crypto_wolfssl.c revision 351611
1/* 2 * Wrapper functions for libwolfssl 3 * Copyright (c) 2004-2017, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9#include "includes.h" 10 11#include "common.h" 12#include "crypto.h" 13 14/* wolfSSL headers */ 15#include <wolfssl/options.h> 16#include <wolfssl/wolfcrypt/md4.h> 17#include <wolfssl/wolfcrypt/md5.h> 18#include <wolfssl/wolfcrypt/sha.h> 19#include <wolfssl/wolfcrypt/sha256.h> 20#include <wolfssl/wolfcrypt/sha512.h> 21#include <wolfssl/wolfcrypt/hmac.h> 22#include <wolfssl/wolfcrypt/pwdbased.h> 23#include <wolfssl/wolfcrypt/arc4.h> 24#include <wolfssl/wolfcrypt/des3.h> 25#include <wolfssl/wolfcrypt/aes.h> 26#include <wolfssl/wolfcrypt/dh.h> 27#include <wolfssl/wolfcrypt/cmac.h> 28#include <wolfssl/wolfcrypt/ecc.h> 29#include <wolfssl/openssl/bn.h> 30 31 32#ifndef CONFIG_FIPS 33 34int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) 35{ 36 Md4 md4; 37 size_t i; 38 39 if (TEST_FAIL()) 40 return -1; 41 42 wc_InitMd4(&md4); 43 44 for (i = 0; i < num_elem; i++) 45 wc_Md4Update(&md4, addr[i], len[i]); 46 47 wc_Md4Final(&md4, mac); 48 49 return 0; 50} 51 52 53int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) 54{ 55 wc_Md5 md5; 56 size_t i; 57 58 if (TEST_FAIL()) 59 return -1; 60 61 wc_InitMd5(&md5); 62 63 for (i = 0; i < num_elem; i++) 64 wc_Md5Update(&md5, addr[i], len[i]); 65 66 wc_Md5Final(&md5, mac); 67 68 return 0; 69} 70 71#endif /* CONFIG_FIPS */ 72 73 74int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac) 75{ 76 wc_Sha sha; 77 size_t i; 78 79 if (TEST_FAIL()) 80 return -1; 81 82 wc_InitSha(&sha); 83 84 for (i = 0; i < num_elem; i++) 85 wc_ShaUpdate(&sha, addr[i], len[i]); 86 87 wc_ShaFinal(&sha, mac); 88 89 return 0; 90} 91 92 93#ifndef NO_SHA256_WRAPPER 94int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len, 95 u8 *mac) 96{ 97 wc_Sha256 sha256; 98 size_t i; 99 100 if (TEST_FAIL()) 101 return -1; 102 103 wc_InitSha256(&sha256); 104 105 for (i = 0; i < num_elem; i++) 106 wc_Sha256Update(&sha256, addr[i], len[i]); 107 108 wc_Sha256Final(&sha256, mac); 109 110 return 0; 111} 112#endif /* NO_SHA256_WRAPPER */ 113 114 115#ifdef CONFIG_SHA384 116int sha384_vector(size_t num_elem, const u8 *addr[], const size_t *len, 117 u8 *mac) 118{ 119 wc_Sha384 sha384; 120 size_t i; 121 122 if (TEST_FAIL()) 123 return -1; 124 125 wc_InitSha384(&sha384); 126 127 for (i = 0; i < num_elem; i++) 128 wc_Sha384Update(&sha384, addr[i], len[i]); 129 130 wc_Sha384Final(&sha384, mac); 131 132 return 0; 133} 134#endif /* CONFIG_SHA384 */ 135 136 137#ifdef CONFIG_SHA512 138int sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len, 139 u8 *mac) 140{ 141 wc_Sha512 sha512; 142 size_t i; 143 144 if (TEST_FAIL()) 145 return -1; 146 147 wc_InitSha512(&sha512); 148 149 for (i = 0; i < num_elem; i++) 150 wc_Sha512Update(&sha512, addr[i], len[i]); 151 152 wc_Sha512Final(&sha512, mac); 153 154 return 0; 155} 156#endif /* CONFIG_SHA512 */ 157 158 159static int wolfssl_hmac_vector(int type, const u8 *key, 160 size_t key_len, size_t num_elem, 161 const u8 *addr[], const size_t *len, u8 *mac, 162 unsigned int mdlen) 163{ 164 Hmac hmac; 165 size_t i; 166 167 (void) mdlen; 168 169 if (TEST_FAIL()) 170 return -1; 171 172 if (wc_HmacSetKey(&hmac, type, key, (word32) key_len) != 0) 173 return -1; 174 for (i = 0; i < num_elem; i++) 175 if (wc_HmacUpdate(&hmac, addr[i], len[i]) != 0) 176 return -1; 177 if (wc_HmacFinal(&hmac, mac) != 0) 178 return -1; 179 return 0; 180} 181 182 183#ifndef CONFIG_FIPS 184 185int hmac_md5_vector(const u8 *key, size_t key_len, size_t num_elem, 186 const u8 *addr[], const size_t *len, u8 *mac) 187{ 188 return wolfssl_hmac_vector(WC_MD5, key, key_len, num_elem, addr, len, 189 mac, 16); 190} 191 192 193int hmac_md5(const u8 *key, size_t key_len, const u8 *data, size_t data_len, 194 u8 *mac) 195{ 196 return hmac_md5_vector(key, key_len, 1, &data, &data_len, mac); 197} 198 199#endif /* CONFIG_FIPS */ 200 201 202int hmac_sha1_vector(const u8 *key, size_t key_len, size_t num_elem, 203 const u8 *addr[], const size_t *len, u8 *mac) 204{ 205 return wolfssl_hmac_vector(WC_SHA, key, key_len, num_elem, addr, len, 206 mac, 20); 207} 208 209 210int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len, 211 u8 *mac) 212{ 213 return hmac_sha1_vector(key, key_len, 1, &data, &data_len, mac); 214} 215 216 217#ifdef CONFIG_SHA256 218 219int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem, 220 const u8 *addr[], const size_t *len, u8 *mac) 221{ 222 return wolfssl_hmac_vector(WC_SHA256, key, key_len, num_elem, addr, len, 223 mac, 32); 224} 225 226 227int hmac_sha256(const u8 *key, size_t key_len, const u8 *data, 228 size_t data_len, u8 *mac) 229{ 230 return hmac_sha256_vector(key, key_len, 1, &data, &data_len, mac); 231} 232 233#endif /* CONFIG_SHA256 */ 234 235 236#ifdef CONFIG_SHA384 237 238int hmac_sha384_vector(const u8 *key, size_t key_len, size_t num_elem, 239 const u8 *addr[], const