2 * Wrapper functions for OpenSSL libcrypto
3 * Copyright (c) 2004-2015, Jouni Malinen <j@w1.fi>
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
10 #include <openssl/opensslv.h>
11 #include <openssl/err.h>
12 #include <openssl/des.h>
13 #include <openssl/aes.h>
14 #include <openssl/bn.h>
15 #include <openssl/evp.h>
16 #include <openssl/dh.h>
17 #include <openssl/hmac.h>
18 #include <openssl/rand.h>
19 #ifdef CONFIG_OPENSSL_CMAC
20 #include <openssl/cmac.h>
21 #endif /* CONFIG_OPENSSL_CMAC */
23 #include <openssl/ec.h>
24 #endif /* CONFIG_ECC */
28 #include "dh_group5.h"
34 static BIGNUM * get_group5_prime(void)
36 #ifdef OPENSSL_IS_BORINGSSL
37 static const unsigned char RFC3526_PRIME_1536[] = {
38 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC9,0x0F,0xDA,0xA2,
39 0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B,0x80,0xDC,0x1C,0xD1,
40 0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74,0x02,0x0B,0xBE,0xA6,
41 0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79,0x8E,0x34,0x04,0xDD,
42 0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B,0x30,0x2B,0x0A,0x6D,
43 0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D,0x6D,0x51,0xC2,0x45,
44 0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6,0xF4,0x4C,0x42,0xE9,
45 0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6,0xF4,0x06,0xB7,0xED,
46 0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5,0xAE,0x9F,0x24,0x11,
47 0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51,0xEC,0xE4,0x5B,0x3D,
48 0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05,0x98,0xDA,0x48,0x36,
49 0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8,0xFD,0x24,0xCF,0x5F,
50 0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96,0x1C,0x62,0xF3,0x56,
51 0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07,0x70,0x96,0x96,0x6D,
52 0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04,0xF1,0x74,0x6C,0x08,
53 0xCA,0x23,0x73,0x27,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
55 return BN_bin2bn(RFC3526_PRIME_1536, sizeof(RFC3526_PRIME_1536), NULL);
56 #else /* OPENSSL_IS_BORINGSSL */
57 return get_rfc3526_prime_1536(NULL);
58 #endif /* OPENSSL_IS_BORINGSSL */
61 #ifdef OPENSSL_NO_SHA256
62 #define NO_SHA256_WRAPPER
65 static int openssl_digest_vector(const EVP_MD *type, size_t num_elem,
66 const u8 *addr[], const size_t *len, u8 *mac)
72 EVP_MD_CTX_init(&ctx);
73 if (!EVP_DigestInit_ex(&ctx, type, NULL)) {
74 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestInit_ex failed: %s",
75 ERR_error_string(ERR_get_error(), NULL));
78 for (i = 0; i < num_elem; i++) {
79 if (!EVP_DigestUpdate(&ctx, addr[i], len[i])) {
80 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestUpdate "
82 ERR_error_string(ERR_get_error(), NULL));
86 if (!EVP_DigestFinal(&ctx, mac, &mac_len)) {
87 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestFinal failed: %s",
88 ERR_error_string(ERR_get_error(), NULL));
96 int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
98 return openssl_digest_vector(EVP_md4(), num_elem, addr, len, mac);
102 void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
104 u8 pkey[8], next, tmp;
108 /* Add parity bits to the key */
110 for (i = 0; i < 7; i++) {
112 pkey[i] = (tmp >> i) | next | 1;
113 next = tmp << (7 - i);
117 DES_set_key((DES_cblock *) &pkey, &ks);
118 DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks,
123 int rc4_skip(const u8 *key, size_t keylen, size_t skip,
