Differential D6166 Diff 17051 head/sys/crypto/skein/skein.h

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head/sys/crypto/skein/skein.h

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				/* $FreeBSD$ */
				#ifndef _SKEIN_H_
				#define _SKEIN_H_ 1
				/**************************************************************************
				**
				** Interface declarations and internal definitions for Skein hashing.
				**
				** Source code author: Doug Whiting, 2008.
				**
				** This algorithm and source code is released to the public domain.
				**
				***************************************************************************
				**
				** The following compile-time switches may be defined to control some
				** tradeoffs between speed, code size, error checking, and security.
				**
				** The "default" note explains what happens when the switch is not defined.
				**
				** SKEIN_DEBUG -- make callouts from inside Skein code
				** to examine/display intermediate values.
				** [default: no callouts (no overhead)]
				**
				** SKEIN_ERR_CHECK -- how error checking is handled inside Skein
				** code. If not defined, most error checking
				** is disabled (for performance). Otherwise,
				** the switch value is interpreted as:
				** 0: use assert() to flag errors
				** 1: return SKEIN_FAIL to flag errors
				**
				***************************************************************************/
				#ifdef __cplusplus
				extern "C"
				{
				#endif

				#ifndef _KERNEL
				#include <stddef.h> /* get size_t definition */
				#endif
				#include "skein_port.h" /* get platform-specific definitions */

				enum
				{
				SKEIN_SUCCESS = 0, /* return codes from Skein calls */
				SKEIN_FAIL = 1,
				SKEIN_BAD_HASHLEN = 2
				};

				#define SKEIN_MODIFIER_WORDS ( 2) /* number of modifier (tweak) words */

				#define SKEIN_256_STATE_WORDS ( 4)
				#define SKEIN_512_STATE_WORDS ( 8)
				#define SKEIN1024_STATE_WORDS (16)
				#define SKEIN_MAX_STATE_WORDS (16)

				#define SKEIN_256_STATE_BYTES ( 8*SKEIN_256_STATE_WORDS)
				#define SKEIN_512_STATE_BYTES ( 8*SKEIN_512_STATE_WORDS)
				#define SKEIN1024_STATE_BYTES ( 8*SKEIN1024_STATE_WORDS)

				#define SKEIN_256_STATE_BITS (64*SKEIN_256_STATE_WORDS)
				#define SKEIN_512_STATE_BITS (64*SKEIN_512_STATE_WORDS)
				#define SKEIN1024_STATE_BITS (64*SKEIN1024_STATE_WORDS)

				#define SKEIN_256_BLOCK_BYTES ( 8*SKEIN_256_STATE_WORDS)
				#define SKEIN_512_BLOCK_BYTES ( 8*SKEIN_512_STATE_WORDS)
				#define SKEIN1024_BLOCK_BYTES ( 8*SKEIN1024_STATE_WORDS)

				typedef struct
				{
				size_t hashBitLen; /* size of hash result, in bits */
				size_t bCnt; /* current byte count in buffer b[] */
				u64b_t T[SKEIN_MODIFIER_WORDS]; /* tweak words: T[0]=byte cnt, T[1]=flags */
				} Skein_Ctxt_Hdr_t;

				typedef struct /* 256-bit Skein hash context structure */
				{
				Skein_Ctxt_Hdr_t h; /* common header context variables */
				u64b_t X[SKEIN_256_STATE_WORDS]; /* chaining variables */
				u08b_t b[SKEIN_256_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
				} Skein_256_Ctxt_t;

				typedef struct /* 512-bit Skein hash context structure */
				{
				Skein_Ctxt_Hdr_t h; /* common header context variables */
				u64b_t X[SKEIN_512_STATE_WORDS]; /* chaining variables */
				u08b_t b[SKEIN_512_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
				} Skein_512_Ctxt_t;

				typedef struct /* 1024-bit Skein hash context structure */
				{
				Skein_Ctxt_Hdr_t h; /* common header context variables */
				u64b_t X[SKEIN1024_STATE_WORDS]; /* chaining variables */
				u08b_t b[SKEIN1024_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
				} Skein1024_Ctxt_t;

