diff options
Diffstat (limited to 'crypto/salsa20_generic.c')
| -rw-r--r-- | crypto/salsa20_generic.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/crypto/salsa20_generic.c b/crypto/salsa20_generic.c index 5074006a56c3..8c77bc78a09f 100644 --- a/crypto/salsa20_generic.c +++ b/crypto/salsa20_generic.c @@ -21,9 +21,17 @@ #include <asm/unaligned.h> #include <crypto/internal/skcipher.h> -#include <crypto/salsa20.h> #include <linux/module.h> +#define SALSA20_IV_SIZE 8 +#define SALSA20_MIN_KEY_SIZE 16 +#define SALSA20_MAX_KEY_SIZE 32 +#define SALSA20_BLOCK_SIZE 64 + +struct salsa20_ctx { + u32 initial_state[16]; +}; + static void salsa20_block(u32 *state, __le32 *stream) { u32 x[16]; @@ -93,16 +101,15 @@ static void salsa20_docrypt(u32 *state, u8 *dst, const u8 *src, } } -void crypto_salsa20_init(u32 *state, const struct salsa20_ctx *ctx, +static void salsa20_init(u32 *state, const struct salsa20_ctx *ctx, const u8 *iv) { memcpy(state, ctx->initial_state, sizeof(ctx->initial_state)); state[6] = get_unaligned_le32(iv + 0); state[7] = get_unaligned_le32(iv + 4); } -EXPORT_SYMBOL_GPL(crypto_salsa20_init); -int crypto_salsa20_setkey(struct crypto_skcipher *tfm, const u8 *key, +static int salsa20_setkey(struct crypto_skcipher *tfm, const u8 *key, unsigned int keysize) { static const char sigma[16] = "expand 32-byte k"; @@ -143,7 +150,6 @@ int crypto_salsa20_setkey(struct crypto_skcipher *tfm, const u8 *key, return 0; } -EXPORT_SYMBOL_GPL(crypto_salsa20_setkey); static int salsa20_crypt(struct skcipher_request *req) { @@ -155,7 +161,7 @@ static int salsa20_crypt(struct skcipher_request *req) err = skcipher_walk_virt(&walk, req, true); - crypto_salsa20_init(state, ctx, walk.iv); + salsa20_init(state, ctx, walk.iv); while (walk.nbytes > 0) { unsigned int nbytes = walk.nbytes; @@ -183,7 +189,7 @@ static struct skcipher_alg alg = { .max_keysize = SALSA20_MAX_KEY_SIZE, .ivsize = SALSA20_IV_SIZE, .chunksize = SALSA20_BLOCK_SIZE, - .setkey = crypto_salsa20_setkey, + .setkey = salsa20_setkey, .encrypt = salsa20_crypt, .decrypt = salsa20_crypt, }; |