crypto: chacha - unexport chacha_generic routines

Now that all users of generic ChaCha code have moved to the core library,
there is no longer a need for the generic ChaCha skcpiher driver to
export parts of it implementation for reuse by other drivers. So drop
the exports, and make the symbols static.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/chacha_generic.c

@@ -21,7 +21,7 @@ static int chacha_stream_xor(struct skcipher_request *req,
 
 	err = skcipher_walk_virt(&walk, req, false);
 
-	crypto_chacha_init(state, ctx, iv);
+	chacha_init_generic(state, ctx->key, iv);
 
 	while (walk.nbytes > 0) {
 		unsigned int nbytes = walk.nbytes;
@@ -37,36 +37,27 @@ static int chacha_stream_xor(struct skcipher_request *req,
 	return err;
 }
 
-void crypto_chacha_init(u32 *state, const struct chacha_ctx *ctx, const u8 *iv)
-{
-	chacha_init_generic(state, ctx->key, iv);
-}
-EXPORT_SYMBOL_GPL(crypto_chacha_init);
-
-int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
-			   unsigned int keysize)
+static int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
+				  unsigned int keysize)
 {
 	return chacha_setkey(tfm, key, keysize, 20);
 }
-EXPORT_SYMBOL_GPL(crypto_chacha20_setkey);
 
-int crypto_chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key,
-			   unsigned int keysize)
+static int crypto_chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key,
+				 unsigned int keysize)
 {
 	return chacha_setkey(tfm, key, keysize, 12);
 }
-EXPORT_SYMBOL_GPL(crypto_chacha12_setkey);
 
-int crypto_chacha_crypt(struct skcipher_request *req)
+static int crypto_chacha_crypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
 
 	return chacha_stream_xor(req, ctx, req->iv);
 }
-EXPORT_SYMBOL_GPL(crypto_chacha_crypt);
 
-int crypto_xchacha_crypt(struct skcipher_request *req)
+static int crypto_xchacha_crypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 	struct chacha_ctx *ctx = crypto_skcipher_ctx(tfm);
@@ -75,7 +66,7 @@ int crypto_xchacha_crypt(struct skcipher_request *req)
 	u8 real_iv[16];
 
 	/* Compute the subkey given the original key and first 128 nonce bits */
-	crypto_chacha_init(state, ctx, req->iv);
+	chacha_init_generic(state, ctx->key, req->iv);
 	hchacha_block_generic(state, subctx.key, ctx->nrounds);
 	subctx.nrounds = ctx->nrounds;
 
@@ -86,7 +77,6 @@ int crypto_xchacha_crypt(struct skcipher_request *req)
 	/* Generate the stream and XOR it with the data */
 	return chacha_stream_xor(req, &subctx, real_iv);
 }
-EXPORT_SYMBOL_GPL(crypto_xchacha_crypt);
 
 static struct skcipher_alg algs[] = {
 	{

include/crypto/internal/chacha.h

@@ -12,8 +12,6 @@ struct chacha_ctx {
 	int nrounds;
 };
 
-void crypto_chacha_init(u32 *state, const struct chacha_ctx *ctx, const u8 *iv);
-
 static inline int chacha_setkey(struct crypto_skcipher *tfm, const u8 *key,
 				unsigned int keysize, int nrounds)
 {
@@ -42,12 +40,4 @@ static int inline chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key,
 	return chacha_setkey(tfm, key, keysize, 12);
 }
 
-int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
-			   unsigned int keysize);
-int crypto_chacha12_setkey(struct crypto_skcipher *tfm, const u8 *key,
-			   unsigned int keysize);
-
-int crypto_chacha_crypt(struct skcipher_request *req);
-int crypto_xchacha_crypt(struct skcipher_request *req);
-
 #endif /* _CRYPTO_CHACHA_H */