summaryrefslogtreecommitdiffstats
path: root/Utilities/cmcurl/lib/http_negotiate.c
blob: ddcd65b3b9cb6881c2af1764b688b5b27cb7d827 (plain)
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
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2016, 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_setup.h"

#if !defined(CURL_DISABLE_HTTP) && defined(USE_SPNEGO)

#include "urldata.h"
#include "sendf.h"
#include "http_negotiate.h"
#include "vauth/vauth.h"

/* The last 3 #include files should be in this order */
#include "curl_printf.h"
#include "curl_memory.h"
#include "memdebug.h"

CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
                              const char *header)
{
  CURLcode result;
  struct Curl_easy *data = conn->data;
  size_t len;

  /* Point to the username, password, service and host */
  const char *userp;
  const char *passwdp;
  const char *service;
  const char *host;

  /* Point to the correct struct with this */
  struct negotiatedata *neg_ctx;

  if(proxy) {
    userp = conn->http_proxy.user;
    passwdp = conn->http_proxy.passwd;
    service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
              data->set.str[STRING_PROXY_SERVICE_NAME] : "HTTP";
    host = conn->http_proxy.host.name;
    neg_ctx = &data->state.proxyneg;
  }
  else {
    userp = conn->user;
    passwdp = conn->passwd;
    service = data->set.str[STRING_SERVICE_NAME] ?
              data->set.str[STRING_SERVICE_NAME] : "HTTP";
    host = conn->host.name;
    neg_ctx = &data->state.negotiate;
  }

  /* Not set means empty */
  if(!userp)
    userp = "";

  if(!passwdp)
    passwdp = "";

  /* Obtain the input token, if any */
  header += strlen("Negotiate");
  while(*header && ISSPACE(*header))
    header++;

  len = strlen(header);
  if(!len) {
    /* Is this the first call in a new negotiation? */
    if(neg_ctx->context) {
      /* The server rejected our authentication and hasn't suppled any more
      negotiation mechanisms */
      return CURLE_LOGIN_DENIED;
    }
  }

  /* Initialize the security context and decode our challenge */
  result = Curl_auth_decode_spnego_message(data, userp, passwdp, service,
                                           host, header, neg_ctx);

  if(result)
    Curl_auth_spnego_cleanup(neg_ctx);

  return result;
}

CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
{
  struct negotiatedata *neg_ctx = proxy ? &conn->data->state.proxyneg :
    &conn->data->state.negotiate;
  char *base64 = NULL;
  size_t len = 0;
  char *userp;
  CURLcode result;

  result = Curl_auth_create_spnego_message(conn->data, neg_ctx, &base64, &len);
  if(result)
    return result;

  userp = aprintf("%sAuthorization: Negotiate %s\r\n", proxy ? "Proxy-" : "",
                  base64);

  if(proxy) {
    Curl_safefree(conn->allocptr.proxyuserpwd);
    conn->allocptr.proxyuserpwd = userp;
  }
  else {
    Curl_safefree(conn->allocptr.userpwd);
    conn->allocptr.userpwd = userp;
  }

  free(base64);

  return (userp == NULL) ? CURLE_OUT_OF_MEMORY : CURLE_OK;
}

void Curl_cleanup_negotiate(struct Curl_easy *data)
{
  Curl_auth_spnego_cleanup(&data->state.negotiate);
  Curl_auth_spnego_cleanup(&data->state.proxyneg);
}

#endif /* !CURL_DISABLE_HTTP && USE_SPNEGO */