Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 1 | |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 2 | #include <linux/ceph/ceph_debug.h> |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 3 | |
| 4 | #include <linux/err.h> |
| 5 | #include <linux/scatterlist.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 6 | #include <linux/slab.h> |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 7 | #include <crypto/hash.h> |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 8 | #include <linux/key-type.h> |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 9 | |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 10 | #include <keys/ceph-type.h> |
David Howells | 7c3bec0 | 2014-07-18 18:56:35 +0100 | [diff] [blame] | 11 | #include <keys/user-type.h> |
Yehuda Sadeh | 3d14c5d | 2010-04-06 15:14:15 -0700 | [diff] [blame] | 12 | #include <linux/ceph/decode.h> |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 13 | #include "crypto.h" |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 14 | |
Tommi Virtanen | 8323c3a | 2011-03-25 16:32:57 -0700 | [diff] [blame] | 15 | int ceph_crypto_key_clone(struct ceph_crypto_key *dst, |
| 16 | const struct ceph_crypto_key *src) |
| 17 | { |
| 18 | memcpy(dst, src, sizeof(struct ceph_crypto_key)); |
Thomas Meyer | 1864825 | 2011-11-10 19:45:21 +0100 | [diff] [blame] | 19 | dst->key = kmemdup(src->key, src->len, GFP_NOFS); |
Tommi Virtanen | 8323c3a | 2011-03-25 16:32:57 -0700 | [diff] [blame] | 20 | if (!dst->key) |
| 21 | return -ENOMEM; |
Tommi Virtanen | 8323c3a | 2011-03-25 16:32:57 -0700 | [diff] [blame] | 22 | return 0; |
| 23 | } |
| 24 | |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 25 | int ceph_crypto_key_encode(struct ceph_crypto_key *key, void **p, void *end) |
| 26 | { |
| 27 | if (*p + sizeof(u16) + sizeof(key->created) + |
| 28 | sizeof(u16) + key->len > end) |
| 29 | return -ERANGE; |
| 30 | ceph_encode_16(p, key->type); |
| 31 | ceph_encode_copy(p, &key->created, sizeof(key->created)); |
| 32 | ceph_encode_16(p, key->len); |
| 33 | ceph_encode_copy(p, key->key, key->len); |
| 34 | return 0; |
| 35 | } |
| 36 | |
| 37 | int ceph_crypto_key_decode(struct ceph_crypto_key *key, void **p, void *end) |
| 38 | { |
| 39 | ceph_decode_need(p, end, 2*sizeof(u16) + sizeof(key->created), bad); |
| 40 | key->type = ceph_decode_16(p); |
| 41 | ceph_decode_copy(p, &key->created, sizeof(key->created)); |
| 42 | key->len = ceph_decode_16(p); |
| 43 | ceph_decode_need(p, end, key->len, bad); |
| 44 | key->key = kmalloc(key->len, GFP_NOFS); |
| 45 | if (!key->key) |
| 46 | return -ENOMEM; |
| 47 | ceph_decode_copy(p, key->key, key->len); |
| 48 | return 0; |
| 49 | |
| 50 | bad: |
| 51 | dout("failed to decode crypto key\n"); |
| 52 | return -EINVAL; |
| 53 | } |
| 54 | |
| 55 | int ceph_crypto_key_unarmor(struct ceph_crypto_key *key, const char *inkey) |
| 56 | { |
| 57 | int inlen = strlen(inkey); |
| 58 | int blen = inlen * 3 / 4; |
| 59 | void *buf, *p; |
| 60 | int ret; |
| 61 | |
| 62 | dout("crypto_key_unarmor %s\n", inkey); |
| 63 | buf = kmalloc(blen, GFP_NOFS); |
| 64 | if (!buf) |
