1 files changed, 82 insertions, 0 deletions
diff --git a/sql/sql_crypt.cc b/sql/sql_crypt.cc
new file mode 100644
index 00000000000..371d63f8c73
--- /dev/null
+++ b/sql/sql_crypt.cc
@@ -0,0 +1,82 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+
+
+/*
+ Functions to handle the encode() and decode() functions
+ The strongness of this crypt is large based on how good the random
+ generator is.	It should be ok for short strings, but for communication one
+ needs something like 'ssh'.
+*/
+
+#ifdef __GNUC__
+#pragma implementation				// gcc: Class implementation
+#endif
+
+#include "mysql_priv.h"
+
+SQL_CRYPT::SQL_CRYPT(const char *password)
+{
+  ulong rand_nr[2];
+  hash_password(rand_nr,password);
+  crypt_init(rand_nr);
+}
+
+void SQL_CRYPT::crypt_init(ulong *rand_nr)
+{
+  uint i;
+  randominit(&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) (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) (rnd(&rand)*255.0);
+    uint idx= (uint) (uchar) str[0];
+    *str++ = (char) ((uchar) encode_buff[idx] ^ shift);
+    shift^= idx;
+  }
+}
+
+
+void SQL_CRYPT::decode(char *str,uint length)
+{
+  for (uint i=0; i < length; i++)
+  {
+    shift^=(uint) (rnd(&rand)*255.0);
+    uint idx= (uint) ((unsigned char) str[0] ^ shift);
+    *str = decode_buff[idx];
+    shift^= (uint) (uchar) *str++;
+  }
+}