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-rw-r--r--src/include/ipxe/tls.h12
-rw-r--r--src/net/tls.c129
2 files changed, 122 insertions, 19 deletions
diff --git a/src/include/ipxe/tls.h b/src/include/ipxe/tls.h
index 0375a722..4bffde7c 100644
--- a/src/include/ipxe/tls.h
+++ b/src/include/ipxe/tls.h
@@ -63,6 +63,7 @@ struct tls_header {
#define TLS_HELLO_REQUEST 0
#define TLS_CLIENT_HELLO 1
#define TLS_SERVER_HELLO 2
+#define TLS_NEW_SESSION_TICKET 4
#define TLS_CERTIFICATE 11
#define TLS_SERVER_KEY_EXCHANGE 12
#define TLS_CERTIFICATE_REQUEST 13
@@ -108,6 +109,9 @@ struct tls_header {
/* TLS signature algorithms extension */
#define TLS_SIGNATURE_ALGORITHMS 13
+/* TLS session ticket extension */
+#define TLS_SESSION_TICKET 35
+
/* TLS renegotiation information extension */
#define TLS_RENEGOTIATION_INFO 0xff01
@@ -255,6 +259,10 @@ struct tls_session {
uint8_t id[32];
/** Length of session ID */
size_t id_len;
+ /** Session ticket */
+ void *ticket;
+ /** Length of session ticket */
+ size_t ticket_len;
/** Master secret */
uint8_t master_secret[48];
@@ -275,6 +283,10 @@ struct tls_connection {
uint8_t session_id[32];
/** Length of session ID */
size_t session_id_len;
+ /** New session ticket */
+ void *new_session_ticket;
+ /** Length of new session ticket */
+ size_t new_session_ticket_len;
/** Plaintext stream */
struct interface plainstream;
diff --git a/src/net/tls.c b/src/net/tls.c
index 43fe4b4d..1cd37e77 100644
--- a/src/net/tls.c
+++ b/src/net/tls.c
@@ -102,6 +102,10 @@ FILE_LICENCE ( GPL2_OR_LATER );
#define EINFO_EINVAL_MAC \
__einfo_uniqify ( EINFO_EINVAL, 0x0d, \
"Invalid MAC" )
+#define EINVAL_TICKET __einfo_error ( EINFO_EINVAL_TICKET )
+#define EINFO_EINVAL_TICKET \
+ __einfo_uniqify ( EINFO_EINVAL, 0x0e, \
+ "Invalid New Session Ticket record")
#define EIO_ALERT __einfo_error ( EINFO_EIO_ALERT )
#define EINFO_EIO_ALERT \
__einfo_uniqify ( EINFO_EIO, 0x01, \
@@ -326,6 +330,9 @@ static void free_tls_session ( struct refcnt *refcnt ) {
/* Remove from list of sessions */
list_del ( &session->list );
+ /* Free session ticket */
+ free ( session->ticket );
+
/* Free session */
free ( session );
}
@@ -343,6 +350,7 @@ static void free_tls ( struct refcnt *refcnt ) {
struct io_buffer *tmp;
/* Free dynamically-allocated resources */
+ free ( tls->new_session_ticket );
tls_clear_cipher ( tls, &tls->tx_cipherspec );
tls_clear_cipher ( tls, &tls->tx_cipherspec_pending );
tls_clear_cipher ( tls, &tls->rx_cipherspec );
@@ -1007,7 +1015,7 @@ static int tls_send_client_hello ( struct tls_connection *tls ) {
uint16_t version;
uint8_t random[32];
uint8_t session_id_len;
- uint8_t session_id[session->id_len];
+ uint8_t session_id[tls->session_id_len];
uint16_t cipher_suite_len;
uint16_t cipher_suites[TLS_NUM_CIPHER_SUITES];
uint8_t compression_methods_len;
@@ -1043,18 +1051,17 @@ static int tls_send_client_hello ( struct tls_connection *tls ) {
uint8_t data[ tls->secure_renegotiation ?
