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Removing the peer from the SSL security connector.

Browse Source 
- Missing unit tests.
pull/4533/head
Julien Boeuf 9 years ago
parent 5b194036b2
commit 1d9ac6612d
6 changed files with 109 additions and 92 deletions
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  1. 5
      src/core/httpcli/httpcli_security_connector.c
  2. 22
      src/core/security/client_auth_filter.c
  3. 2
      src/core/security/credentials.c
  4. 137
      src/core/security/security_connector.c
  5. 33
      src/core/security/security_connector.h
  6. 2
      test/core/security/security_connector_test.c

5
src/core/httpcli/httpcli_security_connector.c
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@ -84,7 +84,8 @@ static void httpcli_ssl_do_handshake(grpc_exec_ctx *exec_ctx,
}
static void httpcli_ssl_check_peer(grpc_exec_ctx *exec_ctx,
grpc_security_connector *sc, tsi_peer peer,
grpc_security_connector *sc,
tsi_peer peer,
grpc_security_peer_check_cb cb,
void *user_data) {
grpc_httpcli_ssl_channel_security_connector *c =
@ -98,8 +99,8 @@ static void httpcli_ssl_check_peer(grpc_exec_ctx *exec_ctx,
c->secure_peer_name);
status = GRPC_SECURITY_ERROR;
}
tsi_peer_destruct(&peer);
cb(exec_ctx, user_data, status, NULL);
tsi_peer_destruct(&peer);
}
static grpc_security_connector_vtable httpcli_ssl_vtable = {

22
src/core/security/client_auth_filter.c
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@ -250,27 +250,13 @@ static void auth_start_transport_op(grpc_exec_ctx *exec_ctx,
}
}
if (calld->host != NULL) {
grpc_security_status status;
const char *call_host = grpc_mdstr_as_c_string(calld->host);
calld->op = *op; /* Copy op (originates from the caller's stack). */
status = grpc_channel_security_connector_check_call_host(
exec_ctx, chand->security_connector, call_host, on_host_checked,
elem);
if (status != GRPC_SECURITY_OK) {
if (status == GRPC_SECURITY_ERROR) {
char *error_msg;
gpr_asprintf(&error_msg,
"Invalid host %s set in :authority metadata.",
call_host);
bubble_up_error(exec_ctx, elem, GRPC_STATUS_INVALID_ARGUMENT,
error_msg);
gpr_free(error_msg);
}
return; /* early exit */
}
grpc_channel_security_connector_check_call_host(
exec_ctx, chand->security_connector, call_host, chand->auth_context,
on_host_checked, elem);
return; /* early exit */
}
send_security_metadata(exec_ctx, elem, op);
return; /* early exit */
}
/* pass control down the stack */

2
src/core/security/credentials.c
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@ -881,7 +881,7 @@ static grpc_security_status fake_transport_security_create_security_connector(
grpc_channel_credentials *c, grpc_call_credentials *call_creds,
const char *target, const grpc_channel_args *args,
grpc_channel_security_connector **sc, grpc_channel_args **new_args) {
*sc = grpc_fake_channel_security_connector_create(call_creds, 1);
*sc = grpc_fake_channel_security_connector_create(call_creds);
return GRPC_SECURITY_OK;
}