| 65 | return -ENOMEM; |
| 66 | blen = ceph_unarmor(buf, inkey, inkey+inlen); |
| 67 | if (blen < 0) { |
| 68 | kfree(buf); |
| 69 | return blen; |
| 70 | } |
| 71 | |
| 72 | p = buf; |
| 73 | ret = ceph_crypto_key_decode(key, &p, p + blen); |
| 74 | kfree(buf); |
| 75 | if (ret) |
| 76 | return ret; |
| 77 | dout("crypto_key_unarmor key %p type %d len %d\n", key, |
| 78 | key->type, key->len); |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | |
| 83 | |
| 84 | #define AES_KEY_SIZE 16 |
| 85 | |
| 86 | static struct crypto_blkcipher *ceph_crypto_alloc_cipher(void) |
| 87 | { |
| 88 | return crypto_alloc_blkcipher("cbc(aes)", 0, CRYPTO_ALG_ASYNC); |
| 89 | } |
| 90 | |
Sage Weil | cbbfe49 | 2010-08-02 15:48:23 -0700 | [diff] [blame] | 91 | static const u8 *aes_iv = (u8 *)CEPH_AES_IV; |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 92 | |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 93 | static int ceph_aes_encrypt(const void *key, int key_len, |
| 94 | void *dst, size_t *dst_len, |
| 95 | const void *src, size_t src_len) |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 96 | { |
| 97 | struct scatterlist sg_in[2], sg_out[1]; |
| 98 | struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); |
| 99 | struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 }; |
| 100 | int ret; |
| 101 | void *iv; |
| 102 | int ivsize; |
| 103 | size_t zero_padding = (0x10 - (src_len & 0x0f)); |
| 104 | char pad[16]; |
| 105 | |
| 106 | if (IS_ERR(tfm)) |
| 107 | return PTR_ERR(tfm); |
| 108 | |
| 109 | memset(pad, zero_padding, zero_padding); |
| 110 | |
| 111 | *dst_len = src_len + zero_padding; |
| 112 | |
| 113 | crypto_blkcipher_setkey((void *)tfm, key, key_len); |
| 114 | sg_init_table(sg_in, 2); |
| 115 | sg_set_buf(&sg_in[0], src, src_len); |
| 116 | sg_set_buf(&sg_in[1], pad, zero_padding); |
| 117 | sg_init_table(sg_out, 1); |
| 118 | sg_set_buf(sg_out, dst, *dst_len); |
| 119 | iv = crypto_blkcipher_crt(tfm)->iv; |
| 120 | ivsize = crypto_blkcipher_ivsize(tfm); |
| 121 | |
| 122 | memcpy(iv, aes_iv, ivsize); |
| 123 | /* |
| 124 | print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1, |
| 125 | key, key_len, 1); |
| 126 | print_hex_dump(KERN_ERR, "enc src: ", DUMP_PREFIX_NONE, 16, 1, |
| 127 | src, src_len, 1); |
| 128 | print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1, |
| 129 | pad, zero_padding, 1); |
| 130 | */ |
| 131 | ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in, |
| 132 | src_len + zero_padding); |
| 133 | crypto_free_blkcipher(tfm); |
| 134 | if (ret < 0) |
| 135 | pr_err("ceph_aes_crypt failed %d\n", ret); |
| 136 | /* |
| 137 | print_hex_dump(KERN_ERR, "enc out: ", DUMP_PREFIX_NONE, 16, 1, |
| 138 | dst, *dst_len, 1); |
| 139 | */ |
| 140 | return 0; |
| 141 | } |
| 142 | |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 143 | static int ceph_aes_encrypt2(const void *key, int key_len, void *dst, |
| 144 | size_t *dst_len, |
| 145 | const void *src1, size_t src1_len, |
| 146 | const void *src2, size_t src2_len) |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 147 | { |
| 148 | struct scatterlist sg_in[3], sg_out[1]; |
