1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _AES_IMPL_H 27 #define _AES_IMPL_H 28 29 /* 30 * Common definitions used by AES. 31 */ 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 #include <sys/zfs_context.h> 38 #include <sys/crypto/common.h> 39 #include <sys/asm_linkage.h> 40 41 /* Similar to sysmacros.h IS_P2ALIGNED, but checks two pointers: */ 42 #define IS_P2ALIGNED2(v, w, a) \ 43 ((((uintptr_t)(v) | (uintptr_t)(w)) & ((uintptr_t)(a) - 1)) == 0) 44 45 #define AES_BLOCK_LEN 16 /* bytes */ 46 /* Round constant length, in number of 32-bit elements: */ 47 #define RC_LENGTH (5 * ((AES_BLOCK_LEN) / 4 - 2)) 48 49 #define AES_COPY_BLOCK(src, dst) \ 50 (dst)[0] = (src)[0]; \ 51 (dst)[1] = (src)[1]; \ 52 (dst)[2] = (src)[2]; \ 53 (dst)[3] = (src)[3]; \ 54 (dst)[4] = (src)[4]; \ 55 (dst)[5] = (src)[5]; \ 56 (dst)[6] = (src)[6]; \ 57 (dst)[7] = (src)[7]; \ 58 (dst)[8] = (src)[8]; \ 59 (dst)[9] = (src)[9]; \ 60 (dst)[10] = (src)[10]; \ 61 (dst)[11] = (src)[11]; \ 62 (dst)[12] = (src)[12]; \ 63 (dst)[13] = (src)[13]; \ 64 (dst)[14] = (src)[14]; \ 65 (dst)[15] = (src)[15] 66 67 #define AES_XOR_BLOCK(src, dst) \ 68 (dst)[0] ^= (src)[0]; \ 69 (dst)[1] ^= (src)[1]; \ 70 (dst)[2] ^= (src)[2]; \ 71 (dst)[3] ^= (src)[3]; \ 72 (dst)[4] ^= (src)[4]; \ 73 (dst)[5] ^= (src)[5]; \ 74 (dst)[6] ^= (src)[6]; \ 75 (dst)[7] ^= (src)[7]; \ 76 (dst)[8] ^= (src)[8]; \ 77 (dst)[9] ^= (src)[9]; \ 78 (dst)[10] ^= (src)[10]; \ 79 (dst)[11] ^= (src)[11]; \ 80 (dst)[12] ^= (src)[12]; \ 81 (dst)[13] ^= (src)[13]; \ 82 (dst)[14] ^= (src)[14]; \ 83 (dst)[15] ^= (src)[15] 84 85 /* AES key size definitions */ 86 #define AES_MINBITS 128 87 #define AES_MAXBITS 256 88 89 /* AES key schedule may be implemented with 32- or 64-bit elements: */ 90 #define AES_32BIT_KS 32 91 #define AES_64BIT_KS 64 92 93 #define MAX_AES_NR 14 /* Maximum number of rounds */ 94 #define MAX_AES_NB 4 /* Number of columns comprising a state */ 95 96 typedef union { 97 #ifdef sun4u 98 uint64_t ks64[((MAX_AES_NR) + 1) * (MAX_AES_NB)]; 99 #endif 100 uint32_t ks32[((MAX_AES_NR) + 1) * (MAX_AES_NB)]; 101 } aes_ks_t; 102 103 typedef struct aes_impl_ops aes_impl_ops_t; 104 105 /* 106 * The absolute offset of the encr_ks (0) and the nr (504) fields are hard 107 * coded in aesni-gcm-x86_64, so please don't change (or adjust accordingly). 108 */ 109 typedef struct aes_key aes_key_t; 110 struct aes_key { 111 aes_ks_t encr_ks; /* encryption key schedule */ 112 aes_ks_t decr_ks; /* decryption key schedule */ 113 #ifdef __amd64 114 long double align128; /* Align fields above for Intel AES-NI */ 115 #endif /* __amd64 */ 116 const aes_impl_ops_t *ops; /* ops associated with this schedule */ 117 int nr; /* number of rounds (10, 12, or 14) */ 118 int type; /* key schedule size (32 or 64 bits) */ 119 }; 120 121 /* 122 * Core AES functions. 123 * ks and keysched are pointers to aes_key_t. 124 * They are declared void* as they are intended to be opaque types. 125 * Use function aes_alloc_keysched() to allocate memory for ks and keysched. 