09a0a27f70
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7821 ec53bebd-3082-4978-b11e-865c3cabbd6b
116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
/*
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* Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "gssapi_locl.h"
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RCSID("$Id$");
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OM_uint32 gss_get_mic
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(OM_uint32 * minor_status,
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const gss_ctx_id_t context_handle,
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gss_qop_t qop_req,
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const gss_buffer_t message_buffer,
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gss_buffer_t message_token
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)
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{
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u_char *p;
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MD5_CTX md5;
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u_char hash[16];
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des_key_schedule schedule;
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des_cblock key;
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des_cblock zero;
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int32_t seq_number;
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size_t len, total_len;
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gssapi_krb5_encap_length (22, &len, &total_len);
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message_token->length = total_len;
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message_token->value = malloc (total_len);
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if (message_token->value == NULL)
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return GSS_S_FAILURE;
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p = gssapi_krb5_make_header(message_token->value,
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len,
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"\x01\x01");
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memcpy (p, "\x00\x00", 2);
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p += 2;
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memcpy (p, "\xff\xff\xff\xff", 4);
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p += 4;
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/* Fill in later */
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memset (p, 0, 16);
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p += 16;
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/* checksum */
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MD5Init (&md5);
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MD5Update (&md5, p - 24, 8);
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MD5Update (&md5, message_buffer->value,
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message_buffer->length);
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MD5Final (hash, &md5);
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memset (&zero, 0, sizeof(zero));
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gss_krb5_getsomekey(context_handle, &key);
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des_set_key (&key, schedule);
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des_cbc_cksum ((const void *)hash, (void *)hash, sizeof(hash),
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schedule, &zero);
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memcpy (p - 8, hash, 8);
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/* sequence number */
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krb5_auth_getlocalseqnumber (gssapi_krb5_context,
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context_handle->auth_context,
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&seq_number);
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p -= 16;
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p[0] = (seq_number >> 0) & 0xFF;
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p[1] = (seq_number >> 8) & 0xFF;
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p[2] = (seq_number >> 16) & 0xFF;
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p[3] = (seq_number >> 24) & 0xFF;
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memset (p + 4,
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(context_handle->more_flags & LOCAL) ? 0 : 0xFF,
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4);
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des_set_key (&key, schedule);
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des_cbc_encrypt ((const void *)p, (void *)p, 8,
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schedule, (des_cblock *)(p + 8), DES_ENCRYPT);
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krb5_auth_setlocalseqnumber (gssapi_krb5_context,
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context_handle->auth_context,
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++seq_number);
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memset (key, 0, sizeof(key));
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memset (schedule, 0, sizeof(schedule));
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return GSS_S_COMPLETE;
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}
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