Last active
February 27, 2018 20:26
-
-
Save BrianLeishman/d7903a4acba75707c05fc581e1c714c3 to your computer and use it in GitHub Desktop.
MySQL UDF for generating SHA3 hashes without hex encoding (much faster)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
* Copyright (c) 2018, brian | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* | |
* * Redistributions of source code must retain the above copyright notice, this | |
* list of conditions and the following disclaimer. | |
* * Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
* POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
/* | |
* File: unhex_unhex_sha3.c | |
* Author: brian | |
* | |
* Created on February 26, 2018, 9:26 AM | |
*/ | |
/* | |
* USAGE INSTRUCTIONS: | |
* | |
* make sure libmysqlclient-dev and rhash is installed: | |
* apt install libmysqlclient-dev rhash librhash-dev | |
* | |
* Replace "/usr/lib/mysql/plugin" with your MySQL plugins directory (can be found by running "select @@plugin_dir;") | |
* gcc -I/usr/include/mysql -o unhex_sha3.so -shared unhex_sha3.c -lrhash -fPIC -O2 && cp unhex_sha3.so /usr/lib/mysql/plugin/unhex_sha3.so | |
* | |
* Then, on the server: | |
* create function`unhex_sha3`returns string soname'unhex_sha3.so'; | |
* | |
* And use/test like: | |
* select`unhex_sha3`('yeet',224); | |
* | |
* Note: this function is intended to work EXACTLY like the native unhex(sha2()) functions, | |
* with the same argument order, but this is for both functions, so this function | |
* returns the non-hex encoded output, e.g. a 224 bit hash will return 28 (most likely) unprintable bytes, | |
* instead of the 56 printable bytes. | |
* | |
* Store in a BINARY(28) column type! | |
* | |
* Yeet! | |
* | |
*/ | |
#ifdef STANDARD | |
/* STANDARD is defined, don't use any mysql functions */ | |
#include <string.h> | |
#ifdef __WIN__ | |
typedef unsigned __int64 ulonglong; /* Microsofts 64 bit types */ | |
typedef __int64 longlong; | |
#else | |
typedef unsigned long long ulonglong; | |
typedef long long longlong; | |
#endif /*__WIN__*/ | |
#else | |
#include <my_global.h> | |
#include <my_sys.h> | |
#if defined(MYSQL_SERVER) | |
#include <m_string.h> | |
#else | |
/* when compiled as standalone */ | |
#include <string.h> | |
#endif | |
#endif | |
#include <mysql.h> | |
#include <rhash.h> | |
#ifdef HAVE_DLOPEN | |
my_bool unhex_sha3_init(UDF_INIT *initid, UDF_ARGS *args, char *message); | |
void unhex_sha3_deinit(UDF_INIT *initid); | |
char *unhex_sha3(UDF_INIT *initid __attribute__ ((unused)), UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *message __attribute__ ((unused))); | |
my_bool unhex_sha3_init(UDF_INIT *initid, UDF_ARGS *args, char *message) { | |
if (args->arg_count != 2) { | |
strcpy(message, "`unhex_sha3`() requires 2 parameters: the message part, and the bits"); | |
return 1; | |
} | |
args->arg_type[1] = INT_RESULT; | |
initid->maybe_null = 1; //can return null | |
return 0; | |
} | |
char *unhex_sha3(UDF_INIT *initid __attribute__ ((unused)), UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *message __attribute__ ((unused))) { | |
long long int_val; | |
int_val = *((long long*) args->args[1]); | |
if (int_val == 0) { | |
int_val = 256; | |
} | |
if (args->args[0] == NULL || args->args[1] == NULL || | |
(int_val != 224 && int_val != 256 && int_val != 384 && int_val != 512)) { | |
*is_null = 1; | |
return 0; | |
} | |
unsigned long len = int_val / 8; | |
unsigned char *hash = malloc(sizeof (char) * (len)); | |
unsigned hash_id; | |
switch (int_val) { | |
case 224: | |
hash_id = RHASH_SHA3_224; | |
break; | |
case 256: | |
hash_id = RHASH_SHA3_256; | |
break; | |
case 384: | |
hash_id = RHASH_SHA3_384; | |
break; | |
case 512: | |
hash_id = RHASH_SHA3_512; | |
break; | |
} | |
if (rhash_msg(hash_id, args->args[0], args->lengths[0], hash)) { | |
*is_null = 1; | |
return 0; | |
} | |
*length = len; | |
return hash; | |
} | |
#endif /* HAVE_DLOPEN */ |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment