430 lines
15 KiB
Diff
430 lines
15 KiB
Diff
This patch is adding support for TLS hello extensions and externally
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generated pre-shared key material to OpenSSL 0.9.8. This is
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based on the patch from Alexey Kobozev <akobozev@cisco.com>
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(sent to openssl-dev mailing list on Tue, 07 Jun 2005 15:40:58 +0300).
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diff -uprN openssl-0.9.8.orig/include/openssl/ssl.h openssl-0.9.8/include/openssl/ssl.h
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--- openssl-0.9.8.orig/include/openssl/ssl.h 2005-06-10 12:51:16.000000000 -0700
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+++ openssl-0.9.8/include/openssl/ssl.h 2005-07-19 20:02:15.000000000 -0700
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@@ -340,6 +340,7 @@ extern "C" {
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* 'struct ssl_st *' function parameters used to prototype callbacks
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* in SSL_CTX. */
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typedef struct ssl_st *ssl_crock_st;
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+typedef struct tls_extension_st TLS_EXTENSION;
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/* used to hold info on the particular ciphers used */
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typedef struct ssl_cipher_st
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@@ -361,6 +362,8 @@ DECLARE_STACK_OF(SSL_CIPHER)
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typedef struct ssl_st SSL;
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typedef struct ssl_ctx_st SSL_CTX;
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+typedef int (*tls_session_secret_cb_fn)(SSL *s, void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg);
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+
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/* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
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typedef struct ssl_method_st
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{
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@@ -968,6 +971,15 @@ struct ssl_st
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int first_packet;
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int client_version; /* what was passed, used for
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* SSLv3/TLS rollback check */
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+
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+ /* TLS externsions */
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+ TLS_EXTENSION *tls_extension;
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+ int (*tls_extension_cb)(SSL *s, TLS_EXTENSION *tls_ext, void *arg);
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+ void *tls_extension_cb_arg;
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+
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+ /* TLS pre-shared secret session resumption */
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+ tls_session_secret_cb_fn tls_session_secret_cb;
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+ void *tls_session_secret_cb_arg;
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};
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#ifdef __cplusplus
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@@ -1533,6 +1545,13 @@ void *SSL_COMP_get_compression_methods(v
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int SSL_COMP_add_compression_method(int id,void *cm);
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#endif
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+/* TLS extensions functions */
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+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len);
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+int SSL_set_hello_extension_cb(SSL *s, int (*cb)(SSL *, TLS_EXTENSION *, void *), void *arg);
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+
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+/* Pre-shared secret session resumption functions */
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+int SSL_set_session_secret_cb(SSL *s, tls_session_secret_cb_fn tls_session_secret_cb, void *arg);
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+
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/* BEGIN ERROR CODES */
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/* The following lines are auto generated by the script mkerr.pl. Any changes
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* made after this point may be overwritten when the script is next run.
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@@ -1714,6 +1733,7 @@ void ERR_load_SSL_strings(void);
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#define SSL_F_TLS1_ENC 210
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#define SSL_F_TLS1_SETUP_KEY_BLOCK 211
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#define SSL_F_WRITE_PENDING 212
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+#define SSL_F_SSL_SET_HELLO_EXTENSION 213
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/* Reason codes. */
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#define SSL_R_APP_DATA_IN_HANDSHAKE 100
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diff -uprN openssl-0.9.8.orig/include/openssl/tls1.h openssl-0.9.8/include/openssl/tls1.h
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--- openssl-0.9.8.orig/include/openssl/tls1.h 2003-07-22 05:34:21.000000000 -0700
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+++ openssl-0.9.8/include/openssl/tls1.h 2005-07-19 20:02:15.000000000 -0700
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@@ -282,6 +282,14 @@ extern "C" {
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#define TLS_MD_MASTER_SECRET_CONST "\x6d\x61\x73\x74\x65\x72\x20\x73\x65\x63\x72\x65\x74" /*master secret*/
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#endif
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+/* TLS extension struct */
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+struct tls_extension_st
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+{
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+ unsigned short type;
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+ unsigned short length;
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+ void *data;