137
src/core/security/security_connector.c
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@ -130,22 +130,28 @@ void grpc_security_connector_do_handshake(grpc_exec_ctx *exec_ctx,
}
}
void grpc_security_connector_check_peer(
grpc_exec_ctx *exec_ctx, grpc_security_connector *sc, tsi_peer peer,
grpc_security_peer_check_cb cb, void *user_data) {
void grpc_security_connector_check_peer(grpc_exec_ctx *exec_ctx,
grpc_security_connector *sc,
tsi_peer peer,
grpc_security_peer_check_cb cb,
void *user_data) {
if (sc == NULL) {
tsi_peer_destruct(&peer);
cb(exec_ctx, user_data, GRPC_SECURITY_ERROR, NULL);
tsi_peer_destruct(&peer);
} else {
sc->vtable->check_peer(exec_ctx, sc, peer, cb, user_data);
}
}
grpc_security_status grpc_channel_security_connector_check_call_host(
void grpc_channel_security_connector_check_call_host(
grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc,
const char *host, grpc_security_call_host_check_cb cb, void *user_data) {
if (sc == NULL || sc->check_call_host == NULL) return GRPC_SECURITY_ERROR;
return sc->check_call_host(exec_ctx, sc, host, cb, user_data);
const char *host, grpc_auth_context *auth_context,
grpc_security_call_host_check_cb cb, void *user_data) {
if (sc == NULL || sc->check_call_host == NULL) {
cb(exec_ctx, user_data, GRPC_SECURITY_ERROR);
} else {
sc->check_call_host(exec_ctx, sc, host, auth_context, cb, user_data);
}
}
#ifdef GRPC_SECURITY_CONNECTOR_REFCOUNT_DEBUG
@ -222,11 +228,6 @@ grpc_security_connector *grpc_find_security_connector_in_args(
/* -- Fake implementation. -- */
typedef struct {
grpc_channel_security_connector base;
int call_host_check_is_async;
} grpc_fake_channel_security_connector;
static void fake_channel_destroy(grpc_security_connector *sc) {
grpc_channel_security_connector *c = (grpc_channel_security_connector *)sc;
grpc_call_credentials_unref(c->request_metadata_creds);
@ -270,21 +271,17 @@ static void fake_check_peer(grpc_exec_ctx *exec_ctx,
end:
cb(exec_ctx, user_data, status, auth_context);
tsi_peer_destruct(&peer);
grpc_auth_context_unref(auth_context);
tsi_peer_destruct(&peer);
}
static grpc_security_status fake_channel_check_call_host(
grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc,
const char *host, grpc_security_call_host_check_cb cb, void *user_data) {
grpc_fake_channel_security_connector *c =
(grpc_fake_channel_security_connector *)sc;
if (c->call_host_check_is_async) {
cb(exec_ctx, user_data, GRPC_SECURITY_OK);
return GRPC_SECURITY_PENDING;
} else {
return GRPC_SECURITY_OK;
}
static void fake_channel_check_call_host(grpc_exec_ctx *exec_ctx,
grpc_channel_security_connector *sc,
const char *host,
grpc_auth_context *auth_context,
grpc_security_call_host_check_cb cb,
void *user_data) {
cb(exec_ctx, user_data, GRPC_SECURITY_OK);
}
static void fake_channel_do_handshake(grpc_exec_ctx *exec_ctx,
@ -312,20 +309,17 @@ static grpc_security_connector_vtable fake_server_vtable = {
fake_server_destroy, fake_server_do_handshake, fake_check_peer};
grpc_channel_security_connector *grpc_fake_channel_security_connector_create(
grpc_call_credentials *request_metadata_creds,
int call_host_check_is_async) {
grpc_fake_channel_security_connector *c =
gpr_malloc(sizeof(grpc_fake_channel_security_connector));
memset(c, 0, sizeof(grpc_fake_channel_security_connector));
gpr_ref_init(&c->base.base.refcount, 1);
c->base.base.is_client_side = 1;
c->base.base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME;
c->base.base.vtable = &fake_channel_vtable;
c->base.request_metadata_creds =
grpc_call_credentials *request_metadata_creds) {
grpc_channel_security_connector *c = gpr_malloc(sizeof(*c));
memset(c, 0, sizeof(*c));
gpr_ref_init(&c->base.refcount, 1);
c->base.is_client_side = 1;
c->base.url_scheme = GRPC_FAKE_SECURITY_URL_SCHEME;
c->base.vtable = &fake_channel_vtable;
c->request_metadata_creds =
grpc_call_credentials_ref(request_metadata_creds);
c->base.check_call_host = fake_channel_check_call_host;
