Adding upstream version 6.8.9.upstream/6.8.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 108 insertions, 25 deletions

diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h
index ea18af4834..c8857d7bdb 100644
--- a/include/crypto/skcipher.h
+++ b/include/crypto/skcipher.h
@@ -15,6 +15,17 @@
 #include <linux/string.h>
 #include <linux/types.h>
 
+/* Set this bit if the lskcipher operation is a continuation. */
+#define CRYPTO_LSKCIPHER_FLAG_CONT	0x00000001
+/* Set this bit if the lskcipher operation is final. */
+#define CRYPTO_LSKCIPHER_FLAG_FINAL	0x00000002
+/* The bit CRYPTO_TFM_REQ_MAY_SLEEP can also be set if needed. */
+
+/* Set this bit if the skcipher operation is a continuation. */
+#define CRYPTO_SKCIPHER_REQ_CONT	0x00000001
+/* Set this bit if the skcipher operation is not final. */
+#define CRYPTO_SKCIPHER_REQ_NOTFINAL	0x00000002
+
 struct scatterlist;
 
 /**
@@ -91,6 +102,7 @@ struct crypto_istat_cipher {
  *	    IV of exactly that size to perform the encrypt or decrypt operation.
  * @chunksize: Equal to the block size except for stream ciphers such as
  *	       CTR where it is set to the underlying block size.
+ * @statesize: Size of the internal state for the algorithm.
  * @stat: Statistics for cipher algorithm
  * @base: Definition of a generic crypto algorithm.
  */
@@ -99,6 +111,7 @@ struct crypto_istat_cipher {
 	unsigned int max_keysize;	\
 	unsigned int ivsize;		\
 	unsigned int chunksize;		\
+	unsigned int statesize;		\
 					\
 	SKCIPHER_ALG_COMMON_STAT	\
 					\
@@ -108,16 +121,6 @@ struct skcipher_alg_common SKCIPHER_ALG_COMMON;
 
 /**
  * struct skcipher_alg - symmetric key cipher definition
- * @min_keysize: Minimum key size supported by the transformation. This is the
- *		 smallest key length supported by this transformation algorithm.
- *		 This must be set to one of the pre-defined values as this is
- *		 not hardware specific. Possible values for this field can be
- *		 found via git grep "_MIN_KEY_SIZE" include/crypto/
- * @max_keysize: Maximum key size supported by the transformation. This is the
- *		 largest key length supported by this transformation algorithm.
- *		 This must be set to one of the pre-defined values as this is
- *		 not hardware specific. Possible values for this field can be
- *		 found via git grep "_MAX_KEY_SIZE" include/crypto/
  * @setkey: Set key for the transformation. This function is used to either
  *	    program a supplied key into the hardware or store the key in the
  *	    transformation context for programming it later. Note that this
@@ -141,6 +144,17 @@ struct skcipher_alg_common SKCIPHER_ALG_COMMON;
  *	     be called in parallel with the same transformation object.
  * @decrypt: Decrypt a single block. This is a reverse counterpart to @encrypt
  *	     and the conditions are exactly the same.
+ * @export: Export partial state of the transformation. This function dumps the
+ *	    entire state of the ongoing transformation into a provided block of
+ *	    data so it can be @import 'ed back later on. This is useful in case
+ *	    you want to save partial result of the transformation after
+ *	    processing certain amount of data and reload this partial result
+ *	    multiple times later on for multiple re-use. No data processing
+ *	    happens at this point.
+ * @import: Import partial state of the transformation. This function loads the
+ *	    entire state of the ongoing transformation from a provided block of
+ *	    data so the transformation can continue from this point onward. No
+ *	    data processing happens at this point.
  * @init: Initialize the cryptographic transformation object. This function
  *	  is used to initialize the cryptographic transformation object.
  *	  This function is called only once at the instantiation time, right
@@ -152,15 +166,9 @@ struct skcipher_alg_common SKCIPHER_ALG_COMMON;
  * @exit: Deinitialize the cryptographic transformation object. This is a
  *	  counterpart to @init, used to remove various changes set in
  *	  @init.
- * @ivsize: IV size applicable for transformation. The consumer must provide an
- *	    IV of exactly that size to perform the encrypt or decrypt operation.
- * @chunksize: Equal to the block size except for stream ciphers such as
- *	       CTR where it is set to the underlying block size.
  * @walksize: Equal to the chunk size except in cases where the algorithm is
  * 	      considerably more efficient if it can operate on multiple chunks
  * 	      in parallel. Should be a multiple of chunksize.
- * @stat: Statistics for cipher algorithm
- * @base: Definition of a generic crypto algorithm.
  * @co: see struct skcipher_alg_common
  *
  * All fields except @ivsize are mandatory and must be filled.
@@ -170,6 +178,8 @@ struct skcipher_alg {
 	              unsigned int keylen);
 	int (*encrypt)(struct skcipher_request *req);
 	int (*decrypt)(struct skcipher_request *req);
+	int (*export)(struct skcipher_request *req, void *out);
+	int (*import)(struct skcipher_request *req, const void *in);
 	int (*init)(struct crypto_skcipher *tfm);
 	void (*exit)(struct crypto_skcipher *tfm);
 
