2
* WPA Supplicant / SSL/TLS interface functions for openssl
3
* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
5
* This program is free software; you can redistribute it and/or modify
6
* it under the terms of the GNU General Public License version 2 as
7
* published by the Free Software Foundation.
9
* Alternatively, this software may be distributed under the terms of BSD
12
* See README and COPYING for more details.
17
#ifndef CONFIG_SMARTCARD
18
#ifndef OPENSSL_NO_ENGINE
19
#define OPENSSL_NO_ENGINE
23
#include <openssl/ssl.h>
24
#include <openssl/err.h>
25
#include <openssl/pkcs12.h>
26
#include <openssl/x509v3.h>
27
#ifndef OPENSSL_NO_ENGINE
28
#include <openssl/engine.h>
29
#endif /* OPENSSL_NO_ENGINE */
34
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
35
#define OPENSSL_d2i_TYPE const unsigned char **
37
#define OPENSSL_d2i_TYPE unsigned char **
40
static int tls_openssl_ref_count = 0;
42
struct tls_connection {
44
BIO *ssl_in, *ssl_out;
45
#ifndef OPENSSL_NO_ENGINE
46
ENGINE *engine; /* functional reference to the engine */
47
EVP_PKEY *private_key; /* the private key if using engine */
48
#endif /* OPENSSL_NO_ENGINE */
49
char *subject_match, *altsubject_match;
50
int read_alerts, write_alerts, failed;
52
u8 *pre_shared_secret;
53
size_t pre_shared_secret_len;
57
#ifdef CONFIG_NO_STDOUT_DEBUG
59
static void _tls_show_errors(void)
63
while ((err = ERR_get_error())) {
64
/* Just ignore the errors, since stdout is disabled */
67
#define tls_show_errors(l, f, t) _tls_show_errors()
69
#else /* CONFIG_NO_STDOUT_DEBUG */
71
static void tls_show_errors(int level, const char *func, const char *txt)
75
wpa_printf(level, "OpenSSL: %s - %s %s",
76
func, txt, ERR_error_string(ERR_get_error(), NULL));
78
while ((err = ERR_get_error())) {
79
wpa_printf(MSG_INFO, "OpenSSL: pending error: %s",
80
ERR_error_string(err, NULL));
84
#endif /* CONFIG_NO_STDOUT_DEBUG */
87
#ifdef CONFIG_NATIVE_WINDOWS
89
/* Windows CryptoAPI and access to certificate stores */
92
#ifdef __MINGW32_VERSION
94
* MinGW does not yet include all the needed definitions for CryptoAPI, so
95
* define here whatever extra is needed.
97
#define CALG_SSL3_SHAMD5 (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SSL3SHAMD5)
98
#define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
99
#define CERT_STORE_READONLY_FLAG 0x00008000
100
#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
101
#define CRYPT_ACQUIRE_COMPARE_KEY_FLAG 0x00000004
104
(*CryptAcquireCertificatePrivateKey)(PCCERT_CONTEXT pCert, DWORD dwFlags,
105
void *pvReserved, HCRYPTPROV *phCryptProv,
106
DWORD *pdwKeySpec, BOOL *pfCallerFreeProv)
107
= NULL; /* to be loaded from crypt32.dll */
109
static PCCERT_CONTEXT WINAPI
110
(*CertEnumCertificatesInStore)(HCERTSTORE hCertStore,
111
PCCERT_CONTEXT pPrevCertContext)
112
= NULL; /* to be loaded from crypt32.dll */
114
static int mingw_load_crypto_func(void)
118
/* MinGW does not yet have full CryptoAPI support, so load the needed
121
if (CryptAcquireCertificatePrivateKey)
124
dll = LoadLibrary("crypt32");
126
wpa_printf(MSG_DEBUG, "CryptoAPI: Could not load crypt32 "
131
CryptAcquireCertificatePrivateKey = GetProcAddress(
132
dll, "CryptAcquireCertificatePrivateKey");
133
if (CryptAcquireCertificatePrivateKey == NULL) {
134
wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
135
"CryptAcquireCertificatePrivateKey() address from "
140
CertEnumCertificatesInStore = (void *) GetProcAddress(
141
dll, "CertEnumCertificatesInStore");
142
if (CertEnumCertificatesInStore == NULL) {
143
wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
144
"CertEnumCertificatesInStore() address from "
152
#else /* __MINGW32_VERSION */
154
static int mingw_load_crypto_func(void)
159
#endif /* __MINGW32_VERSION */
162
struct cryptoapi_rsa_data {
163
const CERT_CONTEXT *cert;
164
HCRYPTPROV crypt_prov;
166
BOOL free_crypt_prov;
170
static void cryptoapi_error(const char *msg)
172
wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u",
173
msg, (unsigned int) GetLastError());
177
static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from,
178
unsigned char *to, RSA *rsa, int padding)
180
wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
185
static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from,
186
unsigned char *to, RSA *rsa, int padding)
188
wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
193
static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from,
194
unsigned char *to, RSA *rsa, int padding)
196
struct cryptoapi_rsa_data *priv =
197
(struct cryptoapi_rsa_data *) rsa->meth->app_data;
199
DWORD hash_size, len, i;
200
unsigned char *buf = NULL;
204
RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
205
ERR_R_PASSED_NULL_PARAMETER);
209
if (padding != RSA_PKCS1_PADDING) {
210
RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
211
RSA_R_UNKNOWN_PADDING_TYPE);
215
if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) {
216
wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported",
218
RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
219
RSA_R_INVALID_MESSAGE_LENGTH);
223
if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash))
225
cryptoapi_error("CryptCreateHash failed");
229
len = sizeof(hash_size);
230
if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len,
232
cryptoapi_error("CryptGetHashParam failed");
236
if ((int) hash_size != flen) {
237
wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)",
238
(unsigned) hash_size, flen);
239
RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT,
240
