl;
ret = -EINVAL;
goto done;
}
if (!key || !user)
goto done;
if ((ret = rgw_get_uid_by_openstack(user_str, user_id, info)) < 0)
goto done;
if (info.openstack_key.compare(key) != 0) {
RGW_LOG(0) << "RGW_OS_Auth_Get::execute(): bad openstack key" << std::endl;
ret = -EPERM;
goto done;
}
CGI_PRINTF(s, "X-Storage-Url: %s/%s/v1/AUTH_rgw\n", os_url, url_prefix);
if ((ret = encode_token(info.openstack_name, info.openstack_key, bl)) < 0)
goto done;
{
char buf[bl.length() * 2 + 1];
buf_to_hex((const unsigned char *)bl.c_str(), bl.length(), buf);
CGI_PRINTF(s, "X-Storage-Token: AUTH_rgwtk%s\n", buf);
}
ret = 204;
done:
set_req_state_err(s, ret);
dump_errno(s);
end_header(s);
}
bool RGWHandler_OS_Auth::authorize(struct req_state *s)
{
return true;
}
RGWOp *RGWHandler_OS_Auth::get_op()
{
RGWOp *op;
switch (s->op) {
case OP_GET:
op = &rgw_os_auth_get;
break;
default:
return NULL;
}
if (op) {
op->init(s);
}
return op;
}
|
