Delete bundled copy of OpenSSL and replace with README.

openssl/ssl/s3_pkt.c

Index: openssl/ssl/s3_pkt.c
diff --git a/openssl/ssl/s3_pkt.c b/openssl/ssl/s3_pkt.c
deleted file mode 100644
index 03ed461add30d27567750ca73abc20e289c84ca6..0000000000000000000000000000000000000000
--- a/openssl/ssl/s3_pkt.c
+++ /dev/null
@@ -1,1538 +0,0 @@
-/* ssl/s3_pkt.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- * 
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * 
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include <stdio.h>
-#include <errno.h>
-#define USE_SOCKETS
-#include "ssl_locl.h"
-#include <openssl/evp.h>
-#include <openssl/buffer.h>
-#include <openssl/rand.h>
-
-static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
-			 unsigned int len, int create_empty_fragment);
-static int ssl3_get_record(SSL *s);
-
-int ssl3_read_n(SSL *s, int n, int max, int extend)
-	{
-	/* If extend == 0, obtain new n-byte packet; if extend == 1, increase
-	 * packet by another n bytes.
-	 * The packet will be in the sub-array of s->s3->rbuf.buf specified
-	 * by s->packet and s->packet_length.
-	 * (If s->read_ahead is set, 'max' bytes may be stored in rbuf
-	 * [plus s->packet_length bytes if extend == 1].)
-	 */
-	int i,len,left;
-	long align=0;
-	unsigned char *pkt;
-	SSL3_BUFFER *rb;
-
-	if (n <= 0) return n;
-
-	rb    = &(s->s3->rbuf);
-	if (rb->buf == NULL)
-		if (!ssl3_setup_read_buffer(s))
-			return -1;
-
-	left  = rb->left;
-#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
-	align = (long)rb->buf + SSL3_RT_HEADER_LENGTH;
-	align = (-align)&(SSL3_ALIGN_PAYLOAD-1);
-#endif
-
-	if (!extend)
-		{
-		/* start with empty packet ... */
-		if (left == 0)
-			rb->offset = align;
-		else if (align != 0 && left >= SSL3_RT_HEADER_LENGTH)
-			{
-			/* check if next packet length is large
-			 * enough to justify payload alignment... */
-			pkt = rb->buf + rb->offset;
-			if (pkt[0] == SSL3_RT_APPLICATION_DATA
-			    && (pkt[3]<<8|pkt[4]) >= 128)
-				{
-				/* Note that even if packet is corrupted
-				 * and its length field is insane, we can
-				 * only be led to wrong decision about
-				 * whether memmove will occur or not.
-				 * Header values has no effect on memmove
-				 * arguments and therefore no buffer
-				 * overrun can be triggered. */
-				memmove (rb->buf+align,pkt,left);
-				rb->offset = align;
-				}
-			}
-		s->packet = rb->buf + rb->offset;
-		s->packet_length = 0;
-		/* ... now we can act as if 'extend' was set */
-		}
-
-	/* For DTLS/UDP reads should not span multiple packets
-	 * because the read operation returns the whole packet
-	 * at once (as long as it fits into the buffer). */
-	if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
-		{
-		if (left > 0 && n > left)
-			n = left;
-		}
-
-	/* if there is enough in the buffer from a previous read, take some */
-	if (left >= n)
-		{
-		s->packet_length+=n;
-		rb->left=left-n;
-		rb->offset+=n;
-		return(n);
-		}
-
-	/* else we need to read more data */
-
-	len = s->packet_length;
-	pkt = rb->buf+align;
-	/* Move any available bytes to front of buffer:
-	 * 'len' bytes already pointed to by 'packet',
-	 * 'left' extra ones at the end */
-	if (s->packet != pkt) /* len > 0 */
-		{
-		memmove(pkt, s->packet, len+left);
-		s->packet = pkt;
-		rb->offset = len + align;
-		}
-
-	if (n > (int)(rb->len - rb->offset)) /* does not happen */
-		{
-		SSLerr(SSL_F_SSL3_READ_N,ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-
-	if (!s->read_ahead)
-		/* ignore max parameter */
-		max = n;
-	else
-		{
-		if (max < n)
-			max = n;
-		if (max > (int)(rb->len - rb->offset))
-			max = rb->len - rb->offset;
-		}
-
-	while (left < n)
-		{
-		/* Now we have len+left bytes at the front of s->s3->rbuf.buf
-		 * and need to read in more until we have len+n (up to
-		 * len+max if possible) */
-
-		clear_sys_error();
-		if (s->rbio != NULL)
-			{
-			s->rwstate=SSL_READING;
-			i=BIO_read(s->rbio,pkt+len+left, max-left);
-			}
-		else
-			{
-			SSLerr(SSL_F_SSL3_READ_N,SSL_R_READ_BIO_NOT_SET);
-			i = -1;
-			}
-
-		if (i <= 0)
-			{
-			rb->left = left;
-			if (s->mode & SSL_MODE_RELEASE_BUFFERS &&
-			    SSL_version(s) != DTLS1_VERSION && SSL_version(s) != DTLS1_BAD_VER)
-				if (len+left == 0)
-					ssl3_release_read_buffer(s);
-			return(i);
-			}
-		left+=i;
-		/* reads should *never* span multiple packets for DTLS because
-		 * the underlying transport protocol is message oriented as opposed
-		 * to byte oriented as in the TLS case. */
-		if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
-			{
-			if (n > left)
-				n = left; /* makes the while condition false */
-			}
-		}
-
-	/* done reading, now the book-keeping */
-	rb->offset += n;
-	rb->left = left - n;
-	s->packet_length += n;
-	s->rwstate=SSL_NOTHING;
-	return(n);
-	}
-
-/* Call this to get a new input record.
- * It will return <= 0 if more data is needed, normally due to an error
- * or non-blocking IO.
