0fe09b54ab
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@2304 ec53bebd-3082-4978-b11e-865c3cabbd6b
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
#include <krb5_locl.h>
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RCSID("$Id$");
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krb5_error_code
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krb5_rd_priv(krb5_context context,
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krb5_auth_context auth_context,
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const krb5_data *inbuf,
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krb5_data *outbuf,
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/*krb5_replay_data*/ void *outdata)
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{
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krb5_error_code r;
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KRB_PRIV priv;
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EncKrbPrivPart part;
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size_t len;
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krb5_data plain;
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r = decode_KRB_PRIV (inbuf->data, inbuf->length, &priv, &len);
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if (r)
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goto failure;
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if (priv.pvno != 5) {
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r = KRB5KRB_AP_ERR_BADVERSION;
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goto failure;
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}
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if (priv.msg_type != krb_priv) {
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r = KRB5KRB_AP_ERR_MSG_TYPE;
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goto failure;
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}
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r = krb5_decrypt (context,
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priv.enc_part.cipher.data,
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priv.enc_part.cipher.length,
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priv.enc_part.etype,
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&auth_context->key,
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&plain);
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if (r)
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goto failure;
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r = decode_EncKrbPrivPart (plain.data, plain.length, &part, &len);
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if (r)
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return r;
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/* check sender address */
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if (part.s_address
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&& auth_context->remote_address
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&& !krb5_address_compare (context,
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auth_context->remote_address,
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part.s_address)) {
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r = KRB5KRB_AP_ERR_BADADDR;
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goto failure_part;
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}
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/* check receiver address */
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if (part.r_address
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&& !krb5_address_compare (context,
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auth_context->local_address,
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part.r_address)) {
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r = KRB5KRB_AP_ERR_BADADDR;
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goto failure_part;
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}
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/* check timestamp */
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if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_TIME) {
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struct timeval tv;
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gettimeofday (&tv, NULL);
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if (part.timestamp == NULL ||
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part.usec == NULL ||
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abs(*part.timestamp - tv.tv_sec) > context->max_skew) {
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r = KRB5KRB_AP_ERR_SKEW;
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goto failure_part;
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}
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}
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/* XXX - check replay cache */
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/* check sequence number */
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if (auth_context->flags & KRB5_AUTH_CONTEXT_DO_SEQUENCE) {
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if (part.seq_number == NULL ||
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*part.seq_number != ++auth_context->remote_seqnumber) {
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r = KRB5KRB_AP_ERR_BADORDER;
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goto failure_part;
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}
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}
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r = krb5_data_copy (outbuf, part.user_data.data, part.user_data.length);
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if (r)
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goto failure_part;
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free_EncKrbPrivPart (&part);
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free_KRB_PRIV (&priv);
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return 0;
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failure_part:
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free_EncKrbPrivPart (&part);
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failure:
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free_KRB_PRIV (&priv);
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return r;
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}
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