2 files changed, 132 insertions, 0 deletions

diff --git a/include/crypto/if_alg.h b/include/crypto/if_alg.h
new file mode 100644
index 000000000000..c5813c87de06
--- /dev/null
+++ b/include/crypto/if_alg.h
@@ -0,0 +1,92 @@
+/*
+ * if_alg: User-space algorithm interface
+ *
+ * Copyright (c) 2010 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_IF_ALG_H
+#define _CRYPTO_IF_ALG_H
+
+#include <linux/compiler.h>
+#include <linux/completion.h>
+#include <linux/if_alg.h>
+#include <linux/types.h>
+#include <net/sock.h>
+
+#define ALG_MAX_PAGES                   16
+
+struct crypto_async_request;
+
+struct alg_sock {
+        /* struct sock must be the first member of struct alg_sock */
+        struct sock sk;
+
+        struct sock *parent;
+
+        const struct af_alg_type *type;
+        void *private;
+};
+
+struct af_alg_completion {
+        struct completion completion;
+        int err;
+};
+
+struct af_alg_control {
+        struct af_alg_iv *iv;
+        int op;
+};
+
+struct af_alg_type {
+        void *(*bind)(const char *name, u32 type, u32 mask);
+        void (*release)(void *private);
+        int (*setkey)(void *private, const u8 *key, unsigned int keylen);
+        int (*accept)(void *private, struct sock *sk);
+
+        struct proto_ops *ops;
+        struct module *owner;
+        char name[14];
+};
+
+struct af_alg_sgl {
+        struct scatterlist sg[ALG_MAX_PAGES];
+        struct page *pages[ALG_MAX_PAGES];
+};
+
+int af_alg_register_type(const struct af_alg_type *type);
+int af_alg_unregister_type(const struct af_alg_type *type);
+
+int af_alg_release(struct socket *sock);
+int af_alg_accept(struct sock *sk, struct socket *newsock);
+
+int af_alg_make_sg(struct af_alg_sgl *sgl, void __user *addr, int len,
+                   int write);
+void af_alg_free_sg(struct af_alg_sgl *sgl);
+
+int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
+
+int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
+void af_alg_complete(struct crypto_async_request *req, int err);
+
+static inline struct alg_sock *alg_sk(struct sock *sk)
+{
+        return (struct alg_sock *)sk;
+}
+
+static inline void af_alg_release_parent(struct sock *sk)
+{
+        sock_put(alg_sk(sk)->parent);
+}
+
+static inline void af_alg_init_completion(struct af_alg_completion *completion)
+{
+        init_completion(&completion->completion);
+}
+
+#endif  /* _CRYPTO_IF_ALG_H */
diff --git a/include/linux/if_alg.h b/include/linux/if_alg.h
new file mode 100644
index 000000000000..0f9acce5b1ff
--- /dev/null
+++ b/include/linux/if_alg.h
@@ -0,0 +1,40 @@
+/*
+ * if_alg: User-space algorithm interface
+ *
+ * Copyright (c) 2010 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 _LINUX_IF_ALG_H
+#define _LINUX_IF_ALG_H
+
+#include <linux/types.h>
+
+struct sockaddr_alg {
+        __u16   salg_family;
+        __u8    salg_type[14];
+        __u32   salg_feat;
+        __u32   salg_mask;
+        __u8    salg_name[64];
+};
+
+struct af_alg_iv {
+        __u32   ivlen;
+        __u8    iv[0];
+};
+
+/* Socket options */
+#define ALG_SET_KEY                     1
+#define ALG_SET_IV                      2
+#define ALG_SET_OP                      3
+
+/* Operations */
+#define ALG_OP_DECRYPT                  0
+#define ALG_OP_ENCRYPT                  1
+
+#endif  /* _LINUX_IF_ALG_H */