124 u8 *data, size_t data_len)
126 #ifdef OPENSSL_NO_RC4
128 #else /* OPENSSL_NO_RC4 */
132 unsigned char skip_buf[16];
134 EVP_CIPHER_CTX_init(&ctx);
135 if (!EVP_CIPHER_CTX_set_padding(&ctx, 0) ||
136 !EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, NULL, NULL, 1) ||
137 !EVP_CIPHER_CTX_set_key_length(&ctx, keylen) ||
138 !EVP_CipherInit_ex(&ctx, NULL, NULL, key, NULL, 1))
141 while (skip >= sizeof(skip_buf)) {
143 if (len > sizeof(skip_buf))
144 len = sizeof(skip_buf);
145 if (!EVP_CipherUpdate(&ctx, skip_buf, &outl, skip_buf, len))
150 if (EVP_CipherUpdate(&ctx, data, &outl, data, data_len))
154 EVP_CIPHER_CTX_cleanup(&ctx);
156 #endif /* OPENSSL_NO_RC4 */
160 int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
162 return openssl_digest_vector(EVP_md5(), num_elem, addr, len, mac);
166 int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
168 return openssl_digest_vector(EVP_sha1(), num_elem, addr, len, mac);
172 #ifndef NO_SHA256_WRAPPER
173 int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
176 return openssl_digest_vector(EVP_sha256(), num_elem, addr, len, mac);
178 #endif /* NO_SHA256_WRAPPER */
181 static const EVP_CIPHER * aes_get_evp_cipher(size_t keylen)
185 return EVP_aes_128_ecb();
186 #ifndef OPENSSL_IS_BORINGSSL
188 return EVP_aes_192_ecb();
189 #endif /* OPENSSL_IS_BORINGSSL */
191 return EVP_aes_256_ecb();
198 void * aes_encrypt_init(const u8 *key, size_t len)
201 const EVP_CIPHER *type;
203 type = aes_get_evp_cipher(len);
207 ctx = os_malloc(sizeof(*ctx));
210 EVP_CIPHER_CTX_init(ctx);
211 if (EVP_EncryptInit_ex(ctx, type, NULL, key, NULL) != 1) {
215 EVP_CIPHER_CTX_set_padding(ctx, 0);
220 void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
222 EVP_CIPHER_CTX *c = ctx;
224 if (EVP_EncryptUpdate(c, crypt, &clen, plain, 16) != 1) {
225 wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptUpdate failed: %s",
226 ERR_error_string(ERR_get_error(), NULL));
231 void aes_encrypt_deinit(void *ctx)
233 EVP_CIPHER_CTX *c = ctx;
235 int len = sizeof(buf);
236 if (EVP_EncryptFinal_ex(c, buf, &len) != 1) {
237 wpa_printf(MSG_ERROR, "OpenSSL: EVP_EncryptFinal_ex failed: "
238 "%s", ERR_error_string(ERR_get_error(), NULL));
241 wpa_printf(MSG_ERROR, "OpenSSL: Unexpected padding length %d "
242 "in AES encrypt", len);
244 EVP_CIPHER_CTX_cleanup(c);
245 bin_clear_free(c, sizeof(*c));
249 void * aes_decrypt_init(const u8 *key, size_t len)
252 const EVP_CIPHER *type;
254 type = aes_get_evp_cipher(len);
258 ctx = os_malloc(sizeof(*ctx));
261 EVP_CIPHER_CTX_init(ctx);
262 if (EVP_DecryptInit_ex(ctx, type, NULL, key, NULL) != 1) {
266 EVP_CIPHER_CTX_set_padding(ctx, 0);
271 void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
273 EVP_CIPHER_CTX *c = ctx;
275 if (EVP_DecryptUpdate(c, plain, &plen, crypt, 16) != 1) {
276 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptUpdate failed: %s",
277 ERR_error_string(ERR_get_error(), NULL));
282 void aes_decrypt_deinit(void *ctx)
284 EVP_CIPHER_CTX *c = ctx;
286 int len = sizeof(buf);
287 if (EVP_DecryptFinal_ex(c, buf, &len) != 1) {
288 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DecryptFinal_ex failed: "
289 "%s", ERR_error_string(ERR_get_error(), NULL));
292 wpa_printf(MSG_ERROR, "OpenSSL: Unexpected padding length %d "
293 "in AES decrypt", len);
295 EVP_CIPHER_CTX_cleanup(c);
296 bin_clear_free(c, sizeof(*c));
300 int aes_wrap(const u8 *kek, size_t kek_len, int n, const u8 *plain, u8 *cipher)