| 149 | struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); |
| 150 | struct blkcipher_desc desc = { .tfm = tfm, .flags = 0 }; |
| 151 | int ret; |
| 152 | void *iv; |
| 153 | int ivsize; |
| 154 | size_t zero_padding = (0x10 - ((src1_len + src2_len) & 0x0f)); |
| 155 | char pad[16]; |
| 156 | |
| 157 | if (IS_ERR(tfm)) |
| 158 | return PTR_ERR(tfm); |
| 159 | |
| 160 | memset(pad, zero_padding, zero_padding); |
| 161 | |
| 162 | *dst_len = src1_len + src2_len + zero_padding; |
| 163 | |
| 164 | crypto_blkcipher_setkey((void *)tfm, key, key_len); |
| 165 | sg_init_table(sg_in, 3); |
| 166 | sg_set_buf(&sg_in[0], src1, src1_len); |
| 167 | sg_set_buf(&sg_in[1], src2, src2_len); |
| 168 | sg_set_buf(&sg_in[2], pad, zero_padding); |
| 169 | sg_init_table(sg_out, 1); |
| 170 | sg_set_buf(sg_out, dst, *dst_len); |
| 171 | iv = crypto_blkcipher_crt(tfm)->iv; |
| 172 | ivsize = crypto_blkcipher_ivsize(tfm); |
| 173 | |
| 174 | memcpy(iv, aes_iv, ivsize); |
| 175 | /* |
| 176 | print_hex_dump(KERN_ERR, "enc key: ", DUMP_PREFIX_NONE, 16, 1, |
| 177 | key, key_len, 1); |
| 178 | print_hex_dump(KERN_ERR, "enc src1: ", DUMP_PREFIX_NONE, 16, 1, |
| 179 | src1, src1_len, 1); |
| 180 | print_hex_dump(KERN_ERR, "enc src2: ", DUMP_PREFIX_NONE, 16, 1, |
| 181 | src2, src2_len, 1); |
| 182 | print_hex_dump(KERN_ERR, "enc pad: ", DUMP_PREFIX_NONE, 16, 1, |
| 183 | pad, zero_padding, 1); |
| 184 | */ |
| 185 | ret = crypto_blkcipher_encrypt(&desc, sg_out, sg_in, |
| 186 | src1_len + src2_len + zero_padding); |
| 187 | crypto_free_blkcipher(tfm); |
| 188 | if (ret < 0) |
| 189 | pr_err("ceph_aes_crypt2 failed %d\n", ret); |
| 190 | /* |
| 191 | print_hex_dump(KERN_ERR, "enc out: ", DUMP_PREFIX_NONE, 16, 1, |
| 192 | dst, *dst_len, 1); |
| 193 | */ |
| 194 | return 0; |
| 195 | } |
| 196 | |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 197 | static int ceph_aes_decrypt(const void *key, int key_len, |
| 198 | void *dst, size_t *dst_len, |
| 199 | const void *src, size_t src_len) |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 200 | { |
| 201 | struct scatterlist sg_in[1], sg_out[2]; |
| 202 | struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); |
| 203 | struct blkcipher_desc desc = { .tfm = tfm }; |
| 204 | char pad[16]; |
| 205 | void *iv; |
| 206 | int ivsize; |
| 207 | int ret; |
| 208 | int last_byte; |
| 209 | |
| 210 | if (IS_ERR(tfm)) |
| 211 | return PTR_ERR(tfm); |
| 212 | |
| 213 | crypto_blkcipher_setkey((void *)tfm, key, key_len); |
| 214 | sg_init_table(sg_in, 1); |
| 215 | sg_init_table(sg_out, 2); |
| 216 | sg_set_buf(sg_in, src, src_len); |
| 217 | sg_set_buf(&sg_out[0], dst, *dst_len); |
| 218 | sg_set_buf(&sg_out[1], pad, sizeof(pad)); |
| 219 | |
| 220 | iv = crypto_blkcipher_crt(tfm)->iv; |
| 221 | ivsize = crypto_blkcipher_ivsize(tfm); |
| 222 | |
| 223 | memcpy(iv, aes_iv, ivsize); |
| 224 | |
| 225 | /* |
| 226 | print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1, |
| 227 | key, key_len, 1); |
| 228 | print_hex_dump(KERN_ERR, "dec in: ", DUMP_PREFIX_NONE, 16, 1, |
| 229 | src, src_len, 1); |
| 230 | */ |
