X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/Security/libsecurity_comcryption/lib/comcryptPriv.h

diff --git a/Security/libsecurity_comcryption/lib/comcryptPriv.h b/Security/libsecurity_comcryption/lib/comcryptPriv.h
deleted file mode 100644
index d99c9637..00000000
--- a/Security/libsecurity_comcryption/lib/comcryptPriv.h
+++ /dev/null
@@ -1,492 +0,0 @@
-/*
- * Copyright (c) 1997,2011,2014 Apple Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-#ifndef	_COMCRYPT_PRIV_H_
-#define	_COMCRYPT_PRIV_H_
-
-#include "comcryption.h"
-#include "comDebug.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern comMallocExternFcn *comMallocExt;
-extern comFreeExternFcn *comFreeExt;
-
-/*
- * type of element in comcryptBuf.queue[]. Making this an unsigned int gives
- * a slight performance improvement on the i486 platform, but it does use up
- * more memory.
- */
-typedef unsigned queueElt;
-
-/*
- * Enable queue lookahead via comcryptBuf.lookAhead[]. This is currently
- * just the default value for comcryptBuf.laEnable.
- */
-#define QUEUE_LOOKAHEAD		1
-
-/*
- * lookahead queue is bit array if 1, else byte array.
- * FIXME - this will most likely be a hard-coded 1 for Mac and
- * dynamically configurable for other platforms.
- */
-#define QUEUE_LOOKAHEAD_BIT	1
-
-/*
- * Size of lookAhead buffer in bytes.
- */
-#if		QUEUE_LOOKAHEAD_BIT
-/*
- * 1 bit per potential queueElt value.
- */
-#define LOOKAHEAD_SIZE		(1 << ((2 * 8) - 3))
-#else	/* QUEUE_LOOKAHEAD_BIT */
-/*
- * One byte per queueElt value; avoids shifts and masks in accessing
- * array elements at the cost of additional memory.
- */
-#define LOOKAHEAD_SIZE		(1 << (2 * 8))
-#endif	/* QUEUE_LOOKAHEAD_BIT */
-
-/*
- * When true, optimize away the cost of the keynybble() call on a hit
- * on queue[0].
- */
-#define SKIP_NIBBLE_ON_QUEUE_0		1
-
-/*
- * pre-malloc'd buffers, one per level of comcryption. This allows each level
- * to maintain its own queue state machine as well as its own comcryption
- * parameters.
- */
-typedef struct _comcryptBuf {
-	queueElt 					*queue;			// mallocd, QLEN elements
-	unsigned					nybbleDex;		// index for keynybble()
-	struct _comcryptBuf			*nextBuf;		// for recursion
-
-	/*
-	 * Used to temporarily store bytecode fragments during comcryption and
-	 * partial blocks during decomcryption.
-	 */
-	unsigned char				*codeBuf;
-	unsigned					codeBufSize;	// malloc'd size of codeBuf
-	unsigned					codeBufLength;	// valid bytes in codeBuf
-
-	/*
-	 * Buffer for two-level comcryption. During comcryption, 2nd level
-	 * comcrypted bytecode is placed here. During decomcryption, the result
-	 * of decomcrytping the 2nd level bytecode is placed here.
-	 */
-	unsigned char				*level2Buf;
-	unsigned					level2BufSize;	// malloc'd size of level2Buf
-
-	/*
-	 * comcryption parameters, may (eventually) be different for different
-	 * levels. Tweakable, for now, only via private API in comDebug.h.
-	 */
-	unsigned					f1;
-	unsigned					f2;
-	unsigned					jmatchThresh;	// max avg jmatch for 2 level
-	unsigned					minByteCode;	// min numByteCodes for 2 level
-
-	/*
-	 * Bit map, one bit per potential value in queue[]; 1 means "this value
-	 * is somewhere in queue[]"
-	 */
-	unsigned char				*lookAhead;
-
-	/*
-	 * Signature Sequence array - to be Xord with ciphertext
-	 * size = MAX_TOKENS
-	 */
-	unsigned					*sigArray;
-} comcryptBuf;
-
-
-/*
- * Private struct associated with client's comcryptObj.
- */
-typedef struct {
-	unsigned char 			*key;
-	unsigned 				keybytes;			// valid bytes in *key
-	comcryptOptimize 		optimize;			// CCO_SIZE, etc.