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+};
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+
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#ifdef __cplusplus
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}
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#endif
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diff -uprN openssl-0.9.8.orig/ssl/Makefile openssl-0.9.8/ssl/Makefile
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--- openssl-0.9.8.orig/ssl/Makefile 2005-05-30 16:20:30.000000000 -0700
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+++ openssl-0.9.8/ssl/Makefile 2005-07-19 20:02:15.000000000 -0700
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@@ -24,7 +24,7 @@ LIBSRC= \
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s2_meth.c s2_srvr.c s2_clnt.c s2_lib.c s2_enc.c s2_pkt.c \
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s3_meth.c s3_srvr.c s3_clnt.c s3_lib.c s3_enc.c s3_pkt.c s3_both.c \
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s23_meth.c s23_srvr.c s23_clnt.c s23_lib.c s23_pkt.c \
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- t1_meth.c t1_srvr.c t1_clnt.c t1_lib.c t1_enc.c \
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+ t1_meth.c t1_srvr.c t1_clnt.c t1_lib.c t1_enc.c t1_ext.c \
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d1_meth.c d1_srvr.c d1_clnt.c d1_lib.c d1_pkt.c \
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d1_both.c d1_enc.c \
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ssl_lib.c ssl_err2.c ssl_cert.c ssl_sess.c \
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@@ -35,7 +35,7 @@ LIBOBJ= \
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s2_meth.o s2_srvr.o s2_clnt.o s2_lib.o s2_enc.o s2_pkt.o \
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s3_meth.o s3_srvr.o s3_clnt.o s3_lib.o s3_enc.o s3_pkt.o s3_both.o \
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s23_meth.o s23_srvr.o s23_clnt.o s23_lib.o s23_pkt.o \
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- t1_meth.o t1_srvr.o t1_clnt.o t1_lib.o t1_enc.o \
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+ t1_meth.o t1_srvr.o t1_clnt.o t1_lib.o t1_enc.o t1_ext.o \
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d1_meth.o d1_srvr.o d1_clnt.o d1_lib.o d1_pkt.o \
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d1_both.o d1_enc.o \
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ssl_lib.o ssl_err2.o ssl_cert.o ssl_sess.o \
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@@ -968,3 +968,4 @@ t1_srvr.o: ../include/openssl/ssl23.h ..
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t1_srvr.o: ../include/openssl/stack.h ../include/openssl/symhacks.h
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t1_srvr.o: ../include/openssl/tls1.h ../include/openssl/x509.h
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t1_srvr.o: ../include/openssl/x509_vfy.h ssl_locl.h t1_srvr.c
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+t1_ext.o: t1_ext.c ssl_locl.h
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diff -uprN openssl-0.9.8.orig/ssl/s3_clnt.c openssl-0.9.8/ssl/s3_clnt.c
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--- openssl-0.9.8.orig/ssl/s3_clnt.c 2005-05-16 03:11:03.000000000 -0700
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+++ openssl-0.9.8/ssl/s3_clnt.c 2005-07-19 20:02:15.000000000 -0700
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@@ -606,6 +606,20 @@ int ssl3_client_hello(SSL *s)
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}
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*(p++)=0; /* Add the NULL method */
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+ /* send client hello extensions if any */
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+ if (s->version >= TLS1_VERSION && s->tls_extension)
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+ {
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+ // set the total extensions length
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+ s2n(s->tls_extension->length + 4, p);
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+
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+ // put the extensions with type and length
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+ s2n(s->tls_extension->type, p);
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+ s2n(s->tls_extension->length, p);
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+
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+ memcpy(p, s->tls_extension->data, s->tls_extension->length);
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+ p+=s->tls_extension->length;
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+ }
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+
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l=(p-d);
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d=buf;
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*(d++)=SSL3_MT_CLIENT_HELLO;
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@@ -628,7 +642,7 @@ int ssl3_get_server_hello(SSL *s)
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STACK_OF(SSL_CIPHER) *sk;
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SSL_CIPHER *c;
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unsigned char *p,*d;
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- int i,al,ok;
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+ int i,al,ok,pre_shared;
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unsigned int j;
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long n;
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SSL_COMP *comp;
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@@ -693,7 +707,24 @@ int ssl3_get_server_hello(SSL *s)
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goto f_err;
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}
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- if (j != 0 && j == s->session->session_id_length
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+ /* check if we want to resume the session based on external pre-shared secret */
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+ pre_shared = 0;
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+ if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
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+ {
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+ SSL_CIPHER *pref_cipher=NULL;
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+ s->session->master_key_length=sizeof(s->session->master_key);