126 */ 127 extern void *aes_alloc_keysched(size_t *size, int kmflag); 128 extern void aes_init_keysched(const uint8_t *cipherKey, uint_t keyBits, 129 void *keysched); 130 extern int aes_encrypt_block(const void *ks, const uint8_t *pt, uint8_t *ct); 131 extern int aes_decrypt_block(const void *ks, const uint8_t *ct, uint8_t *pt); 132 133 /* 134 * AES mode functions. 135 * The first 2 functions operate on 16-byte AES blocks. 136 */ 137 extern void aes_copy_block(uint8_t *in, uint8_t *out); 138 extern void aes_xor_block(uint8_t *data, uint8_t *dst); 139 140 /* Note: ctx is a pointer to aes_ctx_t defined in modes.h */ 141 extern int aes_encrypt_contiguous_blocks(void *ctx, char *data, size_t length, 142 crypto_data_t *out); 143 extern int aes_decrypt_contiguous_blocks(void *ctx, char *data, size_t length, 144 crypto_data_t *out); 145 146 /* 147 * The following definitions and declarations are only used by AES FIPS POST 148 */ 149 #ifdef _AES_IMPL 150 151 typedef enum aes_mech_type { 152 AES_CCM_MECH_INFO_TYPE, /* SUN_CKM_AES_CCM */ 153 AES_GCM_MECH_INFO_TYPE, /* SUN_CKM_AES_GCM */ 154 } aes_mech_type_t; 155 156 #endif /* _AES_IMPL */ 157 158 /* 159 * Methods used to define AES implementation 160 * 161 * @aes_gen_f Key generation 162 * @aes_enc_f Function encrypts one block 163 * @aes_dec_f Function decrypts one block 164 * @aes_will_work_f Function tests whether method will function 165 */ 166 typedef void (*aes_generate_f)(aes_key_t *, const uint32_t *, int); 167 typedef void (*aes_encrypt_f)(const uint32_t[], int, 168 const uint32_t[4], uint32_t[4]); 169 typedef void (*aes_decrypt_f)(const uint32_t[], int, 170 const uint32_t[4], uint32_t[4]); 171 typedef boolean_t (*aes_will_work_f)(void); 172 173 #define AES_IMPL_NAME_MAX (16) 174 175 struct aes_impl_ops { 176 aes_generate_f generate; 177 aes_encrypt_f encrypt; 178 aes_decrypt_f decrypt; 179 aes_will_work_f is_supported; 180 boolean_t needs_byteswap; 181 char name[AES_IMPL_NAME_MAX]; 182 }; 183 184 extern const aes_impl_ops_t aes_generic_impl; 185 #if defined(__x86_64) 186 extern const aes_impl_ops_t aes_x86_64_impl; 187 188 /* These functions are used to execute amd64 instructions for AMD or Intel: */ 189 extern ASMABI int rijndael_key_setup_enc_amd64(uint32_t rk[], 190 const uint32_t cipherKey[], int keyBits); 191 extern ASMABI int rijndael_key_setup_dec_amd64(uint32_t rk[], 192 const uint32_t cipherKey[], int keyBits); 193 extern ASMABI void aes_encrypt_amd64(const uint32_t rk[], int Nr, 194 const uint32_t pt[4], uint32_t ct[4]); 195 extern ASMABI void aes_decrypt_amd64(const uint32_t rk[], int Nr, 196 const uint32_t ct[4], uint32_t pt[4]); 197 #endif 198 #if defined(__x86_64) && defined(HAVE_AES) 199 extern const aes_impl_ops_t aes_aesni_impl; 200 #endif 201 202 /* 203 * Initializes fastest implementation 204 */ 205 void aes_impl_init(void); 206 207 /* 208 * Returns optimal allowed AES implementation 209 */ 210 const struct aes_impl_ops *aes_impl_get_ops(void); 211 212 #ifdef __cplusplus 213 } 214 #endif 215 216 #endif /* _AES_IMPL_H */ 217