| 231 | |
| 232 | ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len); |
| 233 | crypto_free_blkcipher(tfm); |
| 234 | if (ret < 0) { |
| 235 | pr_err("ceph_aes_decrypt failed %d\n", ret); |
| 236 | return ret; |
| 237 | } |
| 238 | |
| 239 | if (src_len <= *dst_len) |
| 240 | last_byte = ((char *)dst)[src_len - 1]; |
| 241 | else |
| 242 | last_byte = pad[src_len - *dst_len - 1]; |
| 243 | if (last_byte <= 16 && src_len >= last_byte) { |
| 244 | *dst_len = src_len - last_byte; |
| 245 | } else { |
| 246 | pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n", |
| 247 | last_byte, (int)src_len); |
| 248 | return -EPERM; /* bad padding */ |
| 249 | } |
| 250 | /* |
| 251 | print_hex_dump(KERN_ERR, "dec out: ", DUMP_PREFIX_NONE, 16, 1, |
| 252 | dst, *dst_len, 1); |
| 253 | */ |
| 254 | return 0; |
| 255 | } |
| 256 | |
Yehuda Sadeh | cd84db6 | 2010-06-11 16:58:48 -0700 | [diff] [blame] | 257 | static int ceph_aes_decrypt2(const void *key, int key_len, |
| 258 | void *dst1, size_t *dst1_len, |
| 259 | void *dst2, size_t *dst2_len, |
| 260 | const void *src, size_t src_len) |
Sage Weil | 8b6e4f2 | 2010-02-02 16:07:07 -0800 | [diff] [blame] | 261 | { |
| 262 | struct scatterlist sg_in[1], sg_out[3]; |
| 263 | struct crypto_blkcipher *tfm = ceph_crypto_alloc_cipher(); |
| 264 | struct blkcipher_desc desc = { .tfm = tfm }; |
| 265 | char pad[16]; |
| 266 | void *iv; |
| 267 | int ivsize; |
| 268 | int ret; |
| 269 | int last_byte; |
| 270 | |
| 271 | if (IS_ERR(tfm)) |
| 272 | return PTR_ERR(tfm); |
| 273 | |
| 274 | sg_init_table(sg_in, 1); |
| 275 | sg_set_buf(sg_in, src, src_len); |
| 276 | sg_init_table(sg_out, 3); |
| 277 | sg_set_buf(&sg_out[0], dst1, *dst1_len); |
| 278 | sg_set_buf(&sg_out[1], dst2, *dst2_len); |
| 279 | sg_set_buf(&sg_out[2], pad, sizeof(pad)); |
| 280 | |
| 281 | crypto_blkcipher_setkey((void *)tfm, key, key_len); |
| 282 | iv = crypto_blkcipher_crt(tfm)->iv; |
| 283 | ivsize = crypto_blkcipher_ivsize(tfm); |
| 284 | |
| 285 | memcpy(iv, aes_iv, ivsize); |
| 286 | |
| 287 | /* |
| 288 | print_hex_dump(KERN_ERR, "dec key: ", DUMP_PREFIX_NONE, 16, 1, |
| 289 | key, key_len, 1); |
| 290 | print_hex_dump(KERN_ERR, "dec in: ", DUMP_PREFIX_NONE, 16, 1, |
| 291 | src, src_len, 1); |
| 292 | */ |
| 293 | |
| 294 | ret = crypto_blkcipher_decrypt(&desc, sg_out, sg_in, src_len); |
| 295 | crypto_free_blkcipher(tfm); |
| 296 | if (ret < 0) { |
| 297 | pr_err("ceph_aes_decrypt failed %d\n", ret); |
| 298 | return ret; |
| 299 | } |
| 300 | |
| 301 | if (src_len <= *dst1_len) |
| 302 | last_byte = ((char *)dst1)[src_len - 1]; |
| 303 | else if (src_len <= *dst1_len + *dst2_len) |
| 304 | last_byte = ((char *)dst2)[src_len - *dst1_len - 1]; |
| 305 | else |
| 306 | last_byte = pad[src_len - *dst1_len - *dst2_len - 1]; |
| 307 | if (last_byte <= 16 && src_len >= last_byte) { |
| 308 | src_len -= last_byte; |
| 309 | } else { |
| 310 | pr_err("ceph_aes_decrypt got bad padding %d on src len %d\n", |
| 311 | last_byte, (int)src_len); |
| 312 | return -EPERM; /* bad padding */ |
| 313 | } |
| 314 | |
| 315 | if (src_len < *dst1_len) { |
| 316 | *dst1_len = src_len; |
