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tls_openssl: Store TLS context per-connection

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Store context for each tls_init() caller, so events are generated for
the correct wpa_s instance. The tls_global variable is retained for
older OpenSSL implementations that may not have app-data for SSL_CTX.

Signed-hostap: Paul Stewart <pstew@chromium.org>
This commit is contained in:
Paul Stewart 2013-05-10 00:22:08 +03:00 committed by Jouni Malinen
parent 732118eca3
commit 7c0e1e2757
1 changed files with 70 additions and 24 deletions
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92
src/crypto/tls_openssl.c
View file

@ -37,6 +37,10 @@
#define OPENSSL_d2i_TYPE unsigned char ** #define OPENSSL_d2i_TYPE unsigned char **
#endif #endif
#if defined(SSL_CTX_get_app_data) && defined(SSL_CTX_set_app_data)
#define OPENSSL_SUPPORTS_CTX_APP_DATA
#endif
#ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT #ifdef SSL_F_SSL_SET_SESSION_TICKET_EXT
#ifdef SSL_OP_NO_TICKET #ifdef SSL_OP_NO_TICKET
/* /*
@ -49,17 +53,18 @@
static int tls_openssl_ref_count = 0; static int tls_openssl_ref_count = 0;
struct tls_global { struct tls_context {
void (*event_cb)(void *ctx, enum tls_event ev, void (*event_cb)(void *ctx, enum tls_event ev,
union tls_event_data *data); union tls_event_data *data);
void *cb_ctx; void *cb_ctx;
int cert_in_cb; int cert_in_cb;
}; };
static struct tls_global *tls_global = NULL; static struct tls_context *tls_global = NULL;
struct tls_connection { struct tls_connection {
struct tls_context *context;
SSL *ssl; SSL *ssl;
BIO *ssl_in, *ssl_out; BIO *ssl_in, *ssl_out;
#ifndef OPENSSL_NO_ENGINE #ifndef OPENSSL_NO_ENGINE
@ -86,6 +91,20 @@ struct tls_connection {
}; };
static struct tls_context * tls_context_new(const struct tls_config *conf)
{
struct tls_context *context = os_zalloc(sizeof(*context));
if (context == NULL)
return NULL;
if (conf) {
context->event_cb = conf->event_cb;
context->cb_ctx = conf->cb_ctx;
context->cert_in_cb = conf->cert_in_cb;
}
return context;
}
#ifdef CONFIG_NO_STDOUT_DEBUG #ifdef CONFIG_NO_STDOUT_DEBUG
static void _tls_show_errors(void) static void _tls_show_errors(void)
@ -511,6 +530,7 @@ static void ssl_info_cb(const SSL *ssl, int where, int ret)
wpa_printf(MSG_DEBUG, "SSL: %s:%s", wpa_printf(MSG_DEBUG, "SSL: %s:%s",
str, SSL_state_string_long(ssl)); str, SSL_state_string_long(ssl));
} else if (where & SSL_CB_ALERT) { } else if (where & SSL_CB_ALERT) {
struct tls_connection *conn = SSL_get_app_data((SSL *) ssl);
wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s", wpa_printf(MSG_INFO, "SSL: SSL3 alert: %s:%s:%s",
where & SSL_CB_READ ? where & SSL_CB_READ ?
