| /* |
| * SSL/TLS interface functions for OpenSSL |
| * Copyright (c) 2004-2011, Jouni Malinen <j@w1.fi> |
| * |
| * This software may be distributed under the terms of the BSD license. |
| * See README for more details. |
| */ |
| |
| #include "includes.h" |
| |
| #ifndef CONFIG_SMARTCARD |
| #ifndef OPENSSL_NO_ENGINE |
| #define OPENSSL_NO_ENGINE |
| #endif |
| #endif |
| |
| #include <openssl/ssl.h> |
| #include <openssl/err.h> |
| #include <openssl/pkcs12.h> |
| #include <openssl/x509v3.h> |
| #ifndef OPENSSL_NO_ENGINE |
| #include <openssl/engine.h> |
| #endif /* OPENSSL_NO_ENGINE */ |
| |
| #ifdef ANDROID |
| #include <openssl/pem.h> |
| #include "keystore_get.h" |
| #endif /* ANDROID */ |
| |
| #include "common.h" |
| #include "crypto.h" |
| #include "tls.h" |
| |
| #if OPENSSL_VERSION_NUMBER >= 0x0090800fL |
| #define OPENSSL_d2i_TYPE const unsigned char ** |
| #else |
| #define OPENSSL_d2i_TYPE unsigned char ** |
| #endif |
| |
| #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT |
| #ifdef SSL_OP_NO_TICKET |
| /* |
| * Session ticket override patch was merged into OpenSSL 0.9.9 tree on |
| * 2008-11-15. This version uses a bit different API compared to the old patch. |
| */ |
| #define CONFIG_OPENSSL_TICKET_OVERRIDE |
| #endif |
| #endif |
| |
| static int tls_openssl_ref_count = 0; |
| |
| struct tls_global { |
| void (*event_cb)(void *ctx, enum tls_event ev, |
| union tls_event_data *data); |
| void *cb_ctx; |
| int cert_in_cb; |
| }; |
| |
| static struct tls_global *tls_global = NULL; |
| |
| |
| struct tls_connection { |
| SSL *ssl; |
| BIO *ssl_in, *ssl_out; |
| #ifndef OPENSSL_NO_ENGINE |
| ENGINE *engine; /* functional reference to the engine */ |
| EVP_PKEY *private_key; /* the private key if using engine */ |
| #endif /* OPENSSL_NO_ENGINE */ |
| char *subject_match, *altsubject_match; |
| int read_alerts, write_alerts, failed; |
| |
| tls_session_ticket_cb session_ticket_cb; |
| void *session_ticket_cb_ctx; |
| |
| /* SessionTicket received from OpenSSL hello_extension_cb (server) */ |
| u8 *session_ticket; |
| size_t session_ticket_len; |
| |
| unsigned int ca_cert_verify:1; |
| unsigned int cert_probe:1; |
| unsigned int server_cert_only:1; |
| |
| u8 srv_cert_hash[32]; |
| |
| unsigned int flags; |
| }; |
| |
| |
| #ifdef CONFIG_NO_STDOUT_DEBUG |
| |
| static void _tls_show_errors(void) |
| { |
| unsigned long err; |
| |
| while ((err = ERR_get_error())) { |
| /* Just ignore the errors, since stdout is disabled */ |
| } |
| } |
| #define tls_show_errors(l, f, t) _tls_show_errors() |
| |
| #else /* CONFIG_NO_STDOUT_DEBUG */ |
| |
| static void tls_show_errors(int level, const char *func, const char *txt) |
| { |
| unsigned long err; |
| |
| wpa_printf(level, "OpenSSL: %s - %s %s", |
| func, txt, ERR_error_string(ERR_get_error(), NULL)); |
| |
| while ((err = ERR_get_error())) { |
| wpa_printf(MSG_INFO, "OpenSSL: pending error: %s", |
| ERR_error_string(err, NULL)); |
| } |
| } |
| |
| #endif /* CONFIG_NO_STDOUT_DEBUG */ |
| |
| |
| #ifdef CONFIG_NATIVE_WINDOWS |
| |
| /* Windows CryptoAPI and access to certificate stores */ |
| #include <wincrypt.h> |
| |
| #ifdef __MINGW32_VERSION |
| /* |
| * MinGW does not yet include all the needed definitions for CryptoAPI, so |
| * define here whatever extra is needed. |
| */ |
| #define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16) |
| #define CERT_STORE_READONLY_FLAG 0x00008000 |
| #define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000 |
| |
| #endif /* __MINGW32_VERSION */ |
| |
| |
| struct cryptoapi_rsa_data { |
| const CERT_CONTEXT *cert; |
| HCRYPTPROV crypt_prov; |
| DWORD key_spec; |
| BOOL free_crypt_prov; |
| }; |
| |
| |
| static void cryptoapi_error(const char *msg) |
| { |
| wpa_printf(MSG_INFO, "CryptoAPI: %s; err=%u", |
| msg, (unsigned int) GetLastError()); |
| } |
| |
| |
| static int cryptoapi_rsa_pub_enc(int flen, const unsigned char *from, |
| unsigned char *to, RSA *rsa, int padding) |
| { |
| wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); |
| return 0; |
| } |
| |
| |
| static int cryptoapi_rsa_pub_dec(int flen, const unsigned char *from, |
| unsigned char *to, RSA *rsa, int padding) |
| { |
| wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); |
| return 0; |
| } |
| |
| |
| static int cryptoapi_rsa_priv_enc(int flen, const unsigned char *from, |
| unsigned char *to, RSA *rsa, int padding) |
| { |
| struct cryptoapi_rsa_data *priv = |
| (struct cryptoapi_rsa_data *) rsa->meth->app_data; |
| HCRYPTHASH hash; |
| DWORD hash_size, len, i; |
| unsigned char *buf = NULL; |
| int ret = 0; |
| |
| if (priv == NULL) { |
| RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, |
| ERR_R_PASSED_NULL_PARAMETER); |
| return 0; |
| } |
| |
| if (padding != RSA_PKCS1_PADDING) { |
| RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, |
| RSA_R_UNKNOWN_PADDING_TYPE); |
| return 0; |
| } |
| |
| if (flen != 16 /* MD5 */ + 20 /* SHA-1 */) { |
| wpa_printf(MSG_INFO, "%s - only MD5-SHA1 hash supported", |
| __func__); |
| RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, |
| RSA_R_INVALID_MESSAGE_LENGTH); |
| return 0; |
| } |
| |
| if (!CryptCreateHash(priv->crypt_prov, CALG_SSL3_SHAMD5, 0, 0, &hash)) |
| { |
| cryptoapi_error("CryptCreateHash failed"); |
| return 0; |
| } |
| |
| len = sizeof(hash_size); |
| if (!CryptGetHashParam(hash, HP_HASHSIZE, (BYTE *) &hash_size, &len, |
| 0)) { |
| cryptoapi_error("CryptGetHashParam failed"); |
| goto err; |
| } |
| |
| if ((int) hash_size != flen) { |
| wpa_printf(MSG_INFO, "CryptoAPI: Invalid hash size (%u != %d)", |
| (unsigned) hash_size, flen); |
| RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, |
| RSA_R_INVALID_MESSAGE_LENGTH); |
| goto err; |
| } |
| if (!CryptSetHashParam(hash, HP_HASHVAL, (BYTE * ) from, 0)) { |
| cryptoapi_error("CryptSetHashParam failed"); |
| goto err; |
| } |
| |
| len = RSA_size(rsa); |
| buf = os_malloc(len); |
| if (buf == NULL) { |
| RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| if (!CryptSignHash(hash, priv->key_spec, NULL, 0, buf, &len)) { |
| cryptoapi_error("CryptSignHash failed"); |
| goto err; |
| } |
| |
| for (i = 0; i < len; i++) |
| to[i] = buf[len - i - 1]; |
| ret = len; |
| |
| err: |
| os_free(buf); |
| CryptDestroyHash(hash); |
| |
| return ret; |
| } |
| |
| |
| static int cryptoapi_rsa_priv_dec(int flen, const unsigned char *from, |
| unsigned char *to, RSA *rsa, int padding) |
| { |
| wpa_printf(MSG_DEBUG, "%s - not implemented", __func__); |
| return 0; |
| } |
| |
| |
| static void cryptoapi_free_data(struct cryptoapi_rsa_data *priv) |
| { |
| if (priv == NULL) |
| return; |
| if (priv->crypt_prov && priv->free_crypt_prov) |
| CryptReleaseContext(priv->crypt_prov, 0); |
| if (priv->cert) |
| CertFreeCertificateContext(priv->cert); |
| os_free(priv); |
| } |
| |
| |
| static int cryptoapi_finish(RSA *rsa) |
| { |
| cryptoapi_free_data((struct cryptoapi_rsa_data *) rsa->meth->app_data); |
| os_free((void *) rsa->meth); |
| rsa->meth = NULL; |
| return 1; |
| } |
| |
| |
| static const CERT_CONTEXT * cryptoapi_find_cert(const char *name, DWORD store) |
| { |
| HCERTSTORE cs; |
| const CERT_CONTEXT *ret = NULL; |
| |
| cs = CertOpenStore((LPCSTR) CERT_STORE_PROV_SYSTEM, 0, 0, |
| store | CERT_STORE_OPEN_EXISTING_FLAG | |
| CERT_STORE_READONLY_FLAG, L"MY"); |
| if (cs == NULL) { |
| cryptoapi_error("Failed to open 'My system store'"); |
| return NULL; |
| } |
| |
| if (strncmp(name, "cert://", 7) == 0) { |
| unsigned short wbuf[255]; |
| MultiByteToWideChar(CP_ACP, 0, name + 7, -1, wbuf, 255); |
| ret = CertFindCertificateInStore(cs, X509_ASN_ENCODING | |
| PKCS_7_ASN_ENCODING, |
| 0, CERT_FIND_SUBJECT_STR, |
| wbuf, NULL); |
| } else if (strncmp(name, "hash://", 7) == 0) { |
| CRYPT_HASH_BLOB blob; |
| int len; |
| const char *hash = name + 7; |
| unsigned char *buf; |
| |
| len = os_strlen(hash) / 2; |
| buf = os_malloc(len); |
| if (buf && hexstr2bin(hash, buf, len) == 0) { |
| blob.cbData = len; |
| blob.pbData = buf; |
| ret = CertFindCertificateInStore(cs, |
| X509_ASN_ENCODING | |
| PKCS_7_ASN_ENCODING, |
| 0, CERT_FIND_HASH, |
| &blob, NULL); |
| } |
| os_free(buf); |
| } |
| |
| CertCloseStore(cs, 0); |
| |
| return ret; |
| } |
| |
| |
| static int tls_cryptoapi_cert(SSL *ssl, const char *name) |
| { |
| X509 *cert = NULL; |
| RSA *rsa = NULL, *pub_rsa; |
| struct cryptoapi_rsa_data *priv; |
| RSA_METHOD *rsa_meth; |
| |
| if (name == NULL || |
| (strncmp(name, "cert://", 7) != 0 && |
| strncmp(name, "hash://", 7) != 0)) |
| return -1; |
| |
| priv = os_zalloc(sizeof(*priv)); |
| rsa_meth = os_zalloc(sizeof(*rsa_meth)); |
| if (priv == NULL || rsa_meth == NULL) { |
| wpa_printf(MSG_WARNING, "CryptoAPI: Failed to allocate memory " |
| "for CryptoAPI RSA method"); |
| os_free(priv); |
| os_free(rsa_meth); |
| return -1; |
| } |
| |
| priv->cert = cryptoapi_find_cert(name, CERT_SYSTEM_STORE_CURRENT_USER); |
| if (priv->cert == NULL) { |
| priv->cert = cryptoapi_find_cert( |
| name, CERT_SYSTEM_STORE_LOCAL_MACHINE); |
| } |
| if (priv->cert == NULL) { |
| wpa_printf(MSG_INFO, "CryptoAPI: Could not find certificate " |
| "'%s'", name); |
| goto err; |
| } |
| |
| cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &priv->cert->pbCertEncoded, |
| priv->cert->cbCertEncoded); |
| if (cert == NULL) { |
| wpa_printf(MSG_INFO, "CryptoAPI: Could not process X509 DER " |
| "encoding"); |
| goto err; |
| } |
| |
| if (!CryptAcquireCertificatePrivateKey(priv->cert, |
| CRYPT_ACQUIRE_COMPARE_KEY_FLAG, |
| NULL, &priv->crypt_prov, |
| &priv->key_spec, |
| &priv->free_crypt_prov)) { |
| cryptoapi_error("Failed to acquire a private key for the " |
| "certificate"); |
| goto err; |
| } |
| |
| rsa_meth->name = "Microsoft CryptoAPI RSA Method"; |
| rsa_meth->rsa_pub_enc = cryptoapi_rsa_pub_enc; |
| rsa_meth->rsa_pub_dec = cryptoapi_rsa_pub_dec; |
| rsa_meth->rsa_priv_enc = cryptoapi_rsa_priv_enc; |
| rsa_meth->rsa_priv_dec = cryptoapi_rsa_priv_dec; |
| rsa_meth->finish = cryptoapi_finish; |
| rsa_meth->flags = RSA_METHOD_FLAG_NO_CHECK; |
| rsa_meth->app_data = (char *) priv; |
| |
| rsa = RSA_new(); |
| if (rsa == NULL) { |
| SSLerr(SSL_F_SSL_CTX_USE_CERTIFICATE_FILE, |
| ERR_R_MALLOC_FAILURE); |
| goto err; |
| } |
| |
| if (!SSL_use_certificate(ssl, cert)) { |
| RSA_free(rsa); |
| rsa = NULL; |
