diff options
Diffstat (limited to 'third_party/heimdal/lib/krb5/mk_priv.c')
| -rw-r--r-- | third_party/heimdal/lib/krb5/mk_priv.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/krb5/mk_priv.c b/third_party/heimdal/lib/krb5/mk_priv.c new file mode 100644 index 0000000..e3b2f91 --- /dev/null +++ b/third_party/heimdal/lib/krb5/mk_priv.c @@ -0,0 +1,151 @@ +/* + * 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_priv(krb5_context context, + krb5_auth_context auth_context, + const krb5_data *userdata, + krb5_data *outbuf, + krb5_replay_data *outdata) +{ + krb5_error_code ret; + KRB_PRIV s; + EncKrbPrivPart part; + u_char *buf = NULL; + size_t buf_size; + size_t len = 0; + krb5_crypto crypto; + krb5_keyblock *key; + krb5_replay_data rdata; + + if ((auth_context->flags & + (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) && + outdata == NULL) + return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */ + + 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; + + memset(&rdata, 0, sizeof(rdata)); + + part.user_data = *userdata; + + krb5_us_timeofday (context, &rdata.timestamp, &rdata.usec); + + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) { + part.timestamp = &rdata.timestamp; + part.usec = &rdata.usec; + } else { + part.timestamp = NULL; + part.usec = NULL; + } + + if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_TIME) { + outdata->timestamp = rdata.timestamp; + outdata->usec = rdata.usec; + } + + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { + rdata.seq = auth_context->local_seqnumber; + part.seq_number = &rdata.seq; + } else + part.seq_number = NULL; + + if (auth_context->flags & KRB5_AUTH_CONTEXT_RET_SEQUENCE) + outdata->seq = auth_context->local_seqnumber; + + part.s_address = auth_context->local_address; + part.r_address = auth_context->remote_address; + + krb5_data_zero (&s.enc_part.cipher); + + ASN1_MALLOC_ENCODE(EncKrbPrivPart, buf, buf_size, &part, &len, ret); + if (ret) + goto fail; + if (buf_size != len) + krb5_abortx(context, "internal error in ASN.1 encoder"); + + s.pvno = 5; + s.msg_type = krb_priv; + s.enc_part.etype = key->keytype; + s.enc_part.kvno = NULL; + + ret = krb5_crypto_init(context, key, 0, &crypto); + if (ret) { + free (buf); + return ret; + } + 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; + } + free(buf); + + + ASN1_MALLOC_ENCODE(KRB_PRIV, buf, buf_size, &s, &len, ret); + if (ret) + goto fail; + if (buf_size != len) + krb5_abortx(context, "internal error in ASN.1 encoder"); + + krb5_data_free (&s.enc_part.cipher); + + ret = krb5_data_copy(outbuf, buf + buf_size - len, len); + if (ret) { + free(buf); + return krb5_enomem(context); + } + free (buf); + if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) + auth_context->local_seqnumber = + (auth_context->local_seqnumber + 1) & 0xFFFFFFFF; + return 0; + + fail: + free (buf); + krb5_data_free (&s.enc_part.cipher); + return ret; +} |