c->call_host_check_is_async = call_host_check_is_async;
return &c->base;
c->check_call_host = fake_channel_check_call_host;
return c;
}
grpc_security_connector *grpc_fake_server_security_connector_create(void) {
@ -346,9 +340,6 @@ typedef struct {
tsi_ssl_handshaker_factory *handshaker_factory;
char *target_name;
char *overridden_target_name;
/* TODO(jboeuf): Remove this: the security connector is channel-wide construct
as opposed to the peer which is for one transport (or sub-channel). */
tsi_peer peer;
} grpc_ssl_channel_security_connector;
typedef struct {
@ -365,7 +356,6 @@ static void ssl_channel_destroy(grpc_security_connector *sc) {
}
if (c->target_name != NULL) gpr_free(c->target_name);
if (c->overridden_target_name != NULL) gpr_free(c->overridden_target_name);
tsi_peer_destruct(&c->peer);
gpr_free(sc);
}
@ -517,14 +507,13 @@ static void ssl_channel_check_peer(
(grpc_ssl_channel_security_connector *)sc;
grpc_security_status status;
grpc_auth_context *auth_context = NULL;
tsi_peer_destruct(&c->peer);
c->peer = peer;
status = ssl_check_peer(sc, c->overridden_target_name != NULL
? c->overridden_target_name
: c->target_name,
&peer, &auth_context);
cb(exec_ctx, user_data, status, auth_context);
grpc_auth_context_unref(auth_context);
tsi_peer_destruct(&peer);
}
static void ssl_server_check_peer(
@ -537,22 +526,66 @@ static void ssl_server_check_peer(
grpc_auth_context_unref(auth_context);
}
static grpc_security_status ssl_channel_check_call_host(
grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc,
const char *host, grpc_security_call_host_check_cb cb, void *user_data) {
static void add_shalow_auth_property_to_peer(tsi_peer *peer,
const grpc_auth_property *prop,
const char *tsi_prop_name) {
tsi_peer_property *tsi_prop = &peer->properties[peer->property_count++];
tsi_prop->name = (char *)tsi_prop_name;
tsi_prop->value.data = prop->value;
tsi_prop->value.length = prop->value_length;
}
tsi_peer tsi_shallow_peer_from_ssl_auth_context(
const grpc_auth_context *auth_context) {
size_t max_num_props = 0;
grpc_auth_property_iterator it;
const grpc_auth_property *prop;
tsi_peer peer;
memset(&peer, 0, sizeof(peer));
it = grpc_auth_context_property_iterator(auth_context);
while (grpc_auth_property_iterator_next(&it) != NULL) max_num_props++;
if (max_num_props > 0) {
peer.properties = gpr_malloc(max_num_props * sizeof(tsi_peer_property));
it = grpc_auth_context_property_iterator(auth_context);
while ((prop = grpc_auth_property_iterator_next(&it)) != NULL) {
if (strcmp(prop->name, GRPC_X509_SAN_PROPERTY_NAME) == 0) {
add_shalow_auth_property_to_peer(
&peer, prop, TSI_X509_SUBJECT_ALTERNATIVE_NAME_PEER_PROPERTY);
} else if (strcmp(prop->name, GRPC_X509_CN_PROPERTY_NAME) == 0) {
add_shalow_auth_property_to_peer(
&peer, prop, TSI_X509_SUBJECT_COMMON_NAME_PEER_PROPERTY);
}
}
}
return peer;
}
void tsi_shallow_peer_destruct(tsi_peer *peer) {
if (peer->properties != NULL) gpr_free(peer->properties);
}
static void ssl_channel_check_call_host(grpc_exec_ctx *exec_ctx,
grpc_channel_security_connector *sc,
const char *host,
grpc_auth_context *auth_context,
grpc_security_call_host_check_cb cb,
void *user_data) {
grpc_ssl_channel_security_connector *c =
(grpc_ssl_channel_security_connector *)sc;
if (ssl_host_matches_name(&c->peer, host)) return GRPC_SECURITY_OK;
grpc_security_status status = GRPC_SECURITY_ERROR;
tsi_peer peer = tsi_shallow_peer_from_ssl_auth_context(auth_context);
if (ssl_host_matches_name(&peer, host)) status = GRPC_SECURITY_OK;
/* If the target name was overridden, then the original target_name was
'checked' transitively during the previous peer check at the end of the
handshake. */
if (c->overridden_target_name != NULL && strcmp(host, c->target_name) == 0) {
return GRPC_SECURITY_OK;
} else {
return GRPC_SECURITY_ERROR;
status = GRPC_SECURITY_OK;
}
cb(exec_ctx, user_data, status);
tsi_shallow_peer_destruct(&peer);
}
static grpc_security_connector_vtable ssl_channel_vtable = {