- * When it finishes, one packet has been decoded and can be found in
- * ssl->s3->rrec.type    - is the type of record
- * ssl->s3->rrec.data, 	 - data
- * ssl->s3->rrec.length, - number of bytes
- */
-/* used only by ssl3_read_bytes */
-static int ssl3_get_record(SSL *s)
-	{
-	int ssl_major,ssl_minor,al;
-	int enc_err,n,i,ret= -1;
-	SSL3_RECORD *rr;
-	SSL_SESSION *sess;
-	unsigned char *p;
-	unsigned char md[EVP_MAX_MD_SIZE];
-	short version;
-	unsigned mac_size, orig_len;
-	size_t extra;
-
-	rr= &(s->s3->rrec);
-	sess=s->session;
-
-	if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
-		extra=SSL3_RT_MAX_EXTRA;
-	else
-		extra=0;
-	if (extra && !s->s3->init_extra)
-		{
-		/* An application error: SLS_OP_MICROSOFT_BIG_SSLV3_BUFFER
-		 * set after ssl3_setup_buffers() was done */
-		SSLerr(SSL_F_SSL3_GET_RECORD, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-
-again:
-	/* check if we have the header */
-	if (	(s->rstate != SSL_ST_READ_BODY) ||
-		(s->packet_length < SSL3_RT_HEADER_LENGTH)) 
-		{
-		n=ssl3_read_n(s, SSL3_RT_HEADER_LENGTH, s->s3->rbuf.len, 0);
-		if (n <= 0) return(n); /* error or non-blocking */
-		s->rstate=SSL_ST_READ_BODY;
-
-		p=s->packet;
-
-		/* Pull apart the header into the SSL3_RECORD */
-		rr->type= *(p++);
-		ssl_major= *(p++);
-		ssl_minor= *(p++);
-		version=(ssl_major<<8)|ssl_minor;
-		n2s(p,rr->length);
-#if 0
-fprintf(stderr, "Record type=%d, Length=%d\n", rr->type, rr->length);
-#endif
-
-		/* Lets check version */
-		if (!s->first_packet)
-			{
-			if (version != s->version)
-				{
-				SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
-                                if ((s->version & 0xFF00) == (version & 0xFF00))
-                                	/* Send back error using their minor version number :-) */
-					s->version = (unsigned short)version;
-				al=SSL_AD_PROTOCOL_VERSION;
-				goto f_err;
-				}
-			}
-
-		if ((version>>8) != SSL3_VERSION_MAJOR)
-			{
-			SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_WRONG_VERSION_NUMBER);
-			goto err;
-			}
-
-		if (rr->length > s->s3->rbuf.len - SSL3_RT_HEADER_LENGTH)
-			{
-			al=SSL_AD_RECORD_OVERFLOW;
-			SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_PACKET_LENGTH_TOO_LONG);
-			goto f_err;
-			}
-
-		/* now s->rstate == SSL_ST_READ_BODY */
-		}
-
-	/* s->rstate == SSL_ST_READ_BODY, get and decode the data */
-
-	if (rr->length > s->packet_length-SSL3_RT_HEADER_LENGTH)
-		{
-		/* now s->packet_length == SSL3_RT_HEADER_LENGTH */
-		i=rr->length;
-		n=ssl3_read_n(s,i,i,1);
-		if (n <= 0) return(n); /* error or non-blocking io */
-		/* now n == rr->length,
-		 * and s->packet_length == SSL3_RT_HEADER_LENGTH + rr->length */
-		}
-
-	s->rstate=SSL_ST_READ_HEADER; /* set state for later operations */
-
-	/* At this point, s->packet_length == SSL3_RT_HEADER_LNGTH + rr->length,
-	 * and we have that many bytes in s->packet
-	 */
-	rr->input= &(s->packet[SSL3_RT_HEADER_LENGTH]);
-
-	/* ok, we can now read from 's->packet' data into 'rr'
-	 * rr->input points at rr->length bytes, which
-	 * need to be copied into rr->data by either
-	 * the decryption or by the decompression
-	 * When the data is 'copied' into the rr->data buffer,
-	 * rr->input will be pointed at the new buffer */ 
-
-	/* We now have - encrypted [ MAC [ compressed [ plain ] ] ]
-	 * rr->length bytes of encrypted compressed stuff. */
-
-	/* check is not needed I believe */
-	if (rr->length > SSL3_RT_MAX_ENCRYPTED_LENGTH+extra)
-		{
-		al=SSL_AD_RECORD_OVERFLOW;
-		SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_ENCRYPTED_LENGTH_TOO_LONG);
-		goto f_err;
-		}
-
-	/* decrypt in place in 'rr->input' */
-	rr->data=rr->input;
-
-	enc_err = s->method->ssl3_enc->enc(s,0);
-	/* enc_err is:
-	 *    0: (in non-constant time) if the record is publically invalid.
-	 *    1: if the padding is valid
-	 *    -1: if the padding is invalid */
-	if (enc_err == 0)
-		{
-		al=SSL_AD_DECRYPTION_FAILED;
-		SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
-		goto f_err;
-		}
-
-#ifdef TLS_DEBUG
-printf("dec %d\n",rr->length);
-{ unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':'\n'); }
-printf("\n");
-#endif
-
-	/* r->length is now the compressed data plus mac */
-	if ((sess != NULL) &&
-	    (s->enc_read_ctx != NULL) &&
-	    (EVP_MD_CTX_md(s->read_hash) != NULL))
-		{
-		/* s->read_hash != NULL => mac_size != -1 */
-		unsigned char *mac = NULL;
-		unsigned char mac_tmp[EVP_MAX_MD_SIZE];
-		mac_size=EVP_MD_CTX_size(s->read_hash);
-		OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE);
-
-		/* kludge: *_cbc_remove_padding passes padding length in rr->type */
-		orig_len = rr->length+((unsigned int)rr->type>>8);
-
-		/* orig_len is the length of the record before any padding was
-		 * removed. This is public information, as is the MAC in use,
-		 * therefore we can safely process the record in a different
-		 * amount of time if it's too short to possibly contain a MAC.
-		 */
-		if (orig_len < mac_size ||
-		    /* CBC records must have a padding length byte too. */
-		    (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
-		     orig_len < mac_size+1))
-			{
-			al=SSL_AD_DECODE_ERROR;
-			SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT);
-			goto f_err;
-			}
-
-		if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE)
-			{
-			/* We update the length so that the TLS header bytes
-			 * can be constructed correctly but we need to extract
-			 * the MAC in constant time from within the record,
-			 * without leaking the contents of the padding bytes.
