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path: root/openssl/ssl/s3_pkt.c
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Diffstat (limited to 'openssl/ssl/s3_pkt.c')
-rw-r--r--openssl/ssl/s3_pkt.c42
1 files changed, 35 insertions, 7 deletions
diff --git a/openssl/ssl/s3_pkt.c b/openssl/ssl/s3_pkt.c
index 96ba63262..59011e39c 100644
--- a/openssl/ssl/s3_pkt.c
+++ b/openssl/ssl/s3_pkt.c
@@ -110,6 +110,7 @@
*/
#include <stdio.h>
+#include <limits.h>
#include <errno.h>
#define USE_SOCKETS
#include "ssl_locl.h"
@@ -580,10 +581,11 @@ int ssl3_do_compress(SSL *ssl)
int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
{
const unsigned char *buf=buf_;
- unsigned int tot,n,nw;
- int i;
+ unsigned int n,nw;
+ int i,tot;
s->rwstate=SSL_NOTHING;
+ OPENSSL_assert(s->s3->wnum <= INT_MAX);
tot=s->s3->wnum;
s->s3->wnum=0;
@@ -598,6 +600,22 @@ int ssl3_write_bytes(SSL *s, int type, const void *buf_, int len)
}
}
+ /* ensure that if we end up with a smaller value of data to write
+ * out than the the original len from a write which didn't complete
+ * for non-blocking I/O and also somehow ended up avoiding
+ * the check for this in ssl3_write_pending/SSL_R_BAD_WRITE_RETRY as
+ * it must never be possible to end up with (len-tot) as a large
+ * number that will then promptly send beyond the end of the users
+ * buffer ... so we trap and report the error in a way the user
+ * will notice
+ */
+ if (len < tot)
+ {
+ SSLerr(SSL_F_SSL3_WRITE_BYTES,SSL_R_BAD_LENGTH);
+ return(-1);
+ }
+
+
n=(len-tot);
for (;;)
{
@@ -641,9 +659,6 @@ static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
SSL3_BUFFER *wb=&(s->s3->wbuf);
SSL_SESSION *sess;
- if (wb->buf == NULL)
- if (!ssl3_setup_write_buffer(s))
- return -1;
/* first check if there is a SSL3_BUFFER still being written
* out. This will happen with non blocking IO */
@@ -659,6 +674,10 @@ static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
/* if it went, fall through and send more stuff */
}
+ if (wb->buf == NULL)
+ if (!ssl3_setup_write_buffer(s))
+ return -1;
+
if (len == 0 && !create_empty_fragment)
return 0;
@@ -1055,7 +1074,7 @@ start:
{
s->rstate=SSL_ST_READ_HEADER;
rr->off=0;
- if (s->mode & SSL_MODE_RELEASE_BUFFERS)
+ if (s->mode & SSL_MODE_RELEASE_BUFFERS && s->s3->rbuf.left == 0)
ssl3_release_read_buffer(s);
}
}
@@ -1297,6 +1316,15 @@ start:
goto f_err;
}
+ if (!(s->s3->flags & SSL3_FLAGS_CCS_OK))
+ {
+ al=SSL_AD_UNEXPECTED_MESSAGE;
+ SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_CCS_RECEIVED_EARLY);
+ goto f_err;
+ }
+
+ s->s3->flags &= ~SSL3_FLAGS_CCS_OK;
+
rr->length=0;
if (s->msg_callback)
@@ -1431,7 +1459,7 @@ int ssl3_do_change_cipher_spec(SSL *s)
if (s->s3->tmp.key_block == NULL)
{
- if (s->session == NULL)
+ if (s->session == NULL || s->session->master_key_length == 0)
{
/* might happen if dtls1_read_bytes() calls this */
SSLerr(SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC,SSL_R_CCS_RECEIVED_EARLY);