Source code upload

eoe/cmd/sss/ssdb/ssdbserver/sql/sql_crypt.cc

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+/* Copyright (C) 1998 TcX AB & Monty Program KB & Detron HB
+
+   This software is distributed with NO WARRANTY OF ANY KIND.  No author or
+   distributor accepts any responsibility for the consequences of using it, or
+   for whether it serves any particular purpose or works at all, unless he or
+   she says so in writing.  Refer to the Free Public License (the "License")
+   for full details.
+
+   Every copy of this file must include a copy of the License, normally in a
+   plain ASCII text file named PUBLIC.	The License grants you the right to
+   copy, modify and redistribute this file, but only under certain conditions
+   described in the License.  Among other things, the License requires that
+   the copyright notice and this notice be preserved on all copies. */
+
+
+/*
+ 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 index= (uint) (rnd(&rand)*255.0);
+    char a= decode_buff[index];
+    decode_buff[index]= 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 < (int) length; i++)
+  {
+    shift^=(uint) (rnd(&rand)*255.0);
+    uint index= (uint) (uchar) str[0];
+    *str++ = (char) ((uchar) encode_buff[index] ^ shift);
+    shift^= index;
+  }
+}
+
+
+void SQL_CRYPT::decode(char *str,uint length)
+{
+  for (uint i=0; i < length; i++)
+  {
+    shift^=(uint) (rnd(&rand)*255.0);
+    uint index= (uint) ((unsigned char) str[0] ^ shift);
+    *str = decode_buff[index];
+    shift^= (uint) (uchar) *str++;
+  }
+}