e45c9d4db4
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2000 ec53bebd-3082-4978-b11e-865c3cabbd6b
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
#include "rsh_locl.h"
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RCSID("$Id$");
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ssize_t
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do_read (int fd,
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void *buf,
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size_t sz)
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{
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int ret;
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if (do_encrypt) {
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if (auth_method == AUTH_KRB4) {
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return des_enc_read (fd, buf, sz, schedule, &iv);
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} else if(auth_method == AUTH_KRB5) {
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u_int32_t len, outer_len;
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int status;
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krb5_data data;
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ret = krb5_net_read (context, fd, &len, 4);
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if (ret != 4)
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return ret;
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len = ntohl(len);
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outer_len = len + 12;
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outer_len = (outer_len + 7) & ~7;
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if (outer_len > sz)
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abort ();
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ret = krb5_net_read (context, fd, buf, outer_len);
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if (ret != outer_len)
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return ret;
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status = krb5_decrypt(context, buf, outer_len,
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ETYPE_DES_CBC_CRC, /* XXX */
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keyblock, &data);
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if (status != KSUCCESS)
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errx (1, "%s", krb5_get_err_text (context, status));
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memcpy (buf, data.data, len);
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free (data.data);
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return len;
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} else {
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abort ();
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}
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} else
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return read (fd, buf, sz);
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}
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ssize_t
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do_write (int fd, void *buf, size_t sz)
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{
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int ret;
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if (do_encrypt) {
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if(auth_method == AUTH_KRB4) {
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return des_enc_write (fd, buf, sz, schedule, &iv);
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} else if(auth_method == AUTH_KRB5) {
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krb5_error_code status;
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krb5_data data;
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u_int32_t len;
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int ret;
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status = krb5_encrypt (context,
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buf,
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sz,
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ETYPE_DES_CBC_CRC, /* XXX */
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keyblock,
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&data);
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if (status != KSUCCESS)
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errx (1, "%s", krb5_get_err_text(context, status));
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len = htonl(sz);
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ret = krb5_net_write (context, fd, &len, 4);
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if (ret != 4)
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return ret;
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ret = krb5_net_write (context, fd, data.data, data.length);
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if (ret != data.length)
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return ret;
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free (data.data);
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return sz;
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} else {
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abort();
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}
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} else
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return write (fd, buf, sz);
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}
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