| goto err; |
| } |
| pub_rsa = cert->cert_info->key->pkey->pkey.rsa; |
| X509_free(cert); |
| cert = NULL; |
| |
| rsa->n = BN_dup(pub_rsa->n); |
| rsa->e = BN_dup(pub_rsa->e); |
| if (!RSA_set_method(rsa, rsa_meth)) |
| goto err; |
| |
| if (!SSL_use_RSAPrivateKey(ssl, rsa)) |
| goto err; |
| RSA_free(rsa); |
| |
| return 0; |
| |
| err: |
| if (cert) |
| X509_free(cert); |
| if (rsa) |
| RSA_free(rsa); |
| else { |
| os_free(rsa_meth); |
| cryptoapi_free_data(priv); |
| } |
| return -1; |
| } |
| |
| |
| static int tls_cryptoapi_ca_cert(SSL_CTX *ssl_ctx, SSL *ssl, const char *name) |
| { |
| HCERTSTORE cs; |
| PCCERT_CONTEXT ctx = NULL; |
| X509 *cert; |
| char buf[128]; |
| const char *store; |
| #ifdef UNICODE |
| WCHAR *wstore; |
| #endif /* UNICODE */ |
| |
| if (name == NULL || strncmp(name, "cert_store://", 13) != 0) |
| return -1; |
| |
| store = name + 13; |
| #ifdef UNICODE |
| wstore = os_malloc((os_strlen(store) + 1) * sizeof(WCHAR)); |
| if (wstore == NULL) |
| return -1; |
| wsprintf(wstore, L"%S", store); |
| cs = CertOpenSystemStore(0, wstore); |
| os_free(wstore); |
| #else /* UNICODE */ |
| cs = CertOpenSystemStore(0, store); |
| #endif /* UNICODE */ |
| if (cs == NULL) { |
| wpa_printf(MSG_DEBUG, "%s: failed to open system cert store " |
| "'%s': error=%d", __func__, store, |
| (int) GetLastError()); |
| return -1; |
| } |
| |
| while ((ctx = CertEnumCertificatesInStore(cs, ctx))) { |
| cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ctx->pbCertEncoded, |
| ctx->cbCertEncoded); |
| if (cert == NULL) { |
| wpa_printf(MSG_INFO, "CryptoAPI: Could not process " |
| "X509 DER encoding for CA cert"); |
| continue; |
| } |
| |
| X509_NAME_oneline(X509_get_subject_name(cert), buf, |
| sizeof(buf)); |
| wpa_printf(MSG_DEBUG, "OpenSSL: Loaded CA certificate for " |
| "system certificate store: subject='%s'", buf); |
| |
| if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed to add ca_cert to OpenSSL " |
| "certificate store"); |
| } |
| |
| X509_free(cert); |
| } |
| |
| if (!CertCloseStore(cs, 0)) { |
| wpa_printf(MSG_DEBUG, "%s: failed to close system cert store " |
| "'%s': error=%d", __func__, name + 13, |
| (int) GetLastError()); |
| } |
| |
| return 0; |
| } |
| |
| |
| #else /* CONFIG_NATIVE_WINDOWS */ |
| |
| static int tls_cryptoapi_cert(SSL *ssl, const char *name) |
| { |
| return -1; |
| } |
| |
| #endif /* CONFIG_NATIVE_WINDOWS */ |
| |
| |
| static void ssl_info_cb(const SSL *ssl, int where, int ret) |
| { |
| const char *str; |
| int w; |
| |
| wpa_printf(MSG_DEBUG, "SSL: (where=0x%x ret=0x%x)", where, ret); |
| w = where & ~SSL_ST_MASK; |
| if (w & SSL_ST_CONNECT) |
| str = "SSL_connect"; |
| else if (w & SSL_ST_ACCEPT) |
| str = "SSL_accept"; |
| else |
| str = "undefined"; |
| |
| if (where & SSL_CB_LOOP) { |
| wpa_printf(MSG_DEBUG, "SSL: %s:%s", |
| str, SSL_state_string_long(ssl)); |
| } else if (where & SSL_CB_ALERT) { |
| wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", |
| where & SSL_CB_READ ? |
| "read (remote end reported an error)" : |
| "write (local SSL3 detected an error)", |
| SSL_alert_type_string_long(ret), |
| SSL_alert_desc_string_long(ret)); |
| if ((ret >> 8) == SSL3_AL_FATAL) { |
| struct tls_connection *conn = |
| SSL_get_app_data((SSL *) ssl); |
| if (where & SSL_CB_READ) |
| conn->read_alerts++; |
| else |
| conn->write_alerts++; |
| } |
| if (tls_global->event_cb != NULL) { |
| union tls_event_data ev; |
| os_memset(&ev, 0, sizeof(ev)); |
| ev.alert.is_local = !(where & SSL_CB_READ); |
| ev.alert.type = SSL_alert_type_string_long(ret); |
| ev.alert.description = SSL_alert_desc_string_long(ret); |
| tls_global->event_cb(tls_global->cb_ctx, TLS_ALERT, |
| &ev); |
| } |
| } else if (where & SSL_CB_EXIT && ret <= 0) { |
| wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", |
| str, ret == 0 ? "failed" : "error", |
| SSL_state_string_long(ssl)); |
| } |
| } |
| |
| |
| #ifndef OPENSSL_NO_ENGINE |
| /** |
| * tls_engine_load_dynamic_generic - load any openssl engine |
| * @pre: an array of commands and values that load an engine initialized |
| * in the engine specific function |
| * @post: an array of commands and values that initialize an already loaded |
| * engine (or %NULL if not required) |
| * @id: the engine id of the engine to load (only required if post is not %NULL |
| * |
| * This function is a generic function that loads any openssl engine. |
| * |
| * Returns: 0 on success, -1 on failure |
| */ |
| static int tls_engine_load_dynamic_generic(const char *pre[], |
| const char *post[], const char *id) |
| { |
| ENGINE *engine; |
| const char *dynamic_id = "dynamic"; |
| |
| engine = ENGINE_by_id(id); |
| if (engine) { |
| ENGINE_free(engine); |
| wpa_printf(MSG_DEBUG, "ENGINE: engine '%s' is already " |
| "available", id); |
| return 0; |
| } |
| ERR_clear_error(); |
| |
| engine = ENGINE_by_id(dynamic_id); |
| if (engine == NULL) { |
| wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", |
| dynamic_id, |
| ERR_error_string(ERR_get_error(), NULL)); |
| return -1; |
| } |
| |
| /* Perform the pre commands. This will load the engine. */ |
| while (pre && pre[0]) { |
| wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", pre[0], pre[1]); |
| if (ENGINE_ctrl_cmd_string(engine, pre[0], pre[1], 0) == 0) { |
| wpa_printf(MSG_INFO, "ENGINE: ctrl cmd_string failed: " |
| "%s %s [%s]", pre[0], pre[1], |
| ERR_error_string(ERR_get_error(), NULL)); |
| ENGINE_free(engine); |
| return -1; |
| } |
| pre += 2; |
| } |
| |
| /* |
| * Free the reference to the "dynamic" engine. The loaded engine can |
| * now be looked up using ENGINE_by_id(). |
| */ |
| ENGINE_free(engine); |
| |
| engine = ENGINE_by_id(id); |
| if (engine == NULL) { |
| wpa_printf(MSG_INFO, "ENGINE: Can't find engine %s [%s]", |
| id, ERR_error_string(ERR_get_error(), NULL)); |
| return -1; |
| } |
| |
| while (post && post[0]) { |
| wpa_printf(MSG_DEBUG, "ENGINE: '%s' '%s'", post[0], post[1]); |
| if (ENGINE_ctrl_cmd_string(engine, post[0], post[1], 0) == 0) { |
| wpa_printf(MSG_DEBUG, "ENGINE: ctrl cmd_string failed:" |
| " %s %s [%s]", post[0], post[1], |
| ERR_error_string(ERR_get_error(), NULL)); |
| ENGINE_remove(engine); |
| ENGINE_free(engine); |
| return -1; |
| } |
| post += 2; |
| } |
| ENGINE_free(engine); |
| |
| return 0; |
| } |
| |
| |
| /** |
| * tls_engine_load_dynamic_pkcs11 - load the pkcs11 engine provided by opensc |
| * @pkcs11_so_path: pksc11_so_path from the configuration |
| * @pcks11_module_path: pkcs11_module_path from the configuration |
| */ |
| static int tls_engine_load_dynamic_pkcs11(const char *pkcs11_so_path, |
| const char *pkcs11_module_path) |
| { |
| char *engine_id = "pkcs11"; |
| const char *pre_cmd[] = { |
| "SO_PATH", NULL /* pkcs11_so_path */, |
| "ID", NULL /* engine_id */, |
| "LIST_ADD", "1", |
| /* "NO_VCHECK", "1", */ |
| "LOAD", NULL, |
| NULL, NULL |
| }; |
| const char *post_cmd[] = { |
| "MODULE_PATH", NULL /* pkcs11_module_path */, |
| NULL, NULL |
| }; |
| |
| if (!pkcs11_so_path || !pkcs11_module_path) |
| return 0; |
| |
| pre_cmd[1] = pkcs11_so_path; |
| pre_cmd[3] = engine_id; |
| post_cmd[1] = pkcs11_module_path; |
| |
| wpa_printf(MSG_DEBUG, "ENGINE: Loading pkcs11 Engine from %s", |
| pkcs11_so_path); |
| |
| return tls_engine_load_dynamic_generic(pre_cmd, post_cmd, engine_id); |
| } |
| |
| |
| /** |
| * tls_engine_load_dynamic_opensc - load the opensc engine provided by opensc |
| * @opensc_so_path: opensc_so_path from the configuration |
| */ |
| static int tls_engine_load_dynamic_opensc(const char *opensc_so_path) |
| { |
| char *engine_id = "opensc"; |
| const char *pre_cmd[] = { |
| "SO_PATH", NULL /* opensc_so_path */, |
| "ID", NULL /* engine_id */, |
| "LIST_ADD", "1", |
| "LOAD", NULL, |
| NULL, NULL |
| }; |
| |
| if (!opensc_so_path) |
| return 0; |
| |
| pre_cmd[1] = opensc_so_path; |
| pre_cmd[3] = engine_id; |
| |
| wpa_printf(MSG_DEBUG, "ENGINE: Loading OpenSC Engine from %s", |
| opensc_so_path); |
| |
| return tls_engine_load_dynamic_generic(pre_cmd, NULL, engine_id); |
| } |
| #endif /* OPENSSL_NO_ENGINE */ |
| |
| |
| void * tls_init(const struct tls_config *conf) |
| { |
| SSL_CTX *ssl; |
| |
| if (tls_openssl_ref_count == 0) { |
| tls_global = os_zalloc(sizeof(*tls_global)); |
| if (tls_global == NULL) |
| return NULL; |
| if (conf) { |
| tls_global->event_cb = conf->event_cb; |
| tls_global->cb_ctx = conf->cb_ctx; |
| tls_global->cert_in_cb = conf->cert_in_cb; |
| } |
| |
| #ifdef CONFIG_FIPS |
| #ifdef OPENSSL_FIPS |
| if (conf && conf->fips_mode) { |
| if (!FIPS_mode_set(1)) { |
| wpa_printf(MSG_ERROR, "Failed to enable FIPS " |
| "mode"); |
| ERR_load_crypto_strings(); |
| ERR_print_errors_fp(stderr); |
| os_free(tls_global); |
| tls_global = NULL; |
| return NULL; |
| } else |
| wpa_printf(MSG_INFO, "Running in FIPS mode"); |
| } |
| #else /* OPENSSL_FIPS */ |
| if (conf && conf->fips_mode) { |
| wpa_printf(MSG_ERROR, "FIPS mode requested, but not " |
| "supported"); |
| os_free(tls_global); |
| tls_global = NULL; |
| return NULL; |
| } |
| #endif /* OPENSSL_FIPS */ |
| #endif /* CONFIG_FIPS */ |
| SSL_load_error_strings(); |
| SSL_library_init(); |
| #if (OPENSSL_VERSION_NUMBER >= 0x0090800fL) && !defined(OPENSSL_NO_SHA256) |
| EVP_add_digest(EVP_sha256()); |
| #endif /* OPENSSL_NO_SHA256 */ |
| /* TODO: if /dev/urandom is available, PRNG is seeded |
| * automatically. If this is not the case, random data should |
| * be added here. */ |
| |
| #ifdef PKCS12_FUNCS |
| #ifndef OPENSSL_NO_RC2 |
| /* |
| * 40-bit RC2 is commonly used in PKCS#12 files, so enable it. |
| * This is enabled by PKCS12_PBE_add() in OpenSSL 0.9.8 |
| * versions, but it looks like OpenSSL 1.0.0 does not do that |
| * anymore. |
| */ |
| EVP_add_cipher(EVP_rc2_40_cbc()); |
| #endif /* OPENSSL_NO_RC2 */ |
| PKCS12_PBE_add(); |
| #endif /* PKCS12_FUNCS */ |
| } |
| tls_openssl_ref_count++; |
| |
| ssl = SSL_CTX_new(TLSv1_method()); |
| if (ssl == NULL) |
| return NULL; |
| |
| SSL_CTX_set_info_callback(ssl, ssl_info_cb); |
| |
| #ifndef OPENSSL_NO_ENGINE |
| if (conf && |
| (conf->opensc_engine_path || conf->pkcs11_engine_path || |
| conf->pkcs11_module_path)) { |
| wpa_printf(MSG_DEBUG, "ENGINE: Loading dynamic engine"); |
| ERR_load_ENGINE_strings(); |
| ENGINE_load_dynamic(); |
| |
| if (tls_engine_load_dynamic_opensc(conf->opensc_engine_path) || |
