1 files changed, 387 insertions, 0 deletions
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
new file mode 100644
index 00000000..59c3e5bd
--- /dev/null
+++ b/include/crypto/algapi.h
@@ -0,0 +1,387 @@
+/*
+ * Cryptographic API for algorithms (i.e., low-level API).
+ *
+ * Copyright (c) 2006 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_ALGAPI_H
+#define _CRYPTO_ALGAPI_H
+
+#include <linux/crypto.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+
+struct module;
+struct rtattr;
+struct seq_file;
+
+struct crypto_type {
+	unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
+	unsigned int (*extsize)(struct crypto_alg *alg);
+	int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
+	int (*init_tfm)(struct crypto_tfm *tfm);
+	void (*show)(struct seq_file *m, struct crypto_alg *alg);
+	struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
+
+	unsigned int type;
+	unsigned int maskclear;
+	unsigned int maskset;
+	unsigned int tfmsize;
+};
+
+struct crypto_instance {
+	struct crypto_alg alg;
+
+	struct crypto_template *tmpl;
+	struct hlist_node list;
+
+	void *__ctx[] CRYPTO_MINALIGN_ATTR;
+};
+
+struct crypto_template {
+	struct list_head list;
+	struct hlist_head instances;
+	struct module *module;
+
+	struct crypto_instance *(*alloc)(struct rtattr **tb);
+	void (*free)(struct crypto_instance *inst);
+	int (*create)(struct crypto_template *tmpl, struct rtattr **tb);
+
+	char name[CRYPTO_MAX_ALG_NAME];
+};
+
+struct crypto_spawn {
+	struct list_head list;
+	struct crypto_alg *alg;
+	struct crypto_instance *inst;
+	const struct crypto_type *frontend;
+	u32 mask;
+};
+
+struct crypto_queue {
+	struct list_head list;
+	struct list_head *backlog;
+
+	unsigned int qlen;
+	unsigned int max_qlen;
+};
+
+struct scatter_walk {
+	struct scatterlist *sg;
+	unsigned int offset;
+};
+
+struct blkcipher_walk {
+	union {
+		struct {
+			struct page *page;
+			unsigned long offset;
+		} phys;
+
+		struct {
+			u8 *page;
+			u8 *addr;
+		} virt;
+	} src, dst;
+
+	struct scatter_walk in;
+	unsigned int nbytes;
+
+	struct scatter_walk out;
+	unsigned int total;
+
+	void *page;
+	u8 *buffer;
+	u8 *iv;
+
+	int flags;
+	unsigned int blocksize;
+};
+
+struct ablkcipher_walk {
+	struct {
+		struct page *page;
+		unsigned int offset;
+	} src, dst;
+
+	struct scatter_walk	in;
+	unsigned int		nbytes;
+	struct scatter_walk	out;
+	unsigned int		total;
+	struct list_head	buffers;
+	u8			*iv_buffer;
+	u8			*iv;
+	int			flags;
+	unsigned int		blocksize;
+};
+
+extern const struct crypto_type crypto_ablkcipher_type;
+extern const struct crypto_type crypto_aead_type;
+extern const struct crypto_type crypto_blkcipher_type;
+
+void crypto_mod_put(struct crypto_alg *alg);
+
+int crypto_register_template(struct crypto_template *tmpl);
+void crypto_unregister_template(struct crypto_template *tmpl);
+struct crypto_template *crypto_lookup_template(const char *name);
+
+int crypto_register_instance(struct crypto_template *tmpl,
+			     struct crypto_instance *inst);
+
+int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
+		      struct crypto_instance *inst, u32 mask);
+int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
+		       struct crypto_instance *inst,
+		       const struct crypto_type *frontend);
+
+void crypto_drop_spawn(struct crypto_spawn *spawn);
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
+				    u32 mask);
+void *crypto_spawn_tfm2(struct crypto_spawn *spawn);
+
+static inline void crypto_set_spawn(struct crypto_spawn *spawn,
+				    struct crypto_instance *inst)
+{
+	spawn->inst = inst;
+}
+
+struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
+int crypto_check_attr_type(struct rtattr **tb, u32 type);
+const char *crypto_attr_alg_name(struct rtattr *rta);
+struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
+				    const struct crypto_type *frontend,
+				    u32 type, u32 mask);
+
+static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
+						 u32 type, u32 mask)
+{
+	return crypto_attr_alg2(rta, NULL, type, mask);
+}
+
+int crypto_attr_u32(struct rtattr *rta, u32 *num);
+void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
+			     unsigned int head);
+struct crypto_instance *crypto_alloc_instance(const char *name,
+					      struct crypto_alg *alg);
+
+void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
+int crypto_enqueue_request(struct crypto_queue *queue,
+			   struct crypto_async_request *request);
+void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset);
+struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
+int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
+
+/* These functions require the input/output to be aligned as u32. */
+void crypto_inc(u8 *a, unsigned int size);
+void crypto_xor(u8 *dst, const u8 *src, unsigned int size);
+
+int blkcipher_walk_done(struct blkcipher_desc *desc,
+			struct blkcipher_walk *walk, int err);
+int blkcipher_walk_virt(struct blkcipher_desc *desc,
+			struct blkcipher_walk *walk);