size_t *len, u8 *mac) 240{ 241 return wolfssl_hmac_vector(WC_SHA384, key, key_len, num_elem, addr, len, 242 mac, 48); 243} 244 245 246int hmac_sha384(const u8 *key, size_t key_len, const u8 *data, 247 size_t data_len, u8 *mac) 248{ 249 return hmac_sha384_vector(key, key_len, 1, &data, &data_len, mac); 250} 251 252#endif /* CONFIG_SHA384 */ 253 254 255#ifdef CONFIG_SHA512 256 257int hmac_sha512_vector(const u8 *key, size_t key_len, size_t num_elem, 258 const u8 *addr[], const size_t *len, u8 *mac) 259{ 260 return wolfssl_hmac_vector(WC_SHA512, key, key_len, num_elem, addr, len, 261 mac, 64); 262} 263 264 265int hmac_sha512(const u8 *key, size_t key_len, const u8 *data, 266 size_t data_len, u8 *mac) 267{ 268 return hmac_sha512_vector(key, key_len, 1, &data, &data_len, mac); 269} 270 271#endif /* CONFIG_SHA512 */ 272 273 274int pbkdf2_sha1(const char *passphrase, const u8 *ssid, size_t ssid_len, 275 int iterations, u8 *buf, size_t buflen) 276{ 277 if (wc_PBKDF2(buf, (const byte*)passphrase, os_strlen(passphrase), ssid, 278 ssid_len, iterations, buflen, WC_SHA) != 0) 279 return -1; 280 return 0; 281} 282 283 284#ifdef CONFIG_DES 285int des_encrypt(const u8 *clear, const u8 *key, u8 *cypher) 286{ 287 Des des; 288 u8 pkey[8], next, tmp; 289 int i; 290 291 /* Add parity bits to the key */ 292 next = 0; 293 for (i = 0; i < 7; i++) { 294 tmp = key[i]; 295 pkey[i] = (tmp >> i) | next | 1; 296 next = tmp << (7 - i); 297 } 298 pkey[i] = next | 1; 299 300 wc_Des_SetKey(&des, pkey, NULL, DES_ENCRYPTION); 301 wc_Des_EcbEncrypt(&des, cypher, clear, DES_BLOCK_SIZE); 302 303 return 0; 304} 305#endif /* CONFIG_DES */ 306 307 308void * aes_encrypt_init(const u8 *key, size_t len) 309{ 310 Aes *aes; 311 312 if (TEST_FAIL()) 313 return NULL; 314 315 aes = os_malloc(sizeof(Aes)); 316 if (!aes) 317 return NULL; 318 319 if (wc_AesSetKey(aes, key, len, NULL, AES_ENCRYPTION) < 0) { 320 os_free(aes); 321 return NULL; 322 } 323 324 return aes; 325} 326 327 328int aes_encrypt(void *ctx, const u8 *plain, u8 *crypt) 329{ 330 wc_AesEncryptDirect(ctx, crypt, plain); 331 return 0; 332} 333 334 335void aes_encrypt_deinit(void *ctx) 336{ 337 os_free(ctx); 338} 339 340 341void * aes_decrypt_init(const u8 *key, size_t len) 342{ 343 Aes *aes; 344 345 if (TEST_FAIL()) 346 return NULL; 347 348 aes = os_malloc(sizeof(Aes)); 349 if (!aes) 350 return NULL; 351 352 if (wc_AesSetKey(aes, key, len, NULL, AES_DECRYPTION) < 0) { 353 os_free(aes); 354 return NULL; 355 } 356 357 return aes; 358} 359 360 361int aes_decrypt(void *ctx, const u8 *crypt, u8 *plain) 362{ 363 wc_AesDecryptDirect(ctx, plain, crypt); 364 return 0; 365} 366 367 368void aes_decrypt_deinit(void *ctx) 369{ 370 os_free(ctx); 371} 372 373 374int aes_128_cbc_encrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) 375{ 376 Aes aes; 377 int ret; 378 379 if (TEST_FAIL()) 380 return -1; 381 382 ret = wc_AesSetKey(&aes, key, 16, iv, AES_ENCRYPTION); 383 if (ret != 0) 384 return -1; 385 386 ret = wc_AesCbcEncrypt(&aes, data, data, data_len); 387 if (ret != 0) 388 return -1; 389 return 0; 390} 391 392 393int aes_128_cbc_decrypt(const u8 *key, const u8 *iv, u8 *data, size_t data_len) 394{ 395 Aes aes; 396 int ret; 397 398 if (TEST_FAIL()) 399 return -1; 400 401 ret = wc_AesSetKey(&aes, key, 16, iv, AES_DECRYPTION); 402 if (ret != 0) 403 return -1; 404 405 ret = wc_AesCbcDecrypt(&aes, data, data, data_len); 406 if (ret != 0) 407 return -1; 408 return 0; 409} 410 411 412int aes_wrap(const u8 *kek, size_t kek_len, int n, const u8 *plain, u8 *cipher) 413{ 414 int ret; 415 416 if (TEST_FAIL()) 417 return -1; 418 419 ret = wc_AesKeyWrap(kek, kek_len, plain, n * 8, cipher, (n + 1) * 8, 420 NULL); 421 return ret != (n + 1) * 8 ? -1 : 0; 422} 423 424 425int aes_unwrap(const u8 *kek, size_t kek_len, int n, const u8 *cipher, 426 u8 *plain) 427{ 428 int ret; 429 430 if (TEST_FAIL()) 431 return -1; 432 433 ret = wc_AesKeyUnWrap(kek, kek_len, cipher, (n + 1) * 8, plain, n * 8, 434 NULL); 435 return ret != n * 8 ? -1 : 0; 436} 437 438 439#ifndef CONFIG_NO_RC4 440int rc4_skip(const u8 *key, size_t keylen, size_t skip, u8 *data, 441 size_t data_len) 442{ 443#ifndef NO_RC4 444 Arc4 arc4; 445 unsigned char skip_buf[16]; 446 447 wc_Arc4SetKey(&arc4, key, keylen); 448 449 while (skip >= sizeof(skip_buf)) { 450 size_t len = skip; 451 452 if (len > sizeof(skip_buf)) 453 len = sizeof(skip_buf); 454 wc_Arc4Process(&arc4, skip_buf, skip_buf, len); 455 skip -= len; 456 } 457 458 wc_Arc4Process(&arc4, data, data, data_len); 459 460 return 0; 461#else /* NO_RC4 */ 462 return -1; 463#endif /* NO_RC4 */ 464} 465#endif /* CONFIG_NO_RC4 */ 466 467 468#if defined(EAP_IKEV2) || defined(EAP_IKEV2_DYNAMIC) \ 469 || defined(EAP_SERVER_IKEV2) 470union wolfssl_cipher { 471 Aes aes; 472 Des3 des3; 473 Arc4 arc4; 474}; 475 476struct crypto_cipher { 477 enum crypto_cipher_alg alg; 478 union wolfssl_cipher enc; 479 union wolfssl_cipher dec; 480}; 481 482struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg, 483 const u8 *iv, const u8 *key, 484 size_t key_len) 485{ 486 struct crypto_cipher *ctx; 487 488 ctx = os_zalloc(sizeof(*ctx)); 489 if (!ctx) 490 return NULL; 491 492 switch (alg) { 493#ifndef CONFIG_NO_RC4 494#ifndef NO_RC4 495 case CRYPTO_CIPHER_ALG_RC4: 496 wc_Arc4SetKey(&ctx->enc.arc4, key, key_len); 497 wc_Arc4SetKey(&ctx->dec.arc4, key, key_len); 498 break; 499#endif /* NO_RC4 */ 500#endif /* CONFIG_NO_RC4 */ 501#ifndef NO_AES 502 case CRYPTO_CIPHER_ALG_AES: 503 switch (key_len) { 504 case 16: 505 case 24: 506 case 32: 507 break; 508 default: 509 os_free(ctx); 510 return NULL; 511 } 512 if (wc_AesSetKey(&ctx->enc.aes, key, key_len, iv, 513 AES_ENCRYPTION) || 514 wc_AesSetKey(&ctx->dec.aes, key, key_len, iv, 515 AES_DECRYPTION)) { 516 os_free(ctx); 517 return NULL; 518 } 519 break; 520#endif /* NO_AES */ 521#ifndef NO_DES3 522 case CRYPTO_CIPHER_ALG_3DES: 523 if (key_len != DES3_KEYLEN || 524 wc_Des3_SetKey(&ctx->enc.des3, key, iv, DES_ENCRYPTION) || 525 wc_Des3_SetKey(&ctx->dec.des3, key, iv, DES_DECRYPTION)) { 526 os_free(ctx); 527 return NULL; 528 } 529 break; 530#endif /* NO_DES3 */ 531 case CRYPTO_CIPHER_ALG_RC2: 532 case CRYPTO_CIPHER_ALG_DES: 533 default: 534 os_free(ctx); 535 return NULL; 536 } 537 538 ctx->alg = alg; 539 540 return ctx; 541} 542 543 544int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain, 545 u8 *crypt, size_t len) 546{ 547 switch (ctx->alg) { 548#ifndef CONFIG_NO_RC4 549#ifndef NO_RC4 550 case CRYPTO_CIPHER_ALG_RC4: 551 wc_Arc4Process(&ctx->enc.arc4, crypt, plain, len); 552 return 0; 553#endif /* NO_RC4 */ 554#endif /* CONFIG_NO_RC4 */ 555#ifndef NO_AES 556 case CRYPTO_CIPHER_ALG_AES: 557 if (wc_AesCbcEncrypt(&ctx->enc.aes, crypt, plain, len) != 0) 558 return -1; 559 return 0; 560#endif /* NO_AES */ 561#ifndef NO_DES3 562 case CRYPTO_CIPHER_ALG_3DES: 563 if (wc_Des3_CbcEncrypt(&ctx->enc.des3, crypt, plain, len) != 0) 564 return -1; 565 return 0; 566#endif /* NO_DES3 */ 567 default: 568 return -1; 569 } 570 return -1; 571} 572 573 574int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt, 575 u8 *plain, size_t len) 576{ 577 switch (ctx->alg) { 578#ifndef CONFIG_NO_RC4 579#ifndef NO_RC4 580 case CRYPTO_CIPHER_ALG_RC4: 581 wc_Arc4Process(&ctx->dec.arc4, plain, crypt, len); 582 return 0; 583#endif /* NO_RC4 */ 584#endif /* CONFIG_NO_RC4 */ 585#ifndef NO_AES 586 case CRYPTO_CIPHER_ALG_AES: 587 if (wc_AesCbcDecrypt(&ctx->dec.aes, plain, crypt, len) != 0) 588 return -1; 589 return 0; 590#endif /* NO_AES */ 591#ifndef NO_DES3 592 case CRYPTO_CIPHER_ALG_3DES: 593 if (wc_Des3_CbcDecrypt(&ctx->dec.des3, plain, crypt, len) != 0) 594 return -1; 595 return 0; 596#endif /* NO_DES3 */ 597 default: 598 return -1; 599 } 600 return -1; 601} 602 603 604void crypto_cipher_deinit(struct crypto_cipher *ctx) 605{ 606 os_free(ctx); 607} 608 609#endif 610 611 612#ifdef CONFIG_WPS_NFC 613 614static const unsigned char RFC3526_PRIME_1536[] = { 615 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xC9, 0x0F, 0xDA, 0xA2, 616 0x21, 0x68, 0xC2, 0x34, 0xC4, 0xC6, 0x62, 0x8B, 0x80, 0xDC, 0x1C, 0xD1, 617 0x29, 0x02, 0x4E, 0x08, 0x8A, 0x67, 0xCC, 0x74, 0x02, 0x0B, 0xBE, 0xA6, 618 0x3B, 0x13, 0x9B, 0x22, 0x51, 0x4A, 0x08, 0x79, 0x8E, 0x34, 0x04, 0xDD, 619 0xEF, 0x95, 0x19, 0xB3, 0xCD, 0x3A, 0x43, 0x1B, 0x30, 0x2B, 0x0A, 0x6D, 620 0xF2, 0x5F, 0x14, 0x37, 0x4F, 0xE1, 0x35, 0x6D, 0x6D, 0x51, 0xC2, 0x45, 621 0xE4, 0x85, 0xB5, 0x76, 0x62, 0x5E, 0x7E, 0xC6, 0xF4, 0x4C, 0x42, 0xE9, 622 0xA6, 0x37, 0xED, 0x6B, 0x0B, 0xFF, 0x5C, 0xB6, 0xF4, 0x06, 0xB7, 0xED, 623 0xEE, 0x38, 0x6B, 0xFB, 0x5A, 0x89, 0x9F, 0xA5, 0xAE, 0x9F, 0x24, 0x11, 624 0x7C, 0x4B, 0x1F, 0xE6, 0x49, 0x28, 0x66, 0x51, 0xEC, 0xE4, 0x5B, 0x3D, 625 0xC2, 0x00, 0x7C, 0xB8, 0xA1, 0x63, 0xBF, 0x05, 0x98, 0xDA, 0x48, 0x36, 626 0x1C, 0x55, 0xD3, 0x9A, 0x69, 0x16, 0x3F, 0xA8, 0xFD, 0x24, 0xCF, 0x5F, 627 0x83, 0x65, 0x5D, 0x23, 0xDC, 0xA3, 0xAD, 0x96, 0x1C, 0x62, 0xF3, 0x56, 628 0x20, 0x85, 0x52, 0xBB, 0x9E, 0xD5, 0x29, 0x07, 0x70, 0x96, 0x96, 0x6D, 629 0x67, 0x0C, 0x35, 0x4E, 0x4A, 0xBC, 0x98, 0x04, 0xF1, 0x74, 0x6C, 0x08, 630 0xCA, 0x23, 0x73, 0x27, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF 631}; 632 633static const unsigned char RFC3526_GENERATOR_1536[] = { 634 0x02 635}; 636 637#define RFC3526_LEN sizeof(RFC3526_PRIME_1536) 638 639 640void * dh5_init(struct wpabuf **priv, struct wpabuf **publ) 641{ 642 WC_RNG rng; 643 DhKey *ret = NULL; 644 DhKey *dh = NULL; 645 struct wpabuf *privkey = NULL; 646 struct wpabuf *pubkey = NULL; 647 word32 priv_sz, pub_sz; 648 649 *priv = NULL; 650 wpabuf_free(*publ); 651 *publ = NULL; 652 653 dh = XMALLOC(sizeof(DhKey), NULL, DYNAMIC_TYPE_TMP_BUFFER); 654 if (!dh) 655 return NULL; 656 wc_InitDhKey(dh); 657 658 if (wc_InitRng(&rng) != 0) { 659 XFREE(dh, NULL, DYNAMIC_TYPE_TMP_BUFFER); 660 return NULL; 661 } 662 663 privkey = wpabuf_alloc(RFC3526_LEN); 664 pubkey = wpabuf_alloc(RFC3526_LEN); 665 if (!privkey || !pubkey) 666 goto done; 667 668 if (wc_DhSetKey(dh, RFC3526_PRIME_1536, sizeof(RFC3526_PRIME_1536), 669 RFC3526_GENERATOR_1536, sizeof(RFC3526_GENERATOR_1536)) 670 != 0) 671 goto done; 672 673 if (wc_DhGenerateKeyPair(dh, &rng, wpabuf_mhead(privkey), &priv_sz, 674 wpabuf_mhead(pubkey), &pub_sz) != 0) 675 goto done; 676 677 wpabuf_put(privkey, priv_sz); 678 wpabuf_put(pubkey, pub_sz); 679 680 ret = dh; 681 *priv = privkey; 682 *publ = pubkey; 683 dh = NULL; 684 privkey = NULL; 685 pubkey = NULL; 686done: 687 wpabuf_clear_free(pubkey); 688 wpabuf_clear_free(privkey); 689 if (dh) { 690 wc_FreeDhKey(dh); 691 XFREE(dh, NULL, DYNAMIC_TYPE_TMP_BUFFER); 692 } 693 wc_FreeRng(&rng); 694 return ret; 695} 696 697 698void * dh5_init_fixed(const struct wpabuf *priv, const struct wpabuf *publ) 699{ 700 DhKey *ret = NULL; 701 DhKey *dh; 702 byte *secret; 703 word32 secret_sz; 704 705 dh = XMALLOC(sizeof(DhKey), NULL, DYNAMIC_TYPE_TMP_BUFFER); 706 if (!dh) 707 return NULL; 708 wc_InitDhKey(dh); 709 710 secret = XMALLOC(RFC3526_LEN, NULL, DYNAMIC_TYPE_TMP_BUFFER); 711 if (!secret) 712 goto done; 713 714 if (wc_DhSetKey(dh, RFC3526_PRIME_1536, sizeof(RFC3526_PRIME_1536), 715 RFC3526_GENERATOR_1536, sizeof(RFC3526_GENERATOR_1536)) 716 != 0) 717 goto done; 718 719 if (wc_DhAgree(dh, secret, &secret_sz, wpabuf_head(priv), 720 wpabuf_len(priv), RFC3526_GENERATOR_1536, 721 sizeof(RFC3526_GENERATOR_1536)) != 0) 722 goto done; 723 724 if (secret_sz != wpabuf_len(publ) || 725 os_memcmp(secret, wpabuf_head(publ), secret_sz) != 0) 726 goto done; 727 728 ret = dh; 729 dh = NULL; 730done: 731 if (dh) { 732 wc_FreeDhKey(dh); 733 XFREE(dh, NULL, DYNAMIC_TYPE_TMP_BUFFER); 734 } 735 XFREE(secret, NULL, DYNAMIC_TYPE_TMP_BUFFER); 736 return ret; 737} 738 739 740struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public, 741 const struct wpabuf *own_private) 742{ 743 struct wpabuf *ret = NULL; 744 struct wpabuf *secret; 745 word32 secret_sz; 746 747 secret = wpabuf_alloc(RFC3526_LEN); 748 if (!secret) 749 goto done; 750 751 if (wc_DhAgree(ctx, wpabuf_mhead(secret), &secret_sz, 752 wpabuf_head(own_private), wpabuf_len(own_private), 753 wpabuf_head(peer_public), wpabuf_len(peer_public)) != 0) 754 goto done; 755 756 wpabuf_put(secret, secret_sz); 757 758 ret = secret; 759 secret = NULL; 760done: 761 wpabuf_clear_free(secret); 762 return ret; 763} 764 765 766void dh5_free(void *ctx) 767{ 768 if (!ctx) 769 return; 770 771 wc_FreeDhKey(ctx); 772 XFREE(ctx, NULL, DYNAMIC_TYPE_TMP_BUFFER); 773} 774 775#endif /* CONFIG_WPS_NFC */ 776 777 778int crypto_dh_init(u8 generator, const u8 *prime, size_t prime_len, u8 *privkey, 779 u8 *pubkey) 780{ 781 int ret = -1; 782 WC_RNG rng; 783 DhKey *dh = NULL; 784 word32 priv_sz, pub_sz; 785 786 if (TEST_FAIL()) 787 return -1; 788 789 dh = os_malloc(sizeof(DhKey)); 790 if (!dh) 791 return -1; 792 wc_InitDhKey(dh); 793 794 if (wc_InitRng(&rng) != 0) { 795 os_free(dh); 796 return -1; 797 } 798 799 if (wc_DhSetKey(dh, prime, prime_len, &generator, 1) != 0) 800 goto done; 801 802 if (wc_DhGenerateKeyPair(dh, &rng, privkey, &priv_sz, pubkey, &pub_sz) 803 != 0) 804 goto done; 805 806 if (priv_sz < prime_len) { 807 size_t pad_sz = prime_len - priv_sz; 808 809 os_memmove(privkey + pad_sz, privkey, priv_sz); 810 os_memset(privkey, 0, pad_sz); 811 } 812 813 if (pub_sz < prime_len) { 814 size_t pad_sz = prime_len - pub_sz; 815 816 os_memmove(pubkey + pad_sz, pubkey, pub_sz); 817 os_memset(pubkey, 0, pad_sz); 818 } 819 ret = 0; 820done: 821 wc_FreeDhKey(dh); 822 os_free(dh); 823 wc_FreeRng(&rng); 824 return ret; 825} 826 827 828int crypto_dh_derive_secret(u8 generator, const u8 *prime, size_t prime_len, 829 const u8 *order, size_t order_len, 830 const u8 *privkey, size_t privkey_len, 831 const u8 *pubkey, size_t pubkey_len, 832 u8 *secret, size_t *len) 833{ 834 int ret = -1; 835 DhKey *dh; 836 word32 secret_sz; 837 838 dh = os_malloc(sizeof(DhKey)); 839 if (!dh) 840 return -1; 841 wc_InitDhKey(dh); 842 843 if (wc_DhSetKey(dh, prime, prime_len, &generator, 1) != 0) 844 goto done; 845 846 if (wc_DhAgree(dh, secret, &secret_sz, privkey, privkey_len, pubkey, 847 pubkey_len) != 0) 848 goto done; 849 850 *len = secret_sz; 851 ret = 0; 852done: 853 wc_FreeDhKey(dh); 854 os_free(dh); 855 return ret; 856} 857 858 859#ifdef CONFIG_FIPS 860int crypto_get_random(void *buf, size_t len) 861{ 862 int ret = 0; 863 WC_RNG rng; 864 865 if (wc_InitRng(&rng) != 0) 866 return -1; 867 if (wc_RNG_GenerateBlock(&rng, buf, len) != 0) 868 ret = -1; 869 wc_FreeRng(&rng); 870 return ret; 871} 872#endif /* CONFIG_FIPS */ 873 874 875#if defined(EAP_PWD) || defined(EAP_SERVER_PWD) 876struct crypto_hash { 877 Hmac hmac; 878 int size; 879}; 880 881 882struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key, 883 size_t key_len) 884{ 885 struct crypto_hash *ret = NULL; 886 struct crypto_hash *hash; 887 int type; 888 889 hash = os_zalloc(sizeof(*hash)); 890 if (!hash) 891 goto done; 