1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * RSA padding templates. 4 * 5 * Copyright (c) 2015 Intel Corporation 6 */ 7 8 #include <crypto/algapi.h> 9 #include <crypto/akcipher.h> 10 #include <crypto/internal/akcipher.h> 11 #include <crypto/internal/rsa.h> 12 #include <linux/err.h> 13 #include <linux/init.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/random.h> 17 #include <linux/scatterlist.h> 18 19 /* 20 * Hash algorithm OIDs plus ASN.1 DER wrappings [RFC4880 sec 5.2.2]. 21 */ 22 static const u8 rsa_digest_info_md5[] = { 23 0x30, 0x20, 0x30, 0x0c, 0x06, 0x08, 24 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, /* OID */ 25 0x05, 0x00, 0x04, 0x10 26 }; 27 28 static const u8 rsa_digest_info_sha1[] = { 29 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 30 0x2b, 0x0e, 0x03, 0x02, 0x1a, 31 0x05, 0x00, 0x04, 0x14 32 }; 33 34 static const u8 rsa_digest_info_rmd160[] = { 35 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 36 0x2b, 0x24, 0x03, 0x02, 0x01, 37 0x05, 0x00, 0x04, 0x14 38 }; 39 40 static const u8 rsa_digest_info_sha224[] = { 41 0x30, 0x2d, 0x30, 0x0d, 0x06, 0x09, 42 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04, 43 0x05, 0x00, 0x04, 0x1c 44 }; 45 46 static const u8 rsa_digest_info_sha256[] = { 47 0x30, 0x31, 0x30, 0x0d, 0x06, 0x09, 48 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 49 0x05, 0x00, 0x04, 0x20 50 }; 51 52 static const u8 rsa_digest_info_sha384[] = { 53 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 54 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 55 0x05, 0x00, 0x04, 0x30 56 }; 57 58 static const u8 rsa_digest_info_sha512[] = { 59 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 60 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 61 0x05, 0x00, 0x04, 0x40 62 }; 63 64 static const struct rsa_asn1_template { 65 const char *name; 66 const u8 *data; 67 size_t size; 68 } rsa_asn1_templates[] = { 69 #define _(X) { #X, rsa_digest_info_##X, sizeof(rsa_digest_info_##X) } 70 _(md5), 71 _(sha1), 72 _(rmd160), 73 _(sha256), 74 _(sha384), 75 _(sha512), 76 _(sha224), 77 { NULL } 78 #undef _ 79 }; 80 81 static const struct rsa_asn1_template *rsa_lookup_asn1(const char *name) 82 { 83 const struct rsa_asn1_template *p; 84 85 for (p = rsa_asn1_templates; p->name; p++) 86 if (strcmp(name, p->name) == 0) 87 return p; 88 return NULL; 89 } 90 91 struct pkcs1pad_ctx { 92 struct crypto_akcipher *child; 93 unsigned int key_size; 94 }; 95 96 struct pkcs1pad_inst_ctx { 97 struct crypto_akcipher_spawn spawn; 98 const struct rsa_asn1_template *digest_info; 99 }; 100 101 struct pkcs1pad_request { 102 struct scatterlist in_sg[2], out_sg[1]; 103 uint8_t *in_buf, *out_buf; 104 struct akcipher_request child_req; 105 }; 106 107 static int pkcs1pad_set_pub_key(struct crypto_akcipher *tfm, const void *key, 108 unsigned int keylen) 109 { 110 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 111 int err; 112 113 ctx->key_size = 0; 114 115 err = crypto_akcipher_set_pub_key(ctx->child, key, keylen); 116 if (err) 117 return err; 118 119 /* Find out new modulus size from rsa implementation */ 120 err = crypto_akcipher_maxsize(ctx->child); 121 if (err > PAGE_SIZE) 122 return -ENOTSUPP; 123 124 ctx->key_size = err; 