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 * Remove previously configured trusted CA certificates before adding
1102 X509_STORE_free(ssl_ctx->cert_store);
1103 ssl_ctx->cert_store = X509_STORE_new();
1104 if (ssl_ctx->cert_store == NULL) {
1105 wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new "
1106 "certificate store", __func__);
1111 X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob,
1114 tls_show_errors(MSG_WARNING, __func__,
1115 "Failed to parse ca_cert_blob");
1119 if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) {
1120 unsigned long err = ERR_peek_error();
1121 tls_show_errors(MSG_WARNING, __func__,
1122 "Failed to add ca_cert_blob to "
1123 "certificate store");
1124 if (ERR_GET_LIB(err) == ERR_LIB_X509 &&
1125 ERR_GET_REASON(err) ==
1126 X509_R_CERT_ALREADY_IN_HASH_TABLE) {
1127 wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring "
1128 "cert already in hash table error",
1136 wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob "
1137 "to certificate store", __func__);
1138 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1142 #ifdef CONFIG_NATIVE_WINDOWS
1143 if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) ==
1145 wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from "
1146 "system certificate store");
1147 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1150 #endif /* CONFIG_NATIVE_WINDOWS */
1152 if (ca_cert || ca_path) {
1153 #ifndef OPENSSL_NO_STDIO
1154 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) !=
1156 tls_show_errors(MSG_WARNING, __func__,
1157 "Failed to load root certificates");
1159 tls_load_ca_der(ssl_ctx, ca_cert) == 0) {
1160 wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded "
1161 "DER format CA certificate",
1166 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1167 "certificate(s) loaded");
1168 tls_get_errors(ssl_ctx);
1170 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
1171 #else /* OPENSSL_NO_STDIO */
1172 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1175 #endif /* OPENSSL_NO_STDIO */
1177 /* No ca_cert configured - do not try to verify server
1179 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1186 static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert)
1189 if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1)
1191 tls_show_errors(MSG_WARNING, __func__,
1192 "Failed to load root certificates");
1196 wpa_printf(MSG_DEBUG, "TLS: Trusted root "
1197 "certificate(s) loaded");
1199 #ifndef OPENSSL_NO_STDIO
1200 /* Add the same CAs to the client certificate requests */
1201 SSL_CTX_set_client_CA_list(ssl_ctx,
1202 SSL_load_client_CA_file(ca_cert));
1203 #endif /* OPENSSL_NO_STDIO */
1210 int tls_global_set_verify(void *ssl_ctx, int check_crl)
1215 X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx);
1217 tls_show_errors(MSG_INFO, __func__, "Failed to get "
1218 "certificate store when enabling "
1222 flags = X509_V_FLAG_CRL_CHECK;
1224 flags |= X509_V_FLAG_CRL_CHECK_ALL;
1225 X509_STORE_set_flags(cs, flags);
1231 static int tls_connection_set_subject_match(struct tls_connection *conn,
1232 const char *subject_match,
1233 const char *altsubject_match)
1235 os_free(conn->subject_match);
1236 conn->subject_match = NULL;
1237 if (subject_match) {
1238 conn->subject_match = os_strdup(subject_match);
1239 if (conn->subject_match == NULL)
1243 os_free(conn->altsubject_match);
1244 conn->altsubject_match = NULL;
1245 if (altsubject_match) {
1246 conn->altsubject_match = os_strdup(altsubject_match);
1247 if (conn->altsubject_match == NULL)
1255 int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn,
1262 SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
1263 SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
1264 SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
1266 SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
1269 SSL_set_accept_state(conn->ssl);
1275 static int tls_connection_client_cert(struct tls_connection *conn,
1276 const char *client_cert,
1277 const u8 *client_cert_blob,
1278 size_t client_cert_blob_len)
1280 if (client_cert == NULL && client_cert_blob == NULL)
1283 if (client_cert_blob &&