RSA_R_INVALID_MESSAGE_LENGTH);
243
if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) {
244
cryptoapi_error("CryptSetHashParam failed");
249
buf = os_malloc(len);
251
RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE);
255
if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) {
256
cryptoapi_error("CryptSignHash failed");
260
for (i = 0; i < len; i++)
261
to[i] = buf[len - i - 1];
266
CryptDestroyHash(hash);
272
static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from,
273
unsigned char *to, RSA *rsa, int padding)
275
wpa_printf(MSG_DEBUG, "%s - not implemented", __func__);
280
static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv)
284
if (priv->crypt_prov && priv->free_crypt_prov)
285
CryptReleaseContext(priv->crypt_prov, 0);
287
CertFreeCertificateContext(priv->cert);
292
static int cryptoapi_finish(RSA *rsa)
294
cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data);
295
os_free((void *) rsa->meth);
301
static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store)
304
const CERT_CONTEXT *ret = NULL;
306
cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0,
307
store | CERT_STORE_OPEN_EXISTING_FLAG |
308
CERT_STORE_READONLY_FLAG, L"MY");
310
cryptoapi_error("Failed to open 'My system store'");
314
if (strncmp(name, "cert://", 7) == 0) {
315
unsigned short wbuf[255];
316
MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255);
317
ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING |
319
0, CERT_FIND_SUBJECT_STR,
321
} else if (strncmp(name, "hash://", 7) == 0) {
322
CRYPT_HASH_BLOB blob;
324
const char *hash = name + 7;
327
len = os_strlen(hash) / 2;
328
buf = os_malloc(len);
329
if (buf && hexstr2bin(hash, buf, len) == 0) {
332
ret = CertFindCertificateInStore(cs,
341
CertCloseStore(cs, 0);
347
static int tls_cryptoapi_cert(SSL *ssl, const char *name)
350
RSA *rsa = NULL, *pub_rsa;
351
struct cryptoapi_rsa_data *priv;
352
RSA_METHOD *rsa_meth;
355
(strncmp(name, "cert://", 7) != 0 &&
356
strncmp(name, "hash://", 7) != 0))
359
priv = os_zalloc(sizeof(*priv));
360
rsa_meth = os_zalloc(sizeof(*rsa_meth));
361
if (priv == NULL || rsa_meth == NULL) {
362
wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory "
363
"for CryptoAPI RSA method");
369
priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER);
370
if (priv->cert == NULL) {
371
priv->cert = cryptoapi_find_cert(
372
name, CERT_SYSTEM_STORE_LOCAL_MACHINE);
374
if (priv->cert == NULL) {
375
wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate "
380
cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded,
381
priv->cert->cbCertEncoded);
383
wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER "
388
if (mingw_load_crypto_func())
391
if (!CryptAcquireCertificatePrivateKey(priv->cert,
392
CRYPT_ACQUIRE_COMPARE_KEY_FLAG,
393
NULL, &priv->crypt_prov,
395
&priv->free_crypt_prov)) {
396
cryptoapi_error("Failed to acquire a private key for the "
401
rsa_meth->name = "Microsoft CryptoAPI RSA Method";
402
rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc;
403
rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec;
404
rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc;
405
rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec;
406
rsa_meth->finish = cryptoapi_finish;
407
rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK;
408
rsa_meth->app_data = (char *) priv;
412
SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE,
413
ERR_R_MALLOC_FAILURE);
417
if (!SSL_use_certificate(ssl, cert)) {
422
pub_rsa = cert->cert_info->key->pkey->pkey.rsa;
426
rsa->n = BN_dup(pub_rsa->n);
427
rsa->e = BN_dup(pub_rsa->e);
428
if (!RSA_set_method(rsa, rsa_meth))
431
if (!SSL_use_RSAPrivateKey(ssl, rsa))
444
cryptoapi_free_data(priv);
450
static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name)
453
PCCERT_CONTEXT ctx = NULL;
461
if (mingw_load_crypto_func())
464
if (name == NULL || strncmp(name, "cert_store://", 13) != 0)
469
wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR));
472
wsprintf(wstore, L"%S", store);
473
cs = CertOpenSystemStore(0, wstore);
476
cs = CertOpenSystemStore(0, store);
479
wpa_printf(MSG_DEBUG, "%s: failed to open system cert store "
480
"'%s': error=%d", __func__, store,
481
(int) GetLastError());
485
while ((ctx = CertEnumCertificatesInStore(cs, ctx))) {
486
cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded,
489
wpa_printf(MSG_INFO, "CryptoAPI: Could not process "
490
"X509 DER encoding for CA cert");
494
X509_NAME_oneline(X509_get_subject_name(cert), buf,
496
wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for "
497
"system certificate store: subject='%s'", buf);
499
if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
500
tls_show_errors(MSG_WARNING, __func__,
501
"Failed to add ca_cert to OpenSSL "
502
"certificate store");
508
if (!CertCloseStore(cs, 0)) {
509
wpa_printf(MSG_DEBUG, "%s: failed to close system cert store "
510
"'%s': error=%d", __func__, name + 13,
511
(int) GetLastError());
518
#else /* CONFIG_NATIVE_WINDOWS */
520
static int tls_cryptoapi_cert(SSL *ssl, const char *name)
525
#endif /* CONFIG_NATIVE_WINDOWS */
528
static void ssl_info_cb(const SSL *ssl, int where, int ret)
533
wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret);
534
w = where & ~SSL_ST_MASK;
535
if (w & SSL_ST_CONNECT)
537
else if (w & SSL_ST_ACCEPT)
542
if (where & SSL_CB_LOOP) {
543
wpa_printf(MSG_DEBUG, "SSL: %s:%s",
544
str, SSL_state_string_long(ssl));
545
} else if (where & SSL_CB_ALERT) {
546
wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
547
where & SSL_CB_READ ?
