2 * WPA Supplicant / wrapper functions for libcrypto
3 * Copyright (c) 2004-2012, 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>
21 #include "dh_group5.h"
24 #if OPENSSL_VERSION_NUMBER < 0x00907000
25 #define DES_key_schedule des_key_schedule
26 #define DES_cblock des_cblock
27 #define DES_set_key(key, schedule) des_set_key((key), *(schedule))
28 #define DES_ecb_encrypt(input, output, ks, enc) \
29 des_ecb_encrypt((input), (output), *(ks), (enc))
30 #endif /* openssl < 0.9.7 */
32 static BIGNUM * get_group5_prime(void)
34 #if OPENSSL_VERSION_NUMBER < 0x00908000
35 static const unsigned char RFC3526_PRIME_1536[] = {
36 0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC9,0x0F,0xDA,0xA2,
37 0x21,0x68,0xC2,0x34,0xC4,0xC6,0x62,0x8B,0x80,0xDC,0x1C,0xD1,
38 0x29,0x02,0x4E,0x08,0x8A,0x67,0xCC,0x74,0x02,0x0B,0xBE,0xA6,
39 0x3B,0x13,0x9B,0x22,0x51,0x4A,0x08,0x79,0x8E,0x34,0x04,0xDD,
40 0xEF,0x95,0x19,0xB3,0xCD,0x3A,0x43,0x1B,0x30,0x2B,0x0A,0x6D,
41 0xF2,0x5F,0x14,0x37,0x4F,0xE1,0x35,0x6D,0x6D,0x51,0xC2,0x45,
42 0xE4,0x85,0xB5,0x76,0x62,0x5E,0x7E,0xC6,0xF4,0x4C,0x42,0xE9,
43 0xA6,0x37,0xED,0x6B,0x0B,0xFF,0x5C,0xB6,0xF4,0x06,0xB7,0xED,
44 0xEE,0x38,0x6B,0xFB,0x5A,0x89,0x9F,0xA5,0xAE,0x9F,0x24,0x11,
45 0x7C,0x4B,0x1F,0xE6,0x49,0x28,0x66,0x51,0xEC,0xE4,0x5B,0x3D,
46 0xC2,0x00,0x7C,0xB8,0xA1,0x63,0xBF,0x05,0x98,0xDA,0x48,0x36,
47 0x1C,0x55,0xD3,0x9A,0x69,0x16,0x3F,0xA8,0xFD,0x24,0xCF,0x5F,
48 0x83,0x65,0x5D,0x23,0xDC,0xA3,0xAD,0x96,0x1C,0x62,0xF3,0x56,
49 0x20,0x85,0x52,0xBB,0x9E,0xD5,0x29,0x07,0x70,0x96,0x96,0x6D,
50 0x67,0x0C,0x35,0x4E,0x4A,0xBC,0x98,0x04,0xF1,0x74,0x6C,0x08,
51 0xCA,0x23,0x73,0x27,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
53 return BN_bin2bn(RFC3526_PRIME_1536, sizeof(RFC3526_PRIME_1536), NULL);
54 #else /* openssl < 0.9.8 */
55 return get_rfc3526_prime_1536(NULL);
56 #endif /* openssl < 0.9.8 */
59 #if OPENSSL_VERSION_NUMBER < 0x00908000
60 #ifndef OPENSSL_NO_SHA256
62 #define NO_SHA256_WRAPPER
66 #endif /* openssl < 0.9.8 */
68 #ifdef OPENSSL_NO_SHA256
69 #define NO_SHA256_WRAPPER
72 static int openssl_digest_vector(const EVP_MD *type, int non_fips,
73 size_t num_elem, const u8 *addr[],
74 const size_t *len, u8 *mac)
80 EVP_MD_CTX_init(&ctx);
84 EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
85 #endif /* OPENSSL_FIPS */
86 #endif /* CONFIG_FIPS */
87 if (!EVP_DigestInit_ex(&ctx, type, NULL)) {
88 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestInit_ex failed: %s",
89 ERR_error_string(ERR_get_error(), NULL));
92 for (i = 0; i < num_elem; i++) {
93 if (!EVP_DigestUpdate(&ctx, addr[i], len[i])) {
94 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestUpdate "
96 ERR_error_string(ERR_get_error(), NULL));
100 if (!EVP_DigestFinal(&ctx, mac, &mac_len)) {
101 wpa_printf(MSG_ERROR, "OpenSSL: EVP_DigestFinal failed: %s",
102 ERR_error_string(ERR_get_error(), NULL));
110 int md4_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
112 return openssl_digest_vector(EVP_md4(), 0, num_elem, addr, len, mac);
116 void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
118 u8 pkey[8], next, tmp;
122 /* Add parity bits to the key */
124 for (i = 0; i < 7; i++) {
126 pkey[i] = (tmp >> i) | next | 1;
127 next = tmp << (7 - i);
131 DES_set_key(&pkey, &ks);
132 DES_ecb_encrypt((DES_cblock *) clear, (DES_cblock *) cypher, &ks,
137 int rc4_skip(const u8 *key, size_t keylen, size_t skip,
138 u8 *data, size_t data_len)
140 #ifdef OPENSSL_NO_RC4