-	unsigned char 			*map;
-	unsigned char 			*invmap;
-	unsigned				version;			// from ciphertext
-	unsigned				versionBytes;		// valid bytes in version;
-												//   also nonzero on comcrypt
-												//   means version has been
-												//   written
-	unsigned				spareBytes;			// # ciphertext header spare
-												//   bytes skipped
-	comcryptBuf				cbuf;
-
-	/*
-	 * To save a tiny bit of memory, these could/should be bits, but
-	 * we examine some of them on every code word, so we'll expand them into
-	 * bytes...
-	 */
-	unsigned char				laEnable;		// lookahead enable
-	unsigned char				sigSeqEnable;	// signature sequence enable
-	unsigned char				level2enable;	// 2-level comcryption
-
-} comcryptPriv;
-
-
-/*
- * Block and buffer sizes. Subject to tweaking...
- */
-#define CC_BLOCK_SIZE		256						/* bytes of plaintext */
-
-/*
- * For comcryptMaxInBufSize(CCOP_COMCRYPT), if outBufSize exceeds this
- * threshhold, truncate the max inBufSize so that
- * inBufSize = 0 mod CC_BLOCK_SIZE.
- */
-#define INBUF_TRUNC_THRESH	(16 * 1024)
-
-/*
- * Macros to calculate number of token bits and bytes associated with
- * a quantity of plaintext (in bytes)
- */
-#define TOKEN_BITS_FROM_PTEXT(pt)			((pt + 1) >> 1)
-#define TOKEN_BYTES_FROM_PTEXT(pt)			((pt + 15) >> 4)
-#define TOKEN_BYTES_FROM_TOKEN_BITS(tb)		((tb + 7) >> 3)
-
-/*
- * Max number of token bits or code fragments in a block
- */
-#define MAX_TOKENS				(CC_BLOCK_SIZE / 2)
-
-/*
- * Size of comcryptBuf.queue[].
- */
-#define QLEN 					256
-
-/*
- * FIXME - some info on these constants?
- */
-#define F1_DEFAULT				12
-#define F2_DEFAULT				12
-#define ABOVE(F2) 				((F2 * QLEN) >> 4)
-
-/*
- * Constants for obfuscation via signature sequence.
- */
-#define HASH_Q		19
-#define HASH_PRIME 	((1<<HASH_Q)-1)  	/* Must be prime less than 2^19. */
-#define IN_OFFSET	3  					/* Must be in [1,255]. */
-#define OUT_OFFSET 	5 					/* Must be in [1,255]. */
-
-/*
- * Ciphertext structure:
- *
- *   4 bytes of version
- *   4 bytes spare
- *   n blocks, format described below
- */
-#define VERSION_3_Dec_97 		0xc0de0003
-#define VERSION_BYTES			4
-#define SPARE_BYTES				4
-#define	CTEXT_HDR_SIZE			(VERSION_BYTES + SPARE_BYTES)
-
-/*
- * Format of CBD_SINGLE block
- *
- * 		block description (see CBD_xxx, below)
- *		number of longCodes
- *		number of tokens - optional, absent if CBD_FULL_BLOCK
- *		token array
- *		longCode array
- *		byteCode array - length implied from number of longCodes, tokens
- *
- * Format of CBD_DOUBLE block
- *
- * 		block description (see CBD_xxx, below)
- *		number of longCodes
- *		number of tokens - optional, absent if CBD_FULL_BLOCK
- *		token array
- *		longCode array
- *		length of 2nd level comcrypted byte code to follow
- *		2nd level comcrypted byte code array
- */
-
-/*
- * Offsets (block-relative) of ciphertext components. All fields are byte-wide.
- * This limits block size to < 512 (the limiting case is a whole block of
- * bytecodes or a whole block of longcodes). Changing the counts to
- * two bytes would add flexibility and is necessary for block sizes of 512
- * or greater, but it would cost up to 3 bytes per block.
- */
-#define CTBO_BLOCK_DESC			0x00	/* descriptor bits, see below */
-#define CTBO_NUM_LONG_CODES		0x01	/* in 16-bit words */
-
-/*
- * if block[CTBO_BLOCK_DESC] & CBD_FULL_BLOCK, the following byte
- * is deleted (actually, implied) and subsequent fields are moved
- * up one byte. This saves one byte per block for most blocks.