| 317 | *dst2_len = 0; |
| 318 | } else { |
| 319 | *dst2_len = src_len - *dst1_len; |
| 320 | } |
| 321 | /* |
| 322 | print_hex_dump(KERN_ERR, "dec out1: ", DUMP_PREFIX_NONE, 16, 1, |
| 323 | dst1, *dst1_len, 1); |
| 324 | print_hex_dump(KERN_ERR, "dec out2: ", DUMP_PREFIX_NONE, 16, 1, |
| 325 | dst2, *dst2_len, 1); |
| 326 | */ |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | |
| 332 | int ceph_decrypt(struct ceph_crypto_key *secret, void *dst, size_t *dst_len, |
| 333 | const void *src, size_t src_len) |
| 334 | { |
| 335 | switch (secret->type) { |
| 336 | case CEPH_CRYPTO_NONE: |
| 337 | if (*dst_len < src_len) |
| 338 | return -ERANGE; |
| 339 | memcpy(dst, src, src_len); |
| 340 | *dst_len = src_len; |
| 341 | return 0; |
| 342 | |
| 343 | case CEPH_CRYPTO_AES: |
| 344 | return ceph_aes_decrypt(secret->key, secret->len, dst, |
| 345 | dst_len, src, src_len); |
| 346 | |
| 347 | default: |
| 348 | return -EINVAL; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | int ceph_decrypt2(struct ceph_crypto_key *secret, |
| 353 | void *dst1, size_t *dst1_len, |
| 354 | void *dst2, size_t *dst2_len, |
| 355 | const void *src, size_t src_len) |
| 356 | { |
| 357 | size_t t; |
| 358 | |
| 359 | switch (secret->type) { |
| 360 | case CEPH_CRYPTO_NONE: |
| 361 | if (*dst1_len + *dst2_len < src_len) |
| 362 | return -ERANGE; |
| 363 | t = min(*dst1_len, src_len); |
| 364 | memcpy(dst1, src, t); |
| 365 | *dst1_len = t; |
| 366 | src += t; |
| 367 | src_len -= t; |
| 368 | if (src_len) { |
| 369 | t = min(*dst2_len, src_len); |
| 370 | memcpy(dst2, src, t); |
| 371 | *dst2_len = t; |
| 372 | } |
| 373 | return 0; |
| 374 | |
| 375 | case CEPH_CRYPTO_AES: |
| 376 | return ceph_aes_decrypt2(secret->key, secret->len, |
| 377 | dst1, dst1_len, dst2, dst2_len, |
| 378 | src, src_len); |
| 379 | |
| 380 | default: |
| 381 | return -EINVAL; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | int ceph_encrypt(struct ceph_crypto_key *secret, void *dst, size_t *dst_len, |
| 386 | const void *src, size_t src_len) |
| 387 | { |
| 388 | switch (secret->type) { |
| 389 | case CEPH_CRYPTO_NONE: |
| 390 | if (*dst_len < src_len) |
| 391 | return -ERANGE; |
| 392 | memcpy(dst, src, src_len); |
| 393 | *dst_len = src_len; |
| 394 | return 0; |
| 395 | |
| 396 | case CEPH_CRYPTO_AES: |
| 397 | return ceph_aes_encrypt(secret->key, secret->len, dst, |
| 398 | dst_len, src, src_len); |
| 399 | |
| 400 | default: |
| 401 | return -EINVAL; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | int ceph_encrypt2(struct ceph_crypto_key *secret, void *dst, size_t *dst_len, |
| 406 | const void *src1, size_t src1_len, |
| 407 | const void *src2, size_t src2_len) |
| 408 | { |
| 409 | switch (secret->type) { |
| 410 | case CEPH_CRYPTO_NONE: |
| 411 | if (*dst_len < src1_len + src2_len) |
| 412 | return -ERANGE; |
| 413 | memcpy(dst, src1, src1_len); |
| 414 | memcpy(dst + src1_len, src2, src2_len); |
| 415 | *dst_len = src1_len + src2_len; |
| 416 | return 0; |
| 417 | |
| 418 | case CEPH_CRYPTO_AES: |
| 419 | return ceph_aes_encrypt2(secret->key, secret->len, dst, dst_len, |
