1 files changed, 166 insertions, 69 deletions

diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h
index e42f7063f245..0cad8e7364c8 100644
--- a/include/crypto/internal/skcipher.h
+++ b/include/crypto/internal/skcipher.h
@@ -1,23 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * 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_INTERNAL_SKCIPHER_H
 #define _CRYPTO_INTERNAL_SKCIPHER_H
 
 #include <crypto/algapi.h>
+#include <crypto/internal/cipher.h>
 #include <crypto/skcipher.h>
-#include <linux/list.h>
 #include <linux/types.h>
 
+/*
+ * Set this if your algorithm is sync but needs a reqsize larger
+ * than MAX_SYNC_SKCIPHER_REQSIZE.
+ *
+ * Reuse bit that is specific to hash algorithms.
+ */
+#define CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE CRYPTO_ALG_OPTIONAL_KEY
+
 struct aead_request;
 struct rtattr;
 
@@ -32,31 +35,53 @@ struct skcipher_instance {
 	};
 };
 
+struct lskcipher_instance {
+	void (*free)(struct lskcipher_instance *inst);
+	union {
+		struct {
+			char head[offsetof(struct lskcipher_alg, co.base)];
+			struct crypto_instance base;
+		} s;
+		struct lskcipher_alg alg;
+	};
+};
+
 struct crypto_skcipher_spawn {
 	struct crypto_spawn base;
 };
 
+struct crypto_lskcipher_spawn {
+	struct crypto_spawn base;
+};
+
 struct skcipher_walk {
 	union {
+		/* Virtual address of the source. */
 		struct {
-			struct page *page;
-			unsigned long offset;
-		} phys;
+			struct {
+				const void *const addr;
+			} virt;
+		} src;
+
+		/* Private field for the API, do not use. */
+		struct scatter_walk in;
+	};
 
+	union {
+		/* Virtual address of the destination. */
 		struct {
-			u8 *page;
-			void *addr;
-		} virt;
-	} src, dst;
+			struct {
+				void *const addr;
+			} virt;
+		} dst;
 
-	struct scatter_walk in;
-	unsigned int nbytes;
+		/* Private field for the API, do not use. */
+		struct scatter_walk out;
+	};
 
-	struct scatter_walk out;
+	unsigned int nbytes;
 	unsigned int total;
 
-	struct list_head buffers;
-
 	u8 *page;
 	u8 *buffer;
 	u8 *oiv;
@@ -70,14 +95,18 @@ struct skcipher_walk {
 	unsigned int alignmask;
 };
 
-extern const struct crypto_type crypto_givcipher_type;
-
 static inline struct crypto_instance *skcipher_crypto_instance(
 	struct skcipher_instance *inst)
 {
 	return &inst->s.base;
 }
 
+static inline struct crypto_instance *lskcipher_crypto_instance(
+	struct lskcipher_instance *inst)
+{
+	return &inst->s.base;
+}
+
 static inline struct skcipher_instance *skcipher_alg_instance(
 	struct crypto_skcipher *skcipher)
 {
@@ -85,40 +114,62 @@ static inline struct skcipher_instance *skcipher_alg_instance(
 			    struct skcipher_instance, alg);
 }
 
+static inline struct lskcipher_instance *lskcipher_alg_instance(
+	struct crypto_lskcipher *lskcipher)
+{
+	return container_of(crypto_lskcipher_alg(lskcipher),
+			    struct lskcipher_instance, alg);
+}
+
 static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
 {
 	return crypto_instance_ctx(skcipher_crypto_instance(inst));
 }
 
-static inline void skcipher_request_complete(struct skcipher_request *req, int err)
+static inline void *lskcipher_instance_ctx(struct lskcipher_instance *inst)
 {
-	req->base.complete(&req->base, err);
+	return crypto_instance_ctx(lskcipher_crypto_instance(inst));
 }
 
-static inline void crypto_set_skcipher_spawn(
-	struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
+static inline void skcipher_request_complete(struct skcipher_request *req, int err)
 {
-	crypto_set_spawn(&spawn->base, inst);
+	crypto_request_complete(&req->base, err);
 }
 
