[PATCH v3 1/2] staging: skein: Adds CryptoAPI Support
From: Eric Rost
Date: Thu Oct 23 2014 - 18:14:25 EST
Adds CryptoAPI support for skein256, skein512, and skein1024
algorithms. Also collapses threefish algorithm into skein.o and removes
Kconfig option for Threefish.
Signed-off-by: Eric Rost <eric.rost@xxxxxxxxxxxxx>
---
drivers/staging/skein/Kconfig | 22 +-
drivers/staging/skein/Makefile | 13 +-
drivers/staging/skein/skein.c | 883 ---------------------------------
drivers/staging/skein/skein.h | 346 -------------
drivers/staging/skein/skein_api.h | 2 +-
drivers/staging/skein/skein_base.c | 884 ++++++++++++++++++++++++++++++++++
drivers/staging/skein/skein_base.h | 351 ++++++++++++++
drivers/staging/skein/skein_block.c | 2 +-
drivers/staging/skein/skein_block.h | 2 +-
drivers/staging/skein/skein_generic.c | 194 ++++++++
drivers/staging/skein/skein_iv.h | 2 +-
drivers/staging/skein/threefish_api.h | 2 +-
12 files changed, 1444 insertions(+), 1259 deletions(-)
delete mode 100644 drivers/staging/skein/skein.c
delete mode 100644 drivers/staging/skein/skein.h
create mode 100644 drivers/staging/skein/skein_base.c
create mode 100644 drivers/staging/skein/skein_base.h
create mode 100644 drivers/staging/skein/skein_generic.c
diff --git a/drivers/staging/skein/Kconfig b/drivers/staging/skein/Kconfig
index b9172bf..de8bdd7 100644
--- a/drivers/staging/skein/Kconfig
+++ b/drivers/staging/skein/Kconfig
@@ -1,8 +1,8 @@
config CRYPTO_SKEIN
bool "Skein digest algorithm"
depends on (X86 || UML_X86) && 64BIT && CRYPTO
- select CRYPTO_THREEFISH
select CRYPTO_HASH
+ select CRYPTO_ALGAPI
help
Skein secure hash algorithm is one of 5 finalists from the NIST SHA3
competition.
@@ -12,21 +12,5 @@ config CRYPTO_SKEIN
http://www.skein-hash.info/sites/default/files/skein1.3.pdf
- for more information. This module depends on the threefish block
- cipher module.
-
-config CRYPTO_THREEFISH
- bool "Threefish tweakable block cipher"
- depends on (X86 || UML_X86) && 64BIT && CRYPTO
- select CRYPTO_ALGAPI
- help
- Threefish cipher algorithm is the tweakable block cipher underneath
- the Skein family of secure hash algorithms. Skein is one of 5
- finalists from the NIST SHA3 competition.
-
- Skein is optimized for modern, 64bit processors and is highly
- customizable. See:
-
- http://www.skein-hash.info/sites/default/files/skein1.3.pdf
-
- for more information.
+ for more information. This module also contains the threefish block
+ cipher algorithm.
diff --git a/drivers/staging/skein/Makefile b/drivers/staging/skein/Makefile
index a14aadd..66c8799 100644
--- a/drivers/staging/skein/Makefile
+++ b/drivers/staging/skein/Makefile
@@ -1,9 +1,10 @@
#
# Makefile for the skein secure hash algorithm
#
-obj-$(CONFIG_CRYPTO_SKEIN) += skein.o \
- skein_api.o \
- skein_block.o
-
-obj-$(CONFIG_CRYPTO_THREEFISH) += threefish_block.o \
- threefish_api.o
+obj-$(CONFIG_CRYPTO_SKEIN) += skein.o
+skein-y := skein_base.o \
+ skein_api.o \
+ skein_block.o \
+ threefish_block.o \
+ threefish_api.o \
+ skein_generic.o
diff --git a/drivers/staging/skein/skein.c b/drivers/staging/skein/skein.c
deleted file mode 100644
index 8cc8358..0000000
--- a/drivers/staging/skein/skein.c
+++ /dev/null
@@ -1,883 +0,0 @@
-/***********************************************************************
-**
-** Implementation of the Skein hash function.
-**
-** Source code author: Doug Whiting, 2008.
-**
-** This algorithm and source code is released to the public domain.
-**
-************************************************************************/
-
-#define SKEIN_PORT_CODE /* instantiate any code in skein_port.h */
-
-#include <linux/string.h> /* get the memcpy/memset functions */
-#include "skein.h" /* get the Skein API definitions */
-#include "skein_iv.h" /* get precomputed IVs */
-#include "skein_block.h"
-
-/*****************************************************************/
-/* 256-bit Skein */
-/*****************************************************************/
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* init the context for a straight hashing operation */
-int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len)
-{
- union {
- u8 b[SKEIN_256_STATE_BYTES];
- u64 w[SKEIN_256_STATE_WORDS];
- } cfg; /* config block */
-
- skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
- ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
-
- switch (hash_bit_len) { /* use pre-computed values, where available */
- case 256:
- memcpy(ctx->x, SKEIN_256_IV_256, sizeof(ctx->x));
- break;
- case 224:
- memcpy(ctx->x, SKEIN_256_IV_224, sizeof(ctx->x));
- break;
- case 160:
- memcpy(ctx->x, SKEIN_256_IV_160, sizeof(ctx->x));
- break;
- case 128:
- memcpy(ctx->x, SKEIN_256_IV_128, sizeof(ctx->x));
- break;
- default:
- /* here if there is no precomputed IV value available */
- /*
- * build/process the config block, type == CONFIG (could be
- * precomputed)
- */
- /* set tweaks: T0=0; T1=CFG | FINAL */
- skein_start_new_type(ctx, CFG_FINAL);
-
- /* set the schema, version */
- cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
- /* hash result length in bits */
- cfg.w[1] = skein_swap64(hash_bit_len);
- cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
- /* zero pad config block */
- memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0]));
-
- /* compute the initial chaining values from config block */
- /* zero the chaining variables */
- memset(ctx->x, 0, sizeof(ctx->x));
- skein_256_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
- break;
- }
- /* The chaining vars ctx->x are now initialized for hash_bit_len. */
- /* Set up to process the data message portion of the hash (default) */
- skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* init the context for a MAC and/or tree hash operation */
-/* [identical to skein_256_init() when key_bytes == 0 && \
- * tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */
-int skein_256_init_ext(struct skein_256_ctx *ctx, size_t hash_bit_len,
- u64 tree_info, const u8 *key, size_t key_bytes)
-{
- union {
- u8 b[SKEIN_256_STATE_BYTES];
- u64 w[SKEIN_256_STATE_WORDS];
- } cfg; /* config block */
-
- skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
- skein_assert_ret(key_bytes == 0 || key != NULL, SKEIN_FAIL);
-
- /* compute the initial chaining values ctx->x[], based on key */
- if (key_bytes == 0) { /* is there a key? */
- /* no key: use all zeroes as key for config block */
- memset(ctx->x, 0, sizeof(ctx->x));
- } else { /* here to pre-process a key */
- skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
- /* do a mini-Init right here */
- /* set output hash bit count = state size */
- ctx->h.hash_bit_len = 8*sizeof(ctx->x);
- /* set tweaks: T0 = 0; T1 = KEY type */
- skein_start_new_type(ctx, KEY);
- /* zero the initial chaining variables */
- memset(ctx->x, 0, sizeof(ctx->x));
- /* hash the key */
- skein_256_update(ctx, key, key_bytes);
- /* put result into cfg.b[] */
- skein_256_final_pad(ctx, cfg.b);
- /* copy over into ctx->x[] */
- memcpy(ctx->x, cfg.b, sizeof(cfg.b));
- }
- /*
- * build/process the config block, type == CONFIG (could be
- * precomputed for each key)
- */
- /* output hash bit count */
- ctx->h.hash_bit_len = hash_bit_len;
- skein_start_new_type(ctx, CFG_FINAL);
-
- /* pre-pad cfg.w[] with zeroes */
- memset(&cfg.w, 0, sizeof(cfg.w));
- cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
- /* hash result length in bits */
- cfg.w[1] = skein_swap64(hash_bit_len);
- /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
- cfg.w[2] = skein_swap64(tree_info);
-
- skein_show_key(256, &ctx->h, key, key_bytes);
-
- /* compute the initial chaining values from config block */
- skein_256_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
-
- /* The chaining vars ctx->x are now initialized */
- /* Set up to process the data message portion of the hash (default) */
- skein_start_new_type(ctx, MSG);
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* process the input bytes */
-int skein_256_update(struct skein_256_ctx *ctx, const u8 *msg,
- size_t msg_byte_cnt)
-{
- size_t n;
-
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
-
- /* process full blocks, if any */
- if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_256_BLOCK_BYTES) {
- /* finish up any buffered message data */
- if (ctx->h.b_cnt) {
- /* # bytes free in buffer b[] */
- n = SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt;
- if (n) {
- /* check on our logic here */
- skein_assert(n < msg_byte_cnt);
- memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
- msg_byte_cnt -= n;
- msg += n;
- ctx->h.b_cnt += n;
- }
- skein_assert(ctx->h.b_cnt == SKEIN_256_BLOCK_BYTES);
- skein_256_process_block(ctx, ctx->b, 1,
- SKEIN_256_BLOCK_BYTES);
- ctx->h.b_cnt = 0;
- }
- /*
- * now process any remaining full blocks, directly from input
- * message data
- */
- if (msg_byte_cnt > SKEIN_256_BLOCK_BYTES) {
- /* number of full blocks to process */
- n = (msg_byte_cnt-1) / SKEIN_256_BLOCK_BYTES;
- skein_256_process_block(ctx, msg, n,
- SKEIN_256_BLOCK_BYTES);
- msg_byte_cnt -= n * SKEIN_256_BLOCK_BYTES;
- msg += n * SKEIN_256_BLOCK_BYTES;
- }
- skein_assert(ctx->h.b_cnt == 0);
- }
-
- /* copy any remaining source message data bytes into b[] */
- if (msg_byte_cnt) {
- skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
- SKEIN_256_BLOCK_BYTES);
- memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
- ctx->h.b_cnt += msg_byte_cnt;
- }
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* finalize the hash computation and output the result */
-int skein_256_final(struct skein_256_ctx *ctx, u8 *hash_val)
-{
- size_t i, n, byte_cnt;
- u64 x[SKEIN_256_STATE_WORDS];
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
-
- /* tag as the final block */
- ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
- /* zero pad b[] if necessary */
- if (ctx->h.b_cnt < SKEIN_256_BLOCK_BYTES)
- memset(&ctx->b[ctx->h.b_cnt], 0,
- SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt);
-
- /* process the final block */
- skein_256_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
-
- /* now output the result */
- /* total number of output bytes */
- byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
-
- /* run Threefish in "counter mode" to generate output */
- /* zero out b[], so it can hold the counter */
- memset(ctx->b, 0, sizeof(ctx->b));
- /* keep a local copy of counter mode "key" */
- memcpy(x, ctx->x, sizeof(x));
- for (i = 0; i*SKEIN_256_BLOCK_BYTES < byte_cnt; i++) {
- /* build the counter block */
- ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
- skein_start_new_type(ctx, OUT_FINAL);
- /* run "counter mode" */
- skein_256_process_block(ctx, ctx->b, 1, sizeof(u64));
- /* number of output bytes left to go */
- n = byte_cnt - i*SKEIN_256_BLOCK_BYTES;
- if (n >= SKEIN_256_BLOCK_BYTES)
- n = SKEIN_256_BLOCK_BYTES;
- /* "output" the ctr mode bytes */
- skein_put64_lsb_first(hash_val+i*SKEIN_256_BLOCK_BYTES, ctx->x,
- n);
- skein_show_final(256, &ctx->h, n,
- hash_val+i*SKEIN_256_BLOCK_BYTES);
- /* restore the counter mode key for next time */
- memcpy(ctx->x, x, sizeof(x));
- }
- return SKEIN_SUCCESS;
-}
-
-/*****************************************************************/
-/* 512-bit Skein */
-/*****************************************************************/
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* init the context for a straight hashing operation */
-int skein_512_init(struct skein_512_ctx *ctx, size_t hash_bit_len)
-{
- union {
- u8 b[SKEIN_512_STATE_BYTES];
- u64 w[SKEIN_512_STATE_WORDS];
- } cfg; /* config block */
-
- skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
- ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
-
- switch (hash_bit_len) { /* use pre-computed values, where available */
- case 512:
- memcpy(ctx->x, SKEIN_512_IV_512, sizeof(ctx->x));
- break;
- case 384:
- memcpy(ctx->x, SKEIN_512_IV_384, sizeof(ctx->x));
- break;
- case 256:
- memcpy(ctx->x, SKEIN_512_IV_256, sizeof(ctx->x));
- break;
- case 224:
- memcpy(ctx->x, SKEIN_512_IV_224, sizeof(ctx->x));
- break;
- default:
- /* here if there is no precomputed IV value available */
- /*
- * build/process the config block, type == CONFIG (could be
- * precomputed)
- */
- /* set tweaks: T0=0; T1=CFG | FINAL */
- skein_start_new_type(ctx, CFG_FINAL);
-
- /* set the schema, version */
- cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
- /* hash result length in bits */
- cfg.w[1] = skein_swap64(hash_bit_len);
- cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
- /* zero pad config block */
- memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0]));
-
- /* compute the initial chaining values from config block */
- /* zero the chaining variables */
- memset(ctx->x, 0, sizeof(ctx->x));
- skein_512_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
- break;
- }
-
- /*
- * The chaining vars ctx->x are now initialized for the given
- * hash_bit_len.