| 420 | src1, src1_len, src2, src2_len); |
| 421 | |
| 422 | default: |
| 423 | return -EINVAL; |
| 424 | } |
| 425 | } |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 426 | |
David Howells | efa64c0 | 2014-07-18 18:56:35 +0100 | [diff] [blame] | 427 | static int ceph_key_preparse(struct key_preparsed_payload *prep) |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 428 | { |
| 429 | struct ceph_crypto_key *ckey; |
David Howells | cf7f601 | 2012-09-13 13:06:29 +0100 | [diff] [blame] | 430 | size_t datalen = prep->datalen; |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 431 | int ret; |
| 432 | void *p; |
| 433 | |
| 434 | ret = -EINVAL; |
David Howells | cf7f601 | 2012-09-13 13:06:29 +0100 | [diff] [blame] | 435 | if (datalen <= 0 || datalen > 32767 || !prep->data) |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 436 | goto err; |
| 437 | |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 438 | ret = -ENOMEM; |
| 439 | ckey = kmalloc(sizeof(*ckey), GFP_KERNEL); |
| 440 | if (!ckey) |
| 441 | goto err; |
| 442 | |
| 443 | /* TODO ceph_crypto_key_decode should really take const input */ |
David Howells | cf7f601 | 2012-09-13 13:06:29 +0100 | [diff] [blame] | 444 | p = (void *)prep->data; |
| 445 | ret = ceph_crypto_key_decode(ckey, &p, (char*)prep->data+datalen); |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 446 | if (ret < 0) |
| 447 | goto err_ckey; |
| 448 | |
David Howells | efa64c0 | 2014-07-18 18:56:35 +0100 | [diff] [blame] | 449 | prep->payload[0] = ckey; |
| 450 | prep->quotalen = datalen; |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 451 | return 0; |
| 452 | |
| 453 | err_ckey: |
| 454 | kfree(ckey); |
| 455 | err: |
| 456 | return ret; |
| 457 | } |
| 458 | |
David Howells | efa64c0 | 2014-07-18 18:56:35 +0100 | [diff] [blame] | 459 | static void ceph_key_free_preparse(struct key_preparsed_payload *prep) |
| 460 | { |
| 461 | struct ceph_crypto_key *ckey = prep->payload[0]; |
| 462 | ceph_crypto_key_destroy(ckey); |
| 463 | kfree(ckey); |
| 464 | } |
| 465 | |
David Howells | efa64c0 | 2014-07-18 18:56:35 +0100 | [diff] [blame] | 466 | static void ceph_key_destroy(struct key *key) |
| 467 | { |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 468 | struct ceph_crypto_key *ckey = key->payload.data; |
| 469 | |
| 470 | ceph_crypto_key_destroy(ckey); |
Sylvain Munaut | f0666b1 | 2012-08-02 09:12:59 -0700 | [diff] [blame] | 471 | kfree(ckey); |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | struct key_type key_type_ceph = { |
| 475 | .name = "ceph", |
David Howells | efa64c0 | 2014-07-18 18:56:35 +0100 | [diff] [blame] | 476 | .preparse = ceph_key_preparse, |
| 477 | .free_preparse = ceph_key_free_preparse, |
| 478 | .instantiate = generic_key_instantiate, |
Tommi Virtanen | 4b2a58a | 2011-03-28 14:59:38 -0700 | [diff] [blame] | 479 | .destroy = ceph_key_destroy, |
| 480 | }; |
| 481 | |
| 482 | int ceph_crypto_init(void) { |
| 483 | return register_key_type(&key_type_ceph); |
| 484 | } |
| 485 | |
| 486 | void ceph_crypto_shutdown(void) { |
| 487 | unregister_key_type(&key_type_ceph); |
| 488 | } |