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   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  Copyright (C) 2006-2009 Brian Aker All rights reserved.
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  37
  38 #include <libmemcached/common.h>
  39
  40 static inline memcached_return_t memcached_validate_key_length(size_t key_length, bool)
  41 {
  42   if (key_length == 0)
  43   {
  44     return MEMCACHED_BAD_KEY_PROVIDED;
  45   }
  46
  47   // No one ever reimplemented MEMCACHED to use keys longer then the original ascii length
  48 #if 0
  49   if (binary)
  50   {
  51     if (key_length > 0xffff)
  52     {
  53       return MEMCACHED_BAD_KEY_PROVIDED;
  54     }
  55   }
  56   else
  57 #endif
  58   {
  59     if (key_length >= MEMCACHED_MAX_KEY)
  60     {
  61       return MEMCACHED_BAD_KEY_PROVIDED;
  62     }
  63   }
  64
  65   return MEMCACHED_SUCCESS;
  66 }
  67
  68 memcached_return_t memcached_key_test(memcached_st &memc,
  69                                       const char * const *keys,
  70                                       const size_t *key_length,
  71                                       size_t number_of_keys)
  72 {
  73   if (number_of_keys == 0)
  74   {
  75     return memcached_set_error(memc, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT, memcached_literal_param("Numbers of keys provided was zero"));
  76   }
  77
  78   if (keys == NULL or key_length == NULL)
  79   {
  80     return memcached_set_error(memc, MEMCACHED_BAD_KEY_PROVIDED, MEMCACHED_AT, memcached_literal_param("Key was NULL or length of key was zero."));
  81   }
  82
  83   const bool is_binary= memcached_flag(memc, MEMCACHED_FLAG_BINARY_PROTOCOL);
  84
  85   // If we don't need to verify the key, or we are using the binary protoocol,
  86   // we just check the size of the key
  87   for (size_t x= 0; x < number_of_keys; ++x)
  88   {
  89     // We should set binary key, but the memcached server is broken for
  90     // longer keys at the moment.
  91     memcached_return_t rc= memcached_validate_key_length(*(key_length +x), false /* memc.flags.binary_protocol */);
  92     if (memcached_failed(rc))
  93     {
  94       return memcached_set_error(memc, rc, MEMCACHED_AT, memcached_literal_param("Key provided was too long."));
  95     }
  96
  97     if (memc.flags.verify_key and is_binary == false)
  98     {
  99       for (size_t y= 0; y < *(key_length +x); ++y)
 100       {
 101         if ((isgraph(keys[x][y])) == 0)
 102         {
 103           return memcached_set_error(memc, MEMCACHED_BAD_KEY_PROVIDED, MEMCACHED_AT, memcached_literal_param("Key provided had invalid character."));
 104         }
 105       }
 106     }
 107   }
 108
 109   return MEMCACHED_SUCCESS;
 110 }
 111