drivers/crypto/chelsio/chcr_algo.h

   1 /*
   2  * This file is part of the Chelsio T6 Crypto driver for Linux.
   3  *
   4  * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  *
  34  */
  35
  36 #ifndef __CHCR_ALGO_H__
  37 #define __CHCR_ALGO_H__
  38
  39 /* Crypto key context */
  40 #define KEY_CONTEXT_CTX_LEN_S           24
  41 #define KEY_CONTEXT_CTX_LEN_M           0xff
  42 #define KEY_CONTEXT_CTX_LEN_V(x)        ((x) << KEY_CONTEXT_CTX_LEN_S)
  43 #define KEY_CONTEXT_CTX_LEN_G(x) \
  44         (((x) >> KEY_CONTEXT_CTX_LEN_S) & KEY_CONTEXT_CTX_LEN_M)
  45
  46 #define KEY_CONTEXT_DUAL_CK_S      12
  47 #define KEY_CONTEXT_DUAL_CK_M      0x1
  48 #define KEY_CONTEXT_DUAL_CK_V(x)   ((x) << KEY_CONTEXT_DUAL_CK_S)
  49 #define KEY_CONTEXT_DUAL_CK_G(x)   \
  50 (((x) >> KEY_CONTEXT_DUAL_CK_S) & KEY_CONTEXT_DUAL_CK_M)
  51 #define KEY_CONTEXT_DUAL_CK_F      KEY_CONTEXT_DUAL_CK_V(1U)
  52
  53 #define KEY_CONTEXT_SALT_PRESENT_S      10
  54 #define KEY_CONTEXT_SALT_PRESENT_M      0x1
  55 #define KEY_CONTEXT_SALT_PRESENT_V(x)   ((x) << KEY_CONTEXT_SALT_PRESENT_S)
  56 #define KEY_CONTEXT_SALT_PRESENT_G(x)   \
  57         (((x) >> KEY_CONTEXT_SALT_PRESENT_S) & \
  58          KEY_CONTEXT_SALT_PRESENT_M)
  59 #define KEY_CONTEXT_SALT_PRESENT_F      KEY_CONTEXT_SALT_PRESENT_V(1U)
  60
  61 #define KEY_CONTEXT_VALID_S     0
  62 #define KEY_CONTEXT_VALID_M     0x1
  63 #define KEY_CONTEXT_VALID_V(x)  ((x) << KEY_CONTEXT_VALID_S)
  64 #define KEY_CONTEXT_VALID_G(x)  \
  65         (((x) >> KEY_CONTEXT_VALID_S) & \
  66          KEY_CONTEXT_VALID_M)
  67 #define KEY_CONTEXT_VALID_F     KEY_CONTEXT_VALID_V(1U)
  68
  69 #define KEY_CONTEXT_CK_SIZE_S           6
  70 #define KEY_CONTEXT_CK_SIZE_M           0xf
  71 #define KEY_CONTEXT_CK_SIZE_V(x)        ((x) << KEY_CONTEXT_CK_SIZE_S)
  72 #define KEY_CONTEXT_CK_SIZE_G(x)        \
  73         (((x) >> KEY_CONTEXT_CK_SIZE_S) & KEY_CONTEXT_CK_SIZE_M)
  74
  75 #define KEY_CONTEXT_MK_SIZE_S           2
  76 #define KEY_CONTEXT_MK_SIZE_M           0xf
  77 #define KEY_CONTEXT_MK_SIZE_V(x)        ((x) << KEY_CONTEXT_MK_SIZE_S)
  78 #define KEY_CONTEXT_MK_SIZE_G(x)        \
  79         (((x) >> KEY_CONTEXT_MK_SIZE_S) & KEY_CONTEXT_MK_SIZE_M)
  80
  81 #define KEY_CONTEXT_OPAD_PRESENT_S      11
  82 #define KEY_CONTEXT_OPAD_PRESENT_M      0x1
  83 #define KEY_CONTEXT_OPAD_PRESENT_V(x)   ((x) << KEY_CONTEXT_OPAD_PRESENT_S)
  84 #define KEY_CONTEXT_OPAD_PRESENT_G(x)   \
  85         (((x) >> KEY_CONTEXT_OPAD_PRESENT_S) & \
  86          KEY_CONTEXT_OPAD_PRESENT_M)
  87 #define KEY_CONTEXT_OPAD_PRESENT_F      KEY_CONTEXT_OPAD_PRESENT_V(1U)
  88
  89 #define CHCR_HASH_MAX_DIGEST_SIZE 64
  90 #define CHCR_MAX_SHA_DIGEST_SIZE 64
  91
  92 #define IPSEC_TRUNCATED_ICV_SIZE 12
  93 #define TLS_TRUNCATED_HMAC_SIZE 10
  94 #define CBCMAC_DIGEST_SIZE 16
  95 #define MAX_HASH_NAME 20
  96
  97 #define SHA1_INIT_STATE_5X4B    5
  98 #define SHA256_INIT_STATE_8X4B  8
  99 #define SHA512_INIT_STATE_8X8B  8
 100 #define SHA1_INIT_STATE         SHA1_INIT_STATE_5X4B
 101 #define SHA224_INIT_STATE       SHA256_INIT_STATE_8X4B
 102 #define SHA256_INIT_STATE       SHA256_INIT_STATE_8X4B
 103 #define SHA384_INIT_STATE       SHA512_INIT_STATE_8X8B
 104 #define SHA512_INIT_STATE       SHA512_INIT_STATE_8X8B
 105
 106 #define DUMMY_BYTES 16
 107
 108 #define IPAD_DATA 0x36363636