-int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
-			 u32 type, u32 mask);
+int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
+			 struct crypto_instance *inst,
+			 const char *name, u32 type, u32 mask);
+
+int crypto_grab_lskcipher(struct crypto_lskcipher_spawn *spawn,
+			  struct crypto_instance *inst,
+			  const char *name, u32 type, u32 mask);
 
 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
 {
 	crypto_drop_spawn(&spawn->base);
 }
 
-static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
-	struct crypto_skcipher_spawn *spawn)
+static inline void crypto_drop_lskcipher(struct crypto_lskcipher_spawn *spawn)
+{
+	crypto_drop_spawn(&spawn->base);
+}
+
+static inline struct lskcipher_alg *crypto_lskcipher_spawn_alg(
+	struct crypto_lskcipher_spawn *spawn)
 {
-	return container_of(spawn->base.alg, struct skcipher_alg, base);
+	return container_of(spawn->base.alg, struct lskcipher_alg, co.base);
 }
 
-static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
+static inline struct skcipher_alg_common *crypto_spawn_skcipher_alg_common(
 	struct crypto_skcipher_spawn *spawn)
 {
-	return crypto_skcipher_spawn_alg(spawn);
+	return container_of(spawn->base.alg, struct skcipher_alg_common, base);
+}
+
+static inline struct lskcipher_alg *crypto_spawn_lskcipher_alg(
+	struct crypto_lskcipher_spawn *spawn)
+{
+	return crypto_lskcipher_spawn_alg(spawn);
 }
 
 static inline struct crypto_skcipher *crypto_spawn_skcipher(
@@ -127,12 +178,25 @@ static inline struct crypto_skcipher *crypto_spawn_skcipher(
 	return crypto_spawn_tfm2(&spawn->base);
 }
 
+static inline struct crypto_lskcipher *crypto_spawn_lskcipher(
+	struct crypto_lskcipher_spawn *spawn)
+{
+	return crypto_spawn_tfm2(&spawn->base);
+}
+
 static inline void crypto_skcipher_set_reqsize(
 	struct crypto_skcipher *skcipher, unsigned int reqsize)
 {
 	skcipher->reqsize = reqsize;
 }
 
+static inline void crypto_skcipher_set_reqsize_dma(
+	struct crypto_skcipher *skcipher, unsigned int reqsize)
+{
+	reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
+	skcipher->reqsize = reqsize;
+}
+
 int crypto_register_skcipher(struct skcipher_alg *alg);
 void crypto_unregister_skcipher(struct skcipher_alg *alg);
 int crypto_register_skciphers(struct skcipher_alg *algs, int count);
@@ -140,71 +204,104 @@ void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
 int skcipher_register_instance(struct crypto_template *tmpl,
 			       struct skcipher_instance *inst);
 
-int skcipher_walk_done(struct skcipher_walk *walk, int err);
-int skcipher_walk_virt(struct skcipher_walk *walk,
-		       struct skcipher_request *req,
-		       bool atomic);
-void skcipher_walk_atomise(struct skcipher_walk *walk);
-int skcipher_walk_async(struct skcipher_walk *walk,
-			struct skcipher_request *req);
-int skcipher_walk_aead(struct skcipher_walk *walk, struct aead_request *req,
-		       bool atomic);
-int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
-			       struct aead_request *req, bool atomic);
-int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
-			       struct aead_request *req, bool atomic);
-void skcipher_walk_complete(struct skcipher_walk *walk, int err);
+int crypto_register_lskcipher(struct lskcipher_alg *alg);
+void crypto_unregister_lskcipher(struct lskcipher_alg *alg);
+int crypto_register_lskciphers(struct lskcipher_alg *algs, int count);
+void crypto_unregister_lskciphers(struct lskcipher_alg *algs, int count);
+int lskcipher_register_instance(struct crypto_template *tmpl,
+				struct lskcipher_instance *inst);
 