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+ if (s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length,
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+ NULL, &pref_cipher, s->tls_session_secret_cb_arg))
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+ {
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+ s->hit=1;
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+ s->session->cipher=pref_cipher ? pref_cipher : ssl_get_cipher_by_char(s,p+j);
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+ s->session->session_id_length = j;
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+ memcpy(s->session->session_id, p, j);
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+ pre_shared = 1;
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+ }
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+ }
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+
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+ if ((pre_shared || j != 0) && j == s->session->session_id_length
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&& memcmp(p,s->session->session_id,j) == 0)
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{
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if(s->sid_ctx_length != s->session->sid_ctx_length
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diff -uprN openssl-0.9.8.orig/ssl/s3_srvr.c openssl-0.9.8/ssl/s3_srvr.c
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--- openssl-0.9.8.orig/ssl/s3_srvr.c 2005-05-22 17:32:55.000000000 -0700
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+++ openssl-0.9.8/ssl/s3_srvr.c 2005-07-19 20:02:15.000000000 -0700
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@@ -955,6 +955,75 @@ int ssl3_get_client_hello(SSL *s)
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}
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#endif
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+ /* Check for TLS client hello extension here */
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+ if (p < (d+n) && s->version >= TLS1_VERSION)
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+ {
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+ if (s->tls_extension_cb)
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+ {
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+ TLS_EXTENSION tls_ext;
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+ unsigned short ext_total_len;
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+
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+ n2s(p, ext_total_len);
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+ n2s(p, tls_ext.type);
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+ n2s(p, tls_ext.length);
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+
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+ // sanity check in TLS extension len
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+ if (tls_ext.length > (d+n) - p)
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+ {
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+ // just cut the lenth to packet border
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+ tls_ext.length = (d+n) - p;
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+ }
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+
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+ tls_ext.data = p;
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+
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+ // returns an alert code or 0
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+ al = s->tls_extension_cb(s, &tls_ext, s->tls_extension_cb_arg);
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+ if (al != 0)
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+ {
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+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
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+ goto f_err;
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+ }
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+ }
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+ }
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+
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+ /* Check if we want to use external pre-shared secret for this handshake */
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+ /* for not reused session only */
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+ if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb)
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+ {
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+ SSL_CIPHER *pref_cipher=NULL;
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+
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+ s->session->master_key_length=sizeof(s->session->master_key);
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+ if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length,
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+ ciphers, &pref_cipher, s->tls_session_secret_cb_arg))
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+ {
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+ s->hit=1;
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+ s->session->ciphers=ciphers;
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+ s->session->verify_result=X509_V_OK;
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+
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+ ciphers=NULL;
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+
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+ /* check if some cipher was preferred by call back */
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+ pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s));
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+ if (pref_cipher == NULL)
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+ {
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+ al=SSL_AD_HANDSHAKE_FAILURE;
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+ SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER);
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+ goto f_err;
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+ }
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+
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+ s->session->cipher=pref_cipher;
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+
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+ if (s->cipher_list)
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+ sk_SSL_CIPHER_free(s->cipher_list);
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+
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+ if (s->cipher_list_by_id)