"read (remote end reported an error)" : "read (remote end reported an error)" :
@ -518,21 +538,19 @@ static void ssl_info_cb(const SSL *ssl, int where, int ret)
SSL_alert_type_string_long(ret), SSL_alert_type_string_long(ret),
SSL_alert_desc_string_long(ret)); SSL_alert_desc_string_long(ret));
if ((ret >> 8) == SSL3_AL_FATAL) { if ((ret >> 8) == SSL3_AL_FATAL) {
struct tls_connection *conn =
SSL_get_app_data((SSL *) ssl);
if (where & SSL_CB_READ) if (where & SSL_CB_READ)
conn->read_alerts++; conn->read_alerts++;
else else
conn->write_alerts++; conn->write_alerts++;
} }
if (tls_global->event_cb != NULL) { if (conn->context->event_cb != NULL) {
union tls_event_data ev; union tls_event_data ev;
struct tls_context *context = conn->context;
os_memset(&ev, 0, sizeof(ev)); os_memset(&ev, 0, sizeof(ev));
ev.alert.is_local = !(where & SSL_CB_READ); ev.alert.is_local = !(where & SSL_CB_READ);
ev.alert.type = SSL_alert_type_string_long(ret); ev.alert.type = SSL_alert_type_string_long(ret);
ev.alert.description = SSL_alert_desc_string_long(ret); ev.alert.description = SSL_alert_desc_string_long(ret);
tls_global->event_cb(tls_global->cb_ctx, TLS_ALERT, context->event_cb(context->cb_ctx, TLS_ALERT, &ev);
&ev);
} }
} else if (where & SSL_CB_EXIT && ret <= 0) { } else if (where & SSL_CB_EXIT && ret <= 0) {
wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s", wpa_printf(MSG_DEBUG, "SSL: %s:%s in %s",
@ -690,17 +708,12 @@ static int tls_engine_load_dynamic_opensc(const char *opensc_so_path)
void * tls_init(const struct tls_config *conf) void * tls_init(const struct tls_config *conf)
{ {
SSL_CTX *ssl; SSL_CTX *ssl;
struct tls_context *context;
if (tls_openssl_ref_count == 0) { if (tls_openssl_ref_count == 0) {
tls_global = os_zalloc(sizeof(*tls_global)); tls_global = context = tls_context_new(conf);
if (tls_global == NULL) if (context == NULL)
return 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 CONFIG_FIPS
#ifdef OPENSSL_FIPS #ifdef OPENSSL_FIPS
if (conf && conf->fips_mode) { if (conf && conf->fips_mode) {
@ -746,14 +759,33 @@ void * tls_init(const struct tls_config *conf)
#endif /* OPENSSL_NO_RC2 */ #endif /* OPENSSL_NO_RC2 */
PKCS12_PBE_add(); PKCS12_PBE_add();
#endif /* PKCS12_FUNCS */ #endif /* PKCS12_FUNCS */
} else {
context = tls_global;
#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
/* Newer OpenSSL can store app-data per-SSL */
context = tls_context_new(conf);
if (context == NULL)
return NULL;
#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
} }
tls_openssl_ref_count++; tls_openssl_ref_count++;
ssl = SSL_CTX_new(TLSv1_method()); ssl = SSL_CTX_new(TLSv1_method());
if (ssl == NULL) if (ssl == NULL) {
tls_openssl_ref_count--;
if (tls_openssl_ref_count == 0) {
os_free(tls_global);
tls_global = NULL;
} else if (context != tls_global) {
os_free(context);
}
return NULL; return NULL;
}
SSL_CTX_set_info_callback(ssl, ssl_info_cb); SSL_CTX_set_info_callback(ssl, ssl_info_cb);
#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
SSL_CTX_set_app_data(ssl, context);
#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
#ifndef OPENSSL_NO_ENGINE #ifndef OPENSSL_NO_ENGINE
if (conf && if (conf &&
@ -779,6 +811,11 @@ void * tls_init(const struct tls_config *conf)
void tls_deinit(void *ssl_ctx) void tls_deinit(void *ssl_ctx)
{ {
SSL_CTX *ssl = ssl_ctx; SSL_CTX *ssl = ssl_ctx;
#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
struct tls_context *context = SSL_CTX_get_app_data(ssl);
if (context != tls_global)
os_free(context);
#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
SSL_CTX_free(ssl); SSL_CTX_free(ssl);
tls_openssl_ref_count--; tls_openssl_ref_count--;
@ -915,6 +952,10 @@ struct tls_connection * tls_connection_init(void *ssl_ctx)
SSL_CTX *ssl = ssl_ctx; SSL_CTX *ssl = ssl_ctx;