305 if (AES_set_encrypt_key(kek, kek_len << 3, &actx))
307 res = AES_wrap_key(&actx, NULL, cipher, plain, n * 8);
308 OPENSSL_cleanse(&actx, sizeof(actx));
309 return res <= 0 ? -1 : 0;
313 int aes_unwrap(const u8 *kek, size_t kek_len, int n, const u8 *cipher,
319 if (AES_set_decrypt_key(kek, kek_len << 3, &actx))
321 res = AES_unwrap_key(&actx, NULL, plain, cipher, (n + 1) * 8);
322 OPENSSL_cleanse(&actx, sizeof(actx));
323 return res <= 0 ? -1 : 0;
327 int crypto_mod_exp(const u8 *base, size_t base_len,
328 const u8 *power, size_t power_len,
329 const u8 *modulus, size_t modulus_len,
330 u8 *result, size_t *result_len)
332 BIGNUM *bn_base, *bn_exp, *bn_modulus, *bn_result;
340 bn_base = BN_bin2bn(base, base_len, NULL);
341 bn_exp = BN_bin2bn(power, power_len, NULL);
342 bn_modulus = BN_bin2bn(modulus, modulus_len, NULL);
343 bn_result = BN_new();
345 if (bn_base == NULL || bn_exp == NULL || bn_modulus == NULL ||
349 if (BN_mod_exp(bn_result, bn_base, bn_exp, bn_modulus, ctx) != 1)
352 *result_len = BN_bn2bin(bn_result, result);
356 BN_clear_free(bn_base);
357 BN_clear_free(bn_exp);
358 BN_clear_free(bn_modulus);
359 BN_clear_free(bn_result);
365 struct crypto_cipher {
371 struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
372 const u8 *iv, const u8 *key,
375 struct crypto_cipher *ctx;
376 const EVP_CIPHER *cipher;
378 ctx = os_zalloc(sizeof(*ctx));
383 #ifndef OPENSSL_NO_RC4
384 case CRYPTO_CIPHER_ALG_RC4:
387 #endif /* OPENSSL_NO_RC4 */
388 #ifndef OPENSSL_NO_AES
389 case CRYPTO_CIPHER_ALG_AES:
392 cipher = EVP_aes_128_cbc();
394 #ifndef OPENSSL_IS_BORINGSSL
396 cipher = EVP_aes_192_cbc();
398 #endif /* OPENSSL_IS_BORINGSSL */
400 cipher = EVP_aes_256_cbc();
407 #endif /* OPENSSL_NO_AES */
408 #ifndef OPENSSL_NO_DES
409 case CRYPTO_CIPHER_ALG_3DES:
410 cipher = EVP_des_ede3_cbc();
412 case CRYPTO_CIPHER_ALG_DES:
413 cipher = EVP_des_cbc();
415 #endif /* OPENSSL_NO_DES */
416 #ifndef OPENSSL_NO_RC2
417 case CRYPTO_CIPHER_ALG_RC2:
418 cipher = EVP_rc2_ecb();
420 #endif /* OPENSSL_NO_RC2 */
426 EVP_CIPHER_CTX_init(&ctx->enc);
427 EVP_CIPHER_CTX_set_padding(&ctx->enc, 0);
428 if (!EVP_EncryptInit_ex(&ctx->enc, cipher, NULL, NULL, NULL) ||
429 !EVP_CIPHER_CTX_set_key_length(&ctx->enc, key_len) ||
430 !EVP_EncryptInit_ex(&ctx->enc, NULL, NULL, key, iv)) {
431 EVP_CIPHER_CTX_cleanup(&ctx->enc);
436 EVP_CIPHER_CTX_init(&ctx->dec);
437 EVP_CIPHER_CTX_set_padding(&ctx->dec, 0);
438 if (!EVP_DecryptInit_ex(&ctx->dec, cipher, NULL, NULL, NULL) ||
439 !EVP_CIPHER_CTX_set_key_length(&ctx->dec, key_len) ||
440 !EVP_DecryptInit_ex(&ctx->dec, NULL, NULL, key, iv)) {
441 EVP_CIPHER_CTX_cleanup(&ctx->enc);
442 EVP_CIPHER_CTX_cleanup(&ctx->dec);
451 int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
452 u8 *crypt, size_t len)
455 if (!EVP_EncryptUpdate(&ctx->enc, crypt, &outl, plain, len))
461 int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
462 u8 *plain, size_t len)
466 if (!EVP_DecryptUpdate(&ctx->dec, plain, &outl, crypt, len))
472 void crypto_cipher_deinit(struct crypto_cipher *ctx)
474 EVP_CIPHER_CTX_cleanup(&ctx->enc);
475 EVP_CIPHER_CTX_cleanup(&ctx->dec);
480 void * dh5_init(struct wpabuf **priv, struct wpabuf **publ)
483 struct wpabuf *pubkey = NULL, *privkey = NULL;
484 size_t publen, privlen;
494 if (dh->g == NULL || BN_set_word(dh->g, 2) != 1)
497 dh->p = get_group5_prime();
501 if (DH_generate_key(dh) != 1)
504 publen = BN_num_bytes(dh->pub_key);
