135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* This file is part of the Project Athena Zephyr Notification System.
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* It contains source for the ZFormatAuthenticNotice function.
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*
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* Created by: Robert French
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*
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* $Id$
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*
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* Copyright (c) 1987,1988 by the Massachusetts Institute of Technology.
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* For copying and distribution information, see the file
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* "mit-copyright.h".
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*/
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#ifndef lint
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static const char rcsid_ZFormatAuthenticNotice_c[] = "$Id$";
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#endif
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#include <internal.h>
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#ifdef HAVE_KRB4
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Code_t
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ZFormatAuthenticNotice(ZNotice_t *notice,
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char *buffer,
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int buffer_len,
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int *len,
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C_Block session)
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{
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ZNotice_t newnotice;
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char *ptr;
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int retval, hdrlen;
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newnotice = *notice;
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newnotice.z_auth = 1;
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newnotice.z_authent_len = 0;
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newnotice.z_ascii_authent = "";
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if ((retval = Z_FormatRawHeader(&newnotice, buffer, buffer_len,
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&hdrlen, &ptr, NULL)) != ZERR_NONE)
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return (retval);
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newnotice.z_checksum =
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(ZChecksum_t)des_quad_cksum((void *)buffer, NULL, ptr - buffer, 0, (C_Block *)session);
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if ((retval = Z_FormatRawHeader(&newnotice, buffer, buffer_len,
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&hdrlen, NULL, NULL)) != ZERR_NONE)
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return (retval);
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ptr = buffer+hdrlen;
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if (newnotice.z_message_len+hdrlen > buffer_len)
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return (ZERR_PKTLEN);
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(void) memcpy(ptr, newnotice.z_message, newnotice.z_message_len);
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*len = hdrlen+newnotice.z_message_len;
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if (*len > Z_MAXPKTLEN)
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return (ZERR_PKTLEN);
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return (ZERR_NONE);
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}
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#endif
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#ifdef HAVE_KRB5
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Code_t
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ZFormatAuthenticNoticeV5(ZNotice_t *notice,
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register char *buffer,
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register int buffer_len,
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int *len,
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krb5_keyblock *keyblock)
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{
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ZNotice_t newnotice;
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char *ptr;
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int retval, hdrlen, hdr_adj;
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krb5_enctype enctype;
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krb5_cksumtype cksumtype;
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#ifdef HAVE_KRB4
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int key_len;
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#endif
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char *cksum_start, *cstart, *cend;
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int cksum_len;
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#ifdef HAVE_KRB4
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key_len = Z_keylen(keyblock);
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#endif
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retval = Z_ExtractEncCksum(keyblock, &enctype, &cksumtype);
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if (retval)
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return (ZAUTH_FAILED);
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#ifdef HAVE_KRB4
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if (key_len == 8 && (enctype == (krb5_enctype)ENCTYPE_DES_CBC_CRC ||
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enctype == (krb5_enctype)ENCTYPE_DES_CBC_MD4 ||
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enctype == (krb5_enctype)ENCTYPE_DES_CBC_MD5)) {
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C_Block tmp;
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memcpy(&tmp, Z_keydata(keyblock), key_len);
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return ZFormatAuthenticNotice(notice, buffer, buffer_len, len,
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tmp);
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}
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#endif
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newnotice = *notice;
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newnotice.z_auth = 1;
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newnotice.z_authent_len = 0;
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newnotice.z_ascii_authent = "";
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if ((retval = Z_NewFormatRawHeader(&newnotice, buffer, buffer_len,
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&hdrlen,
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&cksum_start, &cksum_len, &cstart,
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&cend)) != ZERR_NONE)
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return (retval);
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/* we know this is only called by the server */
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retval = Z_InsertZcodeChecksum(keyblock, &newnotice, buffer,
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cksum_start, cksum_len, cstart, cend,
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buffer_len, &hdr_adj, 1);
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if (retval)
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return retval;
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hdrlen += hdr_adj;
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ptr = buffer+hdrlen;
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if (newnotice.z_message_len+hdrlen > buffer_len)
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return (ZERR_PKTLEN);
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(void) memcpy(ptr, newnotice.z_message, newnotice.z_message_len);
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*len = hdrlen+newnotice.z_message_len;
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if (*len > Z_MAXPKTLEN)
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return (ZERR_PKTLEN);
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return (ZERR_NONE);
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}
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#endif
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