The world's most popular open source database

MySQL 5.1: SQL_CRYPT Class Reference

SQL_CRYPT Class Reference

#include <sql_crypt.h>

Inheritance diagram for SQL_CRYPT:

[legend]Collaboration diagram for SQL_CRYPT:

[legend]List of all members.


Public Member Functions
	SQL_CRYPT (const char *seed)
	SQL_CRYPT (ulong *seed)
	~SQL_CRYPT ()
void	init ()
void	encode (char *str, uint length)
void	decode (char *str, uint length)
Private Member Functions
void	crypt_init (ulong *seed)
Private Attributes
rand_struct rand	org_rand
char	decode_buff [256]
char	encode_buff [256]
uint	shift

Detailed Description

Definition at line 22 of file sql_crypt.h.

Constructor & Destructor Documentation

SQL_CRYPT::SQL_CRYPT ( const char * seed )

Definition at line 32 of file sql_crypt.cc.

References crypt_init(), hash_password(), and strlen().

00033 {
00034   ulong rand_nr[2];
00035   hash_password(rand_nr,password, strlen(password));
00036   crypt_init(rand_nr);
00037 }

Here is the call graph for this function:

SQL_CRYPT::SQL_CRYPT ( ulong * seed ) [inline]

Definition at line 30 of file sql_crypt.h.

References crypt_init().

00031   {
00032     crypt_init(seed);
00033   }

Here is the call graph for this function:

SQL_CRYPT::~SQL_CRYPT ( ) [inline]

Definition at line 34 of file sql_crypt.h.

00034 {}

Member Function Documentation

void SQL_CRYPT::crypt_init ( ulong * seed ) [private]

Definition at line 39 of file sql_crypt.cc.

References decode_buff, encode_buff, my_rnd(), org_rand, randominit(), and shift.

Referenced by SQL_CRYPT().

00040 {
00041   uint i;
00042   randominit(&rand,rand_nr[0],rand_nr[1]);
00043 
00044   for (i=0 ; i<=255; i++)
00045    decode_buff[i]= (char) i;
00046 
00047   for (i=0 ; i<= 255 ; i++)
00048   {
00049     int idx= (uint) (my_rnd(&rand)*255.0);
00050     char a= decode_buff[idx];
00051     decode_buff[idx]= decode_buff[i];
00052     decode_buff[+i]=a;
00053   }
00054   for (i=0 ; i <= 255 ; i++)
00055    encode_buff[(uchar) decode_buff[i]]=i;
00056   org_rand=rand;
00057   shift=0;
00058 }

Here is the call graph for this function:

Here is the caller graph for this function:

void SQL_CRYPT::decode	(	char *	str,
		uint	length
	)

Definition at line 73 of file sql_crypt.cc.

References decode_buff, my_rnd(), and shift.

Referenced by Item_func_decode::val_str().

00074 {
00075   for (uint i=0; i < length; i++)
00076   {
00077     shift^=(uint) (my_rnd(&rand)*255.0);
00078     uint idx= (uint) ((uchar) str[0] ^ shift);
00079     *str = decode_buff[idx];
00080     shift^= (uint) (uchar) *str++;
00081   }
00082 }

Here is the call graph for this function:

Here is the caller graph for this function:

void SQL_CRYPT::encode	(	char *	str,
		uint	length
	)

Definition at line 61 of file sql_crypt.cc.

References encode_buff, my_rnd(), and shift.

Referenced by mysql_create_frm(), and Item_func_encode::val_str().

00062 {
00063   for (uint i=0; i < length; i++)
00064   {
00065     shift^=(uint) (my_rnd(&rand)*255.0);
00066     uint idx= (uint) (uchar) str[0];
00067     *str++ = (char) ((uchar) encode_buff[idx] ^ shift);
00068     shift^= idx;
00069   }
00070 }