505 pubkey = wpabuf_alloc(publen);
508 privlen = BN_num_bytes(dh->priv_key);
509 privkey = wpabuf_alloc(privlen);
513 BN_bn2bin(dh->pub_key, wpabuf_put(pubkey, publen));
514 BN_bn2bin(dh->priv_key, wpabuf_put(privkey, privlen));
521 wpabuf_clear_free(pubkey);
522 wpabuf_clear_free(privkey);
528 void * dh5_init_fixed(const struct wpabuf *priv, const struct wpabuf *publ)
537 if (dh->g == NULL || BN_set_word(dh->g, 2) != 1)
540 dh->p = get_group5_prime();
544 dh->priv_key = BN_bin2bn(wpabuf_head(priv), wpabuf_len(priv), NULL);
545 if (dh->priv_key == NULL)
548 dh->pub_key = BN_bin2bn(wpabuf_head(publ), wpabuf_len(publ), NULL);
549 if (dh->pub_key == NULL)
552 if (DH_generate_key(dh) != 1)
563 struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public,
564 const struct wpabuf *own_private)
567 struct wpabuf *res = NULL;
575 pub_key = BN_bin2bn(wpabuf_head(peer_public), wpabuf_len(peer_public),
581 res = wpabuf_alloc(rlen);
585 keylen = DH_compute_key(wpabuf_mhead(res), pub_key, dh);
588 wpabuf_put(res, keylen);
589 BN_clear_free(pub_key);
594 BN_clear_free(pub_key);
595 wpabuf_clear_free(res);
600 void dh5_free(void *ctx)
615 struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
618 struct crypto_hash *ctx;
622 #ifndef OPENSSL_NO_MD5
623 case CRYPTO_HASH_ALG_HMAC_MD5:
626 #endif /* OPENSSL_NO_MD5 */
627 #ifndef OPENSSL_NO_SHA
628 case CRYPTO_HASH_ALG_HMAC_SHA1:
631 #endif /* OPENSSL_NO_SHA */
632 #ifndef OPENSSL_NO_SHA256
634 case CRYPTO_HASH_ALG_HMAC_SHA256:
637 #endif /* CONFIG_SHA256 */
638 #endif /* OPENSSL_NO_SHA256 */
643 ctx = os_zalloc(sizeof(*ctx));
646 HMAC_CTX_init(&ctx->ctx);
648 #if OPENSSL_VERSION_NUMBER < 0x00909000
649 HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL);
650 #else /* openssl < 0.9.9 */
651 if (HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL) != 1) {
652 bin_clear_free(ctx, sizeof(*ctx));
655 #endif /* openssl < 0.9.9 */
661 void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len)
665 HMAC_Update(&ctx->ctx, data, len);
669 int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len)
677 if (mac == NULL || len == NULL) {
678 bin_clear_free(ctx, sizeof(*ctx));
683 #if OPENSSL_VERSION_NUMBER < 0x00909000
684 HMAC_Final(&ctx->ctx, mac, &mdlen);
686 #else /* openssl < 0.9.9 */
687 res = HMAC_Final(&ctx->ctx, mac, &mdlen);
688 #endif /* openssl < 0.9.9 */
689 HMAC_CTX_cleanup(&ctx->ctx);
690 bin_clear_free(ctx, sizeof(*ctx));
701 static int openssl_hmac_vector(const EVP_MD *type, const u8 *key,
702 size_t key_len, size_t num_elem,
703 const u8 *addr[], const size_t *len, u8 *mac,
711 #if OPENSSL_VERSION_NUMBER < 0x00909000
712 HMAC_Init_ex(&ctx, key, key_len, type, NULL);
713 #else /* openssl < 0.9.9 */
714 if (HMAC_Init_ex(&ctx, key, key_len, type, NULL) != 1)
716 #endif /* openssl < 0.9.9 */
718 for (i = 0; i < num_elem; i++)
719 HMAC_Update(&ctx, addr[i], len[i]);
721 #if OPENSSL_VERSION_NUMBER < 0x00909000
722 HMAC_Final(&ctx, mac, &mdlen);
724 #else /* openssl < 0.9.9 */
725 res = HMAC_Final(&ctx, mac, &mdlen);
726 #endif /* openssl < 0.9.9 */
727 HMAC_CTX_cleanup(&ctx);
729 return res == 1 ? 0 : -1;
735 int hmac_md5_vector(const u8 *key, size_t key_len, size_t num_elem,
736 const u8 *addr[], const size_t *len, u8 *mac)
738 return openssl_hmac_vector(EVP_md5(), key ,key_len, num_elem, addr, len,
743 int hmac_md5(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
746 return hmac_md5_vector(key, key_len, 1, &data, &data_len, mac);
