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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#ifndef HEADER_CURL_SASL_H
#define HEADER_CURL_SASL_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2012 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include <curl/curl.h>
struct SessionHandle;
struct connectdata;
#if !defined(CURL_DISABLE_CRYPTO_AUTH)
struct digestdata;
#endif
#if defined(USE_NTLM)
struct ntlmdata;
#endif
#if defined(USE_KERBEROS5)
struct kerberos5data;
#endif
/* Authentication mechanism flags */
#define SASL_MECH_LOGIN (1 << 0)
#define SASL_MECH_PLAIN (1 << 1)
#define SASL_MECH_CRAM_MD5 (1 << 2)
#define SASL_MECH_DIGEST_MD5 (1 << 3)
#define SASL_MECH_GSSAPI (1 << 4)
#define SASL_MECH_EXTERNAL (1 << 5)
#define SASL_MECH_NTLM (1 << 6)
#define SASL_MECH_XOAUTH2 (1 << 7)
#define SASL_MECH_OAUTHBEARER (1 << 8)
/* Authentication mechanism values */
#define SASL_AUTH_NONE 0
#define SASL_AUTH_ANY ~0U
#define SASL_AUTH_DEFAULT (SASL_AUTH_ANY & ~SASL_MECH_EXTERNAL)
/* Authentication mechanism strings */
#define SASL_MECH_STRING_LOGIN "LOGIN"
#define SASL_MECH_STRING_PLAIN "PLAIN"
#define SASL_MECH_STRING_CRAM_MD5 "CRAM-MD5"
#define SASL_MECH_STRING_DIGEST_MD5 "DIGEST-MD5"
#define SASL_MECH_STRING_GSSAPI "GSSAPI"
#define SASL_MECH_STRING_EXTERNAL "EXTERNAL"
#define SASL_MECH_STRING_NTLM "NTLM"
#define SASL_MECH_STRING_XOAUTH2 "XOAUTH2"
#define SASL_MECH_STRING_OAUTHBEARER "OAUTHBEARER"
#if !defined(CURL_DISABLE_CRYPTO_AUTH)
#define DIGEST_MAX_VALUE_LENGTH 256
#define DIGEST_MAX_CONTENT_LENGTH 1024
#endif
enum {
CURLDIGESTALGO_MD5,
CURLDIGESTALGO_MD5SESS
};
/* SASL machine states */
typedef enum {
SASL_STOP,
SASL_PLAIN,
SASL_LOGIN,
SASL_LOGIN_PASSWD,
SASL_EXTERNAL,
SASL_CRAMMD5,
SASL_DIGESTMD5,
SASL_DIGESTMD5_RESP,
SASL_NTLM,
SASL_NTLM_TYPE2MSG,
SASL_GSSAPI,
SASL_GSSAPI_TOKEN,
SASL_GSSAPI_NO_DATA,
SASL_OAUTH2,
SASL_OAUTH2_RESP,
SASL_CANCEL,
SASL_FINAL
} saslstate;
/* Progress indicator */
typedef enum {
SASL_IDLE,
SASL_INPROGRESS,
SASL_DONE
} saslprogress;
/* Protocol dependent SASL parameters */
struct SASLproto {
const char *service; /* The service name */
int contcode; /* Code to receive when continuation is expected */
int finalcode; /* Code to receive upon authentication success */
size_t maxirlen; /* Maximum initial response length */
CURLcode (*sendauth)(struct connectdata *conn,
const char *mech, const char *ir);
/* Send authentication command */
CURLcode (*sendcont)(struct connectdata *conn, const char *contauth);
/* Send authentication continuation */
void (*getmessage)(char *buffer, char **outptr);
/* Get SASL response message */
};
/* Per-connection parameters */
struct SASL {
const struct SASLproto *params; /* Protocol dependent parameters */
saslstate state; /* Current machine state */
unsigned int authmechs; /* Accepted authentication mechanisms */
unsigned int prefmech; /* Preferred authentication mechanism */
unsigned int authused; /* Auth mechanism used for the connection */
bool resetprefs; /* For URL auth option parsing. */
bool mutual_auth; /* Mutual authentication enabled (GSSAPI only) */
bool force_ir; /* Protocol always supports initial response */
};
/* This is used to test whether the line starts with the given mechanism */
#define sasl_mech_equal(line, wordlen, mech) \
(wordlen == (sizeof(mech) - 1) / sizeof(char) && \
!memcmp(line, mech, wordlen))
/* This is used to build a SPN string */
#if !defined(USE_WINDOWS_SSPI)
char *Curl_sasl_build_spn(const char *service, const char *instance);
#else
TCHAR *Curl_sasl_build_spn(const char *service, const char *instance);
#endif
#if defined(HAVE_GSSAPI)