548
"read (remote end reported an error)" :
549
"write (local SSL3 detected an error)",
550
SSL_alert_type_string_long(ret),
551
SSL_alert_desc_string_long(ret));
552
if ((ret >> 8) == SSL3_AL_FATAL) {
553
struct tls_connection *conn =
554
SSL_get_app_data((SSL *) ssl);
555
if (where & SSL_CB_READ)
558
conn->write_alerts++;
560
} else if (where & SSL_CB_EXIT && ret <= 0) {
561
wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
562
str, ret == 0 ? "failed" : "error",
563
SSL_state_string_long(ssl));
568
#ifndef OPENSSL_NO_ENGINE
570
* tls_engine_load_dynamic_generic - load any openssl engine
571
* @pre: an array of commands and values that load an engine initialized
572
* in the engine specific function
573
* @post: an array of commands and values that initialize an already loaded
574
* engine (or %NULL if not required)
575
* @id: the engine id of the engine to load (only required if post is not %NULL
577
* This function is a generic function that loads any openssl engine.
579
* Returns: 0 on success, -1 on failure
581
static int tls_engine_load_dynamic_generic(const char *pre[],
582
const char *post[], const char *id)
585
const char *dynamic_id = "dynamic";
587
engine = ENGINE_by_id(id);
590
wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already "
596
engine = ENGINE_by_id(dynamic_id);
597
if (engine == NULL) {
598
wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
600
ERR_error_string(ERR_get_error(), NULL));
604
/* Perform the pre commands. This will load the engine. */
605
while (pre && pre[0]) {
606
wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]);
607
if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) {
608
wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: "
609
"%s %s [%s]", pre[0], pre[1],
610
ERR_error_string(ERR_get_error(), NULL));
618
* Free the reference to the "dynamic" engine. The loaded engine can
619
* now be looked up using ENGINE_by_id().
623
engine = ENGINE_by_id(id);
624
if (engine == NULL) {
625
wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]",
626
id, ERR_error_string(ERR_get_error(), NULL));
630
while (post && post[0]) {
631
wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]);
632
if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) {
633
wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:"
634
" %s %s [%s]", post[0], post[1],
635
ERR_error_string(ERR_get_error(), NULL));
636
ENGINE_remove(engine);
649
* tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc
650
* @pkcs11_so_path: pksc11_so_path from the configuration
651
* @pcks11_module_path: pkcs11_module_path from the configuration
653
static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path,
654
const char *pkcs11_module_path)
656
char *engine_id = "pkcs11";
657
const char *pre_cmd[] = {
658
"SO_PATH", NULL /* pkcs11_so_path */,
659
"ID", NULL /* engine_id */,
661
/* "NO_VCHECK", "1", */
665
const char *post_cmd[] = {
666
"MODULE_PATH", NULL /* pkcs11_module_path */,
670
if (!pkcs11_so_path || !pkcs11_module_path)
673
pre_cmd[1] = pkcs11_so_path;
674
pre_cmd[3] = engine_id;
675
post_cmd[1] = pkcs11_module_path;
677
wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s",
680
return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id);
685
* tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc
686
* @opensc_so_path: opensc_so_path from the configuration
688
static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
690
char *engine_id = "opensc";
691
const char *pre_cmd[] = {
692
"SO_PATH", NULL /* opensc_so_path */,
693
"ID", NULL /* engine_id */,
702
pre_cmd[1] = opensc_so_path;
703
pre_cmd[3] = engine_id;
705
wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s",
708
return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id);
710
#endif /* OPENSSL_NO_ENGINE */
713
void * tls_init(const struct tls_config *conf)
717
if (tls_openssl_ref_count == 0) {
718
SSL_load_error_strings();
720
/* TODO: if /dev/urandom is available, PRNG is seeded
721
* automatically. If this is not the case, random data should
726
#endif /* PKCS12_FUNCS */
728
tls_openssl_ref_count++;
730
ssl = SSL_CTX_new(TLSv1_method());
734
SSL_CTX_set_info_callback(ssl, ssl_info_cb);
736
#ifndef OPENSSL_NO_ENGINE
738
(conf->opensc_engine_path || conf->pkcs11_engine_path ||
739
conf->pkcs11_module_path)) {
740
wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine");
741
ERR_load_ENGINE_strings();
742
ENGINE_load_dynamic();
744
if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) ||
745
tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path,
746
conf->pkcs11_module_path)) {
751
#endif /* OPENSSL_NO_ENGINE */
757
void tls_deinit(void *ssl_ctx)
759
SSL_CTX *ssl = ssl_ctx;
762
tls_openssl_ref_count--;
763
if (tls_openssl_ref_count == 0) {
764
#ifndef OPENSSL_NO_ENGINE
766
#endif /* OPENSSL_NO_ENGINE */
773
static int tls_engine_init(struct tls_connection *conn, const char *engine_id,
774
const char *pin, const char *key_id)
776
#ifndef OPENSSL_NO_ENGINE
778
if (engine_id == NULL) {
779
wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set");
783
wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set");
786
if (key_id == NULL) {
787
wpa_printf(MSG_ERROR, "ENGINE: Key Id not set");
792
conn->engine = ENGINE_by_id(engine_id);
794
wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]",
795
engine_id, ERR_error_string(ERR_get_error(), NULL));
798
if (ENGINE_init(conn->engine) != 1) {
799
wpa_printf(MSG_ERROR, "ENGINE: engine init failed "
800
"(engine: %s) [%s]", engine_id,
801
ERR_error_string(ERR_get_error(), NULL));
804
wpa_printf(MSG_DEBUG, "ENGINE: engine initialized");
806
if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) {
807
wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]",
808
ERR_error_string(ERR_get_error(), NULL));
811
conn->private_key = ENGINE_load_private_key(conn->engine,
813
if (!conn->private_key) {
814
wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id"
815
" '%s' [%s]", key_id,
816
ERR_error_string(ERR_get_error(), NULL));
817
ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED;
824
ENGINE_free(conn->engine);
828
if (conn->private_key) {
829
EVP_PKEY_free(conn->private_key);
830
conn->private_key = NULL;
834
#else /* OPENSSL_NO_ENGINE */
836
#endif /* OPENSSL_NO_ENGINE */
840
static void tls_engine_deinit(struct tls_connection *conn)
842
#ifndef OPENSSL_NO_ENGINE
843
wpa_printf(MSG_DEBUG, "ENGINE: engine deinit");
844
if (conn->private_key) {
845
EVP_PKEY_free(conn->private_key);
846
conn->private_key = NULL;
849
ENGINE_finish(conn->engine);
852
#endif /* OPENSSL_NO_ENGINE */
856
int tls_get_errors(void *ssl_ctx)
861
while ((err = ERR_get_error())) {
862
wpa_printf(MSG_INFO, "TLS - SSL error: %s",
863
ERR_error_string(err, NULL));
870
struct tls_connection * tls_connection_init(void *ssl_ctx)
872
SSL_CTX *ssl = ssl_ctx;
873
struct tls_connection *conn;
875
conn = os_zalloc(sizeof(*conn));
878
conn->ssl = SSL_new(ssl);
879
if (conn->ssl == NULL) {
880
tls_show_errors(MSG_INFO, __func__,
881
"Failed to initialize new SSL connection");
886
SSL_set_app_data(conn->ssl, conn);
887
SSL_set_options(conn->ssl,
888
SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
889
SSL_OP_SINGLE_DH_USE);
891
conn->ssl_in = BIO_new(BIO_s_mem());
893
tls_show_errors(MSG_INFO, __func__,
894
"Failed to create a new BIO for ssl_in");
900
conn->ssl_out = BIO_new(BIO_s_mem());
901
if (!conn->ssl_out) {
902
tls_show_errors(MSG_INFO, __func__,
903
"Failed to create a new BIO for ssl_out");
905
BIO_free(conn->ssl_in);
910
SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out);
916
void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn)
920
os_free(conn->pre_shared_secret);
922
tls_engine_deinit(conn);
923
os_free(conn->subject_match);
924
os_free(conn->altsubject_match);
929
int tls_connection_established(void *ssl_ctx, struct tls_connection *conn)
931
return conn ? SSL_is_init_finished(conn->ssl) : 0;
935
int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn)
940
/* Shutdown previous TLS connection without notifying the peer
941
* because the connection was already terminated in practice
942
* and "close notify" shutdown alert would confuse AS. */
943
SSL_set_quiet_shutdown(conn->ssl, 1);
944
SSL_shutdown(conn->ssl);
949
static int tls_match_altsubject_component(X509 *cert, int type,
950
const char *value, size_t len)
956
ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
958
for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) {
959
gen = sk_GENERAL_NAME_value(ext, i);
960
if (gen->type != type)
962
if (os_strlen((char *) gen->d.ia5->data) == len &&
963
os_memcmp(value, gen->d.ia5->data, len) == 0)
971
static int tls_match_altsubject(X509 *cert, const char *match)
974
const char *pos, *end;
979
if (os_strncmp(pos, "EMAIL:", 6) == 0) {
982
} else if (os_strncmp(pos, "DNS:", 4) == 0) {
985
} else if (os_strncmp(pos, "URI:", 4) == 0) {
989
wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName "
993
end = os_strchr(pos, ';');
995
if (os_strncmp(end + 1, "EMAIL:", 6) == 0 ||
996
os_strncmp(end + 1, "DNS:", 4) == 0 ||
997
os_strncmp(end + 1, "URI:", 4) == 0)
999
end = os_strchr(end + 1, ';');
1004
len = os_strlen(pos);
1005
if (tls_match_altsubject_component(cert, type, pos, len) > 0)
1014
static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
1020
struct tls_connection *conn;
1021
char *match, *altmatch;
1023
err_cert = X509_STORE_CTX_get_current_cert(x509_ctx);
1024
err = X509_STORE_CTX_get_error(x509_ctx);
1025
depth = X509_STORE_CTX_get_error_depth(x509_ctx);
1026
ssl = X509_STORE_CTX_get_ex_data(x509_ctx,
1027
SSL_get_ex_data_X509_STORE_CTX_idx());
1028
X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf));
1030
conn = SSL_get_app_data(ssl);
1031
match = conn ? conn->subject_match : NULL;
1032
altmatch = conn ? conn->altsubject_match : NULL;
1034
if (!preverify_ok) {
1035
wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
1036
" error %d (%s) depth %d for '%s'", err,
1037
X509_verify_cert_error_string(err), depth, buf);
1039
wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
1040
"preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
1042
X509_verify_cert_error_string(err), depth, buf);
1043
if (depth == 0 && match && os_strstr(buf, match) == NULL) {
1044
wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not "
1045
"match with '%s'", buf, match);
1047
} else if (depth == 0 && altmatch &&
1048
!tls_match_altsubject(err_cert, altmatch)) {
1049
wpa_printf(MSG_WARNING, "TLS: altSubjectName match "
1050
"'%s' not found", altmatch);
1055
return preverify_ok;
1059
#ifndef OPENSSL_NO_STDIO
1060
static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert)
1062
SSL_CTX *ssl_ctx = _ssl_ctx;
1063
X509_LOOKUP *lookup;
1066
lookup = X509_STORE_add_lookup(ssl_ctx->cert_store,
1067
X509_LOOKUP_file());
1068
if (lookup == NULL) {
1069
tls_show_errors(MSG_WARNING, __func__,
1070
"Failed add lookup for X509 store");
1074
if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) {
1075
unsigned long err = ERR_peek_error();
1076
tls_show_errors(MSG_WARNING, __func__,
1077
"Failed load CA in DER format");
1078
if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1079
ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1080
wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1081
"cert already in hash table error",
1089
#endif /* OPENSSL_NO_STDIO */
1092
static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn,
1093
const char *ca_cert, const u8 *ca_cert_blob,
1094
size_t ca_cert_blob_len, const char *ca_path)
1096
SSL_CTX *ssl_ctx = _ssl_ctx;
1099
X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1102
tls_show_errors(MSG_WARNING, __func__,
1103
"Failed to parse ca_cert_blob");
1107
if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1108
unsigned long err = ERR_peek_error();
1109
tls_show_errors(MSG_WARNING, __func__,
1110
"Failed to add ca_cert_blob to "
1111
"certificate store");
1112
if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1113
ERR_GET_REASON(err) ==
1114
X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1115
wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1116
"cert already in hash table error",
1124
wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1125
"to certificate store", __func__);
1126
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1130
#ifdef CONFIG_NATIVE_WINDOWS
1131
if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1133
wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1134
"system certificate store");
1135
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1138
#endif /* CONFIG_NATIVE_WINDOWS */
1140
if (ca_cert || ca_path) {
1141
#ifndef OPENSSL_NO_STDIO
1142
if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1144
tls_show_errors(MSG_WARNING, __func__,
1145
"Failed to load root certificates");
1147
tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1148
wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1149
"DER format CA certificate",
1154
wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1155
"certificate(s) loaded");
1156
tls_get_errors(ssl_ctx);
1158
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1159
#else /* OPENSSL_NO_STDIO */
1160
wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1163
#endif /* OPENSSL_NO_STDIO */
1165
/* No ca_cert configured - do not try to verify server
1167
SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1174
static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1177
if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1179
tls_show_errors(MSG_WARNING, __func__,
1180
"Failed to load root certificates");
1184
wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1185
"certificate(s) loaded");
1187
#ifndef OPENSSL_NO_STDIO
1188
/* Add the same CAs to the client certificate requests */
1189
SSL_CTX_set_client_CA_list(ssl_ctx,
1190
SSL_load_client_CA_file(ca_cert));
1191
#endif /* OPENSSL_NO_STDIO */
1198
int tls_global_set_verify(void *ssl_ctx, int check_crl)
1203
X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1205
tls_show_errors(MSG_INFO, __func__, "Failed to get "
1206
"certificate store when enabling "
1210
flags = X509_V_FLAG_CRL_CHECK;
1212
flags |= X509_V_FLAG_CRL_CHECK_ALL;
1213
X509_STORE_set_flags(cs, flags);
1219
static int tls_connection_set_subject_match(struct tls_connection *conn,
1220
const char *subject_match,
1221
const char *altsubject_match)
1223
os_free(conn->subject_match);
1224
conn->subject_match = NULL;
1225
if (subject_match) {
1226
conn->subject_match = os_strdup(subject_match);
1227
if (conn->subject_match == NULL)
1231
os_free(conn->altsubject_match);
1232
conn->altsubject_match = NULL;
1233
if (altsubject_match) {
1234
conn->altsubject_match = os_strdup(altsubject_match);
1235
if (conn->altsubject_match == NULL)
1243
int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1250
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1251
SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1252
SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1254
SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1257
SSL_set_accept_state(conn->ssl);
1263
static int tls_connection_client_cert(struct tls_connection *conn,
1264
const char *client_cert,
1265
const u8 *client_cert_blob,
1266
size_t client_cert_blob_len)
1268
if (client_cert == NULL && client_cert_blob == NULL)
1271
if (client_cert_blob &&
1272
SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1273
client_cert_blob_len) == 1) {
1274
wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1277
} else if (client_cert_blob) {
1278
tls_show_errors(MSG_DEBUG, __func__,
1279
"SSL_use_certificate_ASN1 failed");
1282
if (client_cert == NULL)
1285
#ifndef OPENSSL_NO_STDIO
1286
if (SSL_use_certificate_file(conn->ssl, client_cert,
1287
SSL_FILETYPE_ASN1) == 1) {
1288
wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1292
tls_show_errors(MSG_DEBUG, __func__,
1293
"SSL_use_certificate_file (DER) failed");
1296
if (SSL_use_certificate_file(conn->ssl, client_cert,
1297
SSL_FILETYPE_PEM) == 1) {
1298
wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1302
tls_show_errors(MSG_DEBUG, __func__,
1303
"SSL_use_certificate_file (PEM) failed");
1305
#else /* OPENSSL_NO_STDIO */
1306
wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1307
#endif /* OPENSSL_NO_STDIO */
1313
static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1315
#ifndef OPENSSL_NO_STDIO
1316
if (client_cert == NULL)
1319
if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1320
SSL_FILETYPE_ASN1) != 1 &&
1321
SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1322
SSL_FILETYPE_PEM) != 1) {
1323
tls_show_errors(MSG_INFO, __func__,
1324
"Failed to load client certificate");
1328
#else /* OPENSSL_NO_STDIO */
1329
if (client_cert == NULL)
1331
wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1333
#endif /* OPENSSL_NO_STDIO */
1337
static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1339
if (password == NULL) {
1342
os_strncpy(buf, (char *) password, size);
1343
buf[size - 1] = '\0';
1344
return os_strlen(buf);
1349
static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1354
STACK_OF(X509) *certs;
1361
if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1362
tls_show_errors(MSG_DEBUG, __func__,
1363
"Failed to parse PKCS12 file");
1367
wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1370
X509_NAME_oneline(X509_get_subject_name(cert), buf,
1372
wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1373
"subject='%s'", buf);
1375
if (SSL_use_certificate(ssl, cert) != 1)
1378
if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1385
wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1387
if (SSL_use_PrivateKey(ssl, pkey) != 1)
1390
if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1393
EVP_PKEY_free(pkey);
1397
while ((cert = sk_X509_pop(certs)) != NULL) {
1398
X509_NAME_oneline(X509_get_subject_name(cert), buf,
1400
wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1401
" from PKCS12: subject='%s'", buf);
1403
* There is no SSL equivalent for the chain cert - so
1404
* always add it to the context...