1284 SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob,
1285 client_cert_blob_len) == 1) {
1286 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> "
1289 } else if (client_cert_blob) {
1290 tls_show_errors(MSG_DEBUG, __func__,
1291 "SSL_use_certificate_ASN1 failed");
1294 if (client_cert == NULL)
1297 #ifndef OPENSSL_NO_STDIO
1298 if (SSL_use_certificate_file(conn->ssl, client_cert,
1299 SSL_FILETYPE_ASN1) == 1) {
1300 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)"
1304 tls_show_errors(MSG_DEBUG, __func__,
1305 "SSL_use_certificate_file (DER) failed");
1308 if (SSL_use_certificate_file(conn->ssl, client_cert,
1309 SSL_FILETYPE_PEM) == 1) {
1310 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
1314 tls_show_errors(MSG_DEBUG, __func__,
1315 "SSL_use_certificate_file (PEM) failed");
1317 #else /* OPENSSL_NO_STDIO */
1318 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1319 #endif /* OPENSSL_NO_STDIO */
1325 static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert)
1327 #ifndef OPENSSL_NO_STDIO
1328 if (client_cert == NULL)
1331 if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1332 SSL_FILETYPE_ASN1) != 1 &&
1333 SSL_CTX_use_certificate_file(ssl_ctx, client_cert,
1334 SSL_FILETYPE_PEM) != 1) {
1335 tls_show_errors(MSG_INFO, __func__,
1336 "Failed to load client certificate");
1340 #else /* OPENSSL_NO_STDIO */
1341 if (client_cert == NULL)
1343 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__);
1345 #endif /* OPENSSL_NO_STDIO */
1349 static int tls_passwd_cb(char *buf, int size, int rwflag, void *password)
1351 if (password == NULL) {
1354 os_strncpy(buf, (char *) password, size);
1355 buf[size - 1] = '\0';
1356 return os_strlen(buf);
1361 static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12,
1366 STACK_OF(X509) *certs;
1373 if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) {
1374 tls_show_errors(MSG_DEBUG, __func__,
1375 "Failed to parse PKCS12 file");
1379 wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data");
1382 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1384 wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: "
1385 "subject='%s'", buf);
1387 if (SSL_use_certificate(ssl, cert) != 1)
1390 if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1)
1397 wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12");
1399 if (SSL_use_PrivateKey(ssl, pkey) != 1)
1402 if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1)
1405 EVP_PKEY_free(pkey);
1409 while ((cert = sk_X509_pop(certs)) != NULL) {
1410 X509_NAME_oneline(X509_get_subject_name(cert), buf,
1412 wpa_printf(MSG_DEBUG, "TLS: additional certificate"
1413 " from PKCS12: subject='%s'", buf);
1415 * There is no SSL equivalent for the chain cert - so
1416 * always add it to the context...
1418 if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) {
1423 sk_X509_free(certs);
1429 tls_get_errors(ssl_ctx);
1433 #endif /* PKCS12_FUNCS */
1436 static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key,
1443 f = fopen(private_key, "rb");
1447 p12 = d2i_PKCS12_fp(f, NULL);
1451 tls_show_errors(MSG_INFO, __func__,
1452 "Failed to use PKCS#12 file");
1456 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1458 #else /* PKCS12_FUNCS */
1459 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read "
1462 #endif /* PKCS12_FUNCS */
1466 static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl,
1467 const u8 *blob, size_t len, const char *passwd)
1472 p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len);
1474 tls_show_errors(MSG_INFO, __func__,
1475 "Failed to use PKCS#12 blob");
1479 return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd);
1481 #else /* PKCS12_FUNCS */
1482 wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse "
1485 #endif /* PKCS12_FUNCS */
1489 static int tls_connection_engine_private_key(struct tls_connection *conn)
1491 #ifndef OPENSSL_NO_ENGINE
1492 if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) {
1493 tls_show_errors(MSG_ERROR, __func__,
1494 "ENGINE: cannot use private key for TLS");
1497 if (!SSL_check_private_key(conn->ssl)) {
1498 tls_show_errors(MSG_INFO, __func__,
1499 "Private key failed verification");
