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| author | Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | 2011-10-18 00:03:08 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2011-11-09 11:43:00 +0800 |
| commit | bc83b8299cb4ac2a9f64215a04854e4c934d1510 (patch) | |
| tree | 706503a1a84e12d0c5de95600ff65fa11cc799e8 /crypto/serpent.c | |
| parent | 7fb7fe4469d0b870a031a5d33676343979b80625 (diff) | |
| download | lwn-bc83b8299cb4ac2a9f64215a04854e4c934d1510.tar.gz lwn-bc83b8299cb4ac2a9f64215a04854e4c934d1510.zip | |
crypto: serpent - export common functions for x86_64/i386-sse2 assembler implementations
Serpent SSE2 assembler implementations only provide 4-way/8-way parallel
functions and need setkey and one-block encrypt/decrypt functions.
CC: Dag Arne Osvik <osvik@ii.uib.no>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/serpent.c')
| -rw-r--r-- | crypto/serpent.c | 41 |
1 files changed, 22 insertions, 19 deletions
diff --git a/crypto/serpent.c b/crypto/serpent.c index b651a55fa569..867ca93ebb63 100644 --- a/crypto/serpent.c +++ b/crypto/serpent.c @@ -21,16 +21,12 @@ #include <asm/byteorder.h> #include <linux/crypto.h> #include <linux/types.h> +#include <crypto/serpent.h> /* Key is padded to the maximum of 256 bits before round key generation. * Any key length <= 256 bits (32 bytes) is allowed by the algorithm. */ -#define SERPENT_MIN_KEY_SIZE 0 -#define SERPENT_MAX_KEY_SIZE 32 -#define SERPENT_EXPKEY_WORDS 132 -#define SERPENT_BLOCK_SIZE 16 - #define PHI 0x9e3779b9UL #define keyiter(a,b,c,d,i,j) \ @@ -210,13 +206,7 @@ x1 ^= x4; x3 ^= x4; x4 &= x0; \ x4 ^= x2; -struct serpent_ctx { - u32 expkey[SERPENT_EXPKEY_WORDS]; -}; - - -static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, - unsigned int keylen) +int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) { struct serpent_ctx *ctx = crypto_tfm_ctx(tfm); u32 *k = ctx->expkey; @@ -359,12 +349,11 @@ static int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, return 0; } +EXPORT_SYMBOL_GPL(serpent_setkey); -static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) +void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src) { - struct serpent_ctx *ctx = crypto_tfm_ctx(tfm); - const u32 - *k = ctx->expkey; + const u32 *k = ctx->expkey; const __le32 *s = (const __le32 *)src; __le32 *d = (__le32 *)dst; u32 r0, r1, r2, r3, r4; @@ -418,12 +407,18 @@ static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) d[2] = cpu_to_le32(r2); d[3] = cpu_to_le32(r3); } +EXPORT_SYMBOL_GPL(__serpent_encrypt); -static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) +static void serpent_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { struct serpent_ctx *ctx = crypto_tfm_ctx(tfm); - const u32 - *k = ((struct serpent_ctx *)ctx)->expkey; + + __serpent_encrypt(ctx, dst, src); +} + +void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src) +{ + const u32 *k = ctx->expkey; const __le32 *s = (const __le32 *)src; __le32 *d = (__le32 *)dst; u32 r0, r1, r2, r3, r4; @@ -472,6 +467,14 @@ static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) d[2] = cpu_to_le32(r1); d[3] = cpu_to_le32(r4); } +EXPORT_SYMBOL_GPL(__serpent_decrypt); + +static void serpent_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) +{ + struct serpent_ctx *ctx = crypto_tfm_ctx(tfm); + + __serpent_decrypt(ctx, dst, src); +} static struct crypto_alg serpent_alg = { .cra_name = "serpent", |