Initial commit for Encode/Decode.

utils/funcexp/CMakeLists.txt

@@ -30,8 +30,10 @@ set(funcexp_LIB_SRCS
     func_dayname.cpp
     func_dayofweek.cpp
     func_dayofyear.cpp
+    func_decode.cpp
     func_div.cpp
     func_elt.cpp
+    func_encode.cpp
     func_exp.cpp
     func_extract.cpp
     func_find_in_set.cpp
@@ -106,7 +108,8 @@ set(funcexp_LIB_SRCS
     func_week.cpp
     func_weekday.cpp
     func_year.cpp
-    func_yearweek.cpp)
+    func_yearweek.cpp
+    sql_crypt.cpp)
 
 add_library(funcexp SHARED ${funcexp_LIB_SRCS})
 

utils/funcexp/func_decode.cpp

@@ -0,0 +1,71 @@
+#include <cstdlib>
+#include <string>
+using namespace std;
+
+#include "functor_str.h"
+#include "funchelpers.h"
+#include "functioncolumn.h"
+using namespace execplan;
+
+namespace funcexp
+{
+
+void Func_decode::hash_password(ulong *result, const char *password, uint password_len)
+{
+  ulong nr=1345345333L, add=7, nr2=0x12345671L;
+  ulong tmp;
+  const char *password_end= password + password_len;
+  for (; password < password_end; password++)
+  {
+    if (*password == ' ' || *password == '\t')
+      continue;
+    tmp= (ulong) (unsigned char) *password;
+    nr^= (((nr & 63)+add)*tmp)+ (nr << 8);
+    nr2+=(nr2 << 8) ^ nr;
+    add+=tmp;
+  }
+  result[0]=nr & (((ulong) 1L << 31) -1L);
+  result[1]=nr2 & (((ulong) 1L << 31) -1L);
+}
+
+CalpontSystemCatalog::ColType Func_decode::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+    return resultType;
+}
+
+string Func_decode::getStrVal(rowgroup::Row& row,
+                           FunctionParm& parm,
+                           bool& isNull,
+                           CalpontSystemCatalog::ColType&)
+{
+    const string& str = parm[0]->data()->getStrVal(row, isNull);
+    if (isNull)
+    {
+        return "";
+    }
+    const string& password = parm[1]->data()->getStrVal(row, isNull);
+    if (isNull)
+    {
+        return "";
+    }
+
+    int nStrLen = str.length();
+    int nPassLen = password.length();
+    char res[nStrLen+1];
+    memset(res,0,nStrLen+1);
+
+    if (!fSeeded)
+    {
+        hash_password(fSeeds, password.c_str(), nPassLen);
+        sql_crypt.init(fSeeds);
+        fSeeded = true;
+    }
+
+    memcpy(res,str.c_str(),nStrLen);
+    sql_crypt.decode(res,nStrLen);
+    sql_crypt.reinit();
+
+    return res;
+}
+
+}

utils/funcexp/func_encode.cpp

@@ -0,0 +1,73 @@
+#include <cstdlib>
+#include <string>
+using namespace std;
+
+#include "functor_str.h"
+#include "funchelpers.h"
+#include "functioncolumn.h"
+using namespace execplan;
+
+namespace funcexp
+{
+
+void Func_encode::hash_password(ulong *result, const char *password, uint password_len)
+{
+  ulong nr=1345345333L, add=7, nr2=0x12345671L;
+  ulong tmp;
+  const char *password_end= password + password_len;
+  for (; password < password_end; password++)
+  {
+    if (*password == ' ' || *password == '\t')
+      continue;
+    tmp= (ulong) (unsigned char) *password;
+    nr^= (((nr & 63)+add)*tmp)+ (nr << 8);
+    nr2+=(nr2 << 8) ^ nr;
+    add+=tmp;
+  }
+  result[0]=nr & (((ulong) 1L << 31) -1L);
+  result[1]=nr2 & (((ulong) 1L << 31) -1L);
+}
+
+CalpontSystemCatalog::ColType Func_encode::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
+{
+    return resultType;
+}
+
+string Func_encode::getStrVal(rowgroup::Row& row,
+                           FunctionParm& parm,
+                           bool& isNull,
+                           CalpontSystemCatalog::ColType&)
+{
+
+
+    const string& str = parm[0]->data()->getStrVal(row, isNull);
+    if (isNull)
+    {
+        return "";
+    }
+    const string& password = parm[1]->data()->getStrVal(row, isNull);
+    if (isNull)
+    {
+        return "";
+    }
+
+    int nStrLen = str.length();
+    int nPassLen = password.length();
+    char res[nStrLen+1];
+    memset(res,0,nStrLen+1);
+
+    if (!fSeeded)
+    {
+        hash_password(fSeeds, password.c_str(), nPassLen);
+        sql_crypt.init(fSeeds);
+        fSeeded = true;
+    }
+
+    memcpy(res,str.c_str(),nStrLen);
+    sql_crypt.encode(res,nStrLen);
+    sql_crypt.reinit();
+
+    return res;
+}
+
+}

utils/funcexp/funcexp.cpp

@@ -111,9 +111,11 @@ FuncExp::FuncExp()
     fFuncMap["dayofmonth"] = new Func_day();	//dlh
     fFuncMap["dayofweek"] = new Func_dayofweek();	//dlh
     fFuncMap["dayofyear"] = new Func_dayofyear();	//dlh
+    fFuncMap["decode"] = new Func_decode(); // BT
     fFuncMap["degrees"] = new Func_degrees();
     fFuncMap["DIV"] = new Func_div(); // MySQL use upper case for this function name
     fFuncMap["elt"] = new Func_elt();
+    fFuncMap["encode"] = new Func_encode(); // BT
     fFuncMap["exp"] = new Func_exp();
     fFuncMap["extract"] = new Func_extract();	//dlh
     fFuncMap["find_in_set"] = new Func_find_in_set();

utils/funcexp/functor_str.h

@@ -24,6 +24,7 @@
 #define FUNCTOR_STR_H
 
 #include "functor.h"
+#include "sql_crypt.h"
 
 namespace funcexp
 {
@@ -882,6 +883,64 @@ public:
                           execplan::CalpontSystemCatalog::ColType& op_ct);
 };
 