- */
- /* Set up to process the data message portion of the hash (default) */
- skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* init the context for a MAC and/or tree hash operation */
-/* [identical to skein_512_init() when key_bytes == 0 && \
- * tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */
-int skein_512_init_ext(struct skein_512_ctx *ctx, size_t hash_bit_len,
- u64 tree_info, const u8 *key, size_t key_bytes)
-{
- union {
- u8 b[SKEIN_512_STATE_BYTES];
- u64 w[SKEIN_512_STATE_WORDS];
- } cfg; /* config block */
-
- skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
- skein_assert_ret(key_bytes == 0 || key != NULL, SKEIN_FAIL);
-
- /* compute the initial chaining values ctx->x[], based on key */
- if (key_bytes == 0) { /* is there a key? */
- /* no key: use all zeroes as key for config block */
- memset(ctx->x, 0, sizeof(ctx->x));
- } else { /* here to pre-process a key */
- skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
- /* do a mini-Init right here */
- /* set output hash bit count = state size */
- ctx->h.hash_bit_len = 8*sizeof(ctx->x);
- /* set tweaks: T0 = 0; T1 = KEY type */
- skein_start_new_type(ctx, KEY);
- /* zero the initial chaining variables */
- memset(ctx->x, 0, sizeof(ctx->x));
- /* hash the key */
- skein_512_update(ctx, key, key_bytes);
- /* put result into cfg.b[] */
- skein_512_final_pad(ctx, cfg.b);
- /* copy over into ctx->x[] */
- memcpy(ctx->x, cfg.b, sizeof(cfg.b));
- }
- /*
- * build/process the config block, type == CONFIG (could be
- * precomputed for each key)
- */
- ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
- skein_start_new_type(ctx, CFG_FINAL);
-
- /* pre-pad cfg.w[] with zeroes */
- memset(&cfg.w, 0, sizeof(cfg.w));
- cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
- /* hash result length in bits */
- cfg.w[1] = skein_swap64(hash_bit_len);
- /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
- cfg.w[2] = skein_swap64(tree_info);
-
- skein_show_key(512, &ctx->h, key, key_bytes);
-
- /* compute the initial chaining values from config block */
- skein_512_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
-
- /* The chaining vars ctx->x are now initialized */
- /* Set up to process the data message portion of the hash (default) */
- skein_start_new_type(ctx, MSG);
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* process the input bytes */
-int skein_512_update(struct skein_512_ctx *ctx, const u8 *msg,
- size_t msg_byte_cnt)
-{
- size_t n;
-
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
-
- /* process full blocks, if any */
- if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_512_BLOCK_BYTES) {
- /* finish up any buffered message data */
- if (ctx->h.b_cnt) {
- /* # bytes free in buffer b[] */
- n = SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt;
- if (n) {
- /* check on our logic here */
- skein_assert(n < msg_byte_cnt);
- memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
- msg_byte_cnt -= n;
- msg += n;
- ctx->h.b_cnt += n;
- }
- skein_assert(ctx->h.b_cnt == SKEIN_512_BLOCK_BYTES);
- skein_512_process_block(ctx, ctx->b, 1,
- SKEIN_512_BLOCK_BYTES);
- ctx->h.b_cnt = 0;
- }
- /*
- * now process any remaining full blocks, directly from input
- * message data
- */
- if (msg_byte_cnt > SKEIN_512_BLOCK_BYTES) {
- /* number of full blocks to process */
- n = (msg_byte_cnt-1) / SKEIN_512_BLOCK_BYTES;
- skein_512_process_block(ctx, msg, n,
- SKEIN_512_BLOCK_BYTES);
- msg_byte_cnt -= n * SKEIN_512_BLOCK_BYTES;
- msg += n * SKEIN_512_BLOCK_BYTES;
- }
- skein_assert(ctx->h.b_cnt == 0);
- }
-
- /* copy any remaining source message data bytes into b[] */
- if (msg_byte_cnt) {
- skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
- SKEIN_512_BLOCK_BYTES);
- memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
- ctx->h.b_cnt += msg_byte_cnt;
- }
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* finalize the hash computation and output the result */
-int skein_512_final(struct skein_512_ctx *ctx, u8 *hash_val)
-{
- size_t i, n, byte_cnt;
- u64 x[SKEIN_512_STATE_WORDS];
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
-
- /* tag as the final block */
- ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
- /* zero pad b[] if necessary */
- if (ctx->h.b_cnt < SKEIN_512_BLOCK_BYTES)
- memset(&ctx->b[ctx->h.b_cnt], 0,
- SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt);
-
- /* process the final block */
- skein_512_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
-
- /* now output the result */
- /* total number of output bytes */
- byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
-
- /* run Threefish in "counter mode" to generate output */
- /* zero out b[], so it can hold the counter */
- memset(ctx->b, 0, sizeof(ctx->b));
- /* keep a local copy of counter mode "key" */
- memcpy(x, ctx->x, sizeof(x));
- for (i = 0; i*SKEIN_512_BLOCK_BYTES < byte_cnt; i++) {
- /* build the counter block */
- ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
- skein_start_new_type(ctx, OUT_FINAL);
- /* run "counter mode" */
- skein_512_process_block(ctx, ctx->b, 1, sizeof(u64));
- /* number of output bytes left to go */
- n = byte_cnt - i*SKEIN_512_BLOCK_BYTES;
- if (n >= SKEIN_512_BLOCK_BYTES)
- n = SKEIN_512_BLOCK_BYTES;
- /* "output" the ctr mode bytes */
- skein_put64_lsb_first(hash_val+i*SKEIN_512_BLOCK_BYTES, ctx->x,
- n);
- skein_show_final(512, &ctx->h, n,
- hash_val+i*SKEIN_512_BLOCK_BYTES);
- /* restore the counter mode key for next time */
- memcpy(ctx->x, x, sizeof(x));
- }
- return SKEIN_SUCCESS;
-}
-
-/*****************************************************************/
-/* 1024-bit Skein */
-/*****************************************************************/
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* init the context for a straight hashing operation */
-int skein_1024_init(struct skein_1024_ctx *ctx, size_t hash_bit_len)
-{
- union {
- u8 b[SKEIN_1024_STATE_BYTES];
- u64 w[SKEIN_1024_STATE_WORDS];
- } cfg; /* config block */
-
- skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
- ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
-
- switch (hash_bit_len) { /* use pre-computed values, where available */
- case 512:
- memcpy(ctx->x, SKEIN_1024_IV_512, sizeof(ctx->x));
- break;
- case 384:
- memcpy(ctx->x, SKEIN_1024_IV_384, sizeof(ctx->x));
- break;
- case 1024:
- memcpy(ctx->x, SKEIN_1024_IV_1024, sizeof(ctx->x));
- break;
- default:
- /* here if there is no precomputed IV value available */
- /*
- * build/process the config block, type == CONFIG
- * (could be precomputed)
- */
- /* set tweaks: T0=0; T1=CFG | FINAL */
- skein_start_new_type(ctx, CFG_FINAL);
-
- /* set the schema, version */
- cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
- /* hash result length in bits */
- cfg.w[1] = skein_swap64(hash_bit_len);
- cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
- /* zero pad config block */
- memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0]));
-
- /* compute the initial chaining values from config block */
- /* zero the chaining variables */
- memset(ctx->x, 0, sizeof(ctx->x));
- skein_1024_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
- break;
- }
-
- /* The chaining vars ctx->x are now initialized for the hash_bit_len. */
- /* Set up to process the data message portion of the hash (default) */
- skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* init the context for a MAC and/or tree hash operation */
-/* [identical to skein_1024_init() when key_bytes == 0 && \
- * tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */
-int skein_1024_init_ext(struct skein_1024_ctx *ctx, size_t hash_bit_len,
- u64 tree_info, const u8 *key, size_t key_bytes)
-{
- union {
- u8 b[SKEIN_1024_STATE_BYTES];
- u64 w[SKEIN_1024_STATE_WORDS];
- } cfg; /* config block */
-
- skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
- skein_assert_ret(key_bytes == 0 || key != NULL, SKEIN_FAIL);
-
- /* compute the initial chaining values ctx->x[], based on key */
- if (key_bytes == 0) { /* is there a key? */
- /* no key: use all zeroes as key for config block */
- memset(ctx->x, 0, sizeof(ctx->x));
- } else { /* here to pre-process a key */
- skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
- /* do a mini-Init right here */
- /* set output hash bit count = state size */
- ctx->h.hash_bit_len = 8*sizeof(ctx->x);
- /* set tweaks: T0 = 0; T1 = KEY type */
- skein_start_new_type(ctx, KEY);
- /* zero the initial chaining variables */
- memset(ctx->x, 0, sizeof(ctx->x));
- /* hash the key */
- skein_1024_update(ctx, key, key_bytes);
- /* put result into cfg.b[] */
- skein_1024_final_pad(ctx, cfg.b);
- /* copy over into ctx->x[] */
- memcpy(ctx->x, cfg.b, sizeof(cfg.b));
- }
- /*
- * build/process the config block, type == CONFIG (could be
- * precomputed for each key)
- */
- /* output hash bit count */
- ctx->h.hash_bit_len = hash_bit_len;
- skein_start_new_type(ctx, CFG_FINAL);
-
- /* pre-pad cfg.w[] with zeroes */
- memset(&cfg.w, 0, sizeof(cfg.w));
- cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
- /* hash result length in bits */
- cfg.w[1] = skein_swap64(hash_bit_len);
- /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
- cfg.w[2] = skein_swap64(tree_info);
-
- skein_show_key(1024, &ctx->h, key, key_bytes);
-
- /* compute the initial chaining values from config block */
- skein_1024_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
-
- /* The chaining vars ctx->x are now initialized */
- /* Set up to process the data message portion of the hash (default) */
- skein_start_new_type(ctx, MSG);
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* process the input bytes */
-int skein_1024_update(struct skein_1024_ctx *ctx, const u8 *msg,
- size_t msg_byte_cnt)
-{
- size_t n;
-
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
-
- /* process full blocks, if any */
- if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_1024_BLOCK_BYTES) {
- /* finish up any buffered message data */
- if (ctx->h.b_cnt) {
- /* # bytes free in buffer b[] */
- n = SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt;
- if (n) {
- /* check on our logic here */
- skein_assert(n < msg_byte_cnt);
- memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
- msg_byte_cnt -= n;
- msg += n;
- ctx->h.b_cnt += n;
- }
- skein_assert(ctx->h.b_cnt == SKEIN_1024_BLOCK_BYTES);
- skein_1024_process_block(ctx, ctx->b, 1,
- SKEIN_1024_BLOCK_BYTES);
- ctx->h.b_cnt = 0;
- }
- /*
- * now process any remaining full blocks, directly from input
- * message data
- */
- if (msg_byte_cnt > SKEIN_1024_BLOCK_BYTES) {
- /* number of full blocks to process */
- n = (msg_byte_cnt-1) / SKEIN_1024_BLOCK_BYTES;
- skein_1024_process_block(ctx, msg, n,
- SKEIN_1024_BLOCK_BYTES);
- msg_byte_cnt -= n * SKEIN_1024_BLOCK_BYTES;
- msg += n * SKEIN_1024_BLOCK_BYTES;
- }
- skein_assert(ctx->h.b_cnt == 0);
- }
-
- /* copy any remaining source message data bytes into b[] */
