Messages in this thread Patch in this message | | | Subject | [PATCH-mm 1/2] crypto: replace private helper with common unaligned endian helper | From | Harvey Harrison <> | Date | Wed, 03 Dec 2008 10:13:39 -0800 |
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Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> --- Depends on the unaligned access work in -mm.
crypto/salsa20_generic.c | 37 ++++++++++++++++--------------------- 1 files changed, 16 insertions(+), 21 deletions(-)
diff --git a/crypto/salsa20_generic.c b/crypto/salsa20_generic.c index b07d559..dbc9e4a 100644 --- a/crypto/salsa20_generic.c +++ b/crypto/salsa20_generic.c @@ -26,6 +26,7 @@ #include <linux/types.h> #include <crypto/algapi.h> #include <asm/byteorder.h> +#include <asm/unaligned.h> #define SALSA20_IV_SIZE 8U #define SALSA20_MIN_KEY_SIZE 16U @@ -46,12 +47,6 @@ Public domain. #define XOR(v,w) ((v) ^ (w)) #define PLUS(v,w) (((v) + (w))) #define PLUSONE(v) (PLUS((v),1)) -#define U32TO8_LITTLE(p, v) \ - { (p)[0] = (v >> 0) & 0xff; (p)[1] = (v >> 8) & 0xff; \ - (p)[2] = (v >> 16) & 0xff; (p)[3] = (v >> 24) & 0xff; } -#define U8TO32_LITTLE(p) \ - (((u32)((p)[0]) ) | ((u32)((p)[1]) << 8) | \ - ((u32)((p)[2]) << 16) | ((u32)((p)[3]) << 24) ) struct salsa20_ctx { @@ -101,7 +96,7 @@ static void salsa20_wordtobyte(u8 output[64], const u32 input[16]) for (i = 0; i < 16; ++i) x[i] = PLUS(x[i],input[i]); for (i = 0; i < 16; ++i) - U32TO8_LITTLE(output + 4 * i,x[i]); + store_le32_noalign((__le32 *)(output + 4 * i), x[i]); } static const char sigma[16] = "expand 32-byte k"; @@ -111,30 +106,30 @@ static void salsa20_keysetup(struct salsa20_ctx *ctx, const u8 *k, u32 kbytes) { const char *constants; - ctx->input[1] = U8TO32_LITTLE(k + 0); - ctx->input[2] = U8TO32_LITTLE(k + 4); - ctx->input[3] = U8TO32_LITTLE(k + 8); - ctx->input[4] = U8TO32_LITTLE(k + 12); + ctx->input[1] = load_le32_noalign((__le32 *)(k + 0)); + ctx->input[2] = load_le32_noalign((__le32 *)(k + 4)); + ctx->input[3] = load_le32_noalign((__le32 *)(k + 8)); + ctx->input[4] = load_le32_noalign((__le32 *)(k + 12)); if (kbytes == 32) { /* recommended */ k += 16; constants = sigma; } else { /* kbytes == 16 */ constants = tau; } - ctx->input[11] = U8TO32_LITTLE(k + 0); - ctx->input[12] = U8TO32_LITTLE(k + 4); - ctx->input[13] = U8TO32_LITTLE(k + 8); - ctx->input[14] = U8TO32_LITTLE(k + 12); - ctx->input[0] = U8TO32_LITTLE(constants + 0); - ctx->input[5] = U8TO32_LITTLE(constants + 4); - ctx->input[10] = U8TO32_LITTLE(constants + 8); - ctx->input[15] = U8TO32_LITTLE(constants + 12); + ctx->input[11] = load_le32_noalign((__le32 *)(k + 0)); + ctx->input[12] = load_le32_noalign((__le32 *)(k + 4)); + ctx->input[13] = load_le32_noalign((__le32 *)(k + 8)); + ctx->input[14] = load_le32_noalign((__le32 *)(k + 12)); + ctx->input[0] = load_le32_noalign((__le32 *)(constants + 0)); + ctx->input[5] = load_le32_noalign((__le32 *)(constants + 4)); + ctx->input[10] = load_le32_noalign((__le32 *)(constants + 8)); + ctx->input[15] = load_le32_noalign((__le32 *)(constants + 12)); } static void salsa20_ivsetup(struct salsa20_ctx *ctx, const u8 *iv) { - ctx->input[6] = U8TO32_LITTLE(iv + 0); - ctx->input[7] = U8TO32_LITTLE(iv + 4); + ctx->input[6] = load_le32_noalign((__le32 *)(iv + 0)); + ctx->input[7] = load_le32_noalign((__le32 *)(iv + 4)); ctx->input[8] = 0; ctx->input[9] = 0; } -- 1.6.1.rc1.262.gb6810
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