Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Intel IXP4xx NPE-C crypto driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Christian Hohnstaedt <chohnstaedt@innominate.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of version 2 of the GNU General Public License |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/platform_device.h> |
| 13 | #include <linux/dma-mapping.h> |
| 14 | #include <linux/dmapool.h> |
| 15 | #include <linux/crypto.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/rtnetlink.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/spinlock.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/gfp.h> |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 21 | |
| 22 | #include <crypto/ctr.h> |
| 23 | #include <crypto/des.h> |
| 24 | #include <crypto/aes.h> |
| 25 | #include <crypto/sha.h> |
| 26 | #include <crypto/algapi.h> |
| 27 | #include <crypto/aead.h> |
| 28 | #include <crypto/authenc.h> |
| 29 | #include <crypto/scatterwalk.h> |
| 30 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 31 | #include <mach/npe.h> |
| 32 | #include <mach/qmgr.h> |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 33 | |
| 34 | #define MAX_KEYLEN 32 |
| 35 | |
| 36 | /* hash: cfgword + 2 * digestlen; crypt: keylen + cfgword */ |
| 37 | #define NPE_CTX_LEN 80 |
| 38 | #define AES_BLOCK128 16 |
| 39 | |
| 40 | #define NPE_OP_HASH_VERIFY 0x01 |
| 41 | #define NPE_OP_CCM_ENABLE 0x04 |
| 42 | #define NPE_OP_CRYPT_ENABLE 0x08 |
| 43 | #define NPE_OP_HASH_ENABLE 0x10 |
| 44 | #define NPE_OP_NOT_IN_PLACE 0x20 |
| 45 | #define NPE_OP_HMAC_DISABLE 0x40 |
| 46 | #define NPE_OP_CRYPT_ENCRYPT 0x80 |
| 47 | |
| 48 | #define NPE_OP_CCM_GEN_MIC 0xcc |
| 49 | #define NPE_OP_HASH_GEN_ICV 0x50 |
| 50 | #define NPE_OP_ENC_GEN_KEY 0xc9 |
| 51 | |
| 52 | #define MOD_ECB 0x0000 |
| 53 | #define MOD_CTR 0x1000 |
| 54 | #define MOD_CBC_ENC 0x2000 |
| 55 | #define MOD_CBC_DEC 0x3000 |
| 56 | #define MOD_CCM_ENC 0x4000 |
| 57 | #define MOD_CCM_DEC 0x5000 |
| 58 | |
| 59 | #define KEYLEN_128 4 |
| 60 | #define KEYLEN_192 6 |
| 61 | #define KEYLEN_256 8 |
| 62 | |
| 63 | #define CIPH_DECR 0x0000 |
| 64 | #define CIPH_ENCR 0x0400 |
| 65 | |
| 66 | #define MOD_DES 0x0000 |
| 67 | #define MOD_TDEA2 0x0100 |
| 68 | #define MOD_3DES 0x0200 |
| 69 | #define MOD_AES 0x0800 |
| 70 | #define MOD_AES128 (0x0800 | KEYLEN_128) |
| 71 | #define MOD_AES192 (0x0900 | KEYLEN_192) |
| 72 | #define MOD_AES256 (0x0a00 | KEYLEN_256) |
| 73 | |
| 74 | #define MAX_IVLEN 16 |
| 75 | #define NPE_ID 2 /* NPE C */ |
| 76 | #define NPE_QLEN 16 |
| 77 | /* Space for registering when the first |
| 78 | * NPE_QLEN crypt_ctl are busy */ |
| 79 | #define NPE_QLEN_TOTAL 64 |
| 80 | |
| 81 | #define SEND_QID 29 |
| 82 | #define RECV_QID 30 |
| 83 | |
| 84 | #define CTL_FLAG_UNUSED 0x0000 |
| 85 | #define CTL_FLAG_USED 0x1000 |
| 86 | #define CTL_FLAG_PERFORM_ABLK 0x0001 |
| 87 | #define CTL_FLAG_GEN_ICV 0x0002 |
| 88 | #define CTL_FLAG_GEN_REVAES 0x0004 |
| 89 | #define CTL_FLAG_PERFORM_AEAD 0x0008 |
| 90 | #define CTL_FLAG_MASK 0x000f |
| 91 | |
| 92 | #define HMAC_IPAD_VALUE 0x36 |
| 93 | #define HMAC_OPAD_VALUE 0x5C |
| 94 | #define HMAC_PAD_BLOCKLEN SHA1_BLOCK_SIZE |
| 95 | |
| 96 | #define MD5_DIGEST_SIZE 16 |
| 97 | |
| 98 | struct buffer_desc { |
| 99 | u32 phys_next; |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 100 | #ifdef __ARMEB__ |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 101 | u16 buf_len; |
| 102 | u16 pkt_len; |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 103 | #else |
| 104 | u16 pkt_len; |
| 105 | u16 buf_len; |
| 106 | #endif |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 107 | u32 phys_addr; |
| 108 | u32 __reserved[4]; |
| 109 | struct buffer_desc *next; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 110 | enum dma_data_direction dir; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | struct crypt_ctl { |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 114 | #ifdef __ARMEB__ |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 115 | u8 mode; /* NPE_OP_* operation mode */ |
| 116 | u8 init_len; |
| 117 | u16 reserved; |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 118 | #else |
| 119 | u16 reserved; |
| 120 | u8 init_len; |
| 121 | u8 mode; /* NPE_OP_* operation mode */ |
| 122 | #endif |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 123 | u8 iv[MAX_IVLEN]; /* IV for CBC mode or CTR IV for CTR mode */ |
| 124 | u32 icv_rev_aes; /* icv or rev aes */ |
| 125 | u32 src_buf; |
| 126 | u32 dst_buf; |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 127 | #ifdef __ARMEB__ |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 128 | u16 auth_offs; /* Authentication start offset */ |
| 129 | u16 auth_len; /* Authentication data length */ |
| 130 | u16 crypt_offs; /* Cryption start offset */ |
| 131 | u16 crypt_len; /* Cryption data length */ |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 132 | #else |
| 133 | u16 auth_len; /* Authentication data length */ |
| 134 | u16 auth_offs; /* Authentication start offset */ |
| 135 | u16 crypt_len; /* Cryption data length */ |
| 136 | u16 crypt_offs; /* Cryption start offset */ |
| 137 | #endif |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 138 | u32 aadAddr; /* Additional Auth Data Addr for CCM mode */ |
| 139 | u32 crypto_ctx; /* NPE Crypto Param structure address */ |
| 140 | |
| 141 | /* Used by Host: 4*4 bytes*/ |
| 142 | unsigned ctl_flags; |
| 143 | union { |
| 144 | struct ablkcipher_request *ablk_req; |
| 145 | struct aead_request *aead_req; |
| 146 | struct crypto_tfm *tfm; |
| 147 | } data; |
| 148 | struct buffer_desc *regist_buf; |
| 149 | u8 *regist_ptr; |
| 150 | }; |
| 151 | |
| 152 | struct ablk_ctx { |
| 153 | struct buffer_desc *src; |
| 154 | struct buffer_desc *dst; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 155 | }; |
| 156 | |
| 157 | struct aead_ctx { |
| 158 | struct buffer_desc *buffer; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 159 | struct scatterlist ivlist; |
| 160 | /* used when the hmac is not on one sg entry */ |
| 161 | u8 *hmac_virt; |
| 162 | int encrypt; |
| 163 | }; |
| 164 | |
| 165 | struct ix_hash_algo { |
| 166 | u32 cfgword; |
| 167 | unsigned char *icv; |
| 168 | }; |
| 169 | |
| 170 | struct ix_sa_dir { |
| 171 | unsigned char *npe_ctx; |
| 172 | dma_addr_t npe_ctx_phys; |
| 173 | int npe_ctx_idx; |
| 174 | u8 npe_mode; |
| 175 | }; |
| 176 | |
| 177 | struct ixp_ctx { |
| 178 | struct ix_sa_dir encrypt; |
| 179 | struct ix_sa_dir decrypt; |
| 180 | int authkey_len; |
| 181 | u8 authkey[MAX_KEYLEN]; |
| 182 | int enckey_len; |
| 183 | u8 enckey[MAX_KEYLEN]; |
| 184 | u8 salt[MAX_IVLEN]; |
| 185 | u8 nonce[CTR_RFC3686_NONCE_SIZE]; |
| 186 | unsigned salted; |
| 187 | atomic_t configuring; |
| 188 | struct completion completion; |
| 189 | }; |
| 190 | |
| 191 | struct ixp_alg { |
| 192 | struct crypto_alg crypto; |
| 193 | const struct ix_hash_algo *hash; |
| 194 | u32 cfg_enc; |
| 195 | u32 cfg_dec; |
| 196 | |
| 197 | int registered; |
| 198 | }; |
| 199 | |
| 200 | static const struct ix_hash_algo hash_alg_md5 = { |
| 201 | .cfgword = 0xAA010004, |
| 202 | .icv = "\x01\x23\x45\x67\x89\xAB\xCD\xEF" |
| 203 | "\xFE\xDC\xBA\x98\x76\x54\x32\x10", |
| 204 | }; |
