diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/mk_rep.c')
-rw-r--r-- | crypto/heimdal/lib/krb5/mk_rep.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/mk_rep.c b/crypto/heimdal/lib/krb5/mk_rep.c new file mode 100644 index 0000000..060be03 --- /dev/null +++ b/crypto/heimdal/lib/krb5/mk_rep.c @@ -0,0 +1,116 @@ +/* + * 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 <krb5_locl.h> + +RCSID("$Id: mk_rep.c,v 1.16 1999/12/02 17:05:11 joda Exp $"); + +krb5_error_code +krb5_mk_rep(krb5_context context, + krb5_auth_context *auth_context, + krb5_data *outbuf) +{ + krb5_error_code ret; + AP_REP ap; + EncAPRepPart body; + u_char *buf = NULL; + size_t buf_size; + size_t len; + krb5_crypto crypto; + + ap.pvno = 5; + ap.msg_type = krb_ap_rep; + + memset (&body, 0, sizeof(body)); + + body.ctime = (*auth_context)->authenticator->ctime; + body.cusec = (*auth_context)->authenticator->cusec; + body.subkey = NULL; + if ((*auth_context)->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { + krb5_generate_seq_number (context, + (*auth_context)->keyblock, + &(*auth_context)->local_seqnumber); + body.seq_number = malloc (sizeof(*body.seq_number)); + if (body.seq_number == NULL) + return ENOMEM; + *(body.seq_number) = (*auth_context)->local_seqnumber; + } else + body.seq_number = NULL; + + ap.enc_part.etype = (*auth_context)->keyblock->keytype; + ap.enc_part.kvno = NULL; + + buf_size = length_EncAPRepPart(&body); + buf = malloc (buf_size); + if (buf == NULL) { + free_EncAPRepPart (&body); + return ENOMEM; + } + + ret = krb5_encode_EncAPRepPart (context, + buf + buf_size - 1, + buf_size, + &body, + &len); + + free_EncAPRepPart (&body); + krb5_crypto_init(context, (*auth_context)->keyblock, + 0 /* ap.enc_part.etype */, &crypto); + ret = krb5_encrypt (context, + crypto, + KRB5_KU_AP_REQ_ENC_PART, + buf + buf_size - len, + len, + &ap.enc_part.cipher); + krb5_crypto_destroy(context, crypto); + if (ret) { + free(buf); + return ret; + } + + buf_size = length_AP_REP(&ap); + buf = realloc(buf, buf_size); + if(buf == NULL) { + free_AP_REP (&ap); + return ENOMEM; + } + ret = encode_AP_REP (buf + buf_size - 1, buf_size, &ap, &len); + + free_AP_REP (&ap); + + if(len != buf_size) + krb5_abortx(context, "krb5_mk_rep: encoded length != calculated length"); + outbuf->data = buf; + outbuf->length = len; + return 0; +} |