+int blkcipher_walk_phys(struct blkcipher_desc *desc,
+			struct blkcipher_walk *walk);
+int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
+			      struct blkcipher_walk *walk,
+			      unsigned int blocksize);
+
+int ablkcipher_walk_done(struct ablkcipher_request *req,
+			 struct ablkcipher_walk *walk, int err);
+int ablkcipher_walk_phys(struct ablkcipher_request *req,
+			 struct ablkcipher_walk *walk);
+void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
+
+static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
+{
+	return PTR_ALIGN(crypto_tfm_ctx(tfm),
+			 crypto_tfm_alg_alignmask(tfm) + 1);
+}
+
+static inline struct crypto_instance *crypto_tfm_alg_instance(
+	struct crypto_tfm *tfm)
+{
+	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
+}
+
+static inline void *crypto_instance_ctx(struct crypto_instance *inst)
+{
+	return inst->__ctx;
+}
+
+static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
+	struct crypto_ablkcipher *tfm)
+{
+	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
+}
+
+static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
+{
+	return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
+{
+	return crypto_tfm_ctx_aligned(&tfm->base);
+}
+
+static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
+{
+	return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
+}
+
+static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
+{
+	return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline struct crypto_instance *crypto_aead_alg_instance(
+	struct crypto_aead *aead)
+{
+	return crypto_tfm_alg_instance(&aead->base);
+}
+
+static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
+	struct crypto_spawn *spawn)
+{
+	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
+	u32 mask = CRYPTO_ALG_TYPE_MASK;
+
+	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
+}
+
+static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
+{
+	return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
+{
+	return crypto_tfm_ctx_aligned(&tfm->base);
+}
+
+static inline struct crypto_cipher *crypto_spawn_cipher(
+	struct crypto_spawn *spawn)
+{
+	u32 type = CRYPTO_ALG_TYPE_CIPHER;
+	u32 mask = CRYPTO_ALG_TYPE_MASK;
+
+	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
+}
+
+static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
+{
+	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
+}
+
+static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn)
+{
+	u32 type = CRYPTO_ALG_TYPE_HASH;
+	u32 mask = CRYPTO_ALG_TYPE_HASH_MASK;
+
+	return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask));
+}
+
+static inline void *crypto_hash_ctx(struct crypto_hash *tfm)
+{
+	return crypto_tfm_ctx(&tfm->base);
+}
+
+static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm)
+{
+	return crypto_tfm_ctx_aligned(&tfm->base);
+}
+
+static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
+				       struct scatterlist *dst,
+				       struct scatterlist *src,
+				       unsigned int nbytes)
+{
+	walk->in.sg = src;
+	walk->out.sg = dst;
+	walk->total = nbytes;
+}
+
+static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
+					struct scatterlist *dst,
+					struct scatterlist *src,
+					unsigned int nbytes)
+{
+	walk->in.sg = src;
+	walk->out.sg = dst;
+	walk->total = nbytes;
+	INIT_LIST_HEAD(&walk->buffers);
+}
+
+static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
+{
+	if (unlikely(!list_empty(&walk->buffers)))
+		__ablkcipher_walk_complete(walk);
+}
+
+static inline struct crypto_async_request *crypto_get_backlog(
+	struct crypto_queue *queue)
+{
+	return queue->backlog == &queue->list ? NULL :
+	       container_of(queue->backlog, struct crypto_async_request, list);
+}
+
+static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
+					     struct ablkcipher_request *request)
+{
+	return crypto_enqueue_request(queue, &request->base);
+}
+
+static inline struct ablkcipher_request *ablkcipher_dequeue_request(
+	struct crypto_queue *queue)
+{
+	return ablkcipher_request_cast(crypto_dequeue_request(queue));
+}
+
+static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
+{
+	return req->__ctx;
+}
+
+static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
+					  struct crypto_ablkcipher *tfm)
+{
+	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
+}
+
+static inline void *aead_request_ctx(struct aead_request *req)
+{
+	return req->__ctx;
+}
+
+static inline void aead_request_complete(struct aead_request *req, int err)
+{
+	req->base.complete(&req->base, err);
+}
+
+static inline u32 aead_request_flags(struct aead_request *req)
+{
+	return req->base.flags;
+}
+
+static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
+						     u32 type, u32 mask)
+{
+	return crypto_attr_alg(tb[1], type, mask);
+}
+
+/*
+ * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
+ * Otherwise returns zero.
+ */
+static inline int crypto_requires_sync(u32 type, u32 mask)
+{
+	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
+}
+
+#endif	/* _CRYPTO_ALGAPI_H */
+