| 205 | static const struct ix_hash_algo hash_alg_sha1 = { |
| 206 | .cfgword = 0x00000005, |
| 207 | .icv = "\x67\x45\x23\x01\xEF\xCD\xAB\x89\x98\xBA" |
| 208 | "\xDC\xFE\x10\x32\x54\x76\xC3\xD2\xE1\xF0", |
| 209 | }; |
| 210 | |
| 211 | static struct npe *npe_c; |
| 212 | static struct dma_pool *buffer_pool = NULL; |
| 213 | static struct dma_pool *ctx_pool = NULL; |
| 214 | |
| 215 | static struct crypt_ctl *crypt_virt = NULL; |
| 216 | static dma_addr_t crypt_phys; |
| 217 | |
| 218 | static int support_aes = 1; |
| 219 | |
| 220 | static void dev_release(struct device *dev) |
| 221 | { |
| 222 | return; |
| 223 | } |
| 224 | |
| 225 | #define DRIVER_NAME "ixp4xx_crypto" |
| 226 | static struct platform_device pseudo_dev = { |
| 227 | .name = DRIVER_NAME, |
| 228 | .id = 0, |
| 229 | .num_resources = 0, |
| 230 | .dev = { |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 231 | .coherent_dma_mask = DMA_BIT_MASK(32), |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 232 | .release = dev_release, |
| 233 | } |
| 234 | }; |
| 235 | |
| 236 | static struct device *dev = &pseudo_dev.dev; |
| 237 | |
| 238 | static inline dma_addr_t crypt_virt2phys(struct crypt_ctl *virt) |
| 239 | { |
| 240 | return crypt_phys + (virt - crypt_virt) * sizeof(struct crypt_ctl); |
| 241 | } |
| 242 | |
| 243 | static inline struct crypt_ctl *crypt_phys2virt(dma_addr_t phys) |
| 244 | { |
| 245 | return crypt_virt + (phys - crypt_phys) / sizeof(struct crypt_ctl); |
| 246 | } |
| 247 | |
| 248 | static inline u32 cipher_cfg_enc(struct crypto_tfm *tfm) |
| 249 | { |
| 250 | return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_enc; |
| 251 | } |
| 252 | |
| 253 | static inline u32 cipher_cfg_dec(struct crypto_tfm *tfm) |
| 254 | { |
| 255 | return container_of(tfm->__crt_alg, struct ixp_alg,crypto)->cfg_dec; |
| 256 | } |
| 257 | |
| 258 | static inline const struct ix_hash_algo *ix_hash(struct crypto_tfm *tfm) |
| 259 | { |
| 260 | return container_of(tfm->__crt_alg, struct ixp_alg, crypto)->hash; |
| 261 | } |
| 262 | |
| 263 | static int setup_crypt_desc(void) |
| 264 | { |
| 265 | BUILD_BUG_ON(sizeof(struct crypt_ctl) != 64); |
| 266 | crypt_virt = dma_alloc_coherent(dev, |
| 267 | NPE_QLEN * sizeof(struct crypt_ctl), |
Julia Lawall | e7a2577 | 2012-01-09 10:40:49 +0100 | [diff] [blame] | 268 | &crypt_phys, GFP_ATOMIC); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 269 | if (!crypt_virt) |
| 270 | return -ENOMEM; |
| 271 | memset(crypt_virt, 0, NPE_QLEN * sizeof(struct crypt_ctl)); |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | static spinlock_t desc_lock; |
| 276 | static struct crypt_ctl *get_crypt_desc(void) |
| 277 | { |
| 278 | int i; |
| 279 | static int idx = 0; |
| 280 | unsigned long flags; |
| 281 | |
| 282 | spin_lock_irqsave(&desc_lock, flags); |
| 283 | |
| 284 | if (unlikely(!crypt_virt)) |
| 285 | setup_crypt_desc(); |
| 286 | if (unlikely(!crypt_virt)) { |
| 287 | spin_unlock_irqrestore(&desc_lock, flags); |
| 288 | return NULL; |
| 289 | } |
| 290 | i = idx; |
| 291 | if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) { |
| 292 | if (++idx >= NPE_QLEN) |
| 293 | idx = 0; |
| 294 | crypt_virt[i].ctl_flags = CTL_FLAG_USED; |
| 295 | spin_unlock_irqrestore(&desc_lock, flags); |
| 296 | return crypt_virt +i; |
| 297 | } else { |
| 298 | spin_unlock_irqrestore(&desc_lock, flags); |
| 299 | return NULL; |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | static spinlock_t emerg_lock; |
| 304 | static struct crypt_ctl *get_crypt_desc_emerg(void) |
| 305 | { |
| 306 | int i; |
| 307 | static int idx = NPE_QLEN; |
| 308 | struct crypt_ctl *desc; |
| 309 | unsigned long flags; |
| 310 | |
| 311 | desc = get_crypt_desc(); |
| 312 | if (desc) |
| 313 | return desc; |
| 314 | if (unlikely(!crypt_virt)) |
| 315 | return NULL; |
| 316 | |
| 317 | spin_lock_irqsave(&emerg_lock, flags); |
| 318 | i = idx; |
| 319 | if (crypt_virt[i].ctl_flags == CTL_FLAG_UNUSED) { |
| 320 | if (++idx >= NPE_QLEN_TOTAL) |
| 321 | idx = NPE_QLEN; |
| 322 | crypt_virt[i].ctl_flags = CTL_FLAG_USED; |
| 323 | spin_unlock_irqrestore(&emerg_lock, flags); |
| 324 | return crypt_virt +i; |
| 325 | } else { |
| 326 | spin_unlock_irqrestore(&emerg_lock, flags); |
| 327 | return NULL; |
| 328 | } |
| 329 | } |
| 330 | |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 331 | static void free_buf_chain(struct device *dev, struct buffer_desc *buf,u32 phys) |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 332 | { |
| 333 | while (buf) { |
| 334 | struct buffer_desc *buf1; |
| 335 | u32 phys1; |
| 336 | |
| 337 | buf1 = buf->next; |
| 338 | phys1 = buf->phys_next; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 339 | dma_unmap_single(dev, buf->phys_next, buf->buf_len, buf->dir); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 340 | dma_pool_free(buffer_pool, buf, phys); |
| 341 | buf = buf1; |
| 342 | phys = phys1; |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | static struct tasklet_struct crypto_done_tasklet; |
| 347 | |
| 348 | static void finish_scattered_hmac(struct crypt_ctl *crypt) |
| 349 | { |
| 350 | struct aead_request *req = crypt->data.aead_req; |
| 351 | struct aead_ctx *req_ctx = aead_request_ctx(req); |
| 352 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| 353 | int authsize = crypto_aead_authsize(tfm); |
| 354 | int decryptlen = req->cryptlen - authsize; |
| 355 | |
| 356 | if (req_ctx->encrypt) { |
| 357 | scatterwalk_map_and_copy(req_ctx->hmac_virt, |
| 358 | req->src, decryptlen, authsize, 1); |
| 359 | } |
| 360 | dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes); |
| 361 | } |
| 362 | |
| 363 | static void one_packet(dma_addr_t phys) |
| 364 | { |
| 365 | struct crypt_ctl *crypt; |
| 366 | struct ixp_ctx *ctx; |
| 367 | int failed; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 368 | |
| 369 | failed = phys & 0x1 ? -EBADMSG : 0; |
| 370 | phys &= ~0x3; |
| 371 | crypt = crypt_phys2virt(phys); |
| 372 | |
| 373 | switch (crypt->ctl_flags & CTL_FLAG_MASK) { |
| 374 | case CTL_FLAG_PERFORM_AEAD: { |
| 375 | struct aead_request *req = crypt->data.aead_req; |
| 376 | struct aead_ctx *req_ctx = aead_request_ctx(req); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 377 | |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 378 | free_buf_chain(dev, req_ctx->buffer, crypt->src_buf); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 379 | if (req_ctx->hmac_virt) { |
| 380 | finish_scattered_hmac(crypt); |
| 381 | } |
| 382 | req->base.complete(&req->base, failed); |
| 383 | break; |
| 384 | } |
| 385 | case CTL_FLAG_PERFORM_ABLK: { |
| 386 | struct ablkcipher_request *req = crypt->data.ablk_req; |
| 387 | struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req); |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 388 | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 389 | if (req_ctx->dst) { |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 390 | free_buf_chain(dev, req_ctx->dst, crypt->dst_buf); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 391 | } |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 392 | free_buf_chain(dev, req_ctx->src, crypt->src_buf); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 393 | req->base.complete(&req->base, failed); |
| 394 | break; |
| 395 | } |
| 396 | case CTL_FLAG_GEN_ICV: |
| 397 | ctx = crypto_tfm_ctx(crypt->data.tfm); |
| 398 | dma_pool_free(ctx_pool, crypt->regist_ptr, |
| 399 | crypt->regist_buf->phys_addr); |
| 400 | dma_pool_free(buffer_pool, crypt->regist_buf, crypt->src_buf); |
| 401 | if (atomic_dec_and_test(&ctx->configuring)) |
| 402 | complete(&ctx->completion); |
| 403 | break; |
| 404 | case CTL_FLAG_GEN_REVAES: |
| 405 | ctx = crypto_tfm_ctx(crypt->data.tfm); |
| 406 | *(u32*)ctx->decrypt.npe_ctx &= cpu_to_be32(~CIPH_ENCR); |
| 407 | if (atomic_dec_and_test(&ctx->configuring)) |
| 408 | complete(&ctx->completion); |
| 409 | break; |
| 410 | default: |
| 411 | BUG(); |
| 412 | } |
| 413 | crypt->ctl_flags = CTL_FLAG_UNUSED; |
| 414 | } |
| 415 | |
| 416 | static void irqhandler(void *_unused) |
| 417 | { |
| 418 | tasklet_schedule(&crypto_done_tasklet); |
| 419 | } |
| 420 | |
| 421 | static void crypto_done_action(unsigned long arg) |
| 422 | { |
| 423 | int i; |
| 424 | |
| 425 | for(i=0; i<4; i++) { |
| 426 | dma_addr_t phys = qmgr_get_entry(RECV_QID); |
| 427 | if (!phys) |
| 428 | return; |
| 429 | one_packet(phys); |
| 430 | } |
| 431 | tasklet_schedule(&crypto_done_tasklet); |
| 432 | } |
| 433 | |
| 434 | static int init_ixp_crypto(void) |
| 435 | { |
| 436 | int ret = -ENODEV; |
Christian Hohnstaedt | 295c01f | 2009-04-12 13:01:44 +0800 | [diff] [blame] | 437 | u32 msg[2] = { 0, 0 }; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 438 | |
| 439 | if (! ( ~(*IXP4XX_EXP_CFG2) & (IXP4XX_FEATURE_HASH | |
| 440 | IXP4XX_FEATURE_AES | IXP4XX_FEATURE_DES))) { |
| 441 | printk(KERN_ERR "ixp_crypto: No HW crypto available\n"); |
| 442 | return ret; |
| 443 | } |
| 444 | npe_c = npe_request(NPE_ID); |
| 445 | if (!npe_c) |
| 446 | return ret; |
| 447 | |
| 448 | if (!npe_running(npe_c)) { |
Christian Hohnstaedt | 295c01f | 2009-04-12 13:01:44 +0800 | [diff] [blame] | 449 | ret = npe_load_firmware(npe_c, npe_name(npe_c), dev); |
| 450 | if (ret) { |
| 451 | return ret; |
| 452 | } |
| 453 | if (npe_recv_message(npe_c, msg, "STATUS_MSG")) |
| 454 | goto npe_error; |
| 455 | } else { |
| 456 | if (npe_send_message(npe_c, msg, "STATUS_MSG")) |
| 457 | goto npe_error; |
| 458 | |
| 459 | if (npe_recv_message(npe_c, msg, "STATUS_MSG")) |
| 460 | goto npe_error; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 461 | } |
| 462 | |
Christian Hohnstaedt | 295c01f | 2009-04-12 13:01:44 +0800 | [diff] [blame] | 463 | switch ((msg[1]>>16) & 0xff) { |
| 464 | case 3: |
| 465 | printk(KERN_WARNING "Firmware of %s lacks AES support\n", |
| 466 | npe_name(npe_c)); |
| 467 | support_aes = 0; |
| 468 | break; |
| 469 | case 4: |
| 470 | case 5: |
| 471 | support_aes = 1; |
| 472 | break; |
| 473 | default: |
| 474 | printk(KERN_ERR "Firmware of %s lacks crypto support\n", |
| 475 | npe_name(npe_c)); |
| 476 | return -ENODEV; |
| 477 | } |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 478 | /* buffer_pool will also be used to sometimes store the hmac, |
| 479 | * so assure it is large enough |
| 480 | */ |
| 481 | BUILD_BUG_ON(SHA1_DIGEST_SIZE > sizeof(struct buffer_desc)); |
| 482 | buffer_pool = dma_pool_create("buffer", dev, |
| 483 | sizeof(struct buffer_desc), 32, 0); |
| 484 | ret = -ENOMEM; |
| 485 | if (!buffer_pool) { |
| 486 | goto err; |
| 487 | } |
| 488 | ctx_pool = dma_pool_create("context", dev, |
| 489 | NPE_CTX_LEN, 16, 0); |
| 490 | if (!ctx_pool) { |
| 491 | goto err; |
| 492 | } |
Krzysztof Hałasa | 1777f1a | 2009-03-04 08:01:22 +0800 | [diff] [blame] | 493 | ret = qmgr_request_queue(SEND_QID, NPE_QLEN_TOTAL, 0, 0, |
| 494 | "ixp_crypto:out", NULL); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 495 | if (ret) |
| 496 | goto err; |
Krzysztof Hałasa | 1777f1a | 2009-03-04 08:01:22 +0800 | [diff] [blame] | 497 | ret = qmgr_request_queue(RECV_QID, NPE_QLEN, 0, 0, |
| 498 | "ixp_crypto:in", NULL); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 499 | if (ret) { |
| 500 | qmgr_release_queue(SEND_QID); |
| 501 | goto err; |
| 502 | } |
| 503 | qmgr_set_irq(RECV_QID, QUEUE_IRQ_SRC_NOT_EMPTY, irqhandler, NULL); |
| 504 | tasklet_init(&crypto_done_tasklet, crypto_done_action, 0); |
| 505 | |
| 506 | qmgr_enable_irq(RECV_QID); |
| 507 | return 0; |
Christian Hohnstaedt | 295c01f | 2009-04-12 13:01:44 +0800 | [diff] [blame] | 508 | |
| 509 | npe_error: |
| 510 | printk(KERN_ERR "%s not responding\n", npe_name(npe_c)); |
| 511 | ret = -EIO; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 512 | err: |
| 513 | if (ctx_pool) |
| 514 | dma_pool_destroy(ctx_pool); |
| 515 | if (buffer_pool) |
| 516 | dma_pool_destroy(buffer_pool); |
| 517 | npe_release(npe_c); |
| 518 | return ret; |
| 519 | } |
| 520 | |
| 521 | static void release_ixp_crypto(void) |
| 522 | { |
| 523 | qmgr_disable_irq(RECV_QID); |
| 524 | tasklet_kill(&crypto_done_tasklet); |
| 525 | |
| 526 | qmgr_release_queue(SEND_QID); |
| 527 | qmgr_release_queue(RECV_QID); |
| 528 | |
| 529 | dma_pool_destroy(ctx_pool); |
| 530 | dma_pool_destroy(buffer_pool); |
| 531 | |
| 532 | npe_release(npe_c); |
| 533 | |
| 534 | if (crypt_virt) { |
| 535 | dma_free_coherent(dev, |
| 536 | NPE_QLEN_TOTAL * sizeof( struct crypt_ctl), |
| 537 | crypt_virt, crypt_phys); |
| 538 | } |
| 539 | return; |
| 540 | } |
| 541 | |
| 542 | static void reset_sa_dir(struct ix_sa_dir *dir) |
| 543 | { |
| 544 | memset(dir->npe_ctx, 0, NPE_CTX_LEN); |
| 545 | dir->npe_ctx_idx = 0; |
| 546 | dir->npe_mode = 0; |
| 547 | } |
| 548 | |
| 549 | static int init_sa_dir(struct ix_sa_dir *dir) |
| 550 | { |
| 551 | dir->npe_ctx = dma_pool_alloc(ctx_pool, GFP_KERNEL, &dir->npe_ctx_phys); |
| 552 | if (!dir->npe_ctx) { |
| 553 | return -ENOMEM; |
| 554 | } |
| 555 | reset_sa_dir(dir); |
| 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static void free_sa_dir(struct ix_sa_dir *dir) |
| 560 | { |
| 561 | memset(dir->npe_ctx, 0, NPE_CTX_LEN); |
| 562 | dma_pool_free(ctx_pool, dir->npe_ctx, dir->npe_ctx_phys); |
| 563 | } |
| 564 | |
| 565 | static int init_tfm(struct crypto_tfm *tfm) |
| 566 | { |
| 567 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); |
| 568 | int ret; |
| 569 | |
| 570 | atomic_set(&ctx->configuring, 0); |
| 571 | ret = init_sa_dir(&ctx->encrypt); |
| 572 | if (ret) |
| 573 | return ret; |
| 574 | ret = init_sa_dir(&ctx->decrypt); |
| 575 | if (ret) { |
| 576 | free_sa_dir(&ctx->encrypt); |
| 577 | } |
| 578 | return ret; |
| 579 | } |
| 580 | |
| 581 | static int init_tfm_ablk(struct crypto_tfm *tfm) |
| 582 | { |
| 583 | tfm->crt_ablkcipher.reqsize = sizeof(struct ablk_ctx); |
| 584 | return init_tfm(tfm); |
| 585 | } |
| 586 | |
| 587 | static int init_tfm_aead(struct crypto_tfm *tfm) |
| 588 | { |
| 589 | tfm->crt_aead.reqsize = sizeof(struct aead_ctx); |
| 590 | return init_tfm(tfm); |
| 591 | } |
| 592 | |
| 593 | static void exit_tfm(struct crypto_tfm *tfm) |
| 594 | { |
| 595 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); |
| 596 | free_sa_dir(&ctx->encrypt); |
| 597 | free_sa_dir(&ctx->decrypt); |
| 598 | } |
| 599 | |
| 600 | static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target, |
| 601 | int init_len, u32 ctx_addr, const u8 *key, int key_len) |
| 602 | { |
| 603 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); |
| 604 | struct crypt_ctl *crypt; |
| 605 | struct buffer_desc *buf; |
| 606 | int i; |
| 607 | u8 *pad; |
| 608 | u32 pad_phys, buf_phys; |
| 609 | |
| 610 | BUILD_BUG_ON(NPE_CTX_LEN < HMAC_PAD_BLOCKLEN); |
| 611 | pad = dma_pool_alloc(ctx_pool, GFP_KERNEL, &pad_phys); |
| 612 | if (!pad) |
| 613 | return -ENOMEM; |
| 614 | buf = dma_pool_alloc(buffer_pool, GFP_KERNEL, &buf_phys); |
| 615 | if (!buf) { |
| 616 | dma_pool_free(ctx_pool, pad, pad_phys); |
| 617 | return -ENOMEM; |
| 618 | } |
| 619 | crypt = get_crypt_desc_emerg(); |
| 620 | if (!crypt) { |
| 621 | dma_pool_free(ctx_pool, pad, pad_phys); |
| 622 | dma_pool_free(buffer_pool, buf, buf_phys); |
| 623 | return -EAGAIN; |
| 624 | } |
| 625 | |
| 626 | memcpy(pad, key, key_len); |
| 627 | memset(pad + key_len, 0, HMAC_PAD_BLOCKLEN - key_len); |
| 628 | for (i = 0; i < HMAC_PAD_BLOCKLEN; i++) { |
| 629 | pad[i] ^= xpad; |
| 630 | } |
| 631 | |
| 632 | crypt->data.tfm = tfm; |
| 633 | crypt->regist_ptr = pad; |
| 634 | crypt->regist_buf = buf; |
| 635 | |
| 636 | crypt->auth_offs = 0; |
| 637 | crypt->auth_len = HMAC_PAD_BLOCKLEN; |
| 638 | crypt->crypto_ctx = ctx_addr; |
| 639 | crypt->src_buf = buf_phys; |
| 640 | crypt->icv_rev_aes = target; |
| 641 | crypt->mode = NPE_OP_HASH_GEN_ICV; |
| 642 | crypt->init_len = init_len; |
| 643 | crypt->ctl_flags |= CTL_FLAG_GEN_ICV; |
| 644 | |
| 645 | buf->next = 0; |
| 646 | buf->buf_len = HMAC_PAD_BLOCKLEN; |
| 647 | buf->pkt_len = 0; |
| 648 | buf->phys_addr = pad_phys; |
| 649 | |
| 650 | atomic_inc(&ctx->configuring); |
| 651 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); |
| 652 | BUG_ON(qmgr_stat_overflow(SEND_QID)); |
| 653 | return 0; |
| 654 | } |
| 655 | |
| 656 | static int setup_auth(struct crypto_tfm *tfm, int encrypt, unsigned authsize, |
| 657 | const u8 *key, int key_len, unsigned digest_len) |
| 658 | { |
| 659 | u32 itarget, otarget, npe_ctx_addr; |
| 660 | unsigned char *cinfo; |
| 661 | int init_len, ret = 0; |
| 662 | u32 cfgword; |
| 663 | struct ix_sa_dir *dir; |
| 664 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); |
| 665 | const struct ix_hash_algo *algo; |
| 666 | |
| 667 | dir = encrypt ? &ctx->encrypt : &ctx->decrypt; |
| 668 | cinfo = dir->npe_ctx + dir->npe_ctx_idx; |
| 669 | algo = ix_hash(tfm); |
| 670 | |
| 671 | /* write cfg word to cryptinfo */ |
| 672 | cfgword = algo->cfgword | ( authsize << 6); /* (authsize/4) << 8 */ |
Krzysztof Hałasa | ce05729 | 2010-01-10 14:20:10 +0100 | [diff] [blame] | 673 | #ifndef __ARMEB__ |
| 674 | cfgword ^= 0xAA000000; /* change the "byte swap" flags */ |
| 675 | #endif |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 676 | *(u32*)cinfo = cpu_to_be32(cfgword); |
| 677 | cinfo += sizeof(cfgword); |
| 678 | |
| 679 | /* write ICV to cryptinfo */ |
| 680 | memcpy(cinfo, algo->icv, digest_len); |
| 681 | cinfo += digest_len; |
| 682 | |
| 683 | itarget = dir->npe_ctx_phys + dir->npe_ctx_idx |
| 684 | + sizeof(algo->cfgword); |
| 685 | otarget = itarget + digest_len; |
| 686 | init_len = cinfo - (dir->npe_ctx + dir->npe_ctx_idx); |
| 687 | npe_ctx_addr = dir->npe_ctx_phys + dir->npe_ctx_idx; |
| 688 | |
| 689 | dir->npe_ctx_idx += init_len; |
| 690 | dir->npe_mode |= NPE_OP_HASH_ENABLE; |
| 691 | |
| 692 | if (!encrypt) |
| 693 | dir->npe_mode |= NPE_OP_HASH_VERIFY; |
| 694 | |
| 695 | ret = register_chain_var(tfm, HMAC_OPAD_VALUE, otarget, |
| 696 | init_len, npe_ctx_addr, key, key_len); |
| 697 | if (ret) |
| 698 | return ret; |
| 699 | return register_chain_var(tfm, HMAC_IPAD_VALUE, itarget, |
| 700 | init_len, npe_ctx_addr, key, key_len); |
| 701 | } |
| 702 | |
| 703 | static int gen_rev_aes_key(struct crypto_tfm *tfm) |
| 704 | { |
| 705 | struct crypt_ctl *crypt; |
| 706 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); |
| 707 | struct ix_sa_dir *dir = &ctx->decrypt; |
| 708 | |
| 709 | crypt = get_crypt_desc_emerg(); |
| 710 | if (!crypt) { |
| 711 | return -EAGAIN; |
| 712 | } |
| 713 | *(u32*)dir->npe_ctx |= cpu_to_be32(CIPH_ENCR); |
| 714 | |
| 715 | crypt->data.tfm = tfm; |
| 716 | crypt->crypt_offs = 0; |
| 717 | crypt->crypt_len = AES_BLOCK128; |
| 718 | crypt->src_buf = 0; |
| 719 | crypt->crypto_ctx = dir->npe_ctx_phys; |
| 720 | crypt->icv_rev_aes = dir->npe_ctx_phys + sizeof(u32); |
| 721 | crypt->mode = NPE_OP_ENC_GEN_KEY; |
| 722 | crypt->init_len = dir->npe_ctx_idx; |
| 723 | crypt->ctl_flags |= CTL_FLAG_GEN_REVAES; |
| 724 | |
| 725 | atomic_inc(&ctx->configuring); |
| 726 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); |
| 727 | BUG_ON(qmgr_stat_overflow(SEND_QID)); |
| 728 | return 0; |
| 729 | } |
| 730 | |
| 731 | static int setup_cipher(struct crypto_tfm *tfm, int encrypt, |
| 732 | const u8 *key, int key_len) |
| 733 | { |
| 734 | u8 *cinfo; |
| 735 | u32 cipher_cfg; |
| 736 | u32 keylen_cfg = 0; |
| 737 | struct ix_sa_dir *dir; |
| 738 | struct ixp_ctx *ctx = crypto_tfm_ctx(tfm); |
| 739 | u32 *flags = &tfm->crt_flags; |
| 740 | |
| 741 | dir = encrypt ? &ctx->encrypt : &ctx->decrypt; |
| 742 | cinfo = dir->npe_ctx; |
| 743 | |
| 744 | if (encrypt) { |
| 745 | cipher_cfg = cipher_cfg_enc(tfm); |
| 746 | dir->npe_mode |= NPE_OP_CRYPT_ENCRYPT; |
| 747 | } else { |
| 748 | cipher_cfg = cipher_cfg_dec(tfm); |
| 749 | } |
| 750 | if (cipher_cfg & MOD_AES) { |
| 751 | switch (key_len) { |
| 752 | case 16: keylen_cfg = MOD_AES128 | KEYLEN_128; break; |
| 753 | case 24: keylen_cfg = MOD_AES192 | KEYLEN_192; break; |
| 754 | case 32: keylen_cfg = MOD_AES256 | KEYLEN_256; break; |
| 755 | default: |
| 756 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 757 | return -EINVAL; |
| 758 | } |
| 759 | cipher_cfg |= keylen_cfg; |
| 760 | } else if (cipher_cfg & MOD_3DES) { |
| 761 | const u32 *K = (const u32 *)key; |
| 762 | if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) || |
| 763 | !((K[2] ^ K[4]) | (K[3] ^ K[5])))) |
| 764 | { |
| 765 | *flags |= CRYPTO_TFM_RES_BAD_KEY_SCHED; |
| 766 | return -EINVAL; |
| 767 | } |
| 768 | } else { |
| 769 | u32 tmp[DES_EXPKEY_WORDS]; |
| 770 | if (des_ekey(tmp, key) == 0) { |
| 771 | *flags |= CRYPTO_TFM_RES_WEAK_KEY; |
| 772 | } |
| 773 | } |
| 774 | /* write cfg word to cryptinfo */ |
| 775 | *(u32*)cinfo = cpu_to_be32(cipher_cfg); |
| 776 | cinfo += sizeof(cipher_cfg); |
| 777 | |
| 778 | /* write cipher key to cryptinfo */ |
| 779 | memcpy(cinfo, key, key_len); |
| 780 | /* NPE wants keylen set to DES3_EDE_KEY_SIZE even for single DES */ |
| 781 | if (key_len < DES3_EDE_KEY_SIZE && !(cipher_cfg & MOD_AES)) { |
| 782 | memset(cinfo + key_len, 0, DES3_EDE_KEY_SIZE -key_len); |
| 783 | key_len = DES3_EDE_KEY_SIZE; |
| 784 | } |
| 785 | dir->npe_ctx_idx = sizeof(cipher_cfg) + key_len; |
| 786 | dir->npe_mode |= NPE_OP_CRYPT_ENABLE; |
| 787 | if ((cipher_cfg & MOD_AES) && !encrypt) { |
| 788 | return gen_rev_aes_key(tfm); |
| 789 | } |
| 790 | return 0; |
| 791 | } |
| 792 | |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 793 | static struct buffer_desc *chainup_buffers(struct device *dev, |
| 794 | struct scatterlist *sg, unsigned nbytes, |
| 795 | struct buffer_desc *buf, gfp_t flags, |
| 796 | enum dma_data_direction dir) |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 797 | { |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 798 | for (;nbytes > 0; sg = scatterwalk_sg_next(sg)) { |
| 799 | unsigned len = min(nbytes, sg->length); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 800 | struct buffer_desc *next_buf; |
| 801 | u32 next_buf_phys; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 802 | void *ptr; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 803 | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 804 | nbytes -= len; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 805 | ptr = page_address(sg_page(sg)) + sg->offset; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 806 | next_buf = dma_pool_alloc(buffer_pool, flags, &next_buf_phys); |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 807 | if (!next_buf) { |
| 808 | buf = NULL; |
| 809 | break; |
| 810 | } |
| 811 | sg_dma_address(sg) = dma_map_single(dev, ptr, len, dir); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 812 | buf->next = next_buf; |
| 813 | buf->phys_next = next_buf_phys; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 814 | buf = next_buf; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 815 | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 816 | buf->phys_addr = sg_dma_address(sg); |
| 817 | buf->buf_len = len; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 818 | buf->dir = dir; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 819 | } |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 820 | buf->next = NULL; |
| 821 | buf->phys_next = 0; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 822 | return buf; |
| 823 | } |
| 824 | |
| 825 | static int ablk_setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
| 826 | unsigned int key_len) |
| 827 | { |
| 828 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 829 | u32 *flags = &tfm->base.crt_flags; |
| 830 | int ret; |
| 831 | |
| 832 | init_completion(&ctx->completion); |
| 833 | atomic_inc(&ctx->configuring); |
| 834 | |
| 835 | reset_sa_dir(&ctx->encrypt); |
| 836 | reset_sa_dir(&ctx->decrypt); |
| 837 | |
| 838 | ctx->encrypt.npe_mode = NPE_OP_HMAC_DISABLE; |
| 839 | ctx->decrypt.npe_mode = NPE_OP_HMAC_DISABLE; |
| 840 | |
| 841 | ret = setup_cipher(&tfm->base, 0, key, key_len); |
| 842 | if (ret) |
| 843 | goto out; |
| 844 | ret = setup_cipher(&tfm->base, 1, key, key_len); |
| 845 | if (ret) |
| 846 | goto out; |
| 847 | |
| 848 | if (*flags & CRYPTO_TFM_RES_WEAK_KEY) { |
| 849 | if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) { |
| 850 | ret = -EINVAL; |
| 851 | } else { |
| 852 | *flags &= ~CRYPTO_TFM_RES_WEAK_KEY; |
| 853 | } |
| 854 | } |
| 855 | out: |
| 856 | if (!atomic_dec_and_test(&ctx->configuring)) |
| 857 | wait_for_completion(&ctx->completion); |
| 858 | return ret; |
| 859 | } |
| 860 | |
| 861 | static int ablk_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
| 862 | unsigned int key_len) |
| 863 | { |
| 864 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 865 | |
| 866 | /* the nonce is stored in bytes at end of key */ |
| 867 | if (key_len < CTR_RFC3686_NONCE_SIZE) |
| 868 | return -EINVAL; |
| 869 | |
| 870 | memcpy(ctx->nonce, key + (key_len - CTR_RFC3686_NONCE_SIZE), |
| 871 | CTR_RFC3686_NONCE_SIZE); |
| 872 | |
| 873 | key_len -= CTR_RFC3686_NONCE_SIZE; |
| 874 | return ablk_setkey(tfm, key, key_len); |
| 875 | } |
| 876 | |
| 877 | static int ablk_perform(struct ablkcipher_request *req, int encrypt) |
| 878 | { |
| 879 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| 880 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 881 | unsigned ivsize = crypto_ablkcipher_ivsize(tfm); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 882 | struct ix_sa_dir *dir; |
| 883 | struct crypt_ctl *crypt; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 884 | unsigned int nbytes = req->nbytes; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 885 | enum dma_data_direction src_direction = DMA_BIDIRECTIONAL; |
| 886 | struct ablk_ctx *req_ctx = ablkcipher_request_ctx(req); |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 887 | struct buffer_desc src_hook; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 888 | gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? |
| 889 | GFP_KERNEL : GFP_ATOMIC; |
| 890 | |
| 891 | if (qmgr_stat_full(SEND_QID)) |
| 892 | return -EAGAIN; |
| 893 | if (atomic_read(&ctx->configuring)) |
| 894 | return -EAGAIN; |
| 895 | |
| 896 | dir = encrypt ? &ctx->encrypt : &ctx->decrypt; |
| 897 | |
| 898 | crypt = get_crypt_desc(); |
| 899 | if (!crypt) |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 900 | return -ENOMEM; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 901 | |
| 902 | crypt->data.ablk_req = req; |
| 903 | crypt->crypto_ctx = dir->npe_ctx_phys; |
| 904 | crypt->mode = dir->npe_mode; |
| 905 | crypt->init_len = dir->npe_ctx_idx; |
| 906 | |
| 907 | crypt->crypt_offs = 0; |
| 908 | crypt->crypt_len = nbytes; |
| 909 | |
| 910 | BUG_ON(ivsize && !req->info); |
| 911 | memcpy(crypt->iv, req->info, ivsize); |
| 912 | if (req->src != req->dst) { |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 913 | struct buffer_desc dst_hook; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 914 | crypt->mode |= NPE_OP_NOT_IN_PLACE; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 915 | /* This was never tested by Intel |
| 916 | * for more than one dst buffer, I think. */ |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 917 | BUG_ON(req->dst->length < nbytes); |
| 918 | req_ctx->dst = NULL; |
| 919 | if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook, |
| 920 | flags, DMA_FROM_DEVICE)) |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 921 | goto free_buf_dest; |
| 922 | src_direction = DMA_TO_DEVICE; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 923 | req_ctx->dst = dst_hook.next; |
| 924 | crypt->dst_buf = dst_hook.phys_next; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 925 | } else { |
| 926 | req_ctx->dst = NULL; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 927 | } |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 928 | req_ctx->src = NULL; |
| 929 | if (!chainup_buffers(dev, req->src, nbytes, &src_hook, |
| 930 | flags, src_direction)) |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 931 | goto free_buf_src; |
| 932 | |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 933 | req_ctx->src = src_hook.next; |
| 934 | crypt->src_buf = src_hook.phys_next; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 935 | crypt->ctl_flags |= CTL_FLAG_PERFORM_ABLK; |
| 936 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); |
| 937 | BUG_ON(qmgr_stat_overflow(SEND_QID)); |
| 938 | return -EINPROGRESS; |
| 939 | |
| 940 | free_buf_src: |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 941 | free_buf_chain(dev, req_ctx->src, crypt->src_buf); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 942 | free_buf_dest: |
| 943 | if (req->src != req->dst) { |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 944 | free_buf_chain(dev, req_ctx->dst, crypt->dst_buf); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 945 | } |
| 946 | crypt->ctl_flags = CTL_FLAG_UNUSED; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 947 | return -ENOMEM; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | static int ablk_encrypt(struct ablkcipher_request *req) |
| 951 | { |
| 952 | return ablk_perform(req, 1); |
| 953 | } |
| 954 | |
| 955 | static int ablk_decrypt(struct ablkcipher_request *req) |
| 956 | { |
| 957 | return ablk_perform(req, 0); |
| 958 | } |
| 959 | |
| 960 | static int ablk_rfc3686_crypt(struct ablkcipher_request *req) |
| 961 | { |
| 962 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| 963 | struct ixp_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 964 | u8 iv[CTR_RFC3686_BLOCK_SIZE]; |
| 965 | u8 *info = req->info; |
| 966 | int ret; |
| 967 | |
| 968 | /* set up counter block */ |
| 969 | memcpy(iv, ctx->nonce, CTR_RFC3686_NONCE_SIZE); |
| 970 | memcpy(iv + CTR_RFC3686_NONCE_SIZE, info, CTR_RFC3686_IV_SIZE); |
| 971 | |
| 972 | /* initialize counter portion of counter block */ |
| 973 | *(__be32 *)(iv + CTR_RFC3686_NONCE_SIZE + CTR_RFC3686_IV_SIZE) = |
| 974 | cpu_to_be32(1); |
| 975 | |
| 976 | req->info = iv; |
| 977 | ret = ablk_perform(req, 1); |
| 978 | req->info = info; |
| 979 | return ret; |
| 980 | } |
| 981 | |
| 982 | static int hmac_inconsistent(struct scatterlist *sg, unsigned start, |
| 983 | unsigned int nbytes) |
| 984 | { |
| 985 | int offset = 0; |
| 986 | |
| 987 | if (!nbytes) |
| 988 | return 0; |
| 989 | |
| 990 | for (;;) { |
| 991 | if (start < offset + sg->length) |
| 992 | break; |
| 993 | |
| 994 | offset += sg->length; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 995 | sg = scatterwalk_sg_next(sg); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 996 | } |
| 997 | return (start + nbytes > offset + sg->length); |
| 998 | } |
| 999 | |
| 1000 | static int aead_perform(struct aead_request *req, int encrypt, |
| 1001 | int cryptoffset, int eff_cryptlen, u8 *iv) |
| 1002 | { |
| 1003 | struct crypto_aead *tfm = crypto_aead_reqtfm(req); |
| 1004 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); |
| 1005 | unsigned ivsize = crypto_aead_ivsize(tfm); |
| 1006 | unsigned authsize = crypto_aead_authsize(tfm); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1007 | struct ix_sa_dir *dir; |
| 1008 | struct crypt_ctl *crypt; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1009 | unsigned int cryptlen; |
| 1010 | struct buffer_desc *buf, src_hook; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1011 | struct aead_ctx *req_ctx = aead_request_ctx(req); |
| 1012 | gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? |
| 1013 | GFP_KERNEL : GFP_ATOMIC; |
| 1014 | |
| 1015 | if (qmgr_stat_full(SEND_QID)) |
| 1016 | return -EAGAIN; |
| 1017 | if (atomic_read(&ctx->configuring)) |
| 1018 | return -EAGAIN; |
| 1019 | |
| 1020 | if (encrypt) { |
| 1021 | dir = &ctx->encrypt; |
| 1022 | cryptlen = req->cryptlen; |
| 1023 | } else { |
| 1024 | dir = &ctx->decrypt; |
| 1025 | /* req->cryptlen includes the authsize when decrypting */ |
| 1026 | cryptlen = req->cryptlen -authsize; |
| 1027 | eff_cryptlen -= authsize; |
| 1028 | } |
| 1029 | crypt = get_crypt_desc(); |
| 1030 | if (!crypt) |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1031 | return -ENOMEM; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1032 | |
| 1033 | crypt->data.aead_req = req; |
| 1034 | crypt->crypto_ctx = dir->npe_ctx_phys; |
| 1035 | crypt->mode = dir->npe_mode; |
| 1036 | crypt->init_len = dir->npe_ctx_idx; |
| 1037 | |
| 1038 | crypt->crypt_offs = cryptoffset; |
| 1039 | crypt->crypt_len = eff_cryptlen; |
| 1040 | |
| 1041 | crypt->auth_offs = 0; |
| 1042 | crypt->auth_len = req->assoclen + ivsize + cryptlen; |
| 1043 | BUG_ON(ivsize && !req->iv); |
| 1044 | memcpy(crypt->iv, req->iv, ivsize); |
| 1045 | |
| 1046 | if (req->src != req->dst) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1047 | BUG(); /* -ENOTSUP because of my laziness */ |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1048 | } |
| 1049 | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1050 | /* ASSOC data */ |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1051 | buf = chainup_buffers(dev, req->assoc, req->assoclen, &src_hook, |
| 1052 | flags, DMA_TO_DEVICE); |
| 1053 | req_ctx->buffer = src_hook.next; |
| 1054 | crypt->src_buf = src_hook.phys_next; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1055 | if (!buf) |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1056 | goto out; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1057 | /* IV */ |
| 1058 | sg_init_table(&req_ctx->ivlist, 1); |
| 1059 | sg_set_buf(&req_ctx->ivlist, iv, ivsize); |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1060 | buf = chainup_buffers(dev, &req_ctx->ivlist, ivsize, buf, flags, |
| 1061 | DMA_BIDIRECTIONAL); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1062 | if (!buf) |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1063 | goto free_chain; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1064 | if (unlikely(hmac_inconsistent(req->src, cryptlen, authsize))) { |
| 1065 | /* The 12 hmac bytes are scattered, |
| 1066 | * we need to copy them into a safe buffer */ |
| 1067 | req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags, |
| 1068 | &crypt->icv_rev_aes); |
| 1069 | if (unlikely(!req_ctx->hmac_virt)) |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1070 | goto free_chain; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1071 | if (!encrypt) { |
| 1072 | scatterwalk_map_and_copy(req_ctx->hmac_virt, |
| 1073 | req->src, cryptlen, authsize, 0); |
| 1074 | } |
| 1075 | req_ctx->encrypt = encrypt; |
| 1076 | } else { |
| 1077 | req_ctx->hmac_virt = NULL; |
| 1078 | } |
| 1079 | /* Crypt */ |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1080 | buf = chainup_buffers(dev, req->src, cryptlen + authsize, buf, flags, |
| 1081 | DMA_BIDIRECTIONAL); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1082 | if (!buf) |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1083 | goto free_hmac_virt; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1084 | if (!req_ctx->hmac_virt) { |
| 1085 | crypt->icv_rev_aes = buf->phys_addr + buf->buf_len - authsize; |
| 1086 | } |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1087 | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1088 | crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD; |
| 1089 | qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt)); |
| 1090 | BUG_ON(qmgr_stat_overflow(SEND_QID)); |
| 1091 | return -EINPROGRESS; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1092 | free_hmac_virt: |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1093 | if (req_ctx->hmac_virt) { |
| 1094 | dma_pool_free(buffer_pool, req_ctx->hmac_virt, |
| 1095 | crypt->icv_rev_aes); |
| 1096 | } |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1097 | free_chain: |
| 1098 | free_buf_chain(dev, req_ctx->buffer, crypt->src_buf); |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1099 | out: |
| 1100 | crypt->ctl_flags = CTL_FLAG_UNUSED; |
Christian Hohnstaedt | 0d44dc5 | 2009-03-27 15:09:05 +0800 | [diff] [blame] | 1101 | return -ENOMEM; |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1102 | } |
| 1103 | |
| 1104 | static int aead_setup(struct crypto_aead *tfm, unsigned int authsize) |
| 1105 | { |
| 1106 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); |
| 1107 | u32 *flags = &tfm->base.crt_flags; |
| 1108 | unsigned digest_len = crypto_aead_alg(tfm)->maxauthsize; |
| 1109 | int ret; |
| 1110 | |
| 1111 | if (!ctx->enckey_len && !ctx->authkey_len) |
| 1112 | return 0; |
| 1113 | init_completion(&ctx->completion); |
| 1114 | atomic_inc(&ctx->configuring); |
| 1115 | |
| 1116 | reset_sa_dir(&ctx->encrypt); |
| 1117 | reset_sa_dir(&ctx->decrypt); |
| 1118 | |
| 1119 | ret = setup_cipher(&tfm->base, 0, ctx->enckey, ctx->enckey_len); |
| 1120 | if (ret) |
| 1121 | goto out; |
| 1122 | ret = setup_cipher(&tfm->base, 1, ctx->enckey, ctx->enckey_len); |
| 1123 | if (ret) |
| 1124 | goto out; |
| 1125 | ret = setup_auth(&tfm->base, 0, authsize, ctx->authkey, |
| 1126 | ctx->authkey_len, digest_len); |
| 1127 | if (ret) |
| 1128 | goto out; |
| 1129 | ret = setup_auth(&tfm->base, 1, authsize, ctx->authkey, |
| 1130 | ctx->authkey_len, digest_len); |
| 1131 | if (ret) |
| 1132 | goto out; |
| 1133 | |
| 1134 | if (*flags & CRYPTO_TFM_RES_WEAK_KEY) { |
| 1135 | if (*flags & CRYPTO_TFM_REQ_WEAK_KEY) { |
| 1136 | ret = -EINVAL; |
| 1137 | goto out; |
| 1138 | } else { |
| 1139 | *flags &= ~CRYPTO_TFM_RES_WEAK_KEY; |
| 1140 | } |
| 1141 | } |
| 1142 | out: |
| 1143 | if (!atomic_dec_and_test(&ctx->configuring)) |
| 1144 | wait_for_completion(&ctx->completion); |
| 1145 | return ret; |
| 1146 | } |
| 1147 | |
| 1148 | static int aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize) |
| 1149 | { |
| 1150 | int max = crypto_aead_alg(tfm)->maxauthsize >> 2; |
| 1151 | |
| 1152 | if ((authsize>>2) < 1 || (authsize>>2) > max || (authsize & 3)) |
| 1153 | return -EINVAL; |
| 1154 | return aead_setup(tfm, authsize); |
| 1155 | } |
| 1156 | |
| 1157 | static int aead_setkey(struct crypto_aead *tfm, const u8 *key, |
| 1158 | unsigned int keylen) |
| 1159 | { |
| 1160 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); |
| 1161 | struct rtattr *rta = (struct rtattr *)key; |
| 1162 | struct crypto_authenc_key_param *param; |
| 1163 | |
| 1164 | if (!RTA_OK(rta, keylen)) |
| 1165 | goto badkey; |
| 1166 | if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM) |
| 1167 | goto badkey; |
| 1168 | if (RTA_PAYLOAD(rta) < sizeof(*param)) |
| 1169 | goto badkey; |
| 1170 | |
| 1171 | param = RTA_DATA(rta); |
| 1172 | ctx->enckey_len = be32_to_cpu(param->enckeylen); |
| 1173 | |
| 1174 | key += RTA_ALIGN(rta->rta_len); |
| 1175 | keylen -= RTA_ALIGN(rta->rta_len); |
| 1176 | |
| 1177 | if (keylen < ctx->enckey_len) |
| 1178 | goto badkey; |
| 1179 | |
| 1180 | ctx->authkey_len = keylen - ctx->enckey_len; |
| 1181 | memcpy(ctx->enckey, key + ctx->authkey_len, ctx->enckey_len); |
| 1182 | memcpy(ctx->authkey, key, ctx->authkey_len); |
| 1183 | |
| 1184 | return aead_setup(tfm, crypto_aead_authsize(tfm)); |
| 1185 | badkey: |
| 1186 | ctx->enckey_len = 0; |
| 1187 | crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); |
| 1188 | return -EINVAL; |
| 1189 | } |
| 1190 | |
| 1191 | static int aead_encrypt(struct aead_request *req) |
| 1192 | { |
| 1193 | unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req)); |
| 1194 | return aead_perform(req, 1, req->assoclen + ivsize, |
| 1195 | req->cryptlen, req->iv); |
| 1196 | } |
| 1197 | |
| 1198 | static int aead_decrypt(struct aead_request *req) |
| 1199 | { |
| 1200 | unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req)); |
| 1201 | return aead_perform(req, 0, req->assoclen + ivsize, |
| 1202 | req->cryptlen, req->iv); |
| 1203 | } |
| 1204 | |
| 1205 | static int aead_givencrypt(struct aead_givcrypt_request *req) |
| 1206 | { |
| 1207 | struct crypto_aead *tfm = aead_givcrypt_reqtfm(req); |
| 1208 | struct ixp_ctx *ctx = crypto_aead_ctx(tfm); |
| 1209 | unsigned len, ivsize = crypto_aead_ivsize(tfm); |
| 1210 | __be64 seq; |
| 1211 | |
| 1212 | /* copied from eseqiv.c */ |
| 1213 | if (!ctx->salted) { |
| 1214 | get_random_bytes(ctx->salt, ivsize); |
| 1215 | ctx->salted = 1; |
| 1216 | } |
| 1217 | memcpy(req->areq.iv, ctx->salt, ivsize); |
| 1218 | len = ivsize; |
| 1219 | if (ivsize > sizeof(u64)) { |
| 1220 | memset(req->giv, 0, ivsize - sizeof(u64)); |
| 1221 | len = sizeof(u64); |
| 1222 | } |
| 1223 | seq = cpu_to_be64(req->seq); |
| 1224 | memcpy(req->giv + ivsize - len, &seq, len); |
| 1225 | return aead_perform(&req->areq, 1, req->areq.assoclen, |
| 1226 | req->areq.cryptlen +ivsize, req->giv); |
| 1227 | } |
| 1228 | |
| 1229 | static struct ixp_alg ixp4xx_algos[] = { |
| 1230 | { |
| 1231 | .crypto = { |
| 1232 | .cra_name = "cbc(des)", |
| 1233 | .cra_blocksize = DES_BLOCK_SIZE, |
| 1234 | .cra_u = { .ablkcipher = { |
| 1235 | .min_keysize = DES_KEY_SIZE, |
| 1236 | .max_keysize = DES_KEY_SIZE, |
| 1237 | .ivsize = DES_BLOCK_SIZE, |
| 1238 | .geniv = "eseqiv", |
| 1239 | } |
| 1240 | } |
| 1241 | }, |
| 1242 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192, |
| 1243 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192, |
| 1244 | |
| 1245 | }, { |
| 1246 | .crypto = { |
| 1247 | .cra_name = "ecb(des)", |
| 1248 | .cra_blocksize = DES_BLOCK_SIZE, |
| 1249 | .cra_u = { .ablkcipher = { |
| 1250 | .min_keysize = DES_KEY_SIZE, |
| 1251 | .max_keysize = DES_KEY_SIZE, |
| 1252 | } |
| 1253 | } |
| 1254 | }, |
| 1255 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_ECB | KEYLEN_192, |
| 1256 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_ECB | KEYLEN_192, |
| 1257 | }, { |
| 1258 | .crypto = { |
| 1259 | .cra_name = "cbc(des3_ede)", |
| 1260 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1261 | .cra_u = { .ablkcipher = { |
| 1262 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 1263 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 1264 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1265 | .geniv = "eseqiv", |
| 1266 | } |
| 1267 | } |
| 1268 | }, |
| 1269 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192, |
| 1270 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192, |
| 1271 | }, { |
| 1272 | .crypto = { |
| 1273 | .cra_name = "ecb(des3_ede)", |
| 1274 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1275 | .cra_u = { .ablkcipher = { |
| 1276 | .min_keysize = DES3_EDE_KEY_SIZE, |
| 1277 | .max_keysize = DES3_EDE_KEY_SIZE, |
| 1278 | } |
| 1279 | } |
| 1280 | }, |
| 1281 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_ECB | KEYLEN_192, |
| 1282 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_ECB | KEYLEN_192, |
| 1283 | }, { |
| 1284 | .crypto = { |
| 1285 | .cra_name = "cbc(aes)", |
| 1286 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1287 | .cra_u = { .ablkcipher = { |
| 1288 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1289 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1290 | .ivsize = AES_BLOCK_SIZE, |
| 1291 | .geniv = "eseqiv", |
| 1292 | } |
| 1293 | } |
| 1294 | }, |
| 1295 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC, |
| 1296 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC, |
| 1297 | }, { |
| 1298 | .crypto = { |
| 1299 | .cra_name = "ecb(aes)", |
| 1300 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1301 | .cra_u = { .ablkcipher = { |
| 1302 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1303 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1304 | } |
| 1305 | } |
| 1306 | }, |
| 1307 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_ECB, |
| 1308 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_ECB, |
| 1309 | }, { |
| 1310 | .crypto = { |
| 1311 | .cra_name = "ctr(aes)", |
| 1312 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1313 | .cra_u = { .ablkcipher = { |
| 1314 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1315 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1316 | .ivsize = AES_BLOCK_SIZE, |
| 1317 | .geniv = "eseqiv", |
| 1318 | } |
| 1319 | } |
| 1320 | }, |
| 1321 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR, |
| 1322 | .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR, |
| 1323 | }, { |
| 1324 | .crypto = { |
| 1325 | .cra_name = "rfc3686(ctr(aes))", |
| 1326 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1327 | .cra_u = { .ablkcipher = { |
| 1328 | .min_keysize = AES_MIN_KEY_SIZE, |
| 1329 | .max_keysize = AES_MAX_KEY_SIZE, |
| 1330 | .ivsize = AES_BLOCK_SIZE, |
| 1331 | .geniv = "eseqiv", |
| 1332 | .setkey = ablk_rfc3686_setkey, |
| 1333 | .encrypt = ablk_rfc3686_crypt, |
| 1334 | .decrypt = ablk_rfc3686_crypt } |
| 1335 | } |
| 1336 | }, |
| 1337 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR, |
| 1338 | .cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR, |
| 1339 | }, { |
| 1340 | .crypto = { |
| 1341 | .cra_name = "authenc(hmac(md5),cbc(des))", |
| 1342 | .cra_blocksize = DES_BLOCK_SIZE, |
| 1343 | .cra_u = { .aead = { |
| 1344 | .ivsize = DES_BLOCK_SIZE, |
| 1345 | .maxauthsize = MD5_DIGEST_SIZE, |
| 1346 | } |
| 1347 | } |
| 1348 | }, |
| 1349 | .hash = &hash_alg_md5, |
| 1350 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192, |
| 1351 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192, |
| 1352 | }, { |
| 1353 | .crypto = { |
| 1354 | .cra_name = "authenc(hmac(md5),cbc(des3_ede))", |
| 1355 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1356 | .cra_u = { .aead = { |
| 1357 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1358 | .maxauthsize = MD5_DIGEST_SIZE, |
| 1359 | } |
| 1360 | } |
| 1361 | }, |
| 1362 | .hash = &hash_alg_md5, |
| 1363 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192, |
| 1364 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192, |
| 1365 | }, { |
| 1366 | .crypto = { |
| 1367 | .cra_name = "authenc(hmac(sha1),cbc(des))", |
| 1368 | .cra_blocksize = DES_BLOCK_SIZE, |
| 1369 | .cra_u = { .aead = { |
| 1370 | .ivsize = DES_BLOCK_SIZE, |
| 1371 | .maxauthsize = SHA1_DIGEST_SIZE, |
| 1372 | } |
| 1373 | } |
| 1374 | }, |
| 1375 | .hash = &hash_alg_sha1, |
| 1376 | .cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192, |
| 1377 | .cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192, |
| 1378 | }, { |
| 1379 | .crypto = { |
| 1380 | .cra_name = "authenc(hmac(sha1),cbc(des3_ede))", |
| 1381 | .cra_blocksize = DES3_EDE_BLOCK_SIZE, |
| 1382 | .cra_u = { .aead = { |
| 1383 | .ivsize = DES3_EDE_BLOCK_SIZE, |
| 1384 | .maxauthsize = SHA1_DIGEST_SIZE, |
| 1385 | } |
| 1386 | } |
| 1387 | }, |
| 1388 | .hash = &hash_alg_sha1, |
| 1389 | .cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192, |
| 1390 | .cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192, |
| 1391 | }, { |
| 1392 | .crypto = { |
| 1393 | .cra_name = "authenc(hmac(md5),cbc(aes))", |
| 1394 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1395 | .cra_u = { .aead = { |
| 1396 | .ivsize = AES_BLOCK_SIZE, |
| 1397 | .maxauthsize = MD5_DIGEST_SIZE, |
| 1398 | } |
| 1399 | } |
| 1400 | }, |
| 1401 | .hash = &hash_alg_md5, |
| 1402 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC, |
| 1403 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC, |
| 1404 | }, { |
| 1405 | .crypto = { |
| 1406 | .cra_name = "authenc(hmac(sha1),cbc(aes))", |
| 1407 | .cra_blocksize = AES_BLOCK_SIZE, |
| 1408 | .cra_u = { .aead = { |
| 1409 | .ivsize = AES_BLOCK_SIZE, |
| 1410 | .maxauthsize = SHA1_DIGEST_SIZE, |
| 1411 | } |
| 1412 | } |
| 1413 | }, |
| 1414 | .hash = &hash_alg_sha1, |
| 1415 | .cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC, |
| 1416 | .cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC, |
| 1417 | } }; |
| 1418 | |
| 1419 | #define IXP_POSTFIX "-ixp4xx" |
| 1420 | static int __init ixp_module_init(void) |
| 1421 | { |
| 1422 | int num = ARRAY_SIZE(ixp4xx_algos); |
| 1423 | int i,err ; |
| 1424 | |
| 1425 | if (platform_device_register(&pseudo_dev)) |
| 1426 | return -ENODEV; |
| 1427 | |
| 1428 | spin_lock_init(&desc_lock); |
| 1429 | spin_lock_init(&emerg_lock); |
| 1430 | |
| 1431 | err = init_ixp_crypto(); |
| 1432 | if (err) { |
| 1433 | platform_device_unregister(&pseudo_dev); |
| 1434 | return err; |
| 1435 | } |
| 1436 | for (i=0; i< num; i++) { |
| 1437 | struct crypto_alg *cra = &ixp4xx_algos[i].crypto; |
| 1438 | |
| 1439 | if (snprintf(cra->cra_driver_name, CRYPTO_MAX_ALG_NAME, |
| 1440 | "%s"IXP_POSTFIX, cra->cra_name) >= |
| 1441 | CRYPTO_MAX_ALG_NAME) |
| 1442 | { |
| 1443 | continue; |
| 1444 | } |
| 1445 | if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) { |
| 1446 | continue; |
| 1447 | } |
| 1448 | if (!ixp4xx_algos[i].hash) { |
| 1449 | /* block ciphers */ |
| 1450 | cra->cra_type = &crypto_ablkcipher_type; |
| 1451 | cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 1452 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1453 | CRYPTO_ALG_ASYNC; |
| 1454 | if (!cra->cra_ablkcipher.setkey) |
| 1455 | cra->cra_ablkcipher.setkey = ablk_setkey; |
| 1456 | if (!cra->cra_ablkcipher.encrypt) |
| 1457 | cra->cra_ablkcipher.encrypt = ablk_encrypt; |
| 1458 | if (!cra->cra_ablkcipher.decrypt) |
| 1459 | cra->cra_ablkcipher.decrypt = ablk_decrypt; |
| 1460 | cra->cra_init = init_tfm_ablk; |
| 1461 | } else { |
| 1462 | /* authenc */ |
| 1463 | cra->cra_type = &crypto_aead_type; |
| 1464 | cra->cra_flags = CRYPTO_ALG_TYPE_AEAD | |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 1465 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
Christian Hohnstaedt | 81bef01 | 2008-06-25 14:38:47 +0800 | [diff] [blame] | 1466 | CRYPTO_ALG_ASYNC; |
| 1467 | cra->cra_aead.setkey = aead_setkey; |
| 1468 | cra->cra_aead.setauthsize = aead_setauthsize; |
| 1469 | cra->cra_aead.encrypt = aead_encrypt; |
| 1470 | cra->cra_aead.decrypt = aead_decrypt; |
| 1471 | cra->cra_aead.givencrypt = aead_givencrypt; |
| 1472 | cra->cra_init = init_tfm_aead; |
| 1473 | } |
| 1474 | cra->cra_ctxsize = sizeof(struct ixp_ctx); |
| 1475 | cra->cra_module = THIS_MODULE; |
| 1476 | cra->cra_alignmask = 3; |
| 1477 | cra->cra_priority = 300; |
| 1478 | cra->cra_exit = exit_tfm; |
| 1479 | if (crypto_register_alg(cra)) |
| 1480 | printk(KERN_ERR "Failed to register '%s'\n", |
| 1481 | cra->cra_name); |
| 1482 | else |
| 1483 | ixp4xx_algos[i].registered = 1; |
| 1484 | } |
| 1485 | return 0; |
| 1486 | } |
| 1487 | |
| 1488 | static void __exit ixp_module_exit(void) |
| 1489 | { |
| 1490 | int num = ARRAY_SIZE(ixp4xx_algos); |
| 1491 | int i; |
| 1492 | |
| 1493 | for (i=0; i< num; i++) { |
| 1494 | if (ixp4xx_algos[i].registered) |
| 1495 | crypto_unregister_alg(&ixp4xx_algos[i].crypto); |
| 1496 | } |
| 1497 | release_ixp_crypto(); |
| 1498 | platform_device_unregister(&pseudo_dev); |
| 1499 | } |
| 1500 | |
| 1501 | module_init(ixp_module_init); |
| 1502 | module_exit(ixp_module_exit); |
| 1503 | |
| 1504 | MODULE_LICENSE("GPL"); |
| 1505 | MODULE_AUTHOR("Christian Hohnstaedt <chohnstaedt@innominate.com>"); |
| 1506 | MODULE_DESCRIPTION("IXP4xx hardware crypto"); |
| 1507 | |