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, fid) \
 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                         FW_CRYPTO_LOOKASIDE_WR_FQIDX_V(fid))
 195
 196 #define FILL_ULPTX_CMD_DEST(cid, qid) \
 197         htonl(ULPTX_CMD_V(ULP_TX_PKT) | \
 198               ULP_TXPKT_DEST_V(0) | \
 199               ULP_TXPKT_DATAMODIFY_V(0) | \
 200               ULP_TXPKT_CHANNELID_V((cid)) | \
 201               ULP_TXPKT_RO_V(1) | \
 202               ULP_TXPKT_FID_V(qid))
 203
 204 #define KEYCTX_ALIGN_PAD(bs) ({unsigned int _bs = (bs);\
 205                               _bs == SHA1_DIGEST_SIZE ? 12 : 0; })
 206
 207 #define FILL_PLD_SIZE_HASH_SIZE(payload_sgl_len, sgl_lengths, total_frags) \
 208         htonl(FW_CRYPTO_LOOKASIDE_WR_PLD_SIZE_V(payload_sgl_len ? \
 209                                                 sgl_lengths[total_frags] : 0) |\
 210               FW_CRYPTO_LOOKASIDE_WR_HASH_SIZE_V(0))
 211
 212 #define FILL_LEN_PKD(calc_tx_flits_ofld, skb) \
 213         htonl(FW_CRYPTO_LOOKASIDE_WR_LEN16_V(DIV_ROUND_UP((\
 214                                            calc_tx_flits_ofld(skb) * 8), 16)))
 215
 216 #define FILL_CMD_MORE(immdatalen) htonl(ULPTX_CMD_V(ULP_TX_SC_IMM) |\
 217                                         ULP_TX_SC_MORE_V((immdatalen) ? 0 : 1))
 218
 219 #define MAX_NK 8
 220 #define CRYPTO_MAX_IMM_TX_PKT_LEN 256
 221
 222 struct algo_param {
 223         unsigned int auth_mode;
 224         unsigned int mk_size;
 225         unsigned int result_size;
 226 };
 227
 228 struct hash_wr_param {
 229         unsigned int opad_needed;
 230         unsigned int more;
 231         unsigned int last;
 232         struct algo_param alg_prm;
 233         unsigned int sg_len;
 234         unsigned int bfr_len;
 235         u64 scmd1;
 236 };
 237
 238 enum {
 239         AES_KEYLENGTH_128BIT = 128,
 240         AES_KEYLENGTH_192BIT = 192,
 241         AES_KEYLENGTH_256BIT = 256
 242 };
 243
 244 enum {
 245         KEYLENGTH_3BYTES = 3,
 246         KEYLENGTH_4BYTES = 4,
 247         KEYLENGTH_6BYTES = 6,
 248         KEYLENGTH_8BYTES = 8
 249 };
 250
 251 enum {
 252         NUMBER_OF_ROUNDS_10 = 10,
 253         NUMBER_OF_ROUNDS_12 = 12,
 254         NUMBER_OF_ROUNDS_14 = 14,
 255 };
 256
 257 /*
 258  * CCM defines values of 4, 6, 8, 10, 12, 14, and 16 octets,
 259  * where they indicate the size of the integrity check value (ICV)
 260  */
 261 enum {
 262         ICV_4  = 4,
 263         ICV_6  = 6,
 264         ICV_8  = 8,
 265         ICV_10 = 10,
 266         ICV_12 = 12,
 267         ICV_13 = 13,
 268         ICV_14 = 14,
 269         ICV_15 = 15,
 270         ICV_16 = 16
 271 };
 272
 273 struct hash_op_params {
 274         unsigned char mk_size;
 275         unsigned char pad_align;
 276         unsigned char auth_mode;
 277         char hash_name[MAX_HASH_NAME];
 278         unsigned short block_size;
 279         unsigned short word_size;
 280         unsigned short ipad_size;
 281 };
 282
 283 struct phys_sge_pairs {
 284         __be16 len[8];
 285         __be64 addr[8];
 286 };
 287
 288 struct phys_sge_parm {
 289         unsigned int nents;
 290         unsigned int obsize;
 291         unsigned short qid;
 292         unsigned char align;
 293 };
 294
 295 struct crypto_result {
 296         struct completion completion;
 297         int err;
 298 };
 299
 300 static const u32 sha1_init[SHA1_DIGEST_SIZE / 4] = {
 301                 SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4,
 302 };
 303
 304 static const u32 sha224_init[SHA256_DIGEST_SIZE / 4] = {
 305                 SHA224_H0, SHA224_H1, SHA224_H2, SHA224_H3,
 306                 SHA224_H4, SHA224_H5, SHA224_H6, SHA224_H7,
 307 };
 308
 309 static const u32 sha256_init[SHA256_DIGEST_SIZE / 4] = {
 310                 SHA256_H0, SHA256_H1, SHA256_H2, SHA256_H3,
 311                 SHA256_H4, SHA256_H5, SHA256_H6, SHA256_H7,
 312 };
 313
 314 static const u64 sha384_init[SHA512_DIGEST_SIZE / 8] = {
 315                 SHA384_H0, SHA384_H1, SHA384_H2, SHA384_H3,
 316                 SHA384_H4, SHA384_H5, SHA384_H6, SHA384_H7,
 317 };
 318
 319 static const u64 sha512_init[SHA512_DIGEST_SIZE / 8] = {
