diff options
| -rw-r--r-- | crypto/serpent.c | 41 | ||||
| -rw-r--r-- | include/crypto/serpent.h | 25 |
2 files changed, 47 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", diff --git a/include/crypto/serpent.h b/include/crypto/serpent.h new file mode 100644 index 000000000000..40df885f9d1f --- /dev/null +++ b/include/crypto/serpent.h @@ -0,0 +1,25 @@ +/* + * Common values for serpent algorithms + */ + +#ifndef _CRYPTO_SERPENT_H +#define _CRYPTO_SERPENT_H + +#include <linux/types.h> +#include <linux/crypto.h> + +#define SERPENT_MIN_KEY_SIZE 0 +#define SERPENT_MAX_KEY_SIZE 32 +#define SERPENT_EXPKEY_WORDS 132 +#define SERPENT_BLOCK_SIZE 16 + +struct serpent_ctx { + u32 expkey[SERPENT_EXPKEY_WORDS]; +}; + +int serpent_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen); + +void __serpent_encrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src); +void __serpent_decrypt(struct serpent_ctx *ctx, u8 *dst, const u8 *src); + +#endif |