OpenWrt – Rev 4
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/* This is a source compatible implementation with the original API of
* cryptodev by Angelos D. Keromytis, found at openbsd cryptodev.h.
* Placed under public domain */
#ifndef L_CRYPTODEV_H
#define L_CRYPTODEV_H
#include <linux/types.h>
#ifndef __KERNEL__
#define __user
#endif
/* API extensions for linux */
#define CRYPTO_HMAC_MAX_KEY_LEN 512
#define CRYPTO_CIPHER_MAX_KEY_LEN 64
/* All the supported algorithms
*/
enum cryptodev_crypto_op_t {
CRYPTO_DES_CBC = 1,
CRYPTO_3DES_CBC = 2,
CRYPTO_BLF_CBC = 3,
CRYPTO_CAST_CBC = 4,
CRYPTO_SKIPJACK_CBC = 5,
CRYPTO_MD5_HMAC = 6,
CRYPTO_SHA1_HMAC = 7,
CRYPTO_RIPEMD160_HMAC = 8,
CRYPTO_MD5_KPDK = 9,
CRYPTO_SHA1_KPDK = 10,
CRYPTO_RIJNDAEL128_CBC = 11,
CRYPTO_AES_CBC = CRYPTO_RIJNDAEL128_CBC,
CRYPTO_ARC4 = 12,
CRYPTO_MD5 = 13,
CRYPTO_SHA1 = 14,
CRYPTO_DEFLATE_COMP = 15,
CRYPTO_NULL = 16,
CRYPTO_LZS_COMP = 17,
CRYPTO_SHA2_256_HMAC = 18,
CRYPTO_SHA2_384_HMAC = 19,
CRYPTO_SHA2_512_HMAC = 20,
CRYPTO_AES_CTR = 21,
CRYPTO_AES_XTS = 22,
CRYPTO_AES_ECB = 23,
CRYPTO_AES_GCM = 50,
CRYPTO_CAMELLIA_CBC = 101,
CRYPTO_RIPEMD160,
CRYPTO_SHA2_224,
CRYPTO_SHA2_256,
CRYPTO_SHA2_384,
CRYPTO_SHA2_512,
CRYPTO_SHA2_224_HMAC,
CRYPTO_ALGORITHM_ALL, /* Keep updated - see below */
};
#define CRYPTO_ALGORITHM_MAX (CRYPTO_ALGORITHM_ALL - 1)
/* Values for ciphers */
#define DES_BLOCK_LEN 8
#define DES3_BLOCK_LEN 8
#define RIJNDAEL128_BLOCK_LEN 16
#define AES_BLOCK_LEN RIJNDAEL128_BLOCK_LEN
#define CAMELLIA_BLOCK_LEN 16
#define BLOWFISH_BLOCK_LEN 8
#define SKIPJACK_BLOCK_LEN 8
#define CAST128_BLOCK_LEN 8
/* the maximum of the above */
#define EALG_MAX_BLOCK_LEN 16
/* Values for hashes/MAC */
#define AALG_MAX_RESULT_LEN 64
/* maximum length of verbose alg names (depends on CRYPTO_MAX_ALG_NAME) */
#define CRYPTODEV_MAX_ALG_NAME 64
#define HASH_MAX_LEN 64
/* input of CIOCGSESSION */
struct session_op {
/* Specify either cipher or mac
*/
__u32 cipher; /* cryptodev_crypto_op_t */
__u32 mac; /* cryptodev_crypto_op_t */
__u32 keylen;
__u8 __user *key;
__u32 mackeylen;
__u8 __user *mackey;
__u32 ses; /* session identifier */
};
struct session_info_op {
__u32 ses; /* session identifier */
/* verbose names for the requested ciphers */
struct alg_info {
char cra_name[CRYPTODEV_MAX_ALG_NAME];
char cra_driver_name[CRYPTODEV_MAX_ALG_NAME];
} cipher_info, hash_info;
__u16 alignmask; /* alignment constraints */
__u32 flags; /* SIOP_FLAGS_* */
};
/* If this flag is set then this algorithm uses
* a driver only available in kernel (software drivers,
* or drivers based on instruction sets do not set this flag).
*
* If multiple algorithms are involved (as in AEAD case), then
* if one of them is kernel-driver-only this flag will be set.
*/
#define SIOP_FLAG_KERNEL_DRIVER_ONLY 1
#define COP_ENCRYPT 0
#define COP_DECRYPT 1
/* input of CIOCCRYPT */
struct crypt_op {
__u32 ses; /* session identifier */
__u16 op; /* COP_ENCRYPT or COP_DECRYPT */
__u16 flags; /* see COP_FLAG_* */
__u32 len; /* length of source data */
__u8 __user *src; /* source data */
__u8 __user *dst; /* pointer to output data */
/* pointer to output data for hash/MAC operations */
__u8 __user *mac;
/* initialization vector for encryption operations */
__u8 __user *iv;
};
/* input of CIOCAUTHCRYPT */
struct crypt_auth_op {
__u32 ses; /* session identifier */
__u16 op; /* COP_ENCRYPT or COP_DECRYPT */
__u16 flags; /* see COP_FLAG_AEAD_* */
__u32 len; /* length of source data */
__u32 auth_len; /* length of auth data */
__u8 __user *auth_src; /* authenticated-only data */
/* The current implementation is more efficient if data are
* encrypted in-place (src==dst). */
__u8 __user *src; /* data to be encrypted and authenticated */
__u8 __user *dst; /* pointer to output data. Must have
* space for tag. For TLS this should be at least
* len + tag_size + block_size for padding */
__u8 __user *tag; /* where the tag will be copied to. TLS mode
* doesn't use that as tag is copied to dst.
