oracle加密函数使用

create or replace package PG_ENCRYPT_DECRYPT

  is

  iKey varchar2(:='Oracle9i';

  function GEN_RAW_KEY ( iKey in varchar2) return raw;

  function DECRYPT_3KEY_MODE(iValue in raw,iMode in pls_integer)return varchar2;

  function ENCRYPT_3KEY_MODE(iValue in varchar2,iMode in pls_integer)return raw;

  function FormatStr(iValue in varchar2)return varchar2;

  function FormatStr2(iValue in varchar2)return varchar2;

  end;

  /////////

  create or replace package body PG_ENCRYPT_DECRYPT

  is

  function GEN_RAW_KEY ( iKey in varchar2)

  return raw

  as

  rawkey raw(240) := '';

  begin

  for i in 1..length(iKey) loop

  rawkey := rawkeyhextoraw(to_char(ascii(substr(iKey, i, 1))));

  end loop;

  return rawkey;

  end GEN_RAW_KEY;

  /* Creating function DECRYPT_3KEY_MODE*/

  FUNCTION DECRYPT_3KEY_MODE ( iValue in raw, iMode in pls_integer)return varchar2

  as

  vDecrypted varchar2(4000);

  rawkey raw(240) := '';

  begin

  rawkey := GEN_RAW_KEY(iKey);-- decrypt input string

  vDecrypted := dbms_obfuscation_toolkit.des3decrypt (UTL_RAW.CAST_TO_VARCHAR2(iValue), key_string => rawkey, which => iMode);

  return FormatStr2(vDecrypted);

  end DECRYPT_3KEY_MODE;

  /*Creating function ENCRYPT_3KEY_MODE*/

  FUNCTION ENCRYPT_3KEY_MODE ( iValue in varchar2, iMode in pls_integer)return raw

  as

  vEncrypted varchar2(4000);

  vEncryptedRaw Raw(204;

  rawkey raw(240) := '';

  begin

  rawkey := GEN_RAW_KEY(iKey);-- encrypt input string

  vEncrypted := dbms_obfuscation_toolkit.des3encrypt (FormatStr(iValue), key_string => rawkey, which => iMode);

  -- convert to raw as out

  vEncryptedRaw := UTL_RAW.CAST_TO_RAW(vEncrypted);

  return vEncryptedRaw;

  end ENCRYPT_3KEY_MODE;

  function FormatStr(iValue in varchar2)return varchar2

  as

  begin

  declare

  i number;

  j number;

  m_value varchar2(4000);

  begin

  m_value:=iValue;

  i:=(length(m_value) mod;

  if i<>0 then

  j:=1;

  for j in 1..(8-i) loop

  m_value:=m_value'#';

  end loop;

  end if;

  return m_value;

  end;

  end FormatStr;

  function FormatStr2(iValue in varchar2)return varchar2

  as

  begin

  declare

  i number;

  j number;

  m_value varchar2(4000);

  begin

  m_value:=iValue;

  i:=instr(iValue,'#',1,1);

  if i>0 then

  m_value:=substr(m_value,1,i-1);

  end if;

  return m_value;

  end;

  end FormatStr2;

  end PG_ENCRYPT_DECRYPT;

  ////////////

  create table users1(

  userid varchar2(50)

  primary key,

  passWord varchar2(4000), --密码原文

  encrypted varchar2(4000) --加密后的密码

  );

  insert into users1 values ('user1','user1234yyyy',null);

  insert into users1 values ('user2','abcd1234yy',null);

  insert into users1 values ('user3','oracle12yyy',null);

  update users1 set encrypted = PG_ENCRYPT_DECRYPT.ENCRYPT_3KEY_MODE(password,1);--加密

  select * from users1;--正常查看

  select userid,password,PG_ENCRYPT_DECRYPT.DECRYPT_3KEY_MODE(encrypted,1) DECRYPTED from users1;--解密后查看

作者: 疯女人的笑   发布时间: 2011-08-08

什么东东???????????

作者: wangmingrei   发布时间: 2011-08-20