#define Skein_Swap64(w64) (w64)
enum
- {
- SKEIN_SUCCESS = 0, /* return codes from Skein calls */
- SKEIN_FAIL = 1,
- SKEIN_BAD_HASHLEN = 2
- };
+ {
+ 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 SKEIN1024_BLOCK_BYTES (8*SKEIN1024_STATE_WORDS)
struct skein_ctx_hdr
- {
- size_t hashBitLen; /* size of hash result, in bits */
- size_t bCnt; /* current byte count in buffer b[] */
- u64 T[SKEIN_MODIFIER_WORDS]; /* tweak words: T[0]=byte cnt, T[1]=flags */
- };
+ {
+ size_t hashBitLen; /* size of hash result, in bits */
+ size_t bCnt; /* current byte count in buffer b[] */
+ u64 T[SKEIN_MODIFIER_WORDS]; /* tweak words: T[0]=byte cnt, T[1]=flags */
+ };
struct skein_256_ctx /* 256-bit Skein hash context structure */
- {
- struct skein_ctx_hdr h; /* common header context variables */
- u64 X[SKEIN_256_STATE_WORDS]; /* chaining variables */
- u8 b[SKEIN_256_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
- };
+ {
+ struct skein_ctx_hdr h; /* common header context variables */
+ u64 X[SKEIN_256_STATE_WORDS]; /* chaining variables */
+ u8 b[SKEIN_256_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
+ };
struct skein_512_ctx /* 512-bit Skein hash context structure */
- {
- struct skein_ctx_hdr h; /* common header context variables */
- u64 X[SKEIN_512_STATE_WORDS]; /* chaining variables */
- u8 b[SKEIN_512_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
- };
+ {
+ struct skein_ctx_hdr h; /* common header context variables */
+ u64 X[SKEIN_512_STATE_WORDS]; /* chaining variables */
+ u8 b[SKEIN_512_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
+ };
struct skein1024_ctx /* 1024-bit Skein hash context structure */
- {
- struct skein_ctx_hdr h; /* common header context variables */
- u64 X[SKEIN1024_STATE_WORDS]; /* chaining variables */
- u8 b[SKEIN1024_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
- };
+ {
+ struct skein_ctx_hdr h; /* common header context variables */
+ u64 X[SKEIN1024_STATE_WORDS]; /* chaining variables */
+ u8 b[SKEIN1024_BLOCK_BYTES]; /* partial block buffer (8-byte aligned) */
+ };
/* Skein APIs for (incremental) "straight hashing" */
int Skein_256_Init(struct skein_256_ctx *ctx, size_t hashBitLen);
/* 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 (((u64) 1) << SKEIN_T1_POS_FIRST)
#define SKEIN_T1_FLAG_FINAL (((u64) 1) << SKEIN_T1_POS_FINAL)
#define SKEIN_T1_FLAG_BIT_PAD (((u64) 1) << SKEIN_T1_POS_BIT_PAD)
-
+
/* tweak word T[1]: tree level bit field mask */
#define SKEIN_T1_TREE_LVL_MASK (((u64)0x7F) << SKEIN_T1_POS_TREE_LVL)
#define SKEIN_T1_TREE_LEVEL(n) (((u64) (n)) << SKEIN_T1_POS_TREE_LVL)
#define SKEIN_CFG_TREE_MAX_LEVEL_MSK (((u64) 0xFF) << SKEIN_CFG_TREE_MAX_LEVEL_POS)
#define SKEIN_CFG_TREE_INFO(leaf, node, maxLvl) \
- ((((u64)(leaf)) << SKEIN_CFG_TREE_LEAF_SIZE_POS) | \
- (((u64)(node)) << SKEIN_CFG_TREE_NODE_SIZE_POS) | \
- (((u64)(maxLvl)) << SKEIN_CFG_TREE_MAX_LEVEL_POS))
+ ((((u64)(leaf)) << SKEIN_CFG_TREE_LEAF_SIZE_POS) | \
+ (((u64)(node)) << SKEIN_CFG_TREE_NODE_SIZE_POS) | \
+ (((u64)(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 */
/* set both tweak words at once */
#define Skein_Set_T0_T1(ctxPtr, T0, T1) \
- { \
- Skein_Set_T0(ctxPtr, (T0)); \
- Skein_Set_T1(ctxPtr, (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)
+ 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; }
+ { 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; }
** 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
- };
+ {
+ /* 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 */
#include <linux/types.h>
#include <skein.h>
- /**
- * Which Skein size to use
- */
- enum skein_size {
- Skein256 = 256, /*!< Skein with 256 bit state */
- Skein512 = 512, /*!< Skein with 512 bit state */
- Skein1024 = 1024 /*!< Skein with 1024 bit state */
- };
-
- /**
- * Context for Skein.
