| 1 | /*$Id: checktag.c,v 1.4 1999/10/12 23:38:36 lindberg Exp $*/ |
| 2 | /*$Name: ezmlm-idx-040 $*/ |
| 3 | #include "stralloc.h" |
| 4 | #include "scan.h" |
| 5 | #include "fmt.h" |
| 6 | #include "cookie.h" |
| 7 | #include "makehash.h" |
| 8 | #include "strerr.h" |
| 9 | #include "errtxt.h" |
| 10 | #include "subscribe.h" |
| 11 | |
| 12 | static stralloc key = {0}; |
| 13 | static stralloc line = {0}; |
| 14 | static stralloc quoted = {0}; |
| 15 | static char strnum[FMT_ULONG]; |
| 16 | static char newcookie[COOKIE]; |
| 17 | |
| 18 | char *checktag (dir,num,listno,action,seed,hash) |
| 19 | /* reads dir/sql. If not present, checks that the hash of seed matches */ |
| 20 | /* hash and returns success (NULL). If not match returns "". If error, */ |
| 21 | /* returns error string */ |
| 22 | |
| 23 | char *dir; /* the db base dir */ |
| 24 | unsigned long num; /* message number */ |
| 25 | unsigned long listno; /* bottom of range => slave */ |
| 26 | char *action; |
| 27 | char *seed; /* cookie base */ |
| 28 | char *hash; /* cookie */ |
| 29 | { |
| 30 | |
| 31 | if (!seed) return (char *) 0; /* no data - accept */ |
| 32 | |
| 33 | strnum[fmt_ulong(strnum,num)] = '\0'; /* message nr ->string*/ |
| 34 | |
| 35 | switch(slurp("key",&key,32)) { |
| 36 | case -1: |
| 37 | return ERR_READ_KEY; |
| 38 | case 0: |
| 39 | return ERR_NOEXIST_KEY; |
| 40 | } |
| 41 | |
| 42 | cookie(newcookie,key.s,key.len,strnum,seed,action); |
| 43 | if (byte_diff(hash,COOKIE,newcookie)) return ""; |
| 44 | else return (char *) 0; |
| 45 | |
| 46 | } |