33
src/core/security/security_connector.h
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@ -42,7 +42,6 @@
typedef enum {
GRPC_SECURITY_OK = 0,
GRPC_SECURITY_PENDING,
GRPC_SECURITY_ERROR
} grpc_security_status;
@ -124,9 +123,8 @@ void grpc_security_connector_do_handshake(grpc_exec_ctx *exec_ctx,
grpc_security_handshake_done_cb cb,
void *user_data);
/* Check the peer.
Ownership of the peer is transfered.
TODO(jboeuf): Pass the peer by const pointer and do not pass ownership. */
/* Check the peer. Callee takes ownership of the peer object.
The callback will include the resulting auth_context. */
void grpc_security_connector_check_peer(grpc_exec_ctx *exec_ctx,
grpc_security_connector *sc,
tsi_peer peer,
@ -160,30 +158,24 @@ typedef void (*grpc_security_call_host_check_cb)(grpc_exec_ctx *exec_ctx,
struct grpc_channel_security_connector {
grpc_security_connector base; /* requires is_client_side to be non 0. */
grpc_call_credentials *request_metadata_creds;
grpc_security_status (*check_call_host)(grpc_exec_ctx *exec_ctx,
grpc_channel_security_connector *sc,
const char *host,
grpc_security_call_host_check_cb cb,
void *user_data);
void (*check_call_host)(grpc_exec_ctx *exec_ctx,
grpc_channel_security_connector *sc, const char *host,
grpc_auth_context *auth_context,
grpc_security_call_host_check_cb cb, void *user_data);
};
/* Checks that the host that will be set for a call is acceptable.
Implementations can choose do the check either synchronously or
asynchronously. In the first case, a successful call will return
GRPC_SECURITY_OK. In the asynchronous case, the call will return
GRPC_SECURITY_PENDING unless an error is detected early on.
TODO(jboeuf): add a grpc_auth_context param to test against. */
grpc_security_status grpc_channel_security_connector_check_call_host(
/* Checks that the host that will be set for a call is acceptable. */
void grpc_channel_security_connector_check_call_host(
grpc_exec_ctx *exec_ctx, grpc_channel_security_connector *sc,
const char *host, grpc_security_call_host_check_cb cb, void *user_data);
const char *host, grpc_auth_context *auth_context,
grpc_security_call_host_check_cb cb, void *user_data);
/* --- Creation security connectors. --- */
/* For TESTING ONLY!
Creates a fake connector that emulates real channel security. */
grpc_channel_security_connector *grpc_fake_channel_security_connector_create(
grpc_call_credentials *request_metadata_creds,
int call_host_check_is_async);
grpc_call_credentials *request_metadata_creds);
/* For TESTING ONLY!
Creates a fake connector that emulates real server security. */
@ -247,5 +239,8 @@ const tsi_peer_property *tsi_peer_get_property_by_name(const tsi_peer *peer,
/* Exposed for testing only. */
grpc_auth_context *tsi_ssl_peer_to_auth_context(const tsi_peer *peer);
tsi_peer tsi_shallow_peer_from_auth_context(
const grpc_auth_context *auth_context);
void tsi_shallow_peer_destruct(tsi_peer *peer);
#endif /* GRPC_INTERNAL_CORE_SECURITY_SECURITY_CONNECTOR_H */

2
test/core/security/security_connector_test.c
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@ -242,6 +242,8 @@ static void test_cn_and_multiple_sans_and_others_ssl_peer_to_auth_context(
GRPC_AUTH_CONTEXT_UNREF(ctx, "test");
}
/* TODO(jboeuf): Unit-test tsi_shallow_peer_from_auth_context. */
int main(int argc, char **argv) {
grpc_test_init(argc, argv);
grpc_init();

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