- if (msg_byte_cnt) {
- skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
- SKEIN_1024_BLOCK_BYTES);
- memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
- ctx->h.b_cnt += msg_byte_cnt;
- }
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* finalize the hash computation and output the result */
-int skein_1024_final(struct skein_1024_ctx *ctx, u8 *hash_val)
-{
- size_t i, n, byte_cnt;
- u64 x[SKEIN_1024_STATE_WORDS];
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
-
- /* tag as the final block */
- ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
- /* zero pad b[] if necessary */
- if (ctx->h.b_cnt < SKEIN_1024_BLOCK_BYTES)
- memset(&ctx->b[ctx->h.b_cnt], 0,
- SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt);
-
- /* process the final block */
- skein_1024_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
-
- /* now output the result */
- /* total number of output bytes */
- byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
-
- /* run Threefish in "counter mode" to generate output */
- /* zero out b[], so it can hold the counter */
- memset(ctx->b, 0, sizeof(ctx->b));
- /* keep a local copy of counter mode "key" */
- memcpy(x, ctx->x, sizeof(x));
- for (i = 0; i*SKEIN_1024_BLOCK_BYTES < byte_cnt; i++) {
- /* build the counter block */
- ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
- skein_start_new_type(ctx, OUT_FINAL);
- /* run "counter mode" */
- skein_1024_process_block(ctx, ctx->b, 1, sizeof(u64));
- /* number of output bytes left to go */
- n = byte_cnt - i*SKEIN_1024_BLOCK_BYTES;
- if (n >= SKEIN_1024_BLOCK_BYTES)
- n = SKEIN_1024_BLOCK_BYTES;
- /* "output" the ctr mode bytes */
- skein_put64_lsb_first(hash_val+i*SKEIN_1024_BLOCK_BYTES, ctx->x,
- n);
- skein_show_final(1024, &ctx->h, n,
- hash_val+i*SKEIN_1024_BLOCK_BYTES);
- /* restore the counter mode key for next time */
- memcpy(ctx->x, x, sizeof(x));
- }
- return SKEIN_SUCCESS;
-}
-
-/**************** Functions to support MAC/tree hashing ***************/
-/* (this code is identical for Optimized and Reference versions) */
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* finalize the hash computation and output the block, no OUTPUT stage */
-int skein_256_final_pad(struct skein_256_ctx *ctx, u8 *hash_val)
-{
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
-
- /* tag as the final block */
- ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
- /* zero pad b[] if necessary */
- if (ctx->h.b_cnt < SKEIN_256_BLOCK_BYTES)
- memset(&ctx->b[ctx->h.b_cnt], 0,
- SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt);
- /* process the final block */
- skein_256_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
-
- /* "output" the state bytes */
- skein_put64_lsb_first(hash_val, ctx->x, SKEIN_256_BLOCK_BYTES);
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* finalize the hash computation and output the block, no OUTPUT stage */
-int skein_512_final_pad(struct skein_512_ctx *ctx, u8 *hash_val)
-{
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
-
- /* tag as the final block */
- ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
- /* zero pad b[] if necessary */
- if (ctx->h.b_cnt < SKEIN_512_BLOCK_BYTES)
- memset(&ctx->b[ctx->h.b_cnt], 0,
- SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt);
- /* process the final block */
- skein_512_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
-
- /* "output" the state bytes */
- skein_put64_lsb_first(hash_val, ctx->x, SKEIN_512_BLOCK_BYTES);
-
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* finalize the hash computation and output the block, no OUTPUT stage */
-int skein_1024_final_pad(struct skein_1024_ctx *ctx, u8 *hash_val)
-{
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
-
- /* tag as the final block */
- ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
- /* zero pad b[] if necessary */
- if (ctx->h.b_cnt < SKEIN_1024_BLOCK_BYTES)
- memset(&ctx->b[ctx->h.b_cnt], 0,
- SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt);
- /* process the final block */
- skein_1024_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
-
- /* "output" the state bytes */
- skein_put64_lsb_first(hash_val, ctx->x, SKEIN_1024_BLOCK_BYTES);
-
- return SKEIN_SUCCESS;
-}
-
-#if SKEIN_TREE_HASH
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* just do the OUTPUT stage */
-int skein_256_output(struct skein_256_ctx *ctx, u8 *hash_val)
-{
- size_t i, n, byte_cnt;
- u64 x[SKEIN_256_STATE_WORDS];
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
-
- /* now output the result */
- /* total number of output bytes */
- byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
-
- /* run Threefish in "counter mode" to generate output */
- /* zero out b[], so it can hold the counter */
- memset(ctx->b, 0, sizeof(ctx->b));
- /* keep a local copy of counter mode "key" */
- memcpy(x, ctx->x, sizeof(x));
- for (i = 0; i*SKEIN_256_BLOCK_BYTES < byte_cnt; i++) {
- /* build the counter block */
- ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
- skein_start_new_type(ctx, OUT_FINAL);
- /* run "counter mode" */
- skein_256_process_block(ctx, ctx->b, 1, sizeof(u64));
- /* number of output bytes left to go */
- n = byte_cnt - i*SKEIN_256_BLOCK_BYTES;
- if (n >= SKEIN_256_BLOCK_BYTES)
- n = SKEIN_256_BLOCK_BYTES;
- /* "output" the ctr mode bytes */
- skein_put64_lsb_first(hash_val+i*SKEIN_256_BLOCK_BYTES, ctx->x,
- n);
- skein_show_final(256, &ctx->h, n,
- hash_val+i*SKEIN_256_BLOCK_BYTES);
- /* restore the counter mode key for next time */
- memcpy(ctx->x, x, sizeof(x));
- }
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* just do the OUTPUT stage */
-int skein_512_output(struct skein_512_ctx *ctx, u8 *hash_val)
-{
- size_t i, n, byte_cnt;
- u64 x[SKEIN_512_STATE_WORDS];
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
-
- /* now output the result */
- /* total number of output bytes */
- byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
-
- /* run Threefish in "counter mode" to generate output */
- /* zero out b[], so it can hold the counter */
- memset(ctx->b, 0, sizeof(ctx->b));
- /* keep a local copy of counter mode "key" */
- memcpy(x, ctx->x, sizeof(x));
- for (i = 0; i*SKEIN_512_BLOCK_BYTES < byte_cnt; i++) {
- /* build the counter block */
- ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
- skein_start_new_type(ctx, OUT_FINAL);
- /* run "counter mode" */
- skein_512_process_block(ctx, ctx->b, 1, sizeof(u64));
- /* number of output bytes left to go */
- n = byte_cnt - i*SKEIN_512_BLOCK_BYTES;
- if (n >= SKEIN_512_BLOCK_BYTES)
- n = SKEIN_512_BLOCK_BYTES;
- /* "output" the ctr mode bytes */
- skein_put64_lsb_first(hash_val+i*SKEIN_512_BLOCK_BYTES, ctx->x,
- n);
- skein_show_final(256, &ctx->h, n,
- hash_val+i*SKEIN_512_BLOCK_BYTES);
- /* restore the counter mode key for next time */
- memcpy(ctx->x, x, sizeof(x));
- }
- return SKEIN_SUCCESS;
-}
-
-/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
-/* just do the OUTPUT stage */
-int skein_1024_output(struct skein_1024_ctx *ctx, u8 *hash_val)
-{
- size_t i, n, byte_cnt;
- u64 x[SKEIN_1024_STATE_WORDS];
- /* catch uninitialized context */
- skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
-
- /* now output the result */
- /* total number of output bytes */
- byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
-
- /* run Threefish in "counter mode" to generate output */
- /* zero out b[], so it can hold the counter */
- memset(ctx->b, 0, sizeof(ctx->b));
- /* keep a local copy of counter mode "key" */
- memcpy(x, ctx->x, sizeof(x));
- for (i = 0; i*SKEIN_1024_BLOCK_BYTES < byte_cnt; i++) {
- /* build the counter block */
- ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
- skein_start_new_type(ctx, OUT_FINAL);
- /* run "counter mode" */
- skein_1024_process_block(ctx, ctx->b, 1, sizeof(u64));
- /* number of output bytes left to go */
- n = byte_cnt - i*SKEIN_1024_BLOCK_BYTES;
- if (n >= SKEIN_1024_BLOCK_BYTES)
- n = SKEIN_1024_BLOCK_BYTES;
- /* "output" the ctr mode bytes */
- skein_put64_lsb_first(hash_val+i*SKEIN_1024_BLOCK_BYTES, ctx->x,
- n);
- skein_show_final(256, &ctx->h, n,
- hash_val+i*SKEIN_1024_BLOCK_BYTES);
- /* restore the counter mode key for next time */
- memcpy(ctx->x, x, sizeof(x));
- }
- return SKEIN_SUCCESS;
-}
-#endif
diff --git a/drivers/staging/skein/skein.h b/drivers/staging/skein/skein.h
deleted file mode 100644
index e6669f1..0000000
--- a/drivers/staging/skein/skein.h
+++ /dev/null
@@ -1,346 +0,0 @@
-#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
-**
-***************************************************************************/
-
-#ifndef rotl_64
-#define rotl_64(x, N) (((x) << (N)) | ((x) >> (64-(N))))
-#endif
-
-/* below two prototype assume we are handed aligned data */
-#define skein_put64_lsb_first(dst08, src64, b_cnt) memcpy(dst08, src64, b_cnt)
-#define skein_get64_lsb_first(dst64, src08, w_cnt) \
- memcpy(dst64, src08, 8*(w_cnt))
-#define skein_swap64(w64) (w64)
-
-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 SKEIN_1024_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 SKEIN_1024_STATE_BYTES (8*SKEIN_1024_STATE_WORDS)
-
-#define SKEIN_256_STATE_BITS (64*SKEIN_256_STATE_WORDS)
-#define SKEIN_512_STATE_BITS (64*SKEIN_512_STATE_WORDS)
-#define SKEIN_1024_STATE_BITS (64*SKEIN_1024_STATE_WORDS)
-
-#define SKEIN_256_BLOCK_BYTES (8*SKEIN_256_STATE_WORDS)
-#define SKEIN_512_BLOCK_BYTES (8*SKEIN_512_STATE_WORDS)
-#define SKEIN_1024_BLOCK_BYTES (8*SKEIN_1024_STATE_WORDS)
-
-struct skein_ctx_hdr {
- size_t hash_bit_len; /* size of hash result, in bits */
- size_t b_cnt; /* current byte count in buffer b[] */
- u64 tweak[SKEIN_MODIFIER_WORDS]; /* tweak[0]=byte cnt, tweak[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 buf (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 buf (8-byte aligned) */
-};
-
-struct skein_1024_ctx { /* 1024-bit Skein hash context structure */
- struct skein_ctx_hdr h; /* common header context variables */
- u64 x[SKEIN_1024_STATE_WORDS]; /* chaining variables */
- u8 b[SKEIN_1024_BLOCK_BYTES]; /* partial block buf (8-byte aligned) */
-};
-
-/* Skein APIs for (incremental) "straight hashing" */
-int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len);
-int skein_512_init(struct skein_512_ctx *ctx, size_t hash_bit_len);
-int skein_1024_init(struct skein_1024_ctx *ctx, size_t hash_bit_len);
-
-int skein_256_update(struct skein_256_ctx *ctx, const u8 *msg,
- size_t msg_byte_cnt);
-int skein_512_update(struct skein_512_ctx *ctx, const u8 *msg,
- size_t msg_byte_cnt);
-int skein_1024_update(struct skein_1024_ctx *ctx, const u8 *msg,
- size_t msg_byte_cnt);
-
-int skein_256_final(struct skein_256_ctx *ctx, u8 *hash_val);
-int skein_512_final(struct skein_512_ctx *ctx, u8 *hash_val);
-int skein_1024_final(struct skein_1024_ctx *ctx, u8 *hash_val);
-
-/*
-** Skein APIs for "extended" initialization: MAC keys, tree hashing.