 109 #define OPAD_DATA 0x5c5c5c5c
 110
 111 #define TRANSHDR_SIZE(kctx_len)\
 112         (sizeof(struct chcr_wr) +\
 113          kctx_len)
 114 #define CIPHER_TRANSHDR_SIZE(kctx_len, sge_pairs) \
 115         (TRANSHDR_SIZE((kctx_len)) + (sge_pairs) +\
 116          sizeof(struct cpl_rx_phys_dsgl))
 117 #define HASH_TRANSHDR_SIZE(kctx_len)\
 118         (TRANSHDR_SIZE(kctx_len) + DUMMY_BYTES)
 119
 120
 121 #define FILL_SEC_CPL_OP_IVINSR(id, len, ofst)      \
 122         htonl( \
 123                CPL_TX_SEC_PDU_OPCODE_V(CPL_TX_SEC_PDU) | \
 124                CPL_TX_SEC_PDU_RXCHID_V((id)) | \
 125                CPL_TX_SEC_PDU_ACKFOLLOWS_V(0) | \
 126                CPL_TX_SEC_PDU_ULPTXLPBK_V(1) | \
 127                CPL_TX_SEC_PDU_CPLLEN_V((len)) | \
 128                CPL_TX_SEC_PDU_PLACEHOLDER_V(0) | \
 129                CPL_TX_SEC_PDU_IVINSRTOFST_V((ofst)))
 130
 131 #define  FILL_SEC_CPL_CIPHERSTOP_HI(a_start, a_stop, c_start, c_stop_hi) \
 132         htonl( \
 133                CPL_TX_SEC_PDU_AADSTART_V((a_start)) | \
 134                CPL_TX_SEC_PDU_AADSTOP_V((a_stop)) | \
 135                CPL_TX_SEC_PDU_CIPHERSTART_V((c_start)) | \
 136                CPL_TX_SEC_PDU_CIPHERSTOP_HI_V((c_stop_hi)))
 137
 138 #define  FILL_SEC_CPL_AUTHINSERT(c_stop_lo, a_start, a_stop, a_inst) \
 139         htonl( \
 140                CPL_TX_SEC_PDU_CIPHERSTOP_LO_V((c_stop_lo)) | \
 141                 CPL_TX_SEC_PDU_AUTHSTART_V((a_start)) | \
 142                 CPL_TX_SEC_PDU_AUTHSTOP_V((a_stop)) | \
 143                 CPL_TX_SEC_PDU_AUTHINSERT_V((a_inst)))
 144
 145 #define  FILL_SEC_CPL_SCMD0_SEQNO(ctrl, seq, cmode, amode, opad, size)  \
 146                 htonl( \
 147                 SCMD_SEQ_NO_CTRL_V(0) | \
 148                 SCMD_STATUS_PRESENT_V(0) | \
 149                 SCMD_PROTO_VERSION_V(CHCR_SCMD_PROTO_VERSION_GENERIC) | \
 150                 SCMD_ENC_DEC_CTRL_V((ctrl)) | \
 151                 SCMD_CIPH_AUTH_SEQ_CTRL_V((seq)) | \
 152                 SCMD_CIPH_MODE_V((cmode)) | \
 153                 SCMD_AUTH_MODE_V((amode)) | \
 154                 SCMD_HMAC_CTRL_V((opad)) | \
 155                 SCMD_IV_SIZE_V((size)) | \
 156                 SCMD_NUM_IVS_V(0))
 157
 158 #define FILL_SEC_CPL_IVGEN_HDRLEN(last, more, ctx_in, mac, ivdrop, len) htonl( \
 159                 SCMD_ENB_DBGID_V(0) | \
 160                 SCMD_IV_GEN_CTRL_V(0) | \
 161                 SCMD_LAST_FRAG_V((last)) | \
 162                 SCMD_MORE_FRAGS_V((more)) | \
 163                 SCMD_TLS_COMPPDU_V(0) | \
 164                 SCMD_KEY_CTX_INLINE_V((ctx_in)) | \
 165                 SCMD_TLS_FRAG_ENABLE_V(0) | \
 166                 SCMD_MAC_ONLY_V((mac)) |  \
 167                 SCMD_AADIVDROP_V((ivdrop)) | \
 168                 SCMD_HDR_LEN_V((len)))
 169
 170 #define  FILL_KEY_CTX_HDR(ck_size, mk_size, d_ck, opad, ctx_len) \
 171                 htonl(KEY_CONTEXT_VALID_V(1) | \
 172                       KEY_CONTEXT_CK_SIZE_V((ck_size)) | \
 173                       KEY_CONTEXT_MK_SIZE_V(mk_size) | \
 174                       KEY_CONTEXT_DUAL_CK_V((d_ck)) | \
 175                       KEY_CONTEXT_OPAD_PRESENT_V((opad)) | \
 176                       KEY_CONTEXT_SALT_PRESENT_V(1) | \
 177                       KEY_CONTEXT_CTX_LEN_V((ctx_len)))
 178
 179 #define FILL_WR_OP_CCTX_SIZE(len, ctx_len) \
