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fragattacks/src/crypto/tls_openssl.c
Jouni Malinen 76f04b38b0 Preliminary support for FIPS mode operation with OpenSSL 
wpa_supplicant can now be built with FIPS capable OpenSSL for FIPS mode
operation. Currently, this is only enabling the FIPS mode in OpenSSL
without providing any higher level enforcement in wpa_supplicant.
Consequently, invalid configuration will fail during the authentication
run. Proper configuration (e.g., WPA2-Enterprise with EAP-TLS) allows
the connection to be completed.
2009-08-16 14:24:22 +03:00

2742 lines
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/*
* WPA Supplicant / SSL/TLS interface functions for openssl
* Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING 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 */
#include "common.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_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;
};
#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 CALG_SSL3_SHAMD5 (ALG_CLASS_HASH | ALG_TYPE_ANY | ALG_SID_SSL3SHAMD5)
#define CERT_SYSTEM_STORE_CURRENT_USER (1 << 16)
#define CERT_STORE_READONLY_FLAG 0x00008000
#define CERT_STORE_OPEN_EXISTING_FLAG 0x00004000
#define CRYPT_ACQUIRE_COMPARE_KEY_FLAG 0x00000004
static BOOL WINAPI
(*CryptAcquireCertificatePrivateKey)(PCCERT_CONTEXT pCert, DWORD dwFlags,
void *pvReserved, HCRYPTPROV *phCryptProv,
DWORD *pdwKeySpec, BOOL *pfCallerFreeProv)
= NULL; /* to be loaded from crypt32.dll */
#ifdef CONFIG_MINGW32_LOAD_CERTENUM
static PCCERT_CONTEXT WINAPI
(*CertEnumCertificatesInStore)(HCERTSTORE hCertStore,
PCCERT_CONTEXT pPrevCertContext)
= NULL; /* to be loaded from crypt32.dll */
#endif /* CONFIG_MINGW32_LOAD_CERTENUM */
static int mingw_load_crypto_func(void)
{
HINSTANCE dll;
/* MinGW does not yet have full CryptoAPI support, so load the needed
* function here. */
if (CryptAcquireCertificatePrivateKey)
return 0;
dll = LoadLibrary("crypt32");
if (dll == NULL) {
wpa_printf(MSG_DEBUG, "CryptoAPI: Could not load crypt32 "
"library");
return -1;
}
CryptAcquireCertificatePrivateKey = GetProcAddress(
dll, "CryptAcquireCertificatePrivateKey");
if (CryptAcquireCertificatePrivateKey == NULL) {
wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
"CryptAcquireCertificatePrivateKey() address from "
"crypt32 library");
return -1;
}
#ifdef CONFIG_MINGW32_LOAD_CERTENUM
CertEnumCertificatesInStore = (void *) GetProcAddress(
dll, "CertEnumCertificatesInStore");
if (CertEnumCertificatesInStore == NULL) {
wpa_printf(MSG_DEBUG, "CryptoAPI: Could not get "
"CertEnumCertificatesInStore() address from "
"crypt32 library");
return -1;
}
#endif /* CONFIG_MINGW32_LOAD_CERTENUM */
return 0;
}
#else /* __MINGW32_VERSION */
static int mingw_load_crypto_func(void)
{
return 0;
}
#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 (mingw_load_crypto_func())
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 (mingw_load_crypto_func())
return -1;
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++;
}
} 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) {
#ifdef CONFIG_FIPS
#ifdef OPENSSL_FIPS
if (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);
return NULL;
} else
wpa_printf(MSG_INFO, "Running in FIPS mode");
}
#else /* OPENSSL_FIPS */
if (conf->fips_mode) {
wpa_printf(MSG_ERROR, "FIPS mode requested, but not "
"supported");
return NULL;
}
#endif /* OPENSSL_FIPS */
#endif /* CONFIG_FIPS */
SSL_load_error_strings();
SSL_library_init();
#ifndef 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
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();
}
}
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 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;
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);
match = conn ? conn->subject_match : NULL;
altmatch = conn ? conn->altsubject_match : NULL;
if (!preverify_ok) {
wpa_printf(MSG_WARNING, "TLS: Certificate verification failed,"
" error %d (%s) depth %d for '%s'", err,
X509_verify_cert_error_string(err), depth, buf);
} else {
wpa_printf(MSG_DEBUG, "TLS: tls_verify_cb - "
"preverify_ok=%d err=%d (%s) depth=%d buf='%s'",
preverify_ok, err,
X509_verify_cert_error_string(err), 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;
