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kssl.h
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1 /* ssl/kssl.h -*- mode: C; c-file-style: "eay" -*- */
2 /* Written by Vern Staats <[email protected]> for the OpenSSL project 2000.
3  * project 2000.
4  */
5 /* ====================================================================
6  * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * 2. Redistributions in binary form must reproduce the above copyright
16  * notice, this list of conditions and the following disclaimer in
17  * the documentation and/or other materials provided with the
18  * distribution.
19  *
20  * 3. All advertising materials mentioning features or use of this
21  * software must display the following acknowledgment:
22  * "This product includes software developed by the OpenSSL Project
23  * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24  *
25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26  * endorse or promote products derived from this software without
27  * prior written permission. For written permission, please contact
28  * [email protected].
29  *
30  * 5. Products derived from this software may not be called "OpenSSL"
31  * nor may "OpenSSL" appear in their names without prior written
32  * permission of the OpenSSL Project.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  * acknowledgment:
36  * "This product includes software developed by the OpenSSL Project
37  * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50  * OF THE POSSIBILITY OF SUCH DAMAGE.
51  * ====================================================================
52  *
53  * This product includes cryptographic software written by Eric Young
54  * ([email protected]). This product includes software written by Tim
55  * Hudson ([email protected]).
56  *
57  */
58 
59 /*
60 ** 19990701 VRS Started.
61 */
62 
63 #ifndef KSSL_H
64 #define KSSL_H
65 
66 #include <openssl/opensslconf.h>
67 
68 #ifndef OPENSSL_NO_KRB5
69 
70 #include <stdio.h>
71 #include <ctype.h>
72 #include <krb5.h>
73 
74 #ifdef __cplusplus
75 extern "C" {
76 #endif
77 
78 /*
79 ** Depending on which KRB5 implementation used, some types from
80 ** the other may be missing. Resolve that here and now
81 */
82 #ifdef KRB5_HEIMDAL
83 typedef unsigned char krb5_octet;
84 #define FAR
85 #else
86 
87 #ifndef FAR
88 #define FAR
89 #endif
90 
91 #endif
92 
93 /* Uncomment this to debug kssl problems or
94 ** to trace usage of the Kerberos session key
95 **
96 ** #define KSSL_DEBUG
97 */
98 
99 #ifndef KRB5SVC
100 #define KRB5SVC "host"
101 #endif
102 
103 #ifndef KRB5KEYTAB
104 #define KRB5KEYTAB "/etc/krb5.keytab"
105 #endif
106 
107 #ifndef KRB5SENDAUTH
108 #define KRB5SENDAUTH 1
109 #endif
110 
111 #ifndef KRB5CHECKAUTH
112 #define KRB5CHECKAUTH 1
113 #endif
114 
115 #ifndef KSSL_CLOCKSKEW
116 #define KSSL_CLOCKSKEW 300;
117 #endif
118 
119 #define KSSL_ERR_MAX 255
120 typedef struct kssl_err_st {
121  int reason;
122  char text[KSSL_ERR_MAX+1];
123  } KSSL_ERR;
124 
125 
126 /* Context for passing
127 ** (1) Kerberos session key to SSL, and
128 ** (2) Config data between application and SSL lib
129 */
130 typedef struct kssl_ctx_st
131  {
132  /* used by: disposition: */
133  char *service_name; /* C,S default ok (kssl) */
134  char *service_host; /* C input, REQUIRED */
135  char *client_princ; /* S output from krb5 ticket */
136  char *keytab_file; /* S NULL (/etc/krb5.keytab) */
137  char *cred_cache; /* C NULL (default) */
138  krb5_enctype enctype;
139  int length;
140  krb5_octet FAR *key;
141  } KSSL_CTX;
142 
143 #define KSSL_CLIENT 1
144 #define KSSL_SERVER 2
145 #define KSSL_SERVICE 3
146 #define KSSL_KEYTAB 4
147 
148 #define KSSL_CTX_OK 0
149 #define KSSL_CTX_ERR 1
150 #define KSSL_NOMEM 2
151 
152 /* Public (for use by applications that use OpenSSL with Kerberos 5 support */
153 krb5_error_code kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text);
154 KSSL_CTX *kssl_ctx_new(void);
155 KSSL_CTX *kssl_ctx_free(KSSL_CTX *kssl_ctx);
156 void kssl_ctx_show(KSSL_CTX *kssl_ctx);
157 krb5_error_code kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
158  krb5_data *realm, krb5_data *entity, int nentities);
159 krb5_error_code kssl_cget_tkt(KSSL_CTX *kssl_ctx, krb5_data **enc_tktp,
160  krb5_data *authenp, KSSL_ERR *kssl_err);
161 krb5_error_code kssl_sget_tkt(KSSL_CTX *kssl_ctx, krb5_data *indata,
162  krb5_ticket_times *ttimes, KSSL_ERR *kssl_err);
163 krb5_error_code kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session);
164 void kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text);
165 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data);
166 krb5_error_code kssl_build_principal_2(krb5_context context,
167  krb5_principal *princ, int rlen, const char *realm,
168  int slen, const char *svc, int hlen, const char *host);
169 krb5_error_code kssl_validate_times(krb5_timestamp atime,
170  krb5_ticket_times *ttimes);
171 krb5_error_code kssl_check_authent(KSSL_CTX *kssl_ctx, krb5_data *authentp,
172  krb5_timestamp *atimep, KSSL_ERR *kssl_err);
173 unsigned char *kssl_skip_confound(krb5_enctype enctype, unsigned char *authn);
174 
175 void SSL_set0_kssl_ctx(SSL *s, KSSL_CTX *kctx);
176 KSSL_CTX * SSL_get0_kssl_ctx(SSL *s);
177 char *kssl_ctx_get0_client_princ(KSSL_CTX *kctx);
178 
179 #ifdef __cplusplus
180 }
181 #endif
182 #endif /* OPENSSL_NO_KRB5 */
183 #endif /* KSSL_H */
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