2 * Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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
46 init_ivecs(int client
, int have_errsock
)
50 krb5_crypto_getblocksize(context
, crypto
, &blocksize
);
52 ivec_in
[0] = malloc(blocksize
);
53 memset(ivec_in
[0], client
, blocksize
);
56 ivec_in
[1] = malloc(blocksize
);
57 memset(ivec_in
[1], 2 | client
, blocksize
);
59 ivec_in
[1] = ivec_in
[0];
61 ivec_out
[0] = malloc(blocksize
);
62 memset(ivec_out
[0], !client
, blocksize
);
65 ivec_out
[1] = malloc(blocksize
);
66 memset(ivec_out
[1], 2 | !client
, blocksize
);
68 ivec_out
[1] = ivec_out
[0];
74 do_read (int fd
, void *buf
, size_t sz
, void *ivec
)
78 if(auth_method
== AUTH_KRB5
) {
80 uint32_t len
, outer_len
;
85 ret
= krb5_net_read (context
, &fd
, &len
, 4);
91 /* ivec will be non null for protocol version 2 */
93 outer_len
= krb5_get_wrapped_length (context
, crypto
, len
+ 4);
95 outer_len
= krb5_get_wrapped_length (context
, crypto
, len
);
96 edata
= malloc (outer_len
);
98 errx (1, "malloc: cannot allocate %u bytes", outer_len
);
99 ret
= krb5_net_read (context
, &fd
, edata
, outer_len
);
105 status
= krb5_decrypt_ivec(context
, crypto
, key_usage
,
106 edata
, outer_len
, &data
, ivec
);
110 krb5_err (context
, 1, status
, "decrypting data");
113 if(data
.length
< len
+ 4)
114 errx (1, "data received is too short");
115 _krb5_get_int(data
.data
, &l
, 4);
117 errx (1, "inconsistency in received data");
118 memcpy (buf
, (unsigned char *)data
.data
+4, len
);
120 memcpy (buf
, data
.data
, len
);
121 krb5_data_free (&data
);
127 return read (fd
, buf
, sz
);
131 do_write (int fd
, void *buf
, size_t sz
, void *ivec
)
135 if(auth_method
== AUTH_KRB5
) {
136 krb5_error_code status
;
138 unsigned char len
[4];
141 _krb5_put_int(len
, sz
, 4);
143 unsigned char *tmp
= malloc(sz
+ 4);
146 _krb5_put_int(tmp
, sz
, 4);
147 memcpy(tmp
+ 4, buf
, sz
);
148 status
= krb5_encrypt_ivec(context
, crypto
, key_usage
,
149 tmp
, sz
+ 4, &data
, ivec
);
152 status
= krb5_encrypt_ivec(context
, crypto
, key_usage
,
153 buf
, sz
, &data
, ivec
);
156 krb5_err(context
, 1, status
, "encrypting data");
158 ret
= krb5_net_write (context
, &fd
, len
, 4);
161 ret
= krb5_net_write (context
, &fd
, data
.data
, data
.length
);
162 if (ret
!= data
.length
)
170 return write (fd
, buf
, sz
);