 320                 SHA512_H0, SHA512_H1, SHA512_H2, SHA512_H3,
 321                 SHA512_H4, SHA512_H5, SHA512_H6, SHA512_H7,
 322 };
 323
 324 static inline void copy_hash_init_values(char *key, int digestsize)
 325 {
 326         u8 i;
 327         __be32 *dkey = (__be32 *)key;
 328         u64 *ldkey = (u64 *)key;
 329         __be64 *sha384 = (__be64 *)sha384_init;
 330         __be64 *sha512 = (__be64 *)sha512_init;
 331
 332         switch (digestsize) {
 333         case SHA1_DIGEST_SIZE:
 334                 for (i = 0; i < SHA1_INIT_STATE; i++)
 335                         dkey[i] = cpu_to_be32(sha1_init[i]);
 336                 break;
 337         case SHA224_DIGEST_SIZE:
 338                 for (i = 0; i < SHA224_INIT_STATE; i++)
 339                         dkey[i] = cpu_to_be32(sha224_init[i]);
 340                 break;
 341         case SHA256_DIGEST_SIZE:
 342                 for (i = 0; i < SHA256_INIT_STATE; i++)
 343                         dkey[i] = cpu_to_be32(sha256_init[i]);
 344                 break;
 345         case SHA384_DIGEST_SIZE:
 346                 for (i = 0; i < SHA384_INIT_STATE; i++)
 347                         ldkey[i] = be64_to_cpu(sha384[i]);
 348                 break;
 349         case SHA512_DIGEST_SIZE:
 350                 for (i = 0; i < SHA512_INIT_STATE; i++)
 351                         ldkey[i] = be64_to_cpu(sha512[i]);
 352                 break;
 353         }
 354 }
 355
 356 static const u8 sgl_lengths[20] = {
 357         0, 1, 2, 3, 4, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15
 358 };
 359
 360 /* Number of len fields(8) * size of one addr field */
 361 #define PHYSDSGL_MAX_LEN_SIZE 16
 362
 363 static inline u16 get_space_for_phys_dsgl(unsigned int sgl_entr)
 364 {
 365         /* len field size + addr field size */
 366         return ((sgl_entr >> 3) + ((sgl_entr % 8) ?
 367                                    1 : 0)) * PHYSDSGL_MAX_LEN_SIZE +
 368                 (sgl_entr << 3) + ((sgl_entr % 2 ? 1 : 0) << 3);
 369 }
 370
 371 /* The AES s-transform matrix (s-box). */
 372 static const u8 aes_sbox[256] = {
 373         99,  124, 119, 123, 242, 107, 111, 197, 48,  1,   103, 43,  254, 215,
 374         171, 118, 202, 130, 201, 125, 250, 89,  71,  240, 173, 212, 162, 175,
 375         156, 164, 114, 192, 183, 253, 147, 38,  54,  63,  247, 204, 52,  165,
 376         229, 241, 113, 216, 49,  21, 4,   199, 35,  195, 24,  150, 5, 154, 7,
 377         18,  128, 226, 235, 39,  178, 117, 9,   131, 44,  26,  27,  110, 90,
 378         160, 82,  59,  214, 179, 41,  227, 47,  132, 83,  209, 0,   237, 32,
 379         252, 177, 91,  106, 203, 190, 57,  74,  76,  88,  207, 208, 239, 170,
 380         251, 67,  77,  51,  133, 69,  249, 2,   127, 80,  60,  159, 168, 81,
 381         163, 64,  143, 146, 157, 56,  245, 188, 182, 218, 33,  16,  255, 243,
 382         210, 205, 12,  19,  236, 95,  151, 68,  23,  196, 167, 126, 61,  100,
 383         93,  25,  115, 96,  129, 79,  220, 34,  42,  144, 136, 70,  238, 184,
 384         20,  222, 94,  11,  219, 224, 50,  58,  10,  73,  6,   36,  92,  194,
 385         211, 172, 98,  145, 149, 228, 121, 231, 200, 55,  109, 141, 213, 78,
 386         169, 108, 86,  244, 234, 101, 122, 174, 8, 186, 120, 37,  46,  28, 166,
 387         180, 198, 232, 221, 116, 31,  75,  189, 139, 138, 112, 62,  181, 102,
 388         72,  3,   246, 14,  97,  53,  87,  185, 134, 193, 29,  158, 225, 248,
 389         152, 17,  105, 217, 142, 148, 155, 30,  135, 233, 206, 85,  40,  223,
 390         140, 161, 137, 13,  191, 230, 66,  104, 65,  153, 45,  15,  176, 84,
 391         187, 22
 392 };
 393
 394 static inline u32 aes_ks_subword(const u32 w)
 395 {
 396         u8 bytes[4];
 397
 398         *(u32 *)(&bytes[0]) = w;
 399         bytes[0] = aes_sbox[bytes[0]];
 400         bytes[1] = aes_sbox[bytes[1]];
 401         bytes[2] = aes_sbox[bytes[2]];
 402         bytes[3] = aes_sbox[bytes[3]];
 403         return *(u32 *)(&bytes[0]);
 404 }
 405
 406 static u32 round_constant[11] = {
 407         0x01000000, 0x02000000, 0x04000000, 0x08000000,
 408         0x10000000, 0x20000000, 0x40000000, 0x80000000,
 409         0x1B000000, 0x36000000, 0x6C000000
 410 };
 411
 412 #endif /* __CHCR_ALGO_H__ */