Amazing-Mirror/fragattacks
1
0
Fork 0
mirror of https://github.com/vanhoefm/fragattacks.git synced 2024-11-28 18:28:23 -05:00
Code Issues Projects Releases Wiki Activity

Modified the OpenSSL patch to use session ticket -specific function

Browse Source 
This is the first step in replacing SSL_set_hello_extension() with a new
SSL_set_session_ticket_ext() function that can only be used to override the
session ticket extension, not any arbitrary TLS extension.

SSL_set_hello_extension() is still present as a simple wrapper in this
version to avoid changing the API and to make testing with wpa_supplicant
and hostapd easier. It can be eventually removed when the patch is going in
into OpenSSL distribution.
This commit is contained in:
Jouni Malinen 2008-11-12 06:15:27 +02:00
parent d13c05cafb
commit 1b554eb0d7
1 changed files with 51 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
patches/openssl-0.9.9-session-ticket.patch
View File

@ -144,7 +144,7 @@ Index: openssl-SNAP-20081111/ssl/ssl_err.c
{ERR_FUNC(SSL_F_TLS1_PRF), "tls1_prf"},
{ERR_FUNC(SSL_F_TLS1_SETUP_KEY_BLOCK), "TLS1_SETUP_KEY_BLOCK"},
{ERR_FUNC(SSL_F_WRITE_PENDING), "WRITE_PENDING"},
+{ERR_FUNC(SSL_F_SSL_SET_HELLO_EXTENSION), "SSL_set_hello_extension"},
+{ERR_FUNC(SSL_F_SSL_SET_SESSION_TICKET_EXT), "SSL_set_session_ticket_ext"},
{0,NULL}
};
@ -156,7 +156,7 @@ Index: openssl-SNAP-20081111/ssl/ssl.h
* 'struct ssl_st *' function parameters used to prototype callbacks
* in SSL_CTX. */
typedef struct ssl_st *ssl_crock_st;
+typedef struct tls_extension_st TLS_EXTENSION;
+typedef struct tls_session_ticket_ext_st TLS_SESSION_TICKET_EXT;
/* used to hold info on the particular ciphers used */
typedef struct ssl_cipher_st
@ -173,8 +173,8 @@ Index: openssl-SNAP-20081111/ssl/ssl.h
void *tlsext_opaque_prf_input;
size_t tlsext_opaque_prf_input_len;
+ /* TLS extensions */
+ TLS_EXTENSION *tls_extension;
+ /* TLS Session Ticket extension override */
+ TLS_SESSION_TICKET_EXT *tlsext_session_ticket;
+
+ /* TLS pre-shared secret session resumption */
+ tls_session_secret_cb_fn tls_session_secret_cb;
@ -183,24 +183,28 @@ Index: openssl-SNAP-20081111/ssl/ssl.h
SSL_CTX * initial_ctx; /* initial ctx, used to store sessions */
#define session_ctx initial_ctx
#else
@@ -1746,6 +1756,12 @@ void *SSL_COMP_get_compression_methods(v
@@ -1746,6 +1756,16 @@ void *SSL_COMP_get_compression_methods(v
int SSL_COMP_add_compression_method(int id,void *cm);
#endif
+/* TLS extensions functions */
+/* NOTE: This function will be removed; it is only here for backwards
+ * compatibility for the API during testing. */
+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len);
+
+/* TLS extensions functions */
+int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len);
+
+/* Pre-shared secret session resumption functions */
+int SSL_set_session_secret_cb(SSL *s, tls_session_secret_cb_fn tls_session_secret_cb, void *arg);
+
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
* made after this point may be overwritten when the script is next run.
@@ -1948,6 +1964,7 @@ void ERR_load_SSL_strings(void);
@@ -1948,6 +1968,7 @@ void ERR_load_SSL_strings(void);
#define SSL_F_TLS1_PRF 284
#define SSL_F_TLS1_SETUP_KEY_BLOCK 211
#define SSL_F_WRITE_PENDING 212
+#define SSL_F_SSL_SET_HELLO_EXTENSION 213
+#define SSL_F_SSL_SET_SESSION_TICKET_EXT 213
/* Reason codes. */
#define SSL_R_APP_DATA_IN_HANDSHAKE 100
@ -208,7 +212,7 @@ Index: openssl-SNAP-20081111/ssl/ssl_sess.c
===================================================================
--- openssl-SNAP-20081111.orig/ssl/ssl_sess.c
+++ openssl-SNAP-20081111/ssl/ssl_sess.c
@@ -834,6 +834,54 @@ long SSL_CTX_get_timeout(const SSL_CTX *
@@ -834,6 +834,62 @@ long SSL_CTX_get_timeout(const SSL_CTX *
return(s->session_timeout);
}
@ -222,35 +226,33 @@ Index: openssl-SNAP-20081111/ssl/ssl_sess.c
+ return(1);
+ }
+
+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len)
+int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len)
+ {
+ if (s->version >= TLS1_VERSION)
+ {
+ if (s->tls_extension)
+ if (s->tlsext_session_ticket)
+ {
+ OPENSSL_free(s->tls_extension);
+ s->tls_extension = NULL;
+ OPENSSL_free(s->tlsext_session_ticket);
+ s->tlsext_session_ticket = NULL;
+ }
+
+ s->tls_extension = OPENSSL_malloc(sizeof(TLS_EXTENSION) + ext_len);
