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Implement known-IV countermeasure.

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Fix length checks in ssl3_get_client_hello().

Use s->s3->in_read_app_data differently to fix ssl3_read_internal().
This commit is contained in:
Bodo Möller
2002-04-13 22:51:26 +00:00
parent f89db4020f
commit a9ab63c01c
9 changed files with 306 additions and 49 deletions
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18
ssl/s3_lib.c
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@@ -994,6 +994,7 @@ void ssl3_free(SSL *s)
void ssl3_clear(SSL *s)
{
unsigned char *rp,*wp;
size_t rlen, wlen;
ssl3_cleanup_key_block(s);
if (s->s3->tmp.ca_names != NULL)
@@ -1009,15 +1010,19 @@ void ssl3_clear(SSL *s)
DH_free(s->s3->tmp.dh);
#endif
rp=s->s3->rbuf.buf;
wp=s->s3->wbuf.buf;
rp = s->s3->rbuf.buf;
wp = s->s3->wbuf.buf;
rlen = s->s3->rbuf.len;
wlen = s->s3->wbuf.len;
EVP_MD_CTX_cleanup(&s->s3->finish_dgst1);
EVP_MD_CTX_cleanup(&s->s3->finish_dgst2);
memset(s->s3,0,sizeof *s->s3);
if (rp != NULL) s->s3->rbuf.buf=rp;
if (wp != NULL) s->s3->wbuf.buf=wp;
s->s3->rbuf.buf = rp;
s->s3->wbuf.buf = wp;
s->s3->rbuf.len = rlen;
s->s3->wbuf.len = wlen;
ssl_free_wbio_buffer(s);
@@ -1609,13 +1614,12 @@ static int ssl3_read_internal(SSL *s, void *buf, int len, int peek)
if (s->s3->renegotiate) ssl3_renegotiate_check(s);
s->s3->in_read_app_data=1;
ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len,peek);
if ((ret == -1) && (s->s3->in_read_app_data == 0))
if ((ret == -1) && (s->s3->in_read_app_data == 2))
{
/* ssl3_read_bytes decided to call s->handshake_func, which
* called ssl3_read_bytes to read handshake data.
* However, ssl3_read_bytes actually found application data
* and thinks that application data makes sense here (signalled
* by resetting 'in_read_app_data', strangely); so disable
* and thinks that application data makes sense here; so disable
* handshake processing and try to read application data again. */
s->in_handshake++;
ret=ssl3_read_bytes(s,SSL3_RT_APPLICATION_DATA,buf,len,peek);