1503 #else /* OPENSSL_NO_ENGINE */
1504 wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but "
1505 "engine support was not compiled in");
1507 #endif /* OPENSSL_NO_ENGINE */
1511 static int tls_connection_private_key(void *_ssl_ctx,
1512 struct tls_connection *conn,
1513 const char *private_key,
1514 const char *private_key_passwd,
1515 const u8 *private_key_blob,
1516 size_t private_key_blob_len)
1518 SSL_CTX *ssl_ctx = _ssl_ctx;
1522 if (private_key == NULL && private_key_blob == NULL)
1525 if (private_key_passwd) {
1526 passwd = os_strdup(private_key_passwd);
1532 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1533 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1536 while (private_key_blob) {
1537 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl,
1538 (u8 *) private_key_blob,
1539 private_key_blob_len) == 1) {
1540 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1541 "ASN1(EVP_PKEY_RSA) --> OK");
1545 tls_show_errors(MSG_DEBUG, __func__,
1546 "SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
1550 if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl,
1551 (u8 *) private_key_blob,
1552 private_key_blob_len) == 1) {
1553 wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_"
1554 "ASN1(EVP_PKEY_DSA) --> OK");
1558 tls_show_errors(MSG_DEBUG, __func__,
1559 "SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
1563 if (SSL_use_RSAPrivateKey_ASN1(conn->ssl,
1564 (u8 *) private_key_blob,
1565 private_key_blob_len) == 1) {
1566 wpa_printf(MSG_DEBUG, "OpenSSL: "
1567 "SSL_use_RSAPrivateKey_ASN1 --> OK");
1571 tls_show_errors(MSG_DEBUG, __func__,
1572 "SSL_use_RSAPrivateKey_ASN1 failed");
1575 if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob,
1576 private_key_blob_len, passwd) == 0) {
1577 wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> "
1586 while (!ok && private_key) {
1587 #ifndef OPENSSL_NO_STDIO
1588 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1589 SSL_FILETYPE_ASN1) == 1) {
1590 wpa_printf(MSG_DEBUG, "OpenSSL: "
1591 "SSL_use_PrivateKey_File (DER) --> OK");
1595 tls_show_errors(MSG_DEBUG, __func__,
1596 "SSL_use_PrivateKey_File (DER) "
1600 if (SSL_use_PrivateKey_file(conn->ssl, private_key,
1601 SSL_FILETYPE_PEM) == 1) {
1602 wpa_printf(MSG_DEBUG, "OpenSSL: "
1603 "SSL_use_PrivateKey_File (PEM) --> OK");
1607 tls_show_errors(MSG_DEBUG, __func__,
1608 "SSL_use_PrivateKey_File (PEM) "
1611 #else /* OPENSSL_NO_STDIO */
1612 wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO",
1614 #endif /* OPENSSL_NO_STDIO */
1616 if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd)
1618 wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file "
1624 if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) {
1625 wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to "
1626 "access certificate store --> OK");
1635 wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
1641 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1644 if (!SSL_check_private_key(conn->ssl)) {
1645 tls_show_errors(MSG_INFO, __func__, "Private key failed "
1650 wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully");
1655 static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key,
1656 const char *private_key_passwd)
1660 if (private_key == NULL)
1663 if (private_key_passwd) {
1664 passwd = os_strdup(private_key_passwd);
1670 SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb);
1671 SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd);
1673 #ifndef OPENSSL_NO_STDIO
1674 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1675 SSL_FILETYPE_ASN1) != 1 &&
1676 SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key,
1677 SSL_FILETYPE_PEM) != 1 &&
1678 #endif /* OPENSSL_NO_STDIO */
1679 tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) {
1680 tls_show_errors(MSG_INFO, __func__,
1681 "Failed to load private key");
1688 SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL);
1690 if (!SSL_CTX_check_private_key(ssl_ctx)) {
1691 tls_show_errors(MSG_INFO, __func__,
1692 "Private key failed verification");
1700 static int tls_connection_dh(struct tls_connection *conn, const char *dh_file)
1702 #ifdef OPENSSL_NO_DH
1703 if (dh_file == NULL)
