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) + AES_BLOCK_SIZE)
 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_KEY_CRX_HDR(ck_size, mk_size, d_ck, opad, ctx_len) \
 180                 htonl(TLS_KEYCTX_RXMK_SIZE_V(mk_size) | \
 181                       TLS_KEYCTX_RXCK_SIZE_V(ck_size) | \
 182                       TLS_KEYCTX_RX_VALID_V(1) | \
 183                       TLS_KEYCTX_RX_SEQCTR_V(3) | \
 184                       TLS_KEYCTX_RXAUTH_MODE_V(4) | \
 185                       TLS_KEYCTX_RXCIPH_MODE_V(2) | \
 186                       TLS_KEYCTX_RXFLIT_CNT_V((ctx_len)))
 187
 188 #define FILL_WR_OP_CCTX_SIZE \
 189                 htonl( \
 190                         FW_CRYPTO_LOOKASIDE_WR_OPCODE_V( \
 191                         FW_CRYPTO_LOOKASIDE_WR) | \
 192                         FW_CRYPTO_LOOKASIDE_WR_COMPL_V(0) | \
 193                         FW_CRYPTO_LOOKASIDE_WR_IMM_LEN_V((0)) | \
 194                         FW_CRYPTO_LOOKASIDE_WR_CCTX_LOC_V(0) | \
 195                         FW_CRYPTO_LOOKASIDE_WR_CCTX_SIZE_V(0))
 196
 197 #define FILL_WR_RX_Q_ID(cid, qid, lcb, fid) \
 198                 htonl( \
 199                         FW_CRYPTO_LOOKASIDE_WR_RX_CHID_V((cid)) | \
 200                         FW_CRYPTO_LOOKASIDE_WR_RX_Q_ID_V((qid)) | \
 201                         FW_CRYPTO_LOOKASIDE_WR_LCB_V((lcb)) | \
 202                         FW_CRYPTO_LOOKASIDE_WR_IV_V((IV_NOP)) | \
 203                         FW_CRYPTO_LOOKASIDE_WR_FQIDX_V(fid))
 204
 205 #define FILL_ULPTX_CMD_DEST(cid, qid) \
 206         htonl(ULPTX_CMD_V(ULP_TX_PKT) | \
 207               ULP_TXPKT_DEST_V(0) | \
 208               ULP_TXPKT_DATAMODIFY_V(0) | \
 209               ULP_TXPKT_CHANNELID_V((cid)) | \
 210               ULP_TXPKT_RO_V(1) | \
 211               ULP_TXPKT_FID_V(qid))
 212
 213 #define KEYCTX_ALIGN_PAD(bs) ({unsigned int _bs = (bs);\
 214                               _bs == SHA1_DIGEST_SIZE ? 12 : 0; })
 215
 216 #define FILL_PLD_SIZE_HASH_SIZE(payload_sgl_len, sgl_lengths, total_frags) \
 217         htonl(FW_CRYPTO_LOOKASIDE_WR_PLD_SIZE_V(payload_sgl_len ? \
 218                                                 sgl_lengths[total_frags] : 0) |\
 219               FW_CRYPTO_LOOKASIDE_WR_HASH_SIZE_V(0))
 220
 221 #define FILL_LEN_PKD(calc_tx_flits_ofld, skb) \
 222         htonl(FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP((\
 223                                            calc_tx_flits_ofld(skb) * 8), 16)))
 224
 225 #define FILL_CMD_MORE(immdatalen) htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) |\
 226                                         ULP_TX_SC_MORE_V((immdatalen)))
 227 #define MAX_NK 8
 228 #define MAX_DSGL_ENT                    32
 229 #define MIN_AUTH_SG                     1 /* IV */
 230 #define MIN_GCM_SG                      1 /* IV */
 231 #define MIN_DIGEST_SG                   1 /*Partial Buffer*/
 232 #define MIN_CCM_SG                      1 /*IV+B0*/
 233 #define CIP_SPACE_LEFT(len) \
 234         ((SGE_MAX_WR_LEN - CIP_WR_MIN_LEN - (len)))
 235 #define HASH_SPACE_LEFT(len) \
 236         ((SGE_MAX_WR_LEN - HASH_WR_MIN_LEN - (len)))
 237
 238 struct algo_param {
 239         unsigned int auth_mode;
 240         unsigned int mk_size;
 241         unsigned int result_size;
 242 };
 243
 244 struct hash_wr_param {
 245         struct algo_param alg_prm;
 246         unsigned int opad_needed;
 247         unsigned int more;
 248         unsigned int last;
 249         unsigned int kctx_len;
 250         unsigned int sg_len;
 251         unsigned int bfr_len;
 252         unsigned int hash_size;