125 return 0; 126 } 127 128 static int pkcs1pad_set_priv_key(struct crypto_akcipher *tfm, const void *key, 129 unsigned int keylen) 130 { 131 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 132 int err; 133 134 ctx->key_size = 0; 135 136 err = crypto_akcipher_set_priv_key(ctx->child, key, keylen); 137 if (err) 138 return err; 139 140 /* Find out new modulus size from rsa implementation */ 141 err = crypto_akcipher_maxsize(ctx->child); 142 if (err > PAGE_SIZE) 143 return -ENOTSUPP; 144 145 ctx->key_size = err; 146 return 0; 147 } 148 149 static unsigned int pkcs1pad_get_max_size(struct crypto_akcipher *tfm) 150 { 151 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 152 153 /* 154 * The maximum destination buffer size for the encrypt/sign operations 155 * will be the same as for RSA, even though it's smaller for 156 * decrypt/verify. 157 */ 158 159 return ctx->key_size; 160 } 161 162 static void pkcs1pad_sg_set_buf(struct scatterlist *sg, void *buf, size_t len, 163 struct scatterlist *next) 164 { 165 int nsegs = next ? 2 : 1; 166 167 sg_init_table(sg, nsegs); 168 sg_set_buf(sg, buf, len); 169 170 if (next) 171 sg_chain(sg, nsegs, next); 172 } 173 174 static int pkcs1pad_encrypt_sign_complete(struct akcipher_request *req, int err) 175 { 176 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 177 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 178 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 179 unsigned int pad_len; 180 unsigned int len; 181 u8 *out_buf; 182 183 if (err) 184 goto out; 185 186 len = req_ctx->child_req.dst_len; 187 pad_len = ctx->key_size - len; 188 189 /* Four billion to one */ 190 if (likely(!pad_len)) 191 goto out; 192 193 out_buf = kzalloc(ctx->key_size, GFP_ATOMIC); 194 err = -ENOMEM; 195 if (!out_buf) 196 goto out; 197 198 sg_copy_to_buffer(req->dst, sg_nents_for_len(req->dst, len), 199 out_buf + pad_len, len); 200 sg_copy_from_buffer(req->dst, 201 sg_nents_for_len(req->dst, ctx->key_size), 202 out_buf, ctx->key_size); 203 kfree_sensitive(out_buf); 204 205 out: 206 req->dst_len = ctx->key_size; 207 208 kfree(req_ctx->in_buf); 209 210 return err; 211 } 212 213 static void pkcs1pad_encrypt_sign_complete_cb( 214 struct crypto_async_request *child_async_req, int err) 215 { 216 struct akcipher_request *req = child_async_req->data; 217 218 if (err == -EINPROGRESS) 219 goto out; 220 221 err = pkcs1pad_encrypt_sign_complete(req, err); 222 223 out: 224 akcipher_request_complete(req, err); 225 } 226 227 static int pkcs1pad_encrypt(struct akcipher_request *req) 228 { 229 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 230 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 231 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 232 int err; 233 unsigned int i, ps_end; 234 235 if (!ctx->key_size) 236 return -EINVAL; 237 238 if (req->src_len > ctx->key_size - 11) 239 return -EOVERFLOW; 240 241 if (req->dst_len < ctx->key_size) { 242 req->dst_len = ctx->key_size; 243 return -EOVERFLOW; 244 } 245 246 req_ctx->in_buf = kmalloc(ctx->key_size - 1 - req->src_len, 247 GFP_KERNEL); 248 if (!req_ctx->in_buf) 249 return -ENOMEM; 250 251 ps_end = ctx->key_size - req->src_len - 2; 252 req_ctx->in_buf[0] = 0x02; 253 for (i = 1; i < ps_end; i++) 