* SRTP mode copies tag there. */
__u32 tag_len; /* the length of the tag. Use zero for digest size or max tag. */
/* initialization vector for encryption operations */
__u8 __user *iv;
__u32 iv_len;
};
/* In plain AEAD mode the following are required:
* flags : 0
* iv : the initialization vector (12 bytes)
* auth_len: the length of the data to be authenticated
* auth_src: the data to be authenticated
* len : length of data to be encrypted
* src : the data to be encrypted
* dst : space to hold encrypted data. It must have
* at least a size of len + tag_size.
* tag_size: the size of the desired authentication tag or zero to use
* the maximum tag output.
*
* Note tag isn't being used because the Linux AEAD interface
* copies the tag just after data.
*/
/* In TLS mode (used for CBC ciphers that required padding)
* the following are required:
* flags : COP_FLAG_AEAD_TLS_TYPE
* iv : the initialization vector
* auth_len: the length of the data to be authenticated only
* len : length of data to be encrypted
* auth_src: the data to be authenticated
* src : the data to be encrypted
* dst : space to hold encrypted data (preferably in-place). It must have
* at least a size of len + tag_size + blocksize.
* tag_size: the size of the desired authentication tag or zero to use
* the default mac output.
*
* Note that the padding used is the minimum padding.
*/
/* In SRTP mode the following are required:
* flags : COP_FLAG_AEAD_SRTP_TYPE
* iv : the initialization vector
* auth_len: the length of the data to be authenticated. This must
* include the SRTP header + SRTP payload (data to be encrypted) + rest
*
* len : length of data to be encrypted
* auth_src: pointer the data to be authenticated. Should point at the same buffer as src.
* src : pointer to the data to be encrypted.
* dst : This is mandatory to be the same as src (in-place only).
* tag_size: the size of the desired authentication tag or zero to use
* the default mac output.
* tag : Pointer to an address where the authentication tag will be copied.
*/
/* struct crypt_op flags */
#define COP_FLAG_NONE (0 << 0) /* totally no flag */
#define COP_FLAG_UPDATE (1 << 0) /* multi-update hash mode */
#define COP_FLAG_FINAL (1 << 1) /* multi-update final hash mode */
#define COP_FLAG_WRITE_IV (1 << 2) /* update the IV during operation */
#define COP_FLAG_NO_ZC (1 << 3) /* do not zero-copy */
#define COP_FLAG_AEAD_TLS_TYPE (1 << 4) /* authenticate and encrypt using the
* TLS protocol rules */
#define COP_FLAG_AEAD_SRTP_TYPE (1 << 5) /* authenticate and encrypt using the
* SRTP protocol rules */
#define COP_FLAG_RESET (1 << 6) /* multi-update reset the state.
* should be used in combination
* with COP_FLAG_UPDATE */
/* Stuff for bignum arithmetic and public key
* cryptography - not supported yet by linux
* cryptodev.
*/
#define CRYPTO_ALG_FLAG_SUPPORTED 1
#define CRYPTO_ALG_FLAG_RNG_ENABLE 2
#define CRYPTO_ALG_FLAG_DSA_SHA 4
struct crparam {
__u8 *crp_p;
__u32 crp_nbits;
};
#define CRK_MAXPARAM 8
/* input of CIOCKEY */
struct crypt_kop {
__u32 crk_op; /* cryptodev_crk_op_t */
__u32 crk_status;
__u16 crk_iparams;
__u16 crk_oparams;
__u32 crk_pad1;
struct crparam crk_param[CRK_MAXPARAM];
};
enum cryptodev_crk_op_t {
CRK_MOD_EXP = 0,
CRK_MOD_EXP_CRT = 1,
CRK_DSA_SIGN = 2,
CRK_DSA_VERIFY = 3,
CRK_DH_COMPUTE_KEY = 4,
CRK_ALGORITHM_ALL
};
#define CRK_ALGORITHM_MAX (CRK_ALGORITHM_ALL-1)
/* features to be queried with CIOCASYMFEAT ioctl
*/
#define CRF_MOD_EXP (1 << CRK_MOD_EXP)
#define CRF_MOD_EXP_CRT (1 << CRK_MOD_EXP_CRT)
#define CRF_DSA_SIGN (1 << CRK_DSA_SIGN)
#define CRF_DSA_VERIFY (1 << CRK_DSA_VERIFY)
#define CRF_DH_COMPUTE_KEY (1 << CRK_DH_COMPUTE_KEY)
/* ioctl's. Compatible with old linux cryptodev.h
*/
#define CRIOGET _IOWR('c', 101, __u32)
#define CIOCGSESSION _IOWR('c', 102, struct session_op)
#define CIOCFSESSION _IOW('c', 103, __u32)
#define CIOCCRYPT _IOWR('c', 104, struct crypt_op)
#define CIOCKEY _IOWR('c', 105, struct crypt_kop)
#define CIOCASYMFEAT _IOR('c', 106, __u32)
#define CIOCGSESSINFO _IOWR('c', 107, struct session_info_op)
/* to indicate that CRIOGET is not required in linux
*/
#define CRIOGET_NOT_NEEDED 1
/* additional ioctls for AEAD */
#define CIOCAUTHCRYPT _IOWR('c', 109, struct crypt_auth_op)
/* additional ioctls for asynchronous operation.
* These are conditionally enabled since version 1.6.
*/
#define CIOCASYNCCRYPT _IOW('c', 110, struct crypt_op)
#define CIOCASYNCFETCH _IOR('c', 111, struct crypt_op)
#endif /* L_CRYPTODEV_H */