142 #else /* OPENSSL_NO_RC4 */
146 unsigned char skip_buf[16];
148 EVP_CIPHER_CTX_init(&ctx);
149 if (!EVP_CIPHER_CTX_set_padding(&ctx, 0) ||
150 !EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, NULL, NULL, 1) ||
151 !EVP_CIPHER_CTX_set_key_length(&ctx, keylen) ||
152 !EVP_CipherInit_ex(&ctx, NULL, NULL, key, NULL, 1))
155 while (skip >= sizeof(skip_buf)) {
157 if (len > sizeof(skip_buf))
158 len = sizeof(skip_buf);
159 if (!EVP_CipherUpdate(&ctx, skip_buf, &outl, skip_buf, len))
164 if (EVP_CipherUpdate(&ctx, data, &outl, data, data_len))
168 EVP_CIPHER_CTX_cleanup(&ctx);
170 #endif /* OPENSSL_NO_RC4 */
174 int md5_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
176 return openssl_digest_vector(EVP_md5(), 0, num_elem, addr, len, mac);
181 int md5_vector_non_fips_allow(size_t num_elem, const u8 *addr[],
182 const size_t *len, u8 *mac)
184 return openssl_digest_vector(EVP_md5(), 1, num_elem, addr, len, mac);
186 #endif /* CONFIG_FIPS */
189 int sha1_vector(size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
191 return openssl_digest_vector(EVP_sha1(), 0, num_elem, addr, len, mac);
195 #ifndef NO_SHA256_WRAPPER
196 int sha256_vector(size_t num_elem, const u8 *addr[], const size_t *len,
199 return openssl_digest_vector(EVP_sha256(), 0, num_elem, addr, len,
202 #endif /* NO_SHA256_WRAPPER */
205 void * aes_encrypt_init(const u8 *key, size_t len)
208 ak = os_malloc(sizeof(*ak));
211 if (AES_set_encrypt_key(key, 8 * len, ak) < 0) {
219 void aes_encrypt(void *ctx, const u8 *plain, u8 *crypt)
221 AES_encrypt(plain, crypt, ctx);
225 void aes_encrypt_deinit(void *ctx)
231 void * aes_decrypt_init(const u8 *key, size_t len)
234 ak = os_malloc(sizeof(*ak));
237 if (AES_set_decrypt_key(key, 8 * len, ak) < 0) {
245 void aes_decrypt(void *ctx, const u8 *crypt, u8 *plain)
247 AES_decrypt(crypt, plain, ctx);
251 void aes_decrypt_deinit(void *ctx)
257 int crypto_mod_exp(const u8 *base, size_t base_len,
258 const u8 *power, size_t power_len,
259 const u8 *modulus, size_t modulus_len,
260 u8 *result, size_t *result_len)
262 BIGNUM *bn_base, *bn_exp, *bn_modulus, *bn_result;
270 bn_base = BN_bin2bn(base, base_len, NULL);
271 bn_exp = BN_bin2bn(power, power_len, NULL);
272 bn_modulus = BN_bin2bn(modulus, modulus_len, NULL);
273 bn_result = BN_new();
275 if (bn_base == NULL || bn_exp == NULL || bn_modulus == NULL ||
279 if (BN_mod_exp(bn_result, bn_base, bn_exp, bn_modulus, ctx) != 1)
282 *result_len = BN_bn2bin(bn_result, result);
295 struct crypto_cipher {
301 struct crypto_cipher * crypto_cipher_init(enum crypto_cipher_alg alg,
302 const u8 *iv, const u8 *key,
305 struct crypto_cipher *ctx;
306 const EVP_CIPHER *cipher;
308 ctx = os_zalloc(sizeof(*ctx));
313 #ifndef OPENSSL_NO_RC4
314 case CRYPTO_CIPHER_ALG_RC4:
317 #endif /* OPENSSL_NO_RC4 */
318 #ifndef OPENSSL_NO_AES
319 case CRYPTO_CIPHER_ALG_AES:
322 cipher = EVP_aes_128_cbc();
325 cipher = EVP_aes_192_cbc();
328 cipher = EVP_aes_256_cbc();
335 #endif /* OPENSSL_NO_AES */
336 #ifndef OPENSSL_NO_DES
337 case CRYPTO_CIPHER_ALG_3DES:
338 cipher = EVP_des_ede3_cbc();
340 case CRYPTO_CIPHER_ALG_DES:
341 cipher = EVP_des_cbc();
343 #endif /* OPENSSL_NO_DES */
344 #ifndef OPENSSL_NO_RC2
345 case CRYPTO_CIPHER_ALG_RC2:
346 cipher = EVP_rc2_ecb();
348 #endif /* OPENSSL_NO_RC2 */
354 EVP_CIPHER_CTX_init(&ctx->enc);
355 EVP_CIPHER_CTX_set_padding(&ctx->enc, 0);
356 if (!EVP_EncryptInit_ex(&ctx->enc, cipher, NULL, NULL, NULL) ||