-static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
-					       int err)
+int skcipher_walk_done(struct skcipher_walk *walk, int res);
+int skcipher_walk_virt(struct skcipher_walk *__restrict walk,
+		       struct skcipher_request *__restrict req,
+		       bool atomic);
+int skcipher_walk_aead_encrypt(struct skcipher_walk *__restrict walk,
+			       struct aead_request *__restrict req,
+			       bool atomic);
+int skcipher_walk_aead_decrypt(struct skcipher_walk *__restrict walk,
+			       struct aead_request *__restrict req,
+			       bool atomic);
+
+static inline void skcipher_walk_abort(struct skcipher_walk *walk)
 {
-	req->base.complete(&req->base, err);
+	skcipher_walk_done(walk, -ECANCELED);
 }
 
-static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
+static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
 {
-	return req->base.flags;
+	return crypto_tfm_ctx(&tfm->base);
 }
 
-static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
+static inline void *crypto_lskcipher_ctx(struct crypto_lskcipher *tfm)
 {
 	return crypto_tfm_ctx(&tfm->base);
 }
 
+static inline void *crypto_skcipher_ctx_dma(struct crypto_skcipher *tfm)
+{
+	return crypto_tfm_ctx_dma(&tfm->base);
+}
+
 static inline void *skcipher_request_ctx(struct skcipher_request *req)
 {
 	return req->__ctx;
 }
 
+static inline void *skcipher_request_ctx_dma(struct skcipher_request *req)
+{
+	unsigned int align = crypto_dma_align();
+
+	if (align <= crypto_tfm_ctx_alignment())
+		align = 1;
+
+	return PTR_ALIGN(skcipher_request_ctx(req), align);
+}
+
 static inline u32 skcipher_request_flags(struct skcipher_request *req)
 {
 	return req->base.flags;
 }
 
-static inline unsigned int crypto_skcipher_alg_min_keysize(
-	struct skcipher_alg *alg)
+/* Helpers for simple block cipher modes of operation */
+struct skcipher_ctx_simple {
+	struct crypto_cipher *cipher;	/* underlying block cipher */
+};
+static inline struct crypto_cipher *
+skcipher_cipher_simple(struct crypto_skcipher *tfm)
 {
-	if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
-	    CRYPTO_ALG_TYPE_BLKCIPHER)
-		return alg->base.cra_blkcipher.min_keysize;
+	struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
 
-	if (alg->base.cra_ablkcipher.encrypt)
-		return alg->base.cra_ablkcipher.min_keysize;
+	return ctx->cipher;
+}
+
+struct skcipher_instance *skcipher_alloc_instance_simple(
+	struct crypto_template *tmpl, struct rtattr **tb);
+
+static inline struct crypto_alg *skcipher_ialg_simple(
+	struct skcipher_instance *inst)
+{
+	struct crypto_cipher_spawn *spawn = skcipher_instance_ctx(inst);
 
-	return alg->min_keysize;
+	return crypto_spawn_cipher_alg(spawn);
 }
 
-static inline unsigned int crypto_skcipher_alg_max_keysize(
-	struct skcipher_alg *alg)
+static inline struct crypto_lskcipher *lskcipher_cipher_simple(
+	struct crypto_lskcipher *tfm)
 {
-	if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
-	    CRYPTO_ALG_TYPE_BLKCIPHER)
-		return alg->base.cra_blkcipher.max_keysize;
+	struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);
 
-	if (alg->base.cra_ablkcipher.encrypt)
-		return alg->base.cra_ablkcipher.max_keysize;
+	return *ctx;
+}
+
+struct lskcipher_instance *lskcipher_alloc_instance_simple(
+	struct crypto_template *tmpl, struct rtattr **tb);
+
+static inline struct lskcipher_alg *lskcipher_ialg_simple(
+	struct lskcipher_instance *inst)
+{
+	struct crypto_lskcipher_spawn *spawn = lskcipher_instance_ctx(inst);
 
-	return alg->max_keysize;
+	return crypto_lskcipher_spawn_alg(spawn);
 }
 
 #endif	/* _CRYPTO_INTERNAL_SKCIPHER_H */