*/
#include <stdio.h>
-#include "buffer.h"
-#include "rand.h"
-#include "objects.h"
-#include "evp.h"
+#include <openssl/buffer.h>
+#include <openssl/rand.h>
+#include <openssl/objects.h>
+#include <openssl/evp.h>
#include "ssl_locl.h"
-#define BREAK break
-
-#ifndef NOPROTO
static SSL_METHOD *ssl23_get_server_method(int ver);
int ssl23_get_client_hello(SSL *s);
-#else
-static SSL_METHOD *ssl23_get_server_method();
-int ssl23_get_client_hello();
-#endif
-
static SSL_METHOD *ssl23_get_server_method(int ver)
{
+#ifndef NO_SSL2
if (ver == SSL2_VERSION)
return(SSLv2_server_method());
- else if (ver == SSL3_VERSION)
+#endif
+ if (ver == SSL3_VERSION)
return(SSLv3_server_method());
else if (ver == TLS1_VERSION)
return(TLSv1_server_method());
int ret= -1;
int new_state,state;
- RAND_seed(&Time,sizeof(Time));
+ RAND_add(&Time,sizeof(Time),0);
ERR_clear_error();
clear_sys_error();
int ssl23_get_client_hello(SSL *s)
{
- char buf_space[8];
+ char buf_space[11]; /* Request this many bytes in initial read.
+ * We can detect SSL 3.0/TLS 1.0 Client Hellos
+ * ('type == 3') correctly only when the following
+ * is in a single record, which is not guaranteed by
+ * the protocol specification:
+ * Byte Content
+ * 0 type \
+ * 1/2 version > record header
+ * 3/4 length /
+ * 5 msg_type \
+ * 6-8 length > Client Hello message
+ * 9/10 client_version /
+ */
char *buf= &(buf_space[0]);
unsigned char *p,*d,*dd;
unsigned int i;
unsigned int csl,sil,cl;
- int n=0,j,tls1=0;
- int type=0,use_sslv2_strong=0;
+ int n=0,j;
+ int type=0;
int v[2];
+#ifndef NO_RSA
+ int use_sslv2_strong=0;
+#endif
- /* read the initial header */
- v[0]=v[1]=0;
if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
{
+ /* read the initial header */
+ v[0]=v[1]=0;
+
if (!ssl3_setup_buffers(s)) goto err;
- n=ssl23_read_bytes(s,7);
- if (n != 7) return(n); /* n == -1 || n == 0 */
+ n=ssl23_read_bytes(s, sizeof buf_space);
+ if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */
p=s->packet;
if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
{
- /* SSLv2 header */
+ /*
+ * SSLv2 header
+ */
if ((p[3] == 0x00) && (p[4] == 0x02))
{
v[0]=p[3]; v[1]=p[4];
{
if (!(s->options & SSL_OP_NO_TLSv1))
{
- tls1=1;
+ s->version=TLS1_VERSION;
+ /* type=2; */ /* done later to survive restarts */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
}
else if (!(s->options & SSL_OP_NO_SSLv3))
{
+ s->version=SSL3_VERSION;
+ /* type=2; */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
}
else if (!(s->options & SSL_OP_NO_SSLv2))
}
}
else if (!(s->options & SSL_OP_NO_SSLv3))
+ {
+ s->version=SSL3_VERSION;
+ /* type=2; */
s->state=SSL23_ST_SR_CLNT_HELLO_B;
+ }
else if (!(s->options & SSL_OP_NO_SSLv2))
type=1;
if (s->options & SSL_OP_NON_EXPORT_FIRST)
+ /* Not only utterly confusing, but broken
+ * ('fractured programming'?) -- the details
+ * of this block nearly make it work
+ * as intended in this environment, but on one
+ * of the fine points (w.r.t. restarts) it fails.