254 req_ctx->in_buf[i] = get_random_u32_inclusive(1, 255); 255 req_ctx->in_buf[ps_end] = 0x00; 256 257 pkcs1pad_sg_set_buf(req_ctx->in_sg, req_ctx->in_buf, 258 ctx->key_size - 1 - req->src_len, req->src); 259 260 akcipher_request_set_tfm(&req_ctx->child_req, ctx->child); 261 akcipher_request_set_callback(&req_ctx->child_req, req->base.flags, 262 pkcs1pad_encrypt_sign_complete_cb, req); 263 264 /* Reuse output buffer */ 265 akcipher_request_set_crypt(&req_ctx->child_req, req_ctx->in_sg, 266 req->dst, ctx->key_size - 1, req->dst_len); 267 268 err = crypto_akcipher_encrypt(&req_ctx->child_req); 269 if (err != -EINPROGRESS && err != -EBUSY) 270 return pkcs1pad_encrypt_sign_complete(req, err); 271 272 return err; 273 } 274 275 static int pkcs1pad_decrypt_complete(struct akcipher_request *req, int err) 276 { 277 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 278 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 279 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 280 unsigned int dst_len; 281 unsigned int pos; 282 u8 *out_buf; 283 284 if (err) 285 goto done; 286 287 err = -EINVAL; 288 dst_len = req_ctx->child_req.dst_len; 289 if (dst_len < ctx->key_size - 1) 290 goto done; 291 292 out_buf = req_ctx->out_buf; 293 if (dst_len == ctx->key_size) { 294 if (out_buf[0] != 0x00) 295 /* Decrypted value had no leading 0 byte */ 296 goto done; 297 298 dst_len--; 299 out_buf++; 300 } 301 302 if (out_buf[0] != 0x02) 303 goto done; 304 305 for (pos = 1; pos < dst_len; pos++) 306 if (out_buf[pos] == 0x00) 307 break; 308 if (pos < 9 || pos == dst_len) 309 goto done; 310 pos++; 311 312 err = 0; 313 314 if (req->dst_len < dst_len - pos) 315 err = -EOVERFLOW; 316 req->dst_len = dst_len - pos; 317 318 if (!err) 319 sg_copy_from_buffer(req->dst, 320 sg_nents_for_len(req->dst, req->dst_len), 321 out_buf + pos, req->dst_len); 322 323 done: 324 kfree_sensitive(req_ctx->out_buf); 325 326 return err; 327 } 328 329 static void pkcs1pad_decrypt_complete_cb( 330 struct crypto_async_request *child_async_req, int err) 331 { 332 struct akcipher_request *req = child_async_req->data; 333 334 if (err == -EINPROGRESS) 335 goto out; 336 337 err = pkcs1pad_decrypt_complete(req, err); 338 339 out: 340 akcipher_request_complete(req, err); 341 } 342 343 static int pkcs1pad_decrypt(struct akcipher_request *req) 344 { 345 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 346 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 347 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 348 int err; 349 350 if (!ctx->key_size || req->src_len != ctx->key_size) 351 return -EINVAL; 352 353 req_ctx->out_buf = kmalloc(ctx->key_size, GFP_KERNEL); 354 if (!req_ctx->out_buf) 355 return -ENOMEM; 356 357 pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf, 358 ctx->key_size, NULL); 359 360 akcipher_request_set_tfm(&req_ctx->child_req, ctx->child); 361 akcipher_request_set_callback(&req_ctx->child_req, req->base.flags, 362 pkcs1pad_decrypt_complete_cb, req); 363 364 /* Reuse input buffer, output to a new buffer */ 365 akcipher_request_set_crypt(&req_ctx->child_req, req->src, 366 req_ctx->out_sg, req->src_len, 367 ctx->key_size); 368 369 err = crypto_akcipher_decrypt(&req_ctx->child_req); 370 if (err != -EINPROGRESS && err != -EBUSY) 371 return pkcs1pad_decrypt_complete(req, err); 372 373 return err; 374 } 375 376 static int pkcs1pad_sign(struct akcipher_request *req) 377 { 378 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 379 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 380 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 381 struct akcipher_instance *inst = akcipher_alg_instance(tfm); 382 struct pkcs1pad_inst_ctx *ictx = akcipher_instance_ctx(inst); 383 const struct rsa_asn1_template *digest_info = ictx->digest_info; 384 int err; 385 unsigned int ps_end, digest_info_size = 0; 386 387 if (!ctx->key_size) 388 return -EINVAL; 389 390 if (digest_info) 391 digest_info_size = digest_info->size; 392 393 if (req->src_len + digest_info_size > ctx->key_size - 11) 394 return -EOVERFLOW; 395 396 if (req->dst_len < ctx->key_size) { 397 req->dst_len = ctx->key_size; 398 return -EOVERFLOW; 399 } 400 401 req_ctx->in_buf = kmalloc(ctx->key_size - 1 - req->src_len, 402 GFP_KERNEL); 403 if (!req_ctx->in_buf) 404 return -ENOMEM; 405 406 ps_end = ctx->key_size - digest_info_size - req->src_len - 2; 407 req_ctx->in_buf[0] = 0x01; 408 memset(req_ctx->in_buf + 1, 0xff, ps_end - 1); 409 req_ctx->in_buf[ps_end] = 0x00; 410 411 if (digest_info) 412 memcpy(req_ctx->in_buf + ps_end + 1, digest_info->data, 413 digest_info->size); 414 415 pkcs1pad_sg_set_buf(req_ctx->in_sg, req_ctx->in_buf, 416 ctx->key_size - 1 - req->src_len, req->src); 417 418 akcipher_request_set_tfm(&req_ctx->child_req, ctx->child); 419 akcipher_request_set_callback(&req_ctx->child_req, req->base.flags, 420 pkcs1pad_encrypt_sign_complete_cb, req); 421 422 /* Reuse output buffer */ 423 akcipher_request_set_crypt(&req_ctx->child_req, req_ctx->in_sg, 424 req->dst, ctx->key_size - 1, req->dst_len); 425 426 err = crypto_akcipher_decrypt(&req_ctx->child_req); 427 if (err != -EINPROGRESS && err != -EBUSY) 428 return pkcs1pad_encrypt_sign_complete(req, err); 429 430 return err; 431 } 432 433 static int pkcs1pad_verify_complete(struct akcipher_request *req, int err) 434 { 435 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 436 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 437 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 438 struct akcipher_instance *inst = akcipher_alg_instance(tfm); 439 struct pkcs1pad_inst_ctx *ictx = akcipher_instance_ctx(inst); 440 const struct rsa_asn1_template *digest_info = ictx->digest_info; 441 const unsigned int sig_size = req->src_len; 442 const unsigned int digest_size = req->dst_len; 443 unsigned int dst_len; 444 unsigned int pos; 445 u8 *out_buf; 446 447 if (err) 448 goto done; 449 450 err = -EINVAL; 451 dst_len = req_ctx->child_req.dst_len; 452 if (dst_len < ctx->key_size - 1) 453 goto done; 454 455 out_buf = req_ctx->out_buf; 456 if (dst_len == ctx->key_size) { 457 if (out_buf[0] != 0x00) 458 /* Decrypted value had no leading 0 byte */ 459 goto done; 460 461 dst_len--; 462 out_buf++; 463 } 464 465 err = -EBADMSG; 466 if (out_buf[0] != 0x01) 467 goto done; 468 469 for (pos = 1; pos < dst_len; pos++) 470 if (out_buf[pos] != 0xff) 471 break; 472 473 if (pos < 9 || pos == dst_len || out_buf[pos] != 0x00) 474 goto done; 475 pos++; 476 477 if (digest_info) { 478 if (digest_info->size > dst_len - pos) 479 goto done; 480 if (crypto_memneq(out_buf + pos, digest_info->data, 481 digest_info->size)) 482 goto done; 483 484 pos += digest_info->size; 485 } 486 487 err = 0; 488 489 if (digest_size != dst_len - pos) { 490 err = -EKEYREJECTED; 491 req->dst_len = dst_len - pos; 492 goto done; 493 } 494 /* Extract appended digest. */ 495 sg_pcopy_to_buffer(req->src, 496 sg_nents_for_len(req->src, sig_size + digest_size), 497 req_ctx->out_buf + ctx->key_size, 498 digest_size, sig_size); 499 /* Do the actual verification step. */ 500 if (memcmp(req_ctx->out_buf + ctx->key_size, out_buf + pos, 501 digest_size) != 0) 502 err = -EKEYREJECTED; 503 done: 504 kfree_sensitive(req_ctx->out_buf); 505 506 return err; 507 } 508 509 static void pkcs1pad_verify_complete_cb( 510 struct crypto_async_request *child_async_req, int err) 511 { 512 struct akcipher_request *req = child_async_req->data; 513 514 if (err == -EINPROGRESS) 515 goto out; 516 517 err = pkcs1pad_verify_complete(req, err); 518 519 out: 520 akcipher_request_complete(req, err); 521 } 522 523 /* 524 * The verify operation is here for completeness similar to the verification 525 * defined in RFC2313 section 10.2 except that block type 0 is not accepted, 526 * as in RFC2437. RFC2437 section 9.2 doesn't define any operation to 527 * retrieve the DigestInfo from a signature, instead the user is expected 528 * to call the sign operation to generate the expected signature and compare 529 * signatures instead of the message-digests. 530 */ 531 static int pkcs1pad_verify(struct akcipher_request *req) 532 { 533 struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); 534 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 535 struct pkcs1pad_request *req_ctx = akcipher_request_ctx(req); 536 const unsigned int sig_size = req->src_len; 537 const unsigned int digest_size = req->dst_len; 538 int err; 539 540 if (WARN_ON(req->dst) || WARN_ON(!digest_size) || 541 !ctx->key_size || sig_size != ctx->key_size) 542 return -EINVAL; 543 544 req_ctx->out_buf = kmalloc(ctx->key_size + digest_size, GFP_KERNEL); 545 if (!req_ctx->out_buf) 546 return -ENOMEM; 547 548 pkcs1pad_sg_set_buf(req_ctx->out_sg, req_ctx->out_buf, 549 ctx->key_size, NULL); 550 551 akcipher_request_set_tfm(&req_ctx->child_req, ctx->child); 552 akcipher_request_set_callback(&req_ctx->child_req, req->base.flags, 553 pkcs1pad_verify_complete_cb, req); 554 555 /* Reuse input buffer, output to a new buffer */ 556 akcipher_request_set_crypt(&req_ctx->child_req, req->src, 557 req_ctx->out_sg, sig_size, ctx->key_size); 558 559 err = crypto_akcipher_encrypt(&req_ctx->child_req); 560 if (err != -EINPROGRESS && err != -EBUSY) 561 return pkcs1pad_verify_complete(req, err); 562 563 return err; 564 } 565 566 static int pkcs1pad_init_tfm(struct crypto_akcipher *tfm) 567 { 568 struct akcipher_instance *inst = akcipher_alg_instance(tfm); 569 struct pkcs1pad_inst_ctx *ictx = akcipher_instance_ctx(inst); 570 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 571 struct crypto_akcipher *child_tfm; 572 573 child_tfm = crypto_spawn_akcipher(&ictx->spawn); 574 if (IS_ERR(child_tfm)) 575 return PTR_ERR(child_tfm); 576 577 ctx->child = child_tfm; 578 579 