/* * 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 */ /* Copyright 2013 Doug Whiting. This code is released to the public domain. */ #ifndef _SKEIN_IMPL_H_ #define _SKEIN_IMPL_H_ #include #include #include "skein_impl.h" #include "skein_port.h" /* * "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 */ /* offset 64 because it's the second word */ #define SKEIN_T1_BIT(BIT) ((BIT) - 64) /* bits 112..118: level in hash tree */ #define SKEIN_T1_POS_TREE_LVL SKEIN_T1_BIT(112) /* bit 119: partial final input byte */ #define SKEIN_T1_POS_BIT_PAD SKEIN_T1_BIT(119) /* bits 120..125: type field */ #define SKEIN_T1_POS_BLK_TYPE SKEIN_T1_BIT(120) /* bits 126: first block flag */ #define SKEIN_T1_POS_FIRST SKEIN_T1_BIT(126) /* bit 127: final block flag */ #define SKEIN_T1_POS_FINAL SKEIN_T1_BIT(127) /* tweak word T[1]: flag bit definition(s) */ #define SKEIN_T1_FLAG_FIRST (((uint64_t)1) << SKEIN_T1_POS_FIRST) #define SKEIN_T1_FLAG_FINAL (((uint64_t)1) << SKEIN_T1_POS_FINAL) #define SKEIN_T1_FLAG_BIT_PAD (((uint64_t)1) << SKEIN_T1_POS_BIT_PAD) /* tweak word T[1]: tree level bit field mask */ #define SKEIN_T1_TREE_LVL_MASK (((uint64_t)0x7F) << SKEIN_T1_POS_TREE_LVL) #define SKEIN_T1_TREE_LEVEL(n) (((uint64_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 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) \ (((uint64_t)(SKEIN_BLK_TYPE_##T)) << SKEIN_T1_POS_BLK_TYPE) /* key, for MAC and KDF */ #define SKEIN_T1_BLK_TYPE_KEY SKEIN_T1_BLK_TYPE(KEY) /* configuration block */ #define SKEIN_T1_BLK_TYPE_CFG SKEIN_T1_BLK_TYPE(CFG) /* personalization string */ #define SKEIN_T1_BLK_TYPE_PERS SKEIN_T1_BLK_TYPE(PERS) /* public key (for digital signature hashing) */ #define SKEIN_T1_BLK_TYPE_PK SKEIN_T1_BLK_TYPE(PK) /* key identifier for KDF */ #define SKEIN_T1_BLK_TYPE_KDF SKEIN_T1_BLK_TYPE(KDF) /* nonce for PRNG */ #define SKEIN_T1_BLK_TYPE_NONCE SKEIN_T1_BLK_TYPE(NONCE) /* message processing */ #define SKEIN_T1_BLK_TYPE_MSG SKEIN_T1_BLK_TYPE(MSG) /* output stage */ #define SKEIN_T1_BLK_TYPE_OUT SKEIN_T1_BLK_TYPE(OUT) /* field bit mask */ #define SKEIN_T1_BLK_TYPE_MASK SKEIN_T1_BLK_TYPE(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) + (((uint64_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 \ (((uint64_t)0xFF) << SKEIN_CFG_TREE_LEAF_SIZE_POS) #define SKEIN_CFG_TREE_NODE_SIZE_MSK \ (((uint64_t)0xFF) << SKEIN_CFG_TREE_NODE_SIZE_POS) #define SKEIN_CFG_TREE_MAX_LEVEL_MSK \ (((uint64_t)0xFF) << SKEIN_CFG_TREE_MAX_LEVEL_POS) #define SKEIN_CFG_TREE_INFO(leaf, node, maxLvl) \ ((((uint64_t)(leaf)) << SKEIN_CFG_TREE_LEAF_SIZE_POS) | \ (((uint64_t)(node)) << SKEIN_CFG_TREE_NODE_SIZE_POS) | \ (((uint64_t)(maxLvl)) << SKEIN_CFG_TREE_MAX_LEVEL_POS)) /* use as treeInfo in InitExt() call for sequential processing */ #define SKEIN_CFG_TREE_INFO_SEQUENTIAL SKEIN_CFG_TREE_INFO(0, 0, 0) /* * 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) \ do { \ (ctxPtr)->h.T[TWK_NUM] = (tVal); \ } while (0) #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) \ do { \ Skein_Set_T0(ctxPtr, (T0)); \ Skein_Set_T1(ctxPtr, (T1)); \ } while (0) #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) \ do { \ Skein_Set_T0_T1(ctxPtr, 0, SKEIN_T1_FLAG_FIRST | \ SKEIN_T1_BLK_TYPE_ ## BLK_TYPE); \ (ctxPtr)->h.bCnt = 0; \ } while (0) #define Skein_Clear_First_Flag(hdr) \ do { \ (hdr).T[1] &= ~SKEIN_T1_FLAG_FIRST; \ } while (0) #define Skein_Set_Bit_Pad_Flag(hdr) \ do { \ (hdr).T[1] |= SKEIN_T1_FLAG_BIT_PAD; \ } while (0) #define Skein_Set_Tree_Level(hdr, height) \ do { \ (hdr).T[1] |= SKEIN_T1_TREE_LEVEL(height); \ } while (0) /* * "Internal" Skein definitions for debugging and error checking * Note: in Illumos we always disable debugging features. */ #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) /* run-time checks (e.g., bad params, uninitialized context)? */ #ifndef SKEIN_ERR_CHECK /* default: ignore all Asserts, for performance */ #define Skein_Assert(x, retCode) #define Skein_assert(x) #elif defined(SKEIN_ASSERT) #include #define Skein_Assert(x, retCode) ASSERT(x) #define Skein_assert(x) ASSERT(x) #else #include /* caller error */ #define Skein_Assert(x, retCode) \ do { \ if (!(x)) \ return (retCode); \ } while (0) /* internal error */ #define Skein_assert(x) ASSERT(x) #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 }; /* number of rounds for the different block sizes */ #define SKEIN_256_ROUNDS_TOTAL (72) #define SKEIN_512_ROUNDS_TOTAL (72) #define SKEIN1024_ROUNDS_TOTAL (80) extern const uint64_t SKEIN_256_IV_128[]; extern const uint64_t SKEIN_256_IV_160[]; extern const uint64_t SKEIN_256_IV_224[]; extern const uint64_t SKEIN_256_IV_256[]; extern const uint64_t SKEIN_512_IV_128[]; extern const uint64_t SKEIN_512_IV_160[]; extern const uint64_t SKEIN_512_IV_224[]; extern const uint64_t SKEIN_512_IV_256[]; extern const uint64_t SKEIN_512_IV_384[]; extern const uint64_t SKEIN_512_IV_512[]; extern const uint64_t SKEIN1024_IV_384[]; extern const uint64_t SKEIN1024_IV_512[]; extern const uint64_t SKEIN1024_IV_1024[]; /* Functions to process blkCnt (nonzero) full block(s) of data. */ void Skein_256_Process_Block(Skein_256_Ctxt_t *ctx, const uint8_t *blkPtr, size_t blkCnt, size_t byteCntAdd); void Skein_512_Process_Block(Skein_512_Ctxt_t *ctx, const uint8_t *blkPtr, size_t blkCnt, size_t byteCntAdd); void Skein1024_Process_Block(Skein1024_Ctxt_t *ctx, const uint8_t *blkPtr, size_t blkCnt, size_t byteCntAdd); #endif /* _SKEIN_IMPL_H_ */