 253         u64 scmd1;
 254 };
 255
 256 struct cipher_wr_param {
 257         struct skcipher_request *req;
 258         char *iv;
 259         int bytes;
 260         unsigned short qid;
 261 };
 262 enum {
 263         AES_KEYLENGTH_128BIT = 128,
 264         AES_KEYLENGTH_192BIT = 192,
 265         AES_KEYLENGTH_256BIT = 256
 266 };
 267
 268 enum {
 269         KEYLENGTH_3BYTES = 3,
 270         KEYLENGTH_4BYTES = 4,
 271         KEYLENGTH_6BYTES = 6,
 272         KEYLENGTH_8BYTES = 8
 273 };
 274
 275 enum {
 276         NUMBER_OF_ROUNDS_10 = 10,
 277         NUMBER_OF_ROUNDS_12 = 12,
 278         NUMBER_OF_ROUNDS_14 = 14,
 279 };
 280
 281 /*
 282  * CCM defines values of 4, 6, 8, 10, 12, 14, and 16 octets,
 283  * where they indicate the size of the integrity check value (ICV)
 284  */
 285 enum {
 286         ICV_4  = 4,
 287         ICV_6  = 6,
 288         ICV_8  = 8,
 289         ICV_10 = 10,
 290         ICV_12 = 12,
 291         ICV_13 = 13,
 292         ICV_14 = 14,
 293         ICV_15 = 15,
 294         ICV_16 = 16
 295 };
 296
 297 struct phys_sge_pairs {
 298         __be16 len[8];
 299         __be64 addr[8];
 300 };
 301
 302
 303 static const u32 chcr_sha1_init[SHA1_DIGEST_SIZE / 4] = {
 304                 SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4,
 305 };
 306
 307 static const u32 chcr_sha224_init[SHA256_DIGEST_SIZE / 4] = {
 308                 SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3,
 309                 SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7,
 310 };
 311
 312 static const u32 chcr_sha256_init[SHA256_DIGEST_SIZE / 4] = {
 313                 SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
 314                 SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7,
 315 };
 316
 317 static const u64 chcr_sha384_init[SHA512_DIGEST_SIZE / 8] = {
 318                 SHA384_H0, SHA384_H1, SHA384_H2, SHA384_H3,
 319                 SHA384_H4, SHA384_H5, SHA384_H6, SHA384_H7,
 320 };
 321
 322 static const u64 chcr_sha512_init[SHA512_DIGEST_SIZE / 8] = {
 323                 SHA512_H0, SHA512_H1, SHA512_H2, SHA512_H3,
 324                 SHA512_H4, SHA512_H5, SHA512_H6, SHA512_H7,
 325 };
 326
 327 static inline void copy_hash_init_values(char *key, int digestsize)
 328 {
 329         u8 i;
 330         __be32 *dkey = (__be32 *)key;
 331         u64 *ldkey = (u64 *)key;
 332         __be64 *sha384 = (__be64 *)chcr_sha384_init;
 333         __be64 *sha512 = (__be64 *)chcr_sha512_init;
 334
 335         switch (digestsize) {
 336         case SHA1_DIGEST_SIZE:
 337                 for (i = 0; i < SHA1_INIT_STATE; i++)
 338                         dkey[i] = cpu_to_be32(chcr_sha1_init[i]);
 339                 break;
 340         case SHA224_DIGEST_SIZE:
 341                 for (i = 0; i < SHA224_INIT_STATE; i++)
 342                         dkey[i] = cpu_to_be32(chcr_sha224_init[i]);
 343                 break;
 344         case SHA256_DIGEST_SIZE:
 345                 for (i = 0; i < SHA256_INIT_STATE; i++)
 346                         dkey[i] = cpu_to_be32(chcr_sha256_init[i]);
 347                 break;
 348         case SHA384_DIGEST_SIZE:
 349                 for (i = 0; i < SHA384_INIT_STATE; i++)
 350                         ldkey[i] = be64_to_cpu(sha384[i]);
 351                 break;
 352         case SHA512_DIGEST_SIZE:
 353                 for (i = 0; i < SHA512_INIT_STATE; i++)
 354                         ldkey[i] = be64_to_cpu(sha512[i]);
 355                 break;
 356         }
 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 #endif /* __CHCR_ALGO_H__ */