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