892 893 switch (alg) { 894#ifndef NO_MD5 895 case CRYPTO_HASH_ALG_HMAC_MD5: 896 hash->size = 16; 897 type = WC_MD5; 898 break; 899#endif /* NO_MD5 */ 900#ifndef NO_SHA 901 case CRYPTO_HASH_ALG_HMAC_SHA1: 902 type = WC_SHA; 903 hash->size = 20; 904 break; 905#endif /* NO_SHA */ 906#ifdef CONFIG_SHA256 907#ifndef NO_SHA256 908 case CRYPTO_HASH_ALG_HMAC_SHA256: 909 type = WC_SHA256; 910 hash->size = 32; 911 break; 912#endif /* NO_SHA256 */ 913#endif /* CONFIG_SHA256 */ 914 default: 915 goto done; 916 } 917 918 if (wc_HmacSetKey(&hash->hmac, type, key, key_len) != 0) 919 goto done; 920 921 ret = hash; 922 hash = NULL; 923done: 924 os_free(hash); 925 return ret; 926} 927 928 929void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len) 930{ 931 if (!ctx) 932 return; 933 wc_HmacUpdate(&ctx->hmac, data, len); 934} 935 936 937int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len) 938{ 939 int ret = 0; 940 941 if (!ctx) 942 return -2; 943 944 if (!mac || !len) 945 goto done; 946 947 if (wc_HmacFinal(&ctx->hmac, mac) != 0) { 948 ret = -1; 949 goto done; 950 } 951 952 *len = ctx->size; 953 ret = 0; 954done: 955 bin_clear_free(ctx, sizeof(*ctx)); 956 if (TEST_FAIL()) 957 return -1; 958 return ret; 959} 960 961#endif 962 963 964int omac1_aes_vector(const u8 *key, size_t key_len, size_t num_elem, 965 const u8 *addr[], const size_t *len, u8 *mac) 966{ 967 Cmac cmac; 968 size_t i; 969 word32 sz; 970 971 if (TEST_FAIL()) 972 return -1; 973 974 if (wc_InitCmac(&cmac, key, key_len, WC_CMAC_AES, NULL) != 0) 975 return -1; 976 977 for (i = 0; i < num_elem; i++) 978 if (wc_CmacUpdate(&cmac, addr[i], len[i]) != 0) 979 return -1; 980 981 sz = AES_BLOCK_SIZE; 982 if (wc_CmacFinal(&cmac, mac, &sz) != 0 || sz != AES_BLOCK_SIZE) 983 return -1; 984 985 return 0; 986} 987 988 989int omac1_aes_128_vector(const u8 *key, size_t num_elem, 990 const u8 *addr[], const size_t *len, u8 *mac) 991{ 992 return omac1_aes_vector(key, 16, num_elem, addr, len, mac); 993} 994 995 996int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac) 997{ 998 return omac1_aes_128_vector(key, 1, &data, &data_len, mac); 999} 1000 1001 1002int omac1_aes_256(const u8 *key, const u8 *data, size_t data_len, u8 *mac) 1003{ 1004 return omac1_aes_vector(key, 32, 1, &data, &data_len, mac); 1005} 1006 1007 1008struct crypto_bignum * crypto_bignum_init(void) 1009{ 1010 mp_int *a; 1011 1012 if (TEST_FAIL()) 1013 return NULL; 1014 1015 a = os_malloc(sizeof(*a)); 1016 if (!a || mp_init(a) != MP_OKAY) { 1017 os_free(a); 1018 a = NULL; 1019 } 1020 1021 return (struct crypto_bignum *) a; 1022} 1023 1024 1025struct crypto_bignum * crypto_bignum_init_set(const u8 *buf, size_t len) 1026{ 1027 mp_int *a; 1028 1029 if (TEST_FAIL()) 1030 return NULL; 1031 1032 a = (mp_int *) crypto_bignum_init(); 1033 if (!a) 1034 return NULL; 1035 1036 if (mp_read_unsigned_bin(a, buf, len) != MP_OKAY) { 1037 os_free(a); 1038 a = NULL; 1039 } 1040 1041 return (struct crypto_bignum *) a; 1042} 1043 1044 1045void crypto_bignum_deinit(struct crypto_bignum *n, int clear) 1046{ 1047 if (!n) 1048 return; 1049 1050 if (clear) 1051 mp_forcezero((mp_int *) n); 1052 mp_clear((mp_int *) n); 1053 os_free((mp_int *) n); 1054} 1055 1056 1057int crypto_bignum_to_bin(const struct crypto_bignum *a, 1058 u8 *buf, size_t buflen, size_t padlen) 1059{ 1060 int num_bytes, offset; 1061 1062 if (TEST_FAIL()) 1063 return -1; 1064 1065 if (padlen > buflen) 1066 return -1; 1067 1068 num_bytes = (mp_count_bits((mp_int *) a) + 7) / 8; 1069 if ((size_t) num_bytes > buflen) 1070 return -1; 1071 if (padlen > (size_t) num_bytes) 1072 offset = padlen - num_bytes; 1073 else 1074 offset = 0; 1075 1076 os_memset(buf, 0, offset); 1077 mp_to_unsigned_bin((mp_int *) a, buf + offset); 1078 1079 return num_bytes + offset; 1080} 1081 1082 1083int crypto_bignum_rand(struct crypto_bignum *r, const struct crypto_bignum *m) 1084{ 1085 int ret = 0; 1086 WC_RNG rng; 1087 1088 if (TEST_FAIL()) 1089 return -1; 1090 if (wc_InitRng(&rng) != 0) 1091 return -1; 1092 if (mp_rand_prime((mp_int *) r, 1093 (mp_count_bits((mp_int *) m) + 7) / 8 * 2, 1094 &rng, NULL) != 0) 1095 ret = -1; 1096 if (ret == 0 && 1097 mp_mod((mp_int *) r, (mp_int *) m, (mp_int *) r) != 0) 1098 ret = -1; 1099 wc_FreeRng(&rng); 1100 return ret; 1101} 1102 1103 1104int crypto_bignum_add(const struct crypto_bignum *a, 1105 const struct crypto_bignum *b, 1106 struct crypto_bignum *r) 1107{ 1108 return mp_add((mp_int *) a, (mp_int *) b, 1109 (mp_int *) r) == MP_OKAY ? 0 : -1; 1110} 1111 1112 1113int crypto_bignum_mod(const struct crypto_bignum *a, 1114 const struct crypto_bignum *m, 1115 struct crypto_bignum *r) 1116{ 1117 return mp_mod((mp_int *) a, (mp_int *) m, 1118 (mp_int *) r) == MP_OKAY ? 0 : -1; 1119} 1120 1121 1122int crypto_bignum_exptmod(const struct crypto_bignum *b, 1123 const struct crypto_bignum *e, 1124 const struct crypto_bignum *m, 1125 struct crypto_bignum *r) 1126{ 1127 if (TEST_FAIL()) 1128 return -1; 1129 1130 return mp_exptmod((mp_int *) b, (mp_int *) e, (mp_int *) m, 1131 (mp_int *) r) == MP_OKAY ? 