749 #endif /* CONFIG_FIPS */
752 int pbkdf2_sha1(const char *passphrase, const u8 *ssid, size_t ssid_len,
753 int iterations, u8 *buf, size_t buflen)
755 if (PKCS5_PBKDF2_HMAC_SHA1(passphrase, os_strlen(passphrase), ssid,
756 ssid_len, iterations, buflen, buf) != 1)
762 int hmac_sha1_vector(const u8 *key, size_t key_len, size_t num_elem,
763 const u8 *addr[], const size_t *len, u8 *mac)
765 return openssl_hmac_vector(EVP_sha1(), key, key_len, num_elem, addr,
770 int hmac_sha1(const u8 *key, size_t key_len, const u8 *data, size_t data_len,
773 return hmac_sha1_vector(key, key_len, 1, &data, &data_len, mac);
779 int hmac_sha256_vector(const u8 *key, size_t key_len, size_t num_elem,
780 const u8 *addr[], const size_t *len, u8 *mac)
782 return openssl_hmac_vector(EVP_sha256(), key, key_len, num_elem, addr,
787 int hmac_sha256(const u8 *key, size_t key_len, const u8 *data,
788 size_t data_len, u8 *mac)
790 return hmac_sha256_vector(key, key_len, 1, &data, &data_len, mac);
793 #endif /* CONFIG_SHA256 */
798 int hmac_sha384_vector(const u8 *key, size_t key_len, size_t num_elem,
799 const u8 *addr[], const size_t *len, u8 *mac)
801 return openssl_hmac_vector(EVP_sha384(), key, key_len, num_elem, addr,
806 int hmac_sha384(const u8 *key, size_t key_len, const u8 *data,
807 size_t data_len, u8 *mac)
809 return hmac_sha384_vector(key, key_len, 1, &data, &data_len, mac);
812 #endif /* CONFIG_SHA384 */
815 int crypto_get_random(void *buf, size_t len)
817 if (RAND_bytes(buf, len) != 1)
823 #ifdef CONFIG_OPENSSL_CMAC
824 int omac1_aes_vector(const u8 *key, size_t key_len, size_t num_elem,
825 const u8 *addr[], const size_t *len, u8 *mac)
831 ctx = CMAC_CTX_new();
836 if (!CMAC_Init(ctx, key, 32, EVP_aes_256_cbc(), NULL))
838 } else if (key_len == 16) {
839 if (!CMAC_Init(ctx, key, 16, EVP_aes_128_cbc(), NULL))
844 for (i = 0; i < num_elem; i++) {
845 if (!CMAC_Update(ctx, addr[i], len[i]))
848 if (!CMAC_Final(ctx, mac, &outlen) || outlen != 16)
858 int omac1_aes_128_vector(const u8 *key, size_t num_elem,
859 const u8 *addr[], const size_t *len, u8 *mac)
861 return omac1_aes_vector(key, 16, num_elem, addr, len, mac);
865 int omac1_aes_128(const u8 *key, const u8 *data, size_t data_len, u8 *mac)
867 return omac1_aes_128_vector(key, 1, &data, &data_len, mac);
871 int omac1_aes_256(const u8 *key, const u8 *data, size_t data_len, u8 *mac)
873 return omac1_aes_vector(key, 32, 1, &data, &data_len, mac);
875 #endif /* CONFIG_OPENSSL_CMAC */
878 struct crypto_bignum * crypto_bignum_init(void)
880 return (struct crypto_bignum *) BN_new();
884 struct crypto_bignum * crypto_bignum_init_set(const u8 *buf, size_t len)
886 BIGNUM *bn = BN_bin2bn(buf, len, NULL);
887 return (struct crypto_bignum *) bn;
891 void crypto_bignum_deinit(struct crypto_bignum *n, int clear)
894 BN_clear_free((BIGNUM *) n);
896 BN_free((BIGNUM *) n);
900 int crypto_bignum_to_bin(const struct crypto_bignum *a,
901 u8 *buf, size_t buflen, size_t padlen)
903 int num_bytes, offset;
908 num_bytes = BN_num_bytes((const BIGNUM *) a);
909 if ((size_t) num_bytes > buflen)
911 if (padlen > (size_t) num_bytes)
912 offset = padlen - num_bytes;
916 os_memset(buf, 0, offset);
917 BN_bn2bin((const BIGNUM *) a, buf + offset);
919 return num_bytes + offset;
923 int crypto_bignum_add(const struct crypto_bignum *a,
924 const struct crypto_bignum *b,
925 struct crypto_bignum *c)
927 return BN_add((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b) ?