sizeof ( tls->verify.client ) :0];
} __attribute__ (( packed )) renegotiation_info;
+ uint16_t session_ticket_type;
+ uint16_t session_ticket_len;
+ struct {
+ uint8_t data[session->ticket_len];
+ } __attribute__ (( packed )) session_ticket;
} __attribute__ (( packed )) extensions;
} __attribute__ (( packed )) hello;
struct tls_cipher_suite *suite;
struct tls_signature_hash_algorithm *sighash;
unsigned int i;
- /* Record requested session ID and associated master secret */
- memcpy ( tls->session_id, session->id, sizeof ( tls->session_id ) );
- tls->session_id_len = session->id_len;
- memcpy ( tls->master_secret, session->master_secret,
- sizeof ( tls->master_secret ) );
-
/* Construct record */
memset ( &hello, 0, sizeof ( hello ) );
hello.type_length = ( cpu_to_le32 ( TLS_CLIENT_HELLO ) |
@@ -1102,6 +1109,11 @@ static int tls_send_client_hello ( struct tls_connection *tls ) {
= sizeof ( hello.extensions.renegotiation_info.data );
memcpy ( hello.extensions.renegotiation_info.data, tls->verify.client,
sizeof ( hello.extensions.renegotiation_info.data ) );
+ hello.extensions.session_ticket_type = htons ( TLS_SESSION_TICKET );
+ hello.extensions.session_ticket_len
+ = htons ( sizeof ( hello.extensions.session_ticket ) );
+ memcpy ( hello.extensions.session_ticket.data, session->ticket,
+ sizeof ( hello.extensions.session_ticket.data ) );
return tls_send_handshake ( tls, &hello, sizeof ( hello ) );
}
@@ -1632,6 +1644,57 @@ static int tls_new_server_hello ( struct tls_connection *tls,
}
/**
+ * Receive New Session Ticket handshake record
+ *
+ * @v tls TLS connection
+ * @v data Plaintext handshake record
+ * @v len Length of plaintext handshake record
+ * @ret rc Return status code
+ */
+static int tls_new_session_ticket ( struct tls_connection *tls,
+ const void *data, size_t len ) {
+ const struct {
+ uint32_t lifetime;
+ uint16_t len;
+ uint8_t ticket[0];
+ } __attribute__ (( packed )) *new_session_ticket = data;
+ size_t ticket_len;
+
+ /* Parse header */
+ if ( sizeof ( *new_session_ticket ) > len ) {
+ DBGC ( tls, "TLS %p received underlength New Session Ticket\n",
+ tls );
+ DBGC_HD ( tls, data, len );
+ return -EINVAL_TICKET;
+ }
+ ticket_len = ntohs ( new_session_ticket->len );
+ if ( ticket_len > ( len - sizeof ( *new_session_ticket ) ) ) {
+ DBGC ( tls, "TLS %p received overlength New Session Ticket\n",
+ tls );
+ DBGC_HD ( tls, data, len );
+ return -EINVAL_TICKET;
+ }
+
+ /* Free any unapplied new session ticket */
+ free ( tls->new_session_ticket );
+ tls->new_session_ticket = NULL;
+ tls->new_session_ticket_len = 0;
+
+ /* Record ticket */
+ tls->new_session_ticket = malloc ( ticket_len );
+ if ( ! tls->new_session_ticket )
+ return -ENOMEM;
+ memcpy ( tls->new_session_ticket, new_session_ticket->ticket,
+ ticket_len );
+ tls->new_session_ticket_len = ticket_len;
+ DBGC ( tls, "TLS %p new session ticket:\n", tls );
+ DBGC_HDA ( tls, 0, tls->new_session_ticket,
+ tls->new_session_ticket_len );
+
+ return 0;
+}
+
+/**
* Parse certificate chain
*
* @v tls TLS connection
@@ -1863,12 +1926,21 @@ static int tls_new_finished ( struct tls_connection *tls,
tls_tx_resume ( tls );
}
- /* Record session ID and master secret, if applicable */
+ /* Record session ID, ticket, and master secret, if applicable */
+ if ( tls->session_id_len || tls->new_session_ticket_len ) {
+ memcpy ( session->master_secret, tls->master_secret,
+ sizeof ( session->master_secret ) );
+ }
if ( tls->session_id_len ) {
session->id_len = tls->session_id_len;
memcpy ( session->id, tls->session_id, sizeof ( session->id ) );
- memcpy ( session->master_secret, tls->master_secret,
- sizeof ( session->master_secret ) );
+ }
+ if ( tls->new_session_ticket_len ) {
+ free ( session->ticket );
+ session->ticket = tls->new_session_ticket;
+ session->ticket_len = tls->new_session_ticket_len;
+ tls->new_session_ticket = NULL;
+ tls->new_session_ticket_len = 0;
}
/* Move to end of session's connection list and allow other
@@ -1933,6 +2005,10 @@ static int tls_new_handshake ( struct tls_connection *tls,
case TLS_SERVER_HELLO:
rc = tls_new_server_hello ( tls, payload, payload_len );
break;
+ case TLS_NEW_SESSION_TICKET:
+ rc = tls_new_session_ticket ( tls, payload,
+ payload_len );
+ break;
case TLS_CERTIFICATE:
rc = tls_new_certificate ( tls, payload, payload_len );
break;
@@ -2804,16 +2880,31 @@ static void tls_tx_step ( struct tls_connection *tls ) {
/* Send first pending transmission */
if ( tls->tx_pending & TLS_TX_CLIENT_HELLO ) {
- /* Wait for session ID to become available unless we
- * are the lead connection within the session.
+ /* Serialise server negotiations within a session, to
+ * provide a consistent view of session IDs and
+ * session tickets.
*/
- if ( session->id_len == 0 ) {
- list_for_each_entry ( conn, &session->conn, list ) {
- if ( conn == tls )
- break;
- if ( is_pending ( &conn->server_negotiation ) )
- return;
- }
+ list_for_each_entry ( conn, &session->conn, list ) {
+ if ( conn == tls )
+ break;
+ if ( is_pending ( &conn->server_negotiation ) )
+ return;
+ }
+ /* Record or generate session ID and associated master secret */
+ if ( session->id_len ) {
+ /* Attempt to resume an existing session */
+ memcpy ( tls->session_id, session->id,
+ sizeof ( tls->session_id ) );
+ tls->session_id_len = session->id_len;
+ memcpy ( tls->master_secret, session->master_secret,
+ sizeof ( tls->master_secret ) );
+ } else {
+ /* No existing session: use a random session ID */
+ assert ( sizeof ( tls->session_id ) ==
+ sizeof ( tls->client_random ) );
+ memcpy ( tls->session_id, &tls->client_random,
+ sizeof ( tls->session_id ) );
+ tls->session_id_len = sizeof ( tls->session_id );
}
/* Send Client Hello */
if ( ( rc = tls_send_client_hello ( tls ) ) != 0 ) {
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-11-21 13:34:57 +0100