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8.3. Protocol constants and associated values
The following tables list constants used in the protocol and defines
their meanings.
---------------+-----------+----------+----------------+---------------
Encryption type|etype value|block size|minimum pad size|confounder size
---------------+-----------+----------+----------------+---------------
NULL 0 1 0 0
des-cbc-crc 1 8 4 8
des-cbc-md4 2 8 0 8
des-cbc-md5 3 8 0 8
<reserved> 4
des3-cbc-md5 5 8 0 8
<reserved> 0x8003
-------------------------------+-------------------+-------------
Checksum type |sumtype value |checksum size
-------------------------------+-------------------+-------------
CRC32 1 4
rsa-md4 2 16
rsa-md4-des 3 24
des-mac 4 16
des-mac-k 5 8
rsa-md4-des-k 6 16
rsa-md5 7 16
rsa-md5-des 8 24
rsa-md5-des3 9 24
-------------------------------+-----------------
padata type |padata-type value
-------------------------------+-----------------
PA-TGS-REQ 1
PA-ENC-TIMESTAMP 2
PA-PW-SALT 3
<reserved> 4
PA-ENC-UNIX-TIME 5
PA-SANDIA-SECUREID 6
PA-SESAME 7
PA-OSF-DCE 8
PA-CYBERSAFE-SECUREID 9
PA-AFS3-SALT 10
PA-ETYPE-INFO 11
-------------------------------+-------------
authorization data type |ad-type value
-------------------------------+-------------
reserved values 0-63
AD-OSF-DCE 64
AD-SESAME 65
-------------------------------+-----------------
alternate authentication type |method-type value
-------------------------------+-----------------
reserved values 0-63
ATT-CHALLENGE-RESPONSE 64
-------------------------------+-------------
transited encoding type |tr-type value
-------------------------------+-------------
DOMAIN-X500-COMPRESS 1
reserved values all others
--------------+-------+-----------------------------------------
Label |Value |Meaning or MIT code
--------------+-------+-----------------------------------------
pvno 5 current Kerberos protocol version number
message types
KRB_AS_REQ 10 Request for initial authentication
KRB_AS_REP 11 Response to KRB_AS_REQ request
KRB_TGS_REQ 12 Request for authentication based on TGT
KRB_TGS_REP 13 Response to KRB_TGS_REQ request
KRB_AP_REQ 14 application request to server
KRB_AP_REP 15 Response to KRB_AP_REQ_MUTUAL
KRB_SAFE 20 Safe (checksummed) application message
KRB_PRIV 21 Private (encrypted) application message
KRB_CRED 22 Private (encrypted) message to forward credentials
KRB_ERROR 30 Error response
name types
KRB_NT_UNKNOWN 0 Name type not known
KRB_NT_PRINCIPAL 1 Just the name of the principal as in DCE, or for users
KRB_NT_SRV_INST 2 Service and other unique instance (krbtgt)
KRB_NT_SRV_HST 3 Service with host name as instance (telnet, rcommands)
KRB_NT_SRV_XHST 4 Service with host as remaining components
KRB_NT_UID 5 Unique ID
error codes
KDC_ERR_NONE 0 No error
KDC_ERR_NAME_EXP 1 Client's entry in database has expired
KDC_ERR_SERVICE_EXP 2 Server's entry in database has expired
KDC_ERR_BAD_PVNO 3 Requested protocol version # not supported
KDC_ERR_C_OLD_MAST_KVNO 4 Client's key encrypted in old master key
KDC_ERR_S_OLD_MAST_KVNO 5 Server's key encrypted in old master key
KDC_ERR_C_PRINCIPAL_UNKNOWN 6 Client not found in Kerberos database
KDC_ERR_S_PRINCIPAL_UNKNOWN 7 Server not found in Kerberos database
KDC_ERR_PRINCIPAL_NOT_UNIQUE 8 Multiple principal entries in database
KDC_ERR_NULL_KEY 9 The client or server has a null key
KDC_ERR_CANNOT_POSTDATE 10 Ticket not eligible for postdating
KDC_ERR_NEVER_VALID 11 Requested start time is later than end time
KDC_ERR_POLICY 12 KDC policy rejects request
KDC_ERR_BADOPTION 13 KDC cannot accommodate requested option
KDC_ERR_ETYPE_NOSUPP 14 KDC has no support for encryption type
KDC_ERR_SUMTYPE_NOSUPP 15 KDC has no support for checksum type
KDC_ERR_PADATA_TYPE_NOSUPP 16 KDC has no support for padata type
KDC_ERR_TRTYPE_NOSUPP 17 KDC has no support for transited type
KDC_ERR_CLIENT_REVOKED 18 Clients credentials have been revoked
KDC_ERR_SERVICE_REVOKED 19 Credentials for server have been revoked
KDC_ERR_TGT_REVOKED 20 TGT has been revoked
KDC_ERR_CLIENT_NOTYET 21 Client not yet valid - try again later
KDC_ERR_SERVICE_NOTYET 22 Server not yet valid - try again later
KDC_ERR_KEY_EXPIRED 23 Password has expired - change to reset
KDC_ERR_PREAUTH_FAILED 24 Pre-authentication information was invalid
KDC_ERR_PREAUTH_REQUIRED 25 Additional pre-authentication required*
KDC_ERR_SERVER_NOMATCH 26 Requested server and ticket don't match
KRB_AP_ERR_BAD_INTEGRITY 31 Integrity check on decrypted field failed
KRB_AP_ERR_TKT_EXPIRED 32 Ticket expired
KRB_AP_ERR_TKT_NYV 33 Ticket not yet valid
KRB_AP_ERR_REPEAT 34 Request is a replay
KRB_AP_ERR_NOT_US 35 The ticket isn't for us
KRB_AP_ERR_BADMATCH 36 Ticket and authenticator don't match
KRB_AP_ERR_SKEW 37 Clock skew too great
KRB_AP_ERR_BADADDR 38 Incorrect net address
KRB_AP_ERR_BADVERSION 39 Protocol version mismatch
KRB_AP_ERR_MSG_TYPE 40 Invalid msg type
KRB_AP_ERR_MODIFIED 41 Message stream modified
KRB_AP_ERR_BADORDER 42 Message out of order
KRB_AP_ERR_BADKEYVER 44 Specified version of key is not available
KRB_AP_ERR_NOKEY 45 Service key not available
KRB_AP_ERR_MUT_FAIL 46 Mutual authentication failed
KRB_AP_ERR_BADDIRECTION 47 Incorrect message direction
KRB_AP_ERR_METHOD 48 Alternative authentication method required*
KRB_AP_ERR_BADSEQ 49 Incorrect sequence number in message
KRB_AP_ERR_INAPP_CKSUM 50 Inappropriate type of checksum in message
KRB_ERR_GENERIC 60 Generic error (description in e-text)
KRB_ERR_FIELD_TOOLONG 61 Field is too long for this implementation
*This error carries additional information in the e-data field. The
contents of the e-data field for this message is described in section
5.9.1.
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