932 int crypto_bignum_mod(const struct crypto_bignum *a,
933 const struct crypto_bignum *b,
934 struct crypto_bignum *c)
939 bnctx = BN_CTX_new();
942 res = BN_mod((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b,
950 int crypto_bignum_exptmod(const struct crypto_bignum *a,
951 const struct crypto_bignum *b,
952 const struct crypto_bignum *c,
953 struct crypto_bignum *d)
958 bnctx = BN_CTX_new();
961 res = BN_mod_exp((BIGNUM *) d, (const BIGNUM *) a, (const BIGNUM *) b,
962 (const BIGNUM *) c, bnctx);
969 int crypto_bignum_inverse(const struct crypto_bignum *a,
970 const struct crypto_bignum *b,
971 struct crypto_bignum *c)
976 bnctx = BN_CTX_new();
979 res = BN_mod_inverse((BIGNUM *) c, (const BIGNUM *) a,
980 (const BIGNUM *) b, bnctx);
987 int crypto_bignum_sub(const struct crypto_bignum *a,
988 const struct crypto_bignum *b,
989 struct crypto_bignum *c)
991 return BN_sub((BIGNUM *) c, (const BIGNUM *) a, (const BIGNUM *) b) ?
996 int crypto_bignum_div(const struct crypto_bignum *a,
997 const struct crypto_bignum *b,
998 struct crypto_bignum *c)
1004 bnctx = BN_CTX_new();
1007 res = BN_div((BIGNUM *) c, NULL, (const BIGNUM *) a,
1008 (const BIGNUM *) b, bnctx);
1011 return res ? 0 : -1;
1015 int crypto_bignum_mulmod(const struct crypto_bignum *a,
1016 const struct crypto_bignum *b,
1017 const struct crypto_bignum *c,
1018 struct crypto_bignum *d)
1024 bnctx = BN_CTX_new();
1027 res = BN_mod_mul((BIGNUM *) d, (const BIGNUM *) a, (const BIGNUM *) b,
1028 (const BIGNUM *) c, bnctx);
1031 return res ? 0 : -1;
1035 int crypto_bignum_cmp(const struct crypto_bignum *a,
1036 const struct crypto_bignum *b)
1038 return BN_cmp((const BIGNUM *) a, (const BIGNUM *) b);
1042 int crypto_bignum_bits(const struct crypto_bignum *a)
1044 return BN_num_bits((const BIGNUM *) a);
1048 int crypto_bignum_is_zero(const struct crypto_bignum *a)
1050 return BN_is_zero((const BIGNUM *) a);
1054 int crypto_bignum_is_one(const struct crypto_bignum *a)
1056 return BN_is_one((const BIGNUM *) a);
1069 struct crypto_ec * crypto_ec_init(int group)
1071 struct crypto_ec *e;
1074 /* Map from IANA registry for IKE D-H groups to OpenSSL NID */
1077 nid = NID_X9_62_prime256v1;
1080 nid = NID_secp384r1;
1083 nid = NID_secp521r1;
1086 nid = NID_X9_62_prime192v1;
1089 nid = NID_secp224r1;
1095 e = os_zalloc(sizeof(*e));
1099 e->bnctx = BN_CTX_new();
1100 e->group = EC_GROUP_new_by_curve_name(nid);
1101 e->prime = BN_new();
1102 e->order = BN_new();
1103 if (e->group == NULL || e->bnctx == NULL || e->prime == NULL ||
1105 !EC_GROUP_get_curve_GFp(e->group, e->prime, NULL, NULL, e->bnctx) ||
1106 !EC_GROUP_get_order(e->group, e->order, e->bnctx)) {
1107 crypto_ec_deinit(e);
1115 void crypto_ec_deinit(struct crypto_ec *e)
1119 BN_clear_free(e->order);
1120 BN_clear_free(e->prime);
1121 EC_GROUP_free(e->group);
1122 BN_CTX_free(e->bnctx);
1127 struct crypto_ec_point * crypto_ec_point_init(struct crypto_ec *e)