@@ -200,6 +210,9 @@ struct skcipher_alg {
  *	     may be left over if length is not a multiple of blocks
  *	     and there is more to come (final == false).  The number of
  *	     left-over bytes should be returned in case of success.
+ *	     The siv field shall be as long as ivsize + statesize with
+ *	     the IV placed at the front.  The state will be used by the
+ *	     algorithm internally.
  * @decrypt: Decrypt a number of bytes. This is a reverse counterpart to
  *	     @encrypt and the conditions are exactly the same.
  * @init: Initialize the cryptographic transformation object. This function
@@ -215,9 +228,9 @@ struct lskcipher_alg {
 	int (*setkey)(struct crypto_lskcipher *tfm, const u8 *key,
 	              unsigned int keylen);
 	int (*encrypt)(struct crypto_lskcipher *tfm, const u8 *src,
-		       u8 *dst, unsigned len, u8 *iv, bool final);
+		       u8 *dst, unsigned len, u8 *siv, u32 flags);
 	int (*decrypt)(struct crypto_lskcipher *tfm, const u8 *src,
-		       u8 *dst, unsigned len, u8 *iv, bool final);
+		       u8 *dst, unsigned len, u8 *siv, u32 flags);
 	int (*init)(struct crypto_lskcipher *tfm);
 	void (*exit)(struct crypto_lskcipher *tfm);
 
@@ -496,6 +509,40 @@ static inline unsigned int crypto_lskcipher_chunksize(
 	return crypto_lskcipher_alg(tfm)->co.chunksize;
 }
 
+/**
+ * crypto_skcipher_statesize() - obtain state size
+ * @tfm: cipher handle
+ *
+ * Some algorithms cannot be chained with the IV alone.  They carry
+ * internal state which must be replicated if data is to be processed
+ * incrementally.  The size of that state can be obtained with this
+ * function.
+ *
+ * Return: state size in bytes
+ */
+static inline unsigned int crypto_skcipher_statesize(
+	struct crypto_skcipher *tfm)
+{
+	return crypto_skcipher_alg_common(tfm)->statesize;
+}
+
+/**
+ * crypto_lskcipher_statesize() - obtain state size
+ * @tfm: cipher handle
+ *
+ * Some algorithms cannot be chained with the IV alone.  They carry
+ * internal state which must be replicated if data is to be processed
+ * incrementally.  The size of that state can be obtained with this
+ * function.
+ *
+ * Return: state size in bytes
+ */
+static inline unsigned int crypto_lskcipher_statesize(
+	struct crypto_lskcipher *tfm)
+{
+	return crypto_lskcipher_alg(tfm)->co.statesize;
+}
+
 static inline unsigned int crypto_sync_skcipher_blocksize(
 	struct crypto_sync_skcipher *tfm)
 {
@@ -684,14 +731,48 @@ int crypto_skcipher_encrypt(struct skcipher_request *req);
 int crypto_skcipher_decrypt(struct skcipher_request *req);
 