- */
-#define CTBO_NUM_TOKENS			0x02
-
-/*
- * Offsets of remaining fields not constant; they depend on CBD_FULL_BLOCK and
- * CBD_SINGLE/CBD_DOUBLE.
- */
-
-/*
- * Min block size - blockDesc, numLongCodes, numTokens, one token byte,
- * one bytecode
- */
-#define MIN_CBLOCK_SIZE			5	/* min cipherblock size */
-
-/*
- * Max block size - blockDesc, numLongCodes, full block's tokens, and
- * a full block of longcodes
- */
-#define MAX_CBLOCK_SIZE			(2 +				\
-		TOKEN_BYTES_FROM_PTEXT(CC_BLOCK_SIZE) +		\
-		CC_BLOCK_SIZE)
-
-/*
- * Bits in block[CTBO_BLOCK_DESC]
- */
-#define CBD_MAGIC				0xd0	/* high nibble must be 0xd */
-#define CBD_MAGIC_MASK			0xf0
-#define CBD_BLOCK_TYPE_MASK		0x01
-#define	CBD_SINGLE				0x00	/* single-level comcrypt */
-#define CBD_DOUBLE				0x01	/* double-level comcrypt */
-#define CBD_ODD_MASK			0x02
-#define CBD_ODD					0x02	/* last code maps to single */
-										/*   (odd) byte */
-#define CBD_EVEN				0x00
-#define CBD_FULL_BLOCK_MASK		0x04
-#define CBD_FULL_BLOCK			0x04	/* expands to CC_BLOCK_SIZE, also  */
-										/* implies no CTBO_NUM_TOKENS byte
-										 * in block */
-/*
- * Defining this non-zero limits effective key size to 40 bits for export
- */
-#define COMCRYPT_EXPORT_ONLY	0
-#define EXPORT_KEY_SIZE			5		/* in bytes */
-
-/*
- * Threshholds for performing 2-level comcrypt
- */
-#define THRESH_2LEVEL_JMATCH_DEF		40		/* max average jmatch */
-#define THRESH_2LEVEL_NUMBYTECODES_DEF	30		/* min number of bytecodes */
-
-
-/*
- * Private routines in comcryptPriv.c
- */
-extern void key_perm(
-	const unsigned char *key,
-	int 				keybytes,
-	unsigned char 		*map,
-	unsigned char 		*invmap);
-extern int keybyte(
-	const unsigned char *key,
-	int 				keybytes,
-	int 				index);
-extern int keynybble(
-	const unsigned char *key,
-	int 				keybytes,
-	int 				index);
-extern void mallocCodeBufs(comcryptBuf *cbufs);
-extern void freeCodeBufs(comcryptBuf *cbufs);
-extern void initCodeBufs(
-	comcryptBuf *cbuf,
-	const unsigned char *key,
-	unsigned keyLen,
-	unsigned char laEnable,
-	unsigned char sigSeqEnable);
-#if	0
-extern void serializeShort(
-	unsigned short s,
-	unsigned char *buf);
-unsigned short deserializeShort(unsigned char *buf);
-#endif	/*0*/
-void serializeInt(
-	unsigned i,
-	unsigned char *buf);
-unsigned deserializeInt(unsigned char *buf);
-void initSigSequence(comcryptBuf *cbuf,
-	const unsigned char *key,
-	unsigned keyLen);
-void sigMunge(comcryptBuf *cbuf,
-	const unsigned char *tokenPtr,
-	unsigned numTokens,
-	unsigned char *byteCodePtr,
-	unsigned char *longCodePtr);
-#if		0
-void nextSigWord(comcryptBuf *cbuf,
-	unsigned sigDex,			// same as tokenDex
-	unsigned match,
-	unsigned above);
-#endif
-
-#if		COM_LA_DEBUG
-extern int testLookAhead(comcryptBuf *cbuf, int i1, int i2);
-extern int initTestLookAhead(comcryptBuf *cbuf);
-#else	/*COM_LA_DEBUG*/
-#define testLookAhead(cbuf, i1, i2)
-#define initTestLookAhead(cbuf)
-#endif	/* COM_LA_DEBUG */
-
-/*
- * Routines written as macros solely for performance reasons
- */
-
-/*
- * try a couple different mersenne mods...