 180                 htonl( \
 181                         FW_CRYPTO_LOOKASIDE_WR_OPCODE_V( \
 182                         FW_CRYPTO_LOOKASIDE_WR) | \
 183                         FW_CRYPTO_LOOKASIDE_WR_COMPL_V(0) | \
 184                         FW_CRYPTO_LOOKASIDE_WR_IMM_LEN_V((len)) | \
 185                         FW_CRYPTO_LOOKASIDE_WR_CCTX_LOC_V(1) | \
 186                         FW_CRYPTO_LOOKASIDE_WR_CCTX_SIZE_V((ctx_len)))
 187
 188 #define FILL_WR_RX_Q_ID(cid, qid, wr_iv) \
 189                 htonl( \
 190                         FW_CRYPTO_LOOKASIDE_WR_RX_CHID_V((cid)) | \
 191                         FW_CRYPTO_LOOKASIDE_WR_RX_Q_ID_V((qid)) | \
 192                         FW_CRYPTO_LOOKASIDE_WR_LCB_V(0) | \
 193                         FW_CRYPTO_LOOKASIDE_WR_IV_V((wr_iv)))
 194
 195 #define FILL_ULPTX_CMD_DEST(cid) \
 196         htonl(ULPTX_CMD_V(ULP_TX_PKT) | \
 197               ULP_TXPKT_DEST_V(0) | \
 198               ULP_TXPKT_DATAMODIFY_V(0) | \
 199               ULP_TXPKT_CHANNELID_V((cid)) | \
 200               ULP_TXPKT_RO_V(1) | \
 201               ULP_TXPKT_FID_V(0))
 202
 203 #define KEYCTX_ALIGN_PAD(bs) ({unsigned int _bs = (bs);\
 204                               _bs == SHA1_DIGEST_SIZE ? 12 : 0; })
 205
 206 #define FILL_PLD_SIZE_HASH_SIZE(payload_sgl_len, sgl_lengths, total_frags) \
 207         htonl(FW_CRYPTO_LOOKASIDE_WR_PLD_SIZE_V(payload_sgl_len ? \
 208                                                 sgl_lengths[total_frags] : 0) |\
 209               FW_CRYPTO_LOOKASIDE_WR_HASH_SIZE_V(0))
 210
 211 #define FILL_LEN_PKD(calc_tx_flits_ofld, skb) \
 212         htonl(FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP((\
 213                                            calc_tx_flits_ofld(skb) * 8), 16)))
 214
 215 #define FILL_CMD_MORE(immdatalen) htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) |\
 216                                         ULP_TX_SC_MORE_V((immdatalen) ? 0 : 1))
 217
 218 #define MAX_NK 8
 219 #define CRYPTO_MAX_IMM_TX_PKT_LEN 256
 220
 221 struct algo_param {
 222         unsigned int auth_mode;
 223         unsigned int mk_size;
 224         unsigned int result_size;
 225 };
 226
 227 struct hash_wr_param {
 228         unsigned int opad_needed;
 229         unsigned int more;
 230         unsigned int last;
 231         struct algo_param alg_prm;
 232         unsigned int sg_len;
 233         unsigned int bfr_len;
 234         u64 scmd1;
 235 };
 236
 237 enum {
 238         AES_KEYLENGTH_128BIT = 128,
 239         AES_KEYLENGTH_192BIT = 192,
 240         AES_KEYLENGTH_256BIT = 256
 241 };
 242
 243 enum {
 244         KEYLENGTH_3BYTES = 3,
 245         KEYLENGTH_4BYTES = 4,
 246         KEYLENGTH_6BYTES = 6,
 247         KEYLENGTH_8BYTES = 8
 248 };
 249
 250 enum {
 251         NUMBER_OF_ROUNDS_10 = 10,
 252         NUMBER_OF_ROUNDS_12 = 12,
 253         NUMBER_OF_ROUNDS_14 = 14,
 254 };
 255
 256 /*
 257  * CCM defines values of 4, 6, 8, 10, 12, 14, and 16 octets,
 258  * where they indicate the size of the integrity check value (ICV)
 259  */
 260 enum {
 261         ICV_4  = 4,
 262         ICV_6  = 6,
 263         ICV_8  = 8,
 264         ICV_10 = 10,
 265         ICV_12 = 12,
 266         ICV_13 = 13,
 267         ICV_14 = 14,
 268         ICV_15 = 15,
 269         ICV_16 = 16
 270 };
 271
 272 struct hash_op_params {
 273         unsigned char mk_size;