1705 wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but "
1706 "dh_file specified");
1708 #else /* OPENSSL_NO_DH */
1712 /* TODO: add support for dh_blob */
1713 if (dh_file == NULL)
1718 bio = BIO_new_file(dh_file, "r");
1720 wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s",
1721 dh_file, ERR_error_string(ERR_get_error(), NULL));
1724 dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1726 #ifndef OPENSSL_NO_DSA
1727 while (dh == NULL) {
1729 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -"
1730 " trying to parse as DSA params", dh_file,
1731 ERR_error_string(ERR_get_error(), NULL));
1732 bio = BIO_new_file(dh_file, "r");
1735 dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL);
1738 wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file "
1739 "'%s': %s", dh_file,
1740 ERR_error_string(ERR_get_error(), NULL));
1744 wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format");
1745 dh = DSA_dup_DH(dsa);
1748 wpa_printf(MSG_INFO, "TLS: Failed to convert DSA "
1749 "params into DH params");
1754 #endif /* !OPENSSL_NO_DSA */
1756 wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file "
1761 if (SSL_set_tmp_dh(conn->ssl, dh) != 1) {
1762 wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': "
1764 ERR_error_string(ERR_get_error(), NULL));
1770 #endif /* OPENSSL_NO_DH */
1774 int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn,
1775 struct tls_keys *keys)
1779 if (conn == NULL || keys == NULL)
1782 if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL)
1785 os_memset(keys, 0, sizeof(*keys));
1786 keys->master_key = ssl->session->master_key;
1787 keys->master_key_len = ssl->session->master_key_length;
1788 keys->client_random = ssl->s3->client_random;
1789 keys->client_random_len = SSL3_RANDOM_SIZE;
1790 keys->server_random = ssl->s3->server_random;
1791 keys->server_random_len = SSL3_RANDOM_SIZE;
1797 int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
1798 const char *label, int server_random_first,
1799 u8 *out, size_t out_len)
1805 u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
1806 const u8 *in_data, size_t in_len,
1807 size_t *out_len, u8 **appl_data,
1808 size_t *appl_data_len)
1817 * Give TLS handshake data from the server (if available) to OpenSSL
1821 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1822 tls_show_errors(MSG_INFO, __func__,
1823 "Handshake failed - BIO_write");
1827 /* Initiate TLS handshake or continue the existing handshake */
1828 res = SSL_connect(conn->ssl);
1830 int err = SSL_get_error(conn->ssl, res);
1831 if (err == SSL_ERROR_WANT_READ)
1832 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want "
1834 else if (err == SSL_ERROR_WANT_WRITE)
1835 wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to "
1838 tls_show_errors(MSG_INFO, __func__, "SSL_connect");
1843 /* Get the TLS handshake data to be sent to the server */
1844 res = BIO_ctrl_pending(conn->ssl_out);
1845 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1846 out_data = os_malloc(res == 0 ? 1 : res);
1847 if (out_data == NULL) {
1848 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1849 "handshake output (%d bytes)", res);
1850 if (BIO_reset(conn->ssl_out) < 0) {
1851 tls_show_errors(MSG_INFO, __func__,
1852 "BIO_reset failed");
1857 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1859 tls_show_errors(MSG_INFO, __func__,
1860 "Handshake failed - BIO_read");
1861 if (BIO_reset(conn->ssl_out) < 0) {
1862 tls_show_errors(MSG_INFO, __func__,
1863 "BIO_reset failed");
1870 if (SSL_is_init_finished(conn->ssl) && appl_data) {
1871 *appl_data = os_malloc(in_len);
1873 res = SSL_read(conn->ssl, *appl_data, in_len);
1875 tls_show_errors(MSG_INFO, __func__,
1876 "Failed to read possible "
1877 "Application Data");
1878 os_free(*appl_data);
1881 *appl_data_len = res;
1882 wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
1883 " Data in Finish message",
1884 *appl_data, *appl_data_len);
1893 u8 * tls_connection_server_handshake(void *ssl_ctx,
1894 struct tls_connection *conn,
1895 const u8 *in_data, size_t in_len,
1903 BIO_write(conn->ssl_in, in_data, in_len) < 0) {
1904 tls_show_errors(MSG_INFO, __func__,
1905 "Handshake failed - BIO_write");
