1/*
2 * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29/*
30	File:		prngpriv.h
31
32	Contains:	Private typedefs and #defines for Counterpane Yarrow PRNG.
33
34	Written by:	Counterpane, Inc.
35
36	Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
37
38	Change History (most recent first):
39
40		02/10/99	dpm		Created, based on Counterpane source.
41
42*/
43/*
44	prngpriv.h
45
46	Completely private header for the Counterpane PRNG. Should only be included by prng.c
47*/
48
49#ifndef __YARROW_PRNG_PRIV_H__
50#define __YARROW_PRNG_PRIV_H__
51
52#include "userdefines.h"
53#include "dev/random/YarrowCoreLib/include/yarrow.h"
54#include "entropysources.h"
55#include "comp.h"
56#include "sha1mod.h"
57#include "smf.h"
58
59#define TOTAL_SOURCES ENTROPY_SOURCES+USER_SOURCES
60
61#ifdef COMPRESSION_ON
62#define COMP_SOURCES TOTAL_SOURCES
63#else
64#define COMP_SOURCES ENTROPY_SOURCES
65#endif
66
67/* Error numbers */
68typedef enum prng_ready_status {
69	PRNG_READY = 33,	/* Compiler will initialize to either 0 or random if allowed to */
70	PRNG_NOT_READY = 0
71} prng_ready_status;
72
73/* Top level output state */
74typedef struct{
75	BYTE IV[20];
76	BYTE out[20];
77	UINT index;			/* current byte to output */
78	UINT numout;		/* bytes since last prng_make_new_state */
79} GEN_CTX;
80
81/* PRNG state structure */
82struct PRNG {
83	/* Output State */
84	GEN_CTX outstate;
85
86	/* Entropy Pools (somewhat unlike a gene pool) */
87	YSHA1_CTX pool;
88	UINT poolSize[TOTAL_SOURCES];			/* Note that size is in bytes and est in bits */
89	UINT poolEstBits[TOTAL_SOURCES];
90	COMP_CTX comp_state[COMP_SOURCES];
91
92	/* Status Flags */
93	prng_ready_status ready;
94};
95
96/*
97 * Clients see an opaque PrngRef; internal code uses the
98 * following typedef.
99 */
100typedef struct PRNG PRNG;
101
102
103/* Test Macros */
104#define CHECKSTATE(p) \
105if(p==NULL) {return PRNG_ERR_NOT_READY;} /* Does the state exist? */	\
106if(p->ready != PRNG_READY) {return PRNG_ERR_NOT_READY;}	/* Set error state and return */
107/* To make sure that a pointer isn't NULL */
108#define PCHECK(ptr)  if(ptr==NULL) {return PRNG_ERR_NULL_POINTER;}
109/* To make sure that malloc returned a valid value */
110#define MCHECK(ptr)  if(ptr==NULL) {return PRNG_ERR_LOW_MEMORY;}
111/* To make sure that a given value is non-negative */
112#if		defined(macintosh) || defined(__APPLE__)
113/* original looks like a bogon */
114#define ZCHECK(val)  if(val<0) {return PRNG_ERR_OUT_OF_BOUNDS;}
115#else
116#define ZCHECK(val)  if(p<0) {return PRNG_ERR_OUT_OF_BOUNDS;}
117#endif	/* macintosh */
118/* To make sure that the generator state is valid */
119#define GENCHECK(p) if(p->outstate.index>20) {return PRNG_ERR_OUT_OF_BOUNDS;} /* index is unsigned */
120/* To make sure that the entropy pool is valid */
121#define POOLCHECK(p) /* */
122
123
124#endif
125