-** After an init_ext() call, just use update/final calls as with init().
-**
-** Notes: Same parameters as _init() calls, plus tree_info/key/key_bytes.
-** When key_bytes == 0 and tree_info == SKEIN_SEQUENTIAL,
-** the results of init_ext() are identical to calling init().
-** The function init() may be called once to "precompute" the IV for
-** a given hash_bit_len value, then by saving a copy of the context
-** the IV computation may be avoided in later calls.
-** Similarly, the function init_ext() 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_init_ext(struct skein_256_ctx *ctx, size_t hash_bit_len,
- u64 tree_info, const u8 *key, size_t key_bytes);
-int skein_512_init_ext(struct skein_512_ctx *ctx, size_t hash_bit_len,
- u64 tree_info, const u8 *key, size_t key_bytes);
-int skein_1024_init_ext(struct skein_1024_ctx *ctx, size_t hash_bit_len,
- u64 tree_info, const u8 *key, size_t key_bytes);
-
-/*
-** 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(struct skein_256_ctx *ctx, u8 *hash_val);
-int skein_512_final_pad(struct skein_512_ctx *ctx, u8 *hash_val);
-int skein_1024_final_pad(struct skein_1024_ctx *ctx, u8 *hash_val);
-
-#ifndef SKEIN_TREE_HASH
-#define SKEIN_TREE_HASH (1)
-#endif
-#if SKEIN_TREE_HASH
-int skein_256_output(struct skein_256_ctx *ctx, u8 *hash_val);
-int skein_512_output(struct skein_512_ctx *ctx, u8 *hash_val);
-int skein_1024_output(struct skein_1024_ctx *ctx, u8 *hash_val);
-#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 tweak[1]: bit field starting positions */
-#define SKEIN_T1_BIT(BIT) ((BIT) - 64) /* second word */
-
-#define SKEIN_T1_POS_TREE_LVL SKEIN_T1_BIT(112) /* 112..118 hash tree level */
-#define SKEIN_T1_POS_BIT_PAD SKEIN_T1_BIT(119) /* 119 part. final in byte */
-#define SKEIN_T1_POS_BLK_TYPE SKEIN_T1_BIT(120) /* 120..125 type field `*/
-#define SKEIN_T1_POS_FIRST SKEIN_T1_BIT(126) /* 126 first blk flag */
-#define SKEIN_T1_POS_FINAL SKEIN_T1_BIT(127) /* 127 final blk flag */
-
-/* tweak word tweak[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 tweak[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)
-
-/* tweak word tweak[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) /* pubkey (for digital sigs) */
-#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) (((u64) (SKEIN_BLK_TYPE_##T)) << \
- SKEIN_T1_POS_BLK_TYPE)
-#define SKEIN_T1_BLK_TYPE_KEY SKEIN_T1_BLK_TYPE(KEY) /* for MAC and KDF */
-#define SKEIN_T1_BLK_TYPE_CFG SKEIN_T1_BLK_TYPE(CFG) /* config block */
-#define SKEIN_T1_BLK_TYPE_PERS SKEIN_T1_BLK_TYPE(PERS) /* personalization */
-#define SKEIN_T1_BLK_TYPE_PK SKEIN_T1_BLK_TYPE(PK) /* pubkey (for sigs) */
-#define SKEIN_T1_BLK_TYPE_KDF SKEIN_T1_BLK_TYPE(KDF) /* key ident 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) + (((u64) (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 tree_info 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 (((u64)0xFF) << \
- SKEIN_CFG_TREE_LEAF_SIZE_POS)
-#define SKEIN_CFG_TREE_NODE_SIZE_MSK (((u64)0xFF) << \
- SKEIN_CFG_TREE_NODE_SIZE_POS)
-#define SKEIN_CFG_TREE_MAX_LEVEL_MSK (((u64)0xFF) << \
- SKEIN_CFG_TREE_MAX_LEVEL_POS)
-
-#define SKEIN_CFG_TREE_INFO(leaf, node, max_lvl) \
- ((((u64)(leaf)) << SKEIN_CFG_TREE_LEAF_SIZE_POS) | \
- (((u64)(node)) << SKEIN_CFG_TREE_NODE_SIZE_POS) | \
- (((u64)(max_lvl)) << SKEIN_CFG_TREE_MAX_LEVEL_POS))
-
-/* use as tree_info 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(ctx_ptr, TWK_NUM) ((ctx_ptr)->h.tweak[TWK_NUM])
-#define skein_set_tweak(ctx_ptr, TWK_NUM, t_val) { \
- (ctx_ptr)->h.tweak[TWK_NUM] = (t_val); \
- }
-
-#define skein_get_T0(ctx_ptr) skein_get_tweak(ctx_ptr, 0)
-#define skein_get_T1(ctx_ptr) skein_get_tweak(ctx_ptr, 1)
-#define skein_set_T0(ctx_ptr, T0) skein_set_tweak(ctx_ptr, 0, T0)
-#define skein_set_T1(ctx_ptr, T1) skein_set_tweak(ctx_ptr, 1, T1)
-
-/* set both tweak words at once */
-#define skein_set_T0_T1(ctx_ptr, T0, T1) \
- { \
- skein_set_T0(ctx_ptr, (T0)); \
- skein_set_T1(ctx_ptr, (T1)); \
- }
-
-#define skein_set_type(ctx_ptr, BLK_TYPE) \
- skein_set_T1(ctx_ptr, SKEIN_T1_BLK_TYPE_##BLK_TYPE)
-
-/*
- * setup for starting with a new type:
- * h.tweak[0]=0; h.tweak[1] = NEW_TYPE; h.b_cnt=0;
- */
-#define skein_start_new_type(ctx_ptr, BLK_TYPE) { \
- skein_set_T0_T1(ctx_ptr, 0, SKEIN_T1_FLAG_FIRST | \
- SKEIN_T1_BLK_TYPE_##BLK_TYPE); \
- (ctx_ptr)->h.b_cnt = 0; \
- }
-
-#define skein_clear_first_flag(hdr) { \
- (hdr).tweak[1] &= ~SKEIN_T1_FLAG_FIRST; \
- }
-#define skein_set_bit_pad_flag(hdr) { \
- (hdr).tweak[1] |= SKEIN_T1_FLAG_BIT_PAD; \
- }
-
-#define skein_set_tree_level(hdr, height) { \
- (hdr).tweak[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, blk_ptr, w_ptr, ks_event_ptr, ks_odd_ptr)
-#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, out_ptr)
-#define skein_show_key(bits, ctx, key, key_bytes)
-#endif
-
-/* ignore all asserts, for performance */
-#define skein_assert_ret(x, ret_code)
-#define skein_assert(x)
-
-/*****************************************************************
-** 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,
-
- /* SKEIN_1024 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) /* # rounds for diff block sizes */
-#define SKEIN_512_ROUNDS_TOTAL (72)
-#define SKEIN_1024_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 SKEIN_1024_ROUNDS_TOTAL (8*((((SKEIN_ROUNDS) + 5) % 10) + 5))
-#endif
-
-#endif /* ifndef _SKEIN_H_ */
diff --git a/drivers/staging/skein/skein_api.h b/drivers/staging/skein/skein_api.h
index e02fa19..171b875 100644
--- a/drivers/staging/skein/skein_api.h
+++ b/drivers/staging/skein/skein_api.h
@@ -79,7 +79,7 @@ OTHER DEALINGS IN THE SOFTWARE.
*/
#include <linux/types.h>
-#include "skein.h"
+#include "skein_base.h"
/**
* Which Skein size to use
diff --git a/drivers/staging/skein/skein_base.c b/drivers/staging/skein/skein_base.c
new file mode 100644
index 0000000..e0994ea
--- /dev/null
+++ b/drivers/staging/skein/skein_base.c
@@ -0,0 +1,884 @@
+/***********************************************************************
+**
+** Implementation of the Skein hash function.
+**
+** Source code author: Doug Whiting, 2008.
+**
+** This algorithm and source code is released to the public domain.
