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1 | /* $Id: authsasl.c,v 1.5 2008/07/10 02:43:55 mrsam Exp $ */ |
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2 | |
3 | /* |
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4 | ** Copyright 1998 - 2008 Double Precision, Inc. See COPYING for |
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5 | ** distribution information. |
6 | */ |
7 | |
8 | #include "courier_auth_config.h" |
9 | #include "courierauthsasl.h" |
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10 | #include "authsaslclient.h" |
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11 | #include <stdlib.h> |
12 | #include <ctype.h> |
13 | #include <string.h> |
14 | #include <errno.h> |
15 | |
16 | /* Use the SASL_LIST macro to build authsasl_list */ |
17 | |
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18 | #define NO_SERVER_FUNC() |
19 | |
20 | #define SERVER_FUNC(b) int b(const char *, const char *, \ |
21 | char *(*)(const char *, void *), \ |
22 | void *, \ |
23 | char **, \ |
24 | char **); |
25 | |
26 | #define SASL(a,b,c) b |
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27 | SASL_LIST |
28 | |
29 | #undef SASL |
30 | |
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31 | #undef SERVER_FUNC |
32 | #define SERVER_FUNC(n) n |
33 | |
34 | #undef NO_SERVER_FUNC |
35 | #define NO_SERVER_FUNC() 0 |
36 | |
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37 | #define SASL(a,b,c) {a, b}, |
38 | |
39 | struct authsasl_info authsasl_list[] = { |
40 | |
41 | SASL_LIST |
42 | |
43 | { 0, 0}}; |
44 | |
45 | int auth_sasl(const char *method, |
46 | const char *initreply, |
47 | char *(*callback_func)(const char *, void *), |
48 | void *callback_arg, |
49 | char **authtype_ptr, /* Returned - AUTHTYPE */ |
50 | char **authdata_ptr) |
51 | { |
52 | int i; |
53 | char *p, *q; |
54 | |
55 | if ((p=malloc(strlen(method)+1)) == 0) |
56 | return (0); |
57 | strcpy(p, method); |
58 | for (q=p; *q; q++) |
59 | *q=toupper((int)(unsigned char)*q); |
60 | |
61 | for (i=0; authsasl_list[i].sasl_method; i++) |
62 | { |
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63 | if (strcmp(p, authsasl_list[i].sasl_method) == 0 && |
64 | authsasl_list[i].sasl_func) |
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65 | { |
66 | free(p); |
67 | return ( (*authsasl_list[i].sasl_func) |
68 | (method, |
69 | initreply, callback_func, |
70 | callback_arg, |
71 | authtype_ptr, authdata_ptr)); |
72 | } |
73 | } |
74 | free(p); |
75 | errno=ENOENT; |
76 | return (AUTHSASL_ERROR); |
77 | } |
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78 | |
79 | int auth_sasl_ex(const char *method, |
80 | const char *initresponse, |
81 | const char *externalauth, |
82 | char *(*callback_func)(const char *, void *), |
83 | void *callback_arg, |
84 | char **authtype_ptr, /* Returned - AUTHTYPE */ |
85 | char **authdata_ptr) |
86 | { |
87 | char *uid; |
88 | int n; |
89 | |
90 | if (strcmp(method, "EXTERNAL")) |
91 | return auth_sasl(method, initresponse, callback_func, |
92 | callback_arg, |
93 | authtype_ptr, |
94 | authdata_ptr); |
95 | |
96 | if (initresponse && *initresponse) |
97 | return AUTHSASL_ERROR; |
98 | |
99 | if (!externalauth || !*externalauth) |
100 | return AUTHSASL_ERROR; |
101 | |
102 | if (!initresponse) |
103 | { |
104 | uid=callback_func("", callback_arg); |
105 | |
106 | if (*uid == '*') |
107 | { |
108 | free(uid); |
109 | return (AUTHSASL_ABORTED); |
110 | } |
111 | |
112 | n=authsasl_frombase64(uid); |
113 | |
114 | if (n < 0) |
115 | { |
116 | free(uid); |
117 | return AUTHSASL_ABORTED; |
118 | } |
119 | uid[n]=0; |
120 | |
121 | if (uid[0]) |
122 | { |
123 | free(uid); |
124 | return AUTHSASL_ABORTED; |
125 | } |
126 | free(uid); |
127 | } |
128 | |
129 | if ((*authtype_ptr=strdup("EXTERNAL")) == NULL) |
130 | return AUTHSASL_ABORTED; |
131 | |
132 | if ((*authdata_ptr=strdup(externalauth)) == NULL) |
133 | { |
134 | free(authtype_ptr); |
135 | return AUTHSASL_ABORTED; |
136 | } |
137 | |
138 | return 0; |
139 | } |