0 : -1; 1132} 1133 1134 1135int crypto_bignum_inverse(const struct crypto_bignum *a, 1136 const struct crypto_bignum *m, 1137 struct crypto_bignum *r) 1138{ 1139 if (TEST_FAIL()) 1140 return -1; 1141 1142 return mp_invmod((mp_int *) a, (mp_int *) m, 1143 (mp_int *) r) == MP_OKAY ? 0 : -1; 1144} 1145 1146 1147int crypto_bignum_sub(const struct crypto_bignum *a, 1148 const struct crypto_bignum *b, 1149 struct crypto_bignum *r) 1150{ 1151 if (TEST_FAIL()) 1152 return -1; 1153 1154 return mp_add((mp_int *) a, (mp_int *) b, 1155 (mp_int *) r) == MP_OKAY ? 0 : -1; 1156} 1157 1158 1159int crypto_bignum_div(const struct crypto_bignum *a, 1160 const struct crypto_bignum *b, 1161 struct crypto_bignum *d) 1162{ 1163 if (TEST_FAIL()) 1164 return -1; 1165 1166 return mp_div((mp_int *) a, (mp_int *) b, (mp_int *) d, 1167 NULL) == MP_OKAY ? 0 : -1; 1168} 1169 1170 1171int crypto_bignum_mulmod(const struct crypto_bignum *a, 1172 const struct crypto_bignum *b, 1173 const struct crypto_bignum *m, 1174 struct crypto_bignum *d) 1175{ 1176 if (TEST_FAIL()) 1177 return -1; 1178 1179 return mp_mulmod((mp_int *) a, (mp_int *) b, (mp_int *) m, 1180 (mp_int *) d) == MP_OKAY ? 0 : -1; 1181} 1182 1183 1184int crypto_bignum_rshift(const struct crypto_bignum *a, int n, 1185 struct crypto_bignum *r) 1186{ 1187 if (mp_copy((mp_int *) a, (mp_int *) r) != MP_OKAY) 1188 return -1; 1189 mp_rshb((mp_int *) r, n); 1190 return 0; 1191} 1192 1193 1194int crypto_bignum_cmp(const struct crypto_bignum *a, 1195 const struct crypto_bignum *b) 1196{ 1197 return mp_cmp((mp_int *) a, (mp_int *) b); 1198} 1199 1200 1201int crypto_bignum_is_zero(const struct crypto_bignum *a) 1202{ 1203 return mp_iszero((mp_int *) a); 1204} 1205 1206 1207int crypto_bignum_is_one(const struct crypto_bignum *a) 1208{ 1209 return mp_isone((const mp_int *) a); 1210} 1211 1212int crypto_bignum_is_odd(const struct crypto_bignum *a) 1213{ 1214 return mp_isodd((mp_int *) a); 1215} 1216 1217 1218int crypto_bignum_legendre(const struct crypto_bignum *a, 1219 const struct crypto_bignum *p) 1220{ 1221 mp_int t; 1222 int ret; 1223 int res = -2; 1224 1225 if (TEST_FAIL()) 1226 return -2; 1227 1228 if (mp_init(&t) != MP_OKAY) 1229 return -2; 1230 1231 /* t = (p-1) / 2 */ 1232 ret = mp_sub_d((mp_int *) p, 1, &t); 1233 if (ret == MP_OKAY) 1234 mp_rshb(&t, 1); 1235 if (ret == MP_OKAY) 1236 ret = mp_exptmod((mp_int *) a, &t, (mp_int *) p, &t); 1237 if (ret == MP_OKAY) { 1238 if (mp_isone(&t)) 1239 res = 1; 1240 else if (mp_iszero(&t)) 1241 res = 0; 1242 else 1243 res = -1; 1244 } 1245 1246 mp_clear(&t); 1247 return res; 1248} 1249 1250 1251#ifdef CONFIG_ECC 1252 1253int ecc_map(ecc_point *, mp_int *, mp_digit); 1254int ecc_projective_add_point(ecc_point *P, ecc_point *Q, ecc_point *R, 1255 mp_int *a, mp_int *modulus, mp_digit mp); 1256 1257struct crypto_ec { 1258 ecc_key key; 1259 mp_int a; 1260 mp_int prime; 1261 mp_int order; 1262 mp_digit mont_b; 1263 mp_int b; 1264}; 1265 1266 1267struct crypto_ec * crypto_ec_init(int group) 1268{ 1269 int built = 0; 1270 struct crypto_ec *e; 1271 int curve_id; 1272 1273 /* Map from IANA registry for IKE D-H groups to OpenSSL NID */ 1274 switch (group) { 1275 case 19: 1276 curve_id = ECC_SECP256R1; 1277 break; 1278 case 20: 1279 curve_id = ECC_SECP384R1; 1280 break; 1281 case 21: 1282 curve_id = ECC_SECP521R1; 1283 break; 1284 case 25: 1285 curve_id = ECC_SECP192R1; 1286 break; 1287 case 26: 1288 curve_id = ECC_SECP224R1; 1289 break; 1290#ifdef HAVE_ECC_BRAINPOOL 1291 case 27: 1292 curve_id = ECC_BRAINPOOLP224R1; 1293 break; 1294 case 28: 1295 curve_id = ECC_BRAINPOOLP256R1; 1296 break; 1297 case 29: 1298 curve_id = ECC_BRAINPOOLP384R1; 1299 break; 1300 case 30: 1301 curve_id = ECC_BRAINPOOLP512R1; 1302 break; 1303#endif /* HAVE_ECC_BRAINPOOL */ 1304 default: 1305 return NULL; 1306 } 1307 1308 e = os_zalloc(sizeof(*e)); 1309 if (!e) 1310 return NULL; 1311 1312 if (wc_ecc_init(&e->key) != 0 || 1313 wc_ecc_set_curve(&e->key, 0, curve_id) != 0 || 1314 mp_init(&e->a) != MP_OKAY || 1315 mp_init(&e->prime) != MP_OKAY || 1316 mp_init(&e->order) != MP_OKAY || 1317 mp_init(&e->b) != MP_OKAY || 1318 mp_read_radix(&e->a, e->key.dp->Af, 16) != MP_OKAY || 1319 mp_read_radix(&e->b, e->key.dp->Bf, 16) != MP_OKAY || 1320 mp_read_radix(&e->prime, e->key.dp->prime, 16) != MP_OKAY || 1321 mp_read_radix(&e->order, e->key.dp->order, 16) != MP_OKAY || 1322 mp_montgomery_setup(&e->prime, &e->mont_b) != MP_OKAY) 1323 goto done; 1324 1325 built = 1; 1326done: 1327 if (!built) { 1328 crypto_ec_deinit(e); 1329 e = NULL; 1330 } 1331 return e; 1332} 1333 1334 1335void crypto_ec_deinit(struct crypto_ec* e) 1336{ 1337 if (!e) 1338 return; 1339 1340 mp_clear(&e->b); 1341 mp_clear(&e->order); 1342 mp_clear(&e->prime); 1343 mp_clear(&e->a); 1344 wc_ecc_free(&e->key); 1345 os_free(e); 1346} 1347 1348 1349struct