akcipher_set_reqsize(tfm, sizeof(struct pkcs1pad_request) + 580 crypto_akcipher_reqsize(child_tfm)); 581 582 return 0; 583 } 584 585 static void pkcs1pad_exit_tfm(struct crypto_akcipher *tfm) 586 { 587 struct pkcs1pad_ctx *ctx = akcipher_tfm_ctx(tfm); 588 589 crypto_free_akcipher(ctx->child); 590 } 591 592 static void pkcs1pad_free(struct akcipher_instance *inst) 593 { 594 struct pkcs1pad_inst_ctx *ctx = akcipher_instance_ctx(inst); 595 struct crypto_akcipher_spawn *spawn = &ctx->spawn; 596 597 crypto_drop_akcipher(spawn); 598 kfree(inst); 599 } 600 601 static int pkcs1pad_create(struct crypto_template *tmpl, struct rtattr **tb) 602 { 603 u32 mask; 604 struct akcipher_instance *inst; 605 struct pkcs1pad_inst_ctx *ctx; 606 struct akcipher_alg *rsa_alg; 607 const char *hash_name; 608 int err; 609 610 err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AKCIPHER, &mask); 611 if (err) 612 return err; 613 614 inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); 615 if (!inst) 616 return -ENOMEM; 617 618 ctx = akcipher_instance_ctx(inst); 619 620 err = crypto_grab_akcipher(&ctx->spawn, akcipher_crypto_instance(inst), 621 crypto_attr_alg_name(tb[1]), 0, mask); 622 if (err) 623 goto err_free_inst; 624 625 rsa_alg = crypto_spawn_akcipher_alg(&ctx->spawn); 626 627 if (strcmp(rsa_alg->base.cra_name, "rsa") != 0) { 628 err = -EINVAL; 629 goto err_free_inst; 630 } 631 632 err = -ENAMETOOLONG; 633 hash_name = crypto_attr_alg_name(tb[2]); 634 if (IS_ERR(hash_name)) { 635 if (snprintf(inst->alg.base.cra_name, 636 CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s)", 637 rsa_alg->base.cra_name) >= CRYPTO_MAX_ALG_NAME) 638 goto err_free_inst; 639 640 if (snprintf(inst->alg.base.cra_driver_name, 641 CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s)", 642 rsa_alg->base.cra_driver_name) >= 643 CRYPTO_MAX_ALG_NAME) 644 goto err_free_inst; 645 } else { 646 ctx->digest_info = rsa_lookup_asn1(hash_name); 647 if (!ctx->digest_info) { 648 err = -EINVAL; 649 goto err_free_inst; 650 } 651 652 if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME, 653 "pkcs1pad(%s,%s)", rsa_alg->base.cra_name, 654 hash_name) >= CRYPTO_MAX_ALG_NAME) 655 goto err_free_inst; 656 657 if (snprintf(inst->alg.base.cra_driver_name, 658 CRYPTO_MAX_ALG_NAME, "pkcs1pad(%s,%s)", 659 rsa_alg->base.cra_driver_name, 660 hash_name) >= CRYPTO_MAX_ALG_NAME) 661 goto err_free_inst; 662 } 663 664 inst->alg.base.cra_priority = rsa_alg->base.cra_priority; 665 inst->alg.base.cra_ctxsize = sizeof(struct pkcs1pad_ctx); 666 667 inst->alg.init = pkcs1pad_init_tfm; 668 inst->alg.exit = pkcs1pad_exit_tfm; 669 670 inst->alg.encrypt = pkcs1pad_encrypt; 671 inst->alg.decrypt = pkcs1pad_decrypt; 672 inst->alg.sign = pkcs1pad_sign; 673 inst->alg.verify = pkcs1pad_verify; 674 inst->alg.set_pub_key = pkcs1pad_set_pub_key; 675 inst->alg.set_priv_key = pkcs1pad_set_priv_key; 676 inst->alg.max_size = pkcs1pad_get_max_size; 677 678 inst->free = pkcs1pad_free; 679 680 err = akcipher_register_instance(tmpl, inst); 681 if (err) { 682 err_free_inst: 683 pkcs1pad_free(inst); 684 } 685 return err; 686 } 687 688 struct crypto_template rsa_pkcs1pad_tmpl = { 689 .name = "pkcs1pad", 690 .create = pkcs1pad_create, 691 .module = THIS_MODULE, 692 }; 693