+**
+************************************************************************/
+
+#define SKEIN_PORT_CODE /* instantiate any code in skein_port.h */
+
+#include <linux/string.h> /* get the memcpy/memset functions */
+#include <linux/export.h>
+#include "skein_base.h" /* get the Skein API definitions */
+#include "skein_iv.h" /* get precomputed IVs */
+#include "skein_block.h"
+
+/*****************************************************************/
+/* 256-bit Skein */
+/*****************************************************************/
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* init the context for a straight hashing operation */
+int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len)
+{
+ union {
+ u8 b[SKEIN_256_STATE_BYTES];
+ u64 w[SKEIN_256_STATE_WORDS];
+ } cfg; /* config block */
+
+ skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
+ ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
+
+ switch (hash_bit_len) { /* use pre-computed values, where available */
+ case 256:
+ memcpy(ctx->x, SKEIN_256_IV_256, sizeof(ctx->x));
+ break;
+ case 224:
+ memcpy(ctx->x, SKEIN_256_IV_224, sizeof(ctx->x));
+ break;
+ case 160:
+ memcpy(ctx->x, SKEIN_256_IV_160, sizeof(ctx->x));
+ break;
+ case 128:
+ memcpy(ctx->x, SKEIN_256_IV_128, sizeof(ctx->x));
+ break;
+ default:
+ /* here if there is no precomputed IV value available */
+ /*
+ * build/process the config block, type == CONFIG (could be
+ * precomputed)
+ */
+ /* set tweaks: T0=0; T1=CFG | FINAL */
+ skein_start_new_type(ctx, CFG_FINAL);
+
+ /* set the schema, version */
+ cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
+ /* hash result length in bits */
+ cfg.w[1] = skein_swap64(hash_bit_len);
+ cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
+ /* zero pad config block */
+ memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0]));
+
+ /* compute the initial chaining values from config block */
+ /* zero the chaining variables */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ skein_256_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
+ break;
+ }
+ /* The chaining vars ctx->x are now initialized for hash_bit_len. */
+ /* Set up to process the data message portion of the hash (default) */
+ skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* init the context for a MAC and/or tree hash operation */
+/* [identical to skein_256_init() when key_bytes == 0 && \
+ * tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */
+int skein_256_init_ext(struct skein_256_ctx *ctx, size_t hash_bit_len,
+ u64 tree_info, const u8 *key, size_t key_bytes)
+{
+ union {
+ u8 b[SKEIN_256_STATE_BYTES];
+ u64 w[SKEIN_256_STATE_WORDS];
+ } cfg; /* config block */
+
+ skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
+ skein_assert_ret(key_bytes == 0 || key != NULL, SKEIN_FAIL);
+
+ /* compute the initial chaining values ctx->x[], based on key */
+ if (key_bytes == 0) { /* is there a key? */
+ /* no key: use all zeroes as key for config block */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ } else { /* here to pre-process a key */
+ skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
+ /* do a mini-Init right here */
+ /* set output hash bit count = state size */
+ ctx->h.hash_bit_len = 8*sizeof(ctx->x);
+ /* set tweaks: T0 = 0; T1 = KEY type */
+ skein_start_new_type(ctx, KEY);
+ /* zero the initial chaining variables */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ /* hash the key */
+ skein_256_update(ctx, key, key_bytes);
+ /* put result into cfg.b[] */
+ skein_256_final_pad(ctx, cfg.b);
+ /* copy over into ctx->x[] */
+ memcpy(ctx->x, cfg.b, sizeof(cfg.b));
+ }
+ /*
+ * build/process the config block, type == CONFIG (could be
+ * precomputed for each key)
+ */
+ /* output hash bit count */
+ ctx->h.hash_bit_len = hash_bit_len;
+ skein_start_new_type(ctx, CFG_FINAL);
+
+ /* pre-pad cfg.w[] with zeroes */
+ memset(&cfg.w, 0, sizeof(cfg.w));
+ cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
+ /* hash result length in bits */
+ cfg.w[1] = skein_swap64(hash_bit_len);
+ /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
+ cfg.w[2] = skein_swap64(tree_info);
+
+ skein_show_key(256, &ctx->h, key, key_bytes);
+
+ /* compute the initial chaining values from config block */
+ skein_256_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
+
+ /* The chaining vars ctx->x are now initialized */
+ /* Set up to process the data message portion of the hash (default) */
+ skein_start_new_type(ctx, MSG);
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* process the input bytes */
+int skein_256_update(struct skein_256_ctx *ctx, const u8 *msg,
+ size_t msg_byte_cnt)
+{
+ size_t n;
+
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* process full blocks, if any */
+ if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_256_BLOCK_BYTES) {
+ /* finish up any buffered message data */
+ if (ctx->h.b_cnt) {
+ /* # bytes free in buffer b[] */
+ n = SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt;
+ if (n) {
+ /* check on our logic here */
+ skein_assert(n < msg_byte_cnt);
+ memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
+ msg_byte_cnt -= n;
+ msg += n;
+ ctx->h.b_cnt += n;
+ }
+ skein_assert(ctx->h.b_cnt == SKEIN_256_BLOCK_BYTES);
+ skein_256_process_block(ctx, ctx->b, 1,
+ SKEIN_256_BLOCK_BYTES);
+ ctx->h.b_cnt = 0;
+ }
+ /*
+ * now process any remaining full blocks, directly from input
+ * message data
+ */
+ if (msg_byte_cnt > SKEIN_256_BLOCK_BYTES) {
+ /* number of full blocks to process */
+ n = (msg_byte_cnt-1) / SKEIN_256_BLOCK_BYTES;
+ skein_256_process_block(ctx, msg, n,
+ SKEIN_256_BLOCK_BYTES);
+ msg_byte_cnt -= n * SKEIN_256_BLOCK_BYTES;
+ msg += n * SKEIN_256_BLOCK_BYTES;
+ }
+ skein_assert(ctx->h.b_cnt == 0);
+ }
+
+ /* copy any remaining source message data bytes into b[] */
+ if (msg_byte_cnt) {
+ skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
+ SKEIN_256_BLOCK_BYTES);
+ memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
+ ctx->h.b_cnt += msg_byte_cnt;
+ }
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* finalize the hash computation and output the result */
+int skein_256_final(struct skein_256_ctx *ctx, u8 *hash_val)
+{
+ size_t i, n, byte_cnt;
+ u64 x[SKEIN_256_STATE_WORDS];
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* tag as the final block */
+ ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
+ /* zero pad b[] if necessary */
+ if (ctx->h.b_cnt < SKEIN_256_BLOCK_BYTES)
+ memset(&ctx->b[ctx->h.b_cnt], 0,
+ SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt);
+
+ /* process the final block */
+ skein_256_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
+
+ /* now output the result */
+ /* total number of output bytes */
+ byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
+
+ /* run Threefish in "counter mode" to generate output */
+ /* zero out b[], so it can hold the counter */
+ memset(ctx->b, 0, sizeof(ctx->b));
+ /* keep a local copy of counter mode "key" */
+ memcpy(x, ctx->x, sizeof(x));
+ for (i = 0; i*SKEIN_256_BLOCK_BYTES < byte_cnt; i++) {
+ /* build the counter block */
+ ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
+ skein_start_new_type(ctx, OUT_FINAL);
+ /* run "counter mode" */
+ skein_256_process_block(ctx, ctx->b, 1, sizeof(u64));
+ /* number of output bytes left to go */
+ n = byte_cnt - i*SKEIN_256_BLOCK_BYTES;
+ if (n >= SKEIN_256_BLOCK_BYTES)
+ n = SKEIN_256_BLOCK_BYTES;
+ /* "output" the ctr mode bytes */
+ skein_put64_lsb_first(hash_val+i*SKEIN_256_BLOCK_BYTES, ctx->x,
+ n);
+ skein_show_final(256, &ctx->h, n,
+ hash_val+i*SKEIN_256_BLOCK_BYTES);
+ /* restore the counter mode key for next time */
+ memcpy(ctx->x, x, sizeof(x));
+ }
+ return SKEIN_SUCCESS;
+}
+
+/*****************************************************************/
+/* 512-bit Skein */
+/*****************************************************************/
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* init the context for a straight hashing operation */
+int skein_512_init(struct skein_512_ctx *ctx, size_t hash_bit_len)
+{
+ union {
+ u8 b[SKEIN_512_STATE_BYTES];
+ u64 w[SKEIN_512_STATE_WORDS];
+ } cfg; /* config block */
+
+ skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
+ ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
+
+ switch (hash_bit_len) { /* use pre-computed values, where available */
+ case 512:
+ memcpy(ctx->x, SKEIN_512_IV_512, sizeof(ctx->x));
+ break;
+ case 384:
+ memcpy(ctx->x, SKEIN_512_IV_384, sizeof(ctx->x));
+ break;
+ case 256:
+ memcpy(ctx->x, SKEIN_512_IV_256, sizeof(ctx->x));
+ break;
+ case 224:
+ memcpy(ctx->x, SKEIN_512_IV_224, sizeof(ctx->x));
+ break;
+ default:
+ /* here if there is no precomputed IV value available */
+ /*
+ * build/process the config block, type == CONFIG (could be
+ * precomputed)
+ */
+ /* set tweaks: T0=0; T1=CFG | FINAL */
+ skein_start_new_type(ctx, CFG_FINAL);
+
+ /* set the schema, version */
+ cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
+ /* hash result length in bits */
+ cfg.w[1] = skein_swap64(hash_bit_len);
+ cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
+ /* zero pad config block */
+ memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0]));
+
+ /* compute the initial chaining values from config block */
+ /* zero the chaining variables */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ skein_512_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
+ break;
+ }
+
+ /*
+ * The chaining vars ctx->x are now initialized for the given
+ * hash_bit_len.
+ */
+ /* Set up to process the data message portion of the hash (default) */
+ skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* init the context for a MAC and/or tree hash operation */
+/* [identical to skein_512_init() when key_bytes == 0 && \
+ * tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */
+int skein_512_init_ext(struct skein_512_ctx *ctx, size_t hash_bit_len,
+ u64 tree_info, const u8 *key, size_t key_bytes)
+{
+ union {
+ u8 b[SKEIN_512_STATE_BYTES];
+ u64 w[SKEIN_512_STATE_WORDS];
+ } cfg; /* config block */
+
+ skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
+ skein_assert_ret(key_bytes == 0 || key != NULL, SKEIN_FAIL);
+
+ /* compute the initial chaining values ctx->x[], based on key */
+ if (key_bytes == 0) { /* is there a key? */
+ /* no key: use all zeroes as key for config block */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ } else { /* here to pre-process a key */
+ skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
+ /* do a mini-Init right here */
+ /* set output hash bit count = state size */
+ ctx->h.hash_bit_len = 8*sizeof(ctx->x);
+ /* set tweaks: T0 = 0; T1 = KEY type */