				/* Skein APIs for (incremental) "straight hashing" */
				int Skein_256_Init (Skein_256_Ctxt_t *ctx, size_t hashBitLen);
				int Skein_512_Init (Skein_512_Ctxt_t *ctx, size_t hashBitLen);
				int Skein1024_Init (Skein1024_Ctxt_t *ctx, size_t hashBitLen);

				int Skein_256_Update(Skein_256_Ctxt_t ctx, const u08b_t msg, size_t msgByteCnt);
				int Skein_512_Update(Skein_512_Ctxt_t ctx, const u08b_t msg, size_t msgByteCnt);
				int Skein1024_Update(Skein1024_Ctxt_t ctx, const u08b_t msg, size_t msgByteCnt);

				int Skein_256_Final (Skein_256_Ctxt_t ctx, u08b_t hashVal);
				int Skein_512_Final (Skein_512_Ctxt_t ctx, u08b_t hashVal);
				int Skein1024_Final (Skein1024_Ctxt_t ctx, u08b_t hashVal);

				/*
				** Skein APIs for "extended" initialization: MAC keys, tree hashing.
				** After an InitExt() call, just use Update/Final calls as with Init().
				**
				** Notes: Same parameters as _Init() calls, plus treeInfo/key/keyBytes.
				** When keyBytes == 0 and treeInfo == SKEIN_SEQUENTIAL,
				** the results of InitExt() are identical to calling Init().
				** The function Init() may be called once to "precompute" the IV for
				** a given hashBitLen value, then by saving a copy of the context
				** the IV computation may be avoided in later calls.
				** Similarly, the function InitExt() may be called once per MAC key
				** to precompute the MAC IV, then a copy of the context saved and
				** reused for each new MAC computation.
				**/
				int Skein_256_InitExt(Skein_256_Ctxt_t ctx, size_t hashBitLen, u64b_t treeInfo, const u08b_t key, size_t keyBytes);
				int Skein_512_InitExt(Skein_512_Ctxt_t ctx, size_t hashBitLen, u64b_t treeInfo, const u08b_t key, size_t keyBytes);
				int Skein1024_InitExt(Skein1024_Ctxt_t ctx, size_t hashBitLen, u64b_t treeInfo, const u08b_t key, size_t keyBytes);

				/*
				** Skein APIs for MAC and tree hash:
				** Final_Pad: pad, do final block, but no OUTPUT type
				** Output: do just the output stage
				*/
				int Skein_256_Final_Pad(Skein_256_Ctxt_t ctx, u08b_t hashVal);
				int Skein_512_Final_Pad(Skein_512_Ctxt_t ctx, u08b_t hashVal);
				int Skein1024_Final_Pad(Skein1024_Ctxt_t ctx, u08b_t hashVal);

				#ifndef SKEIN_TREE_HASH
				#define SKEIN_TREE_HASH (1)
				#endif
				#if SKEIN_TREE_HASH
				int Skein_256_Output (Skein_256_Ctxt_t ctx, u08b_t hashVal);
				int Skein_512_Output (Skein_512_Ctxt_t ctx, u08b_t hashVal);
				int Skein1024_Output (Skein1024_Ctxt_t ctx, u08b_t hashVal);
				#endif

				/*****************************************************************
				** "Internal" Skein definitions
				** -- not needed for sequential hashing API, but will be
				** helpful for other uses of Skein (e.g., tree hash mode).
				** -- included here so that they can be shared between
				** reference and optimized code.
				******************************************************************/

				/* tweak word T[1]: bit field starting positions */
				#define SKEIN_T1_BIT(BIT) ((BIT) - 64) /* offset 64 because it's the second word */

				#define SKEIN_T1_POS_TREE_LVL SKEIN_T1_BIT(112) /* bits 112..118: level in hash tree */
				#define SKEIN_T1_POS_BIT_PAD SKEIN_T1_BIT(119) /* bit 119 : partial final input byte */
				#define SKEIN_T1_POS_BLK_TYPE SKEIN_T1_BIT(120) /* bits 120..125: type field */
				#define SKEIN_T1_POS_FIRST SKEIN_T1_BIT(126) /* bits 126 : first block flag */
				#define SKEIN_T1_POS_FINAL SKEIN_T1_BIT(127) /* bit 127 : final block flag */

				/* tweak word T[1]: flag bit definition(s) */
				#define SKEIN_T1_FLAG_FIRST (((u64b_t) 1 ) << SKEIN_T1_POS_FIRST)
				#define SKEIN_T1_FLAG_FINAL (((u64b_t) 1 ) << SKEIN_T1_POS_FINAL)
				#define SKEIN_T1_FLAG_BIT_PAD (((u64b_t) 1 ) << SKEIN_T1_POS_BIT_PAD)

