2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2008 Doug Rabson
7 * Redistribution and use in source and binary forms, with or without
8 * 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.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <gssapi/gssapi.h>
38 gss_encapsulate_token(const gss_buffer_t input_token, gss_OID oid,
39 gss_buffer_t output_token)
42 size_t len, inside_len;
46 _gss_buffer_zero(output_token);
49 * First time around, we calculate the size, second time, we
53 for (i = 0; i < 2; i++) {
57 * Token starts with [APPLICATION 0] SEQUENCE.
64 * The length embedded in the token is the space
65 * needed for the encapsulated oid plus the length of
68 if (oid->length > 127)
69 return (GSS_S_DEFECTIVE_TOKEN);
71 inside_len = 2 + oid->length + input_token->length;
74 * Figure out how to encode the length
76 if (inside_len < 128) {
82 if (inside_len >= 0x100)
84 if (inside_len >= 0x10000)
86 if (inside_len >= 0x1000000)
91 a = inside_len << 8*(4 - b);
102 * Encode the OID for the mechanism. Simplify life by
103 * assuming that the OID length is less than 128 bytes.
112 memcpy(p, oid->elements, oid->length);
118 memcpy(p, input_token->value, input_token->length);
119 p += input_token->length;
121 len += input_token->length;
124 output_token->length = len;
125 output_token->value = malloc(len);
126 if (!output_token->value)
127 return (GSS_S_DEFECTIVE_TOKEN);
128 p = output_token->value;
132 return (GSS_S_COMPLETE);