Manual Pages for UNIX Operating System command usage for man ns_verify_tcp_init

Resolver Library Functions                       ns_sign(3RESOLV)



NAME
     ns_sign,    ns_sign_tcp,    ns_sign_tcp_init,     ns_verify,
     ns_verify_tcp,  ns_verify_tcp_init, ns_find_tsig - TSIG sys-
     tem

SYNOPSIS
     cc [ flag... ] file... -lresolv  -lsocket   -lnsl  [ library...]
     #include 
     #include 
     #include 
     #include 

     int ns_sign(u_char *msg, int *msglen, int msgsize, int error, void *k,
          const u_char *querysig, int querysiglen, u_char *sig, int *siglen,
          time_t in_timesigned);


     int ns_sign_tcp(u_char *msg, int *msglen, int msgsize, int error,
          ns_tcp_tsig_state *state, int done);


     int ns_sign_tcp_init(void *k, const u_char *querysig, int querysiglen,
          ns_tcp_tsig_state *state);


     int ns_verify(u_char *msg, int *msglen, void *k, const u_char *querysig,
          int querysiglen, u_char *sig, int *siglen, time_t in_timesigned,
          int nostrip);


     int ns_verify_tcp(u_char *msg, int *msglen, ns_tcp_tsig_state *state,
          int required);


     int ns_verify_tcp_init(void *k, const u_char *querysig, int querysiglen,
          ns_tcp_tsig_state *state);


     u_char *ns_find_tsig(u_char *msg, u_char *eom);


PARAMETERS
  ns_sign()
     msg            the incoming DNS message, which will be modi-
                    fied


     msglen         the length of the DNS message, on  input  and
                    output






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Resolver Library Functions                       ns_sign(3RESOLV)



     msgsize        the size of the  buffer  containing  the  DNS
                    message on input


     error          the value to be  placed  in  the  TSIG  error
                    field


     k              the (DST_KEY *) to sign the data


     querysig       for a response, the  signature  contained  in
                    the query


     querysiglen    the length of the query signature


     sig            a buffer to be filled with the generated sig-
                    nature


     siglen         the length of the signature buffer on  input,
                    the signature length on output


  ns_sign_tcp()
     msg        the incoming DNS message, which will be modified


     msglen     the length of the DNS message, on input and  out-
                put


     msgsize    the size of the buffer containing the DNS message
                on input


     error      the value to be placed in the TSIG error field


     state      the state of the operation


     done       non-zero value signifies that this  is  the  last
                packet


  ns_sign_tcp_init()
     k              the (DST_KEY *) to sign the data





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Resolver Library Functions                       ns_sign(3RESOLV)



     querysig       for a response, the  signature  contained  in
                    the query


     querysiglen    the length of the query signature


     state          the state of the operation, which  this  ini-
                    tializes


  ns_verify()
     msg            the incoming DNS message, which will be modi-
                    fied


     msglen         the length of the DNS message, on  input  and
                    output


     k              the (DST_KEY *) to sign the data


     querysig       for a response, the  signature  contained  in
                    the query


     querysiglen    the length of the query signature


     sig            a buffer to be filled with the signature con-
                    tained


     siglen         the length of the signature buffer on  input,
                    the signature length on output


     nostrip        non-zero value means that the  TSIG  is  left
                    intact


  ns_verify_tcp()
     msg         the incoming DNS message, which will be modified


     msglen      the length of the DNS message, on input and out-
                 put


     state       the state of the operation




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Resolver Library Functions                       ns_sign(3RESOLV)



     required    non-zero value signifies that a TSIG record must
                 be present at this step


  ns_verify_tcp_init()
     k              the (DST_KEY *) to verify the dat


     querysig       for a response, the  signature  contained  in
                    the quer


     querysiglen    the length of the query signature


     state          the state of the operation, which  this  ini-
                    tializes


  ns_find_tsig()
     msg    the incoming DNS messag


     eom    the length of the DNS message


DESCRIPTION
     The TSIG functions are used to implement transaction/request
     security of DNS messages.


     The ns_sign() and ns_verify() functions are the  basic  rou-
     tines.  The  ns_sign_tcp() and ns_verify_tcp() functions are
     used to sign/verify TCP messages that may be split into mul-
     tiple    packets,    such    as    zone    transfers.    The
     ns_sign_tcp_init() and ns_verify_tcp_init()  functions  ini-
     tialize  the  state  structure necessary for TCP operations.
     The ns_find_tsig() function locates the  TSIG  record  in  a
     message if one is present.

RETURN VALUES
     The ns_find_tsig() function returns a pointer  to  the  TSIG
     record if one is found, and NULL otherwise.


     All other functions return 0 on success, modifying arguments
     when necessary.


     The ns_sign() and ns_sign_tcp() functions return the follow-
     ing values:




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Resolver Library Functions                       ns_sign(3RESOLV)



     -1                        bad input data


     -ns_r_badkey              The key was invalid or the signing
                               failed.


     NS_TSIG_ERROR_NO_SPACE    The message buffer is too small.



     The ns_verify() and  ns_verify_tcp()  functions  return  the
     following values:

     -1                           bad input data


     NS_TSIG_ERROR_FORMERR        The message is malformed.


     NS_TSIG_ERROR_NO_TSIG        The message does not contain  a
                                  TSIG record.


     NS_TSIG_ERROR_ID_MISMATCH    The TSIG original ID field does
                                  not match the message ID.


     -ns_r_badkey                 Verification failed due  to  an
                                  invalid key.


     -ns_r_badsig                 Verification failed due  to  an
                                  invalid signature.


     -ns_r_badtime                Verification failed due  to  an
                                  invalid timestamp.


     ns_r_badkey                  Verification succeeded but  the
                                  message had an error of BADKEY.


     ns_r_badsig                  Verification succeeded but  the
                                  message had an error of BADSIG.


     ns_r_badtime                 Verification succeeded but  the
                                  message  had  an  error of BAD-
                                  TIME.




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Resolver Library Functions                       ns_sign(3RESOLV)



ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     resolver(3RESOLV), attributes(5)






































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