1 files changed, 110 insertions, 0 deletions

diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h
new file mode 100644
index 000000000000..25fd6126522d
--- /dev/null
+++ b/include/crypto/skcipher.h
@@ -0,0 +1,110 @@
+/*
+ * Symmetric key ciphers.
+ * 
+ * Copyright (c) 2007 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>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+/**
+ *      struct skcipher_givcrypt_request - Crypto request with IV generation
+ *      @seq: Sequence number for IV generation
+ *      @giv: Space for generated IV
+ *      @creq: The crypto request itself
+ */
+struct skcipher_givcrypt_request {
+        u64 seq;
+        u8 *giv;
+
+        struct ablkcipher_request creq;
+};
+
+static inline struct crypto_ablkcipher *skcipher_givcrypt_reqtfm(
+        struct skcipher_givcrypt_request *req)
+{
+        return crypto_ablkcipher_reqtfm(&req->creq);
+}
+
+static inline int crypto_skcipher_givencrypt(
+        struct skcipher_givcrypt_request *req)
+{
+        struct ablkcipher_tfm *crt =
+                crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));
+        return crt->givencrypt(req);
+};
+
+static inline int crypto_skcipher_givdecrypt(
+        struct skcipher_givcrypt_request *req)
+{
+        struct ablkcipher_tfm *crt =
+                crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));
+        return crt->givdecrypt(req);
+};
+
+static inline void skcipher_givcrypt_set_tfm(
+        struct skcipher_givcrypt_request *req, struct crypto_ablkcipher *tfm)
+{
+        req->creq.base.tfm = crypto_ablkcipher_tfm(tfm);
+}
+
+static inline struct skcipher_givcrypt_request *skcipher_givcrypt_cast(
+        struct crypto_async_request *req)
+{
+        return container_of(ablkcipher_request_cast(req),
+                            struct skcipher_givcrypt_request, creq);
+}
+
+static inline struct skcipher_givcrypt_request *skcipher_givcrypt_alloc(
+        struct crypto_ablkcipher *tfm, gfp_t gfp)
+{
+        struct skcipher_givcrypt_request *req;
+
+        req = kmalloc(sizeof(struct skcipher_givcrypt_request) +
+                      crypto_ablkcipher_reqsize(tfm), gfp);
+
+        if (likely(req))
+                skcipher_givcrypt_set_tfm(req, tfm);
+
+        return req;
+}
+
+static inline void skcipher_givcrypt_free(struct skcipher_givcrypt_request *req)
+{
+        kfree(req);
+}
+
+static inline void skcipher_givcrypt_set_callback(
+        struct skcipher_givcrypt_request *req, u32 flags,
+        crypto_completion_t complete, void *data)
+{
+        ablkcipher_request_set_callback(&req->creq, flags, complete, data);
+}
+
+static inline void skcipher_givcrypt_set_crypt(
+        struct skcipher_givcrypt_request *req,
+        struct scatterlist *src, struct scatterlist *dst,
+        unsigned int nbytes, void *iv)
+{
+        ablkcipher_request_set_crypt(&req->creq, src, dst, nbytes, iv);
+}
+
+static inline void skcipher_givcrypt_set_giv(
+        struct skcipher_givcrypt_request *req, u8 *giv, u64 seq)
+{
+        req->giv = giv;
+        req->seq = seq;
+}
+
+#endif  /* _CRYPTO_SKCIPHER_H */
+