AmpereMeter - Example self-announcing webserver which controls …

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Dirk-Willem van Gulik (NXP/mbed) / Mbed 2 deprecated AmpereMeter

Example self-announcing webserver which controls a servo through a smallHTML userinterface.

services/mysql/mycrypt.c@0:a259777c45a3, 2010-08-14 (annotated)

Committer:: dirkx
Date:: Sat Aug 14 15:56:01 2010 +0000
Revision:: 0:a259777c45a3

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User	Revision	Line number	New contents of line
dirkx	0:a259777c45a3	1	/* Copyright (C) 2007 MySQL AB & Michael Widenius
dirkx	0:a259777c45a3	2
dirkx	0:a259777c45a3	3	This program is free software; you can redistribute it and/or modify
dirkx	0:a259777c45a3	4	it under the terms of the GNU General Public License as published by
dirkx	0:a259777c45a3	5	the Free Software Foundation; version 2 of the License.
dirkx	0:a259777c45a3	6
dirkx	0:a259777c45a3	7	This program is distributed in the hope that it will be useful,
dirkx	0:a259777c45a3	8	but WITHOUT ANY WARRANTY; without even the implied warranty of
dirkx	0:a259777c45a3	9	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dirkx	0:a259777c45a3	10	GNU General Public License for more details.
dirkx	0:a259777c45a3	11
dirkx	0:a259777c45a3	12	You should have received a copy of the GNU General Public License
dirkx	0:a259777c45a3	13	along with this program; if not, write to the Free Software
dirkx	0:a259777c45a3	14	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
dirkx	0:a259777c45a3	15
dirkx	0:a259777c45a3	16	#define SCRAMBLE_LENGTH_323 8
dirkx	0:a259777c45a3	17
dirkx	0:a259777c45a3	18	#include <string.h>
dirkx	0:a259777c45a3	19	#include <math.h>
dirkx	0:a259777c45a3	20
dirkx	0:a259777c45a3	21	typedef unsigned int uint;
dirkx	0:a259777c45a3	22	typedef unsigned long ulong;
dirkx	0:a259777c45a3	23	typedef unsigned char uchar;
dirkx	0:a259777c45a3	24
dirkx	0:a259777c45a3	25	struct my_rnd_struct {
dirkx	0:a259777c45a3	26	unsigned long seed1,seed2,max_value;
dirkx	0:a259777c45a3	27	double max_value_dbl;
dirkx	0:a259777c45a3	28	};
dirkx	0:a259777c45a3	29
dirkx	0:a259777c45a3	30	static void my_rnd_init(struct my_rnd_struct *rand_st, ulong seed1, ulong seed2);
dirkx	0:a259777c45a3	31	static double my_rnd(struct my_rnd_struct *rand_st);
dirkx	0:a259777c45a3	32	static void hash_password(ulong result, const char password, uint password_len);
dirkx	0:a259777c45a3	33
dirkx	0:a259777c45a3	34	/*
dirkx	0:a259777c45a3	35	Initialize random generator
dirkx	0:a259777c45a3	36
dirkx	0:a259777c45a3	37	NOTES
dirkx	0:a259777c45a3	38	MySQL's password checks depends on this, so don't do any changes
dirkx	0:a259777c45a3	39	that changes the random numbers that are generated!
dirkx	0:a259777c45a3	40	*/
dirkx	0:a259777c45a3	41
dirkx	0:a259777c45a3	42	static void my_rnd_init(struct my_rnd_struct *rand_st, ulong seed1, ulong seed2)
dirkx	0:a259777c45a3	43	{
dirkx	0:a259777c45a3	44	rand_st->max_value= 0x3FFFFFFFL;
dirkx	0:a259777c45a3	45	rand_st->max_value_dbl=(double) rand_st->max_value;
dirkx	0:a259777c45a3	46	rand_st->seed1=seed1%rand_st->max_value ;
dirkx	0:a259777c45a3	47	rand_st->seed2=seed2%rand_st->max_value;
dirkx	0:a259777c45a3	48	}
dirkx	0:a259777c45a3	49
dirkx	0:a259777c45a3	50	/*
dirkx	0:a259777c45a3	51	Generate random number.
dirkx	0:a259777c45a3	52
dirkx	0:a259777c45a3	53	SYNOPSIS
dirkx	0:a259777c45a3	54	my_rnd()
dirkx	0:a259777c45a3	55	rand_st INOUT Structure used for number generation
dirkx	0:a259777c45a3	56
dirkx	0:a259777c45a3	57	RETURN VALUE
dirkx	0:a259777c45a3	58	generated pseudo random number
dirkx	0:a259777c45a3	59	*/
dirkx	0:a259777c45a3	60
dirkx	0:a259777c45a3	61	static double my_rnd(struct my_rnd_struct *rand_st)
dirkx	0:a259777c45a3	62	{
dirkx	0:a259777c45a3	63	rand_st->seed1=(rand_st->seed1*3+rand_st->seed2) % rand_st->max_value;