 274         unsigned char pad_align;
 275         unsigned char auth_mode;
 276         char hash_name[MAX_HASH_NAME];
 277         unsigned short block_size;
 278         unsigned short word_size;
 279         unsigned short ipad_size;
 280 };
 281
 282 struct phys_sge_pairs {
 283         __be16 len[8];
 284         __be64 addr[8];
 285 };
 286
 287 struct phys_sge_parm {
 288         unsigned int nents;
 289         unsigned int obsize;
 290         unsigned short qid;
 291         unsigned char align;
 292 };
 293
 294 struct crypto_result {
 295         struct completion completion;
 296         int err;
 297 };
 298
 299 static const u32 sha1_init[SHA1_DIGEST_SIZE / 4] = {
 300                 SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4,
 301 };
 302
 303 static const u32 sha224_init[SHA256_DIGEST_SIZE / 4] = {
 304                 SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3,
 305                 SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7,
 306 };
 307
 308 static const u32 sha256_init[SHA256_DIGEST_SIZE / 4] = {
 309                 SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
 310                 SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7,
 311 };
 312
 313 static const u64 sha384_init[SHA512_DIGEST_SIZE / 8] = {
 314                 SHA384_H0, SHA384_H1, SHA384_H2, SHA384_H3,
 315                 SHA384_H4, SHA384_H5, SHA384_H6, SHA384_H7,
 316 };
 317
 318 static const u64 sha512_init[SHA512_DIGEST_SIZE / 8] = {
 319                 SHA512_H0, SHA512_H1, SHA512_H2, SHA512_H3,
 320                 SHA512_H4, SHA512_H5, SHA512_H6, SHA512_H7,
 321 };
 322
 323 static inline void copy_hash_init_values(char *key, int digestsize)
 324 {
 325         u8 i;
 326         __be32 *dkey = (__be32 *)key;
 327         u64 *ldkey = (u64 *)key;
 328         __be64 *sha384 = (__be64 *)sha384_init;
 329         __be64 *sha512 = (__be64 *)sha512_init;
 330
 331         switch (digestsize) {
 332         case SHA1_DIGEST_SIZE:
 333                 for (i = 0; i < SHA1_INIT_STATE; i++)
 334                         dkey[i] = cpu_to_be32(sha1_init[i]);
 335                 break;
 336         case SHA224_DIGEST_SIZE:
 337                 for (i = 0; i < SHA224_INIT_STATE; i++)
 338                         dkey[i] = cpu_to_be32(sha224_init[i]);
 339                 break;
 340         case SHA256_DIGEST_SIZE:
 341                 for (i = 0; i < SHA256_INIT_STATE; i++)
 342                         dkey[i] = cpu_to_be32(sha256_init[i]);
 343                 break;
 344         case SHA384_DIGEST_SIZE:
 345                 for (i = 0; i < SHA384_INIT_STATE; i++)
 346                         ldkey[i] = be64_to_cpu(sha384[i]);
 347                 break;
 348         case SHA512_DIGEST_SIZE:
 349                 for (i = 0; i < SHA512_INIT_STATE; i++)
 350                         ldkey[i] = be64_to_cpu(sha512[i]);
 351                 break;
 352         }
 353 }
 354
 355 static const u8 sgl_lengths[20] = {
 356         0, 1, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15
 357 };
 358
 359 /* Number of len fields(8) * size of one addr field */
 360 #define PHYSDSGL_MAX_LEN_SIZE 16
 361
 362 static inline u16 get_space_for_phys_dsgl(unsigned int sgl_entr)
 363 {
 364         /* len field size + addr field size */
 365         return ((sgl_entr >> 3) + ((sgl_entr % 8) ?
