diff options
Diffstat (limited to 'crypto/heimdal/lib/krb5/rd_safe.c')
| -rw-r--r-- | crypto/heimdal/lib/krb5/rd_safe.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/crypto/heimdal/lib/krb5/rd_safe.c b/crypto/heimdal/lib/krb5/rd_safe.c deleted file mode 100644 index b2fb5c5..0000000 --- a/crypto/heimdal/lib/krb5/rd_safe.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * 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> - -RCSID("$Id: rd_safe.c 19827 2007-01-11 02:54:59Z lha $"); - -static krb5_error_code -verify_checksum(krb5_context context, - krb5_auth_context auth_context, - KRB_SAFE *safe) -{ - krb5_error_code ret; - u_char *buf; - size_t buf_size; - size_t len; - Checksum c; - krb5_crypto crypto; - krb5_keyblock *key; - - c = safe->cksum; - safe->cksum.cksumtype = 0; - safe->cksum.checksum.data = NULL; - safe->cksum.checksum.length = 0; - - ASN1_MALLOC_ENCODE(KRB_SAFE, buf, buf_size, safe, &len, ret); - if(ret) - return ret; - if(buf_size != len) - krb5_abortx(context, "internal error in ASN.1 encoder"); - - if (auth_context->remote_subkey) - key = auth_context->remote_subkey; - else if (auth_context->local_subkey) - key = auth_context->local_subkey; - else - key = auth_context->keyblock; - - ret = krb5_crypto_init(context, key, 0, &crypto); - if (ret) - goto out; - ret = krb5_verify_checksum (context, - crypto, - KRB5_KU_KRB_SAFE_CKSUM, - buf + buf_size - len, - len, - &c); - krb5_crypto_destroy(context, crypto); -out: - safe->cksum = c; - free (buf); - return ret; -} - -krb5_error_code KRB5_LIB_FUNCTION -krb5_rd_safe(krb5_context context, - krb5_auth_context auth_context, - const krb5_data *inbuf, - krb5_data *outbuf, - krb5_replay_data *outdata) -{ - krb5_error_code ret; - KRB_SAFE safe; - size_t len; - - if (outbuf) - krb5_data_zero(outbuf); - - if ((auth_context->flags & - (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE)) && - outdata == NULL) { - krb5_set_error_string(context, "rd_safe: need outdata to return data"); - return KRB5_RC_REQUIRED; /* XXX better error, MIT returns this */ - } - - ret = decode_KRB_SAFE (inbuf->data, inbuf->length, &safe, &len); - if (ret) - return ret; - if (safe.pvno != 5) { - ret = KRB5KRB_AP_ERR_BADVERSION; - krb5_clear_error_string (context); - goto failure; - } - if (safe.msg_type != krb_safe) { - ret = KRB5KRB_AP_ERR_MSG_TYPE; - krb5_clear_error_string (context); - goto failure; - } - if (!krb5_checksum_is_keyed(context, safe.cksum.cksumtype) - || !krb5_checksum_is_collision_proof(context, safe.cksum.cksumtype)) { - ret = KRB5KRB_AP_ERR_INAPP_CKSUM; - krb5_clear_error_string (context); - goto failure; - } - - /* check sender address */ - - if (safe.safe_body.s_address - && auth_context->remote_address - && !krb5_address_compare (context, - auth_context->remote_address, - safe.safe_body.s_address)) { - ret = KRB5KRB_AP_ERR_BADADDR; - krb5_clear_error_string (context); - goto failure; - } - - /* check receiver address */ - - if (safe.safe_body.r_address - && auth_context->local_address - && !krb5_address_compare (context, - auth_context->local_address, - safe.safe_body.r_address)) { - ret = KRB5KRB_AP_ERR_BADADDR; - krb5_clear_error_string (context); - goto failure; - } - - /* check timestamp */ - if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) { - krb5_timestamp sec; - - krb5_timeofday (context, &sec); - - if (safe.safe_body.timestamp == NULL || - safe.safe_body.usec == NULL || - abs(*safe.safe_body.timestamp - sec) > context->max_skew) { - ret = KRB5KRB_AP_ERR_SKEW; - krb5_clear_error_string (context); - goto failure; - } - } - /* XXX - check replay cache */ - - /* check sequence number. since MIT krb5 cannot generate a sequence - number of zero but instead generates no sequence number, we accept that - */ - - if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) { - if ((safe.safe_body.seq_number == NULL - && auth_context->remote_seqnumber != 0) - || (safe.safe_body.seq_number != NULL - && *safe.safe_body.seq_number != - auth_context->remote_seqnumber)) { - ret = KRB5KRB_AP_ERR_BADORDER; - krb5_clear_error_string (context); - goto failure; - } - auth_context->remote_seqnumber++; - } - - ret = verify_checksum (context, auth_context, &safe); - if (ret) - goto failure; - - outbuf->length = safe.safe_body.user_data.length; - outbuf->data = malloc(outbuf->length); - if (outbuf->data == NULL && outbuf->length != 0) { - ret = ENOMEM; - krb5_set_error_string (context, "malloc: out of memory"); - krb5_data_zero(outbuf); - goto failure; - } - memcpy (outbuf->data, safe.safe_body.user_data.data, outbuf->length); - - if ((auth_context->flags & - (KRB5_AUTH_CONTEXT_RET_TIME | KRB5_AUTH_CONTEXT_RET_SEQUENCE))) { - /* if these fields are not present in the safe-part, silently - return zero */ - memset(outdata, 0, sizeof(*outdata)); - if(safe.safe_body.timestamp) - outdata->timestamp = *safe.safe_body.timestamp; - if(safe.safe_body.usec) - outdata->usec = *safe.safe_body.usec; - if(safe.safe_body.seq_number) - outdata->seq = *safe.safe_body.seq_number; - } - - failure: - free_KRB_SAFE (&safe); - return ret; -} |