+ if (!s->tls_extension)
+ s->tlsext_session_ticket = OPENSSL_malloc(sizeof(TLS_SESSION_TICKET_EXT) + ext_len);
+ if (!s->tlsext_session_ticket)
+ {
+ SSLerr(SSL_F_SSL_SET_HELLO_EXTENSION, ERR_R_MALLOC_FAILURE);
+ SSLerr(SSL_F_SSL_SET_SESSION_TICKET_EXT, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ s->tls_extension->type = ext_type;
+
+ if (ext_data)
+ {
+ s->tls_extension->length = ext_len;
+ s->tls_extension->data = s->tls_extension + 1;
+ memcpy(s->tls_extension->data, ext_data, ext_len);
+ s->tlsext_session_ticket->length = ext_len;
+ s->tlsext_session_ticket->data = s->tlsext_session_ticket + 1;
+ memcpy(s->tlsext_session_ticket->data, ext_data, ext_len);
+ }
+ else
+ {
+ s->tls_extension->length = 0;
+ s->tls_extension->data = NULL;
+ s->tlsext_session_ticket->length = 0;
+ s->tlsext_session_ticket->data = NULL;
+ }
+
+ return 1;
@ -258,6 +260,16 @@ Index: openssl-SNAP-20081111/ssl/ssl_sess.c
+
+ return 0;
+ }
+
+/* NOTE: This function will be removed; it is only here for backwards
+ * compatibility for the API during testing. */
+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len)
+ {
+ if (ext_type != TLSEXT_TYPE_session_ticket)
+ return 0;
+
+ return SSL_set_session_ticket_ext(s, ext_data, ext_len);
+ }
+#endif /* OPENSSL_NO_TLSEXT */
+
typedef struct timeout_param_st
@ -272,40 +284,39 @@ Index: openssl-SNAP-20081111/ssl/t1_lib.c
void tls1_free(SSL *s)
{
+#ifndef OPENSSL_NO_TLSEXT
+ if (s->tls_extension)
+ if (s->tlsext_session_ticket)
+ {
+ OPENSSL_free(s->tls_extension);
+ OPENSSL_free(s->tlsext_session_ticket);
+ }
+#endif /* OPENSSL_NO_TLSEXT */
ssl3_free(s);
}
@@ -357,8 +363,24 @@ unsigned char *ssl_add_clienthello_tlsex
@@ -357,8 +363,23 @@ unsigned char *ssl_add_clienthello_tlsex
int ticklen;
if (s->session && s->session->tlsext_tick)
ticklen = s->session->tlsext_ticklen;
+ else if (s->session && s->tls_extension &&
+ s->tls_extension->type == TLSEXT_TYPE_session_ticket &&
+ s->tls_extension->data)
+ else if (s->session && s->tlsext_session_ticket &&
+ s->tlsext_session_ticket->data)
+ {
+ ticklen = s->tls_extension->length;
+ ticklen = s->tlsext_session_ticket->length;
+ s->session->tlsext_tick = OPENSSL_malloc(ticklen);
+ if (!s->session->tlsext_tick)
+ return NULL;
+ memcpy(s->session->tlsext_tick, s->tls_extension->data,
+ memcpy(s->session->tlsext_tick,
+ s->tlsext_session_ticket->data,
+ ticklen);
+ s->session->tlsext_ticklen = ticklen;
+ }
else
ticklen = 0;
+ if (ticklen == 0 && s->tls_extension &&
+ s->tls_extension->type == TLSEXT_TYPE_session_ticket &&
+ s->tls_extension->data == NULL)
+ if (ticklen == 0 && s->tlsext_session_ticket &&
+ s->tlsext_session_ticket->data == NULL)
+ goto skip_ext;
/* Check for enough room 2 for extension type, 2 for len
* rest for ticket
*/
@@ -371,6 +393,7 @@ unsigned char *ssl_add_clienthello_tlsex
@@ -371,6 +392,7 @@ unsigned char *ssl_add_clienthello_tlsex
ret += ticklen;
}
}
@ -313,7 +324,7 @@ Index: openssl-SNAP-20081111/ssl/t1_lib.c
#ifdef TLSEXT_TYPE_opaque_prf_input
if (s->s3->client_opaque_prf_input != NULL)
@@ -1435,6 +1458,15 @@ int tls1_process_ticket(SSL *s, unsigned
@@ -1435,6 +1457,15 @@ int tls1_process_ticket(SSL *s, unsigned
s->tlsext_ticket_expected = 1;
return 0; /* Cache miss */
}
@ -333,14 +344,13 @@ Index: openssl-SNAP-20081111/ssl/tls1.h
===================================================================
--- openssl-SNAP-20081111.orig/ssl/tls1.h
+++ openssl-SNAP-20081111/ssl/tls1.h
@@ -512,6 +512,14 @@ SSL_CTX_callback_ctrl(ssl,SSL_CTRL_SET_T
@@ -512,6 +512,13 @@ SSL_CTX_callback_ctrl(ssl,SSL_CTRL_SET_T
#define TLS_MD_MASTER_SECRET_CONST "\x6d\x61\x73\x74\x65\x72\x20\x73\x65\x63\x72\x65\x74" /*master secret*/
#endif
+/* TLS extension struct */
+struct tls_extension_st
+/* TLS Session Ticket extension struct */
+struct tls_session_ticket_ext_st
+ {
+ unsigned short type;
+ unsigned short length;
+ void *data;
+ };
@ -356,5 +366,5 @@ Index: openssl-SNAP-20081111/util/ssleay.num
SSL_CTX_set_psk_server_callback 303 EXIST::FUNCTION:PSK
SSL_get_psk_identity 304 EXIST::FUNCTION:PSK
PEM_write_SSL_SESSION 305 EXIST:!WIN16:FUNCTION:
+SSL_set_hello_extension 306 EXIST::FUNCTION:TLSEXT
+SSL_set_session_ticket_ext 306 EXIST::FUNCTION:TLSEXT
+SSL_set_session_secret_cb 307 EXIST::FUNCTION:TLSEXT