 366                                    1 : 0)) * PHYSDSGL_MAX_LEN_SIZE +
 367                 (sgl_entr << 3) + ((sgl_entr % 2 ? 1 : 0) << 3);
 368 }
 369
 370 /* The AES s-transform matrix (s-box). */
 371 static const u8 aes_sbox[256] = {
 372         99,  124, 119, 123, 242, 107, 111, 197, 48,  1,   103, 43,  254, 215,
 373         171, 118, 202, 130, 201, 125, 250, 89,  71,  240, 173, 212, 162, 175,
 374         156, 164, 114, 192, 183, 253, 147, 38,  54,  63,  247, 204, 52,  165,
 375         229, 241, 113, 216, 49,  21, 4,   199, 35,  195, 24,  150, 5, 154, 7,
 376         18,  128, 226, 235, 39,  178, 117, 9,   131, 44,  26,  27,  110, 90,
 377         160, 82,  59,  214, 179, 41,  227, 47,  132, 83,  209, 0,   237, 32,
 378         252, 177, 91,  106, 203, 190, 57,  74,  76,  88,  207, 208, 239, 170,
 379         251, 67,  77,  51,  133, 69,  249, 2,   127, 80,  60,  159, 168, 81,
 380         163, 64,  143, 146, 157, 56,  245, 188, 182, 218, 33,  16,  255, 243,
 381         210, 205, 12,  19,  236, 95,  151, 68,  23,  196, 167, 126, 61,  100,
 382         93,  25,  115, 96,  129, 79,  220, 34,  42,  144, 136, 70,  238, 184,
 383         20,  222, 94,  11,  219, 224, 50,  58,  10,  73,  6,   36,  92,  194,
 384         211, 172, 98,  145, 149, 228, 121, 231, 200, 55,  109, 141, 213, 78,
 385         169, 108, 86,  244, 234, 101, 122, 174, 8, 186, 120, 37,  46,  28, 166,
 386         180, 198, 232, 221, 116, 31,  75,  189, 139, 138, 112, 62,  181, 102,
 387         72,  3,   246, 14,  97,  53,  87,  185, 134, 193, 29,  158, 225, 248,
 388         152, 17,  105, 217, 142, 148, 155, 30,  135, 233, 206, 85,  40,  223,
 389         140, 161, 137, 13,  191, 230, 66,  104, 65,  153, 45,  15,  176, 84,
 390         187, 22
 391 };
 392
 393 static inline u32 aes_ks_subword(const u32 w)
 394 {
 395         u8 bytes[4];
 396
 397         *(u32 *)(&bytes[0]) = w;
 398         bytes[0] = aes_sbox[bytes[0]];
 399         bytes[1] = aes_sbox[bytes[1]];
 400         bytes[2] = aes_sbox[bytes[2]];
 401         bytes[3] = aes_sbox[bytes[3]];
 402         return *(u32 *)(&bytes[0]);
 403 }
 404
 405 static u32 round_constant[11] = {
 406         0x01000000, 0x02000000, 0x04000000, 0x08000000,
 407         0x10000000, 0x20000000, 0x40000000, 0x80000000,
 408         0x1B000000, 0x36000000, 0x6C000000
 409 };
 410
 411 #endif /* __CHCR_ALGO_H__ */