| tls_engine_load_dynamic_pkcs11(conf->pkcs11_engine_path, |
| conf->pkcs11_module_path)) { |
| tls_deinit(ssl); |
| return NULL; |
| } |
| } |
| #endif /* OPENSSL_NO_ENGINE */ |
| |
| return ssl; |
| } |
| |
| |
| void tls_deinit(void *ssl_ctx) |
| { |
| SSL_CTX *ssl = ssl_ctx; |
| SSL_CTX_free(ssl); |
| |
| tls_openssl_ref_count--; |
| if (tls_openssl_ref_count == 0) { |
| #ifndef OPENSSL_NO_ENGINE |
| ENGINE_cleanup(); |
| #endif /* OPENSSL_NO_ENGINE */ |
| CRYPTO_cleanup_all_ex_data(); |
| ERR_remove_state(0); |
| ERR_free_strings(); |
| EVP_cleanup(); |
| os_free(tls_global); |
| tls_global = NULL; |
| } |
| } |
| |
| |
| static int tls_engine_init(struct tls_connection *conn, const char *engine_id, |
| const char *pin, const char *key_id, |
| const char *cert_id, const char *ca_cert_id) |
| { |
| #ifndef OPENSSL_NO_ENGINE |
| int ret = -1; |
| if (engine_id == NULL) { |
| wpa_printf(MSG_ERROR, "ENGINE: Engine ID not set"); |
| return -1; |
| } |
| if (pin == NULL) { |
| wpa_printf(MSG_ERROR, "ENGINE: Smartcard PIN not set"); |
| return -1; |
| } |
| if (key_id == NULL) { |
| wpa_printf(MSG_ERROR, "ENGINE: Key Id not set"); |
| return -1; |
| } |
| |
| ERR_clear_error(); |
| conn->engine = ENGINE_by_id(engine_id); |
| if (!conn->engine) { |
| wpa_printf(MSG_ERROR, "ENGINE: engine %s not available [%s]", |
| engine_id, ERR_error_string(ERR_get_error(), NULL)); |
| goto err; |
| } |
| if (ENGINE_init(conn->engine) != 1) { |
| wpa_printf(MSG_ERROR, "ENGINE: engine init failed " |
| "(engine: %s) [%s]", engine_id, |
| ERR_error_string(ERR_get_error(), NULL)); |
| goto err; |
| } |
| wpa_printf(MSG_DEBUG, "ENGINE: engine initialized"); |
| |
| if (ENGINE_ctrl_cmd_string(conn->engine, "PIN", pin, 0) == 0) { |
| wpa_printf(MSG_ERROR, "ENGINE: cannot set pin [%s]", |
| ERR_error_string(ERR_get_error(), NULL)); |
| goto err; |
| } |
| /* load private key first in-case PIN is required for cert */ |
| conn->private_key = ENGINE_load_private_key(conn->engine, |
| key_id, NULL, NULL); |
| if (!conn->private_key) { |
| wpa_printf(MSG_ERROR, "ENGINE: cannot load private key with id" |
| " '%s' [%s]", key_id, |
| ERR_error_string(ERR_get_error(), NULL)); |
| ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; |
| goto err; |
| } |
| |
| /* handle a certificate and/or CA certificate */ |
| if (cert_id || ca_cert_id) { |
| const char *cmd_name = "LOAD_CERT_CTRL"; |
| |
| /* test if the engine supports a LOAD_CERT_CTRL */ |
| if (!ENGINE_ctrl(conn->engine, ENGINE_CTRL_GET_CMD_FROM_NAME, |
| 0, (void *)cmd_name, NULL)) { |
| wpa_printf(MSG_ERROR, "ENGINE: engine does not support" |
| " loading certificates"); |
| ret = TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; |
| goto err; |
| } |
| } |
| |
| return 0; |
| |
| err: |
| if (conn->engine) { |
| ENGINE_free(conn->engine); |
| conn->engine = NULL; |
| } |
| |
| if (conn->private_key) { |
| EVP_PKEY_free(conn->private_key); |
| conn->private_key = NULL; |
| } |
| |
| return ret; |
| #else /* OPENSSL_NO_ENGINE */ |
| return 0; |
| #endif /* OPENSSL_NO_ENGINE */ |
| } |
| |
| |
| static void tls_engine_deinit(struct tls_connection *conn) |
| { |
| #ifndef OPENSSL_NO_ENGINE |
| wpa_printf(MSG_DEBUG, "ENGINE: engine deinit"); |
| if (conn->private_key) { |
| EVP_PKEY_free(conn->private_key); |
| conn->private_key = NULL; |
| } |
| if (conn->engine) { |
| ENGINE_finish(conn->engine); |
| conn->engine = NULL; |
| } |
| #endif /* OPENSSL_NO_ENGINE */ |
| } |
| |
| |
| int tls_get_errors(void *ssl_ctx) |
| { |
| int count = 0; |
| unsigned long err; |
| |
| while ((err = ERR_get_error())) { |
| wpa_printf(MSG_INFO, "TLS - SSL error: %s", |
| ERR_error_string(err, NULL)); |
| count++; |
| } |
| |
| return count; |
| } |
| |
| struct tls_connection * tls_connection_init(void *ssl_ctx) |
| { |
| SSL_CTX *ssl = ssl_ctx; |
| struct tls_connection *conn; |
| long options; |
| |
| conn = os_zalloc(sizeof(*conn)); |
| if (conn == NULL) |
| return NULL; |
| conn->ssl = SSL_new(ssl); |
| if (conn->ssl == NULL) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to initialize new SSL connection"); |
| os_free(conn); |
| return NULL; |
| } |
| |
| SSL_set_app_data(conn->ssl, conn); |
| options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | |
| SSL_OP_SINGLE_DH_USE; |
| #ifdef SSL_OP_NO_COMPRESSION |
| options |= SSL_OP_NO_COMPRESSION; |
| #endif /* SSL_OP_NO_COMPRESSION */ |
| SSL_set_options(conn->ssl, options); |
| |
| conn->ssl_in = BIO_new(BIO_s_mem()); |
| if (!conn->ssl_in) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to create a new BIO for ssl_in"); |
| SSL_free(conn->ssl); |
| os_free(conn); |
| return NULL; |
| } |
| |
| conn->ssl_out = BIO_new(BIO_s_mem()); |
| if (!conn->ssl_out) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to create a new BIO for ssl_out"); |
| SSL_free(conn->ssl); |
| BIO_free(conn->ssl_in); |
| os_free(conn); |
| return NULL; |
| } |
| |
| SSL_set_bio(conn->ssl, conn->ssl_in, conn->ssl_out); |
| |
| return conn; |
| } |
| |
| |
| void tls_connection_deinit(void *ssl_ctx, struct tls_connection *conn) |
| { |
| if (conn == NULL) |
| return; |
| SSL_free(conn->ssl); |
| tls_engine_deinit(conn); |
| os_free(conn->subject_match); |
| os_free(conn->altsubject_match); |
| os_free(conn->session_ticket); |
| os_free(conn); |
| } |
| |
| |
| int tls_connection_established(void *ssl_ctx, struct tls_connection *conn) |
| { |
| return conn ? SSL_is_init_finished(conn->ssl) : 0; |
| } |
| |
| |
| int tls_connection_shutdown(void *ssl_ctx, struct tls_connection *conn) |
| { |
| if (conn == NULL) |
| return -1; |
| |
| /* Shutdown previous TLS connection without notifying the peer |
| * because the connection was already terminated in practice |
| * and "close notify" shutdown alert would confuse AS. */ |
| SSL_set_quiet_shutdown(conn->ssl, 1); |
| SSL_shutdown(conn->ssl); |
| return 0; |
| } |
| |
| |
| static int tls_match_altsubject_component(X509 *cert, int type, |
| const char *value, size_t len) |
| { |
| GENERAL_NAME *gen; |
| void *ext; |
| int i, found = 0; |
| |
| ext = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL); |
| |
| for (i = 0; ext && i < sk_GENERAL_NAME_num(ext); i++) { |
| gen = sk_GENERAL_NAME_value(ext, i); |
| if (gen->type != type) |
| continue; |
| if (os_strlen((char *) gen->d.ia5->data) == len && |
| os_memcmp(value, gen->d.ia5->data, len) == 0) |
| found++; |
| } |
| |
| return found; |
| } |
| |
| |
| static int tls_match_altsubject(X509 *cert, const char *match) |
| { |
| int type; |
| const char *pos, *end; |
| size_t len; |
| |
| pos = match; |
| do { |
| if (os_strncmp(pos, "EMAIL:", 6) == 0) { |
| type = GEN_EMAIL; |
| pos += 6; |
| } else if (os_strncmp(pos, "DNS:", 4) == 0) { |
| type = GEN_DNS; |
| pos += 4; |
| } else if (os_strncmp(pos, "URI:", 4) == 0) { |
| type = GEN_URI; |
| pos += 4; |
| } else { |
| wpa_printf(MSG_INFO, "TLS: Invalid altSubjectName " |
| "match '%s'", pos); |
| return 0; |
| } |
| end = os_strchr(pos, ';'); |
| while (end) { |
| if (os_strncmp(end + 1, "EMAIL:", 6) == 0 || |
| os_strncmp(end + 1, "DNS:", 4) == 0 || |
| os_strncmp(end + 1, "URI:", 4) == 0) |
| break; |
| end = os_strchr(end + 1, ';'); |
| } |
| if (end) |
| len = end - pos; |
| else |
| len = os_strlen(pos); |
| if (tls_match_altsubject_component(cert, type, pos, len) > 0) |
| return 1; |
| pos = end + 1; |
| } while (end); |
| |
| return 0; |
| } |
| |
| |
| static enum tls_fail_reason openssl_tls_fail_reason(int err) |
| { |
| switch (err) { |
| case X509_V_ERR_CERT_REVOKED: |
| return TLS_FAIL_REVOKED; |
| case X509_V_ERR_CERT_NOT_YET_VALID: |
| case X509_V_ERR_CRL_NOT_YET_VALID: |
| return TLS_FAIL_NOT_YET_VALID; |
| case X509_V_ERR_CERT_HAS_EXPIRED: |
| case X509_V_ERR_CRL_HAS_EXPIRED: |
| return TLS_FAIL_EXPIRED; |
| case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: |
| case X509_V_ERR_UNABLE_TO_GET_CRL: |
| case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: |
| case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: |
| case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: |
| case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: |
| case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: |
| case X509_V_ERR_CERT_CHAIN_TOO_LONG: |
| case X509_V_ERR_PATH_LENGTH_EXCEEDED: |
| case X509_V_ERR_INVALID_CA: |
| return TLS_FAIL_UNTRUSTED; |
| case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: |
| case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: |
| case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: |
| case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: |
| case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: |
| case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: |
| case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: |
| case X509_V_ERR_CERT_UNTRUSTED: |
| case X509_V_ERR_CERT_REJECTED: |
| return TLS_FAIL_BAD_CERTIFICATE; |
| default: |
| return TLS_FAIL_UNSPECIFIED; |
| } |
| } |
| |
| |
| static struct wpabuf * get_x509_cert(X509 *cert) |
| { |
| struct wpabuf *buf; |
| u8 *tmp; |
| |
| int cert_len = i2d_X509(cert, NULL); |
| if (cert_len <= 0) |
| return NULL; |
| |
| buf = wpabuf_alloc(cert_len); |
| if (buf == NULL) |
| return NULL; |
| |
| tmp = wpabuf_put(buf, cert_len); |
| i2d_X509(cert, &tmp); |
| return buf; |
| } |
| |
| |
| static void openssl_tls_fail_event(struct tls_connection *conn, |
| X509 *err_cert, int err, int depth, |
| const char *subject, const char *err_str, |
| enum tls_fail_reason reason) |
| { |
| union tls_event_data ev; |
| struct wpabuf *cert = NULL; |
| |
| if (tls_global->event_cb == NULL) |
| return; |
| |
| cert = get_x509_cert(err_cert); |
| os_memset(&ev, 0, sizeof(ev)); |
| ev.cert_fail.reason = reason != TLS_FAIL_UNSPECIFIED ? |
| reason : openssl_tls_fail_reason(err); |
| ev.cert_fail.depth = depth; |
| ev.cert_fail.subject = subject; |
| ev.cert_fail.reason_txt = err_str; |
| ev.cert_fail.cert = cert; |
| tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); |
| wpabuf_free(cert); |
| } |
| |
| |
| static void openssl_tls_cert_event(struct tls_connection *conn, |
| X509 *err_cert, int depth, |
| const char *subject) |
| { |
| struct wpabuf *cert = NULL; |
| union tls_event_data ev; |
| #ifdef CONFIG_SHA256 |
| u8 hash[32]; |
| #endif /* CONFIG_SHA256 */ |
| |