char *Curl_sasl_build_gssapi_spn(const char *service, const char *instance);
#endif
#ifndef CURL_DISABLE_CRYPTO_AUTH
/* This is used to extract the realm from a challenge message */
int Curl_sasl_digest_get_pair(const char *str, char *value, char *content,
const char **endptr);
/* This is used to generate a base64 encoded DIGEST-MD5 response message */
CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
const char *chlg64,
const char *userp,
const char *passwdp,
const char *service,
char **outptr, size_t *outlen);
/* This is used to decode a HTTP DIGEST challenge message */
CURLcode Curl_sasl_decode_digest_http_message(const char *chlg,
struct digestdata *digest);
/* This is used to generate a HTTP DIGEST response message */
CURLcode Curl_sasl_create_digest_http_message(struct SessionHandle *data,
const char *userp,
const char *passwdp,
const unsigned char *request,
const unsigned char *uri,
struct digestdata *digest,
char **outptr, size_t *outlen);
/* This is used to clean up the digest specific data */
void Curl_sasl_digest_cleanup(struct digestdata *digest);
#endif
#ifdef USE_NTLM
/* This is used to generate a base64 encoded NTLM type-1 message */
CURLcode Curl_sasl_create_ntlm_type1_message(const char *userp,
const char *passwdp,
struct ntlmdata *ntlm,
char **outptr,
size_t *outlen);
/* This is used to decode a base64 encoded NTLM type-2 message */
CURLcode Curl_sasl_decode_ntlm_type2_message(struct SessionHandle *data,
const char *type2msg,
struct ntlmdata *ntlm);
/* This is used to generate a base64 encoded NTLM type-3 message */
CURLcode Curl_sasl_create_ntlm_type3_message(struct SessionHandle *data,
const char *userp,
const char *passwdp,
struct ntlmdata *ntlm,
char **outptr, size_t *outlen);
/* This is used to clean up the ntlm specific data */
void Curl_sasl_ntlm_cleanup(struct ntlmdata *ntlm);
#endif /* USE_NTLM */
#if defined(USE_KERBEROS5)
/* This is used to generate a base64 encoded GSSAPI (Kerberos V5) user token
message */
CURLcode Curl_sasl_create_gssapi_user_message(struct SessionHandle *data,
const char *userp,
const char *passwdp,
const char *service,
const bool mutual,
const char *chlg64,
struct kerberos5data *krb5,
char **outptr, size_t *outlen);
/* This is used to generate a base64 encoded GSSAPI (Kerberos V5) security
token message */
CURLcode Curl_sasl_create_gssapi_security_message(struct SessionHandle *data,
const char *input,
struct kerberos5data *krb5,
char **outptr,
size_t *outlen);
/* This is used to clean up the gssapi specific data */
void Curl_sasl_gssapi_cleanup(struct kerberos5data *krb5);
#endif /* USE_KERBEROS5 */
/* This is used to cleanup any libraries or curl modules used by the sasl
functions */
void Curl_sasl_cleanup(struct connectdata *conn, unsigned int authused);
/* Convert a mechanism name to a token */
unsigned int Curl_sasl_decode_mech(const char *ptr,
size_t maxlen, size_t *len);
/* Parse the URL login options */
CURLcode Curl_sasl_parse_url_auth_option(struct SASL *sasl,
const char *value, size_t len);
/* Initializes an SASL structure */
void Curl_sasl_init(struct SASL *sasl, const struct SASLproto *params);
/* Check if we have enough auth data and capabilities to authenticate */
bool Curl_sasl_can_authenticate(struct SASL *sasl, struct connectdata *conn);
/* Calculate the required login details for SASL authentication */
CURLcode Curl_sasl_start(struct SASL *sasl, struct connectdata *conn,
bool force_ir, saslprogress *progress);
/* Continue an SASL authentication */
CURLcode Curl_sasl_continue(struct SASL *sasl, struct connectdata *conn,
int code, saslprogress *progress);
#endif /* HEADER_CURL_SASL_H */
|
