+++ /dev/null
-/*
- * Interface declarations 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 _SYS_SKEIN_H_
-#define _SYS_SKEIN_H_
-
-#ifdef _KERNEL
-#include <sys/types.h> /* get size_t definition */
-#else
-#include <stdint.h>
-#include <stdlib.h>
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-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[] */
- /* tweak words: T[0]=byte cnt, T[1]=flags */
- uint64_t T[SKEIN_MODIFIER_WORDS];
-} Skein_Ctxt_Hdr_t;
-
-typedef struct { /* 256-bit Skein hash context structure */
- Skein_Ctxt_Hdr_t h; /* common header context variables */
- uint64_t X[SKEIN_256_STATE_WORDS]; /* chaining variables */
- /* partial block buffer (8-byte aligned) */
- uint8_t b[SKEIN_256_BLOCK_BYTES];
-} Skein_256_Ctxt_t;
-
-typedef struct { /* 512-bit Skein hash context structure */
- Skein_Ctxt_Hdr_t h; /* common header context variables */
- uint64_t X[SKEIN_512_STATE_WORDS]; /* chaining variables */
- /* partial block buffer (8-byte aligned) */
- uint8_t b[SKEIN_512_BLOCK_BYTES];
-} Skein_512_Ctxt_t;
-
-typedef struct { /* 1024-bit Skein hash context structure */
- Skein_Ctxt_Hdr_t h; /* common header context variables */
- uint64_t X[SKEIN1024_STATE_WORDS]; /* chaining variables */
- /* partial block buffer (8-byte aligned) */
- uint8_t b[SKEIN1024_BLOCK_BYTES];
-} 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 uint8_t *msg,
- size_t msgByteCnt);
-int Skein_512_Update(Skein_512_Ctxt_t *ctx, const uint8_t *msg,
- size_t msgByteCnt);
-int Skein1024_Update(Skein1024_Ctxt_t *ctx, const uint8_t *msg,
- size_t msgByteCnt);
-
-int Skein_256_Final(Skein_256_Ctxt_t *ctx, uint8_t *hashVal);
-int Skein_512_Final(Skein_512_Ctxt_t *ctx, uint8_t *hashVal);
-int Skein1024_Final(Skein1024_Ctxt_t *ctx, uint8_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,
- uint64_t treeInfo, const uint8_t *key, size_t keyBytes);
-int Skein_512_InitExt(Skein_512_Ctxt_t *ctx, size_t hashBitLen,
- uint64_t treeInfo, const uint8_t *key, size_t keyBytes);
-int Skein1024_InitExt(Skein1024_Ctxt_t *ctx, size_t hashBitLen,
- uint64_t treeInfo, const uint8_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, uint8_t *hashVal);
-int Skein_512_Final_Pad(Skein_512_Ctxt_t *ctx, uint8_t *hashVal);
-int Skein1024_Final_Pad(Skein1024_Ctxt_t *ctx, uint8_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, uint8_t *hashVal);
-int Skein_512_Output(Skein_512_Ctxt_t *ctx, uint8_t *hashVal);
-int Skein1024_Output(Skein1024_Ctxt_t *ctx, uint8_t *hashVal);
-#endif
-
-/*
- * When you initialize a Skein KCF hashing method you can pass this param
- * structure in cm_param to fine-tune the algorithm's defaults.
- */
-typedef struct skein_param {
- size_t sp_digest_bitlen; /* length of digest in bits */
-} skein_param_t;
-
-/* Module definitions */
-#ifdef SKEIN_MODULE_IMPL
-#define CKM_SKEIN_256 "CKM_SKEIN_256"
-#define CKM_SKEIN_512 "CKM_SKEIN_512"
-#define CKM_SKEIN1024 "CKM_SKEIN1024"
-#define CKM_SKEIN_256_MAC "CKM_SKEIN_256_MAC"
-#define CKM_SKEIN_512_MAC "CKM_SKEIN_512_MAC"
-#define CKM_SKEIN1024_MAC "CKM_SKEIN1024_MAC"
-
-typedef enum skein_mech_type {
- SKEIN_256_MECH_INFO_TYPE,
- SKEIN_512_MECH_INFO_TYPE,
- SKEIN1024_MECH_INFO_TYPE,
- SKEIN_256_MAC_MECH_INFO_TYPE,
- SKEIN_512_MAC_MECH_INFO_TYPE,
- SKEIN1024_MAC_MECH_INFO_TYPE
-} skein_mech_type_t;
-
-#define VALID_SKEIN_DIGEST_MECH(__mech) \
- ((int)(__mech) >= SKEIN_256_MECH_INFO_TYPE && \
- (__mech) <= SKEIN1024_MECH_INFO_TYPE)
-#define VALID_SKEIN_MAC_MECH(__mech) \
- ((int)(__mech) >= SKEIN_256_MAC_MECH_INFO_TYPE && \
- (__mech) <= SKEIN1024_MAC_MECH_INFO_TYPE)
-#endif /* SKEIN_MODULE_IMPL */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* _SYS_SKEIN_H_ */
projects / mirror_ubuntu-bionic-kernel.git / blobdiff