| if (tls_global->event_cb == NULL) |
| return; |
| |
| os_memset(&ev, 0, sizeof(ev)); |
| if (conn->cert_probe || tls_global->cert_in_cb) { |
| cert = get_x509_cert(err_cert); |
| ev.peer_cert.cert = cert; |
| } |
| #ifdef CONFIG_SHA256 |
| if (cert) { |
| const u8 *addr[1]; |
| size_t len[1]; |
| addr[0] = wpabuf_head(cert); |
| len[0] = wpabuf_len(cert); |
| if (sha256_vector(1, addr, len, hash) == 0) { |
| ev.peer_cert.hash = hash; |
| ev.peer_cert.hash_len = sizeof(hash); |
| } |
| } |
| #endif /* CONFIG_SHA256 */ |
| ev.peer_cert.depth = depth; |
| ev.peer_cert.subject = subject; |
| tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev); |
| wpabuf_free(cert); |
| } |
| |
| |
| static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx) |
| { |
| char buf[256]; |
| X509 *err_cert; |
| int err, depth; |
| SSL *ssl; |
| struct tls_connection *conn; |
| char *match, *altmatch; |
| const char *err_str; |
| |
| err_cert = X509_STORE_CTX_get_current_cert(x509_ctx); |
| err = X509_STORE_CTX_get_error(x509_ctx); |
| depth = X509_STORE_CTX_get_error_depth(x509_ctx); |
| ssl = X509_STORE_CTX_get_ex_data(x509_ctx, |
| SSL_get_ex_data_X509_STORE_CTX_idx()); |
| X509_NAME_oneline(X509_get_subject_name(err_cert), buf, sizeof(buf)); |
| |
| conn = SSL_get_app_data(ssl); |
| if (conn == NULL) |
| return 0; |
| match = conn->subject_match; |
| altmatch = conn->altsubject_match; |
| |
| if (!preverify_ok && !conn->ca_cert_verify) |
| preverify_ok = 1; |
| if (!preverify_ok && depth > 0 && conn->server_cert_only) |
| preverify_ok = 1; |
| if (!preverify_ok && (conn->flags & TLS_CONN_DISABLE_TIME_CHECKS) && |
| (err == X509_V_ERR_CERT_HAS_EXPIRED || |
| err == X509_V_ERR_CERT_NOT_YET_VALID)) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Ignore certificate validity " |
| "time mismatch"); |
| preverify_ok = 1; |
| } |
| |
| err_str = X509_verify_cert_error_string(err); |
| |
| #ifdef CONFIG_SHA256 |
| if (preverify_ok && depth == 0 && conn->server_cert_only) { |
| struct wpabuf *cert; |
| cert = get_x509_cert(err_cert); |
| if (!cert) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Could not fetch " |
| "server certificate data"); |
| preverify_ok = 0; |
| } else { |
| u8 hash[32]; |
| const u8 *addr[1]; |
| size_t len[1]; |
| addr[0] = wpabuf_head(cert); |
| len[0] = wpabuf_len(cert); |
| if (sha256_vector(1, addr, len, hash) < 0 || |
| os_memcmp(conn->srv_cert_hash, hash, 32) != 0) { |
| err_str = "Server certificate mismatch"; |
| err = X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN; |
| preverify_ok = 0; |
| } |
| wpabuf_free(cert); |
| } |
| } |
| #endif /* CONFIG_SHA256 */ |
| |
| if (!preverify_ok) { |
| wpa_printf(MSG_WARNING, "TLS: Certificate verification failed," |
| " error %d (%s) depth %d for '%s'", err, err_str, |
| depth, buf); |
| openssl_tls_fail_event(conn, err_cert, err, depth, buf, |
| err_str, TLS_FAIL_UNSPECIFIED); |
| return preverify_ok; |
| } |
| |
| wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - preverify_ok=%d " |
| "err=%d (%s) ca_cert_verify=%d depth=%d buf='%s'", |
| preverify_ok, err, err_str, |
| conn->ca_cert_verify, depth, buf); |
| if (depth == 0 && match && os_strstr(buf, match) == NULL) { |
| wpa_printf(MSG_WARNING, "TLS: Subject '%s' did not " |
| "match with '%s'", buf, match); |
| preverify_ok = 0; |
| openssl_tls_fail_event(conn, err_cert, err, depth, buf, |
| "Subject mismatch", |
| TLS_FAIL_SUBJECT_MISMATCH); |
| } else if (depth == 0 && altmatch && |
| !tls_match_altsubject(err_cert, altmatch)) { |
| wpa_printf(MSG_WARNING, "TLS: altSubjectName match " |
| "'%s' not found", altmatch); |
| preverify_ok = 0; |
| openssl_tls_fail_event(conn, err_cert, err, depth, buf, |
| "AltSubject mismatch", |
| TLS_FAIL_ALTSUBJECT_MISMATCH); |
| } else |
| openssl_tls_cert_event(conn, err_cert, depth, buf); |
| |
| if (conn->cert_probe && preverify_ok && depth == 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Reject server certificate " |
| "on probe-only run"); |
| preverify_ok = 0; |
| openssl_tls_fail_event(conn, err_cert, err, depth, buf, |
| "Server certificate chain probe", |
| TLS_FAIL_SERVER_CHAIN_PROBE); |
| } |
| |
| if (preverify_ok && tls_global->event_cb != NULL) |
| tls_global->event_cb(tls_global->cb_ctx, |
| TLS_CERT_CHAIN_SUCCESS, NULL); |
| |
| return preverify_ok; |
| } |
| |
| |
| #ifndef OPENSSL_NO_STDIO |
| static int tls_load_ca_der(void *_ssl_ctx, const char *ca_cert) |
| { |
| SSL_CTX *ssl_ctx = _ssl_ctx; |
| X509_LOOKUP *lookup; |
| int ret = 0; |
| |
| lookup = X509_STORE_add_lookup(ssl_ctx->cert_store, |
| X509_LOOKUP_file()); |
| if (lookup == NULL) { |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed add lookup for X509 store"); |
| return -1; |
| } |
| |
| if (!X509_LOOKUP_load_file(lookup, ca_cert, X509_FILETYPE_ASN1)) { |
| unsigned long err = ERR_peek_error(); |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed load CA in DER format"); |
| if (ERR_GET_LIB(err) == ERR_LIB_X509 && |
| ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " |
| "cert already in hash table error", |
| __func__); |
| } else |
| ret = -1; |
| } |
| |
| return ret; |
| } |
| #endif /* OPENSSL_NO_STDIO */ |
| |
| |
| #ifdef ANDROID |
| static BIO * BIO_from_keystore(const char *key) |
| { |
| BIO *bio = NULL; |
| char value[KEYSTORE_MESSAGE_SIZE]; |
| int length = keystore_get(key, strlen(key), value); |
| if (length != -1 && (bio = BIO_new(BIO_s_mem())) != NULL) |
| BIO_write(bio, value, length); |
| return bio; |
| } |
| #endif /* ANDROID */ |
| |
| |
| static int tls_connection_ca_cert(void *_ssl_ctx, struct tls_connection *conn, |
| const char *ca_cert, const u8 *ca_cert_blob, |
| size_t ca_cert_blob_len, const char *ca_path) |
| { |
| SSL_CTX *ssl_ctx = _ssl_ctx; |
| |
| /* |
| * Remove previously configured trusted CA certificates before adding |
| * new ones. |
| */ |
| X509_STORE_free(ssl_ctx->cert_store); |
| ssl_ctx->cert_store = X509_STORE_new(); |
| if (ssl_ctx->cert_store == NULL) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " |
| "certificate store", __func__); |
| return -1; |
| } |
| |
| SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); |
| conn->ca_cert_verify = 1; |
| |
| if (ca_cert && os_strncmp(ca_cert, "probe://", 8) == 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Probe for server certificate " |
| "chain"); |
| conn->cert_probe = 1; |
| conn->ca_cert_verify = 0; |
| return 0; |
| } |
| |
| if (ca_cert && os_strncmp(ca_cert, "hash://", 7) == 0) { |
| #ifdef CONFIG_SHA256 |
| const char *pos = ca_cert + 7; |
| if (os_strncmp(pos, "server/sha256/", 14) != 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Unsupported ca_cert " |
| "hash value '%s'", ca_cert); |
| return -1; |
| } |
| pos += 14; |
| if (os_strlen(pos) != 32 * 2) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Unexpected SHA256 " |
| "hash length in ca_cert '%s'", ca_cert); |
| return -1; |
| } |
| if (hexstr2bin(pos, conn->srv_cert_hash, 32) < 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Invalid SHA256 hash " |
| "value in ca_cert '%s'", ca_cert); |
| return -1; |
| } |
| conn->server_cert_only = 1; |
| wpa_printf(MSG_DEBUG, "OpenSSL: Checking only server " |
| "certificate match"); |
| return 0; |
| #else /* CONFIG_SHA256 */ |
| wpa_printf(MSG_INFO, "No SHA256 included in the build - " |
| "cannot validate server certificate hash"); |
| return -1; |
| #endif /* CONFIG_SHA256 */ |
| } |
| |
| if (ca_cert_blob) { |
| X509 *cert = d2i_X509(NULL, (OPENSSL_d2i_TYPE) &ca_cert_blob, |
| ca_cert_blob_len); |
| if (cert == NULL) { |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed to parse ca_cert_blob"); |
| return -1; |
| } |
| |
| if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { |
| unsigned long err = ERR_peek_error(); |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed to add ca_cert_blob to " |
| "certificate store"); |
| if (ERR_GET_LIB(err) == ERR_LIB_X509 && |
| ERR_GET_REASON(err) == |
| X509_R_CERT_ALREADY_IN_HASH_TABLE) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring " |
| "cert already in hash table error", |
| __func__); |
| } else { |
| X509_free(cert); |
| return -1; |
| } |
| } |
| X509_free(cert); |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - added ca_cert_blob " |
| "to certificate store", __func__); |
| return 0; |
| } |
| |
| #ifdef ANDROID |
| if (ca_cert && os_strncmp("keystore://", ca_cert, 11) == 0) { |
| BIO *bio = BIO_from_keystore(&ca_cert[11]); |
| STACK_OF(X509_INFO) *stack = NULL; |
| int i; |
| |
| if (bio) { |
| stack = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| } |
| if (!stack) |
| return -1; |
| |
| for (i = 0; i < sk_X509_INFO_num(stack); ++i) { |
| X509_INFO *info = sk_X509_INFO_value(stack, i); |
| if (info->x509) { |
| X509_STORE_add_cert(ssl_ctx->cert_store, |
| info->x509); |
| } |
| if (info->crl) { |
| X509_STORE_add_crl(ssl_ctx->cert_store, |
| info->crl); |
| } |
| } |
| sk_X509_INFO_pop_free(stack, X509_INFO_free); |
| SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); |
| return 0; |
| } |
| #endif /* ANDROID */ |
| |
| #ifdef CONFIG_NATIVE_WINDOWS |
| if (ca_cert && tls_cryptoapi_ca_cert(ssl_ctx, conn->ssl, ca_cert) == |
| 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Added CA certificates from " |
| "system certificate store"); |
| return 0; |
| } |
| #endif /* CONFIG_NATIVE_WINDOWS */ |
| |
| if (ca_cert || ca_path) { |
| #ifndef OPENSSL_NO_STDIO |
| if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, ca_path) != |
| 1) { |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed to load root certificates"); |
| if (ca_cert && |
| tls_load_ca_der(ssl_ctx, ca_cert) == 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - loaded " |
| "DER format CA certificate", |
| __func__); |
| } else |
| return -1; |
| } else { |
| wpa_printf(MSG_DEBUG, "TLS: Trusted root " |
| "certificate(s) loaded"); |
| tls_get_errors(ssl_ctx); |
| } |
| #else /* OPENSSL_NO_STDIO */ |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", |
| __func__); |
| return -1; |
| #endif /* OPENSSL_NO_STDIO */ |
| } else { |
| /* No ca_cert configured - do not try to verify server |
| * certificate */ |
| conn->ca_cert_verify = 0; |
| } |
| |
| return 0; |
| } |
| |
| |
| static int tls_global_ca_cert(SSL_CTX *ssl_ctx, const char *ca_cert) |
| { |