				/* tweak word T[1]: tree level bit field mask */
				#define SKEIN_T1_TREE_LVL_MASK (((u64b_t)0x7F) << SKEIN_T1_POS_TREE_LVL)
				#define SKEIN_T1_TREE_LEVEL(n) (((u64b_t) (n)) << SKEIN_T1_POS_TREE_LVL)

				/* tweak word T[1]: block type field */
				#define SKEIN_BLK_TYPE_KEY ( 0) /* key, for MAC and KDF */
				#define SKEIN_BLK_TYPE_CFG ( 4) /* configuration block */
				#define SKEIN_BLK_TYPE_PERS ( 8) /* personalization string */
				#define SKEIN_BLK_TYPE_PK (12) /* public key (for digital signature hashing) */
				#define SKEIN_BLK_TYPE_KDF (16) /* key identifier for KDF */
				#define SKEIN_BLK_TYPE_NONCE (20) /* nonce for PRNG */
				#define SKEIN_BLK_TYPE_MSG (48) /* message processing */
				#define SKEIN_BLK_TYPE_OUT (63) /* output stage */
				#define SKEIN_BLK_TYPE_MASK (63) /* bit field mask */

				#define SKEIN_T1_BLK_TYPE(T) (((u64b_t) (SKEIN_BLK_TYPE_##T)) << SKEIN_T1_POS_BLK_TYPE)
				#define SKEIN_T1_BLK_TYPE_KEY SKEIN_T1_BLK_TYPE(KEY) /* key, for MAC and KDF */
				#define SKEIN_T1_BLK_TYPE_CFG SKEIN_T1_BLK_TYPE(CFG) /* configuration block */
				#define SKEIN_T1_BLK_TYPE_PERS SKEIN_T1_BLK_TYPE(PERS) /* personalization string */
				#define SKEIN_T1_BLK_TYPE_PK SKEIN_T1_BLK_TYPE(PK) /* public key (for digital signature hashing) */
				#define SKEIN_T1_BLK_TYPE_KDF SKEIN_T1_BLK_TYPE(KDF) /* key identifier for KDF */
				#define SKEIN_T1_BLK_TYPE_NONCE SKEIN_T1_BLK_TYPE(NONCE)/* nonce for PRNG */
				#define SKEIN_T1_BLK_TYPE_MSG SKEIN_T1_BLK_TYPE(MSG) /* message processing */
				#define SKEIN_T1_BLK_TYPE_OUT SKEIN_T1_BLK_TYPE(OUT) /* output stage */
				#define SKEIN_T1_BLK_TYPE_MASK SKEIN_T1_BLK_TYPE(MASK) /* field bit mask */

				#define SKEIN_T1_BLK_TYPE_CFG_FINAL (SKEIN_T1_BLK_TYPE_CFG \| SKEIN_T1_FLAG_FINAL)
				#define SKEIN_T1_BLK_TYPE_OUT_FINAL (SKEIN_T1_BLK_TYPE_OUT \| SKEIN_T1_FLAG_FINAL)

				#define SKEIN_VERSION (1)

				#ifndef SKEIN_ID_STRING_LE /* allow compile-time personalization */
				#define SKEIN_ID_STRING_LE (0x33414853) /* "SHA3" (little-endian)*/
				#endif

				#define SKEIN_MK_64(hi32,lo32) ((lo32) + (((u64b_t) (hi32)) << 32))
				#define SKEIN_SCHEMA_VER SKEIN_MK_64(SKEIN_VERSION,SKEIN_ID_STRING_LE)
				#define SKEIN_KS_PARITY SKEIN_MK_64(0x1BD11BDA,0xA9FC1A22)

				#define SKEIN_CFG_STR_LEN (4*8)

				/* bit field definitions in config block treeInfo word */
				#define SKEIN_CFG_TREE_LEAF_SIZE_POS ( 0)
				#define SKEIN_CFG_TREE_NODE_SIZE_POS ( 8)
				#define SKEIN_CFG_TREE_MAX_LEVEL_POS (16)

