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1 /***************************************************************************
2  *                                  _   _ ____  _
3  *  Project                     ___| | | |  _ \| |
4  *                             / __| | | | |_) | |
5  *                            | (__| |_| |  _ <| |___
6  *                             \___|\___/|_| \_\_____|
7  *
8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
9  *
10  * This software is licensed as described in the file COPYING, which
11  * you should have received as part of this distribution. The terms
12  * are also available at https://curl.haxx.se/docs/copyright.html.
13  *
14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15  * copies of the Software, and permit persons to whom the Software is
16  * furnished to do so, under the terms of the COPYING file.
17  *
18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19  * KIND, either express or implied.
20  *
21  * RFC4616 PLAIN authentication
22  * Draft   LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>
23  *
24  ***************************************************************************/
25 
26 #include "curl_setup.h"
27 
28 #include <curl/curl.h>
29 #include "urldata.h"
30 
31 #include "vauth/vauth.h"
32 #include "curl_base64.h"
33 #include "curl_md5.h"
34 #include "warnless.h"
35 #include "strtok.h"
36 #include "strequal.h"
37 #include "rawstr.h"
38 #include "sendf.h"
39 #include "curl_printf.h"
40 
41 /* The last #include files should be: */
42 #include "curl_memory.h"
43 #include "memdebug.h"
44 
45 /*
46  * Curl_auth_create_plain_message()
47  *
48  * This is used to generate an already encoded PLAIN message ready
49  * for sending to the recipient.
50  *
51  * Parameters:
52  *
53  * data    [in]     - The session handle.
54  * userp   [in]     - The user name.
55  * passdwp [in]     - The user's password.
56  * outptr  [in/out] - The address where a pointer to newly allocated memory
57  *                    holding the result will be stored upon completion.
58  * outlen  [out]    - The length of the output message.
59  *
60  * Returns CURLE_OK on success.
61  */
Curl_auth_create_plain_message(struct Curl_easy * data,const char * userp,const char * passwdp,char ** outptr,size_t * outlen)62 CURLcode Curl_auth_create_plain_message(struct Curl_easy *data,
63                                         const char *userp,
64                                         const char *passwdp,
65                                         char **outptr, size_t *outlen)
66 {
67   CURLcode result;
68   char *plainauth;
69   size_t ulen;
70   size_t plen;
71 
72   ulen = strlen(userp);
73   plen = strlen(passwdp);
74 
75   plainauth = malloc(2 * ulen + plen + 2);
76   if(!plainauth) {
77     *outlen = 0;
78     *outptr = NULL;
79     return CURLE_OUT_OF_MEMORY;
80   }
81 
82   /* Calculate the reply */
83   memcpy(plainauth, userp, ulen);
84   plainauth[ulen] = '\0';
85   memcpy(plainauth + ulen + 1, userp, ulen);
86   plainauth[2 * ulen + 1] = '\0';
87   memcpy(plainauth + 2 * ulen + 2, passwdp, plen);
88 
89   /* Base64 encode the reply */
90   result = Curl_base64_encode(data, plainauth, 2 * ulen + plen + 2, outptr,
91                               outlen);
92   free(plainauth);
93 
94   return result;
95 }
96 
97 /*
98  * Curl_auth_create_login_message()
99  *
100  * This is used to generate an already encoded LOGIN message containing the
101  * user name or password ready for sending to the recipient.
102  *
103  * Parameters:
104  *
105  * data    [in]     - The session handle.
106  * valuep  [in]     - The user name or user's password.
107  * outptr  [in/out] - The address where a pointer to newly allocated memory
108  *                    holding the result will be stored upon completion.
109  * outlen  [out]    - The length of the output message.
110  *
111  * Returns CURLE_OK on success.
112  */
Curl_auth_create_login_message(struct Curl_easy * data,const char * valuep,char ** outptr,size_t * outlen)113 CURLcode Curl_auth_create_login_message(struct Curl_easy *data,
114                                         const char *valuep, char **outptr,
115                                         size_t *outlen)
116 {
117   size_t vlen = strlen(valuep);
118 
119   if(!vlen) {
120     /* Calculate an empty reply */
121     *outptr = strdup("=");
122     if(*outptr) {
123       *outlen = (size_t) 1;
124       return CURLE_OK;
125     }
126 
127     *outlen = 0;
128     return CURLE_OUT_OF_MEMORY;
129   }
130 
131   /* Base64 encode the value */
132   return Curl_base64_encode(data, valuep, vlen, outptr, outlen);
133 }
134 
135 /*
136  * Curl_auth_create_external_message()
137  *
138  * This is used to generate an already encoded EXTERNAL message containing
139  * the user name ready for sending to the recipient.
140  *
141  * Parameters:
142  *
143  * data    [in]     - The session handle.
144  * user    [in]     - The user name.
145  * outptr  [in/out] - The address where a pointer to newly allocated memory
146  *                    holding the result will be stored upon completion.
147  * outlen  [out]    - The length of the output message.
148  *
149  * Returns CURLE_OK on success.
150  */
Curl_auth_create_external_message(struct Curl_easy * data,const char * user,char ** outptr,size_t * outlen)151 CURLcode Curl_auth_create_external_message(struct Curl_easy *data,
152                                            const char *user, char **outptr,
153                                            size_t *outlen)
154 {
155   /* This is the same formatting as the login message */
156   return Curl_auth_create_login_message(data, user, outptr, outlen);
157 }
158