diff options
Diffstat (limited to 'crypto/heimdal/appl/rsh/common.c')
| -rw-r--r-- | crypto/heimdal/appl/rsh/common.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/crypto/heimdal/appl/rsh/common.c b/crypto/heimdal/appl/rsh/common.c new file mode 100644 index 0000000..6614137 --- /dev/null +++ b/crypto/heimdal/appl/rsh/common.c @@ -0,0 +1,124 @@ +/* + * Copyright (c) 1997 - 1999 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "rsh_locl.h" +RCSID("$Id: common.c,v 1.12 1999/12/02 17:04:56 joda Exp $"); + +ssize_t +do_read (int fd, + void *buf, + size_t sz) +{ + int ret; + + if (do_encrypt) { +#ifdef KRB4 + if (auth_method == AUTH_KRB4) { + return des_enc_read (fd, buf, sz, schedule, &iv); + } else +#endif /* KRB4 */ + if(auth_method == AUTH_KRB5) { + u_int32_t len, outer_len; + int status; + krb5_data data; + void *edata; + + ret = krb5_net_read (context, &fd, &len, 4); + if (ret <= 0) + return ret; + len = ntohl(len); + if (len > sz) + abort (); + outer_len = krb5_get_wrapped_length (context, crypto, len); + edata = malloc (outer_len); + if (edata == NULL) + errx (1, "malloc: cannot allocate %u bytes", outer_len); + ret = krb5_net_read (context, &fd, edata, outer_len); + if (ret <= 0) + return ret; + + status = krb5_decrypt(context, crypto, KRB5_KU_OTHER_ENCRYPTED, + edata, outer_len, &data); + free (edata); + + if (status) + errx (1, "%s", krb5_get_err_text (context, status)); + memcpy (buf, data.data, len); + krb5_data_free (&data); + return len; + } else { + abort (); + } + } else + return read (fd, buf, sz); +} + +ssize_t +do_write (int fd, void *buf, size_t sz) +{ + if (do_encrypt) { +#ifdef KRB4 + if(auth_method == AUTH_KRB4) { + return des_enc_write (fd, buf, sz, schedule, &iv); + } else +#endif /* KRB4 */ + if(auth_method == AUTH_KRB5) { + krb5_error_code status; + krb5_data data; + u_int32_t len; + int ret; + + status = krb5_encrypt(context, crypto, KRB5_KU_OTHER_ENCRYPTED, + buf, sz, &data); + + if (status) + errx (1, "%s", krb5_get_err_text(context, status)); + + assert (krb5_get_wrapped_length (context, crypto, + sz) == data.length); + + len = htonl(sz); + ret = krb5_net_write (context, &fd, &len, 4); + if (ret != 4) + return ret; + ret = krb5_net_write (context, &fd, data.data, data.length); + if (ret != data.length) + return ret; + free (data.data); + return sz; + } else { + abort(); + } + } else + return write (fd, buf, sz); +} |