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+ sk_SSL_CIPHER_free(s->cipher_list_by_id);
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+
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+ s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers);
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+ s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers);
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+ }
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+ }
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+
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/* Given s->session->ciphers and SSL_get_ciphers, we must
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* pick a cipher */
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diff -uprN openssl-0.9.8.orig/ssl/ssl_err.c openssl-0.9.8/ssl/ssl_err.c
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--- openssl-0.9.8.orig/ssl/ssl_err.c 2005-06-10 12:51:16.000000000 -0700
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+++ openssl-0.9.8/ssl/ssl_err.c 2005-07-19 20:02:15.000000000 -0700
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@@ -242,6 +242,7 @@ static ERR_STRING_DATA SSL_str_functs[]=
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{ERR_FUNC(SSL_F_TLS1_ENC), "TLS1_ENC"},
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{ERR_FUNC(SSL_F_TLS1_SETUP_KEY_BLOCK), "TLS1_SETUP_KEY_BLOCK"},
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{ERR_FUNC(SSL_F_WRITE_PENDING), "WRITE_PENDING"},
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+{ERR_FUNC(SSL_F_SSL_SET_HELLO_EXTENSION), "SSL_set_hello_extension"},
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{0,NULL}
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};
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diff -uprN openssl-0.9.8.orig/ssl/ssl.h openssl-0.9.8/ssl/ssl.h
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--- openssl-0.9.8.orig/ssl/ssl.h 2005-06-10 12:51:16.000000000 -0700
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+++ openssl-0.9.8/ssl/ssl.h 2005-07-19 20:02:15.000000000 -0700
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@@ -340,6 +340,7 @@ extern "C" {
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* 'struct ssl_st *' function parameters used to prototype callbacks
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* in SSL_CTX. */
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typedef struct ssl_st *ssl_crock_st;
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+typedef struct tls_extension_st TLS_EXTENSION;
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/* used to hold info on the particular ciphers used */
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typedef struct ssl_cipher_st
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@@ -361,6 +362,8 @@ DECLARE_STACK_OF(SSL_CIPHER)
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typedef struct ssl_st SSL;
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typedef struct ssl_ctx_st SSL_CTX;
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+typedef int (*tls_session_secret_cb_fn)(SSL *s, void *secret, int *secret_len, STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg);
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+
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/* Used to hold functions for SSLv2 or SSLv3/TLSv1 functions */
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typedef struct ssl_method_st
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{
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@@ -968,6 +971,15 @@ struct ssl_st
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int first_packet;
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int client_version; /* what was passed, used for
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* SSLv3/TLS rollback check */
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+
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+ /* TLS externsions */
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+ TLS_EXTENSION *tls_extension;
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+ int (*tls_extension_cb)(SSL *s, TLS_EXTENSION *tls_ext, void *arg);
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+ void *tls_extension_cb_arg;
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+
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+ /* TLS pre-shared secret session resumption */
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+ tls_session_secret_cb_fn tls_session_secret_cb;
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+ void *tls_session_secret_cb_arg;
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};
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#ifdef __cplusplus
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@@ -1533,6 +1545,13 @@ void *SSL_COMP_get_compression_methods(v
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int SSL_COMP_add_compression_method(int id,void *cm);
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#endif
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+/* TLS extensions functions */
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+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len);
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+int SSL_set_hello_extension_cb(SSL *s, int (*cb)(SSL *, TLS_EXTENSION *, void *), void *arg);
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+
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+/* Pre-shared secret session resumption functions */
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+int SSL_set_session_secret_cb(SSL *s, tls_session_secret_cb_fn tls_session_secret_cb, void *arg);
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+
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/* BEGIN ERROR CODES */
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/* The following lines are auto generated by the script mkerr.pl. Any changes
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* made after this point may be overwritten when the script is next run.
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@@ -1714,6 +1733,7 @@ void ERR_load_SSL_strings(void);
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#define SSL_F_TLS1_ENC 210
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#define SSL_F_TLS1_SETUP_KEY_BLOCK 211
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#define SSL_F_WRITE_PENDING 212
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+#define SSL_F_SSL_SET_HELLO_EXTENSION 213
