213 lines
6.1 KiB
C
213 lines
6.1 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _AES_IMPL_H
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#define _AES_IMPL_H
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/*
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* Common definitions used by AES.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <sys/zfs_context.h>
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#include <sys/crypto/common.h>
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/* Similar to sysmacros.h IS_P2ALIGNED, but checks two pointers: */
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#define IS_P2ALIGNED2(v, w, a) \
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((((uintptr_t)(v) | (uintptr_t)(w)) & ((uintptr_t)(a) - 1)) == 0)
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#define AES_BLOCK_LEN 16 /* bytes */
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/* Round constant length, in number of 32-bit elements: */
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#define RC_LENGTH (5 * ((AES_BLOCK_LEN) / 4 - 2))
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#define AES_COPY_BLOCK(src, dst) \
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(dst)[0] = (src)[0]; \
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(dst)[1] = (src)[1]; \
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(dst)[2] = (src)[2]; \
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(dst)[3] = (src)[3]; \
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(dst)[4] = (src)[4]; \
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(dst)[5] = (src)[5]; \
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(dst)[6] = (src)[6]; \
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(dst)[7] = (src)[7]; \
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(dst)[8] = (src)[8]; \
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(dst)[9] = (src)[9]; \
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(dst)[10] = (src)[10]; \
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(dst)[11] = (src)[11]; \
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(dst)[12] = (src)[12]; \
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(dst)[13] = (src)[13]; \
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(dst)[14] = (src)[14]; \
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(dst)[15] = (src)[15]
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#define AES_XOR_BLOCK(src, dst) \
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(dst)[0] ^= (src)[0]; \
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(dst)[1] ^= (src)[1]; \
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(dst)[2] ^= (src)[2]; \
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(dst)[3] ^= (src)[3]; \
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(dst)[4] ^= (src)[4]; \
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(dst)[5] ^= (src)[5]; \
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(dst)[6] ^= (src)[6]; \
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(dst)[7] ^= (src)[7]; \
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(dst)[8] ^= (src)[8]; \
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(dst)[9] ^= (src)[9]; \
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(dst)[10] ^= (src)[10]; \
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(dst)[11] ^= (src)[11]; \
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(dst)[12] ^= (src)[12]; \
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(dst)[13] ^= (src)[13]; \
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(dst)[14] ^= (src)[14]; \
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(dst)[15] ^= (src)[15]
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/* AES key size definitions */
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#define AES_MINBITS 128
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#define AES_MINBYTES ((AES_MINBITS) >> 3)
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#define AES_MAXBITS 256
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#define AES_MAXBYTES ((AES_MAXBITS) >> 3)
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#define AES_MIN_KEY_BYTES ((AES_MINBITS) >> 3)
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#define AES_MAX_KEY_BYTES ((AES_MAXBITS) >> 3)
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#define AES_192_KEY_BYTES 24
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#define AES_IV_LEN 16
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/* AES key schedule may be implemented with 32- or 64-bit elements: */
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#define AES_32BIT_KS 32
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#define AES_64BIT_KS 64
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#define MAX_AES_NR 14 /* Maximum number of rounds */
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#define MAX_AES_NB 4 /* Number of columns comprising a state */
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typedef union {
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#ifdef sun4u
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uint64_t ks64[((MAX_AES_NR) + 1) * (MAX_AES_NB)];
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#endif
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uint32_t ks32[((MAX_AES_NR) + 1) * (MAX_AES_NB)];
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} aes_ks_t;
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typedef struct aes_impl_ops aes_impl_ops_t;
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typedef struct aes_key aes_key_t;
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struct aes_key {
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aes_ks_t encr_ks; /* encryption key schedule */
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aes_ks_t decr_ks; /* decryption key schedule */
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#ifdef __amd64
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long double align128; /* Align fields above for Intel AES-NI */
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#endif /* __amd64 */
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const aes_impl_ops_t *ops; /* ops associated with this schedule */
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int nr; /* number of rounds (10, 12, or 14) */
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int type; /* key schedule size (32 or 64 bits) */
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};
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/*
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* Core AES functions.
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* ks and keysched are pointers to aes_key_t.
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* They are declared void* as they are intended to be opaque types.
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* Use function aes_alloc_keysched() to allocate memory for ks and keysched.
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*/
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extern void *aes_alloc_keysched(size_t *size, int kmflag);
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extern void aes_init_keysched(const uint8_t *cipherKey, uint_t keyBits,
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void *keysched);
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extern int aes_encrypt_block(const void *ks, const uint8_t *pt, uint8_t *ct);
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extern int aes_decrypt_block(const void *ks, const uint8_t *ct, uint8_t *pt);
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/*
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* AES mode functions.
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* The first 2 functions operate on 16-byte AES blocks.
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*/
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extern void aes_copy_block(uint8_t *in, uint8_t *out);
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extern void aes_xor_block(uint8_t *data, uint8_t *dst);
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/* Note: ctx is a pointer to aes_ctx_t defined in modes.h */
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extern int aes_encrypt_contiguous_blocks(void *ctx, char *data, size_t length,
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crypto_data_t *out);
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extern int aes_decrypt_contiguous_blocks(void *ctx, char *data, size_t length,
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crypto_data_t *out);
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/*
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* The following definitions and declarations are only used by AES FIPS POST
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*/
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#ifdef _AES_IMPL
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typedef enum aes_mech_type {
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AES_ECB_MECH_INFO_TYPE, /* SUN_CKM_AES_ECB */
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AES_CBC_MECH_INFO_TYPE, /* SUN_CKM_AES_CBC */
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AES_CBC_PAD_MECH_INFO_TYPE, /* SUN_CKM_AES_CBC_PAD */
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AES_CTR_MECH_INFO_TYPE, /* SUN_CKM_AES_CTR */
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AES_CCM_MECH_INFO_TYPE, /* SUN_CKM_AES_CCM */
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AES_GCM_MECH_INFO_TYPE, /* SUN_CKM_AES_GCM */
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AES_GMAC_MECH_INFO_TYPE /* SUN_CKM_AES_GMAC */
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} aes_mech_type_t;
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#endif /* _AES_IMPL */
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/*
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* Methods used to define AES implementation
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*
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* @aes_gen_f Key generation
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* @aes_enc_f Function encrypts one block
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* @aes_dec_f Function decrypts one block
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* @aes_will_work_f Function tests whether method will function
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*/
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typedef void (*aes_generate_f)(aes_key_t *, const uint32_t *, int);
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typedef void (*aes_encrypt_f)(const uint32_t[], int,
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const uint32_t[4], uint32_t[4]);
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typedef void (*aes_decrypt_f)(const uint32_t[], int,
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const uint32_t[4], uint32_t[4]);
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typedef boolean_t (*aes_will_work_f)(void);
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#define AES_IMPL_NAME_MAX (16)
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struct aes_impl_ops {
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aes_generate_f generate;
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aes_encrypt_f encrypt;
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aes_decrypt_f decrypt;
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aes_will_work_f is_supported;
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boolean_t needs_byteswap;
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char name[AES_IMPL_NAME_MAX];
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};
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extern const aes_impl_ops_t aes_generic_impl;
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#if defined(__x86_64)
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extern const aes_impl_ops_t aes_x86_64_impl;
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#endif
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#if defined(__x86_64) && defined(HAVE_AES)
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extern const aes_impl_ops_t aes_aesni_impl;
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#endif
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/*
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* Initializes fastest implementation
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*/
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void aes_impl_init(void *arg);
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/*
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* Returns optimal allowed AES implementation
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*/
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const struct aes_impl_ops *aes_impl_get_ops(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _AES_IMPL_H */
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