diff options
Diffstat (limited to 'third_party/heimdal/lib/krb5/mk_rep.c')
| -rw-r--r-- | third_party/heimdal/lib/krb5/mk_rep.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/mk_rep.c b/third_party/heimdal/lib/krb5/mk_rep.c new file mode 100644 index 0000000..bd24c6e --- /dev/null +++ b/third_party/heimdal/lib/krb5/mk_rep.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 1997 - 2003 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" + +KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL +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 = 0; + 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; + if (auth_context->flags & KRB5_AUTH_CONTEXT_USE_SUBKEY) { + if (auth_context->local_subkey == NULL) { + ret = krb5_auth_con_generatelocalsubkey(context, + auth_context, + auth_context->keyblock); + if(ret) { + free_EncAPRepPart(&body); + return ret; + } + } + ret = krb5_copy_keyblock(context, auth_context->local_subkey, + &body.subkey); + if (ret) { + free_EncAPRepPart(&body); + return krb5_enomem(context); + } + } else + body.subkey = NULL; + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { + if(auth_context->local_seqnumber == 0) + krb5_generate_seq_number (context, + auth_context->keyblock, + &auth_context->local_seqnumber); + ALLOC(body.seq_number, 1); + if (body.seq_number == NULL) { + free_EncAPRepPart(&body); + return krb5_enomem(context); + } + *(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; + + ASN1_MALLOC_ENCODE(EncAPRepPart, buf, buf_size, &body, &len, ret); + free_EncAPRepPart (&body); + if(ret) + return ret; + if (buf_size != len) + krb5_abortx(context, "internal error in ASN.1 encoder"); + ret = krb5_crypto_init(context, auth_context->keyblock, + 0 /* ap.enc_part.etype */, &crypto); + if (ret) { + free (buf); + return ret; + } + 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); + free(buf); + if (ret) + return ret; + + ASN1_MALLOC_ENCODE(AP_REP, outbuf->data, outbuf->length, &ap, &len, ret); + if (ret == 0 && outbuf->length != len) + krb5_abortx(context, "internal error in ASN.1 encoder"); + free_AP_REP (&ap); + return ret; +} |