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/* Copyright (C) 2006 MySQL 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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include <drizzled/server_includes.h>
#include <drizzled/sql_udf.h>
#include <drizzled/item/func.h>
#include <drizzled/function/str/strfunc.h>
#include <openssl/md5.h>
#include <stdio.h>
using namespace std;
class Item_func_md5 : public Item_str_func
{
public:
Item_func_md5() : Item_str_func() {}
const char *func_name() const { return "md5"; }
String *val_str(String*);
void fix_length_and_dec() {
max_length=32;
args[0]->collation.set(
get_charset_by_csname(args[0]->collation.collation->csname,
MY_CS_BINSORT), DERIVATION_COERCIBLE);
}
};
String *Item_func_md5::val_str(String *str)
{
assert(fixed == 1);
String * sptr= args[0]->val_str(str);
str->set_charset(&my_charset_bin);
if (sptr)
{
MD5_CTX context;
unsigned char digest[16];
null_value=0;
MD5_Init (&context);
MD5_Update (&context,(unsigned char *) sptr->ptr(), sptr->length());
MD5_Final (digest, &context);
if (str->alloc(32)) // Ensure that memory is free
{
null_value=1;
return 0;
}
snprintf((char *) str->ptr(), 33,
"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
digest[0], digest[1], digest[2], digest[3],
digest[4], digest[5], digest[6], digest[7],
digest[8], digest[9], digest[10], digest[11],
digest[12], digest[13], digest[14], digest[15]);
str->length((uint) 32);
return str;
}
null_value=1;
return 0;
}
Create_function<Item_func_md5> md5udf(string("md5"));
static int md5udf_plugin_init(PluginRegistry ®istry)
{
registry.add(&md5udf);
return 0;
}
drizzle_declare_plugin(md5)
{
"md5",
"1.0",
"Stewart Smith",
"UDF for computing md5sum",
PLUGIN_LICENSE_GPL,
md5udf_plugin_init, /* Plugin Init */
NULL, /* Plugin Deinit */
NULL, /* status variables */
NULL, /* system variables */
NULL /* config options */
}
drizzle_declare_plugin_end;
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