+ skein_start_new_type(ctx, KEY);
+ /* zero the initial chaining variables */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ /* hash the key */
+ skein_512_update(ctx, key, key_bytes);
+ /* put result into cfg.b[] */
+ skein_512_final_pad(ctx, cfg.b);
+ /* copy over into ctx->x[] */
+ memcpy(ctx->x, cfg.b, sizeof(cfg.b));
+ }
+ /*
+ * build/process the config block, type == CONFIG (could be
+ * precomputed for each key)
+ */
+ ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
+ skein_start_new_type(ctx, CFG_FINAL);
+
+ /* pre-pad cfg.w[] with zeroes */
+ memset(&cfg.w, 0, sizeof(cfg.w));
+ cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
+ /* hash result length in bits */
+ cfg.w[1] = skein_swap64(hash_bit_len);
+ /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
+ cfg.w[2] = skein_swap64(tree_info);
+
+ skein_show_key(512, &ctx->h, key, key_bytes);
+
+ /* compute the initial chaining values from config block */
+ skein_512_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
+
+ /* The chaining vars ctx->x are now initialized */
+ /* Set up to process the data message portion of the hash (default) */
+ skein_start_new_type(ctx, MSG);
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* process the input bytes */
+int skein_512_update(struct skein_512_ctx *ctx, const u8 *msg,
+ size_t msg_byte_cnt)
+{
+ size_t n;
+
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* process full blocks, if any */
+ if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_512_BLOCK_BYTES) {
+ /* finish up any buffered message data */
+ if (ctx->h.b_cnt) {
+ /* # bytes free in buffer b[] */
+ n = SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt;
+ if (n) {
+ /* check on our logic here */
+ skein_assert(n < msg_byte_cnt);
+ memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
+ msg_byte_cnt -= n;
+ msg += n;
+ ctx->h.b_cnt += n;
+ }
+ skein_assert(ctx->h.b_cnt == SKEIN_512_BLOCK_BYTES);
+ skein_512_process_block(ctx, ctx->b, 1,
+ SKEIN_512_BLOCK_BYTES);
+ ctx->h.b_cnt = 0;
+ }
+ /*
+ * now process any remaining full blocks, directly from input
+ * message data
+ */
+ if (msg_byte_cnt > SKEIN_512_BLOCK_BYTES) {
+ /* number of full blocks to process */
+ n = (msg_byte_cnt-1) / SKEIN_512_BLOCK_BYTES;
+ skein_512_process_block(ctx, msg, n,
+ SKEIN_512_BLOCK_BYTES);
+ msg_byte_cnt -= n * SKEIN_512_BLOCK_BYTES;
+ msg += n * SKEIN_512_BLOCK_BYTES;
+ }
+ skein_assert(ctx->h.b_cnt == 0);
+ }
+
+ /* copy any remaining source message data bytes into b[] */
+ if (msg_byte_cnt) {
+ skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
+ SKEIN_512_BLOCK_BYTES);
+ memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
+ ctx->h.b_cnt += msg_byte_cnt;
+ }
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* finalize the hash computation and output the result */
+int skein_512_final(struct skein_512_ctx *ctx, u8 *hash_val)
+{
+ size_t i, n, byte_cnt;
+ u64 x[SKEIN_512_STATE_WORDS];
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* tag as the final block */
+ ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
+ /* zero pad b[] if necessary */
+ if (ctx->h.b_cnt < SKEIN_512_BLOCK_BYTES)
+ memset(&ctx->b[ctx->h.b_cnt], 0,
+ SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt);
+
+ /* process the final block */
+ skein_512_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
+
+ /* now output the result */
+ /* total number of output bytes */
+ byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
+
+ /* run Threefish in "counter mode" to generate output */
+ /* zero out b[], so it can hold the counter */
+ memset(ctx->b, 0, sizeof(ctx->b));
+ /* keep a local copy of counter mode "key" */
+ memcpy(x, ctx->x, sizeof(x));
+ for (i = 0; i*SKEIN_512_BLOCK_BYTES < byte_cnt; i++) {
+ /* build the counter block */
+ ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
+ skein_start_new_type(ctx, OUT_FINAL);
+ /* run "counter mode" */
+ skein_512_process_block(ctx, ctx->b, 1, sizeof(u64));
+ /* number of output bytes left to go */
+ n = byte_cnt - i*SKEIN_512_BLOCK_BYTES;
+ if (n >= SKEIN_512_BLOCK_BYTES)
+ n = SKEIN_512_BLOCK_BYTES;
+ /* "output" the ctr mode bytes */
+ skein_put64_lsb_first(hash_val+i*SKEIN_512_BLOCK_BYTES, ctx->x,
+ n);
+ skein_show_final(512, &ctx->h, n,
+ hash_val+i*SKEIN_512_BLOCK_BYTES);
+ /* restore the counter mode key for next time */
+ memcpy(ctx->x, x, sizeof(x));
+ }
+ return SKEIN_SUCCESS;
+}
+
+/*****************************************************************/
+/* 1024-bit Skein */
+/*****************************************************************/
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* init the context for a straight hashing operation */
+int skein_1024_init(struct skein_1024_ctx *ctx, size_t hash_bit_len)
+{
+ union {
+ u8 b[SKEIN_1024_STATE_BYTES];
+ u64 w[SKEIN_1024_STATE_WORDS];
+ } cfg; /* config block */
+
+ skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
+ ctx->h.hash_bit_len = hash_bit_len; /* output hash bit count */
+
+ switch (hash_bit_len) { /* use pre-computed values, where available */
+ case 512:
+ memcpy(ctx->x, SKEIN_1024_IV_512, sizeof(ctx->x));
+ break;
+ case 384:
+ memcpy(ctx->x, SKEIN_1024_IV_384, sizeof(ctx->x));
+ break;
+ case 1024:
+ memcpy(ctx->x, SKEIN_1024_IV_1024, sizeof(ctx->x));
+ break;
+ default:
+ /* here if there is no precomputed IV value available */
+ /*
+ * build/process the config block, type == CONFIG
+ * (could be precomputed)
+ */
+ /* set tweaks: T0=0; T1=CFG | FINAL */
+ skein_start_new_type(ctx, CFG_FINAL);
+
+ /* set the schema, version */
+ cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
+ /* hash result length in bits */
+ cfg.w[1] = skein_swap64(hash_bit_len);
+ cfg.w[2] = skein_swap64(SKEIN_CFG_TREE_INFO_SEQUENTIAL);
+ /* zero pad config block */
+ memset(&cfg.w[3], 0, sizeof(cfg) - 3*sizeof(cfg.w[0]));
+
+ /* compute the initial chaining values from config block */
+ /* zero the chaining variables */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ skein_1024_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
+ break;
+ }
+
+ /* The chaining vars ctx->x are now initialized for the hash_bit_len. */
+ /* Set up to process the data message portion of the hash (default) */
+ skein_start_new_type(ctx, MSG); /* T0=0, T1= MSG type */
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* init the context for a MAC and/or tree hash operation */
+/* [identical to skein_1024_init() when key_bytes == 0 && \
+ * tree_info == SKEIN_CFG_TREE_INFO_SEQUENTIAL] */
+int skein_1024_init_ext(struct skein_1024_ctx *ctx, size_t hash_bit_len,
+ u64 tree_info, const u8 *key, size_t key_bytes)
+{
+ union {
+ u8 b[SKEIN_1024_STATE_BYTES];
+ u64 w[SKEIN_1024_STATE_WORDS];
+ } cfg; /* config block */
+
+ skein_assert_ret(hash_bit_len > 0, SKEIN_BAD_HASHLEN);
+ skein_assert_ret(key_bytes == 0 || key != NULL, SKEIN_FAIL);
+
+ /* compute the initial chaining values ctx->x[], based on key */
+ if (key_bytes == 0) { /* is there a key? */
+ /* no key: use all zeroes as key for config block */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ } else { /* here to pre-process a key */
+ skein_assert(sizeof(cfg.b) >= sizeof(ctx->x));
+ /* do a mini-Init right here */
+ /* set output hash bit count = state size */
+ ctx->h.hash_bit_len = 8*sizeof(ctx->x);
+ /* set tweaks: T0 = 0; T1 = KEY type */
+ skein_start_new_type(ctx, KEY);
+ /* zero the initial chaining variables */
+ memset(ctx->x, 0, sizeof(ctx->x));
+ /* hash the key */
+ skein_1024_update(ctx, key, key_bytes);
+ /* put result into cfg.b[] */
+ skein_1024_final_pad(ctx, cfg.b);
+ /* copy over into ctx->x[] */
+ memcpy(ctx->x, cfg.b, sizeof(cfg.b));
+ }
+ /*
+ * build/process the config block, type == CONFIG (could be
+ * precomputed for each key)
+ */
+ /* output hash bit count */
+ ctx->h.hash_bit_len = hash_bit_len;
+ skein_start_new_type(ctx, CFG_FINAL);
+
+ /* pre-pad cfg.w[] with zeroes */
+ memset(&cfg.w, 0, sizeof(cfg.w));
+ cfg.w[0] = skein_swap64(SKEIN_SCHEMA_VER);
+ /* hash result length in bits */
+ cfg.w[1] = skein_swap64(hash_bit_len);
+ /* tree hash config info (or SKEIN_CFG_TREE_INFO_SEQUENTIAL) */
+ cfg.w[2] = skein_swap64(tree_info);
+
+ skein_show_key(1024, &ctx->h, key, key_bytes);
+
+ /* compute the initial chaining values from config block */
+ skein_1024_process_block(ctx, cfg.b, 1, SKEIN_CFG_STR_LEN);
+
+ /* The chaining vars ctx->x are now initialized */
+ /* Set up to process the data message portion of the hash (default) */
+ skein_start_new_type(ctx, MSG);
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* process the input bytes */
+int skein_1024_update(struct skein_1024_ctx *ctx, const u8 *msg,
+ size_t msg_byte_cnt)
+{
+ size_t n;
+
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* process full blocks, if any */
+ if (msg_byte_cnt + ctx->h.b_cnt > SKEIN_1024_BLOCK_BYTES) {
+ /* finish up any buffered message data */
+ if (ctx->h.b_cnt) {
+ /* # bytes free in buffer b[] */
+ n = SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt;
+ if (n) {
+ /* check on our logic here */
+ skein_assert(n < msg_byte_cnt);
+ memcpy(&ctx->b[ctx->h.b_cnt], msg, n);
+ msg_byte_cnt -= n;
+ msg += n;
+ ctx->h.b_cnt += n;
+ }
+ skein_assert(ctx->h.b_cnt == SKEIN_1024_BLOCK_BYTES);
+ skein_1024_process_block(ctx, ctx->b, 1,
+ SKEIN_1024_BLOCK_BYTES);
+ ctx->h.b_cnt = 0;
+ }
+ /*
+ * now process any remaining full blocks, directly from input
+ * message data
+ */
+ if (msg_byte_cnt > SKEIN_1024_BLOCK_BYTES) {
+ /* number of full blocks to process */
+ n = (msg_byte_cnt-1) / SKEIN_1024_BLOCK_BYTES;
+ skein_1024_process_block(ctx, msg, n,
+ SKEIN_1024_BLOCK_BYTES);
+ msg_byte_cnt -= n * SKEIN_1024_BLOCK_BYTES;
+ msg += n * SKEIN_1024_BLOCK_BYTES;
+ }
+ skein_assert(ctx->h.b_cnt == 0);
+ }
+
+ /* copy any remaining source message data bytes into b[] */
+ if (msg_byte_cnt) {
+ skein_assert(msg_byte_cnt + ctx->h.b_cnt <=
+ SKEIN_1024_BLOCK_BYTES);
+ memcpy(&ctx->b[ctx->h.b_cnt], msg, msg_byte_cnt);
+ ctx->h.b_cnt += msg_byte_cnt;
+ }
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* finalize the hash computation and output the result */
+int skein_1024_final(struct skein_1024_ctx *ctx, u8 *hash_val)
+{
+ size_t i, n, byte_cnt;
+ u64 x[SKEIN_1024_STATE_WORDS];
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* tag as the final block */
+ ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
+ /* zero pad b[] if necessary */
+ if (ctx->h.b_cnt < SKEIN_1024_BLOCK_BYTES)
+ memset(&ctx->b[ctx->h.b_cnt], 0,
+ SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt);
+
+ /* process the final block */
+ skein_1024_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
+