				#define SKEIN_CFG_TREE_LEAF_SIZE_MSK (((u64b_t) 0xFF) << SKEIN_CFG_TREE_LEAF_SIZE_POS)
				#define SKEIN_CFG_TREE_NODE_SIZE_MSK (((u64b_t) 0xFF) << SKEIN_CFG_TREE_NODE_SIZE_POS)
				#define SKEIN_CFG_TREE_MAX_LEVEL_MSK (((u64b_t) 0xFF) << SKEIN_CFG_TREE_MAX_LEVEL_POS)

				#define SKEIN_CFG_TREE_INFO(leaf,node,maxLvl) \
				( (((u64b_t)(leaf )) << SKEIN_CFG_TREE_LEAF_SIZE_POS) \| \
				(((u64b_t)(node )) << SKEIN_CFG_TREE_NODE_SIZE_POS) \| \
				(((u64b_t)(maxLvl)) << SKEIN_CFG_TREE_MAX_LEVEL_POS) )

				#define SKEIN_CFG_TREE_INFO_SEQUENTIAL SKEIN_CFG_TREE_INFO(0,0,0) /* use as treeInfo in InitExt() call for sequential processing */

				/*
				** Skein macros for getting/setting tweak words, etc.
				** These are useful for partial input bytes, hash tree init/update, etc.
				**/
				#define Skein_Get_Tweak(ctxPtr,TWK_NUM) ((ctxPtr)->h.T[TWK_NUM])
				#define Skein_Set_Tweak(ctxPtr,TWK_NUM,tVal) {(ctxPtr)->h.T[TWK_NUM] = (tVal);}

				#define Skein_Get_T0(ctxPtr) Skein_Get_Tweak(ctxPtr,0)
				#define Skein_Get_T1(ctxPtr) Skein_Get_Tweak(ctxPtr,1)
				#define Skein_Set_T0(ctxPtr,T0) Skein_Set_Tweak(ctxPtr,0,T0)
				#define Skein_Set_T1(ctxPtr,T1) Skein_Set_Tweak(ctxPtr,1,T1)

				/* set both tweak words at once */
				#define Skein_Set_T0_T1(ctxPtr,T0,T1) \
				{ \
				Skein_Set_T0(ctxPtr,(T0)); \
				Skein_Set_T1(ctxPtr,(T1)); \
				}

				#define Skein_Set_Type(ctxPtr,BLK_TYPE) \
				Skein_Set_T1(ctxPtr,SKEIN_T1_BLK_TYPE_##BLK_TYPE)

				/* set up for starting with a new type: h.T[0]=0; h.T[1] = NEW_TYPE; h.bCnt=0; */
				#define Skein_Start_New_Type(ctxPtr,BLK_TYPE) \
				{ Skein_Set_T0_T1(ctxPtr,0,SKEIN_T1_FLAG_FIRST \| SKEIN_T1_BLK_TYPE_##BLK_TYPE); (ctxPtr)->h.bCnt=0; }

				#define Skein_Clear_First_Flag(hdr) { (hdr).T[1] &= ~SKEIN_T1_FLAG_FIRST; }
				#define Skein_Set_Bit_Pad_Flag(hdr) { (hdr).T[1] \|= SKEIN_T1_FLAG_BIT_PAD; }

				#define Skein_Set_Tree_Level(hdr,height) { (hdr).T[1] \|= SKEIN_T1_TREE_LEVEL(height);}

				/*****************************************************************
				** "Internal" Skein definitions for debugging and error checking
				******************************************************************/
				#ifdef SKEIN_DEBUG /* examine/display intermediate values? */
				#include "skein_debug.h"
				#else /* default is no callouts */
				#define Skein_Show_Block(bits,ctx,X,blkPtr,wPtr,ksEvenPtr,ksOddPtr)
				#define Skein_Show_Round(bits,ctx,r,X)
				#define Skein_Show_R_Ptr(bits,ctx,r,X_ptr)
				#define Skein_Show_Final(bits,ctx,cnt,outPtr)
				#define Skein_Show_Key(bits,ctx,key,keyBytes)
				#endif

				#ifndef SKEIN_ERR_CHECK /* run-time checks (e.g., bad params, uninitialized context)? */
				#define Skein_Assert(x,retCode)/* default: ignore all Asserts, for performance */
				#define Skein_assert(x)
				#elif defined(SKEIN_ASSERT)
				#include <assert.h>
				#define Skein_Assert(x,retCode) assert(x)
				#define Skein_assert(x) assert(x)
				#else
				#include <assert.h>
				#define Skein_Assert(x,retCode) { if (!(x)) return retCode; } /* caller error */
				#define Skein_assert(x) assert(x) /* internal error */
				#endif

