Move c_src dirs back to toplevel

[bcachefs-tools-debian] / include / crypto / skcipher.h

diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h
new file mode 100644 (file)
index 0000000..5989855
--- /dev/null
+++ b/include/crypto/skcipher.h
@@ -0,0 +1,126 @@
+/*
+ * Symmetric key ciphers.
+ * 
+ * Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * 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.
+ *
+ */
+
+#ifndef _CRYPTO_SKCIPHER_H
+#define _CRYPTO_SKCIPHER_H
+
+#include <linux/crypto.h>
+
+struct crypto_skcipher;
+struct skcipher_request;
+
+struct skcipher_alg {
+       struct crypto_alg base;
+};
+
+int crypto_register_skcipher(struct skcipher_alg *alg);
+
+struct crypto_skcipher {
+       int (*setkey)(struct crypto_skcipher *tfm, const u8 *key,
+                     unsigned int keylen);
+       int (*encrypt)(struct skcipher_request *req);
+       int (*decrypt)(struct skcipher_request *req);
+
+       unsigned                ivsize;
+       unsigned                keysize;
+
+       struct crypto_tfm       base;
+};
+
+struct crypto_sync_skcipher {
+       struct crypto_skcipher base;
+};
+
+struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
+                                             u32 type, u32 mask);
+
+static inline struct crypto_sync_skcipher *
+crypto_alloc_sync_skcipher(const char *alg_name, u32 type, u32 mask)
+{
+       return (void *) crypto_alloc_skcipher(alg_name, type, mask);
+}
+
+static inline void crypto_free_skcipher(struct crypto_skcipher *tfm)
+{
+       kfree(tfm);
+}
+
+static inline void crypto_free_sync_skcipher(struct crypto_sync_skcipher *tfm)
+{
+       crypto_free_skcipher(&tfm->base);
+}
+
+struct skcipher_request {
+       unsigned                cryptlen;
+       u8                      *iv;
+
+       struct scatterlist      *src;
+       struct scatterlist      *dst;
+
+       struct crypto_tfm       *tfm;
+};
+
+#define MAX_SYNC_SKCIPHER_REQSIZE      384
+#define SYNC_SKCIPHER_REQUEST_ON_STACK(name, tfm) \
+       char __##name##_desc[sizeof(struct skcipher_request) + \
+                            MAX_SYNC_SKCIPHER_REQSIZE + \
+                            (!(sizeof((struct crypto_sync_skcipher *)1 == \
+                                      (typeof(tfm))1))) \
+                           ] CRYPTO_MINALIGN_ATTR; \
+       struct skcipher_request *name = (void *)__##name##_desc
+
+static inline int crypto_skcipher_setkey(struct crypto_skcipher *tfm,
+                                        const u8 *key, unsigned int keylen)
+{
+       return tfm->setkey(tfm, key, keylen);
+}
+
+static inline struct crypto_skcipher *crypto_skcipher_reqtfm(
+       struct skcipher_request *req)
+{
+       return container_of(req->tfm, struct crypto_skcipher, base);
+}
+
+static inline int crypto_skcipher_encrypt(struct skcipher_request *req)
+{
+       return crypto_skcipher_reqtfm(req)->encrypt(req);
+}
+
+static inline int crypto_skcipher_decrypt(struct skcipher_request *req)
+{
+       return crypto_skcipher_reqtfm(req)->decrypt(req);
+}
+
+static inline void skcipher_request_set_tfm(struct skcipher_request *req,
+                                           struct crypto_skcipher *tfm)
+{
+       req->tfm = &tfm->base;
+}
+
+static inline void skcipher_request_set_sync_tfm(struct skcipher_request *req,
+                                           struct crypto_sync_skcipher *tfm)
+{
+       skcipher_request_set_tfm(req, &tfm->base);
+}
+
+static inline void skcipher_request_set_crypt(
+       struct skcipher_request *req,
+       struct scatterlist *src, struct scatterlist *dst,
+       unsigned int cryptlen, void *iv)
+{
+       req->src        = src;
+       req->dst        = dst;
+       req->cryptlen   = cryptlen;
+       req->iv         = iv;
+}
+
+#endif /* _CRYPTO_SKCIPHER_H */