s4:librpc/rpc: don't do async requests if gensec doesn't support async replies (bug...
[Samba/gebeck_regimport.git] / source4 / heimdal / lib / krb5 / build_auth.c
blob01145a28c604920de7ddc07483a669b9b061b6c2
1 /*
2 * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
34 #include "krb5_locl.h"
36 static krb5_error_code
37 make_etypelist(krb5_context context,
38 krb5_authdata **auth_data)
40 EtypeList etypes;
41 krb5_error_code ret;
42 krb5_authdata ad;
43 u_char *buf;
44 size_t len = 0;
45 size_t buf_size;
47 ret = _krb5_init_etype(context, KRB5_PDU_NONE,
48 &etypes.len, &etypes.val,
49 NULL);
50 if (ret)
51 return ret;
53 ASN1_MALLOC_ENCODE(EtypeList, buf, buf_size, &etypes, &len, ret);
54 if (ret) {
55 free_EtypeList(&etypes);
56 return ret;
58 if(buf_size != len)
59 krb5_abortx(context, "internal error in ASN.1 encoder");
60 free_EtypeList(&etypes);
62 ALLOC_SEQ(&ad, 1);
63 if (ad.val == NULL) {
64 free(buf);
65 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
66 return ENOMEM;
69 ad.val[0].ad_type = KRB5_AUTHDATA_GSS_API_ETYPE_NEGOTIATION;
70 ad.val[0].ad_data.length = len;
71 ad.val[0].ad_data.data = buf;
73 ASN1_MALLOC_ENCODE(AD_IF_RELEVANT, buf, buf_size, &ad, &len, ret);
74 if (ret) {
75 free_AuthorizationData(&ad);
76 return ret;
78 if(buf_size != len)
79 krb5_abortx(context, "internal error in ASN.1 encoder");
80 free_AuthorizationData(&ad);
82 ALLOC(*auth_data, 1);
83 if (*auth_data == NULL) {
84 free(buf);
85 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
86 return ENOMEM;
89 ALLOC_SEQ(*auth_data, 1);
90 if ((*auth_data)->val == NULL) {
91 free(*auth_data);
92 free(buf);
93 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
94 return ENOMEM;
97 (*auth_data)->val[0].ad_type = KRB5_AUTHDATA_IF_RELEVANT;
98 (*auth_data)->val[0].ad_data.length = len;
99 (*auth_data)->val[0].ad_data.data = buf;
101 return 0;
104 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
105 _krb5_build_authenticator (krb5_context context,
106 krb5_auth_context auth_context,
107 krb5_enctype enctype,
108 krb5_creds *cred,
109 Checksum *cksum,
110 krb5_data *result,
111 krb5_key_usage usage)
113 Authenticator auth;
114 u_char *buf = NULL;
115 size_t buf_size;
116 size_t len = 0;
117 krb5_error_code ret;
118 krb5_crypto crypto;
120 memset(&auth, 0, sizeof(auth));
122 auth.authenticator_vno = 5;
123 copy_Realm(&cred->client->realm, &auth.crealm);
124 copy_PrincipalName(&cred->client->name, &auth.cname);
126 krb5_us_timeofday (context, &auth.ctime, &auth.cusec);
128 ret = krb5_auth_con_getlocalsubkey(context, auth_context, &auth.subkey);
129 if(ret)
130 goto fail;
132 if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
133 if(auth_context->local_seqnumber == 0)
134 krb5_generate_seq_number (context,
135 &cred->session,
136 &auth_context->local_seqnumber);
137 ALLOC(auth.seq_number, 1);
138 if(auth.seq_number == NULL) {
139 ret = ENOMEM;
140 goto fail;
142 *auth.seq_number = auth_context->local_seqnumber;
143 } else
144 auth.seq_number = NULL;
145 auth.authorization_data = NULL;
147 if (cksum) {
148 ALLOC(auth.cksum, 1);
149 if (auth.cksum == NULL) {
150 ret = ENOMEM;
151 goto fail;
153 ret = copy_Checksum(cksum, auth.cksum);
154 if (ret)
155 goto fail;
157 if (auth.cksum->cksumtype == CKSUMTYPE_GSSAPI) {
159 * This is not GSS-API specific, we only enable it for
160 * GSS for now
162 ret = make_etypelist(context, &auth.authorization_data);
163 if (ret)
164 goto fail;
168 /* XXX - Copy more to auth_context? */
170 auth_context->authenticator->ctime = auth.ctime;
171 auth_context->authenticator->cusec = auth.cusec;
173 ASN1_MALLOC_ENCODE(Authenticator, buf, buf_size, &auth, &len, ret);
174 if (ret)
175 goto fail;
176 if(buf_size != len)
177 krb5_abortx(context, "internal error in ASN.1 encoder");
179 ret = krb5_crypto_init(context, &cred->session, enctype, &crypto);
180 if (ret)
181 goto fail;
182 ret = krb5_encrypt (context,
183 crypto,
184 usage /* KRB5_KU_AP_REQ_AUTH */,
185 buf,
186 len,
187 result);
188 krb5_crypto_destroy(context, crypto);
190 if (ret)
191 goto fail;
193 fail:
194 free_Authenticator (&auth);
195 free (buf);
197 return ret;