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PR: 1833

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Submitted By: Robin Seggelmann <seggelmann@fh-muenster.de>

Support for abbreviated handshakes when renegotiating.
This commit is contained in:
Dr. Stephen Henson 2010-08-26 14:23:52 +00:00
parent c94f7f657b
commit 44959ee456
10 changed files with 48 additions and 21 deletions
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4
CHANGES
View file

@ -107,6 +107,10 @@
Changes between 1.0.0a and 1.0.1 [xx XXX xxxx]
*) Permit abbreviated handshakes when renegotiating using the function
SSL_renegotiate_abbreviated().
[Robin Seggelmann <seggelmann@fh-muenster.de>]
*) Add call to ENGINE_register_all_complete() to
ENGINE_load_builtin_engines(), so some implementations get used
automatically instead of needing explicit application support.

3
ssl/d1_clnt.c
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@ -171,7 +171,7 @@ int dtls1_connect(SSL *s)
switch(s->state)
{
case SSL_ST_RENEGOTIATE:
s->new_session=1;
s->renegotiate=1;
s->state=SSL_ST_CONNECT;
s->ctx->stats.sess_connect_renegotiate++;
/* break */
@ -539,6 +539,7 @@ int dtls1_connect(SSL *s)
/* else do it later in ssl3_write */
s->init_num=0;
s->renegotiate=0;
s->new_session=0;
ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

2
ssl/d1_pkt.c
View file

@ -957,6 +957,7 @@ start:
!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
!s->s3->renegotiate)
{
s->new_session = 1;
ssl3_renegotiate(s);
if (ssl3_renegotiate_check(s))
{
@ -1163,6 +1164,7 @@ start:
#else
s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
#endif
s->renegotiate=1;
s->new_session=1;
}
i=s->handshake_func(s);

7
ssl/d1_srvr.c
View file

@ -177,7 +177,7 @@ int dtls1_accept(SSL *s)
switch (s->state)
{
case SSL_ST_RENEGOTIATE:
s->new_session=1;
s->renegotiate=1;
/* s->state=SSL_ST_ACCEPT; */
case SSL_ST_BEFORE:
@ -299,7 +299,7 @@ int dtls1_accept(SSL *s)
case SSL3_ST_SW_SRVR_HELLO_A:
case SSL3_ST_SW_SRVR_HELLO_B:
s->new_session = 2;
s->renegotiate = 2;
dtls1_start_timer(s);
ret=dtls1_send_server_hello(s);
if (ret <= 0) goto end;
@ -620,11 +620,12 @@ int dtls1_accept(SSL *s)
s->init_num=0;
if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
{
/* actually not necessarily a 'new' session unless
* SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
s->renegotiate=0;
s->new_session=0;
ssl_update_cache(s,SSL_SESS_CACHE_SERVER);

3
ssl/s3_clnt.c
View file

@ -207,7 +207,7 @@ int ssl3_connect(SSL *s)
switch(s->state)
{
case SSL_ST_RENEGOTIATE:
s->new_session=1;
s->renegotiate=1;
s->state=SSL_ST_CONNECT;
s->ctx->stats.sess_connect_renegotiate++;
/* break */
@ -563,6 +563,7 @@ int ssl3_connect(SSL *s)
/* else do it later in ssl3_write */
s->init_num=0;
s->renegotiate=0;
s->new_session=0;
ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);

1
ssl/s3_lib.c
View file

@ -2226,6 +2226,7 @@ void ssl3_clear(SSL *s)
s->packet_length=0;
s->s3->renegotiate=0;
s->s3->new_session=0;
s->s3->total_renegotiations=0;
s->s3->num_renegotiations=0;
s->s3->in_read_app_data=0;

1
ssl/s3_pkt.c
View file

@ -1280,6 +1280,7 @@ start:
#else
s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
#endif
s->renegotiate=1;
s->new_session=1;
}
i=s->handshake_func(s);

7
ssl/s3_srvr.c
View file

@ -218,7 +218,7 @@ int ssl3_accept(SSL *s)
switch (s->state)
{
case SSL_ST_RENEGOTIATE:
s->new_session=1;
s->renegotiate=1;
/* s->state=SSL_ST_ACCEPT; */
case SSL_ST_BEFORE:
@ -316,7 +316,7 @@ int ssl3_accept(SSL *s)
ret=ssl3_get_client_hello(s);
if (ret <= 0) goto end;
s->new_session = 2;
s->renegotiate = 2;
s->state=SSL3_ST_SW_SRVR_HELLO_A;
s->init_num=0;
break;
@ -706,11 +706,12 @@ int ssl3_accept(SSL *s)
s->init_num=0;
if (s->new_session == 2) /* skipped if we just sent a HelloRequest */
if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */
{
/* actually not necessarily a 'new' session unless
* SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
s->renegotiate=0;
s->new_session=0;
ssl_update_cache(s,SSL_SESS_CACHE_SERVER);

15
ssl/ssl.h
View file

@ -1050,12 +1050,14 @@ struct ssl_st
int server; /* are we the server side? - mostly used by SSL_clear*/
int new_session;/* 1 if we are to use a new session.
* 2 if we are a server and are inside a handshake
* (i.e. not just sending a HelloRequest)
* NB: For servers, the 'new' session may actually be a previously
* cached session or even the previous session unless
* SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
int new_session;/* Generate a new session or reuse an old one.
* NB: For servers, the 'new' session may actually be a previously
* cached session or even the previous session unless
* SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */
int renegotiate;/* 1 if we are renegotiating.
* 2 if we are a server and are inside a handshake
* (i.e. not just sending a HelloRequest) */
int quiet_shutdown;/* don't send shutdown packets */
int shutdown; /* we have shut things down, 0x01 sent, 0x02
* for received */
@ -1717,6 +1719,7 @@ STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s);
int SSL_do_handshake(SSL *s);
int SSL_renegotiate(SSL *s);
int SSL_renegotiate_abbreviated(SSL *s);
int SSL_renegotiate_pending(SSL *s);
int SSL_shutdown(SSL *s);

26
ssl/ssl_lib.c
View file

@ -202,9 +202,9 @@ int SSL_clear(SSL *s)
* needed because SSL_clear is not called when doing renegotiation) */
/* This is set if we are doing dynamic renegotiation so keep
* the old cipher. It is sort of a SSL_clear_lite :-) */
if (s->new_session) return(1);
if (s->renegotiate) return(1);
#else
if (s->new_session)
if (s->renegotiate)
{
SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
return 0;
@ -1016,18 +1016,29 @@ int SSL_shutdown(SSL *s)
int SSL_renegotiate(SSL *s)
{
if (s->new_session == 0)
{
s->new_session=1;
}
if (s->renegotiate == 0)
s->renegotiate=1;
s->new_session=1;
return(s->method->ssl_renegotiate(s));
}
int SSL_renegotiate_abbreviated(SSL *s)
{
if (s->renegotiate == 0)
s->renegotiate=1;
s->new_session=0;
return(s->method->ssl_renegotiate(s));
}
int SSL_renegotiate_pending(SSL *s)
{
/* becomes true when negotiation is requested;
* false again once a handshake has finished */
return (s->new_session != 0);
return (s->renegotiate != 0);
}
long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
@ -2649,6 +2660,7 @@ SSL *SSL_dup(SSL *s)
ret->in_handshake = s->in_handshake;
ret->handshake_func = s->handshake_func;
ret->server = s->server;
ret->renegotiate = s->renegotiate;
ret->new_session = s->new_session;
ret->quiet_shutdown = s->quiet_shutdown;
ret->shutdown=s->shutdown;