-			 * */
-			mac = mac_tmp;
-			ssl3_cbc_copy_mac(mac_tmp, rr, mac_size, orig_len);
-			rr->length -= mac_size;
-			}
-		else
-			{
-			/* In this case there's no padding, so |orig_len|
-			 * equals |rec->length| and we checked that there's
-			 * enough bytes for |mac_size| above. */
-			rr->length -= mac_size;
-			mac = &rr->data[rr->length];
-			}
-
-		i=s->method->ssl3_enc->mac(s,md,0 /* not send */);
-		if (i < 0 || mac == NULL || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0)
-			enc_err = -1;
-		if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size)
-			enc_err = -1;
-		}
-
-	if (enc_err < 0)
-		{
-		/* A separate 'decryption_failed' alert was introduced with TLS 1.0,
-		 * SSL 3.0 only has 'bad_record_mac'.  But unless a decryption
-		 * failure is directly visible from the ciphertext anyway,
-		 * we should not reveal which kind of error occured -- this
-		 * might become visible to an attacker (e.g. via a logfile) */
-		al=SSL_AD_BAD_RECORD_MAC;
-		SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC);
-		goto f_err;
-		}
-
-	/* r->length is now just compressed */
-	if (s->expand != NULL)
-		{
-		if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra)
-			{
-			al=SSL_AD_RECORD_OVERFLOW;
-			SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG);
-			goto f_err;
-			}
-		if (!ssl3_do_uncompress(s))
-			{
-			al=SSL_AD_DECOMPRESSION_FAILURE;
-			SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION);
-			goto f_err;
-			}
-		}
-
-	if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH+extra)
-		{
-		al=SSL_AD_RECORD_OVERFLOW;
-		SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG);
-		goto f_err;
-		}
-
-	rr->off=0;
-	/* So at this point the following is true
-	 * ssl->s3->rrec.type 	is the type of record
-	 * ssl->s3->rrec.length	== number of bytes in record
-	 * ssl->s3->rrec.off	== offset to first valid byte
-	 * ssl->s3->rrec.data	== where to take bytes from, increment
-	 *			   after use :-).
-	 */
-
-	/* we have pulled in a full packet so zero things */
-	s->packet_length=0;
-
-	/* just read a 0 length packet */
-	if (rr->length == 0) goto again;
-
-#if 0
-fprintf(stderr, "Ultimate Record type=%d, Length=%d\n", rr->type, rr->length);
-#endif
-
-	return(1);
-
-f_err:
-	ssl3_send_alert(s,SSL3_AL_FATAL,al);
-err:
-	return(ret);
-	}
-
-int ssl3_do_uncompress(SSL *ssl)
-	{
-#ifndef OPENSSL_NO_COMP
-	int i;
-	SSL3_RECORD *rr;
-
-	rr= &(ssl->s3->rrec);
-	i=COMP_expand_block(ssl->expand,rr->comp,
-		SSL3_RT_MAX_PLAIN_LENGTH,rr->data,(int)rr->length);
-	if (i < 0)
-		return(0);
-	else
-		rr->length=i;
-	rr->data=rr->comp;
-#endif
-	return(1);
-	}
-
-int ssl3_do_compress(SSL *ssl)
-	{
-#ifndef OPENSSL_NO_COMP
-	int i;
-	SSL3_RECORD *wr;
-
-	wr= &(ssl->s3->wrec);
-	i=COMP_compress_block(ssl->compress,wr->data,
-		SSL3_RT_MAX_COMPRESSED_LENGTH,
-		wr->input,(int)wr->length);
-	if (i < 0)
-		return(0);
-	else
-		wr->length=i;
-
-	wr->input=wr->data;
-#endif
-	return(1);
-	}
-
-/* Call this to write data in records of type 'type'
- * It will return <= 0 if not all data has been sent or non-blocking IO.
- */
-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;
-
-	s->rwstate=SSL_NOTHING;
-	tot=s->s3->wnum;
-	s->s3->wnum=0;
-
-	if (SSL_in_init(s) && !s->in_handshake)
-		{
-		i=s->handshake_func(s);
-		if (i < 0) return(i);
-		if (i == 0)
-			{
-			SSLerr(SSL_F_SSL3_WRITE_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-			return -1;
-			}
-		}
-
-	n=(len-tot);
-	for (;;)
-		{
-		if (n > s->max_send_fragment)
-			nw=s->max_send_fragment;
-		else
-			nw=n;
-
-		i=do_ssl3_write(s, type, &(buf[tot]), nw, 0);
-		if (i <= 0)
-			{
-			s->s3->wnum=tot;
-			return i;
-			}
-
-		if ((i == (int)n) ||
-			(type == SSL3_RT_APPLICATION_DATA &&
-			 (s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE)))
-			{
-			/* next chunk of data should get another prepended empty fragment
-			 * in ciphersuites with known-IV weakness: */
-			s->s3->empty_fragment_done = 0;
-			
-			return tot+i;
-			}
-
-		n-=i;
-		tot+=i;
-		}
-	}
-
-static int do_ssl3_write(SSL *s, int type, const unsigned char *buf,
-			 unsigned int len, int create_empty_fragment)
-	{
-	unsigned char *p,*plen;
-	int i,mac_size,clear=0;
-	int prefix_len=0;
-	int eivlen;
-	long align=0;