+/** @brief Func_encode class
+  */
+
+class Func_encode : public Func_Str
+{
+public:
+    Func_encode() : Func_Str("encode") , fSeeded(false) , fSeeds{0,0}  {}
+    virtual ~Func_encode() {}
+
+    execplan::CalpontSystemCatalog::ColType operationType(FunctionParm& fp, execplan::CalpontSystemCatalog::ColType& resultType);
+
+    std::string getStrVal(rowgroup::Row& row,
+                          FunctionParm& fp,
+                          bool& isNull,
+                          execplan::CalpontSystemCatalog::ColType& op_ct);
+
+    void resetSeed()
+    {
+        fSeeded = false;
+        fSeeds[0] = 0;
+        fSeeds[1] = 0;
+    }
+private:
+    void hash_password(ulong *result, const char *password, uint password_len);
+    bool fSeeded;
+    SQL_CRYPT sql_crypt;
+    ulong fSeeds[2];
+};
+
+/** @brief Func_encode class
+  */
+
+class Func_decode : public Func_Str
+{
+public:
+    Func_decode() : Func_Str("decode") , fSeeded(false) , fSeeds{0,0} {}
+    virtual ~Func_decode() {}
+
+    execplan::CalpontSystemCatalog::ColType operationType(FunctionParm& fp, execplan::CalpontSystemCatalog::ColType& resultType);
+
+    std::string getStrVal(rowgroup::Row& row,
+                          FunctionParm& fp,
+                          bool& isNull,
+                          execplan::CalpontSystemCatalog::ColType& op_ct);
+
+    void resetSeed()
+    {
+        fSeeded = false;
+        fSeeds[0] = 0;
+        fSeeds[1] = 0;
+    }
+private:
+  void hash_password(ulong *result, const char *password, uint password_len);
+  bool fSeeded;
+  SQL_CRYPT sql_crypt;
+  ulong fSeeds[2];
+};
+
 }
 
 #endif

utils/funcexp/sql_crypt.cpp

@@ -0,0 +1,56 @@
+#include <cstdlib>
+#include <string>
+using namespace std;
+
+#include "sql_crypt.h"
+
+namespace funcexp
+{
+
+void SQL_CRYPT::init(ulong *rand_nr)
+{
+  uint i;
+  my_rnd_init(&rand,rand_nr[0],rand_nr[1]);
+
+  for (i=0 ; i<=255; i++)
+   decode_buff[i]= (char) i;
+
+  for (i=0 ; i<= 255 ; i++)
+  {
+    int idx= (uint) (my_rnd(&rand)*255.0);
+    char a= decode_buff[idx];
+    decode_buff[idx]= decode_buff[i];
+    decode_buff[+i]=a;
+  }
+  for (i=0 ; i <= 255 ; i++)
+   encode_buff[(unsigned char) decode_buff[i]]=i;
+  org_rand=rand;
+  shift=0;
+}
+
+
+void SQL_CRYPT::encode(char *str,uint length)
+{
+  for (uint i=0; i < length; i++)
+  {
+    shift^=(uint) (my_rnd(&rand)*255.0);
+    uint idx= (uint) (unsigned char) str[0];
+    *str++ = (char) ((unsigned char) encode_buff[idx] ^ shift);
+    shift^= idx;
+  }
+}
+
+
+void SQL_CRYPT::decode(char *str,uint length)
+{
+  for (uint i=0; i < length; i++)
+  {
+    shift^=(uint) (my_rnd(&rand)*255.0);
+    uint idx= (uint) ((unsigned char) str[0] ^ shift);
+    *str = decode_buff[idx];
+    shift^= (uint) (unsigned char) *str++;
+  }
+}
+
+}
+

utils/funcexp/sql_crypt.h

@@ -0,0 +1,40 @@
+#ifndef _SQL_CRYPT_H_
+#define _SQL_CRYPT_H_
+
+//#include "my_global.h"
+/* Macros to make switching between C and C++ mode easier */
+#ifdef __cplusplus
+#define C_MODE_START    extern "C" {
+#define C_MODE_END  }
+#else
+#define C_MODE_START
+#define C_MODE_END
+#endif
+#include "my_rnd.h"
+
+namespace funcexp
+{
+
+class SQL_CRYPT
+{
+  struct my_rnd_struct rand,org_rand;
+  char decode_buff[256],encode_buff[256];
+  uint shift;
+
+ public:
+  SQL_CRYPT() {}
+  SQL_CRYPT(ulong *seed)
+  {
+    init(seed);
+  }
+  ~SQL_CRYPT() {}
+  void init(ulong *seed);
+  void reinit() { shift=0; rand=org_rand; }
+  void encode(char *str, uint length);
+  void decode(char *str, uint length);
+};
+
+}
+
+
+#endif /* _SQL_CRYPT_H_ */