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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 <stdlib.h>
#include <ctype.h>
#include <drizzled/mysql_priv.h>
#include <drizzled/plugin.h>
#include <openssl/md5.h>
bool udf_init_md5udf(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
/* initid->ptr keeps state for between udf_init_foo and udf_deinit_foo */
initid->ptr= NULL;
if (args->arg_count != 1)
{
strcpy(message,"MD5() requires one arguments");
return 1;
}
if (args->arg_type[0] != STRING_RESULT)
{
strcpy(message,"MD5() requires a string");
return 1;
}
return 0;
}
char *udf_doit_md5(UDF_INIT *initid, UDF_ARGS *args, char *result,
unsigned long *length, char *is_null, char *error)
{
MD5_CTX context;
uchar digest[16];
(void)initid;
MD5_Init(&context);
MD5_Update(&context, args->args[0], args->lengths[0]);
MD5_Final(digest, &context);
sprintf(result,
"%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]);
*length= 32;
/* is_null is already zero, this is a demonstration */
*is_null= 0;
/* error is already zero, this is a demonstration */
*error= 0;
return result;
}
void udf_deinit_md5udf(UDF_INIT *initid)
{
(void)initid;
/* if we allocated initid->ptr, free it here */
return;
}
static int md5udf_plugin_init(void *p)
{
udf_func *udff= (udf_func *) p;
static char md5str[4];
strcpy(md5str, "md5");
udff->name.str= md5str;
udff->name.length= strlen("md5");
udff->type= UDFTYPE_FUNCTION;
udff->returns= STRING_RESULT;
udff->func_init= udf_init_md5udf;
udff->func_deinit= udf_deinit_md5udf;
udff->func= (Udf_func_any) udf_doit_md5;
return 0;
}
static int md5udf_plugin_deinit(void *p)
{
udf_func *udff = (udf_func *) p;
(void)udff;
return 0;
}
mysql_declare_plugin(md5)
{
MYSQL_UDF_PLUGIN,
"md5",
"1.0",
"Stewart Smith",
"UDF for computing md5sum",
PLUGIN_LICENSE_GPL,
md5udf_plugin_init, /* Plugin Init */
md5udf_plugin_deinit, /* Plugin Deinit */
NULL, /* status variables */
NULL, /* system variables */
NULL /* config options */
}
mysql_declare_plugin_end;
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