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MySQL 5.1: Item_func_aes_decrypt Class Reference

Item_func_aes_decrypt Class Reference

#include <item_strfunc.h>

Inheritance diagram for Item_func_aes_decrypt:

[legend]Collaboration diagram for Item_func_aes_decrypt:

[legend]List of all members.


Public Member Functions
	Item_func_aes_decrypt (Item a, Item b)
String *	val_str (String *)
void	fix_length_and_dec ()
const char *	func_name () const

Detailed Description

Definition at line 73 of file item_strfunc.h.

Constructor & Destructor Documentation

Item_func_aes_decrypt::Item_func_aes_decrypt	(	Item *	a,
		Item *	b
	)			`[inline]`

Definition at line 76 of file item_strfunc.h.

00076 :Item_str_func(a,b) {}

Member Function Documentation

void Item_func_aes_decrypt::fix_length_and_dec ( ) [virtual]

Implements Item_result_field.

Definition at line 289 of file item_strfunc.cc.

References Item_func::args, Item::max_length, and Item::maybe_null.

00290 {
00291    max_length=args[0]->max_length;
00292    maybe_null= 1;
00293 }

const char* Item_func_aes_decrypt::func_name ( ) const [inline, virtual]

Implements Item_func.

Definition at line 79 of file item_strfunc.h.

00079 { return "aes_decrypt"; }

String * Item_func_aes_decrypt::val_str ( String * ) [virtual]

Implements Item.

Definition at line 256 of file item_strfunc.cc.

References String::alloc(), Item_func::args, DBUG_ASSERT, DBUG_ENTER, DBUG_RETURN, Item::fixed, key, String::length(), my_aes_decrypt(), Item::null_value, String::ptr(), Item::str_value, system_charset_info, and Item::val_str().

00257 {
00258   DBUG_ASSERT(fixed == 1);
00259   char key_buff[80];
00260   String tmp_key_value(key_buff, sizeof(key_buff), system_charset_info);
00261   String *sptr, *key;
00262   DBUG_ENTER("Item_func_aes_decrypt::val_str");
00263 
00264   sptr= args[0]->val_str(str);                  // String to decrypt
00265   key=  args[1]->val_str(&tmp_key_value);       // Key
00266   if (sptr && key)                      // Need to have both arguments not NULL
00267   {
00268     null_value=0;
00269     if (!str_value.alloc(sptr->length()))  // Ensure that memory is free
00270     {
00271       // finally decrypt directly to allocated buffer.
00272       int length;
00273       length=my_aes_decrypt(sptr->ptr(), sptr->length(),
00274                             (char*) str_value.ptr(),
00275                             key->ptr(), key->length());
00276       if (length >= 0)  // if we got correct data data
00277       {
00278         str_value.length((uint) length);
00279         DBUG_RETURN(&str_value);
00280       }
00281     }
00282   }
00283   // Bad parameters. No memory or bad data will all go here
00284   null_value=1;
00285   DBUG_RETURN(0);
00286 }

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The documentation for this class was generated from the following files:

mysql/src/5.1-dbg/sql/item_strfunc.h
mysql/src/5.1-dbg/sql/item_strfunc.cc

Generated on Sat Sep 9 21:25:08 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

Item_func_aes_decrypt Class Reference

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation