David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 1 | /* Glue code for AES encryption optimized for sparc64 crypto opcodes. |
| 2 | * |
| 3 | * This is based largely upon arch/x86/crypto/aesni-intel_glue.c |
| 4 | * |
| 5 | * Copyright (C) 2008, Intel Corp. |
| 6 | * Author: Huang Ying <ying.huang@intel.com> |
| 7 | * |
| 8 | * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD |
| 9 | * interface for 64-bit kernels. |
| 10 | * Authors: Adrian Hoban <adrian.hoban@intel.com> |
| 11 | * Gabriele Paoloni <gabriele.paoloni@intel.com> |
| 12 | * Tadeusz Struk (tadeusz.struk@intel.com) |
| 13 | * Aidan O'Mahony (aidan.o.mahony@intel.com) |
| 14 | * Copyright (c) 2010, Intel Corporation. |
| 15 | */ |
| 16 | |
David S. Miller | 7174168 | 2012-09-15 09:17:10 -0700 | [diff] [blame] | 17 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 18 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 19 | #include <linux/crypto.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <crypto/algapi.h> |
| 25 | #include <crypto/aes.h> |
| 26 | |
| 27 | #include <asm/fpumacro.h> |
| 28 | #include <asm/pstate.h> |
| 29 | #include <asm/elf.h> |
| 30 | |
David S. Miller | 1080362 | 2012-09-15 09:06:30 -0700 | [diff] [blame] | 31 | #include "opcodes.h" |
| 32 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 33 | struct aes_ops { |
| 34 | void (*encrypt)(const u64 *key, const u32 *input, u32 *output); |
| 35 | void (*decrypt)(const u64 *key, const u32 *input, u32 *output); |
| 36 | void (*load_encrypt_keys)(const u64 *key); |
| 37 | void (*load_decrypt_keys)(const u64 *key); |
| 38 | void (*ecb_encrypt)(const u64 *key, const u64 *input, u64 *output, |
| 39 | unsigned int len); |
| 40 | void (*ecb_decrypt)(const u64 *key, const u64 *input, u64 *output, |
| 41 | unsigned int len); |
| 42 | void (*cbc_encrypt)(const u64 *key, const u64 *input, u64 *output, |
| 43 | unsigned int len, u64 *iv); |
| 44 | void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output, |
| 45 | unsigned int len, u64 *iv); |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 46 | void (*ctr_crypt)(const u64 *key, const u64 *input, u64 *output, |
| 47 | unsigned int len, u64 *iv); |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 50 | struct crypto_sparc64_aes_ctx { |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 51 | struct aes_ops *ops; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 52 | u64 key[AES_MAX_KEYLENGTH / sizeof(u64)]; |
| 53 | u32 key_length; |
| 54 | u32 expanded_key_length; |
| 55 | }; |
| 56 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 57 | extern void aes_sparc64_encrypt_128(const u64 *key, const u32 *input, |
| 58 | u32 *output); |
| 59 | extern void aes_sparc64_encrypt_192(const u64 *key, const u32 *input, |
| 60 | u32 *output); |
| 61 | extern void aes_sparc64_encrypt_256(const u64 *key, const u32 *input, |
| 62 | u32 *output); |
| 63 | |
| 64 | extern void aes_sparc64_decrypt_128(const u64 *key, const u32 *input, |
| 65 | u32 *output); |
| 66 | extern void aes_sparc64_decrypt_192(const u64 *key, const u32 *input, |
| 67 | u32 *output); |
| 68 | extern void aes_sparc64_decrypt_256(const u64 *key, const u32 *input, |
| 69 | u32 *output); |
| 70 | |
| 71 | extern void aes_sparc64_load_encrypt_keys_128(const u64 *key); |
| 72 | extern void aes_sparc64_load_encrypt_keys_192(const u64 *key); |
| 73 | extern void aes_sparc64_load_encrypt_keys_256(const u64 *key); |
| 74 | |
| 75 | extern void aes_sparc64_load_decrypt_keys_128(const u64 *key); |
| 76 | extern void aes_sparc64_load_decrypt_keys_192(const u64 *key); |
| 77 | extern void aes_sparc64_load_decrypt_keys_256(const u64 *key); |
| 78 | |
| 79 | extern void aes_sparc64_ecb_encrypt_128(const u64 *key, const u64 *input, |
| 80 | u64 *output, unsigned int len); |
| 81 | extern void aes_sparc64_ecb_encrypt_192(const u64 *key, const u64 *input, |
| 82 | u64 *output, unsigned int len); |
| 83 | extern void aes_sparc64_ecb_encrypt_256(const u64 *key, const u64 *input, |
| 84 | u64 *output, unsigned int len); |
| 85 | |
| 86 | extern void aes_sparc64_ecb_decrypt_128(const u64 *key, const u64 *input, |
| 87 | u64 *output, unsigned int len); |
| 88 | extern void aes_sparc64_ecb_decrypt_192(const u64 *key, const u64 *input, |
| 89 | u64 *output, unsigned int len); |
| 90 | extern void aes_sparc64_ecb_decrypt_256(const u64 *key, const u64 *input, |
| 91 | u64 *output, unsigned int len); |
| 92 | |
| 93 | extern void aes_sparc64_cbc_encrypt_128(const u64 *key, const u64 *input, |
| 94 | u64 *output, unsigned int len, |
| 95 | u64 *iv); |
| 96 | |
| 97 | extern void aes_sparc64_cbc_encrypt_192(const u64 *key, const u64 *input, |
| 98 | u64 *output, unsigned int len, |
| 99 | u64 *iv); |
| 100 | |
| 101 | extern void aes_sparc64_cbc_encrypt_256(const u64 *key, const u64 *input, |
| 102 | u64 *output, unsigned int len, |
| 103 | u64 *iv); |
| 104 | |
| 105 | extern void aes_sparc64_cbc_decrypt_128(const u64 *key, const u64 *input, |
| 106 | u64 *output, unsigned int len, |
| 107 | u64 *iv); |
| 108 | |
| 109 | extern void aes_sparc64_cbc_decrypt_192(const u64 *key, const u64 *input, |
| 110 | u64 *output, unsigned int len, |
| 111 | u64 *iv); |
| 112 | |
| 113 | extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input, |
| 114 | u64 *output, unsigned int len, |
| 115 | u64 *iv); |
| 116 | |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 117 | extern void aes_sparc64_ctr_crypt_128(const u64 *key, const u64 *input, |
| 118 | u64 *output, unsigned int len, |
| 119 | u64 *iv); |
| 120 | extern void aes_sparc64_ctr_crypt_192(const u64 *key, const u64 *input, |
| 121 | u64 *output, unsigned int len, |
| 122 | u64 *iv); |
| 123 | extern void aes_sparc64_ctr_crypt_256(const u64 *key, const u64 *input, |
| 124 | u64 *output, unsigned int len, |
| 125 | u64 *iv); |
| 126 | |
Sam Ravnborg | 756382c | 2014-05-16 23:26:06 +0200 | [diff] [blame] | 127 | static struct aes_ops aes128_ops = { |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 128 | .encrypt = aes_sparc64_encrypt_128, |
| 129 | .decrypt = aes_sparc64_decrypt_128, |
| 130 | .load_encrypt_keys = aes_sparc64_load_encrypt_keys_128, |
| 131 | .load_decrypt_keys = aes_sparc64_load_decrypt_keys_128, |
| 132 | .ecb_encrypt = aes_sparc64_ecb_encrypt_128, |
| 133 | .ecb_decrypt = aes_sparc64_ecb_decrypt_128, |
| 134 | .cbc_encrypt = aes_sparc64_cbc_encrypt_128, |
| 135 | .cbc_decrypt = aes_sparc64_cbc_decrypt_128, |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 136 | .ctr_crypt = aes_sparc64_ctr_crypt_128, |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 137 | }; |
| 138 | |
Sam Ravnborg | 756382c | 2014-05-16 23:26:06 +0200 | [diff] [blame] | 139 | static struct aes_ops aes192_ops = { |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 140 | .encrypt = aes_sparc64_encrypt_192, |
| 141 | .decrypt = aes_sparc64_decrypt_192, |
| 142 | .load_encrypt_keys = aes_sparc64_load_encrypt_keys_192, |
| 143 | .load_decrypt_keys = aes_sparc64_load_decrypt_keys_192, |
| 144 | .ecb_encrypt = aes_sparc64_ecb_encrypt_192, |
| 145 | .ecb_decrypt = aes_sparc64_ecb_decrypt_192, |
| 146 | .cbc_encrypt = aes_sparc64_cbc_encrypt_192, |
| 147 | .cbc_decrypt = aes_sparc64_cbc_decrypt_192, |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 148 | .ctr_crypt = aes_sparc64_ctr_crypt_192, |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 149 | }; |
| 150 | |
Sam Ravnborg | 756382c | 2014-05-16 23:26:06 +0200 | [diff] [blame] | 151 | static struct aes_ops aes256_ops = { |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 152 | .encrypt = aes_sparc64_encrypt_256, |
| 153 | .decrypt = aes_sparc64_decrypt_256, |
| 154 | .load_encrypt_keys = aes_sparc64_load_encrypt_keys_256, |
| 155 | .load_decrypt_keys = aes_sparc64_load_decrypt_keys_256, |
| 156 | .ecb_encrypt = aes_sparc64_ecb_encrypt_256, |
| 157 | .ecb_decrypt = aes_sparc64_ecb_decrypt_256, |
| 158 | .cbc_encrypt = aes_sparc64_cbc_encrypt_256, |
| 159 | .cbc_decrypt = aes_sparc64_cbc_decrypt_256, |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 160 | .ctr_crypt = aes_sparc64_ctr_crypt_256, |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 161 | }; |
| 162 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 163 | extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key, |
| 164 | unsigned int key_len); |
| 165 | |
| 166 | static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key, |
| 167 | unsigned int key_len) |
| 168 | { |
| 169 | struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 170 | u32 *flags = &tfm->crt_flags; |
| 171 | |
| 172 | switch (key_len) { |
| 173 | case AES_KEYSIZE_128: |
| 174 | ctx->expanded_key_length = 0xb0; |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 175 | ctx->ops = &aes128_ops; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 176 | break; |
| 177 | |
| 178 | case AES_KEYSIZE_192: |
| 179 | ctx->expanded_key_length = 0xd0; |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 180 | ctx->ops = &aes192_ops; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 181 | break; |
| 182 | |
| 183 | case AES_KEYSIZE_256: |
| 184 | ctx->expanded_key_length = 0xf0; |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 185 | ctx->ops = &aes256_ops; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 186 | break; |
| 187 | |
| 188 | default: |
| 189 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 190 | return -EINVAL; |
| 191 | } |
| 192 | |
| 193 | aes_sparc64_key_expand((const u32 *)in_key, &ctx->key[0], key_len); |
| 194 | ctx->key_length = key_len; |
| 195 | |
| 196 | return 0; |
| 197 | } |
| 198 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 199 | static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 200 | { |
| 201 | struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 202 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 203 | ctx->ops->encrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 204 | } |
| 205 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 206 | static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 207 | { |
| 208 | struct crypto_sparc64_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 209 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 210 | ctx->ops->decrypt(&ctx->key[0], (const u32 *) src, (u32 *) dst); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 211 | } |
| 212 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 213 | #define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1)) |
| 214 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 215 | static int ecb_encrypt(struct blkcipher_desc *desc, |
| 216 | struct scatterlist *dst, struct scatterlist *src, |
| 217 | unsigned int nbytes) |
| 218 | { |
| 219 | struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 220 | struct blkcipher_walk walk; |
| 221 | int err; |
| 222 | |
| 223 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 224 | err = blkcipher_walk_virt(desc, &walk); |
David S. Miller | b35d282 | 2012-12-19 15:22:03 -0800 | [diff] [blame] | 225 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 226 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 227 | ctx->ops->load_encrypt_keys(&ctx->key[0]); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 228 | while ((nbytes = walk.nbytes)) { |
| 229 | unsigned int block_len = nbytes & AES_BLOCK_MASK; |
| 230 | |
| 231 | if (likely(block_len)) { |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 232 | ctx->ops->ecb_encrypt(&ctx->key[0], |
| 233 | (const u64 *)walk.src.virt.addr, |
| 234 | (u64 *) walk.dst.virt.addr, |
| 235 | block_len); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 236 | } |
| 237 | nbytes &= AES_BLOCK_SIZE - 1; |
| 238 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 239 | } |
| 240 | fprs_write(0); |
| 241 | return err; |
| 242 | } |
| 243 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 244 | static int ecb_decrypt(struct blkcipher_desc *desc, |
| 245 | struct scatterlist *dst, struct scatterlist *src, |
| 246 | unsigned int nbytes) |
| 247 | { |
| 248 | struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 249 | struct blkcipher_walk walk; |
| 250 | u64 *key_end; |
| 251 | int err; |
| 252 | |
| 253 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 254 | err = blkcipher_walk_virt(desc, &walk); |
David S. Miller | b35d282 | 2012-12-19 15:22:03 -0800 | [diff] [blame] | 255 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 256 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 257 | ctx->ops->load_decrypt_keys(&ctx->key[0]); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 258 | key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)]; |
| 259 | while ((nbytes = walk.nbytes)) { |
| 260 | unsigned int block_len = nbytes & AES_BLOCK_MASK; |
| 261 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 262 | if (likely(block_len)) { |
| 263 | ctx->ops->ecb_decrypt(key_end, |
| 264 | (const u64 *) walk.src.virt.addr, |
| 265 | (u64 *) walk.dst.virt.addr, block_len); |
| 266 | } |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 267 | nbytes &= AES_BLOCK_SIZE - 1; |
| 268 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 269 | } |
| 270 | fprs_write(0); |
| 271 | |
| 272 | return err; |
| 273 | } |
| 274 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 275 | static int cbc_encrypt(struct blkcipher_desc *desc, |
| 276 | struct scatterlist *dst, struct scatterlist *src, |
| 277 | unsigned int nbytes) |
| 278 | { |
| 279 | struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 280 | struct blkcipher_walk walk; |
| 281 | int err; |
| 282 | |
| 283 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 284 | err = blkcipher_walk_virt(desc, &walk); |
David S. Miller | b35d282 | 2012-12-19 15:22:03 -0800 | [diff] [blame] | 285 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 286 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 287 | ctx->ops->load_encrypt_keys(&ctx->key[0]); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 288 | while ((nbytes = walk.nbytes)) { |
| 289 | unsigned int block_len = nbytes & AES_BLOCK_MASK; |
| 290 | |
| 291 | if (likely(block_len)) { |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 292 | ctx->ops->cbc_encrypt(&ctx->key[0], |
| 293 | (const u64 *)walk.src.virt.addr, |
| 294 | (u64 *) walk.dst.virt.addr, |
| 295 | block_len, (u64 *) walk.iv); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 296 | } |
| 297 | nbytes &= AES_BLOCK_SIZE - 1; |
| 298 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 299 | } |
| 300 | fprs_write(0); |
| 301 | return err; |
| 302 | } |
| 303 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 304 | static int cbc_decrypt(struct blkcipher_desc *desc, |
| 305 | struct scatterlist *dst, struct scatterlist *src, |
| 306 | unsigned int nbytes) |
| 307 | { |
| 308 | struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 309 | struct blkcipher_walk walk; |
| 310 | u64 *key_end; |
| 311 | int err; |
| 312 | |
| 313 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 314 | err = blkcipher_walk_virt(desc, &walk); |
David S. Miller | b35d282 | 2012-12-19 15:22:03 -0800 | [diff] [blame] | 315 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 316 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 317 | ctx->ops->load_decrypt_keys(&ctx->key[0]); |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 318 | key_end = &ctx->key[ctx->expanded_key_length / sizeof(u64)]; |
| 319 | while ((nbytes = walk.nbytes)) { |
| 320 | unsigned int block_len = nbytes & AES_BLOCK_MASK; |
| 321 | |
David S. Miller | 0bdcaf7 | 2012-08-29 12:50:16 -0700 | [diff] [blame] | 322 | if (likely(block_len)) { |
| 323 | ctx->ops->cbc_decrypt(key_end, |
| 324 | (const u64 *) walk.src.virt.addr, |
| 325 | (u64 *) walk.dst.virt.addr, |
| 326 | block_len, (u64 *) walk.iv); |
| 327 | } |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 328 | nbytes &= AES_BLOCK_SIZE - 1; |
| 329 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 330 | } |
| 331 | fprs_write(0); |
| 332 | |
| 333 | return err; |
| 334 | } |
| 335 | |
David S. Miller | a8d97ce | 2012-12-19 15:20:23 -0800 | [diff] [blame] | 336 | static void ctr_crypt_final(struct crypto_sparc64_aes_ctx *ctx, |
| 337 | struct blkcipher_walk *walk) |
| 338 | { |
| 339 | u8 *ctrblk = walk->iv; |
| 340 | u64 keystream[AES_BLOCK_SIZE / sizeof(u64)]; |
| 341 | u8 *src = walk->src.virt.addr; |
| 342 | u8 *dst = walk->dst.virt.addr; |
| 343 | unsigned int nbytes = walk->nbytes; |
| 344 | |
| 345 | ctx->ops->ecb_encrypt(&ctx->key[0], (const u64 *)ctrblk, |
| 346 | keystream, AES_BLOCK_SIZE); |
| 347 | crypto_xor((u8 *) keystream, src, nbytes); |
| 348 | memcpy(dst, keystream, nbytes); |
| 349 | crypto_inc(ctrblk, AES_BLOCK_SIZE); |
| 350 | } |
| 351 | |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 352 | static int ctr_crypt(struct blkcipher_desc *desc, |
| 353 | struct scatterlist *dst, struct scatterlist *src, |
| 354 | unsigned int nbytes) |
| 355 | { |
| 356 | struct crypto_sparc64_aes_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 357 | struct blkcipher_walk walk; |
| 358 | int err; |
| 359 | |
| 360 | blkcipher_walk_init(&walk, dst, src, nbytes); |
David S. Miller | a8d97ce | 2012-12-19 15:20:23 -0800 | [diff] [blame] | 361 | err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE); |
| 362 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 363 | |
| 364 | ctx->ops->load_encrypt_keys(&ctx->key[0]); |
David S. Miller | a8d97ce | 2012-12-19 15:20:23 -0800 | [diff] [blame] | 365 | while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 366 | unsigned int block_len = nbytes & AES_BLOCK_MASK; |
| 367 | |
| 368 | if (likely(block_len)) { |
| 369 | ctx->ops->ctr_crypt(&ctx->key[0], |
| 370 | (const u64 *)walk.src.virt.addr, |
| 371 | (u64 *) walk.dst.virt.addr, |
| 372 | block_len, (u64 *) walk.iv); |
| 373 | } |
| 374 | nbytes &= AES_BLOCK_SIZE - 1; |
| 375 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 376 | } |
David S. Miller | a8d97ce | 2012-12-19 15:20:23 -0800 | [diff] [blame] | 377 | if (walk.nbytes) { |
| 378 | ctr_crypt_final(ctx, &walk); |
| 379 | err = blkcipher_walk_done(desc, &walk, 0); |
| 380 | } |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 381 | fprs_write(0); |
| 382 | return err; |
| 383 | } |
| 384 | |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 385 | static struct crypto_alg algs[] = { { |
| 386 | .cra_name = "aes", |
| 387 | .cra_driver_name = "aes-sparc64", |
David S. Miller | 1080362 | 2012-09-15 09:06:30 -0700 | [diff] [blame] | 388 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 389 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 390 | .cra_blocksize = AES_BLOCK_SIZE, |
| 391 | .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx), |
| 392 | .cra_alignmask = 3, |
| 393 | .cra_module = THIS_MODULE, |
| 394 | .cra_u = { |
| 395 | .cipher = { |
| 396 | .cia_min_keysize = AES_MIN_KEY_SIZE, |
| 397 | .cia_max_keysize = AES_MAX_KEY_SIZE, |
| 398 | .cia_setkey = aes_set_key, |
| 399 | .cia_encrypt = aes_encrypt, |
| 400 | .cia_decrypt = aes_decrypt |
| 401 | } |
| 402 | } |
| 403 | }, { |
| 404 | .cra_name = "ecb(aes)", |
| 405 | .cra_driver_name = "ecb-aes-sparc64", |
David S. Miller | 1080362 | 2012-09-15 09:06:30 -0700 | [diff] [blame] | 406 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 407 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 408 | .cra_blocksize = AES_BLOCK_SIZE, |
| 409 | .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx), |
| 410 | .cra_alignmask = 7, |
| 411 | .cra_type = &crypto_blkcipher_type, |
| 412 | .cra_module = THIS_MODULE, |
| 413 | .cra_u = { |
| 414 | .blkcipher = { |
| 415 | .min_keysize = AES_MIN_KEY_SIZE, |
| 416 | .max_keysize = AES_MAX_KEY_SIZE, |
| 417 | .setkey = aes_set_key, |
| 418 | .encrypt = ecb_encrypt, |
| 419 | .decrypt = ecb_decrypt, |
| 420 | }, |
| 421 | }, |
| 422 | }, { |
| 423 | .cra_name = "cbc(aes)", |
| 424 | .cra_driver_name = "cbc-aes-sparc64", |
David S. Miller | 1080362 | 2012-09-15 09:06:30 -0700 | [diff] [blame] | 425 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 426 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 427 | .cra_blocksize = AES_BLOCK_SIZE, |
| 428 | .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx), |
| 429 | .cra_alignmask = 7, |
| 430 | .cra_type = &crypto_blkcipher_type, |
| 431 | .cra_module = THIS_MODULE, |
| 432 | .cra_u = { |
| 433 | .blkcipher = { |
| 434 | .min_keysize = AES_MIN_KEY_SIZE, |
| 435 | .max_keysize = AES_MAX_KEY_SIZE, |
| 436 | .setkey = aes_set_key, |
| 437 | .encrypt = cbc_encrypt, |
| 438 | .decrypt = cbc_decrypt, |
| 439 | }, |
| 440 | }, |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 441 | }, { |
| 442 | .cra_name = "ctr(aes)", |
| 443 | .cra_driver_name = "ctr-aes-sparc64", |
David S. Miller | 1080362 | 2012-09-15 09:06:30 -0700 | [diff] [blame] | 444 | .cra_priority = SPARC_CR_OPCODE_PRIORITY, |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 445 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
David S. Miller | a8d97ce | 2012-12-19 15:20:23 -0800 | [diff] [blame] | 446 | .cra_blocksize = 1, |
David S. Miller | 9fd130e | 2012-08-29 14:49:23 -0700 | [diff] [blame] | 447 | .cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx), |
| 448 | .cra_alignmask = 7, |
| 449 | .cra_type = &crypto_blkcipher_type, |
| 450 | .cra_module = THIS_MODULE, |
| 451 | .cra_u = { |
| 452 | .blkcipher = { |
| 453 | .min_keysize = AES_MIN_KEY_SIZE, |
| 454 | .max_keysize = AES_MAX_KEY_SIZE, |
| 455 | .setkey = aes_set_key, |
| 456 | .encrypt = ctr_crypt, |
| 457 | .decrypt = ctr_crypt, |
| 458 | }, |
| 459 | }, |
David S. Miller | 9bf4852 | 2012-08-21 03:58:13 -0700 | [diff] [blame] | 460 | } }; |
| 461 | |
| 462 | static bool __init sparc64_has_aes_opcode(void) |
| 463 | { |
| 464 | unsigned long cfr; |
| 465 | |
| 466 | if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO)) |
| 467 | return false; |
| 468 | |
| 469 | __asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); |
| 470 | if (!(cfr & CFR_AES)) |
| 471 | return false; |
| 472 | |
| 473 | return true; |
| 474 | } |
| 475 | |
| 476 | static int __init aes_sparc64_mod_init(void) |
| 477 | { |
| 478 | int i; |
| 479 | |
| 480 | for (i = 0; i < ARRAY_SIZE(algs); i++) |
| 481 | INIT_LIST_HEAD(&algs[i].cra_list); |
| 482 | |
| 483 | if (sparc64_has_aes_opcode()) { |
| 484 | pr_info("Using sparc64 aes opcodes optimized AES implementation\n"); |
| 485 | return crypto_register_algs(algs, ARRAY_SIZE(algs)); |
| 486 | } |
| 487 | pr_info("sparc64 aes opcodes not available.\n"); |
| 488 | return -ENODEV; |
| 489 | } |
| 490 | |
| 491 | static void __exit aes_sparc64_mod_fini(void) |
| 492 | { |
| 493 | crypto_unregister_algs(algs, ARRAY_SIZE(algs)); |
| 494 | } |
| 495 | |
| 496 | module_init(aes_sparc64_mod_init); |
| 497 | module_exit(aes_sparc64_mod_fini); |
| 498 | |
| 499 | MODULE_LICENSE("GPL"); |
| 500 | MODULE_DESCRIPTION("AES Secure Hash Algorithm, sparc64 aes opcode accelerated"); |
| 501 | |
| 502 | MODULE_ALIAS("aes"); |
David S. Miller | 226f7ce | 2012-11-09 20:53:32 -0800 | [diff] [blame] | 503 | |
| 504 | #include "crop_devid.c" |