return(ret);
}
+static int ssl23_no_ssl2_ciphers(SSL *s)
+ {
+ SSL_CIPHER *cipher;
+ STACK_OF(SSL_CIPHER) *ciphers;
+ int i;
+ ciphers = SSL_get_ciphers(s);
+ for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
+ {
+ cipher = sk_SSL_CIPHER_value(ciphers, i);
+ if (cipher->algorithm_ssl == SSL_SSLV2)
+ return 0;
+ }
+ return 1;
+ }
static int ssl23_client_hello(SSL *s)
{
ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
+ if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
+ ssl2_compat = 0;
+
if (!(s->options & SSL_OP_NO_TLSv1))
{
version = TLS1_VERSION;
{
version = SSL2_VERSION;
}
+#ifndef OPENSSL_NO_TLSEXT
+ if (version != SSL2_VERSION)
+ {
+ /* have to disable SSL 2.0 compatibility if we need TLS extensions */
+
+ if (s->tlsext_hostname != NULL)
+ ssl2_compat = 0;
+ if (s->tlsext_status_type != -1)
+ ssl2_compat = 0;
+
+#ifdef TLSEXT_TYPE_opaque_prf_input
+ if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL)
+ ssl2_compat = 0;
+#endif
+ }
+#endif
buf=(unsigned char *)s->init_buf->data;
if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
ch_len=SSL2_MAX_CHALLENGE_LENGTH;
/* write out sslv2 challenge */
+ /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
+ because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
+ or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
+ check in for futurproofing */
if (SSL3_RANDOM_SIZE < ch_len)
i=SSL3_RANDOM_SIZE;
else
*(p++)=0; /* Add the NULL method */
#ifndef OPENSSL_NO_TLSEXT
+ /* TLS extensions*/
+ if (ssl_prepare_clienthello_tlsext(s) <= 0)
+ {
+ SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
+ return -1;
+ }
if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
{
SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
ch_len=SSL2_MAX_CHALLENGE_LENGTH;
/* write out sslv2 challenge */
+ /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because
+ it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
+ SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
+ futurproofing */
i=(SSL3_RANDOM_SIZE < ch_len)
?SSL3_RANDOM_SIZE:ch_len;
s->s2->challenge_length=i;
/* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
s->s2->ssl2_rollback=1;
- /* setup the 5 bytes we have read so we get them from
+ /* setup the 7 bytes we have read so we get them from
* the sslv2 buffer */
s->rstate=SSL_ST_READ_HEADER;
s->packet_length=n;
s->handshake_func=s->method->ssl_connect;
#endif
}
- else if ((p[0] == SSL3_RT_HANDSHAKE) &&
- (p[1] == SSL3_VERSION_MAJOR) &&
- ((p[2] == SSL3_VERSION_MINOR) ||
- (p[2] == TLS1_VERSION_MINOR)) &&
- (p[5] == SSL3_MT_SERVER_HELLO))
+ else if (p[1] == SSL3_VERSION_MAJOR &&
+ (p[2] == SSL3_VERSION_MINOR || p[2] == TLS1_VERSION_MINOR) &&
+ ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
+ (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
{
- /* we have sslv3 or tls1 */
-
- if (!ssl_init_wbio_buffer(s,1)) goto err;
-
- /* we are in this state */
- s->state=SSL3_ST_CR_SRVR_HELLO_A;
-
- /* put the 5 bytes we have read into the input buffer
- * for SSLv3 */
- s->rstate=SSL_ST_READ_HEADER;
- s->packet_length=n;
- s->packet= &(s->s3->rbuf.buf[0]);
- memcpy(s->packet,buf,n);
- s->s3->rbuf.left=n;
- s->s3->rbuf.offset=0;
+ /* we have sslv3 or tls1 (server hello or alert) */
if ((p[2] == SSL3_VERSION_MINOR) &&
!(s->options & SSL_OP_NO_SSLv3))
SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
goto err;
}
-
- s->handshake_func=s->method->ssl_connect;
- }
- else if ((p[0] == SSL3_RT_ALERT) &&
- (p[1] == SSL3_VERSION_MAJOR) &&
- ((p[2] == SSL3_VERSION_MINOR) ||
- (p[2] == TLS1_VERSION_MINOR)) &&
- (p[3] == 0) &&
- (p[4] == 2))
- {
- void (*cb)(const SSL *ssl,int type,int val)=NULL;
- int j;
-
- /* An alert */
- if (s->info_callback != NULL)
- cb=s->info_callback;
- else if (s->ctx->info_callback != NULL)
- cb=s->ctx->info_callback;
-
- i=p[5];
- if (cb != NULL)
+
+ if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
{
- j=(i<<8)|p[6];
- cb(s,SSL_CB_READ_ALERT,j);
+ /* fatal alert */
+
+ void (*cb)(const SSL *ssl,int type,int val)=NULL;
+ int j;
+
+ if (s->info_callback != NULL)
+ cb=s->info_callback;
+ else if (s->ctx->info_callback != NULL)
+ cb=s->ctx->info_callback;
+
+ i=p[5];
+ if (cb != NULL)
+ {
+ j=(i<<8)|p[6];
+ cb(s,SSL_CB_READ_ALERT,j);
+ }
+
+ if (s->msg_callback)
+ s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
+
+ s->rwstate=SSL_NOTHING;
+ SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
+ goto err;
}
- s->rwstate=SSL_NOTHING;
- SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
- goto err;
+ if (!ssl_init_wbio_buffer(s,1)) goto err;
+
+ /* we are in this state */
+ s->state=SSL3_ST_CR_SRVR_HELLO_A;
+
+ /* put the 7 bytes we have read into the input buffer
+ * for SSLv3 */
+ s->rstate=SSL_ST_READ_HEADER;
+ s->packet_length=n;
+ if (s->s3->rbuf.buf == NULL)
+ if (!ssl3_setup_read_buffer(s))
+ goto err;
+ s->packet= &(s->s3->rbuf.buf[0]);
+ memcpy(s->packet,buf,n);
+ s->s3->rbuf.left=n;
+ s->s3->rbuf.offset=0;
+
+ s->handshake_func=s->method->ssl_connect;
}
else
{
if (!ssl_get_new_session(s,0))
goto err;
- s->first_packet=1;
return(SSL_connect(s));
err:
return(-1);
}
-
projects / openssl.git / blobdiff