 /**
+ * crypto_skcipher_export() - export partial state
+ * @req: reference to the skcipher_request handle that holds all information
+ *	 needed to perform the operation
+ * @out: output buffer of sufficient size that can hold the state
+ *
+ * Export partial state of the transformation. This function dumps the
+ * entire state of the ongoing transformation into a provided block of
+ * data so it can be @import 'ed back later on. This is useful in case
+ * you want to save partial result of the transformation after
+ * processing certain amount of data and reload this partial result
+ * multiple times later on for multiple re-use. No data processing
+ * happens at this point.
+ *
+ * Return: 0 if the cipher operation was successful; < 0 if an error occurred
+ */
+int crypto_skcipher_export(struct skcipher_request *req, void *out);
+
+/**
+ * crypto_skcipher_import() - import partial state
+ * @req: reference to the skcipher_request handle that holds all information
+ *	 needed to perform the operation
+ * @in: buffer holding the state
+ *
+ * Import partial state of the transformation. This function loads the
+ * entire state of the ongoing transformation from a provided block of
+ * data so the transformation can continue from this point onward. No
+ * data processing happens at this point.
+ *
+ * Return: 0 if the cipher operation was successful; < 0 if an error occurred
+ */
+int crypto_skcipher_import(struct skcipher_request *req, const void *in);
+
+/**
  * crypto_lskcipher_encrypt() - encrypt plaintext
  * @tfm: lskcipher handle
  * @src: source buffer
  * @dst: destination buffer
  * @len: number of bytes to process
- * @iv: IV for the cipher operation which must comply with the IV size defined
- *      by crypto_lskcipher_ivsize
- *
+ * @siv: IV + state for the cipher operation.  The length of the IV must
+ *	 comply with the IV size defined by crypto_lskcipher_ivsize.  The
+ *	 IV is then followed with a buffer with the length as specified by
+ *	 crypto_lskcipher_statesize.
  * Encrypt plaintext data using the lskcipher handle.
  *
  * Return: >=0 if the cipher operation was successful, if positive
@@ -699,7 +780,7 @@ int crypto_skcipher_decrypt(struct skcipher_request *req);
  *	   < 0 if an error occurred
  */
 int crypto_lskcipher_encrypt(struct crypto_lskcipher *tfm, const u8 *src,
-			     u8 *dst, unsigned len, u8 *iv);
+			     u8 *dst, unsigned len, u8 *siv);
 
 /**
  * crypto_lskcipher_decrypt() - decrypt ciphertext
@@ -707,8 +788,10 @@ int crypto_lskcipher_encrypt(struct crypto_lskcipher *tfm, const u8 *src,
  * @src: source buffer
  * @dst: destination buffer
  * @len: number of bytes to process
- * @iv: IV for the cipher operation which must comply with the IV size defined
- *      by crypto_lskcipher_ivsize
+ * @siv: IV + state for the cipher operation.  The length of the IV must
+ *	 comply with the IV size defined by crypto_lskcipher_ivsize.  The
+ *	 IV is then followed with a buffer with the length as specified by
+ *	 crypto_lskcipher_statesize.
  *
  * Decrypt ciphertext data using the lskcipher handle.
  *
@@ -717,7 +800,7 @@ int crypto_lskcipher_encrypt(struct crypto_lskcipher *tfm, const u8 *src,
  *	   < 0 if an error occurred
  */
 int crypto_lskcipher_decrypt(struct crypto_lskcipher *tfm, const u8 *src,
-			     u8 *dst, unsigned len, u8 *iv);
+			     u8 *dst, unsigned len, u8 *siv);
 
 /**
  * DOC: Symmetric Key Cipher Request Handle