feat(kerberos): native KerberosClient + ASREPRoast (no external Kerberos library)#78
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Implements a WinRM client library (MS-WSMV over HTTP, port 5985/5986)
with full NTLMv2 message-level sealing (SIGN + SEAL + KEY_EXCH) as
required by the Windows WinRM service.
Public API:
c := client.NewClient(host, port)
c.Connect()
err := c.SessionSetup(creds)
Structure:
network/winrm/types/ — protocol constants
network/winrm/transport/ — raw TCP transport (NTLM connection-binding)
network/winrm/client/ — Client, SessionSetup, NTLM sealing pipeline
0xbbuddha
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Add crypto/nfold (RFC 3961 N-FOLD), crypto/aescts (AES-CTS / RFC 3962), network/kerberos/messages (all ASN.1 types with Marshal/Unmarshal per DG.02), network/kerberos/crypto (RC4-HMAC etype 23, AES-128/256 etype 17/18 with PBKDF2 + N-FOLD key derivation), and a fully native KerberosClient and ASREPRoast that depend on no external Kerberos library. KerberosInit (gokrb5 config helper) is kept for LDAP GSSAPI binds in network/ldap.
0xbbuddha
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Summary
Implements Kerberos protocol support natively in Manticore, without relying on
an external Kerberos library for authentication primitives.
New crypto primitives
crypto/nfold— N-FOLD function (RFC 3961 §5.1)crypto/aescts— AES-CTS encryption mode (RFC 3962)New
network/kerberos/messagespackageAll Kerberos ASN.1 message types with
Marshal/Unmarshalper DG.02:ASReq,ASRep,TGSReq,TGSRep,KRBError,Ticket,APReq,Authenticator,PAEncTSEnc,ETypeInfo2,EncASRepPart,EncTGSRepPartNew
network/kerberos/cryptopackageKey derivation and encryption for all supported etypes:
StringToKeyvia NT hash, per RFC 4757network/kerberos— rewrittentransport.go— raw TCP transport to KDC with 4-byte length prefix (RFC 4120 §7.2.2)asreproast.go—ASREPRoast(): sends AS-REQ without PA-DATA, returns rawEncryptedDatacipher from AS-REP for offline crackingclient.go—KerberosClientwith:WithPassword— derive key + PA-ENC-TIMESTAMP pre-auth (probes KDC for etype/salt via ETYPE-INFO2)GetTGT— full AS-REQ/AS-REP exchange, decryptsEncASRepPart, stores session keyGetTGS— builds AP-REQ from TGT, sends TGS-REQ, decryptsEncTGSRepPartDestroy— zeroes key material