crypto: salsa20 - Revert "crypto: salsa20 - export generic helpers"
This reverts commit eb772f37ae8163a89e28a435f6a18742ae06653b, as now the
x86 Salsa20 implementation has been removed and the generic helpers are
no longer needed outside of salsa20_generic.c.
We could keep this just in case someone else wants to add a new
optimized Salsa20 implementation. But given that we have ChaCha20 now
too, I think it's unlikely. And this can always be reverted back.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/salsa20_generic.c b/crypto/salsa20_generic.c
index 5074006..8c77bc7 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 @@
}
}
-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 @@
return 0;
}
-EXPORT_SYMBOL_GPL(crypto_salsa20_setkey);
static int salsa20_crypt(struct skcipher_request *req)
{
@@ -155,7 +161,7 @@
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 @@
.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,
};