diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/mk_priv.c')
| -rw-r--r-- | crypto/heimdal/lib/krb5/mk_priv.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/mk_priv.c b/crypto/heimdal/lib/krb5/mk_priv.c new file mode 100644 index 0000000..1ee2bed --- /dev/null +++ b/crypto/heimdal/lib/krb5/mk_priv.c @@ -0,0 +1,168 @@ +/* + * Copyright (c) 1997, 1998, 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_priv.c,v 1.25 1999/12/02 17:05:11 joda Exp $"); + +/* + * + */ + +krb5_error_code +krb5_mk_priv(krb5_context context, + krb5_auth_context auth_context, + const krb5_data *userdata, + krb5_data *outbuf, + /*krb5_replay_data*/ void *outdata) +{ + krb5_error_code ret; + KRB_PRIV s; + EncKrbPrivPart part; + u_char *buf; + size_t buf_size; + size_t len; + int tmp_seq; + krb5_keyblock *key; + int32_t sec, usec; + KerberosTime sec2; + int usec2; + krb5_crypto crypto; + + /* XXX - Is this right? */ + + if (auth_context->local_subkey) + key = auth_context->local_subkey; + else if (auth_context->remote_subkey) + key = auth_context->remote_subkey; + else + key = auth_context->keyblock; + + krb5_us_timeofday (context, &sec, &usec); + + part.user_data = *userdata; + sec2 = sec; + part.timestamp = &sec2; + usec2 = usec; + part.usec = &usec2; + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { + tmp_seq = ++auth_context->local_seqnumber; + part.seq_number = &tmp_seq; + } else { + part.seq_number = NULL; + } + + part.s_address = auth_context->local_address; + part.r_address = auth_context->remote_address; + + buf_size = 1024; + buf = malloc (buf_size); + if (buf == NULL) + return ENOMEM; + + krb5_data_zero (&s.enc_part.cipher); + + do { + ret = encode_EncKrbPrivPart (buf + buf_size - 1, buf_size, + &part, &len); + if (ret) { + if (ret == ASN1_OVERFLOW) { + u_char *tmp; + + buf_size *= 2; + tmp = realloc (buf, buf_size); + if (tmp == NULL) { + ret = ENOMEM; + goto fail; + } + buf = tmp; + } else { + goto fail; + } + } + } while(ret == ASN1_OVERFLOW); + + s.pvno = 5; + s.msg_type = krb_priv; + s.enc_part.etype = key->keytype; + s.enc_part.kvno = NULL; + + krb5_crypto_init(context, key, 0, &crypto); + ret = krb5_encrypt (context, + crypto, + KRB5_KU_KRB_PRIV, + buf + buf_size - len, + len, + &s.enc_part.cipher); + krb5_crypto_destroy(context, crypto); + if (ret) { + free(buf); + return ret; + } + + do { + ret = encode_KRB_PRIV (buf + buf_size - 1, buf_size, &s, &len); + + if (ret){ + if (ret == ASN1_OVERFLOW) { + u_char *tmp; + + buf_size *= 2; + tmp = realloc (buf, buf_size); + if (tmp == NULL) { + ret = ENOMEM; + goto fail; + } + buf = tmp; + } else { + goto fail; + } + } + } while(ret == ASN1_OVERFLOW); + krb5_data_free (&s.enc_part.cipher); + + outbuf->length = len; + outbuf->data = malloc (len); + if (outbuf->data == NULL) { + free(buf); + return ENOMEM; + } + memcpy (outbuf->data, buf + buf_size - len, len); + free (buf); + return 0; + +fail: + free (buf); + krb5_data_free (&s.enc_part.cipher); + return ret; +} |
