# MIT Kerberos Documentation

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# krb5_rd_priv - Process a KRB-PRIV message.

krb5_error_code krb5_rd_priv(krb5_context context, krb5_auth_context auth_context, const krb5_data *inbuf, krb5_data *userdata_out, krb5_replay_data *rdata_out)

param:

  [in] context - Library context

  [in] auth_context - Authentication structure

  [in] inbuf - KRB-PRIV message to be parsed

  [out] userdata_out - Data parsed from KRB-PRIV message

  [out] rdata_out - Replay data. Specify NULL if not needed

retval:

  - 0 Success; otherwise - Kerberos error codes

This function parses a KRB-PRIV message, verifies its integrity, and stores its unencrypted data into userdata_out .

If auth_context has a remote address set, the address will be used to verify the sender address in the KRB-PRIV message. If auth_context has a local address set, it will be used to verify the receiver address in the KRB-PRIV message if the message contains one.

If the KRB5_AUTH_CONTEXT_DO_SEQUENCE flag is set in auth_context , the sequence number of the KRB-PRIV message is checked against the remote sequence number field of auth_context . Otherwise, the sequence number is not used.

If the KRB5_AUTH_CONTEXT_DO_TIME flag is set in auth_context , then the timestamp in the message is verified to be within the permitted clock skew of the current time, and the message is checked against an in-memory replay cache to detect reflections or replays.

Use krb5_free_data_contents() to free userdata_out when it is no longer needed.

Note

The rdata_out argument is required if the KRB5_AUTH_CONTEXT_RET_TIME or KRB5_AUTH_CONTEXT_RET_SEQUENCE flag is set in auth_context .