| if (ca_cert) { |
| if (SSL_CTX_load_verify_locations(ssl_ctx, ca_cert, NULL) != 1) |
| { |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed to load root certificates"); |
| return -1; |
| } |
| |
| wpa_printf(MSG_DEBUG, "TLS: Trusted root " |
| "certificate(s) loaded"); |
| |
| #ifndef OPENSSL_NO_STDIO |
| /* Add the same CAs to the client certificate requests */ |
| SSL_CTX_set_client_CA_list(ssl_ctx, |
| SSL_load_client_CA_file(ca_cert)); |
| #endif /* OPENSSL_NO_STDIO */ |
| } |
| |
| return 0; |
| } |
| |
| |
| int tls_global_set_verify(void *ssl_ctx, int check_crl) |
| { |
| int flags; |
| |
| if (check_crl) { |
| X509_STORE *cs = SSL_CTX_get_cert_store(ssl_ctx); |
| if (cs == NULL) { |
| tls_show_errors(MSG_INFO, __func__, "Failed to get " |
| "certificate store when enabling " |
| "check_crl"); |
| return -1; |
| } |
| flags = X509_V_FLAG_CRL_CHECK; |
| if (check_crl == 2) |
| flags |= X509_V_FLAG_CRL_CHECK_ALL; |
| X509_STORE_set_flags(cs, flags); |
| } |
| return 0; |
| } |
| |
| |
| static int tls_connection_set_subject_match(struct tls_connection *conn, |
| const char *subject_match, |
| const char *altsubject_match) |
| { |
| os_free(conn->subject_match); |
| conn->subject_match = NULL; |
| if (subject_match) { |
| conn->subject_match = os_strdup(subject_match); |
| if (conn->subject_match == NULL) |
| return -1; |
| } |
| |
| os_free(conn->altsubject_match); |
| conn->altsubject_match = NULL; |
| if (altsubject_match) { |
| conn->altsubject_match = os_strdup(altsubject_match); |
| if (conn->altsubject_match == NULL) |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| |
| int tls_connection_set_verify(void *ssl_ctx, struct tls_connection *conn, |
| int verify_peer) |
| { |
| static int counter = 0; |
| |
| if (conn == NULL) |
| return -1; |
| |
| if (verify_peer) { |
| conn->ca_cert_verify = 1; |
| SSL_set_verify(conn->ssl, SSL_VERIFY_PEER | |
| SSL_VERIFY_FAIL_IF_NO_PEER_CERT | |
| SSL_VERIFY_CLIENT_ONCE, tls_verify_cb); |
| } else { |
| conn->ca_cert_verify = 0; |
| SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL); |
| } |
| |
| SSL_set_accept_state(conn->ssl); |
| |
| /* |
| * Set session id context in order to avoid fatal errors when client |
| * tries to resume a session. However, set the context to a unique |
| * value in order to effectively disable session resumption for now |
| * since not all areas of the server code are ready for it (e.g., |
| * EAP-TTLS needs special handling for Phase 2 after abbreviated TLS |
| * handshake). |
| */ |
| counter++; |
| SSL_set_session_id_context(conn->ssl, |
| (const unsigned char *) &counter, |
| sizeof(counter)); |
| |
| return 0; |
| } |
| |
| |
| static int tls_connection_client_cert(struct tls_connection *conn, |
| const char *client_cert, |
| const u8 *client_cert_blob, |
| size_t client_cert_blob_len) |
| { |
| if (client_cert == NULL && client_cert_blob == NULL) |
| return 0; |
| |
| if (client_cert_blob && |
| SSL_use_certificate_ASN1(conn->ssl, (u8 *) client_cert_blob, |
| client_cert_blob_len) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_ASN1 --> " |
| "OK"); |
| return 0; |
| } else if (client_cert_blob) { |
| tls_show_errors(MSG_DEBUG, __func__, |
| "SSL_use_certificate_ASN1 failed"); |
| } |
| |
| if (client_cert == NULL) |
| return -1; |
| |
| #ifdef ANDROID |
| if (os_strncmp("keystore://", client_cert, 11) == 0) { |
| BIO *bio = BIO_from_keystore(&client_cert[11]); |
| X509 *x509 = NULL; |
| int ret = -1; |
| if (bio) { |
| x509 = PEM_read_bio_X509(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| } |
| if (x509) { |
| if (SSL_use_certificate(conn->ssl, x509) == 1) |
| ret = 0; |
| X509_free(x509); |
| } |
| return ret; |
| } |
| #endif /* ANDROID */ |
| |
| #ifndef OPENSSL_NO_STDIO |
| if (SSL_use_certificate_file(conn->ssl, client_cert, |
| SSL_FILETYPE_ASN1) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (DER)" |
| " --> OK"); |
| return 0; |
| } |
| |
| if (SSL_use_certificate_file(conn->ssl, client_cert, |
| SSL_FILETYPE_PEM) == 1) { |
| ERR_clear_error(); |
| wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)" |
| " --> OK"); |
| return 0; |
| } |
| |
| tls_show_errors(MSG_DEBUG, __func__, |
| "SSL_use_certificate_file failed"); |
| #else /* OPENSSL_NO_STDIO */ |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); |
| #endif /* OPENSSL_NO_STDIO */ |
| |
| return -1; |
| } |
| |
| |
| static int tls_global_client_cert(SSL_CTX *ssl_ctx, const char *client_cert) |
| { |
| #ifndef OPENSSL_NO_STDIO |
| if (client_cert == NULL) |
| return 0; |
| |
| if (SSL_CTX_use_certificate_file(ssl_ctx, client_cert, |
| SSL_FILETYPE_ASN1) != 1 && |
| SSL_CTX_use_certificate_chain_file(ssl_ctx, client_cert) != 1 && |
| SSL_CTX_use_certificate_file(ssl_ctx, client_cert, |
| SSL_FILETYPE_PEM) != 1) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to load client certificate"); |
| return -1; |
| } |
| return 0; |
| #else /* OPENSSL_NO_STDIO */ |
| if (client_cert == NULL) |
| return 0; |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", __func__); |
| return -1; |
| #endif /* OPENSSL_NO_STDIO */ |
| } |
| |
| |
| static int tls_passwd_cb(char *buf, int size, int rwflag, void *password) |
| { |
| if (password == NULL) { |
| return 0; |
| } |
| os_strlcpy(buf, (char *) password, size); |
| return os_strlen(buf); |
| } |
| |
| |
| #ifdef PKCS12_FUNCS |
| static int tls_parse_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, PKCS12 *p12, |
| const char *passwd) |
| { |
| EVP_PKEY *pkey; |
| X509 *cert; |
| STACK_OF(X509) *certs; |
| int res = 0; |
| char buf[256]; |
| |
| pkey = NULL; |
| cert = NULL; |
| certs = NULL; |
| if (!PKCS12_parse(p12, passwd, &pkey, &cert, &certs)) { |
| tls_show_errors(MSG_DEBUG, __func__, |
| "Failed to parse PKCS12 file"); |
| PKCS12_free(p12); |
| return -1; |
| } |
| wpa_printf(MSG_DEBUG, "TLS: Successfully parsed PKCS12 data"); |
| |
| if (cert) { |
| X509_NAME_oneline(X509_get_subject_name(cert), buf, |
| sizeof(buf)); |
| wpa_printf(MSG_DEBUG, "TLS: Got certificate from PKCS12: " |
| "subject='%s'", buf); |
| if (ssl) { |
| if (SSL_use_certificate(ssl, cert) != 1) |
| res = -1; |
| } else { |
| if (SSL_CTX_use_certificate(ssl_ctx, cert) != 1) |
| res = -1; |
| } |
| X509_free(cert); |
| } |
| |
| if (pkey) { |
| wpa_printf(MSG_DEBUG, "TLS: Got private key from PKCS12"); |
| if (ssl) { |
| if (SSL_use_PrivateKey(ssl, pkey) != 1) |
| res = -1; |
| } else { |
| if (SSL_CTX_use_PrivateKey(ssl_ctx, pkey) != 1) |
| res = -1; |
| } |
| EVP_PKEY_free(pkey); |
| } |
| |
| if (certs) { |
| while ((cert = sk_X509_pop(certs)) != NULL) { |
| X509_NAME_oneline(X509_get_subject_name(cert), buf, |
| sizeof(buf)); |
| wpa_printf(MSG_DEBUG, "TLS: additional certificate" |
| " from PKCS12: subject='%s'", buf); |
| /* |
| * There is no SSL equivalent for the chain cert - so |
| * always add it to the context... |
| */ |
| if (SSL_CTX_add_extra_chain_cert(ssl_ctx, cert) != 1) { |
| res = -1; |
| break; |
| } |
| } |
| sk_X509_free(certs); |
| } |
| |
| PKCS12_free(p12); |
| |
| if (res < 0) |
| tls_get_errors(ssl_ctx); |
| |
| return res; |
| } |
| #endif /* PKCS12_FUNCS */ |
| |
| |
| static int tls_read_pkcs12(SSL_CTX *ssl_ctx, SSL *ssl, const char *private_key, |
| const char *passwd) |
| { |
| #ifdef PKCS12_FUNCS |
| FILE *f; |
| PKCS12 *p12; |
| |
| f = fopen(private_key, "rb"); |
| if (f == NULL) |
| return -1; |
| |
| p12 = d2i_PKCS12_fp(f, NULL); |
| fclose(f); |
| |
| if (p12 == NULL) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to use PKCS#12 file"); |
| return -1; |
| } |
| |
| return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); |
| |
| #else /* PKCS12_FUNCS */ |
| wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot read " |
| "p12/pfx files"); |
| return -1; |
| #endif /* PKCS12_FUNCS */ |
| } |
| |
| |
| static int tls_read_pkcs12_blob(SSL_CTX *ssl_ctx, SSL *ssl, |
| const u8 *blob, size_t len, const char *passwd) |
| { |
| #ifdef PKCS12_FUNCS |
| PKCS12 *p12; |
| |
| p12 = d2i_PKCS12(NULL, (OPENSSL_d2i_TYPE) &blob, len); |
| if (p12 == NULL) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to use PKCS#12 blob"); |
| return -1; |
| } |
| |
| return tls_parse_pkcs12(ssl_ctx, ssl, p12, passwd); |
| |
| #else /* PKCS12_FUNCS */ |
| wpa_printf(MSG_INFO, "TLS: PKCS12 support disabled - cannot parse " |
| "p12/pfx blobs"); |
| return -1; |
| #endif /* PKCS12_FUNCS */ |
| } |
| |
| |
| #ifndef OPENSSL_NO_ENGINE |
| static int tls_engine_get_cert(struct tls_connection *conn, |
| const char *cert_id, |
| X509 **cert) |
| { |
| /* this runs after the private key is loaded so no PIN is required */ |
| struct { |
| const char *cert_id; |
| X509 *cert; |
| } params; |
| params.cert_id = cert_id; |
| params.cert = NULL; |
| |
| if (!ENGINE_ctrl_cmd(conn->engine, "LOAD_CERT_CTRL", |
| 0, ¶ms, NULL, 1)) { |
| wpa_printf(MSG_ERROR, "ENGINE: cannot load client cert with id" |
| " '%s' [%s]", cert_id, |
| ERR_error_string(ERR_get_error(), NULL)); |
| return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; |
| } |
| if (!params.cert) { |
| wpa_printf(MSG_ERROR, "ENGINE: did not properly cert with id" |
| " '%s'", cert_id); |
| return TLS_SET_PARAMS_ENGINE_PRV_INIT_FAILED; |
| } |
| *cert = params.cert; |
| return 0; |
| } |
| #endif /* OPENSSL_NO_ENGINE */ |
| |
| |
| static int tls_connection_engine_client_cert(struct tls_connection *conn, |
| const char *cert_id) |
| { |
| #ifndef OPENSSL_NO_ENGINE |
| X509 *cert; |
| |
| if (tls_engine_get_cert(conn, cert_id, &cert)) |
| return -1; |
| |
| if (!SSL_use_certificate(conn->ssl, cert)) { |
| tls_show_errors(MSG_ERROR, __func__, |
| "SSL_use_certificate failed"); |
| X509_free(cert); |
| return -1; |
| } |
| X509_free(cert); |
| wpa_printf(MSG_DEBUG, "ENGINE: SSL_use_certificate --> " |
| "OK"); |
| return 0; |
| |
| #else /* OPENSSL_NO_ENGINE */ |
| return -1; |
| #endif /* OPENSSL_NO_ENGINE */ |
| } |
| |
| |
| static int tls_connection_engine_ca_cert(void *_ssl_ctx, |
| struct tls_connection *conn, |
| const char *ca_cert_id) |
| { |
| #ifndef OPENSSL_NO_ENGINE |
| X509 *cert; |
| SSL_CTX *ssl_ctx = _ssl_ctx; |
| |
| if (tls_engine_get_cert(conn, ca_cert_id, &cert)) |
| return -1; |
| |
| /* start off the same as tls_connection_ca_cert */ |
| X509_STORE_free(ssl_ctx->cert_store); |
| ssl_ctx->cert_store = X509_STORE_new(); |