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/* Reason codes. */
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#define SSL_R_APP_DATA_IN_HANDSHAKE 100
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diff -uprN openssl-0.9.8.orig/ssl/ssl_sess.c openssl-0.9.8/ssl/ssl_sess.c
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--- openssl-0.9.8.orig/ssl/ssl_sess.c 2005-04-29 13:10:06.000000000 -0700
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+++ openssl-0.9.8/ssl/ssl_sess.c 2005-07-19 20:02:15.000000000 -0700
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@@ -656,6 +656,15 @@ long SSL_CTX_get_timeout(const SSL_CTX *
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return(s->session_timeout);
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}
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+int SSL_set_session_secret_cb(SSL *s, int (*tls_session_secret_cb)(SSL *s, void *secret, int *secret_len,
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+ STACK_OF(SSL_CIPHER) *peer_ciphers, SSL_CIPHER **cipher, void *arg), void *arg)
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+{
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+ if (s == NULL) return(0);
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+ s->tls_session_secret_cb = tls_session_secret_cb;
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+ s->tls_session_secret_cb_arg = arg;
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+ return(1);
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+}
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+
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typedef struct timeout_param_st
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{
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SSL_CTX *ctx;
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diff -uprN openssl-0.9.8.orig/ssl/t1_ext.c openssl-0.9.8/ssl/t1_ext.c
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--- openssl-0.9.8.orig/ssl/t1_ext.c 1969-12-31 16:00:00.000000000 -0800
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+++ openssl-0.9.8/ssl/t1_ext.c 2005-07-19 20:03:29.000000000 -0700
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@@ -0,0 +1,48 @@
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+
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+#include <stdio.h>
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+#include "ssl_locl.h"
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+
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+
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+int SSL_set_hello_extension(SSL *s, int ext_type, void *ext_data, int ext_len)
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+{
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+ if(s->version >= TLS1_VERSION)
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+ {
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+ if(s->tls_extension)
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+ {
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+ OPENSSL_free(s->tls_extension);
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+ s->tls_extension = NULL;
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+ }
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+
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+ if(ext_data)
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+ {
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+ s->tls_extension = OPENSSL_malloc(sizeof(TLS_EXTENSION) + ext_len);
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+ if(!s->tls_extension)
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+ {
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+ SSLerr(SSL_F_SSL_SET_HELLO_EXTENSION, ERR_R_MALLOC_FAILURE);
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+ return 0;
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+ }
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+
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+ s->tls_extension->type = ext_type;
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+ s->tls_extension->length = ext_len;
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+ s->tls_extension->data = s->tls_extension + 1;
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+ memcpy(s->tls_extension->data, ext_data, ext_len);
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+ }
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+
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+ return 1;
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+ }
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+
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+ return 0;
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+}
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+
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+int SSL_set_hello_extension_cb(SSL *s, int (*cb)(SSL *, TLS_EXTENSION *, void *), void *arg)
|
|
+{
|
|
+ if(s->version >= TLS1_VERSION)
|
|
+ {
|
|
+ s->tls_extension_cb = cb;
|
|
+ s->tls_extension_cb_arg = arg;
|
|
+
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
diff -uprN openssl-0.9.8.orig/ssl/t1_lib.c openssl-0.9.8/ssl/t1_lib.c
|
|
--- openssl-0.9.8.orig/ssl/t1_lib.c 2005-04-26 09:02:40.000000000 -0700
|
|
+++ openssl-0.9.8/ssl/t1_lib.c 2005-07-19 20:02:15.000000000 -0700
|
|
@@ -131,6 +131,10 @@ int tls1_new(SSL *s)
|
|
|
|
void tls1_free(SSL *s)
|
|
{
|
|
+ if(s->tls_extension)
|
|
+ {
|
|
+ OPENSSL_free(s->tls_extension);
|
|
+ }
|
|
ssl3_free(s);
|
|
}
|
|
|
|
diff -uprN openssl-0.9.8.orig/ssl/tls1.h openssl-0.9.8/ssl/tls1.h
|
|
--- openssl-0.9.8.orig/ssl/tls1.h 2003-07-22 05:34:21.000000000 -0700
|
|
+++ openssl-0.9.8/ssl/tls1.h 2005-07-19 20:02:15.000000000 -0700
|
|
@@ -282,6 +282,14 @@ extern "C" {
|
|
#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
|
|
+{
|
|
+ unsigned short type;
|
|
+ unsigned short length;
|
|
+ void *data;
|
|
+};
|
|
+
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
diff -uprN openssl-0.9.8.orig/util/ssleay.num openssl-0.9.8/util/ssleay.num
|
|
--- openssl-0.9.8.orig/util/ssleay.num 2005-05-08 17:22:02.000000000 -0700
|
|
+++ openssl-0.9.8/util/ssleay.num 2005-07-19 20:02:15.000000000 -0700
|
|
@@ -226,3 +226,6 @@ DTLSv1_server_method
|
|
SSL_COMP_get_compression_methods 276 EXIST:!VMS:FUNCTION:COMP
|
|
SSL_COMP_get_compress_methods 276 EXIST:VMS:FUNCTION:COMP
|
|
SSL_SESSION_get_id 277 EXIST::FUNCTION:
|
|
+SSL_set_hello_extension 278 EXIST::FUNCTION:
|
|
+SSL_set_hello_extension_cb 279 EXIST::FUNCTION:
|
|
+SSL_set_session_secret_cb 280 EXIST::FUNCTION:
|