-	SSL3_RECORD *wr;
-	SSL3_BUFFER *wb=&(s->s3->wbuf);
-	SSL_SESSION *sess;
-
-
-	/* first check if there is a SSL3_BUFFER still being written
-	 * out.  This will happen with non blocking IO */
-	if (wb->left != 0)
-		return(ssl3_write_pending(s,type,buf,len));
-
-	/* If we have an alert to send, lets send it */
-	if (s->s3->alert_dispatch)
-		{
-		i=s->method->ssl_dispatch_alert(s);
-		if (i <= 0)
-			return(i);
-		/* 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;
-
-	wr= &(s->s3->wrec);
-	sess=s->session;
-
-	if (	(sess == NULL) ||
-		(s->enc_write_ctx == NULL) ||
-		(EVP_MD_CTX_md(s->write_hash) == NULL))
-		{
-#if 1
-		clear=s->enc_write_ctx?0:1;	/* must be AEAD cipher */
-#else
-		clear=1;
-#endif
-		mac_size=0;
-		}
-	else
-		{
-		mac_size=EVP_MD_CTX_size(s->write_hash);
-		if (mac_size < 0)
-			goto err;
-		}
-
-	/* 'create_empty_fragment' is true only when this function calls itself */
-	if (!clear && !create_empty_fragment && !s->s3->empty_fragment_done)
-		{
-		/* countermeasure against known-IV weakness in CBC ciphersuites
-		 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
-
-		if (s->s3->need_empty_fragments && type == SSL3_RT_APPLICATION_DATA)
-			{
-			/* recursive function call with 'create_empty_fragment' set;
-			 * this prepares and buffers the data for an empty fragment
-			 * (these 'prefix_len' bytes are sent out later
-			 * together with the actual payload) */
-			prefix_len = do_ssl3_write(s, type, buf, 0, 1);
-			if (prefix_len <= 0)
-				goto err;
-
-			if (prefix_len >
-		(SSL3_RT_HEADER_LENGTH + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD))
-				{
-				/* insufficient space */
-				SSLerr(SSL_F_DO_SSL3_WRITE, ERR_R_INTERNAL_ERROR);
-				goto err;
-				}
-			}
-		
-		s->s3->empty_fragment_done = 1;
-		}
-
-	if (create_empty_fragment)
-		{
-#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
-		/* extra fragment would be couple of cipher blocks,
-		 * which would be multiple of SSL3_ALIGN_PAYLOAD, so
-		 * if we want to align the real payload, then we can
-		 * just pretent we simply have two headers. */
-		align = (long)wb->buf + 2*SSL3_RT_HEADER_LENGTH;
-		align = (-align)&(SSL3_ALIGN_PAYLOAD-1);
-#endif
-		p = wb->buf + align;
-		wb->offset  = align;
-		}
-	else if (prefix_len)
-		{
-		p = wb->buf + wb->offset + prefix_len;
-		}
-	else
-		{
-#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
-		align = (long)wb->buf + SSL3_RT_HEADER_LENGTH;
-		align = (-align)&(SSL3_ALIGN_PAYLOAD-1);
-#endif
-		p = wb->buf + align;
-		wb->offset  = align;
-		}
-
-	/* write the header */
-
-	*(p++)=type&0xff;
-	wr->type=type;
-
-	*(p++)=(s->version>>8);
-	/* Some servers hang if iniatial client hello is larger than 256
-	 * bytes and record version number > TLS 1.0
-	 */
-	if (s->state == SSL3_ST_CW_CLNT_HELLO_B
-				&& !s->renegotiate
-				&& TLS1_get_version(s) > TLS1_VERSION)
-		*(p++) = 0x1;
-	else
-		*(p++)=s->version&0xff;
-
-	/* field where we are to write out packet length */
-	plen=p; 
-	p+=2;
-	/* Explicit IV length, block ciphers and TLS version 1.1 or later */
-	if (s->enc_write_ctx && s->version >= TLS1_1_VERSION)
-		{
-		int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx);
-		if (mode == EVP_CIPH_CBC_MODE)
-			{
-			eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx);
-			if (eivlen <= 1)
-				eivlen = 0;
-			}
-		/* Need explicit part of IV for GCM mode */
-		else if (mode == EVP_CIPH_GCM_MODE)
-			eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN;
-		else
-			eivlen = 0;
-		}
-	else if (s->aead_write_ctx != NULL &&
-		 s->aead_write_ctx->variable_nonce_included_in_record)
-		{
-		eivlen = s->aead_write_ctx->variable_nonce_len;
-		}
-	else
-		eivlen = 0;
-
-	/* lets setup the record stuff. */
-	wr->data=p + eivlen;
-	wr->length=(int)len;
-	wr->input=(unsigned char *)buf;
-
-	/* we now 'read' from wr->input, wr->length bytes into
-	 * wr->data */
-
-	/* first we compress */
-	if (s->compress != NULL)
-		{
-		if (!ssl3_do_compress(s))
-			{
-			SSLerr(SSL_F_DO_SSL3_WRITE,SSL_R_COMPRESSION_FAILURE);
-			goto err;
-			}
-		}
-	else
-		{
-		memcpy(wr->data,wr->input,wr->length);
-		wr->input=wr->data;
-		}
-
-	/* we should still have the output to wr->data and the input
-	 * from wr->input.  Length should be wr->length.