1406
if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1411
sk_X509_free(certs);
1417
tls_get_errors(ssl_ctx);
1421
#endif /* PKCS12_FUNCS */
1424
static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1431
f = fopen(private_key, "rb");
1435
p12 = d2i_PKCS12_fp(f, NULL);
1439
tls_show_errors(MSG_INFO, __func__,
1440
"Failed to use PKCS#12 file");
1444
return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1446
#else /* PKCS12_FUNCS */
1447
wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1450
#endif /* PKCS12_FUNCS */
1454
static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1455
const u8 *blob, size_t len, const char *passwd)
1460
p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1462
tls_show_errors(MSG_INFO, __func__,
1463
"Failed to use PKCS#12 blob");
1467
return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1469
#else /* PKCS12_FUNCS */
1470
wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1473
#endif /* PKCS12_FUNCS */
1477
static int tls_connection_engine_private_key(struct tls_connection *conn)
1479
#ifndef OPENSSL_NO_ENGINE
1480
if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1481
tls_show_errors(MSG_ERROR, __func__,
1482
"ENGINE: cannot use private key for TLS");
1485
if (!SSL_check_private_key(conn->ssl)) {
1486
tls_show_errors(MSG_INFO, __func__,
1487
"Private key failed verification");
1491
#else /* OPENSSL_NO_ENGINE */
1492
wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1493
"engine support was not compiled in");
1495
#endif /* OPENSSL_NO_ENGINE */
1499
static int tls_connection_private_key(void *_ssl_ctx,
1500
struct tls_connection *conn,
1501
const char *private_key,
1502
const char *private_key_passwd,
1503
const u8 *private_key_blob,
1504
size_t private_key_blob_len)
1506
SSL_CTX *ssl_ctx = _ssl_ctx;
1510
if (private_key == NULL && private_key_blob == NULL)
1513
if (private_key_passwd) {
1514
passwd = os_strdup(private_key_passwd);
1520
SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1521
SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1524
while (private_key_blob) {
1525
if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1526
(u8 *) private_key_blob,
1527
private_key_blob_len) == 1) {
1528
wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1529
"ASN1(EVP_PKEY_RSA) --> OK");
1533
tls_show_errors(MSG_DEBUG, __func__,
1534
"SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1538
if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1539
(u8 *) private_key_blob,
1540
private_key_blob_len) == 1) {
1541
wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1542
"ASN1(EVP_PKEY_DSA) --> OK");
1546
tls_show_errors(MSG_DEBUG, __func__,
1547
"SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1551
if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1552
(u8 *) private_key_blob,
1553
private_key_blob_len) == 1) {
1554
wpa_printf(MSG_DEBUG, "OpenSSL: "
1555
"SSL_use_RSAPrivateKey_ASN1 --> OK");
1559
tls_show_errors(MSG_DEBUG, __func__,
1560
"SSL_use_RSAPrivateKey_ASN1 failed");
1563
if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1564
private_key_blob_len, passwd) == 0) {
1565
wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1574
while (!ok && private_key) {
1575
#ifndef OPENSSL_NO_STDIO
1576
if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1577
SSL_FILETYPE_ASN1) == 1) {
1578
wpa_printf(MSG_DEBUG, "OpenSSL: "
1579
"SSL_use_PrivateKey_File (DER) --> OK");
1583
tls_show_errors(MSG_DEBUG, __func__,
1584
"SSL_use_PrivateKey_File (DER) "
1588
if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1589
SSL_FILETYPE_PEM) == 1) {
1590
wpa_printf(MSG_DEBUG, "OpenSSL: "
1591
"SSL_use_PrivateKey_File (PEM) --> OK");
1595
tls_show_errors(MSG_DEBUG, __func__,
1596
"SSL_use_PrivateKey_File (PEM) "
1599
#else /* OPENSSL_NO_STDIO */
1600
wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1602
#endif /* OPENSSL_NO_STDIO */
1604
if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1606
wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1612
if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1613
wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1614
"access certificate store --> OK");
1623
wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1629
SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1632
if (!SSL_check_private_key(conn->ssl)) {
1633
tls_show_errors(MSG_INFO, __func__, "Private key failed "
1638
wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1643
static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1644
const char *private_key_passwd)
1648
if (private_key == NULL)
1651
if (private_key_passwd) {
1652
passwd = os_strdup(private_key_passwd);
1658
SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1659
SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1661
#ifndef OPENSSL_NO_STDIO
1662
SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1663
SSL_FILETYPE_ASN1) != 1 &&
1664
SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1665
SSL_FILETYPE_PEM) != 1 &&
1666
#endif /* OPENSSL_NO_STDIO */
1667
tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1668
tls_show_errors(MSG_INFO, __func__,
1669
"Failed to load private key");
1676
SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1678
if (!SSL_CTX_check_private_key(ssl_ctx)) {
1679
tls_show_errors(MSG_INFO, __func__,
1680
"Private key failed verification");
1688
static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1690
#ifdef OPENSSL_NO_DH
1691
if (dh_file == NULL)
1693
wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1694
"dh_file specified");
1696
#else /* OPENSSL_NO_DH */
1700
/* TODO: add support for dh_blob */
1701
if (dh_file == NULL)
1706
bio = BIO_new_file(dh_file, "r");
1708
wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1709
dh_file, ERR_error_string(ERR_get_error(), NULL));
1712
dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1714
#ifndef OPENSSL_NO_DSA
1715
while (dh == NULL) {
1717
wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1718
" trying to parse as DSA params", dh_file,
1719
ERR_error_string(ERR_get_error(), NULL));
1720
bio = BIO_new_file(dh_file, "r");
1723
dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1726
wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1727
"'%s': %s", dh_file,
1728
ERR_error_string(ERR_get_error(), NULL));
1732
wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1733
dh = DSA_dup_DH(dsa);
1736
wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1737
"params into DH params");
1742
#endif /* !OPENSSL_NO_DSA */
1744
wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1749
if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1750
wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1752
ERR_error_string(ERR_get_error(), NULL));
1758
#endif /* OPENSSL_NO_DH */
1762
int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
1763
struct tls_keys *keys)
1767
if (conn == NULL || keys == NULL)
1770
if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
1773
os_memset(keys, 0, sizeof(*keys));
1774
keys->master_key = ssl->session->master_key;
1775
keys->master_key_len = ssl->session->master_key_length;
1776
keys->client_random = ssl->s3->client_random;
1777
keys->client_random_len = SSL3_RANDOM_SIZE;
1778
keys->server_random = ssl->s3->server_random;
1779
keys->server_random_len = SSL3_RANDOM_SIZE;
1785
int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
1786
const char *label, int server_random_first,
1787
u8 *out, size_t out_len)
1793
u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
1794
const u8 *in_data, size_t in_len,
1795
size_t *out_len, u8 **appl_data,
1796
size_t *appl_data_len)
1805
* Give TLS handshake data from the server (if available) to OpenSSL
1809
BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1810
tls_show_errors(MSG_INFO, __func__,
1811
"Handshake failed - BIO_write");
1815
/* Initiate TLS handshake or continue the existing handshake */
1816
res = SSL_connect(conn->ssl);
1818
int err = SSL_get_error(conn->ssl, res);
1819
if (err == SSL_ERROR_WANT_READ)
1820
wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
1822
else if (err == SSL_ERROR_WANT_WRITE)
1823
wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
1826
tls_show_errors(MSG_INFO, __func__, "SSL_connect");
1831
/* Get the TLS handshake data to be sent to the server */
1832
res = BIO_ctrl_pending(conn->ssl_out);
1833
wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1834
out_data = os_malloc(res == 0 ? 1 : res);
1835
if (out_data == NULL) {
1836
wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1837
"handshake output (%d bytes)", res);
1838
if (BIO_reset(conn->ssl_out) < 0) {
1839
tls_show_errors(MSG_INFO, __func__,
1840
"BIO_reset failed");
1845
res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1847
tls_show_errors(MSG_INFO, __func__,
1848
"Handshake failed - BIO_read");
1849
if (BIO_reset(conn->ssl_out) < 0) {
1850
tls_show_errors(MSG_INFO, __func__,
1851
"BIO_reset failed");
1858
if (SSL_is_init_finished(conn->ssl) && appl_data) {
1859
*appl_data = os_malloc(in_len);
1861
res = SSL_read(conn->ssl, *appl_data, in_len);
1863
tls_show_errors(MSG_INFO, __func__,
1864
"Failed to read possible "
1865
"Application Data");
1866
os_free(*appl_data);
1869
*appl_data_len = res;
1870
wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
1871
" Data in Finish message",
1872
*appl_data, *appl_data_len);
1881
u8 * tls_connection_server_handshake(void *ssl_ctx,
1882
struct tls_connection *conn,
1883
const u8 *in_data, size_t in_len,
1891
BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1892
tls_show_errors(MSG_INFO, __func__,
1893
"Handshake failed - BIO_write");
1897
res = SSL_read(conn->ssl, buf, sizeof(buf));
1899
wpa_printf(MSG_DEBUG, "SSL: Unexpected data from SSL_read "
1903
res = BIO_ctrl_pending(conn->ssl_out);
1904
wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1905
out_data = os_malloc(res == 0 ? 1 : res);
1906
if (out_data == NULL) {
1907
wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1908
"handshake output (%d bytes)", res);
1909
if (BIO_reset(conn->ssl_out) < 0) {
1910
tls_show_errors(MSG_INFO, __func__,
1911
"BIO_reset failed");
1916
res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1918
tls_show_errors(MSG_INFO, __func__,
1919
"Handshake failed - BIO_read");
1920
if (BIO_reset(conn->ssl_out) < 0) {
1921
tls_show_errors(MSG_INFO, __func__,
1922
"BIO_reset failed");
1932
int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
1933
const u8 *in_data, size_t in_len,
1934
u8 *out_data, size_t out_len)
1941
/* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
1942
if ((res = BIO_reset(conn->ssl_in)) < 0 ||
1943
(res = BIO_reset(conn->ssl_out)) < 0) {
1944
tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1947
res = SSL_write(conn->ssl, in_data, in_len);
1949
tls_show_errors(MSG_INFO, __func__,
1950
"Encryption failed - SSL_write");
1954
/* Read encrypted data to be sent to the server */
1955
res = BIO_read(conn->ssl_out, out_data, out_len);
1957
tls_show_errors(MSG_INFO, __func__,
1958
"Encryption failed - BIO_read");
1966
int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
1967
const u8 *in_data, size_t in_len,
1968
u8 *out_data, size_t out_len)
1972
/* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
1973
res = BIO_write(conn->ssl_in, in_data, in_len);
1975
tls_show_errors(MSG_INFO, __func__,
1976
"Decryption failed - BIO_write");
1979
if (BIO_reset(conn->ssl_out) < 0) {
1980
tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1984
/* Read decrypted data for further processing */
1985
res = SSL_read(conn->ssl, out_data, out_len);
1987
tls_show_errors(MSG_INFO, __func__,
1988
"Decryption failed - SSL_read");
1996
int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
1998
return conn ? conn->ssl->hit : 0;
2002
#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2003