- *
- * This structure was setup with some know-how of the internal
- * Skein structures, in particular ordering of header and size dependent
- * variables. If Skein implementation changes this, then adapt these
- * structures as well.
- */
- struct skein_ctx {
- u64 skeinSize;
- u64 XSave[SKEIN_MAX_STATE_WORDS]; /* save area for state variables */
- union {
- struct skein_ctx_hdr h;
- struct skein_256_ctx s256;
- struct skein_512_ctx s512;
- struct skein1024_ctx s1024;
- } m;
- };
-
- /**
- * Prepare a Skein context.
- *
- * An application must call this function before it can use the Skein
- * context. The functions clears memory and initializes size dependent
- * variables.
- *
- * @param ctx
- * Pointer to a Skein context.
- * @param size
- * Which Skein size to use.
- * @return
- * SKEIN_SUCESS of SKEIN_FAIL
- */
- int skeinCtxPrepare(struct skein_ctx *ctx, enum skein_size size);
-
- /**
- * Initialize a Skein context.
- *
- * Initializes the context with this data and saves the resulting Skein
- * state variables for further use.
- *
- * @param ctx
- * Pointer to a Skein context.
- * @param hashBitLen
- * Number of MAC hash bits to compute
- * @return
- * SKEIN_SUCESS of SKEIN_FAIL
- * @see skeinReset
- */
- int skeinInit(struct skein_ctx *ctx, size_t hashBitLen);
-
- /**
- * Resets a Skein context for further use.
- *
- * Restores the saved chaining variables to reset the Skein context.
- * Thus applications can reuse the same setup to process several
- * messages. This saves a complete Skein initialization cycle.
- *
- * @param ctx
- * Pointer to a pre-initialized Skein MAC context
- */
- void skeinReset(struct skein_ctx *ctx);
-
- /**
- * Initializes a Skein context for MAC usage.
- *
- * Initializes the context with this data and saves the resulting Skein
- * state variables for further use.
- *
- * Applications call the normal Skein functions to update the MAC and
- * get the final result.
- *
- * @param ctx
- * Pointer to an empty or preinitialized Skein MAC context
- * @param key
- * Pointer to key bytes or NULL
- * @param keyLen
- * Length of the key in bytes or zero
- * @param hashBitLen
- * Number of MAC hash bits to compute
- * @return
- * SKEIN_SUCESS of SKEIN_FAIL
- */
- int skeinMacInit(struct skein_ctx *ctx, const u8 *key, size_t keyLen,
- size_t hashBitLen);
-
- /**
- * Update Skein with the next part of the message.
- *
- * @param ctx
- * Pointer to initialized Skein context
- * @param msg
- * Pointer to the message.
- * @param msgByteCnt
- * Length of the message in @b bytes
- * @return
- * Success or error code.
- */
- int skeinUpdate(struct skein_ctx *ctx, const u8 *msg,
- size_t msgByteCnt);
-
- /**
- * Update the hash with a message bit string.
- *
- * Skein can handle data not only as bytes but also as bit strings of
- * arbitrary length (up to its maximum design size).
- *
- * @param ctx
- * Pointer to initialized Skein context
- * @param msg
- * Pointer to the message.
- * @param msgBitCnt
- * Length of the message in @b bits.
- */
- int skeinUpdateBits(struct skein_ctx *ctx, const u8 *msg,
- size_t msgBitCnt);
-
- /**
- * Finalize Skein and return the hash.
- *
- * Before an application can reuse a Skein setup the application must
- * reset the Skein context.
- *
- * @param ctx
- * Pointer to initialized Skein context
- * @param hash
- * Pointer to buffer that receives the hash. The buffer must be large
- * enough to store @c hashBitLen bits.
- * @return
- * Success or error code.
- * @see skeinReset
- */
- int skeinFinal(struct skein_ctx *ctx, u8 *hash);
+/**
+ * Which Skein size to use
+ */
+enum skein_size {
+ Skein256 = 256, /*!< Skein with 256 bit state */
+ Skein512 = 512, /*!< Skein with 512 bit state */
+ Skein1024 = 1024 /*!< Skein with 1024 bit state */
+};
+
+/**
+ * Context for Skein.