} 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;
}
}
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 */
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;
}
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__);
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
return 0;
}
#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");
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
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);
}
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER, tls_verify_cb);
#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 */
SSL_set_verify(conn->ssl, SSL_VERIFY_NONE, NULL);
}
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) {
SSL_set_verify(conn->ssl, SSL_VERIFY_PEER |
SSL_VERIFY_FAIL_IF_NO_PEER_CERT |
SSL_VERIFY_CLIENT_ONCE, tls_verify_cb);
} else {
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;
#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;
} else {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_certificate_file (DER) failed");
}
if (SSL_use_certificate_file(conn->ssl, client_cert,
SSL_FILETYPE_PEM) == 1) {
wpa_printf(MSG_DEBUG, "OpenSSL: SSL_use_certificate_file (PEM)"
" --> OK");
return 0;
} else {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_certificate_file (PEM) 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_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, &params, 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);
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;
} else {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_PrivateKey_ASN1(EVP_PKEY_RSA)"
" failed");
}
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;
} else {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_PrivateKey_ASN1(EVP_PKEY_DSA)"
" failed");
}
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;
} else {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_RSAPrivateKey_ASN1 failed");
}
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;
}
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;
} else {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_PrivateKey_File (DER) "
"failed");
}
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 {
tls_show_errors(MSG_DEBUG, __func__,
"SSL_use_PrivateKey_File (PEM) "
"failed");
}
#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) {
wpa_printf(MSG_INFO, "OpenSSL: Failed to load private key");
os_free(passwd);
ERR_clear_error();
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)
{
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;
}
int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
const char *label, int server_random_first,
u8 *out, size_t out_len)
{
return -1;
}
u8 * tls_connection_handshake(void *ssl_ctx, struct tls_connection *conn,
const u8 *in_data, size_t in_len,
size_t *out_len, u8 **appl_data,
size_t *appl_data_len)
{
int res;
u8 *out_data;
if (appl_data)
*appl_data = NULL;
/*
* Give TLS handshake data from the server (if available) to OpenSSL
* for processing.
*/
if (in_data &&
BIO_write(conn->ssl_in, in_data, in_len) < 0) {
tls_show_errors(MSG_INFO, __func__,
"Handshake failed - BIO_write");
return NULL;
}
/* Initiate TLS handshake or continue the existing handshake */
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 = os_malloc(res == 0 ? 1 : 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");
}
*out_len = 0;
return NULL;
}
res = res == 0 ? 0 : BIO_read(conn->ssl_out, 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");
}
*out_len = 0;
return NULL;
}
*out_len = res;
if (SSL_is_init_finished(conn->ssl) && appl_data) {
*appl_data = os_malloc(in_len);
if (*appl_data) {
res = SSL_read(conn->ssl, *appl_data, in_len);
if (res < 0) {
tls_show_errors(MSG_INFO, __func__,
"Failed to read possible "
"Application Data");
os_free(*appl_data);
*appl_data = NULL;
} else {
*appl_data_len = res;
wpa_hexdump_key(MSG_MSGDUMP, "SSL: Application"
" Data in Finish message",
*appl_data, *appl_data_len);
}
}
}
return out_data;
}
u8 * tls_connection_server_handshake(void *ssl_ctx,
struct tls_connection *conn,
const u8 *in_data, size_t in_len,
size_t *out_len)
{
int res;
u8 *out_data;
/*
* Give TLS handshake data from the client (if available) to OpenSSL
* for processing.