dirkx	0:a259777c45a3	64	rand_st->seed2=(rand_st->seed1+rand_st->seed2+33) % rand_st->max_value;
dirkx	0:a259777c45a3	65	return (((double) rand_st->seed1)/rand_st->max_value_dbl);
dirkx	0:a259777c45a3	66	}
dirkx	0:a259777c45a3	67
dirkx	0:a259777c45a3	68	/*
dirkx	0:a259777c45a3	69	Generate binary hash from raw text string
dirkx	0:a259777c45a3	70	Used for Pre-4.1 password handling
dirkx	0:a259777c45a3	71	SYNOPSIS
dirkx	0:a259777c45a3	72	hash_password()
dirkx	0:a259777c45a3	73	result OUT store hash in this location
dirkx	0:a259777c45a3	74	password IN plain text password to build hash
dirkx	0:a259777c45a3	75	password_len IN password length (password may be not null-terminated)
dirkx	0:a259777c45a3	76	*/
dirkx	0:a259777c45a3	77
dirkx	0:a259777c45a3	78	static void hash_password(ulong result, const char password, uint password_len)
dirkx	0:a259777c45a3	79	{
dirkx	0:a259777c45a3	80	register ulong nr=1345345333L, add=7, nr2=0x12345671L;
dirkx	0:a259777c45a3	81	ulong tmp;
dirkx	0:a259777c45a3	82	const char *password_end= password + password_len;
dirkx	0:a259777c45a3	83	for (; password < password_end; password++)
dirkx	0:a259777c45a3	84	{
dirkx	0:a259777c45a3	85	if (password == ' ' \|\| password == '\t')
dirkx	0:a259777c45a3	86	continue; /* skip space in password */
dirkx	0:a259777c45a3	87	tmp= (ulong) (uchar) *password;
dirkx	0:a259777c45a3	88	nr^= (((nr & 63)+add)*tmp)+ (nr << 8);
dirkx	0:a259777c45a3	89	nr2+=(nr2 << 8) ^ nr;
dirkx	0:a259777c45a3	90	add+=tmp;
dirkx	0:a259777c45a3	91	}
dirkx	0:a259777c45a3	92	result[0]=nr & (((ulong) 1L << 31) -1L); /* Don't use sign bit (str2int) */;
dirkx	0:a259777c45a3	93	result[1]=nr2 & (((ulong) 1L << 31) -1L);
dirkx	0:a259777c45a3	94	}
dirkx	0:a259777c45a3	95
dirkx	0:a259777c45a3	96
dirkx	0:a259777c45a3	97
dirkx	0:a259777c45a3	98	/*
dirkx	0:a259777c45a3	99	Scramble string with password.
dirkx	0:a259777c45a3	100	Used in pre 4.1 authentication phase.
dirkx	0:a259777c45a3	101	SYNOPSIS
dirkx	0:a259777c45a3	102	scramble_323()
dirkx	0:a259777c45a3	103	to OUT Store scrambled message here. Buffer must be at least
dirkx	0:a259777c45a3	104	SCRAMBLE_LENGTH_323+1 bytes long
dirkx	0:a259777c45a3	105	message IN Message to scramble. Message must be at least
dirkx	0:a259777c45a3	106	SRAMBLE_LENGTH_323 bytes long.
dirkx	0:a259777c45a3	107	password IN Password to use while scrambling
dirkx	0:a259777c45a3	108	*/
dirkx	0:a259777c45a3	109
dirkx	0:a259777c45a3	110	void scramble_323(char to, const char message, const char *password)
dirkx	0:a259777c45a3	111	{
dirkx	0:a259777c45a3	112	struct my_rnd_struct rand_st;
dirkx	0:a259777c45a3	113	ulong hash_pass[2], hash_message[2];
dirkx	0:a259777c45a3	114
dirkx	0:a259777c45a3	115	if (password && password[0])
dirkx	0:a259777c45a3	116	{
dirkx	0:a259777c45a3	117	char extra, *to_start=to;
dirkx	0:a259777c45a3	118	const char *message_end= message + SCRAMBLE_LENGTH_323;
dirkx	0:a259777c45a3	119	hash_password(hash_pass,password, (uint) strlen(password));
dirkx	0:a259777c45a3	120	hash_password(hash_message, message, SCRAMBLE_LENGTH_323);
dirkx	0:a259777c45a3	121	my_rnd_init(&rand_st,hash_pass[0] ^ hash_message[0],
dirkx	0:a259777c45a3	122	hash_pass[1] ^ hash_message[1]);
dirkx	0:a259777c45a3	123	for (; message < message_end; message++)
dirkx	0:a259777c45a3	124	to++= (char) (floor(my_rnd(&rand_st)31)+64);
dirkx	0:a259777c45a3	125	extra=(char) (floor(my_rnd(&rand_st)*31));
dirkx	0:a259777c45a3	126	while (to_start != to)
dirkx	0:a259777c45a3	127	*(to_start++)^=extra;
dirkx	0:a259777c45a3	128	}
dirkx	0:a259777c45a3	129	*to= 0;
dirkx	0:a259777c45a3	130	}
dirkx	0:a259777c45a3	131

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	14 Aug 2010
Imports:	49
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	1

services/mysql/mycrypt.c@0:a259777c45a3, 2010-08-14 (annotated)

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