| if (ssl_ctx->cert_store == NULL) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - failed to allocate new " |
| "certificate store", __func__); |
| X509_free(cert); |
| return -1; |
| } |
| if (!X509_STORE_add_cert(ssl_ctx->cert_store, cert)) { |
| unsigned long err = ERR_peek_error(); |
| tls_show_errors(MSG_WARNING, __func__, |
| "Failed to add CA certificate from engine " |
| "to certificate store"); |
| if (ERR_GET_LIB(err) == ERR_LIB_X509 && |
| ERR_GET_REASON(err) == X509_R_CERT_ALREADY_IN_HASH_TABLE) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - ignoring cert" |
| " already in hash table error", |
| __func__); |
| } else { |
| X509_free(cert); |
| return -1; |
| } |
| } |
| X509_free(cert); |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - added CA certificate from engine " |
| "to certificate store", __func__); |
| SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb); |
| conn->ca_cert_verify = 1; |
| |
| return 0; |
| |
| #else /* OPENSSL_NO_ENGINE */ |
| return -1; |
| #endif /* OPENSSL_NO_ENGINE */ |
| } |
| |
| |
| static int tls_connection_engine_private_key(struct tls_connection *conn) |
| { |
| #ifndef OPENSSL_NO_ENGINE |
| if (SSL_use_PrivateKey(conn->ssl, conn->private_key) != 1) { |
| tls_show_errors(MSG_ERROR, __func__, |
| "ENGINE: cannot use private key for TLS"); |
| return -1; |
| } |
| if (!SSL_check_private_key(conn->ssl)) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Private key failed verification"); |
| return -1; |
| } |
| return 0; |
| #else /* OPENSSL_NO_ENGINE */ |
| wpa_printf(MSG_ERROR, "SSL: Configuration uses engine, but " |
| "engine support was not compiled in"); |
| return -1; |
| #endif /* OPENSSL_NO_ENGINE */ |
| } |
| |
| |
| static int tls_connection_private_key(void *_ssl_ctx, |
| struct tls_connection *conn, |
| const char *private_key, |
| const char *private_key_passwd, |
| const u8 *private_key_blob, |
| size_t private_key_blob_len) |
| { |
| SSL_CTX *ssl_ctx = _ssl_ctx; |
| char *passwd; |
| int ok; |
| |
| if (private_key == NULL && private_key_blob == NULL) |
| return 0; |
| |
| if (private_key_passwd) { |
| passwd = os_strdup(private_key_passwd); |
| if (passwd == NULL) |
| return -1; |
| } else |
| passwd = NULL; |
| |
| SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); |
| SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); |
| |
| ok = 0; |
| while (private_key_blob) { |
| if (SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA, conn->ssl, |
| (u8 *) private_key_blob, |
| private_key_blob_len) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" |
| "ASN1(EVP_PKEY_RSA) --> OK"); |
| ok = 1; |
| break; |
| } |
| |
| if (SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA, conn->ssl, |
| (u8 *) private_key_blob, |
| private_key_blob_len) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_PrivateKey_" |
| "ASN1(EVP_PKEY_DSA) --> OK"); |
| ok = 1; |
| break; |
| } |
| |
| if (SSL_use_RSAPrivateKey_ASN1(conn->ssl, |
| (u8 *) private_key_blob, |
| private_key_blob_len) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: " |
| "SSL_use_RSAPrivateKey_ASN1 --> OK"); |
| ok = 1; |
| break; |
| } |
| |
| if (tls_read_pkcs12_blob(ssl_ctx, conn->ssl, private_key_blob, |
| private_key_blob_len, passwd) == 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: PKCS#12 as blob --> " |
| "OK"); |
| ok = 1; |
| break; |
| } |
| |
| break; |
| } |
| |
| #ifdef ANDROID |
| if (!ok && private_key && |
| os_strncmp("keystore://", private_key, 11) == 0) { |
| BIO *bio = BIO_from_keystore(&private_key[11]); |
| EVP_PKEY *pkey = NULL; |
| if (bio) { |
| pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| } |
| if (pkey) { |
| if (SSL_use_PrivateKey(conn->ssl, pkey) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Private key " |
| "from keystore"); |
| ok = 1; |
| } |
| EVP_PKEY_free(pkey); |
| } |
| } |
| #endif /* ANDROID */ |
| |
| while (!ok && private_key) { |
| #ifndef OPENSSL_NO_STDIO |
| if (SSL_use_PrivateKey_file(conn->ssl, private_key, |
| SSL_FILETYPE_ASN1) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: " |
| "SSL_use_PrivateKey_File (DER) --> OK"); |
| ok = 1; |
| break; |
| } |
| |
| if (SSL_use_PrivateKey_file(conn->ssl, private_key, |
| SSL_FILETYPE_PEM) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: " |
| "SSL_use_PrivateKey_File (PEM) --> OK"); |
| ok = 1; |
| break; |
| } |
| #else /* OPENSSL_NO_STDIO */ |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s - OPENSSL_NO_STDIO", |
| __func__); |
| #endif /* OPENSSL_NO_STDIO */ |
| |
| if (tls_read_pkcs12(ssl_ctx, conn->ssl, private_key, passwd) |
| == 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Reading PKCS#12 file " |
| "--> OK"); |
| ok = 1; |
| break; |
| } |
| |
| if (tls_cryptoapi_cert(conn->ssl, private_key) == 0) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Using CryptoAPI to " |
| "access certificate store --> OK"); |
| ok = 1; |
| break; |
| } |
| |
| break; |
| } |
| |
| if (!ok) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to load private key"); |
| os_free(passwd); |
| return -1; |
| } |
| ERR_clear_error(); |
| SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); |
| os_free(passwd); |
| |
| if (!SSL_check_private_key(conn->ssl)) { |
| tls_show_errors(MSG_INFO, __func__, "Private key failed " |
| "verification"); |
| return -1; |
| } |
| |
| wpa_printf(MSG_DEBUG, "SSL: Private key loaded successfully"); |
| return 0; |
| } |
| |
| |
| static int tls_global_private_key(SSL_CTX *ssl_ctx, const char *private_key, |
| const char *private_key_passwd) |
| { |
| char *passwd; |
| |
| if (private_key == NULL) |
| return 0; |
| |
| if (private_key_passwd) { |
| passwd = os_strdup(private_key_passwd); |
| if (passwd == NULL) |
| return -1; |
| } else |
| passwd = NULL; |
| |
| SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_passwd_cb); |
| SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, passwd); |
| if ( |
| #ifndef OPENSSL_NO_STDIO |
| SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, |
| SSL_FILETYPE_ASN1) != 1 && |
| SSL_CTX_use_PrivateKey_file(ssl_ctx, private_key, |
| SSL_FILETYPE_PEM) != 1 && |
| #endif /* OPENSSL_NO_STDIO */ |
| tls_read_pkcs12(ssl_ctx, NULL, private_key, passwd)) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to load private key"); |
| os_free(passwd); |
| ERR_clear_error(); |
| return -1; |
| } |
| os_free(passwd); |
| ERR_clear_error(); |
| SSL_CTX_set_default_passwd_cb(ssl_ctx, NULL); |
| |
| if (!SSL_CTX_check_private_key(ssl_ctx)) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Private key failed verification"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| |
| static int tls_connection_dh(struct tls_connection *conn, const char *dh_file) |
| { |
| #ifdef OPENSSL_NO_DH |
| if (dh_file == NULL) |
| return 0; |
| wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " |
| "dh_file specified"); |
| return -1; |
| #else /* OPENSSL_NO_DH */ |
| DH *dh; |
| BIO *bio; |
| |
| /* TODO: add support for dh_blob */ |
| if (dh_file == NULL) |
| return 0; |
| if (conn == NULL) |
| return -1; |
| |
| bio = BIO_new_file(dh_file, "r"); |
| if (bio == NULL) { |
| wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", |
| dh_file, ERR_error_string(ERR_get_error(), NULL)); |
| return -1; |
| } |
| dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| #ifndef OPENSSL_NO_DSA |
| while (dh == NULL) { |
| DSA *dsa; |
| wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" |
| " trying to parse as DSA params", dh_file, |
| ERR_error_string(ERR_get_error(), NULL)); |
| bio = BIO_new_file(dh_file, "r"); |
| if (bio == NULL) |
| break; |
| dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| if (!dsa) { |
| wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " |
| "'%s': %s", dh_file, |
| ERR_error_string(ERR_get_error(), NULL)); |
| break; |
| } |
| |
| wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); |
| dh = DSA_dup_DH(dsa); |
| DSA_free(dsa); |
| if (dh == NULL) { |
| wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " |
| "params into DH params"); |
| break; |
| } |
| break; |
| } |
| #endif /* !OPENSSL_NO_DSA */ |
| if (dh == NULL) { |
| wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " |
| "'%s'", dh_file); |
| return -1; |
| } |
| |
| if (SSL_set_tmp_dh(conn->ssl, dh) != 1) { |
| wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " |
| "%s", dh_file, |
| ERR_error_string(ERR_get_error(), NULL)); |
| DH_free(dh); |
| return -1; |
| } |
| DH_free(dh); |
| return 0; |
| #endif /* OPENSSL_NO_DH */ |
| } |
| |
| |
| static int tls_global_dh(SSL_CTX *ssl_ctx, const char *dh_file) |
| { |
| #ifdef OPENSSL_NO_DH |
| if (dh_file == NULL) |
| return 0; |
| wpa_printf(MSG_ERROR, "TLS: openssl does not include DH support, but " |
| "dh_file specified"); |
| return -1; |
| #else /* OPENSSL_NO_DH */ |
| DH *dh; |
| BIO *bio; |
| |
| /* TODO: add support for dh_blob */ |
| if (dh_file == NULL) |
| return 0; |
| if (ssl_ctx == NULL) |
| return -1; |
| |
| bio = BIO_new_file(dh_file, "r"); |
| if (bio == NULL) { |
| wpa_printf(MSG_INFO, "TLS: Failed to open DH file '%s': %s", |
| dh_file, ERR_error_string(ERR_get_error(), NULL)); |
| return -1; |
| } |
| dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| #ifndef OPENSSL_NO_DSA |
| while (dh == NULL) { |
| DSA *dsa; |
| wpa_printf(MSG_DEBUG, "TLS: Failed to parse DH file '%s': %s -" |
| " trying to parse as DSA params", dh_file, |
| ERR_error_string(ERR_get_error(), NULL)); |
| bio = BIO_new_file(dh_file, "r"); |
| if (bio == NULL) |
| break; |
| dsa = PEM_read_bio_DSAparams(bio, NULL, NULL, NULL); |
| BIO_free(bio); |
| if (!dsa) { |
| wpa_printf(MSG_DEBUG, "TLS: Failed to parse DSA file " |
| "'%s': %s", dh_file, |
| ERR_error_string(ERR_get_error(), NULL)); |
| break; |
| } |
| |
| wpa_printf(MSG_DEBUG, "TLS: DH file in DSA param format"); |
| dh = DSA_dup_DH(dsa); |
| DSA_free(dsa); |
| if (dh == NULL) { |
| wpa_printf(MSG_INFO, "TLS: Failed to convert DSA " |
| "params into DH params"); |
| break; |
| } |
| break; |
| } |
| #endif /* !OPENSSL_NO_DSA */ |
| if (dh == NULL) { |
| wpa_printf(MSG_INFO, "TLS: Failed to read/parse DH/DSA file " |
| "'%s'", dh_file); |
| return -1; |
| } |
| |
| if (SSL_CTX_set_tmp_dh(ssl_ctx, dh) != 1) { |
| wpa_printf(MSG_INFO, "TLS: Failed to set DH params from '%s': " |