struct tls_connection *conn; struct tls_connection *conn;
long options; long options;
struct tls_context *context = tls_global;
#ifdef OPENSSL_SUPPORTS_CTX_APP_DATA
context = SSL_CTX_get_app_data(ssl);
#endif /* OPENSSL_SUPPORTS_CTX_APP_DATA */
conn = os_zalloc(sizeof(*conn)); conn = os_zalloc(sizeof(*conn));
if (conn == NULL) if (conn == NULL)
@ -927,6 +968,7 @@ struct tls_connection * tls_connection_init(void *ssl_ctx)
return NULL; return NULL;
} }
conn->context = context;
SSL_set_app_data(conn->ssl, conn); SSL_set_app_data(conn->ssl, conn);
options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
SSL_OP_SINGLE_DH_USE; SSL_OP_SINGLE_DH_USE;
@ -1122,8 +1164,9 @@ static void openssl_tls_fail_event(struct tls_connection *conn,
{ {
union tls_event_data ev; union tls_event_data ev;
struct wpabuf *cert = NULL; struct wpabuf *cert = NULL;
struct tls_context *context = conn->context;
if (tls_global->event_cb == NULL) if (context->event_cb == NULL)
return; return;
cert = get_x509_cert(err_cert); cert = get_x509_cert(err_cert);
@ -1134,7 +1177,7 @@ static void openssl_tls_fail_event(struct tls_connection *conn,
ev.cert_fail.subject = subject; ev.cert_fail.subject = subject;
ev.cert_fail.reason_txt = err_str; ev.cert_fail.reason_txt = err_str;
ev.cert_fail.cert = cert; ev.cert_fail.cert = cert;
tls_global->event_cb(tls_global->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev); context->event_cb(context->cb_ctx, TLS_CERT_CHAIN_FAILURE, &ev);
wpabuf_free(cert); wpabuf_free(cert);
} }
@ -1145,15 +1188,16 @@ static void openssl_tls_cert_event(struct tls_connection *conn,
{ {
struct wpabuf *cert = NULL; struct wpabuf *cert = NULL;
union tls_event_data ev; union tls_event_data ev;
struct tls_context *context = conn->context;
#ifdef CONFIG_SHA256 #ifdef CONFIG_SHA256
u8 hash[32]; u8 hash[32];
#endif /* CONFIG_SHA256 */ #endif /* CONFIG_SHA256 */
if (tls_global->event_cb == NULL) if (context->event_cb == NULL)
return; return;
os_memset(&ev, 0, sizeof(ev)); os_memset(&ev, 0, sizeof(ev));
if (conn->cert_probe || tls_global->cert_in_cb) { if (conn->cert_probe || context->cert_in_cb) {
cert = get_x509_cert(err_cert); cert = get_x509_cert(err_cert);
ev.peer_cert.cert = cert; ev.peer_cert.cert = cert;
} }
@ -1171,7 +1215,7 @@ static void openssl_tls_cert_event(struct tls_connection *conn,
#endif /* CONFIG_SHA256 */ #endif /* CONFIG_SHA256 */
ev.peer_cert.depth = depth; ev.peer_cert.depth = depth;
ev.peer_cert.subject = subject; ev.peer_cert.subject = subject;
tls_global->event_cb(tls_global->cb_ctx, TLS_PEER_CERTIFICATE, &ev); context->event_cb(context->cb_ctx, TLS_PEER_CERTIFICATE, &ev);
wpabuf_free(cert); wpabuf_free(cert);
} }
@ -1183,6 +1227,7 @@ static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
int err, depth; int err, depth;
SSL *ssl; SSL *ssl;
struct tls_connection *conn; struct tls_connection *conn;
struct tls_context *context;
char *match, *altmatch; char *match, *altmatch;
const char *err_str; const char *err_str;
@ -1196,6 +1241,7 @@ static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
conn = SSL_get_app_data(ssl); conn = SSL_get_app_data(ssl);
if (conn == NULL) if (conn == NULL)
return 0; return 0;
context = conn->context;
match = conn->subject_match; match = conn->subject_match;
altmatch = conn->altsubject_match; altmatch = conn->altsubject_match;
@ -1278,8 +1324,8 @@ static int tls_verify_cb(int preverify_ok, X509_STORE_CTX *x509_ctx)
TLS_FAIL_SERVER_CHAIN_PROBE); TLS_FAIL_SERVER_CHAIN_PROBE);
} }
if (preverify_ok && tls_global->event_cb != NULL) if (preverify_ok && context->event_cb != NULL)
tls_global->event_cb(tls_global->cb_ctx, context->event_cb(context->cb_ctx,
TLS_CERT_CHAIN_SUCCESS, NULL); TLS_CERT_CHAIN_SUCCESS, NULL);
return preverify_ok; return preverify_ok;