/* Pre-shared secred requires a patch to openssl, so this function is
2004
* commented out unless explicitly needed for EAP-FAST in order to be able to
2005
* build this file with unmodified openssl. */
2007
static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2008
STACK_OF(SSL_CIPHER) *peer_ciphers,
2009
SSL_CIPHER **cipher, void *arg)
2011
struct tls_connection *conn = arg;
2013
if (conn == NULL || conn->pre_shared_secret == 0)
2016
os_memcpy(secret, conn->pre_shared_secret,
2017
conn->pre_shared_secret_len);
2018
*secret_len = conn->pre_shared_secret_len;
2024
int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
2025
const u8 *key, size_t key_len)
2027
if (conn == NULL || key_len > SSL_MAX_MASTER_KEY_LENGTH)
2030
os_free(conn->pre_shared_secret);
2031
conn->pre_shared_secret = NULL;
2032
conn->pre_shared_secret_len = 0;
2035
conn->pre_shared_secret = os_malloc(key_len);
2036
if (conn->pre_shared_secret) {
2037
os_memcpy(conn->pre_shared_secret, key, key_len);
2038
conn->pre_shared_secret_len = key_len;
2040
if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2044
if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2050
#endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2053
int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2056
char buf[100], *pos, *end;
2060
if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2065
end = pos + sizeof(buf);
2068
while (*c != TLS_CIPHER_NONE) {
2072
case TLS_CIPHER_RC4_SHA:
2075
case TLS_CIPHER_AES128_SHA:
2076
suite = "AES128-SHA";
2078
case TLS_CIPHER_RSA_DHE_AES128_SHA:
2079
suite = "DHE-RSA-AES128-SHA";
2081
case TLS_CIPHER_ANON_DH_AES128_SHA:
2082
suite = "ADH-AES128-SHA";
2085
wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2086
"cipher selection: %d", *c);
2089
ret = os_snprintf(pos, end - pos, ":%s", suite);
2090
if (ret < 0 || ret >= end - pos)
2097
wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2099
if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2100
tls_show_errors(MSG_INFO, __func__,
2101
"Cipher suite configuration failed");
2109
int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2110
char *buf, size_t buflen)
2113
if (conn == NULL || conn->ssl == NULL)
2116
name = SSL_get_cipher(conn->ssl);
2120
os_snprintf(buf, buflen, "%s", name);
2121
buf[buflen - 1] = '\0';
2126
int tls_connection_enable_workaround(void *ssl_ctx,
2127
struct tls_connection *conn)
2129
SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2135
#if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2136
/* ClientHello TLS extensions require a patch to openssl, so this function is
2137
* commented out unless explicitly needed for EAP-FAST in order to be able to
2138
* build this file with unmodified openssl. */
2139
int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2140
int ext_type, const u8 *data,
2143
if (conn == NULL || conn->ssl == NULL)
2146
if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2152
#endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2155
int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2159
return conn->failed;
2163
int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2167
return conn->read_alerts;
2171
int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2175
return conn->write_alerts;
2179
int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2180
const struct tls_connection_params *params)
2188
while ((err = ERR_get_error())) {
2189
wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2190
__func__, ERR_error_string(err, NULL));
2193
if (tls_connection_set_subject_match(conn,
2194
params->subject_match,
2195
params->altsubject_match))
2197
if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2198
params->ca_cert_blob,
2199
params->ca_cert_blob_len,
2202
if (tls_connection_client_cert(conn, params->client_cert,
2203
params->client_cert_blob,
2204
params->client_cert_blob_len))
2207
if (params->engine) {
2208
wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2209
ret = tls_engine_init(conn, params->engine_id, params->pin,
2213
if (tls_connection_engine_private_key(conn))
2214
return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2215
} else if (tls_connection_private_key(tls_ctx, conn,
2216
params->private_key,
2217
params->private_key_passwd,
2218
params->private_key_blob,
2219
params->private_key_blob_len)) {
2220
wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2221
params->private_key);
2225
if (tls_connection_dh(conn, params->dh_file)) {
2226
wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2231
tls_get_errors(tls_ctx);
2237
int tls_global_set_params(void *tls_ctx,
2238
const struct tls_connection_params *params)
2240
SSL_CTX *ssl_ctx = tls_ctx;
2243
while ((err = ERR_get_error())) {
2244
wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2245
__func__, ERR_error_string(err, NULL));
2248
if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2251
if (tls_global_client_cert(ssl_ctx, params->client_cert))
2254
if (tls_global_private_key(ssl_ctx, params->private_key,
2255
params->private_key_passwd))
2262
int tls_connection_get_keyblock_size(void *tls_ctx,
2263
struct tls_connection *conn)
2265
const EVP_CIPHER *c;
2268
if (conn == NULL || conn->ssl == NULL ||
2269
conn->ssl->enc_read_ctx == NULL ||
2270
conn->ssl->enc_read_ctx->cipher == NULL ||
2271
conn->ssl->read_hash == NULL)
2274
c = conn->ssl->enc_read_ctx->cipher;
2275
h = conn->ssl->read_hash;
2277
return 2 * (EVP_CIPHER_key_length(c) +
2279
EVP_CIPHER_iv_length(c));
2283
unsigned int tls_capabilities(void *tls_ctx)
2289
int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2296
int tls_connection_ia_send_phase_finished(void *tls_ctx,
2297
struct tls_connection *conn,
2299
u8 *out_data, size_t out_len)
2305
int tls_connection_ia_final_phase_finished(void *tls_ctx,
2306
struct tls_connection *conn)
2312
int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2313
struct tls_connection *conn,
2314
const u8 *key, size_t key_len)