*/
if (in_data &&
BIO_write(conn->ssl_in, in_data, in_len) < 0) {
tls_show_errors(MSG_INFO, __func__,
"Handshake failed - BIO_write");
return NULL;
}
/* Initiate TLS handshake or continue the existing handshake */
res = SSL_accept(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_accept - want "
"more data");
else if (err == SSL_ERROR_WANT_WRITE)
wpa_printf(MSG_DEBUG, "SSL: SSL_accept - want to "
"write");
else {
tls_show_errors(MSG_INFO, __func__, "SSL_accept");
return NULL;
}
}
/* Get the TLS handshake data to be sent to the client */
res = BIO_ctrl_pending(conn->ssl_out);
wpa_printf(MSG_DEBUG, "SSL: %d bytes pending from ssl_out", res);
out_data = os_malloc(res == 0 ? 1 : 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");
}
*out_len = 0;
return NULL;
}
res = res == 0 ? 0 : BIO_read(conn->ssl_out, 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");
}
*out_len = 0;
return NULL;
}
*out_len = res;
return out_data;
}
int tls_connection_encrypt(void *ssl_ctx, struct tls_connection *conn,
const u8 *in_data, size_t in_len,
u8 *out_data, size_t out_len)
{
int res;
if (conn == NULL)
return -1;
/* 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 res;
}
res = SSL_write(conn->ssl, in_data, in_len);
if (res < 0) {
tls_show_errors(MSG_INFO, __func__,
"Encryption failed - SSL_write");
return res;
}
/* Read encrypted data to be sent to the server */
res = BIO_read(conn->ssl_out, out_data, out_len);
if (res < 0) {
tls_show_errors(MSG_INFO, __func__,
"Encryption failed - BIO_read");
return res;
}
return res;
}
int tls_connection_decrypt(void *ssl_ctx, struct tls_connection *conn,
const u8 *in_data, size_t in_len,
u8 *out_data, size_t out_len)
{
int res;
/* Give encrypted data from TLS tunnel for OpenSSL to decrypt. */
res = BIO_write(conn->ssl_in, in_data, in_len);
if (res < 0) {
tls_show_errors(MSG_INFO, __func__,
"Decryption failed - BIO_write");
return res;
}
if (BIO_reset(conn->ssl_out) < 0) {
tls_show_errors(MSG_INFO, __func__, "BIO_reset failed");
return res;
}
/* Read decrypted data for further processing */
res = SSL_read(conn->ssl, out_data, out_len);
if (res < 0) {
tls_show_errors(MSG_INFO, __func__,
"Decryption failed - SSL_read");
return res;
}
return res;
}
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;
}
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;
}
return 0;
}
int tls_connection_get_keyblock_size(void *tls_ctx,
struct tls_connection *conn)
{
const EVP_CIPHER *c;
const EVP_MD *h;
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
return 2 * (EVP_CIPHER_key_length(c) +
EVP_MD_size(h) +
EVP_CIPHER_iv_length(c));
}
unsigned int tls_capabilities(void *tls_ctx)
{
return 0;
}
int tls_connection_set_ia(void *tls_ctx, struct tls_connection *conn,
int tls_ia)
{
return -1;
}
int tls_connection_ia_send_phase_finished(void *tls_ctx,
struct tls_connection *conn,
int final,
u8 *out_data, size_t out_len)
{
return -1;
}
int tls_connection_ia_final_phase_finished(void *tls_ctx,
struct tls_connection *conn)
{
return -1;
}
int tls_connection_ia_permute_inner_secret(void *tls_ctx,
struct tls_connection *conn,
const u8 *key, size_t key_len)
{
return -1;
}
#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 */
}
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