1909 res = SSL_read(conn->ssl, buf, sizeof(buf));
1911 wpa_printf(MSG_DEBUG, "SSL: Unexpected data from SSL_read "
1915 res = BIO_ctrl_pending(conn->ssl_out);
1916 wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
1917 out_data = os_malloc(res == 0 ? 1 : res);
1918 if (out_data == NULL) {
1919 wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for "
1920 "handshake output (%d bytes)", res);
1921 if (BIO_reset(conn->ssl_out) < 0) {
1922 tls_show_errors(MSG_INFO, __func__,
1923 "BIO_reset failed");
1928 res = res == 0 ? 0 : BIO_read(conn->ssl_out, out_data, res);
1930 tls_show_errors(MSG_INFO, __func__,
1931 "Handshake failed - BIO_read");
1932 if (BIO_reset(conn->ssl_out) < 0) {
1933 tls_show_errors(MSG_INFO, __func__,
1934 "BIO_reset failed");
1944 int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
1945 const u8 *in_data, size_t in_len,
1946 u8 *out_data, size_t out_len)
1953 /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */
1954 if ((res = BIO_reset(conn->ssl_in)) < 0 ||
1955 (res = BIO_reset(conn->ssl_out)) < 0) {
1956 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1959 res = SSL_write(conn->ssl, in_data, in_len);
1961 tls_show_errors(MSG_INFO, __func__,
1962 "Encryption failed - SSL_write");
1966 /* Read encrypted data to be sent to the server */
1967 res = BIO_read(conn->ssl_out, out_data, out_len);
1969 tls_show_errors(MSG_INFO, __func__,
1970 "Encryption failed - BIO_read");
1978 int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
1979 const u8 *in_data, size_t in_len,
1980 u8 *out_data, size_t out_len)
1984 /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
1985 res = BIO_write(conn->ssl_in, in_data, in_len);
1987 tls_show_errors(MSG_INFO, __func__,
1988 "Decryption failed - BIO_write");
1991 if (BIO_reset(conn->ssl_out) < 0) {
1992 tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
1996 /* Read decrypted data for further processing */
1997 res = SSL_read(conn->ssl, out_data, out_len);
1999 tls_show_errors(MSG_INFO, __func__,
2000 "Decryption failed - SSL_read");
2008 int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn)
2010 return conn ? conn->ssl->hit : 0;
2014 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2015 /* Pre-shared secred requires a patch to openssl, so this function is
2016 * commented out unless explicitly needed for EAP-FAST in order to be able to
2017 * build this file with unmodified openssl. */
2019 static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len,
2020 STACK_OF(SSL_CIPHER) *peer_ciphers,
2021 SSL_CIPHER **cipher, void *arg)
2023 struct tls_connection *conn = arg;
2025 if (conn == NULL || conn->pre_shared_secret == 0)
2028 os_memcpy(secret, conn->pre_shared_secret,
2029 conn->pre_shared_secret_len);
2030 *secret_len = conn->pre_shared_secret_len;
2036 int tls_connection_set_master_key(void *ssl_ctx, struct tls_connection *conn,
2037 const u8 *key, size_t key_len)
2039 if (conn == NULL || key_len > SSL_MAX_MASTER_KEY_LENGTH)
2042 os_free(conn->pre_shared_secret);
2043 conn->pre_shared_secret = NULL;
2044 conn->pre_shared_secret_len = 0;
2047 conn->pre_shared_secret = os_malloc(key_len);
2048 if (conn->pre_shared_secret) {
2049 os_memcpy(conn->pre_shared_secret, key, key_len);
2050 conn->pre_shared_secret_len = key_len;
2052 if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb,
2056 if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1)
2062 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2065 int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
2068 char buf[100], *pos, *end;
2072 if (conn == NULL || conn->ssl == NULL || ciphers == NULL)
2077 end = pos + sizeof(buf);
2080 while (*c != TLS_CIPHER_NONE) {
2084 case TLS_CIPHER_RC4_SHA:
2087 case TLS_CIPHER_AES128_SHA:
2088 suite = "AES128-SHA";
2090 case TLS_CIPHER_RSA_DHE_AES128_SHA:
2091 suite = "DHE-RSA-AES128-SHA";
2093 case TLS_CIPHER_ANON_DH_AES128_SHA:
2094 suite = "ADH-AES128-SHA";
2097 wpa_printf(MSG_DEBUG, "TLS: Unsupported "
2098 "cipher selection: %d", *c);
2101 ret = os_snprintf(pos, end - pos, ":%s", suite);
2102 if (ret < 0 || ret >= end - pos)
2109 wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1);