-	 * wr->data still points in the wb->buf */
-
-	if (mac_size != 0)
-		{
-		if (s->method->ssl3_enc->mac(s,&(p[wr->length + eivlen]),1) < 0)
-			goto err;
-		wr->length+=mac_size;
-		}
-
-	wr->input=p;
-	wr->data=p;
-
-	if (eivlen)
-		{
-	/*	if (RAND_pseudo_bytes(p, eivlen) <= 0)
-			goto err; */
-		wr->length += eivlen;
-		}
-
-	/* ssl3_enc can only have an error on read */
-	s->method->ssl3_enc->enc(s,1);
-
-	/* record length after mac and block padding */
-	s2n(wr->length,plen);
-
-	/* we should now have
-	 * wr->data pointing to the encrypted data, which is
-	 * wr->length long */
-	wr->type=type; /* not needed but helps for debugging */
-	wr->length+=SSL3_RT_HEADER_LENGTH;
-
-	if (create_empty_fragment)
-		{
-		/* we are in a recursive call;
-		 * just return the length, don't write out anything here
-		 */
-		return wr->length;
-		}
-
-	/* now let's set up wb */
-	wb->left = prefix_len + wr->length;
-
-	/* memorize arguments so that ssl3_write_pending can detect bad write retries later */
-	s->s3->wpend_tot=len;
-	s->s3->wpend_buf=buf;
-	s->s3->wpend_type=type;
-	s->s3->wpend_ret=len;
-
-	/* we now just need to write the buffer */
-	return ssl3_write_pending(s,type,buf,len);
-err:
-	return -1;
-	}
-
-/* if s->s3->wbuf.left != 0, we need to call this */
-int ssl3_write_pending(SSL *s, int type, const unsigned char *buf,
-	unsigned int len)
-	{
-	int i;
-	SSL3_BUFFER *wb=&(s->s3->wbuf);
-
-/* XXXX */
-	if ((s->s3->wpend_tot > (int)len)
-		|| ((s->s3->wpend_buf != buf) &&
-			!(s->mode & SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER))
-		|| (s->s3->wpend_type != type))
-		{
-		SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BAD_WRITE_RETRY);
-		return(-1);
-		}
-
-	for (;;)
-		{
-		clear_sys_error();
-		if (s->wbio != NULL)
-			{
-			s->rwstate=SSL_WRITING;
-			i=BIO_write(s->wbio,
-				(char *)&(wb->buf[wb->offset]),
-				(unsigned int)wb->left);
-			}
-		else
-			{
-			SSLerr(SSL_F_SSL3_WRITE_PENDING,SSL_R_BIO_NOT_SET);
-			i= -1;
-			}
-		if (i == wb->left)
-			{
-			wb->left=0;
-			wb->offset+=i;
-			if (s->mode & SSL_MODE_RELEASE_BUFFERS &&
-			    SSL_version(s) != DTLS1_VERSION && SSL_version(s) != DTLS1_BAD_VER)
-				ssl3_release_write_buffer(s);
-			s->rwstate=SSL_NOTHING;
-			return(s->s3->wpend_ret);
-			}
-		else if (i <= 0) {
-			if (s->version == DTLS1_VERSION ||
-			    s->version == DTLS1_BAD_VER) {
-				/* For DTLS, just drop it. That's kind of the whole
-				   point in using a datagram service */
-				wb->left = 0;
-			}
-			return(i);
-		}
-		wb->offset+=i;
-		wb->left-=i;
-		}
-	}
-
-/* Return up to 'len' payload bytes received in 'type' records.
- * 'type' is one of the following:
- *
- *   -  SSL3_RT_HANDSHAKE (when ssl3_get_message calls us)
- *   -  SSL3_RT_APPLICATION_DATA (when ssl3_read calls us)
- *   -  0 (during a shutdown, no data has to be returned)
- *
- * If we don't have stored data to work from, read a SSL/TLS record first
- * (possibly multiple records if we still don't have anything to return).
- *
- * This function must handle any surprises the peer may have for us, such as
- * Alert records (e.g. close_notify), ChangeCipherSpec records (not really
- * a surprise, but handled as if it were), or renegotiation requests.
- * Also if record payloads contain fragments too small to process, we store
- * them until there is enough for the respective protocol (the record protocol
- * may use arbitrary fragmentation and even interleaving):
- *     Change cipher spec protocol
- *             just 1 byte needed, no need for keeping anything stored
- *     Alert protocol
- *             2 bytes needed (AlertLevel, AlertDescription)
- *     Handshake protocol
- *             4 bytes needed (HandshakeType, uint24 length) -- we just have
- *             to detect unexpected Client Hello and Hello Request messages
- *             here, anything else is handled by higher layers
- *     Application data protocol
- *             none of our business
- */
-int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
-	{
-	int al,i,j,ret;
-	unsigned int n;
-	SSL3_RECORD *rr;
-	void (*cb)(const SSL *ssl,int type2,int val)=NULL;
-
-	if (s->s3->rbuf.buf == NULL) /* Not initialized yet */
-		if (!ssl3_setup_read_buffer(s))
-			return(-1);
-
-	if ((type && (type != SSL3_RT_APPLICATION_DATA) && (type != SSL3_RT_HANDSHAKE) && type) ||
-	    (peek && (type != SSL3_RT_APPLICATION_DATA)))
-		{
-		SSLerr(SSL_F_SSL3_READ_BYTES, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-
-	if ((type == SSL3_RT_HANDSHAKE) && (s->s3->handshake_fragment_len > 0))
-		/* (partially) satisfy request from storage */
-		{
-		unsigned char *src = s->s3->handshake_fragment;
-		unsigned char *dst = buf;
-		unsigned int k;
-
-		/* peek == 0 */
-		n = 0;
-		while ((len > 0) && (s->s3->handshake_fragment_len > 0))
-			{
-			*dst++ = *src++;
-			len--; s->s3->handshake_fragment_len--;
-			n++;
-			}
-		/* move any remaining fragment bytes: */
-		for (k = 0; k < s->s3->handshake_fragment_len; k++)
-			s->s3->handshake_fragment[k] = *src++;
-		return n;
-	}
-
-	/* Now s->s3->handshake_fragment_len == 0 if type == SSL3_RT_HANDSHAKE. */
-
-	if (!s->in_handshake && SSL_in_init(s))
-		{
-		/* type == SSL3_RT_APPLICATION_DATA */
-		i=s->handshake_func(s);
-		if (i < 0) return(i);
-		if (i == 0)
-			{
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-			return(-1);
-			}
-		}
-start:
-	s->rwstate=SSL_NOTHING;
-
-	/* s->s3->rrec.type	    - is the type of record
-	 * s->s3->rrec.data,    - data
-	 * s->s3->rrec.off,     - offset into 'data' for next read
-	 * s->s3->rrec.length,  - number of bytes. */
-	rr = &(s->s3->rrec);
-
-	/* get new packet if necessary */
-	if ((rr->length == 0) || (s->rstate == SSL_ST_READ_BODY))
-		{
-		ret=ssl3_get_record(s);
-		if (ret <= 0) return(ret);
-		}
-
-	/* we now have a packet which can be read and processed */
-
-	if (s->s3->change_cipher_spec /* set when we receive ChangeCipherSpec,
-	                               * reset by ssl3_get_finished */
-		&& (rr->type != SSL3_RT_HANDSHAKE))
-		{
-		al=SSL_AD_UNEXPECTED_MESSAGE;
-		SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_DATA_BETWEEN_CCS_AND_FINISHED);
-		goto f_err;
-		}
-
-	/* If the other end has shut down, throw anything we read away
-	 * (even in 'peek' mode) */
-	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
-		{
-		rr->length=0;
-		s->rwstate=SSL_NOTHING;
-		return(0);
-		}
-
-
-	if (type == rr->type) /* SSL3_RT_APPLICATION_DATA or SSL3_RT_HANDSHAKE */
-		{
-		/* make sure that we are not getting application data when we
-		 * are doing a handshake for the first time */
-		if (SSL_in_init(s) && (type == SSL3_RT_APPLICATION_DATA) &&
-			(s->enc_read_ctx == NULL))
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_APP_DATA_IN_HANDSHAKE);
-			goto f_err;
-			}
-
-		if (len <= 0) return(len);
-
-		if ((unsigned int)len > rr->length)
-			n = rr->length;
-		else
-			n = (unsigned int)len;
-
-		memcpy(buf,&(rr->data[rr->off]),n);
-		if (!peek)
-			{
-			rr->length-=n;
-			rr->off+=n;
-			if (rr->length == 0)
-				{
-				s->rstate=SSL_ST_READ_HEADER;
-				rr->off=0;
-				if (s->mode & SSL_MODE_RELEASE_BUFFERS && s->s3->rbuf.left == 0)
-					ssl3_release_read_buffer(s);
-				}
-			}
-		return(n);
-		}
-
-
-	/* If we get here, then type != rr->type; if we have a handshake
-	 * message, then it was unexpected (Hello Request or Client Hello). */
-
-	/* In case of record types for which we have 'fragment' storage,
-	 * fill that so that we can process the data at a fixed place.
