diff options
Diffstat (limited to 'drivers/staging/skein/skeinBlockNo3F.c')
| -rw-r--r-- | drivers/staging/skein/skeinBlockNo3F.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/drivers/staging/skein/skeinBlockNo3F.c b/drivers/staging/skein/skeinBlockNo3F.c new file mode 100644 index 000000000000..bf4f2bf33ebf --- /dev/null +++ b/drivers/staging/skein/skeinBlockNo3F.c @@ -0,0 +1,172 @@ + +#include <string.h> +#include <skein.h> +#include <threefishApi.h> + + +/***************************** Skein_256 ******************************/ +void Skein_256_Process_Block(Skein_256_Ctxt_t *ctx, const u08b_t *blkPtr, + size_t blkCnt, size_t byteCntAdd) +{ + ThreefishKey_t key; + u64b_t tweak[2]; + int i; + u64b_t w[SKEIN_256_STATE_WORDS]; /* local copy of input block */ + u64b_t words[3]; + + Skein_assert(blkCnt != 0); /* never call with blkCnt == 0! */ + tweak[0] = ctx->h.T[0]; + tweak[1] = ctx->h.T[1]; + + do { + u64b_t carry = byteCntAdd; + + words[0] = tweak[0] & 0xffffffffL; + words[1] = ((tweak[0] >> 32) & 0xffffffffL); + words[2] = (tweak[1] & 0xffffffffL); + + for (i = 0; i < 3; i++) { + carry += words[i]; + words[i] = carry; + carry >>= 32; + } + tweak[0] = words[0] & 0xffffffffL; + tweak[0] |= (words[1] & 0xffffffffL) << 32; + tweak[1] |= words[2] & 0xffffffffL; + + threefishSetKey(&key, Threefish256, ctx->X, tweak); + + Skein_Get64_LSB_First(w, blkPtr, SKEIN_256_STATE_WORDS); /* get input block in little-endian format */ + + threefishEncryptBlockWords(&key, w, ctx->X); + + blkPtr += SKEIN_256_BLOCK_BYTES; + + /* do the final "feedforward" xor, update context chaining vars */ + ctx->X[0] = ctx->X[0] ^ w[0]; + ctx->X[1] = ctx->X[1] ^ w[1]; + ctx->X[2] = ctx->X[2] ^ w[2]; + ctx->X[3] = ctx->X[3] ^ w[3]; + + tweak[1] &= ~SKEIN_T1_FLAG_FIRST; + } while (--blkCnt); + + ctx->h.T[0] = tweak[0]; + ctx->h.T[1] = tweak[1]; +} + +void Skein_512_Process_Block(Skein_512_Ctxt_t *ctx, const u08b_t *blkPtr, + size_t blkCnt, size_t byteCntAdd) +{ + ThreefishKey_t key; + u64b_t tweak[2]; + int i; + u64b_t words[3]; + u64b_t w[SKEIN_512_STATE_WORDS]; /* local copy of input block */ + + Skein_assert(blkCnt != 0); /* never call with blkCnt == 0! */ + tweak[0] = ctx->h.T[0]; + tweak[1] = ctx->h.T[1]; + + do { + u64b_t carry = byteCntAdd; + + words[0] = tweak[0] & 0xffffffffL; + words[1] = ((tweak[0] >> 32) & 0xffffffffL); + words[2] = (tweak[1] & 0xffffffffL); + + for (i = 0; i < 3; i++) { + carry += words[i]; + words[i] = carry; + carry >>= 32; + } + tweak[0] = words[0] & 0xffffffffL; + tweak[0] |= (words[1] & 0xffffffffL) << 32; + tweak[1] |= words[2] & 0xffffffffL; + + threefishSetKey(&key, Threefish512, ctx->X, tweak); + + Skein_Get64_LSB_First(w, blkPtr, SKEIN_512_STATE_WORDS); /* get input block in little-endian format */ + + threefishEncryptBlockWords(&key, w, ctx->X); + + blkPtr += SKEIN_512_BLOCK_BYTES; + + /* do the final "feedforward" xor, update context chaining vars */ + ctx->X[0] = ctx->X[0] ^ w[0]; + ctx->X[1] = ctx->X[1] ^ w[1]; + ctx->X[2] = ctx->X[2] ^ w[2]; + ctx->X[3] = ctx->X[3] ^ w[3]; + ctx->X[4] = ctx->X[4] ^ w[4]; + ctx->X[5] = ctx->X[5] ^ w[5]; + ctx->X[6] = ctx->X[6] ^ w[6]; + ctx->X[7] = ctx->X[7] ^ w[7]; + + tweak[1] &= ~SKEIN_T1_FLAG_FIRST; + } while (--blkCnt); + + ctx->h.T[0] = tweak[0]; + ctx->h.T[1] = tweak[1]; +} + +void Skein1024_Process_Block(Skein1024_Ctxt_t *ctx, const u08b_t *blkPtr, + size_t blkCnt, size_t byteCntAdd) +{ + ThreefishKey_t key; + u64b_t tweak[2]; + int i; + u64b_t words[3]; + u64b_t w[SKEIN1024_STATE_WORDS]; /* local copy of input block */ + + Skein_assert(blkCnt != 0); /* never call with blkCnt == 0! */ + tweak[0] = ctx->h.T[0]; + tweak[1] = ctx->h.T[1]; + + do { + u64b_t carry = byteCntAdd; + + words[0] = tweak[0] & 0xffffffffL; + words[1] = ((tweak[0] >> 32) & 0xffffffffL); + words[2] = (tweak[1] & 0xffffffffL); + + for (i = 0; i < 3; i++) { + carry += words[i]; + words[i] = carry; + carry >>= 32; + } + tweak[0] = words[0] & 0xffffffffL; + tweak[0] |= (words[1] & 0xffffffffL) << 32; + tweak[1] |= words[2] & 0xffffffffL; + + threefishSetKey(&key, Threefish1024, ctx->X, tweak); + + Skein_Get64_LSB_First(w, blkPtr, SKEIN1024_STATE_WORDS); /* get input block in little-endian format */ + + threefishEncryptBlockWords(&key, w, ctx->X); + + blkPtr += SKEIN1024_BLOCK_BYTES; + + /* do the final "feedforward" xor, update context chaining vars */ + ctx->X[ 0] = ctx->X[ 0] ^ w[ 0]; + ctx->X[ 1] = ctx->X[ 1] ^ w[ 1]; + ctx->X[ 2] = ctx->X[ 2] ^ w[ 2]; + ctx->X[ 3] = ctx->X[ 3] ^ w[ 3]; + ctx->X[ 4] = ctx->X[ 4] ^ w[ 4]; + ctx->X[ 5] = ctx->X[ 5] ^ w[ 5]; + ctx->X[ 6] = ctx->X[ 6] ^ w[ 6]; + ctx->X[ 7] = ctx->X[ 7] ^ w[ 7]; + ctx->X[ 8] = ctx->X[ 8] ^ w[ 8]; + ctx->X[ 9] = ctx->X[ 9] ^ w[ 9]; + ctx->X[10] = ctx->X[10] ^ w[10]; + ctx->X[11] = ctx->X[11] ^ w[11]; + ctx->X[12] = ctx->X[12] ^ w[12]; + ctx->X[13] = ctx->X[13] ^ w[13]; + ctx->X[14] = ctx->X[14] ^ w[14]; + ctx->X[15] = ctx->X[15] ^ w[15]; + + tweak[1] &= ~SKEIN_T1_FLAG_FIRST; + } while (--blkCnt); + + ctx->h.T[0] = tweak[0]; + ctx->h.T[1] = tweak[1]; +} |