357 !EVP_CIPHER_CTX_set_key_length(&ctx->enc, key_len) ||
358 !EVP_EncryptInit_ex(&ctx->enc, NULL, NULL, key, iv)) {
359 EVP_CIPHER_CTX_cleanup(&ctx->enc);
364 EVP_CIPHER_CTX_init(&ctx->dec);
365 EVP_CIPHER_CTX_set_padding(&ctx->dec, 0);
366 if (!EVP_DecryptInit_ex(&ctx->dec, cipher, NULL, NULL, NULL) ||
367 !EVP_CIPHER_CTX_set_key_length(&ctx->dec, key_len) ||
368 !EVP_DecryptInit_ex(&ctx->dec, NULL, NULL, key, iv)) {
369 EVP_CIPHER_CTX_cleanup(&ctx->enc);
370 EVP_CIPHER_CTX_cleanup(&ctx->dec);
379 int crypto_cipher_encrypt(struct crypto_cipher *ctx, const u8 *plain,
380 u8 *crypt, size_t len)
383 if (!EVP_EncryptUpdate(&ctx->enc, crypt, &outl, plain, len))
389 int crypto_cipher_decrypt(struct crypto_cipher *ctx, const u8 *crypt,
390 u8 *plain, size_t len)
394 if (!EVP_DecryptUpdate(&ctx->dec, plain, &outl, crypt, len))
400 void crypto_cipher_deinit(struct crypto_cipher *ctx)
402 EVP_CIPHER_CTX_cleanup(&ctx->enc);
403 EVP_CIPHER_CTX_cleanup(&ctx->dec);
408 void * dh5_init(struct wpabuf **priv, struct wpabuf **publ)
411 struct wpabuf *pubkey = NULL, *privkey = NULL;
412 size_t publen, privlen;
422 if (dh->g == NULL || BN_set_word(dh->g, 2) != 1)
425 dh->p = get_group5_prime();
429 if (DH_generate_key(dh) != 1)
432 publen = BN_num_bytes(dh->pub_key);
433 pubkey = wpabuf_alloc(publen);
436 privlen = BN_num_bytes(dh->priv_key);
437 privkey = wpabuf_alloc(privlen);
441 BN_bn2bin(dh->pub_key, wpabuf_put(pubkey, publen));
442 BN_bn2bin(dh->priv_key, wpabuf_put(privkey, privlen));
450 wpabuf_free(privkey);
456 void * dh5_init_fixed(const struct wpabuf *priv, const struct wpabuf *publ)
465 if (dh->g == NULL || BN_set_word(dh->g, 2) != 1)
468 dh->p = get_group5_prime();
472 dh->priv_key = BN_bin2bn(wpabuf_head(priv), wpabuf_len(priv), NULL);
473 if (dh->priv_key == NULL)
476 dh->pub_key = BN_bin2bn(wpabuf_head(publ), wpabuf_len(publ), NULL);
477 if (dh->pub_key == NULL)
480 if (DH_generate_key(dh) != 1)
491 struct wpabuf * dh5_derive_shared(void *ctx, const struct wpabuf *peer_public,
492 const struct wpabuf *own_private)
495 struct wpabuf *res = NULL;
503 pub_key = BN_bin2bn(wpabuf_head(peer_public), wpabuf_len(peer_public),
509 res = wpabuf_alloc(rlen);
513 keylen = DH_compute_key(wpabuf_mhead(res), pub_key, dh);
516 wpabuf_put(res, keylen);
528 void dh5_free(void *ctx)
543 struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
546 struct crypto_hash *ctx;
550 #ifndef OPENSSL_NO_MD5
551 case CRYPTO_HASH_ALG_HMAC_MD5:
554 #endif /* OPENSSL_NO_MD5 */
555 #ifndef OPENSSL_NO_SHA
556 case CRYPTO_HASH_ALG_HMAC_SHA1:
559 #endif /* OPENSSL_NO_SHA */
560 #ifndef OPENSSL_NO_SHA256
562 case CRYPTO_HASH_ALG_HMAC_SHA256:
565 #endif /* CONFIG_SHA256 */
566 #endif /* OPENSSL_NO_SHA256 */
571 ctx = os_zalloc(sizeof(*ctx));
575 #if OPENSSL_VERSION_NUMBER < 0x00909000
576 HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL);
577 #else /* openssl < 0.9.9 */
578 if (HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL) != 1) {
582 #endif /* openssl < 0.9.9 */
588 void crypto_hash_update(struct crypto_hash *ctx, const u8 *data, size_t len)
592 HMAC_Update(&ctx->ctx, data, len);
596 int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len)
604 if (mac == NULL || len == NULL) {
610 #if OPENSSL_VERSION_NUMBER < 0x00909000
611 HMAC_Final(&ctx->ctx, mac, &mdlen);
613 #else /* openssl < 0.9.9 */
614 res = HMAC_Final(&ctx->ctx, mac, &mdlen);
615 #endif /* openssl < 0.9.9 */
616 HMAC_CTX_cleanup(&ctx->ctx);