| "%s", dh_file, |
| ERR_error_string(ERR_get_error(), NULL)); |
| DH_free(dh); |
| return -1; |
| } |
| DH_free(dh); |
| return 0; |
| #endif /* OPENSSL_NO_DH */ |
| } |
| |
| |
| int tls_connection_get_keys(void *ssl_ctx, struct tls_connection *conn, |
| struct tls_keys *keys) |
| { |
| #ifdef CONFIG_FIPS |
| wpa_printf(MSG_ERROR, "OpenSSL: TLS keys cannot be exported in FIPS " |
| "mode"); |
| return -1; |
| #else /* CONFIG_FIPS */ |
| SSL *ssl; |
| |
| if (conn == NULL || keys == NULL) |
| return -1; |
| ssl = conn->ssl; |
| if (ssl == NULL || ssl->s3 == NULL || ssl->session == NULL) |
| return -1; |
| |
| os_memset(keys, 0, sizeof(*keys)); |
| keys->master_key = ssl->session->master_key; |
| keys->master_key_len = ssl->session->master_key_length; |
| keys->client_random = ssl->s3->client_random; |
| keys->client_random_len = SSL3_RANDOM_SIZE; |
| keys->server_random = ssl->s3->server_random; |
| keys->server_random_len = SSL3_RANDOM_SIZE; |
| |
| return 0; |
| #endif /* CONFIG_FIPS */ |
| } |
| |
| |
| int tls_connection_prf(void *tls_ctx, struct tls_connection *conn, |
| const char *label, int server_random_first, |
| u8 *out, size_t out_len) |
| { |
| #if OPENSSL_VERSION_NUMBER >= 0x10001000L |
| SSL *ssl; |
| if (conn == NULL) |
| return -1; |
| if (server_random_first) |
| return -1; |
| ssl = conn->ssl; |
| if (SSL_export_keying_material(ssl, out, out_len, label, |
| os_strlen(label), NULL, 0, 0) == 1) { |
| wpa_printf(MSG_DEBUG, "OpenSSL: Using internal PRF"); |
| return 0; |
| } |
| #endif |
| return -1; |
| } |
| |
| |
| static struct wpabuf * |
| openssl_handshake(struct tls_connection *conn, const struct wpabuf *in_data, |
| int server) |
| { |
| int res; |
| struct wpabuf *out_data; |
| |
| /* |
| * Give TLS handshake data from the server (if available) to OpenSSL |
| * for processing. |
| */ |
| if (in_data && |
| BIO_write(conn->ssl_in, wpabuf_head(in_data), wpabuf_len(in_data)) |
| < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Handshake failed - BIO_write"); |
| return NULL; |
| } |
| |
| /* Initiate TLS handshake or continue the existing handshake */ |
| if (server) |
| res = SSL_accept(conn->ssl); |
| else |
| res = SSL_connect(conn->ssl); |
| if (res != 1) { |
| int err = SSL_get_error(conn->ssl, res); |
| if (err == SSL_ERROR_WANT_READ) |
| wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want " |
| "more data"); |
| else if (err == SSL_ERROR_WANT_WRITE) |
| wpa_printf(MSG_DEBUG, "SSL: SSL_connect - want to " |
| "write"); |
| else { |
| tls_show_errors(MSG_INFO, __func__, "SSL_connect"); |
| conn->failed++; |
| } |
| } |
| |
| /* Get the TLS handshake data to be sent to the server */ |
| res = BIO_ctrl_pending(conn->ssl_out); |
| wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res); |
| out_data = wpabuf_alloc(res); |
| if (out_data == NULL) { |
| wpa_printf(MSG_DEBUG, "SSL: Failed to allocate memory for " |
| "handshake output (%d bytes)", res); |
| if (BIO_reset(conn->ssl_out) < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "BIO_reset failed"); |
| } |
| return NULL; |
| } |
| res = res == 0 ? 0 : BIO_read(conn->ssl_out, wpabuf_mhead(out_data), |
| res); |
| if (res < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Handshake failed - BIO_read"); |
| if (BIO_reset(conn->ssl_out) < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "BIO_reset failed"); |
| } |
| wpabuf_free(out_data); |
| return NULL; |
| } |
| wpabuf_put(out_data, res); |
| |
| return out_data; |
| } |
| |
| |
| static struct wpabuf * |
| openssl_get_appl_data(struct tls_connection *conn, size_t max_len) |
| { |
| struct wpabuf *appl_data; |
| int res; |
| |
| appl_data = wpabuf_alloc(max_len + 100); |
| if (appl_data == NULL) |
| return NULL; |
| |
| res = SSL_read(conn->ssl, wpabuf_mhead(appl_data), |
| wpabuf_size(appl_data)); |
| if (res < 0) { |
| int err = SSL_get_error(conn->ssl, res); |
| if (err == SSL_ERROR_WANT_READ || |
| err == SSL_ERROR_WANT_WRITE) { |
| wpa_printf(MSG_DEBUG, "SSL: No Application Data " |
| "included"); |
| } else { |
| tls_show_errors(MSG_INFO, __func__, |
| "Failed to read possible " |
| "Application Data"); |
| } |
| wpabuf_free(appl_data); |
| return NULL; |
| } |
| |
| wpabuf_put(appl_data, res); |
| wpa_hexdump_buf_key(MSG_MSGDUMP, "SSL: Application Data in Finished " |
| "message", appl_data); |
| |
| return appl_data; |
| } |
| |
| |
| static struct wpabuf * |
| openssl_connection_handshake(struct tls_connection *conn, |
| const struct wpabuf *in_data, |
| struct wpabuf **appl_data, int server) |
| { |
| struct wpabuf *out_data; |
| |
| if (appl_data) |
| *appl_data = NULL; |
| |
| out_data = openssl_handshake(conn, in_data, server); |
| if (out_data == NULL) |
| return NULL; |
| |
| if (SSL_is_init_finished(conn->ssl) && appl_data && in_data) |
| *appl_data = openssl_get_appl_data(conn, wpabuf_len(in_data)); |
| |
| return out_data; |
| } |
| |
| |
| struct wpabuf * |
| tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn, |
| const struct wpabuf *in_data, |
| struct wpabuf **appl_data) |
| { |
| return openssl_connection_handshake(conn, in_data, appl_data, 0); |
| } |
| |
| |
| struct wpabuf * tls_connection_server_handshake(void *tls_ctx, |
| struct tls_connection *conn, |
| const struct wpabuf *in_data, |
| struct wpabuf **appl_data) |
| { |
| return openssl_connection_handshake(conn, in_data, appl_data, 1); |
| } |
| |
| |
| struct wpabuf * tls_connection_encrypt(void *tls_ctx, |
| struct tls_connection *conn, |
| const struct wpabuf *in_data) |
| { |
| int res; |
| struct wpabuf *buf; |
| |
| if (conn == NULL) |
| return NULL; |
| |
| /* Give plaintext data for OpenSSL to encrypt into the TLS tunnel. */ |
| if ((res = BIO_reset(conn->ssl_in)) < 0 || |
| (res = BIO_reset(conn->ssl_out)) < 0) { |
| tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); |
| return NULL; |
| } |
| res = SSL_write(conn->ssl, wpabuf_head(in_data), wpabuf_len(in_data)); |
| if (res < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Encryption failed - SSL_write"); |
| return NULL; |
| } |
| |
| /* Read encrypted data to be sent to the server */ |
| buf = wpabuf_alloc(wpabuf_len(in_data) + 300); |
| if (buf == NULL) |
| return NULL; |
| res = BIO_read(conn->ssl_out, wpabuf_mhead(buf), wpabuf_size(buf)); |
| if (res < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Encryption failed - BIO_read"); |
| wpabuf_free(buf); |
| return NULL; |
| } |
| wpabuf_put(buf, res); |
| |
| return buf; |
| } |
| |
| |
| struct wpabuf * tls_connection_decrypt(void *tls_ctx, |
| struct tls_connection *conn, |
| const struct wpabuf *in_data) |
| { |
| int res; |
| struct wpabuf *buf; |
| |
| /* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */ |
| res = BIO_write(conn->ssl_in, wpabuf_head(in_data), |
| wpabuf_len(in_data)); |
| if (res < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Decryption failed - BIO_write"); |
| return NULL; |
| } |
| if (BIO_reset(conn->ssl_out) < 0) { |
| tls_show_errors(MSG_INFO, __func__, "BIO_reset failed"); |
| return NULL; |
| } |
| |
| /* Read decrypted data for further processing */ |
| /* |
| * Even though we try to disable TLS compression, it is possible that |
| * this cannot be done with all TLS libraries. Add extra buffer space |
| * to handle the possibility of the decrypted data being longer than |
| * input data. |
| */ |
| buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3); |
| if (buf == NULL) |
| return NULL; |
| res = SSL_read(conn->ssl, wpabuf_mhead(buf), wpabuf_size(buf)); |
| if (res < 0) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Decryption failed - SSL_read"); |
| wpabuf_free(buf); |
| return NULL; |
| } |
| wpabuf_put(buf, res); |
| |
| return buf; |
| } |
| |
| |
| int tls_connection_resumed(void *ssl_ctx, struct tls_connection *conn) |
| { |
| return conn ? conn->ssl->hit : 0; |
| } |
| |
| |
| int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn, |
| u8 *ciphers) |
| { |
| char buf[100], *pos, *end; |
| u8 *c; |
| int ret; |
| |
| if (conn == NULL || conn->ssl == NULL || ciphers == NULL) |
| return -1; |
| |
| buf[0] = '\0'; |
| pos = buf; |
| end = pos + sizeof(buf); |
| |
| c = ciphers; |
| while (*c != TLS_CIPHER_NONE) { |
| const char *suite; |
| |
| switch (*c) { |
| case TLS_CIPHER_RC4_SHA: |
| suite = "RC4-SHA"; |
| break; |
| case TLS_CIPHER_AES128_SHA: |
| suite = "AES128-SHA"; |
| break; |
| case TLS_CIPHER_RSA_DHE_AES128_SHA: |
| suite = "DHE-RSA-AES128-SHA"; |
| break; |
| case TLS_CIPHER_ANON_DH_AES128_SHA: |
| suite = "ADH-AES128-SHA"; |
| break; |
| default: |
| wpa_printf(MSG_DEBUG, "TLS: Unsupported " |
| "cipher selection: %d", *c); |
| return -1; |
| } |
| ret = os_snprintf(pos, end - pos, ":%s", suite); |
| if (ret < 0 || ret >= end - pos) |
| break; |
| pos += ret; |
| |
| c++; |
| } |
| |
| wpa_printf(MSG_DEBUG, "OpenSSL: cipher suites: %s", buf + 1); |
| |
| if (SSL_set_cipher_list(conn->ssl, buf + 1) != 1) { |
| tls_show_errors(MSG_INFO, __func__, |
| "Cipher suite configuration failed"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| |
| int tls_get_cipher(void *ssl_ctx, struct tls_connection *conn, |
| char *buf, size_t buflen) |
| { |
| const char *name; |
| if (conn == NULL || conn->ssl == NULL) |
| return -1; |
| |
| name = SSL_get_cipher(conn->ssl); |
| if (name == NULL) |
| return -1; |
| |
| os_strlcpy(buf, name, buflen); |
| return 0; |
| } |
| |
| |
| int tls_connection_enable_workaround(void *ssl_ctx, |
| struct tls_connection *conn) |
| { |
| SSL_set_options(conn->ssl, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS); |
| |
| return 0; |
| } |
| |
| |
| #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) |
| /* ClientHello TLS extensions require a patch to openssl, so this function is |
| * commented out unless explicitly needed for EAP-FAST in order to be able to |
| * build this file with unmodified openssl. */ |
| int tls_connection_client_hello_ext(void *ssl_ctx, struct tls_connection *conn, |
| int ext_type, const u8 *data, |
| size_t data_len) |
| { |
| if (conn == NULL || conn->ssl == NULL || ext_type != 35) |
| return -1; |
| |
| #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
| if (SSL_set_session_ticket_ext(conn->ssl, (void *) data, |
| data_len) != 1) |
| return -1; |
| #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| if (SSL_set_hello_extension(conn->ssl, ext_type, (void *) data, |
