Move c_src dirs back to toplevel

[bcachefs-tools-debian] / c_src / linux / crypto / chacha20_generic.c

diff --git a/c_src/linux/crypto/chacha20_generic.c b/c_src/linux/crypto/chacha20_generic.c
deleted file mode 100644 (file)
index 914189e..0000000
--- a/c_src/linux/crypto/chacha20_generic.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * ChaCha20 256-bit cipher algorithm, RFC7539
- *
- * Copyright (C) 2015 Martin Willi
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/byteorder.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/scatterlist.h>
-#include <asm/unaligned.h>
-
-#include <linux/crypto.h>
-#include <crypto/algapi.h>
-#include <crypto/chacha.h>
-#include <crypto/skcipher.h>
-
-#include <sodium/crypto_stream_chacha20.h>
-
-static struct skcipher_alg alg;
-
-struct chacha20_tfm {
-       struct crypto_skcipher  tfm;
-       u32                     key[8];
-};
-
-static int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
-                                 unsigned int keysize)
-{
-       struct chacha20_tfm *ctx =
-               container_of(tfm, struct chacha20_tfm, tfm);
-       int i;
-
-       if (keysize != CHACHA_KEY_SIZE)
-               return -EINVAL;
-
-       for (i = 0; i < ARRAY_SIZE(ctx->key); i++)
-               ctx->key[i] = get_unaligned_le32(key + i * sizeof(u32));
-
-       return 0;
-}
-
-static int crypto_chacha20_crypt(struct skcipher_request *req)
-{
-       struct chacha20_tfm *ctx =
-               container_of(req->tfm, struct chacha20_tfm, tfm.base);
-       struct scatterlist *sg = req->src;
-       unsigned nbytes = req->cryptlen;
-       u32 iv[4];
-       int ret;
-
-       BUG_ON(req->src != req->dst);
-
-       memcpy(iv, req->iv, sizeof(iv));
-
-       while (1) {
-               ret = crypto_stream_chacha20_xor_ic(sg_virt(sg),
-                                                   sg_virt(sg),
-                                                   sg->length,
-                                                   (void *) &iv[2],
-                                                   iv[0] | ((u64) iv[1] << 32),
-                                                   (void *) ctx->key);
-               BUG_ON(ret);
-
-               nbytes -= sg->length;
-
-               if (sg_is_last(sg))
-                       break;
-
-               BUG_ON(sg->length % CHACHA_BLOCK_SIZE);
-               iv[0] += sg->length / CHACHA_BLOCK_SIZE;
-               sg = sg_next(sg);
-       };
-
-       BUG_ON(nbytes);
-
-       return 0;
-}
-
-static void *crypto_chacha20_alloc_tfm(void)
-{
-       struct chacha20_tfm *tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
-
-       if (!tfm)
-               return NULL;
-
-       tfm->tfm.base.alg       = &alg.base;
-       tfm->tfm.setkey         = crypto_chacha20_setkey;
-       tfm->tfm.encrypt        = crypto_chacha20_crypt;
-       tfm->tfm.decrypt        = crypto_chacha20_crypt;
-       tfm->tfm.ivsize         = CHACHA_IV_SIZE;
-       tfm->tfm.keysize        = CHACHA_KEY_SIZE;
-
-       return tfm;
-}
-
-static struct skcipher_alg alg = {
-       .base.cra_name          = "chacha20",
-       .base.alloc_tfm         = crypto_chacha20_alloc_tfm,
-};
-
-__attribute__((constructor(110)))
-static int chacha20_generic_mod_init(void)
-{
-       return crypto_register_skcipher(&alg);
-}