Thanks for getting back to me! I referred to that because memcached/memcached does not tell me how the binary protocol packets for SASL AUTH looks like. For all the server configuration and db setup, I followed https://github.com/memcached/memcached/wiki/SASLHowto and https://github.com/memcached/memcached/wiki/SASLAuthProtocol Please let me know when you have time to take a closer look.
Cheers! Jiuming dormando <[email protected]> 于2019年3月18日周一 下午4:10写道： > Hey, > > Can look more closely later, but a few quick things that might help: > > 1) stick to memcached/memcached on github - that's an old couchbase fork > you linked to. If you're using couchbase you need to talk to them instead. > > 2) in the t/ dir there're some unit tests for SASL which might help you > understand the workflow better. > > On Mon, 18 Mar 2019, Jiuming Shao wrote: > > > Hey all, > > I am writing my own implementation of a memcachedClient within which I > want to add authentication. I just started with PLAIN auth but > > failed. > > > > My main reference is this one > https://github.com/couchbase/memcached/blob/master/docs/sasl.md > > My guess is that the binary message I am sending through the wire was > wrong, thus it could never match with the secret I store in the db > > file. > > After searching around, I found out the SASL_AUTH(0X21) is also a > key-value like operation, where the key is the auth mechanism, and the > > value being auth data. The tricky part is how I put them in the outgoing > request. > > > > Please correct me if i am wrong, below is an example of PLAIN auth > request > > 1. The auth mechanism comes right after the header. in this case 'PLAIN' > > 2. A NULL byte comes after the "key" -> "PLAIN". In this case byte # 29. > > 3. Then comes the user@hostName > > 4. A NULL bytes comes after user@hostname. In this case byte # 34 > > 5. The last part is the password > > > > Byte/ 0 | 1 | 2 | 3 | > > / | | | | > > |0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7|0 1 2 3 4 5 6 7| > > +---------------+---------------+---------------+---------------+ > > 0| 0x80 | 0x21 | 0x00 | 0x05 | > > +---------------+---------------+---------------+---------------+ > > 4| 0x00 | 0x00 | 0x00 | 0x00 | > > +---------------+---------------+---------------+---------------+ > > 8| 0x00 | 0x00 | 0x00 | 0x11 | > > +---------------+---------------+---------------+---------------+ > > 12| 0x00 | 0x00 | 0x00 | 0x00 | > > +---------------+---------------+---------------+---------------+ > > 16| 0x00 | 0x00 | 0x00 | 0x00 | > > +---------------+---------------+---------------+---------------+ > > 20| 0x00 | 0x00 | 0x00 | 0x00 | > > +---------------+---------------+---------------+---------------+ > > 24| 0x50 ('P') | 0x4c ('L') | 0x41 ('A') | 0x49 ('I') | > > +---------------+---------------+---------------+---------------+ > > 28| 0x4e ('N') | 0x00 | 0x75 ('u') | 0x73 ('s') | > > +---------------+---------------+---------------+---------------+ > > 32| 0x65 ('e') | 0x72 ('r') | 0x00 | 0x70 ('p') | > > +---------------+---------------+---------------+---------------+ > > 36| 0x65 ('e') | 0x6e ('n') | 0x63 ('c') | 0x69 ('i') | > > +---------------+---------------+---------------+---------------+ > > 40| 0x6c ('l') | > > +---------------+ > > Total 41 bytes (24 bytes header, 5 bytes key and 12 value) > > > > Field (offset) (value) > > Magic (0) : 0x80 > > Opcode (1) : 0x21 > > Key length (2,3) : 0x0005 > > Extra length (4) : 0x00 > > Data type (5) : 0x00 > > Vbucket (6,7) : 0x0000 > > Total body (8-11) : 0x00000011 > > Opaque (12-15): 0x00000000 > > CAS (16-23): 0x00000000 > > > > What could be wrong? > > * In my memcached-sasl-db, should I store userName:password or > username@hostName:password? > > * Does the TotalLength of the message include the NULL bytes being > added between authKey/authData and username/password? > > * In my authData should I use \0x00userName\0x00password > or \0x00userName@hostNname\0x00password? > > * Any other suggestions? > > > > Best regards, > > Jiuming > > > > Below are Logs and configurations for your references > > > > memcached logs: Below you will find that I did a LIST_MECH(0x20) and > then did a SASL_AUTH(0X21) > > > > LRU crawler thread sleeping > > <28 new binary client connection. > > 28: going from conn_new_cmd to conn_waiting > > 28: going from conn_waiting to conn_read > > 28: going from conn_read to conn_closing > > <28 connection closed. > > 28: going from conn_closing to conn_closed > > <28 new binary client connection. > > 28: going from conn_new_cmd to conn_waiting > > 28: going from conn_waiting to conn_read > > 28: going from conn_read to conn_parse_cmd > > <28 Read binary protocol data: > > <28 0x80 0x20 0x00 0x00 > > <28 0x00 0x00 0x00 0x00 > > <28 0x00 0x00 0x00 0x00 > > <28 0x00 0x00 0x00 0x01 > > <28 0x00 0x00 0x00 0x00 > > <28 0x00 0x00 0x00 0x00 > > authenticated() in cmd 0x20 is true > > >28 Writing bin response: > > >28 0x81 0x20 0x00 0x00 > > >28 0x00 0x00 0x00 0x00 > > >28 0x00 0x00 0x00 0x15 > > >28 0x00 0x00 0x00 0x01 > > >28 0x00 0x00 0x00 0x00 > > >28 0x00 0x00 0x00 0x00 > > 28: going from conn_parse_cmd to conn_mwrite > > 28: going from conn_mwrite to conn_new_cmd > > 28: going from conn_new_cmd to conn_waiting > > 28: going from conn_waiting to conn_read > > 28: going from conn_read to conn_parse_cmd > > <28 Read binary protocol data: > > <28 0x80 0x21 0x00 0x05 > > <28 0x00 0x00 0x00 0x00 > > <28 0x00 0x00 0x00 0x14 > > <28 0x00 0x00 0x00 0x02 > > <28 0x00 0x00 0x00 0x00 > > <28 0x00 0x00 0x00 0x00 > > authenticated() in cmd 0x21 is true > > 28: going from conn_parse_cmd to conn_nread > > mech: ``PLAIN'' with 15 bytes of data > > SASL (severity 2): Password verification failed > > sasl result code: -20 > > Unknown sasl response: -20 > > >28 Writing an error: Auth failure. > > >28 Writing bin response: > > >28 0x81 0x21 0x00 0x00 > > >28 0x00 0x00 0x00 0x20 > > >28 0x00 0x00 0x00 0x0d > > >28 0x00 0x00 0x00 0x02 > > >28 0x00 0x00 0x00 0x00 > > >28 0x00 0x00 0x00 0x00 > > > > > > My memcached.conf > > > > % cat memcached.conf > > mech_list: plain > > log_level: 5 > > sasldb_path: /tmp/memcached-sasl-db > > > > My /tmp/memcached-sasl-db > > > > % cat memcached-sasl-db > > myname@myHostName:mypass > > > > My exports: > > > > export MEMCACHED_SASL_PWDB=/tmp/memcached-sasl-db > > export SASL_CONF_PATH=`pwd`/memcached.conf > > > > -- > > > > --- > > You received this message because you are subscribed to the Google > Groups "memcached" group. > > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > --- > You received this message because you are subscribed to the Google Groups > "memcached" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- --- You received this message because you are subscribed to the Google Groups "memcached" group. 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