+ *
+ * This structure was setup with some know-how of the internal
+ * Skein structures, in particular ordering of header and size dependent
+ * variables. If Skein implementation changes this, then adapt these
+ * structures as well.
+ */
+struct skein_ctx {
+ u64 skeinSize;
+ u64 XSave[SKEIN_MAX_STATE_WORDS]; /* save area for state variables */
+ union {
+ struct skein_ctx_hdr h;
+ struct skein_256_ctx s256;
+ struct skein_512_ctx s512;
+ struct skein1024_ctx s1024;
+ } m;
+};
+
+/**
+ * Prepare a Skein context.
+ *
+ * An application must call this function before it can use the Skein
+ * context. The functions clears memory and initializes size dependent
+ * variables.
+ *
+ * @param ctx
+ * Pointer to a Skein context.
+ * @param size
+ * Which Skein size to use.
+ * @return
+ * SKEIN_SUCESS of SKEIN_FAIL
+ */
+int skeinCtxPrepare(struct skein_ctx *ctx, enum skein_size size);
+
+/**
+ * Initialize a Skein context.
+ *
+ * Initializes the context with this data and saves the resulting Skein
+ * state variables for further use.
+ *
+ * @param ctx
+ * Pointer to a Skein context.
+ * @param hashBitLen
+ * Number of MAC hash bits to compute
+ * @return
+ * SKEIN_SUCESS of SKEIN_FAIL
+ * @see skeinReset
+ */
+int skeinInit(struct skein_ctx *ctx, size_t hashBitLen);
+
+/**
+ * Resets a Skein context for further use.
+ *
+ * Restores the saved chaining variables to reset the Skein context.
+ * Thus applications can reuse the same setup to process several
+ * messages. This saves a complete Skein initialization cycle.
+ *
+ * @param ctx
+ * Pointer to a pre-initialized Skein MAC context
+ */
+void skeinReset(struct skein_ctx *ctx);
+
+/**
+ * Initializes a Skein context for MAC usage.
+ *
+ * Initializes the context with this data and saves the resulting Skein
+ * state variables for further use.
+ *
+ * Applications call the normal Skein functions to update the MAC and
+ * get the final result.
+ *
+ * @param ctx
+ * Pointer to an empty or preinitialized Skein MAC context
+ * @param key
+ * Pointer to key bytes or NULL
+ * @param keyLen
+ * Length of the key in bytes or zero
+ * @param hashBitLen
+ * Number of MAC hash bits to compute
+ * @return
+ * SKEIN_SUCESS of SKEIN_FAIL
+ */
+int skeinMacInit(struct skein_ctx *ctx, const u8 *key, size_t keyLen,
+ size_t hashBitLen);
+
+/**
+ * Update Skein with the next part of the message.
+ *
+ * @param ctx
+ * Pointer to initialized Skein context
+ * @param msg
+ * Pointer to the message.
+ * @param msgByteCnt
+ * Length of the message in @b bytes
+ * @return
+ * Success or error code.
+ */
+int skeinUpdate(struct skein_ctx *ctx, const u8 *msg,
+ size_t msgByteCnt);
+
+/**
+ * Update the hash with a message bit string.
+ *
+ * Skein can handle data not only as bytes but also as bit strings of
+ * arbitrary length (up to its maximum design size).
+ *
+ * @param ctx
+ * Pointer to initialized Skein context
+ * @param msg
+ * Pointer to the message.
+ * @param msgBitCnt
+ * Length of the message in @b bits.
+ */
+int skeinUpdateBits(struct skein_ctx *ctx, const u8 *msg,
+ size_t msgBitCnt);
+
+/**
+ * Finalize Skein and return the hash.
+ *
+ * Before an application can reuse a Skein setup the application must
+ * reset the Skein context.
+ *
+ * @param ctx
+ * Pointer to initialized Skein context
+ * @param hash
+ * Pointer to buffer that receives the hash. The buffer must be large
+ * enough to store @c hashBitLen bits.
+ * @return
+ * Success or error code.
+ * @see skeinReset
+ */
+int skeinFinal(struct skein_ctx *ctx, u8 *hash);
/**
* @}
git.openpandora.org / pandora-kernel.git / commitdiff