- */
-#define MOD_HASH(x) { 							\
-	while(x > HASH_PRIME) { 					\
-		x = (x >> HASH_Q) + (x & HASH_PRIME); 	\
-	} 											\
-}
-
-/*
- * Haven't gotten this to work for the Mac yet...
- */
-#ifdef	NeXT
-#define SIG_WORD_INLINE 1
-#else	/*NeXT*/
-#define SIG_WORD_INLINE 0
-#endif
-
-#if		SIG_WORD_INLINE
-
-static inline void nextSigWord(comcryptBuf *cbuf,
-	unsigned sigDex,			// same as tokenDex
-	unsigned match,
-	unsigned above)				// (jabove, keyabove) + nibbleDex
-{
-	unsigned offset;
-	unsigned *sigArray = cbuf->sigArray;
-
-	#if		COM_DEBUG
-	if(sigDex == 0) {
-		printf("nextSigWord underflow\n");
-		exit(1);
-	}
-	if(sigDex > MAX_TOKENS) {
-		printf("nextSigWord overflow\n");
-		exit(1);
-	}
-	#endif
-
-	if(match) {
-		offset = IN_OFFSET;
-	}
-	else {
-		offset = OUT_OFFSET;
-	}
-	sigArray[sigDex] = sigArray[sigDex-1] * (above + offset);
-	MOD_HASH(sigArray[sigDex]);
-}
-
-#else	/*SIG_WORD_INLINE*/
-
-#define nextSigWord(cbuf, sigDex, match, above) {					\
-	unsigned offset = (match ? IN_OFFSET : OUT_OFFSET);				\
-	unsigned *sigArray = cbuf->sigArray;							\
-	unsigned result = (sigArray[sigDex-1] * (above + offset));		\
-	MOD_HASH(result);												\
-	sigArray[sigDex] = result;										\
-}
-
-#endif	/*SIG_WORD_INLINE*/
-
-/*
- * Inline serializeShort(), deserializeShort()
- */
-#define serializeShort(s, buf)  		\
-	buf[0] = (unsigned char)(s >> 8);	\
-	buf[1] = (unsigned char)(s);		\
-
-#define deserializeShort(s, buf)		\
-	s = ((unsigned short)buf[0]) << 8;	\
-	s |= buf[1];						\
-
-
-/*
- * General purpose macros for accessing bit arrays. Used for accessing
- * token bits and lookahead array bits if QUEUE_LOOKAHEAD_BIT = 1.
- */
-#define MARK_BIT_ARRAY(cp, index, val) {						\
-	unsigned char bit = 1 << (index & 7);						\
-	unsigned char *bytePtr = &cp[index>>3];						\
-	if(val) {													\
-		*bytePtr |= bit;										\
-	}															\
-	else {														\
-		*bytePtr &= ~bit;										\
-	}															\
-}
-#define GET_BIT_ARRAY(cp, index) 								\
-	(cp[index >> 3] & (1 << (index & 7)))
-
-#define getToken(tokenPtr, tokenDex) 				\
-	GET_BIT_ARRAY(tokenPtr, tokenDex)
-
-#define updateToken(tokenPtr, tokenDex, tokenBit) 	\
-	MARK_BIT_ARRAY(tokenPtr, tokenDex, tokenBit)
-
-/*
- * Macros for accessing lookahead array elements
- */
-
-#if		QUEUE_LOOKAHEAD_BIT
-/*
- * This way saves memory
- */
-#define markInQueue(cbuf, codeWord, val) 			\
-	MARK_BIT_ARRAY(cbuf->lookAhead, codeWord, val)
-
-#define inQueue(cbuf, codeWord)						\
-	GET_BIT_ARRAY(cbuf->lookAhead, codeWord)
-
-#else	/* QUEUE_LOOKAHEAD_BIT */
-
-/*
- * This way saves time
- */
-#define markInQueue(cbuf, codeWord, val) {		\
-	cbuf->lookAhead[codeWord] = val;			\
-}
-#define inQueue(cbuf, codeWord)		(cbuf->lookAhead[codeWord])
-
-#endif	/* QUEUE_LOOKAHEAD_BIT */
-
-void *ascMalloc(unsigned size);
-void ascFree(void *data);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif	/*_COMCRYPT_PRIV_H_*/