| data_len) != 1) |
| return -1; |
| #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| |
| return 0; |
| } |
| #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
| |
| |
| int tls_connection_get_failed(void *ssl_ctx, struct tls_connection *conn) |
| { |
| if (conn == NULL) |
| return -1; |
| return conn->failed; |
| } |
| |
| |
| int tls_connection_get_read_alerts(void *ssl_ctx, struct tls_connection *conn) |
| { |
| if (conn == NULL) |
| return -1; |
| return conn->read_alerts; |
| } |
| |
| |
| int tls_connection_get_write_alerts(void *ssl_ctx, struct tls_connection *conn) |
| { |
| if (conn == NULL) |
| return -1; |
| return conn->write_alerts; |
| } |
| |
| |
| int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn, |
| const struct tls_connection_params *params) |
| { |
| int ret; |
| unsigned long err; |
| |
| if (conn == NULL) |
| return -1; |
| |
| while ((err = ERR_get_error())) { |
| wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", |
| __func__, ERR_error_string(err, NULL)); |
| } |
| |
| if (params->engine) { |
| wpa_printf(MSG_DEBUG, "SSL: Initializing TLS engine"); |
| ret = tls_engine_init(conn, params->engine_id, params->pin, |
| params->key_id, params->cert_id, |
| params->ca_cert_id); |
| if (ret) |
| return ret; |
| } |
| if (tls_connection_set_subject_match(conn, |
| params->subject_match, |
| params->altsubject_match)) |
| return -1; |
| |
| if (params->engine && params->ca_cert_id) { |
| if (tls_connection_engine_ca_cert(tls_ctx, conn, |
| params->ca_cert_id)) |
| return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; |
| } else if (tls_connection_ca_cert(tls_ctx, conn, params->ca_cert, |
| params->ca_cert_blob, |
| params->ca_cert_blob_len, |
| params->ca_path)) |
| return -1; |
| |
| if (params->engine && params->cert_id) { |
| if (tls_connection_engine_client_cert(conn, params->cert_id)) |
| return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; |
| } else if (tls_connection_client_cert(conn, params->client_cert, |
| params->client_cert_blob, |
| params->client_cert_blob_len)) |
| return -1; |
| |
| if (params->engine && params->key_id) { |
| wpa_printf(MSG_DEBUG, "TLS: Using private key from engine"); |
| if (tls_connection_engine_private_key(conn)) |
| return TLS_SET_PARAMS_ENGINE_PRV_VERIFY_FAILED; |
| } else if (tls_connection_private_key(tls_ctx, conn, |
| params->private_key, |
| params->private_key_passwd, |
| params->private_key_blob, |
| params->private_key_blob_len)) { |
| wpa_printf(MSG_INFO, "TLS: Failed to load private key '%s'", |
| params->private_key); |
| return -1; |
| } |
| |
| if (tls_connection_dh(conn, params->dh_file)) { |
| wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", |
| params->dh_file); |
| return -1; |
| } |
| |
| #ifdef SSL_OP_NO_TICKET |
| if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) |
| SSL_set_options(conn->ssl, SSL_OP_NO_TICKET); |
| else |
| SSL_clear_options(conn->ssl, SSL_OP_NO_TICKET); |
| #endif /* SSL_OP_NO_TICKET */ |
| |
| conn->flags = params->flags; |
| |
| tls_get_errors(tls_ctx); |
| |
| return 0; |
| } |
| |
| |
| int tls_global_set_params(void *tls_ctx, |
| const struct tls_connection_params *params) |
| { |
| SSL_CTX *ssl_ctx = tls_ctx; |
| unsigned long err; |
| |
| while ((err = ERR_get_error())) { |
| wpa_printf(MSG_INFO, "%s: Clearing pending SSL error: %s", |
| __func__, ERR_error_string(err, NULL)); |
| } |
| |
| if (tls_global_ca_cert(ssl_ctx, params->ca_cert)) |
| return -1; |
| |
| if (tls_global_client_cert(ssl_ctx, params->client_cert)) |
| return -1; |
| |
| if (tls_global_private_key(ssl_ctx, params->private_key, |
| params->private_key_passwd)) |
| return -1; |
| |
| if (tls_global_dh(ssl_ctx, params->dh_file)) { |
| wpa_printf(MSG_INFO, "TLS: Failed to load DH file '%s'", |
| params->dh_file); |
| return -1; |
| } |
| |
| #ifdef SSL_OP_NO_TICKET |
| if (params->flags & TLS_CONN_DISABLE_SESSION_TICKET) |
| SSL_CTX_set_options(ssl_ctx, SSL_OP_NO_TICKET); |
| else |
| SSL_CTX_clear_options(ssl_ctx, SSL_OP_NO_TICKET); |
| #endif /* SSL_OP_NO_TICKET */ |
| |
| return 0; |
| } |
| |
| |
| int tls_connection_get_keyblock_size(void *tls_ctx, |
| struct tls_connection *conn) |
| { |
| const EVP_CIPHER *c; |
| const EVP_MD *h; |
| int md_size; |
| |
| if (conn == NULL || conn->ssl == NULL || |
| conn->ssl->enc_read_ctx == NULL || |
| conn->ssl->enc_read_ctx->cipher == NULL || |
| conn->ssl->read_hash == NULL) |
| return -1; |
| |
| c = conn->ssl->enc_read_ctx->cipher; |
| #if OPENSSL_VERSION_NUMBER >= 0x00909000L |
| h = EVP_MD_CTX_md(conn->ssl->read_hash); |
| #else |
| h = conn->ssl->read_hash; |
| #endif |
| if (h) |
| md_size = EVP_MD_size(h); |
| #if OPENSSL_VERSION_NUMBER >= 0x10000000L |
| else if (conn->ssl->s3) |
| md_size = conn->ssl->s3->tmp.new_mac_secret_size; |
| #endif |
| else |
| return -1; |
| |
| wpa_printf(MSG_DEBUG, "OpenSSL: keyblock size: key_len=%d MD_size=%d " |
| "IV_len=%d", EVP_CIPHER_key_length(c), md_size, |
| EVP_CIPHER_iv_length(c)); |
| return 2 * (EVP_CIPHER_key_length(c) + |
| md_size + |
| EVP_CIPHER_iv_length(c)); |
| } |
| |
| |
| unsigned int tls_capabilities(void *tls_ctx) |
| { |
| return 0; |
| } |
| |
| |
| #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) |
| /* Pre-shared secred requires a patch to openssl, so this function is |
| * commented out unless explicitly needed for EAP-FAST in order to be able to |
| * build this file with unmodified openssl. */ |
| |
| static int tls_sess_sec_cb(SSL *s, void *secret, int *secret_len, |
| STACK_OF(SSL_CIPHER) *peer_ciphers, |
| SSL_CIPHER **cipher, void *arg) |
| { |
| struct tls_connection *conn = arg; |
| int ret; |
| |
| if (conn == NULL || conn->session_ticket_cb == NULL) |
| return 0; |
| |
| ret = conn->session_ticket_cb(conn->session_ticket_cb_ctx, |
| conn->session_ticket, |
| conn->session_ticket_len, |
| s->s3->client_random, |
| s->s3->server_random, secret); |
| os_free(conn->session_ticket); |
| conn->session_ticket = NULL; |
| |
| if (ret <= 0) |
| return 0; |
| |
| *secret_len = SSL_MAX_MASTER_KEY_LENGTH; |
| return 1; |
| } |
| |
| |
| #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
| static int tls_session_ticket_ext_cb(SSL *s, const unsigned char *data, |
| int len, void *arg) |
| { |
| struct tls_connection *conn = arg; |
| |
| if (conn == NULL || conn->session_ticket_cb == NULL) |
| return 0; |
| |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s: length=%d", __func__, len); |
| |
| os_free(conn->session_ticket); |
| conn->session_ticket = NULL; |
| |
| wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " |
| "extension", data, len); |
| |
| conn->session_ticket = os_malloc(len); |
| if (conn->session_ticket == NULL) |
| return 0; |
| |
| os_memcpy(conn->session_ticket, data, len); |
| conn->session_ticket_len = len; |
| |
| return 1; |
| } |
| #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| #ifdef SSL_OP_NO_TICKET |
| static void tls_hello_ext_cb(SSL *s, int client_server, int type, |
| unsigned char *data, int len, void *arg) |
| { |
| struct tls_connection *conn = arg; |
| |
| if (conn == NULL || conn->session_ticket_cb == NULL) |
| return; |
| |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, |
| type, len); |
| |
| if (type == TLSEXT_TYPE_session_ticket && !client_server) { |
| os_free(conn->session_ticket); |
| conn->session_ticket = NULL; |
| |
| wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " |
| "extension", data, len); |
| conn->session_ticket = os_malloc(len); |
| if (conn->session_ticket == NULL) |
| return; |
| |
| os_memcpy(conn->session_ticket, data, len); |
| conn->session_ticket_len = len; |
| } |
| } |
| #else /* SSL_OP_NO_TICKET */ |
| static int tls_hello_ext_cb(SSL *s, TLS_EXTENSION *ext, void *arg) |
| { |
| struct tls_connection *conn = arg; |
| |
| if (conn == NULL || conn->session_ticket_cb == NULL) |
| return 0; |
| |
| wpa_printf(MSG_DEBUG, "OpenSSL: %s: type=%d length=%d", __func__, |
| ext->type, ext->length); |
| |
| os_free(conn->session_ticket); |
| conn->session_ticket = NULL; |
| |
| if (ext->type == 35) { |
| wpa_hexdump(MSG_DEBUG, "OpenSSL: ClientHello SessionTicket " |
| "extension", ext->data, ext->length); |
| conn->session_ticket = os_malloc(ext->length); |
| if (conn->session_ticket == NULL) |
| return SSL_AD_INTERNAL_ERROR; |
| |
| os_memcpy(conn->session_ticket, ext->data, ext->length); |
| conn->session_ticket_len = ext->length; |
| } |
| |
| return 0; |
| } |
| #endif /* SSL_OP_NO_TICKET */ |
| #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
| |
| |
| int tls_connection_set_session_ticket_cb(void *tls_ctx, |
| struct tls_connection *conn, |
| tls_session_ticket_cb cb, |
| void *ctx) |
| { |
| #if defined(EAP_FAST) || defined(EAP_FAST_DYNAMIC) || defined(EAP_SERVER_FAST) |
| conn->session_ticket_cb = cb; |
| conn->session_ticket_cb_ctx = ctx; |
| |
| if (cb) { |
| if (SSL_set_session_secret_cb(conn->ssl, tls_sess_sec_cb, |
| conn) != 1) |
| return -1; |
| #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
| SSL_set_session_ticket_ext_cb(conn->ssl, |
| tls_session_ticket_ext_cb, conn); |
| #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| #ifdef SSL_OP_NO_TICKET |
| SSL_set_tlsext_debug_callback(conn->ssl, tls_hello_ext_cb); |
| SSL_set_tlsext_debug_arg(conn->ssl, conn); |
| #else /* SSL_OP_NO_TICKET */ |
| if (SSL_set_hello_extension_cb(conn->ssl, tls_hello_ext_cb, |
| conn) != 1) |
| return -1; |
| #endif /* SSL_OP_NO_TICKET */ |
| #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| } else { |
| if (SSL_set_session_secret_cb(conn->ssl, NULL, NULL) != 1) |
| return -1; |
| #ifdef CONFIG_OPENSSL_TICKET_OVERRIDE |
| SSL_set_session_ticket_ext_cb(conn->ssl, NULL, NULL); |
| #else /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| #ifdef SSL_OP_NO_TICKET |
| SSL_set_tlsext_debug_callback(conn->ssl, NULL); |
| SSL_set_tlsext_debug_arg(conn->ssl, conn); |
| #else /* SSL_OP_NO_TICKET */ |
| if (SSL_set_hello_extension_cb(conn->ssl, NULL, NULL) != 1) |
| return -1; |
| #endif /* SSL_OP_NO_TICKET */ |
| #endif /* CONFIG_OPENSSL_TICKET_OVERRIDE */ |
| } |
| |
| return 0; |
| #else /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
| return -1; |
| #endif /* EAP_FAST || EAP_FAST_DYNAMIC || EAP_SERVER_FAST */ |
| } |