This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / crypto / algapi.h

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
new file mode 100644 (file)
index 0000000..5748aec
--- /dev/null
+++ b/include/crypto/algapi.h
@@ -0,0 +1,156 @@
+/*
+ * 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>
+
+struct module;
+struct seq_file;
+
+struct crypto_type {
+       unsigned int (*ctxsize)(struct crypto_alg *alg);
+       int (*init)(struct crypto_tfm *tfm);
+       void (*exit)(struct crypto_tfm *tfm);
+       void (*show)(struct seq_file *m, struct crypto_alg *alg);
+};
+
+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)(void *param, unsigned int len);
+       void (*free)(struct crypto_instance *inst);
+
+       char name[CRYPTO_MAX_ALG_NAME];
+};
+
+struct crypto_spawn {
+       struct list_head list;
+       struct crypto_alg *alg;
+       struct crypto_instance *inst;
+};
+
+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;
+};
+
+extern const struct crypto_type crypto_blkcipher_type;
+extern const struct crypto_type crypto_hash_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_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
+                     struct crypto_instance *inst);
+void crypto_drop_spawn(struct crypto_spawn *spawn);
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn);
+
+struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,
+                                      u32 type, u32 mask);
+struct crypto_instance *crypto_alloc_instance(const char *name,
+                                             struct crypto_alg *alg);
+
+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);
+
+static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
+{
+       unsigned long addr = (unsigned long)crypto_tfm_ctx(tfm);
+       unsigned long align = crypto_tfm_alg_alignmask(tfm);
+
+       if (align <= crypto_tfm_ctx_alignment())
+               align = 1;
+       return (void *)ALIGN(addr, align);
+}
+
+static inline void *crypto_instance_ctx(struct crypto_instance *inst)
+{
+       return inst->__ctx;
+}
+
+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 cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
+{
+       return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
+}
+
+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;
+}
+
+#endif /* _CRYPTO_ALGAPI_H */
+