+ /* now output the result */
+ /* total number of output bytes */
+ byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
+
+ /* run Threefish in "counter mode" to generate output */
+ /* zero out b[], so it can hold the counter */
+ memset(ctx->b, 0, sizeof(ctx->b));
+ /* keep a local copy of counter mode "key" */
+ memcpy(x, ctx->x, sizeof(x));
+ for (i = 0; i*SKEIN_1024_BLOCK_BYTES < byte_cnt; i++) {
+ /* build the counter block */
+ ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
+ skein_start_new_type(ctx, OUT_FINAL);
+ /* run "counter mode" */
+ skein_1024_process_block(ctx, ctx->b, 1, sizeof(u64));
+ /* number of output bytes left to go */
+ n = byte_cnt - i*SKEIN_1024_BLOCK_BYTES;
+ if (n >= SKEIN_1024_BLOCK_BYTES)
+ n = SKEIN_1024_BLOCK_BYTES;
+ /* "output" the ctr mode bytes */
+ skein_put64_lsb_first(hash_val+i*SKEIN_1024_BLOCK_BYTES, ctx->x,
+ n);
+ skein_show_final(1024, &ctx->h, n,
+ hash_val+i*SKEIN_1024_BLOCK_BYTES);
+ /* restore the counter mode key for next time */
+ memcpy(ctx->x, x, sizeof(x));
+ }
+ return SKEIN_SUCCESS;
+}
+
+/**************** Functions to support MAC/tree hashing ***************/
+/* (this code is identical for Optimized and Reference versions) */
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* finalize the hash computation and output the block, no OUTPUT stage */
+int skein_256_final_pad(struct skein_256_ctx *ctx, u8 *hash_val)
+{
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* tag as the final block */
+ ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
+ /* zero pad b[] if necessary */
+ if (ctx->h.b_cnt < SKEIN_256_BLOCK_BYTES)
+ memset(&ctx->b[ctx->h.b_cnt], 0,
+ SKEIN_256_BLOCK_BYTES - ctx->h.b_cnt);
+ /* process the final block */
+ skein_256_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
+
+ /* "output" the state bytes */
+ skein_put64_lsb_first(hash_val, ctx->x, SKEIN_256_BLOCK_BYTES);
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* finalize the hash computation and output the block, no OUTPUT stage */
+int skein_512_final_pad(struct skein_512_ctx *ctx, u8 *hash_val)
+{
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* tag as the final block */
+ ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
+ /* zero pad b[] if necessary */
+ if (ctx->h.b_cnt < SKEIN_512_BLOCK_BYTES)
+ memset(&ctx->b[ctx->h.b_cnt], 0,
+ SKEIN_512_BLOCK_BYTES - ctx->h.b_cnt);
+ /* process the final block */
+ skein_512_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
+
+ /* "output" the state bytes */
+ skein_put64_lsb_first(hash_val, ctx->x, SKEIN_512_BLOCK_BYTES);
+
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* finalize the hash computation and output the block, no OUTPUT stage */
+int skein_1024_final_pad(struct skein_1024_ctx *ctx, u8 *hash_val)
+{
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* tag as the final block */
+ ctx->h.tweak[1] |= SKEIN_T1_FLAG_FINAL;
+ /* zero pad b[] if necessary */
+ if (ctx->h.b_cnt < SKEIN_1024_BLOCK_BYTES)
+ memset(&ctx->b[ctx->h.b_cnt], 0,
+ SKEIN_1024_BLOCK_BYTES - ctx->h.b_cnt);
+ /* process the final block */
+ skein_1024_process_block(ctx, ctx->b, 1, ctx->h.b_cnt);
+
+ /* "output" the state bytes */
+ skein_put64_lsb_first(hash_val, ctx->x, SKEIN_1024_BLOCK_BYTES);
+
+ return SKEIN_SUCCESS;
+}
+
+#if SKEIN_TREE_HASH
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* just do the OUTPUT stage */
+int skein_256_output(struct skein_256_ctx *ctx, u8 *hash_val)
+{
+ size_t i, n, byte_cnt;
+ u64 x[SKEIN_256_STATE_WORDS];
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_256_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* now output the result */
+ /* total number of output bytes */
+ byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
+
+ /* run Threefish in "counter mode" to generate output */
+ /* zero out b[], so it can hold the counter */
+ memset(ctx->b, 0, sizeof(ctx->b));
+ /* keep a local copy of counter mode "key" */
+ memcpy(x, ctx->x, sizeof(x));
+ for (i = 0; i*SKEIN_256_BLOCK_BYTES < byte_cnt; i++) {
+ /* build the counter block */
+ ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
+ skein_start_new_type(ctx, OUT_FINAL);
+ /* run "counter mode" */
+ skein_256_process_block(ctx, ctx->b, 1, sizeof(u64));
+ /* number of output bytes left to go */
+ n = byte_cnt - i*SKEIN_256_BLOCK_BYTES;
+ if (n >= SKEIN_256_BLOCK_BYTES)
+ n = SKEIN_256_BLOCK_BYTES;
+ /* "output" the ctr mode bytes */
+ skein_put64_lsb_first(hash_val+i*SKEIN_256_BLOCK_BYTES, ctx->x,
+ n);
+ skein_show_final(256, &ctx->h, n,
+ hash_val+i*SKEIN_256_BLOCK_BYTES);
+ /* restore the counter mode key for next time */
+ memcpy(ctx->x, x, sizeof(x));
+ }
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* just do the OUTPUT stage */
+int skein_512_output(struct skein_512_ctx *ctx, u8 *hash_val)
+{
+ size_t i, n, byte_cnt;
+ u64 x[SKEIN_512_STATE_WORDS];
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_512_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* now output the result */
+ /* total number of output bytes */
+ byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
+
+ /* run Threefish in "counter mode" to generate output */
+ /* zero out b[], so it can hold the counter */
+ memset(ctx->b, 0, sizeof(ctx->b));
+ /* keep a local copy of counter mode "key" */
+ memcpy(x, ctx->x, sizeof(x));
+ for (i = 0; i*SKEIN_512_BLOCK_BYTES < byte_cnt; i++) {
+ /* build the counter block */
+ ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
+ skein_start_new_type(ctx, OUT_FINAL);
+ /* run "counter mode" */
+ skein_512_process_block(ctx, ctx->b, 1, sizeof(u64));
+ /* number of output bytes left to go */
+ n = byte_cnt - i*SKEIN_512_BLOCK_BYTES;
+ if (n >= SKEIN_512_BLOCK_BYTES)
+ n = SKEIN_512_BLOCK_BYTES;
+ /* "output" the ctr mode bytes */
+ skein_put64_lsb_first(hash_val+i*SKEIN_512_BLOCK_BYTES, ctx->x,
+ n);
+ skein_show_final(256, &ctx->h, n,
+ hash_val+i*SKEIN_512_BLOCK_BYTES);
+ /* restore the counter mode key for next time */
+ memcpy(ctx->x, x, sizeof(x));
+ }
+ return SKEIN_SUCCESS;
+}
+
+/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
+/* just do the OUTPUT stage */
+int skein_1024_output(struct skein_1024_ctx *ctx, u8 *hash_val)
+{
+ size_t i, n, byte_cnt;
+ u64 x[SKEIN_1024_STATE_WORDS];
+ /* catch uninitialized context */
+ skein_assert_ret(ctx->h.b_cnt <= SKEIN_1024_BLOCK_BYTES, SKEIN_FAIL);
+
+ /* now output the result */
+ /* total number of output bytes */
+ byte_cnt = (ctx->h.hash_bit_len + 7) >> 3;
+
+ /* run Threefish in "counter mode" to generate output */
+ /* zero out b[], so it can hold the counter */
+ memset(ctx->b, 0, sizeof(ctx->b));
+ /* keep a local copy of counter mode "key" */
+ memcpy(x, ctx->x, sizeof(x));
+ for (i = 0; i*SKEIN_1024_BLOCK_BYTES < byte_cnt; i++) {
+ /* build the counter block */
+ ((u64 *)ctx->b)[0] = skein_swap64((u64) i);
+ skein_start_new_type(ctx, OUT_FINAL);
+ /* run "counter mode" */
+ skein_1024_process_block(ctx, ctx->b, 1, sizeof(u64));
+ /* number of output bytes left to go */
+ n = byte_cnt - i*SKEIN_1024_BLOCK_BYTES;
+ if (n >= SKEIN_1024_BLOCK_BYTES)
+ n = SKEIN_1024_BLOCK_BYTES;
+ /* "output" the ctr mode bytes */
+ skein_put64_lsb_first(hash_val+i*SKEIN_1024_BLOCK_BYTES, ctx->x,
+ n);
+ skein_show_final(256, &ctx->h, n,
+ hash_val+i*SKEIN_1024_BLOCK_BYTES);
+ /* restore the counter mode key for next time */
+ memcpy(ctx->x, x, sizeof(x));
+ }
+ return SKEIN_SUCCESS;
+}
+#endif
diff --git a/drivers/staging/skein/skein_base.h b/drivers/staging/skein/skein_base.h
new file mode 100644
index 0000000..9f10af9
--- /dev/null
+++ b/drivers/staging/skein/skein_base.h
@@ -0,0 +1,351 @@
+#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
+**
+***************************************************************************/
+
+/*Skein digest sizes for crypto api*/
+#define SKEIN256_DIGEST_BIT_SIZE 256
+#define SKEIN512_DIGEST_BIT_SIZE 512
+#define SKEIN1024_DIGEST_BIT_SIZE 1024
+
+#ifndef rotl_64
+#define rotl_64(x, N) (((x) << (N)) | ((x) >> (64-(N))))
+#endif
+
+/* below two prototype assume we are handed aligned data */
+#define skein_put64_lsb_first(dst08, src64, b_cnt) memcpy(dst08, src64, b_cnt)
+#define skein_get64_lsb_first(dst64, src08, w_cnt) \
+ memcpy(dst64, src08, 8*(w_cnt))
+#define skein_swap64(w64) (w64)
+
+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 SKEIN_1024_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 SKEIN_1024_STATE_BYTES (8*SKEIN_1024_STATE_WORDS)
+
+#define SKEIN_256_STATE_BITS (64*SKEIN_256_STATE_WORDS)
+#define SKEIN_512_STATE_BITS (64*SKEIN_512_STATE_WORDS)
+#define SKEIN_1024_STATE_BITS (64*SKEIN_1024_STATE_WORDS)
+
+#define SKEIN_256_BLOCK_BYTES (8*SKEIN_256_STATE_WORDS)
+#define SKEIN_512_BLOCK_BYTES (8*SKEIN_512_STATE_WORDS)
+#define SKEIN_1024_BLOCK_BYTES (8*SKEIN_1024_STATE_WORDS)
+
+struct skein_ctx_hdr {
+ size_t hash_bit_len; /* size of hash result, in bits */
+ size_t b_cnt; /* current byte count in buffer b[] */
+ u64 tweak[SKEIN_MODIFIER_WORDS]; /* tweak[0]=byte cnt, tweak[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 buf (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 buf (8-byte aligned) */
+};
+
+struct skein_1024_ctx { /* 1024-bit Skein hash context structure */
+ struct skein_ctx_hdr h; /* common header context variables */
+ u64 x[SKEIN_1024_STATE_WORDS]; /* chaining variables */
+ u8 b[SKEIN_1024_BLOCK_BYTES]; /* partial block buf (8-byte aligned) */
+};
+
+/* Skein APIs for (incremental) "straight hashing" */
+int skein_256_init(struct skein_256_ctx *ctx, size_t hash_bit_len);
+int skein_512_init(struct skein_512_ctx *ctx, size_t hash_bit_len);
+int skein_1024_init(struct skein_1024_ctx *ctx, size_t hash_bit_len);
+
+int skein_256_update(struct skein_256_ctx *ctx, const u8 *msg,
+ size_t msg_byte_cnt);
+int skein_512_update(struct skein_512_ctx *ctx, const u8 *msg,
+ size_t msg_byte_cnt);
+int skein_1024_update(struct skein_1024_ctx *ctx, const u8 *msg,
+ size_t msg_byte_cnt);
+
+int skein_256_final(struct skein_256_ctx *ctx, u8 *hash_val);
+int skein_512_final(struct skein_512_ctx *ctx, u8 *hash_val);
+int skein_1024_final(struct skein_1024_ctx *ctx, u8 *hash_val);
+
+/*
+** Skein APIs for "extended" initialization: MAC keys, tree hashing.
+** After an init_ext() call, just use update/final calls as with init().
+**
+** Notes: Same parameters as _init() calls, plus tree_info/key/key_bytes.
+** When key_bytes == 0 and tree_info == SKEIN_SEQUENTIAL,
+** the results of init_ext() are identical to calling init().
+** The function init() may be called once to "precompute" the IV for
+** a given hash_bit_len value, then by saving a copy of the context
+** the IV computation may be avoided in later calls.