-	 */
-		{
-		unsigned int dest_maxlen = 0;
-		unsigned char *dest = NULL;
-		unsigned int *dest_len = NULL;
-
-		if (rr->type == SSL3_RT_HANDSHAKE)
-			{
-			dest_maxlen = sizeof s->s3->handshake_fragment;
-			dest = s->s3->handshake_fragment;
-			dest_len = &s->s3->handshake_fragment_len;
-			}
-		else if (rr->type == SSL3_RT_ALERT)
-			{
-			dest_maxlen = sizeof s->s3->alert_fragment;
-			dest = s->s3->alert_fragment;
-			dest_len = &s->s3->alert_fragment_len;
-			}
-#ifndef OPENSSL_NO_HEARTBEATS
-		else if (rr->type == TLS1_RT_HEARTBEAT)
-			{
-			tls1_process_heartbeat(s);
-
-			/* Exit and notify application to read again */
-			rr->length = 0;
-			s->rwstate=SSL_READING;
-			BIO_clear_retry_flags(SSL_get_rbio(s));
-			BIO_set_retry_read(SSL_get_rbio(s));
-			return(-1);
-			}
-#endif
-
-		if (dest_maxlen > 0)
-			{
-			n = dest_maxlen - *dest_len; /* available space in 'dest' */
-			if (rr->length < n)
-				n = rr->length; /* available bytes */
-
-			/* now move 'n' bytes: */
-			while (n-- > 0)
-				{
-				dest[(*dest_len)++] = rr->data[rr->off++];
-				rr->length--;
-				}
-
-			if (*dest_len < dest_maxlen)
-				goto start; /* fragment was too small */
-			}
-		}
-
-	/* s->s3->handshake_fragment_len == 4  iff  rr->type == SSL3_RT_HANDSHAKE;
-	 * s->s3->alert_fragment_len == 2      iff  rr->type == SSL3_RT_ALERT.
-	 * (Possibly rr is 'empty' now, i.e. rr->length may be 0.) */
-
-	/* If we are a client, check for an incoming 'Hello Request': */
-	if ((!s->server) &&
-		(s->s3->handshake_fragment_len >= 4) &&
-		(s->s3->handshake_fragment[0] == SSL3_MT_HELLO_REQUEST) &&
-		(s->session != NULL) && (s->session->cipher != NULL))
-		{
-		s->s3->handshake_fragment_len = 0;
-
-		if ((s->s3->handshake_fragment[1] != 0) ||
-			(s->s3->handshake_fragment[2] != 0) ||
-			(s->s3->handshake_fragment[3] != 0))
-			{
-			al=SSL_AD_DECODE_ERROR;
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_HELLO_REQUEST);
-			goto f_err;
-			}
-
-		if (s->msg_callback)
-			s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->s3->handshake_fragment, 4, s, s->msg_callback_arg);
-
-		if (SSL_is_init_finished(s) &&
-			!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS) &&
-			!s->s3->renegotiate)
-			{
-			ssl3_renegotiate(s);
-			if (ssl3_renegotiate_check(s))
-				{
-				i=s->handshake_func(s);
-				if (i < 0) return(i);
-				if (i == 0)
-					{
-					SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-					return(-1);
-					}
-
-				if (!(s->mode & SSL_MODE_AUTO_RETRY))
-					{
-					if (s->s3->rbuf.left == 0) /* no read-ahead left? */
-						{
-						BIO *bio;
-						/* In the case where we try to read application data,
-						 * but we trigger an SSL handshake, we return -1 with
-						 * the retry option set.  Otherwise renegotiation may
-						 * cause nasty problems in the blocking world */
-						s->rwstate=SSL_READING;
-						bio=SSL_get_rbio(s);
-						BIO_clear_retry_flags(bio);
-						BIO_set_retry_read(bio);
-						return(-1);
-						}
-					}
-				}
-			}
-		/* we either finished a handshake or ignored the request,
-		 * now try again to obtain the (application) data we were asked for */
-		goto start;
-		}
-	/* If we are a server and get a client hello when renegotiation isn't
-	 * allowed send back a no renegotiation alert and carry on.