+ * The obvious fix would be even more devastating
+ * to program structure; if you want the functionality,
+ * throw this away and implement it in a way
+ * that makes sense */
{
+#if 0
STACK_OF(SSL_CIPHER) *sk;
SSL_CIPHER *c;
int ne2,ne3;
goto next_bit;
}
}
+#else
+ SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_OPTION);
+ goto err;
+#endif
}
}
}
else if ((p[0] == SSL3_RT_HANDSHAKE) &&
(p[1] == SSL3_VERSION_MAJOR) &&
- (p[5] == SSL3_MT_CLIENT_HELLO))
+ (p[5] == SSL3_MT_CLIENT_HELLO) &&
+ ((p[3] == 0 && p[4] < 5 /* silly record length? */)
+ || (p[9] == p[1])))
{
- v[0]=p[1]; v[1]=p[2];
- /* true SSLv3 or tls1 */
- if (p[2] >= TLS1_VERSION_MINOR)
+ /*
+ * SSLv3 or tls1 header
+ */
+
+ v[0]=p[1]; /* major version */
+ /* We must look at client_version inside the Client Hello message
+ * to get the correct minor version: */
+ v[1]=p[10];
+ /* However if we have only a pathologically small fragment of the
+ * Client Hello message, we simply use the version from the
+ * record header -- this is incorrect but unlikely to fail in
+ * practice */
+ if (p[3] == 0 && p[4] < 6)
+ v[1]=p[2];
+ if (v[1] >= TLS1_VERSION_MINOR)
{
if (!(s->options & SSL_OP_NO_TLSv1))
{
+ s->version=TLS1_VERSION;
type=3;
- tls1=1;
}
else if (!(s->options & SSL_OP_NO_SSLv3))
+ {
+ s->version=SSL3_VERSION;
type=3;
+ }
}
else if (!(s->options & SSL_OP_NO_SSLv3))
+ {
+ s->version=SSL3_VERSION;
type=3;
+ }
}
else if ((strncmp("GET ", (char *)p,4) == 0) ||
(strncmp("POST ",(char *)p,5) == 0) ||
}
}
-next_bit:
if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
{
- /* we have a SSLv3/TLSv1 in a SSLv2 header */
+ /* we have SSLv3/TLSv1 in an SSLv2 header
+ * (other cases skip this state) */
+
type=2;
p=s->packet;
+ v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
+ v[1] = p[4];
+
n=((p[0]&0x7f)<<8)|p[1];
if (n > (1024*4))
{
goto err;
}
- *(d++)=SSL3_VERSION_MAJOR;
- if (tls1)
- *(d++)=TLS1_VERSION_MINOR;
- else
- *(d++)=SSL3_VERSION_MINOR;
+ *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
+ *(d++) = v[1];
/* lets populate the random area */
- /* get the chalenge_length */
+ /* get the challenge_length */
i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
memset(d,0,SSL3_RANDOM_SIZE);
memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
s->s3->tmp.message_size=i;
}
+ /* imaginary new state (for program structure): */
+ /* s->state = SSL23_SR_CLNT_HELLO_C */
+
if (type == 1)
{
+#ifdef NO_SSL2
+ SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
+ goto err;
+#else
/* we are talking sslv2 */
/* we need to clean up the SSLv3/TLSv1 setup and put in the
* sslv2 stuff. */
else
s->s2->ssl2_rollback=1;
- /* setup the 5 bytes we have read so we get them from
+ /* setup the n bytes we have read so we get them from
* the sslv2 buffer */
s->rstate=SSL_ST_READ_HEADER;
s->packet_length=n;
s->method=SSLv2_server_method();
s->handshake_func=s->method->ssl_accept;
+#endif
}
if ((type == 2) || (type == 3))
{
- /* we have SSLv3/TLSv1 */
+ /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
if (!ssl_init_wbio_buffer(s,1)) goto err;
s->s3->rbuf.offset=0;
}
- if (tls1)
- {
- s->version=TLS1_VERSION;
- s->method=TLSv1_server_method();
- }
+ if (s->version == TLS1_VERSION)
+ s->method = TLSv1_server_method();
else
- {
- s->version=SSL3_VERSION;
- s->method=SSLv3_server_method();
- }
+ s->method = SSLv3_server_method();
+#if 0 /* ssl3_get_client_hello does this */
s->client_version=(v[0]<<8)|v[1];
+#endif
s->handshake_func=s->method->ssl_accept;
}
if (buf != buf_space) Free(buf);
return(-1);
}
-
projects / openssl.git / blobdiff