crypto_ec_point * crypto_ec_point_init(struct crypto_ec *e) 1350{ 1351 if (TEST_FAIL()) 1352 return NULL; 1353 if (!e) 1354 return NULL; 1355 return (struct crypto_ec_point *) wc_ecc_new_point(); 1356} 1357 1358 1359size_t crypto_ec_prime_len(struct crypto_ec *e) 1360{ 1361 return (mp_count_bits(&e->prime) + 7) / 8; 1362} 1363 1364 1365size_t crypto_ec_prime_len_bits(struct crypto_ec *e) 1366{ 1367 return mp_count_bits(&e->prime); 1368} 1369 1370 1371size_t crypto_ec_order_len(struct crypto_ec *e) 1372{ 1373 return (mp_count_bits(&e->order) + 7) / 8; 1374} 1375 1376 1377const struct crypto_bignum * crypto_ec_get_prime(struct crypto_ec *e) 1378{ 1379 return (const struct crypto_bignum *) &e->prime; 1380} 1381 1382 1383const struct crypto_bignum * crypto_ec_get_order(struct crypto_ec *e) 1384{ 1385 return (const struct crypto_bignum *) &e->order; 1386} 1387 1388 1389void crypto_ec_point_deinit(struct crypto_ec_point *p, int clear) 1390{ 1391 ecc_point *point = (ecc_point *) p; 1392 1393 if (!p) 1394 return; 1395 1396 if (clear) { 1397 mp_forcezero(point->x); 1398 mp_forcezero(point->y); 1399 mp_forcezero(point->z); 1400 } 1401 wc_ecc_del_point(point); 1402} 1403 1404 1405int crypto_ec_point_x(struct crypto_ec *e, const struct crypto_ec_point *p, 1406 struct crypto_bignum *x) 1407{ 1408 return mp_copy(((ecc_point *) p)->x, (mp_int *) x) == MP_OKAY ? 0 : -1; 1409} 1410 1411 1412int crypto_ec_point_to_bin(struct crypto_ec *e, 1413 const struct crypto_ec_point *point, u8 *x, u8 *y) 1414{ 1415 ecc_point *p = (ecc_point *) point; 1416 1417 if (TEST_FAIL()) 1418 return -1; 1419 1420 if (!mp_isone(p->z)) { 1421 if (ecc_map(p, &e->prime, e->mont_b) != MP_OKAY) 1422 return -1; 1423 } 1424 1425 if (x) { 1426 if (crypto_bignum_to_bin((struct crypto_bignum *)p->x, x, 1427 e->key.dp->size, 1428 e->key.dp->size) <= 0) 1429 return -1; 1430 } 1431 1432 if (y) { 1433 if (crypto_bignum_to_bin((struct crypto_bignum *) p->y, y, 1434 e->key.dp->size, 1435 e->key.dp->size) <= 0) 1436 return -1; 1437 } 1438 1439 return 0; 1440} 1441 1442 1443struct crypto_ec_point * crypto_ec_point_from_bin(struct crypto_ec *e, 1444 const u8 *val) 1445{ 1446 ecc_point *point = NULL; 1447 int loaded = 0; 1448 1449 if (TEST_FAIL()) 1450 return NULL; 1451 1452 point = wc_ecc_new_point(); 1453 if (!point) 1454 goto done; 1455 1456 if (mp_read_unsigned_bin(point->x, val, e->key.dp->size) != MP_OKAY) 1457 goto done; 1458 val += e->key.dp->size; 1459 if (mp_read_unsigned_bin(point->y, val, e->key.dp->size) != MP_OKAY) 1460 goto done; 1461 mp_set(point->z, 1); 1462 1463 loaded = 1; 1464done: 1465 if (!loaded) { 1466 wc_ecc_del_point(point); 1467 point = NULL; 1468 } 1469 return (struct crypto_ec_point *) point; 1470} 1471 1472 1473int crypto_ec_point_add(struct crypto_ec *e, const struct crypto_ec_point *a, 1474 const struct crypto_ec_point *b, 1475 struct crypto_ec_point *c) 1476{ 1477 mp_int mu; 1478 ecc_point *ta = NULL, *tb = NULL; 1479 ecc_point *pa = (ecc_point *) a, *pb = (ecc_point *) b; 1480 mp_int *modulus = &e->prime; 1481 int ret; 1482 1483 if (TEST_FAIL()) 1484 return -1; 1485 1486 ret = mp_init(&mu); 1487 if (ret != MP_OKAY) 1488 return -1; 1489 1490 ret = mp_montgomery_calc_normalization(&mu, modulus); 1491 if (ret != MP_OKAY) { 1492 mp_clear(&mu); 1493 return -1; 1494 } 1495 1496 if (!mp_isone(&mu)) { 1497 ta = wc_ecc_new_point(); 1498 if (!ta) { 1499 mp_clear(&mu); 1500 return -1; 1501 } 1502 tb = wc_ecc_new_point(); 1503 if (!tb) { 1504 wc_ecc_del_point(ta); 1505 mp_clear(&mu); 1506 return -1; 1507 } 1508 1509 if (mp_mulmod(pa->x, &mu, modulus, ta->x) != MP_OKAY || 1510 mp_mulmod(pa->y, &mu, modulus, ta->y) != MP_OKAY || 1511 mp_mulmod(pa->z, &mu, modulus, ta->z) != MP_OKAY || 1512 mp_mulmod(pb->x, &mu, modulus, tb->x) != MP_OKAY || 1513 mp_mulmod(pb->y, &mu, modulus, tb->y) != MP_OKAY || 1514 mp_mulmod(pb->z, &mu, modulus, tb->z) != MP_OKAY) { 1515 ret = -1; 1516 goto end; 1517 } 1518 pa = ta; 1519 pb = tb; 1520 } 1521 1522 ret = ecc_projective_add_point(pa, pb, (ecc_point *) c, &e->a, 1523 &e->prime, e->mont_b); 1524 if (ret != 0) { 1525 ret = -1; 1526 goto end; 1527 } 1528 1529 if (ecc_map((ecc_point *) c, &e->prime, e->mont_b) != MP_OKAY) 1530 ret = -1; 1531 else 1532 ret = 0; 1533end: 1534 wc_ecc_del_point(tb); 1535 wc_ecc_del_point(ta); 1536 mp_clear(&mu); 1537 return ret; 1538} 1539 1540 1541int crypto_ec_point_mul(struct crypto_ec *e, const struct crypto_ec_point *p, 1542 const struct crypto_bignum *b, 1543 struct crypto_ec_point *res) 1544{ 1545 int ret; 1546 1547 if (TEST_FAIL()) 1548 return -1; 1549 1550 ret = wc_ecc_mulmod((mp_int *) b, (ecc_point *) p, (ecc_point *) res, 1551 &e->a, &e->prime, 1); 1552 return ret == 0 ? 