1131 return (struct crypto_ec_point *) EC_POINT_new(e->group);
1135 size_t crypto_ec_prime_len(struct crypto_ec *e)
1137 return BN_num_bytes(e->prime);
1141 size_t crypto_ec_prime_len_bits(struct crypto_ec *e)
1143 return BN_num_bits(e->prime);
1147 const struct crypto_bignum * crypto_ec_get_prime(struct crypto_ec *e)
1149 return (const struct crypto_bignum *) e->prime;
1153 const struct crypto_bignum * crypto_ec_get_order(struct crypto_ec *e)
1155 return (const struct crypto_bignum *) e->order;
1159 void crypto_ec_point_deinit(struct crypto_ec_point *p, int clear)
1162 EC_POINT_clear_free((EC_POINT *) p);
1164 EC_POINT_free((EC_POINT *) p);
1168 int crypto_ec_point_to_bin(struct crypto_ec *e,
1169 const struct crypto_ec_point *point, u8 *x, u8 *y)
1171 BIGNUM *x_bn, *y_bn;
1173 int len = BN_num_bytes(e->prime);
1179 EC_POINT_get_affine_coordinates_GFp(e->group, (EC_POINT *) point,
1180 x_bn, y_bn, e->bnctx)) {
1182 crypto_bignum_to_bin((struct crypto_bignum *) x_bn,
1186 crypto_bignum_to_bin((struct crypto_bignum *) y_bn,
1192 BN_clear_free(x_bn);
1193 BN_clear_free(y_bn);
1198 struct crypto_ec_point * crypto_ec_point_from_bin(struct crypto_ec *e,
1203 int len = BN_num_bytes(e->prime);
1205 x = BN_bin2bn(val, len, NULL);
1206 y = BN_bin2bn(val + len, len, NULL);
1207 elem = EC_POINT_new(e->group);
1208 if (x == NULL || y == NULL || elem == NULL) {
1211 EC_POINT_clear_free(elem);
1215 if (!EC_POINT_set_affine_coordinates_GFp(e->group, elem, x, y,
1217 EC_POINT_clear_free(elem);
1224 return (struct crypto_ec_point *) elem;
1228 int crypto_ec_point_add(struct crypto_ec *e, const struct crypto_ec_point *a,
1229 const struct crypto_ec_point *b,
1230 struct crypto_ec_point *c)
1232 return EC_POINT_add(e->group, (EC_POINT *) c, (const EC_POINT *) a,
1233 (const EC_POINT *) b, e->bnctx) ? 0 : -1;
1237 int crypto_ec_point_mul(struct crypto_ec *e, const struct crypto_ec_point *p,
1238 const struct crypto_bignum *b,
1239 struct crypto_ec_point *res)
1241 return EC_POINT_mul(e->group, (EC_POINT *) res, NULL,
1242 (const EC_POINT *) p, (const BIGNUM *) b, e->bnctx)
1247 int crypto_ec_point_invert(struct crypto_ec *e, struct crypto_ec_point *p)
1249 return EC_POINT_invert(e->group, (EC_POINT *) p, e->bnctx) ? 0 : -1;
1253 int crypto_ec_point_solve_y_coord(struct crypto_ec *e,
1254 struct crypto_ec_point *p,
1255 const struct crypto_bignum *x, int y_bit)
1257 if (!EC_POINT_set_compressed_coordinates_GFp(e->group, (EC_POINT *) p,
1258 (const BIGNUM *) x, y_bit,
1260 !EC_POINT_is_on_curve(e->group, (EC_POINT *) p, e->bnctx))
1266 int crypto_ec_point_is_at_infinity(struct crypto_ec *e,
1267 const struct crypto_ec_point *p)
1269 return EC_POINT_is_at_infinity(e->group, (const EC_POINT *) p);
1273 int crypto_ec_point_is_on_curve(struct crypto_ec *e,
1274 const struct crypto_ec_point *p)
1276 return EC_POINT_is_on_curve(e->group, (const EC_POINT *) p, e->bnctx);
1279 #endif /* CONFIG_ECC */