-	 * WARNING: experimental code, needs reviewing (steve)
-	 */
-	if (s->server &&
-		SSL_is_init_finished(s) &&
-    		!s->s3->send_connection_binding &&
-		(s->version > SSL3_VERSION) &&
-		(s->s3->handshake_fragment_len >= 4) &&
-		(s->s3->handshake_fragment[0] == SSL3_MT_CLIENT_HELLO) &&
-		(s->session != NULL) && (s->session->cipher != NULL) &&
-		!(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
-		
-		{
-		/*s->s3->handshake_fragment_len = 0;*/
-		rr->length = 0;
-		ssl3_send_alert(s,SSL3_AL_WARNING, SSL_AD_NO_RENEGOTIATION);
-		goto start;
-		}
-	if (s->s3->alert_fragment_len >= 2)
-		{
-		int alert_level = s->s3->alert_fragment[0];
-		int alert_descr = s->s3->alert_fragment[1];
-
-		s->s3->alert_fragment_len = 0;
-
-		if (s->msg_callback)
-			s->msg_callback(0, s->version, SSL3_RT_ALERT, s->s3->alert_fragment, 2, s, s->msg_callback_arg);
-
-		if (s->info_callback != NULL)
-			cb=s->info_callback;
-		else if (s->ctx->info_callback != NULL)
-			cb=s->ctx->info_callback;
-
-		if (cb != NULL)
-			{
-			j = (alert_level << 8) | alert_descr;
-			cb(s, SSL_CB_READ_ALERT, j);
-			}
-
-		if (alert_level == 1) /* warning */
-			{
-			s->s3->warn_alert = alert_descr;
-			if (alert_descr == SSL_AD_CLOSE_NOTIFY)
-				{
-				s->shutdown |= SSL_RECEIVED_SHUTDOWN;
-				return(0);
-				}
-			/* This is a warning but we receive it if we requested
-			 * renegotiation and the peer denied it. Terminate with
-			 * a fatal alert because if application tried to
-			 * renegotiatie it presumably had a good reason and
-			 * expects it to succeed.
-			 *
-			 * In future we might have a renegotiation where we
-			 * don't care if the peer refused it where we carry on.
-			 */
-			else if (alert_descr == SSL_AD_NO_RENEGOTIATION)
-				{
-				al = SSL_AD_HANDSHAKE_FAILURE;
-				SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_NO_RENEGOTIATION);
-				goto f_err;
-				}
-#ifdef SSL_AD_MISSING_SRP_USERNAME
-			else if (alert_descr == SSL_AD_MISSING_SRP_USERNAME)
-				return(0);
-#endif
-			}
-		else if (alert_level == 2) /* fatal */
-			{
-			char tmp[16];
-
-			s->rwstate=SSL_NOTHING;
-			s->s3->fatal_alert = alert_descr;
-			SSLerr(SSL_F_SSL3_READ_BYTES, SSL_AD_REASON_OFFSET + alert_descr);
-			BIO_snprintf(tmp,sizeof tmp,"%d",alert_descr);
-			ERR_add_error_data(2,"SSL alert number ",tmp);
-			s->shutdown|=SSL_RECEIVED_SHUTDOWN;
-			SSL_CTX_remove_session(s->ctx,s->session);
-			return(0);
-			}
-		else
-			{
-			al=SSL_AD_ILLEGAL_PARAMETER;
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNKNOWN_ALERT_TYPE);
-			goto f_err;
-			}
-
-		goto start;
-		}
-
-	if (s->shutdown & SSL_SENT_SHUTDOWN) /* but we have not received a shutdown */
-		{
-		s->rwstate=SSL_NOTHING;
-		rr->length=0;
-		return(0);
-		}
-
-	if (rr->type == SSL3_RT_CHANGE_CIPHER_SPEC)
-		{
-		/* 'Change Cipher Spec' is just a single byte, so we know
-		 * exactly what the record payload has to look like */
-		if (	(rr->length != 1) || (rr->off != 0) ||
-			(rr->data[0] != SSL3_MT_CCS))
-			{
-			al=SSL_AD_ILLEGAL_PARAMETER;
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_BAD_CHANGE_CIPHER_SPEC);
-			goto f_err;
-			}
-
-		/* Check we have a cipher to change to */
-		if (s->s3->tmp.new_cipher == NULL)
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_CCS_RECEIVED_EARLY);
-			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)
-			s->msg_callback(0, s->version, SSL3_RT_CHANGE_CIPHER_SPEC, rr->data, 1, s, s->msg_callback_arg);
-
-		s->s3->change_cipher_spec=1;
-		if (!ssl3_do_change_cipher_spec(s))
-			goto err;
-		else
-			goto start;
-		}
-
-	/* Unexpected handshake message (Client Hello, or protocol violation) */
-	if ((s->s3->handshake_fragment_len >= 4) &&	!s->in_handshake)
-		{
-		if (((s->state&SSL_ST_MASK) == SSL_ST_OK) &&
-			!(s->s3->flags & SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS))
-			{
-#if 0 /* worked only because C operator preferences are not as expected (and
-       * because this is not really needed for clients except for detecting
-       * protocol violations): */
-			s->state=SSL_ST_BEFORE|(s->server)
-				?SSL_ST_ACCEPT
-				:SSL_ST_CONNECT;
-#else
-			s->state = s->server ? SSL_ST_ACCEPT : SSL_ST_CONNECT;
-#endif
-			s->renegotiate=1;
-			s->new_session=1;
-			}
-		i=s->handshake_func(s);
-		if (i < 0) return(i);
-		if (i == 0)
-			{
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_SSL_HANDSHAKE_FAILURE);
-			return(-1);
-			}
-
-		if (!(s->mode & SSL_MODE_AUTO_RETRY))
-			{
-			if (s->s3->rbuf.left == 0) /* no read-ahead left? */
-				{
-				BIO *bio;
-				/* In the case where we try to read application data,
-				 * but we trigger an SSL handshake, we return -1 with
-				 * the retry option set.  Otherwise renegotiation may
-				 * cause nasty problems in the blocking world */
-				s->rwstate=SSL_READING;
-				bio=SSL_get_rbio(s);
-				BIO_clear_retry_flags(bio);
-				BIO_set_retry_read(bio);
-				return(-1);
-				}
-			}
-		goto start;
-		}
-
-	switch (rr->type)
-		{
-	default:
-#ifndef OPENSSL_NO_TLS
-		/* TLS up to v1.1 just ignores unknown message types:
-		 * TLS v1.2 give an unexpected message alert.