				/*****************************************************************
				** Skein block function constants (shared across Ref and Opt code)
				******************************************************************/
				enum
				{
				/* Skein_256 round rotation constants */
				R_256_0_0=14, R_256_0_1=16,
				R_256_1_0=52, R_256_1_1=57,
				R_256_2_0=23, R_256_2_1=40,
				R_256_3_0= 5, R_256_3_1=37,
				R_256_4_0=25, R_256_4_1=33,
				R_256_5_0=46, R_256_5_1=12,
				R_256_6_0=58, R_256_6_1=22,
				R_256_7_0=32, R_256_7_1=32,

				/* Skein_512 round rotation constants */
				R_512_0_0=46, R_512_0_1=36, R_512_0_2=19, R_512_0_3=37,
				R_512_1_0=33, R_512_1_1=27, R_512_1_2=14, R_512_1_3=42,
				R_512_2_0=17, R_512_2_1=49, R_512_2_2=36, R_512_2_3=39,
				R_512_3_0=44, R_512_3_1= 9, R_512_3_2=54, R_512_3_3=56,
				R_512_4_0=39, R_512_4_1=30, R_512_4_2=34, R_512_4_3=24,
				R_512_5_0=13, R_512_5_1=50, R_512_5_2=10, R_512_5_3=17,
				R_512_6_0=25, R_512_6_1=29, R_512_6_2=39, R_512_6_3=43,
				R_512_7_0= 8, R_512_7_1=35, R_512_7_2=56, R_512_7_3=22,

				/* Skein1024 round rotation constants */
				R1024_0_0=24, R1024_0_1=13, R1024_0_2= 8, R1024_0_3=47, R1024_0_4= 8, R1024_0_5=17, R1024_0_6=22, R1024_0_7=37,
				R1024_1_0=38, R1024_1_1=19, R1024_1_2=10, R1024_1_3=55, R1024_1_4=49, R1024_1_5=18, R1024_1_6=23, R1024_1_7=52,
				R1024_2_0=33, R1024_2_1= 4, R1024_2_2=51, R1024_2_3=13, R1024_2_4=34, R1024_2_5=41, R1024_2_6=59, R1024_2_7=17,
				R1024_3_0= 5, R1024_3_1=20, R1024_3_2=48, R1024_3_3=41, R1024_3_4=47, R1024_3_5=28, R1024_3_6=16, R1024_3_7=25,
				R1024_4_0=41, R1024_4_1= 9, R1024_4_2=37, R1024_4_3=31, R1024_4_4=12, R1024_4_5=47, R1024_4_6=44, R1024_4_7=30,
				R1024_5_0=16, R1024_5_1=34, R1024_5_2=56, R1024_5_3=51, R1024_5_4= 4, R1024_5_5=53, R1024_5_6=42, R1024_5_7=41,
				R1024_6_0=31, R1024_6_1=44, R1024_6_2=47, R1024_6_3=46, R1024_6_4=19, R1024_6_5=42, R1024_6_6=44, R1024_6_7=25,
				R1024_7_0= 9, R1024_7_1=48, R1024_7_2=35, R1024_7_3=52, R1024_7_4=23, R1024_7_5=31, R1024_7_6=37, R1024_7_7=20
				};

				#ifndef SKEIN_ROUNDS
				#define SKEIN_256_ROUNDS_TOTAL (72) /* number of rounds for the different block sizes */
				#define SKEIN_512_ROUNDS_TOTAL (72)
				#define SKEIN1024_ROUNDS_TOTAL (80)
				#else /* allow command-line define in range 8(5..14) /
				#define SKEIN_256_ROUNDS_TOTAL (8*((((SKEIN_ROUNDS/100) + 5) % 10) + 5))
				#define SKEIN_512_ROUNDS_TOTAL (8*((((SKEIN_ROUNDS/ 10) + 5) % 10) + 5))
				#define SKEIN1024_ROUNDS_TOTAL (8*((((SKEIN_ROUNDS ) + 5) % 10) + 5))
				#endif

				#ifdef __cplusplus
				}
				#endif

				/* Pull in FreeBSD specific shims */
				#include "skein_freebsd.h"

				#endif /* ifndef _SKEIN_H_ */