0 : -1; 1553} 1554 1555 1556int crypto_ec_point_invert(struct crypto_ec *e, struct crypto_ec_point *p) 1557{ 1558 ecc_point *point = (ecc_point *) p; 1559 1560 if (TEST_FAIL()) 1561 return -1; 1562 1563 if (mp_sub(&e->prime, point->y, point->y) != MP_OKAY) 1564 return -1; 1565 1566 return 0; 1567} 1568 1569 1570int crypto_ec_point_solve_y_coord(struct crypto_ec *e, 1571 struct crypto_ec_point *p, 1572 const struct crypto_bignum *x, int y_bit) 1573{ 1574 byte buf[1 + 2 * MAX_ECC_BYTES]; 1575 int ret; 1576 int prime_len = crypto_ec_prime_len(e); 1577 1578 if (TEST_FAIL()) 1579 return -1; 1580 1581 buf[0] = y_bit ? ECC_POINT_COMP_ODD : ECC_POINT_COMP_EVEN; 1582 ret = crypto_bignum_to_bin(x, buf + 1, prime_len, prime_len); 1583 if (ret <= 0) 1584 return -1; 1585 ret = wc_ecc_import_point_der(buf, 1 + 2 * ret, e->key.idx, 1586 (ecc_point *) p); 1587 if (ret != 0) 1588 return -1; 1589 1590 return 0; 1591} 1592 1593 1594struct crypto_bignum * 1595crypto_ec_point_compute_y_sqr(struct crypto_ec *e, 1596 const struct crypto_bignum *x) 1597{ 1598 mp_int *y2 = NULL; 1599 mp_int t; 1600 int calced = 0; 1601 1602 if (TEST_FAIL()) 1603 return NULL; 1604 1605 if (mp_init(&t) != MP_OKAY) 1606 return NULL; 1607 1608 y2 = (mp_int *) crypto_bignum_init(); 1609 if (!y2) 1610 goto done; 1611 1612 if (mp_sqrmod((mp_int *) x, &e->prime, y2) != 0 || 1613 mp_mulmod((mp_int *) x, y2, &e->prime, y2) != 0 || 1614 mp_mulmod((mp_int *) x, &e->a, &e->prime, &t) != 0 || 1615 mp_addmod(y2, &t, &e->prime, y2) != 0 || 1616 mp_addmod(y2, &e->b, &e->prime, y2) != 0) 1617 goto done; 1618 1619 calced = 1; 1620done: 1621 if (!calced) { 1622 if (y2) { 1623 mp_clear(y2); 1624 os_free(y2); 1625 } 1626 mp_clear(&t); 1627 } 1628 1629 return (struct crypto_bignum *) y2; 1630} 1631 1632 1633int crypto_ec_point_is_at_infinity(struct crypto_ec *e, 1634 const struct crypto_ec_point *p) 1635{ 1636 return wc_ecc_point_is_at_infinity((ecc_point *) p); 1637} 1638 1639 1640int crypto_ec_point_is_on_curve(struct crypto_ec *e, 1641 const struct crypto_ec_point *p) 1642{ 1643 return wc_ecc_is_point((ecc_point *) p, &e->a, &e->b, &e->prime) == 1644 MP_OKAY; 1645} 1646 1647 1648int crypto_ec_point_cmp(const struct crypto_ec *e, 1649 const struct crypto_ec_point *a, 1650 const struct crypto_ec_point *b) 1651{ 1652 return wc_ecc_cmp_point((ecc_point *) a, (ecc_point *) b); 1653} 1654 1655 1656struct crypto_ecdh { 1657 struct crypto_ec *ec; 1658}; 1659 1660struct crypto_ecdh * crypto_ecdh_init(int group) 1661{ 1662 struct crypto_ecdh *ecdh = NULL; 1663 WC_RNG rng; 1664 int ret; 1665 1666 if (wc_InitRng(&rng) != 0) 1667 goto fail; 1668 1669 ecdh = os_zalloc(sizeof(*ecdh)); 1670 if (!ecdh) 1671 goto fail; 1672 1673 ecdh->ec = crypto_ec_init(group); 1674 if (!ecdh->ec) 1675 goto fail; 1676 1677 ret = wc_ecc_make_key_ex(&rng, ecdh->ec->key.dp->size, &ecdh->ec->key, 1678 ecdh->ec->key.dp->id); 1679 if (ret < 0) 1680 goto fail; 1681 1682done: 1683 wc_FreeRng(&rng); 1684 1685 return ecdh; 1686fail: 1687 crypto_ecdh_deinit(ecdh); 1688 ecdh = NULL; 1689 goto done; 1690} 1691 1692 1693void crypto_ecdh_deinit(struct crypto_ecdh *ecdh) 1694{ 1695 if (ecdh) { 1696 crypto_ec_deinit(ecdh->ec); 1697 os_free(ecdh); 1698 } 1699} 1700 1701 1702struct wpabuf * crypto_ecdh_get_pubkey(struct crypto_ecdh *ecdh, int inc_y) 1703{ 1704 struct wpabuf *buf = NULL; 1705 int ret; 1706 int len = ecdh->ec->key.dp->size; 1707 1708 buf = wpabuf_alloc(inc_y ? 2 * len : len); 1709 if (!buf) 1710 goto fail; 1711 1712 ret = crypto_bignum_to_bin((struct crypto_bignum *) 1713 ecdh->ec->key.pubkey.x, wpabuf_put(buf, len), 1714 len, len); 1715 if (ret < 0) 1716 goto fail; 1717 if (inc_y) { 1718 ret = crypto_bignum_to_bin((struct crypto_bignum *) 1719 ecdh->ec->key.pubkey.y, 1720 wpabuf_put(buf, len), len, len); 1721 if (ret < 0) 1722 goto fail; 1723 } 1724 1725done: 1726 return buf; 1727fail: 1728 wpabuf_free(buf); 1729 buf = NULL; 1730 goto done; 1731} 1732 1733 1734struct wpabuf * crypto_ecdh_set_peerkey(struct crypto_ecdh *ecdh, int inc_y, 1735 const u8 *key, size_t len) 1736{ 1737 int ret; 1738 struct wpabuf *pubkey = NULL; 1739 struct wpabuf *secret = NULL; 1740 word32 key_len = ecdh->ec->key.dp->size; 1741 ecc_point *point = NULL; 1742 size_t need_key_len = inc_y ? 2 * key_len : key_len; 1743 1744 if (len < need_key_len) 1745 goto fail; 1746 pubkey = wpabuf_alloc(1 + 2 * key_len); 1747 if (!pubkey) 1748 goto fail; 1749 wpabuf_put_u8(pubkey, inc_y ? ECC_POINT_UNCOMP : ECC_POINT_COMP_EVEN); 1750 wpabuf_put_data(pubkey, key, need_key_len); 1751 1752 point = wc_ecc_new_point(); 1753 if (!point) 1754 goto fail; 1755 1756 ret = wc_ecc_import_point_der(wpabuf_mhead(pubkey), 1 + 2 * key_len, 1757 ecdh->ec->key.idx, point); 1758 if (ret != MP_OKAY) 1759 goto fail; 1760 1761 secret = wpabuf_alloc(key_len); 1762 if (!secret) 1763 goto fail; 1764 1765 ret = wc_ecc_shared_secret_ex(&ecdh->ec->key, point, 1766 wpabuf_put(secret, key_len), &key_len); 1767 if (ret != MP_OKAY) 1768 goto fail; 1769 1770done: 1771 wc_ecc_del_point(point); 1772 wpabuf_free(pubkey); 1773 return secret; 1774fail: 1775 wpabuf_free(secret); 1776 secret = NULL; 1777 goto done; 1778} 1779 1780#endif /* CONFIG_ECC */ 1781