-		 */
-		if (s->version >= TLS1_VERSION && s->version <= TLS1_1_VERSION)
-			{
-			rr->length = 0;
-			goto start;
-			}
-#endif
-		al=SSL_AD_UNEXPECTED_MESSAGE;
-		SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
-		goto f_err;
-	case SSL3_RT_CHANGE_CIPHER_SPEC:
-	case SSL3_RT_ALERT:
-	case SSL3_RT_HANDSHAKE:
-		/* we already handled all of these, with the possible exception
-		 * of SSL3_RT_HANDSHAKE when s->in_handshake is set, but that
-		 * should not happen when type != rr->type */
-		al=SSL_AD_UNEXPECTED_MESSAGE;
-		SSLerr(SSL_F_SSL3_READ_BYTES,ERR_R_INTERNAL_ERROR);
-		goto f_err;
-	case SSL3_RT_APPLICATION_DATA:
-		/* At this point, we were expecting handshake data,
-		 * but have application data.  If the library was
-		 * running inside ssl3_read() (i.e. in_read_app_data
-		 * is set) and it makes sense to read application data
-		 * at this point (session renegotiation not yet started),
-		 * we will indulge it.
-		 */
-		if (s->s3->in_read_app_data &&
-			(s->s3->total_renegotiations != 0) &&
-			((
-				(s->state & SSL_ST_CONNECT) &&
-				(s->state >= SSL3_ST_CW_CLNT_HELLO_A) &&
-				(s->state <= SSL3_ST_CR_SRVR_HELLO_A)
-				) || (
-					(s->state & SSL_ST_ACCEPT) &&
-					(s->state <= SSL3_ST_SW_HELLO_REQ_A) &&
-					(s->state >= SSL3_ST_SR_CLNT_HELLO_A)
-					)
-				))
-			{
-			s->s3->in_read_app_data=2;
-			return(-1);
-			}
-		else
-			{
-			al=SSL_AD_UNEXPECTED_MESSAGE;
-			SSLerr(SSL_F_SSL3_READ_BYTES,SSL_R_UNEXPECTED_RECORD);
-			goto f_err;
-			}
-		}
-	/* not reached */
-
-f_err:
-	ssl3_send_alert(s,SSL3_AL_FATAL,al);
-err:
-	return(-1);
-	}
-
-int ssl3_do_change_cipher_spec(SSL *s)
-	{
-	int i;
-	const char *sender;
-	int slen;
-
-	if (s->state & SSL_ST_ACCEPT)
-		i=SSL3_CHANGE_CIPHER_SERVER_READ;
-	else
-		i=SSL3_CHANGE_CIPHER_CLIENT_READ;
-
-	if (s->s3->tmp.key_block == 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);
-			return (0);
-			}
-
-		s->session->cipher=s->s3->tmp.new_cipher;
-		if (!s->method->ssl3_enc->setup_key_block(s)) return(0);
-		}
-
-	if (!s->method->ssl3_enc->change_cipher_state(s,i))
-		return(0);
-
-	/* we have to record the message digest at
-	 * this point so we can get it before we read
-	 * the finished message */
-	if (s->state & SSL_ST_CONNECT)
-		{
-		sender=s->method->ssl3_enc->server_finished_label;
-		slen=s->method->ssl3_enc->server_finished_label_len;
-		}
-	else
-		{
-		sender=s->method->ssl3_enc->client_finished_label;
-		slen=s->method->ssl3_enc->client_finished_label_len;
-		}
-
-	s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
-		sender,slen,s->s3->tmp.peer_finish_md);
-
-	return(1);
-	}
-
-int ssl3_send_alert(SSL *s, int level, int desc)
-	{
-	/* Map tls/ssl alert value to correct one */
-	desc=s->method->ssl3_enc->alert_value(desc);
-	if (s->version == SSL3_VERSION && desc == SSL_AD_PROTOCOL_VERSION)
-		desc = SSL_AD_HANDSHAKE_FAILURE; /* SSL 3.0 does not have protocol_version alerts */
-	if (desc < 0) return -1;
-	/* If a fatal one, remove from cache */
-	if ((level == 2) && (s->session != NULL))
-		SSL_CTX_remove_session(s->ctx,s->session);
-
-	s->s3->alert_dispatch=1;
-	s->s3->send_alert[0]=level;
-	s->s3->send_alert[1]=desc;
-	if (s->s3->wbuf.left == 0) /* data still being written out? */
-		return s->method->ssl_dispatch_alert(s);
-	/* else data is still being written out, we will get written
-	 * some time in the future */
-	return -1;
-	}
-
-int ssl3_dispatch_alert(SSL *s)
-	{
-	int i,j;
-	void (*cb)(const SSL *ssl,int type,int val)=NULL;
-
-	s->s3->alert_dispatch=0;
-	i = do_ssl3_write(s, SSL3_RT_ALERT, &s->s3->send_alert[0], 2, 0);
-	if (i <= 0)
-		{
-		s->s3->alert_dispatch=1;
-		}
-	else
-		{
-		/* Alert sent to BIO.  If it is important, flush it now.
-		 * If the message does not get sent due to non-blocking IO,
-		 * we will not worry too much. */
-		if (s->s3->send_alert[0] == SSL3_AL_FATAL)
-			(void)BIO_flush(s->wbio);
-
-		if (s->msg_callback)
-			s->msg_callback(1, s->version, SSL3_RT_ALERT, s->s3->send_alert, 2, s, s->msg_callback_arg);
-
-		if (s->info_callback != NULL)
-			cb=s->info_callback;
-		else if (s->ctx->info_callback != NULL)
-			cb=s->ctx->info_callback;
-
-		if (cb != NULL)
-			{
-			j=(s->s3->send_alert[0]<<8)|s->s3->send_alert[1];
-			cb(s,SSL_CB_WRITE_ALERT,j);
-			}
-		}
-	return(i);
-	}