ENGR00112200 Add cryptodev device

Linux driver for /dev/crypto (aka CryptoDev)
See http://www.logix.cz/michal/devel/cryptodev for details.

Signed-off-by: Michal Ludvig <mludvig@suse.cz>
Signed-off-by: Rob Herring <r.herring@freescale.com>

2 files changed, 83 insertions, 0 deletions

diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 9aa9bcadf869..efc5adaf0d61 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -52,6 +52,7 @@ header-y += comstats.h
 header-y += const.h
 header-y += cgroupstats.h
 header-y += cramfs_fs.h
+header-y += cryptodev.h
 header-y += cycx_cfm.h
 header-y += dcbnl.h
 header-y += dlmconstants.h
diff --git a/include/linux/cryptodev.h b/include/linux/cryptodev.h
new file mode 100644
index 000000000000..0f8f6705cdc9
--- /dev/null
+++ b/include/linux/cryptodev.h
@@ -0,0 +1,82 @@
+/*
+ * Driver for /dev/crypto device (aka CryptoDev)
+ *
+ * Copyright (c) 2004 Michal Ludvig <mludvig@suse.cz>, SuSE Labs
+ *
+ * Structures and ioctl command names were taken from
+ * OpenBSD to preserve compatibility with their API.
+ *
+ */
+
+#ifndef _CRYPTODEV_H
+#define _CRYPTODEV_H
+
+#ifndef __KERNEL__
+#include <inttypes.h>
+#endif
+
+#define	CRYPTODEV_MINOR	MISC_DYNAMIC_MINOR
+
+#define CRYPTO_FLAG_ECB		0x0000
+#define CRYPTO_FLAG_CBC		0x0001
+#define CRYPTO_FLAG_CFB		0x0002
+#define CRYPTO_FLAG_OFB		0x0003
+#define CRYPTO_FLAG_CTR		0x0004
+#define CRYPTO_FLAG_HMAC	0x0010
+#define CRYPTO_FLAG_MASK	0x00FF
+
+#define	CRYPTO_CIPHER_NAME	0x0100
+#define	CRYPTO_CIPHER_NAME_CBC	(CRYPTO_CIPHER_NAME | CRYPTO_FLAG_CBC)
+#define	CRYPTO_HASH_NAME	0x0200
+#define	CRYPTO_HASH_NAME_HMAC	(CRYPTO_HASH_NAME | CRYPTO_FLAG_HMAC)
+
+/* ioctl parameter to create a session */
+struct session_op {
+	unsigned int	cipher;		/* e.g. CRYPTO_DES_CBC */
+	unsigned int	mac;		/* e.g. CRYPTO_MD5_HMAC */
+	char		*alg_name;	/* set cipher=CRYPTO_CIPHER_NAME
+					   or  mac=CRYPTO_HASH_NAME */
+	#define	MAX_ALG_NAME_LEN 128
+	size_t		alg_namelen;
+
+	size_t		keylen;		/* cipher key */
+	char		*key;
+	int		mackeylen;	/* mac key */
+	char		*mackey;
+
+	/* Return values */
+	unsigned int	blocksize;	/* selected algorithm's block size */
+	uint32_t	ses;		/* session ID */
+};
+
+/* ioctl parameter to request a crypt/decrypt operation against a session  */
+struct crypt_op {
+	uint32_t	ses;		/* from session_op->ses */
+	#define COP_DECRYPT	0
+	#define COP_ENCRYPT	1
+	uint32_t	op;		/* ie. COP_ENCRYPT */
+	uint32_t	flags;		/* unused */
+
+	size_t		len;
+	char		*src, *dst;
+	char		*mac;
+	char		*iv;
+};
+
+/* clone original filedescriptor */
+#define CRIOGET         _IOWR('c', 100, uint32_t)
+
+/* create crypto session */
+#define CIOCGSESSION    _IOWR('c', 101, struct session_op)
+
+/* finish crypto session */
+#define CIOCFSESSION    _IOW('c', 102, uint32_t)
+
+/* request encryption/decryptions of a given buffer */
+#define CIOCCRYPT       _IOWR('c', 103, struct crypt_op)
+
+/* ioctl()s for asym-crypto. Not yet supported. */
+#define CIOCKEY         _IOWR('c', 104, void *)
+#define CIOCASYMFEAT    _IOR('c', 105, uint32_t)
+
+#endif /* _CRYPTODEV_H */