2111 if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) {
2112 tls_show_errors(MSG_INFO, __func__,
2113 "Cipher suite configuration failed");
2121 int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn,
2122 char *buf, size_t buflen)
2125 if (conn == NULL || conn->ssl == NULL)
2128 name = SSL_get_cipher(conn->ssl);
2132 os_snprintf(buf, buflen, "%s", name);
2133 buf[buflen - 1] = '\0';
2138 int tls_connection_enable_workaround(void *ssl_ctx,
2139 struct tls_connection *conn)
2141 SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS);
2147 #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC)
2148 /* ClientHello TLS extensions require a patch to openssl, so this function is
2149 * commented out unless explicitly needed for EAP-FAST in order to be able to
2150 * build this file with unmodified openssl. */
2151 int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn,
2152 int ext_type, const u8 *data,
2155 if (conn == NULL || conn->ssl == NULL)
2158 if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data,
2164 #endif /* EAP_FAST || EAP_FAST_DYNAMIC */
2167 int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn)
2171 return conn->failed;
2175 int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn)
2179 return conn->read_alerts;
2183 int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn)
2187 return conn->write_alerts;
2191 int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
2192 const struct tls_connection_params *params)
2200 while ((err = ERR_get_error())) {
2201 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2202 __func__, ERR_error_string(err, NULL));
2205 if (tls_connection_set_subject_match(conn,
2206 params->subject_match,
2207 params->altsubject_match))
2209 if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert,
2210 params->ca_cert_blob,
2211 params->ca_cert_blob_len,
2214 if (tls_connection_client_cert(conn, params->client_cert,
2215 params->client_cert_blob,
2216 params->client_cert_blob_len))
2219 if (params->engine) {
2220 wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine");
2221 ret = tls_engine_init(conn, params->engine_id, params->pin,
2225 if (tls_connection_engine_private_key(conn))
2226 return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED;
2227 } else if (tls_connection_private_key(tls_ctx, conn,
2228 params->private_key,
2229 params->private_key_passwd,
2230 params->private_key_blob,
2231 params->private_key_blob_len)) {
2232 wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'",
2233 params->private_key);
2237 if (tls_connection_dh(conn, params->dh_file)) {
2238 wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'",
2243 tls_get_errors(tls_ctx);
2249 int tls_global_set_params(void *tls_ctx,
2250 const struct tls_connection_params *params)
2252 SSL_CTX *ssl_ctx = tls_ctx;
2255 while ((err = ERR_get_error())) {
2256 wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s",
2257 __func__, ERR_error_string(err, NULL));
2260 if (tls_global_ca_cert(ssl_ctx, params->ca_cert))
2263 if (tls_global_client_cert(ssl_ctx, params->client_cert))
2266 if (tls_global_private_key(ssl_ctx, params->private_key,
2267 params->private_key_passwd))
2274 int tls_connection_get_keyblock_size(void *tls_ctx,
2275 struct tls_connection *conn)
2277 const EVP_CIPHER *c;
2280 if (conn == NULL || conn->ssl == NULL ||
2281 conn->ssl->enc_read_ctx == NULL ||
2282 conn->ssl->enc_read_ctx->cipher == NULL ||
2283 conn->ssl->read_hash == NULL)
2286 c = conn->ssl->enc_read_ctx->cipher;
2287 #if OPENSSL_VERSION_NUMBER >= 0x00909000L
2288 h = EVP_MD_CTX_md(conn->ssl->read_hash);
2290 h = conn->ssl->read_hash;
2293 return 2 * (EVP_CIPHER_key_length(c) +
2295 EVP_CIPHER_iv_length(c));
2299 unsigned int tls_capabilities(void *tls_ctx)
2305 int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
2312 int tls_connection_ia_send_phase_finished(void *tls_ctx,
2313 struct tls_connection *conn,
2315 u8 *out_data, size_t out_len)
2321 int tls_connection_ia_final_phase_finished(void *tls_ctx,
2322 struct tls_connection *conn)
2328 int tls_connection_ia_permute_inner_secret(void *tls_ctx,
2329 struct tls_connection *conn,
2330 const u8 *key, size_t key_len)