9cb6e5dddc
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@1807 ec53bebd-3082-4978-b11e-865c3cabbd6b
57 lines
1.5 KiB
C
57 lines
1.5 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_safe(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_SAFE safe;
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int len;
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len = decode_KRB_SAFE (inbuf->data, inbuf->length, &safe);
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if (len < 0)
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return ASN1_PARSE_ERROR;
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if (safe.pvno != 5)
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return KRB5KRB_AP_ERR_BADVERSION;
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if (safe.msg_type != krb_safe)
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return KRB5KRB_AP_ERR_MSG_TYPE;
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if (safe.cksum.cksumtype != CKSUMTYPE_RSA_MD4)
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return KRB5KRB_AP_ERR_INAPP_CKSUM;
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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 (safe.safe_body.timestamp == NULL ||
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safe.safe_body.usec == NULL ||
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*(safe.safe_body.timestamp) - tv.tv_sec > 600)
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return KRB5KRB_AP_ERR_SKEW;
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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 (safe.safe_body.seq_number == NULL ||
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*safe.safe_body.seq_number != ++auth_context->remote_seqnumber)
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return KRB5KRB_AP_ERR_BADORDER;
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}
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r = krb5_verify_checksum (context,
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safe.safe_body.user_data.data,
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safe.safe_body.user_data.length,
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&safe.cksum);
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if (r)
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return r;
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outbuf->length = safe.safe_body.user_data.length;
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outbuf->data = malloc(outbuf->length);
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if (outbuf->data == NULL)
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return ENOMEM;
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memcpy (outbuf->data, safe.safe_body.user_data.data, outbuf->length);
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return 0;
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}
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