+** Similarly, the function init_ext() 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_init_ext(struct skein_256_ctx *ctx, size_t hash_bit_len,
+ u64 tree_info, const u8 *key, size_t key_bytes);
+int skein_512_init_ext(struct skein_512_ctx *ctx, size_t hash_bit_len,
+ u64 tree_info, const u8 *key, size_t key_bytes);
+int skein_1024_init_ext(struct skein_1024_ctx *ctx, size_t hash_bit_len,
+ u64 tree_info, const u8 *key, size_t key_bytes);
+
+/*
+** 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(struct skein_256_ctx *ctx, u8 *hash_val);
+int skein_512_final_pad(struct skein_512_ctx *ctx, u8 *hash_val);
+int skein_1024_final_pad(struct skein_1024_ctx *ctx, u8 *hash_val);
+
+#ifndef SKEIN_TREE_HASH
+#define SKEIN_TREE_HASH (1)
+#endif
+#if SKEIN_TREE_HASH
+int skein_256_output(struct skein_256_ctx *ctx, u8 *hash_val);
+int skein_512_output(struct skein_512_ctx *ctx, u8 *hash_val);
+int skein_1024_output(struct skein_1024_ctx *ctx, u8 *hash_val);
+#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 tweak[1]: bit field starting positions */
+#define SKEIN_T1_BIT(BIT) ((BIT) - 64) /* second word */
+
+#define SKEIN_T1_POS_TREE_LVL SKEIN_T1_BIT(112) /* 112..118 hash tree level */
+#define SKEIN_T1_POS_BIT_PAD SKEIN_T1_BIT(119) /* 119 part. final in byte */
+#define SKEIN_T1_POS_BLK_TYPE SKEIN_T1_BIT(120) /* 120..125 type field `*/
+#define SKEIN_T1_POS_FIRST SKEIN_T1_BIT(126) /* 126 first blk flag */
+#define SKEIN_T1_POS_FINAL SKEIN_T1_BIT(127) /* 127 final blk flag */
+
+/* tweak word tweak[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 tweak[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)
+
+/* tweak word tweak[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) /* pubkey (for digital sigs) */
+#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) (((u64) (SKEIN_BLK_TYPE_##T)) << \
+ SKEIN_T1_POS_BLK_TYPE)
+#define SKEIN_T1_BLK_TYPE_KEY SKEIN_T1_BLK_TYPE(KEY) /* for MAC and KDF */
+#define SKEIN_T1_BLK_TYPE_CFG SKEIN_T1_BLK_TYPE(CFG) /* config block */
+#define SKEIN_T1_BLK_TYPE_PERS SKEIN_T1_BLK_TYPE(PERS) /* personalization */
+#define SKEIN_T1_BLK_TYPE_PK SKEIN_T1_BLK_TYPE(PK) /* pubkey (for sigs) */
+#define SKEIN_T1_BLK_TYPE_KDF SKEIN_T1_BLK_TYPE(KDF) /* key ident 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) + (((u64) (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 tree_info 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 (((u64)0xFF) << \
+ SKEIN_CFG_TREE_LEAF_SIZE_POS)
+#define SKEIN_CFG_TREE_NODE_SIZE_MSK (((u64)0xFF) << \
+ SKEIN_CFG_TREE_NODE_SIZE_POS)
+#define SKEIN_CFG_TREE_MAX_LEVEL_MSK (((u64)0xFF) << \
+ SKEIN_CFG_TREE_MAX_LEVEL_POS)
+
+#define SKEIN_CFG_TREE_INFO(leaf, node, max_lvl) \
+ ((((u64)(leaf)) << SKEIN_CFG_TREE_LEAF_SIZE_POS) | \
+ (((u64)(node)) << SKEIN_CFG_TREE_NODE_SIZE_POS) | \
+ (((u64)(max_lvl)) << SKEIN_CFG_TREE_MAX_LEVEL_POS))
+
+/* use as tree_info 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(ctx_ptr, TWK_NUM) ((ctx_ptr)->h.tweak[TWK_NUM])
+#define skein_set_tweak(ctx_ptr, TWK_NUM, t_val) { \
+ (ctx_ptr)->h.tweak[TWK_NUM] = (t_val); \
+ }
+
+#define skein_get_T0(ctx_ptr) skein_get_tweak(ctx_ptr, 0)
+#define skein_get_T1(ctx_ptr) skein_get_tweak(ctx_ptr, 1)
+#define skein_set_T0(ctx_ptr, T0) skein_set_tweak(ctx_ptr, 0, T0)
+#define skein_set_T1(ctx_ptr, T1) skein_set_tweak(ctx_ptr, 1, T1)
+
+/* set both tweak words at once */
+#define skein_set_T0_T1(ctx_ptr, T0, T1) \
+ { \
+ skein_set_T0(ctx_ptr, (T0)); \
+ skein_set_T1(ctx_ptr, (T1)); \
+ }
+
+#define skein_set_type(ctx_ptr, BLK_TYPE) \
+ skein_set_T1(ctx_ptr, SKEIN_T1_BLK_TYPE_##BLK_TYPE)
+
+/*
+ * setup for starting with a new type:
+ * h.tweak[0]=0; h.tweak[1] = NEW_TYPE; h.b_cnt=0;
+ */
+#define skein_start_new_type(ctx_ptr, BLK_TYPE) { \
+ skein_set_T0_T1(ctx_ptr, 0, SKEIN_T1_FLAG_FIRST | \
+ SKEIN_T1_BLK_TYPE_##BLK_TYPE); \
+ (ctx_ptr)->h.b_cnt = 0; \
+ }
+
+#define skein_clear_first_flag(hdr) { \
+ (hdr).tweak[1] &= ~SKEIN_T1_FLAG_FIRST; \
+ }
+#define skein_set_bit_pad_flag(hdr) { \
+ (hdr).tweak[1] |= SKEIN_T1_FLAG_BIT_PAD; \
+ }
+
+#define skein_set_tree_level(hdr, height) { \
+ (hdr).tweak[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, blk_ptr, w_ptr, ks_event_ptr, ks_odd_ptr)
+#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, out_ptr)
+#define skein_show_key(bits, ctx, key, key_bytes)
+#endif
+
+/* ignore all asserts, for performance */
+#define skein_assert_ret(x, ret_code)
+#define skein_assert(x)
+
+/*****************************************************************
+** 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,
+
+ /* SKEIN_1024 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) /* # rounds for diff block sizes */
+#define SKEIN_512_ROUNDS_TOTAL (72)
+#define SKEIN_1024_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 SKEIN_1024_ROUNDS_TOTAL (8*((((SKEIN_ROUNDS) + 5) % 10) + 5))
+#endif
+
+#endif /* ifndef _SKEIN_H_ */
diff --git a/drivers/staging/skein/skein_block.c b/drivers/staging/skein/skein_block.c
index 88bc718..36b0b40 100644
--- a/drivers/staging/skein/skein_block.c
+++ b/drivers/staging/skein/skein_block.c
@@ -15,7 +15,7 @@
************************************************************************/
#include <linux/string.h>
-#include "skein.h"
+#include "skein_base.h"
#include "skein_block.h"
#ifndef SKEIN_USE_ASM
diff --git a/drivers/staging/skein/skein_block.h b/drivers/staging/skein/skein_block.h
index bd7bdc3..9d40f4a 100644
--- a/drivers/staging/skein/skein_block.h
+++ b/drivers/staging/skein/skein_block.h
@@ -10,7 +10,7 @@
#ifndef _SKEIN_BLOCK_H_
#define _SKEIN_BLOCK_H_
-#include "skein.h" /* get the Skein API definitions */
+#include "skein_base.h" /* get the Skein API definitions */
void skein_256_process_block(struct skein_256_ctx *ctx, const u8 *blk_ptr,
size_t blk_cnt, size_t byte_cnt_add);
diff --git a/drivers/staging/skein/skein_generic.c b/drivers/staging/skein/skein_generic.c
new file mode 100644
index 0000000..815f9a4
--- /dev/null
+++ b/drivers/staging/skein/skein_generic.c
@@ -0,0 +1,194 @@
+/*
+ * Cryptographic API.
+ *
+ * Skein256 Hash Algorithm.
+ *
+ * Derived from cryptoapi implementation, adapted for in-place
+ * scatterlist interface.
+ *
+ * Copyright (c) Eric Rost <eric.rost@xxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#include <linux/types.h>
+#include <linux/init.h>
+#include <crypto/internal/hash.h>
+#include "skein_base.h"
+
+
+static int skein256_init(struct shash_desc *desc)
+{
+ return skein_256_init((struct skein_256_ctx *) shash_desc_ctx(desc),
+ SKEIN256_DIGEST_BIT_SIZE);
+}
+
+int skein256_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return skein_256_update((struct skein_256_ctx *) shash_desc_ctx(desc),
+ data, (size_t) len);
+}
+
+/* Add padding and return the message digest. */
+static int skein256_final(struct shash_desc *desc, u8 *out)
+{
+ return skein_256_final((struct skein_256_ctx *) shash_desc_ctx(desc),
+ out);
+}
+
+static int skein256_export(struct shash_desc *desc, void *out)
+{
+ struct skein_256_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+static int skein256_import(struct shash_desc *desc, const void *in)
+{
+ struct skein_256_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+static int skein512_init(struct shash_desc *desc)
+{
+ return skein_512_init((struct skein_512_ctx *) shash_desc_ctx(desc),
+ SKEIN512_DIGEST_BIT_SIZE);
+}
+
+int skein512_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return skein_512_update((struct skein_512_ctx *) shash_desc_ctx(desc),
+ data, (size_t) len);
+}
+
+/* Add padding and return the message digest. */
+static int skein512_final(struct shash_desc *desc, u8 *out)
+{
+ return skein_512_final((struct skein_512_ctx *)
+ shash_desc_ctx(desc), out);
+}
+
+static int skein512_export(struct shash_desc *desc, void *out)
+{
+ struct skein_512_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+static int skein512_import(struct shash_desc *desc, const void *in)
+{
+ struct skein_512_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+static int skein1024_init(struct shash_desc *desc)
+{
+ return skein_1024_init((struct skein_1024_ctx *) shash_desc_ctx(desc),
+ SKEIN1024_DIGEST_BIT_SIZE);
+}
+
+int skein1024_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ return skein_1024_update((struct skein_1024_ctx *) shash_desc_ctx(desc),
+ data, (size_t) len);
+}
+
+/* Add padding and return the message digest. */
+static int skein1024_final(struct shash_desc *desc, u8 *out)
+{
+ return skein_1024_final((struct skein_1024_ctx *) shash_desc_ctx(desc),
+ out);
+}
+
+static int skein1024_export(struct shash_desc *desc, void *out)
+{
+ struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(out, sctx, sizeof(*sctx));
+ return 0;
+}
+
+static int skein1024_import(struct shash_desc *desc, const void *in)
+{
+ struct skein_1024_ctx *sctx = shash_desc_ctx(desc);
+
+ memcpy(sctx, in, sizeof(*sctx));
+ return 0;
+}
+
+static struct shash_alg alg256 = {
+ .digestsize = (SKEIN256_DIGEST_BIT_SIZE / 8),
+ .init = skein256_init,
+ .update = skein256_update,
+ .final = skein256_final,
+ .export = skein256_export,
+ .import = skein256_import,
+ .descsize = sizeof(struct skein_256_ctx),
+ .statesize = sizeof(struct skein_256_ctx),
+ .base = {
+ .cra_name = "skein256",
+ .cra_driver_name = "skein",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_256_BLOCK_BYTES,
+ }
+};
+
+static struct shash_alg alg512 = {
+ .digestsize = (SKEIN512_DIGEST_BIT_SIZE / 8),
+ .init = skein512_init,
+ .update = skein512_update,
+ .final = skein512_final,
+ .export = skein512_export,
+ .import = skein512_import,
+ .descsize = sizeof(struct skein_512_ctx),
+ .statesize = sizeof(struct skein_512_ctx),
+ .base = {
+ .cra_name = "skein512",
+ .cra_driver_name = "skein",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_512_BLOCK_BYTES,
+ }
+};
+
+static struct shash_alg alg1024 = {
+ .digestsize = (SKEIN1024_DIGEST_BIT_SIZE / 8),
+ .init = skein1024_init,
+ .update = skein1024_update,
+ .final = skein1024_final,
+ .export = skein1024_export,
+ .import = skein1024_import,
+ .descsize = sizeof(struct skein_1024_ctx),
+ .statesize = sizeof(struct skein_1024_ctx),
+ .base = {
+ .cra_name = "skein1024",
+ .cra_driver_name = "skein",
+ .cra_flags = CRYPTO_ALG_TYPE_SHASH,
+ .cra_blocksize = SKEIN_1024_BLOCK_BYTES,
+ }
+};
+
+static int __init skein_generic_init(void)
+{
+ if (crypto_register_shash(&alg256) || crypto_register_shash(&alg512)
+ || crypto_register_shash(&alg1024)) {
+ crypto_unregister_shash(&alg256);
+ crypto_unregister_shash(&alg512);
+ crypto_unregister_shash(&alg1024);
+ return -1;
+ }
+ return 0;
+}
+
+device_initcall(skein_generic_init);
diff --git a/drivers/staging/skein/skein_iv.h b/drivers/staging/skein/skein_iv.h
index d9dc1d5..8a06314 100644
--- a/drivers/staging/skein/skein_iv.h
+++ b/drivers/staging/skein/skein_iv.h
@@ -1,7 +1,7 @@
#ifndef _SKEIN_IV_H_
#define _SKEIN_IV_H_
-#include "skein.h" /* get Skein macros and types */
+#include "skein_base.h" /* get Skein macros and types */
/*
***************** Pre-computed Skein IVs *******************
diff --git a/drivers/staging/skein/threefish_api.h b/drivers/staging/skein/threefish_api.h
index 8d5ddf8..8e0a0b7 100644
--- a/drivers/staging/skein/threefish_api.h
+++ b/drivers/staging/skein/threefish_api.h
@@ -29,7 +29,7 @@
*/
#include <linux/types.h>
-#include "skein.h"
+#include "skein_base.h"
#define KEY_SCHEDULE_CONST 0x1BD11BDAA9FC1A22L
--
2.1.1
--
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