ssl/s3_both.c - third_party/openssl - Git at Google

 /* ssl/s3_both.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.]
  */

 #include <stdio.h>
 #include "buffer.h"
 #include "rand.h"
 #include "objects.h"
 #include "evp.h"
 #include "x509.h"
 #include "ssl_locl.h"

 #define BREAK	break

 /* SSL3err(SSL_F_SSL3_GET_FINISHED,SSL_R_EXCESSIVE_MESSAGE_SIZE);
  */

 int ssl3_send_finished(SSL *s, int a, int b, unsigned char *sender,
 	     int slen)
 	{
 	unsigned char *p,*d;
 	int i;
 	unsigned long l;

 	if (s->state == a)
 		{
 		d=(unsigned char *)s->init_buf->data;
 		p= &(d[4]);

 		i=s->method->ssl3_enc->final_finish_mac(s,
 			&(s->s3->finish_dgst1),
 			&(s->s3->finish_dgst2),
 			sender,slen,p);
 		p+=i;
 		l=i;

 #ifdef WIN16
 		/* MSVC 1.5 does not clear the top bytes of the word unless
 		 * I do this.
 		 */
 		l&=0xffff;
 #endif

 		*(d++)=SSL3_MT_FINISHED;
 		l2n3(l,d);
 		s->init_num=(int)l+4;
 		s->init_off=0;

 		s->state=b;
 		}

 	/* SSL3_ST_SEND_xxxxxx_HELLO_B */
 	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 	}

 int ssl3_get_finished(SSL *s, int a, int b)
 	{
 	int al,i,ok;
 	long n;
 	unsigned char *p;

 	/* the mac has already been generated when we received the
 	 * change cipher spec message and is in s->s3->tmp.in_dgst[12]
 	 */

 	n=ssl3_get_message(s,
 		a,
 		b,
 		SSL3_MT_FINISHED,
 		64, /* should actually be 36+4 :-) */
 		&ok);

 	if (!ok) return((int)n);

 	/* If this occurs if we has missed a message */
 	if (!s->s3->change_cipher_spec)
 		{
 		al=SSL_AD_UNEXPECTED_MESSAGE;
 		SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 		goto f_err;
 		}
 	s->s3->change_cipher_spec=0;

 	p=(unsigned char *)s->init_buf->data;

 	i=s->method->ssl3_enc->finish_mac_length;

 	if (i != n)
 		{
 		al=SSL_AD_DECODE_ERROR;
 		SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
 		goto f_err;
 		}

 	if (memcmp(  p,    (char *)&(s->s3->tmp.finish_md[0]),i) != 0)
 		{
 		al=SSL_AD_DECRYPT_ERROR;
 		SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
 		goto f_err;
 		}

 	return(1);
 f_err:
 	ssl3_send_alert(s,SSL3_AL_FATAL,al);
 	return(0);
 	}

 /* for these 2 messages, we need to
  * ssl->enc_read_ctx			re-init
  * ssl->s3->read_sequence		zero
  * ssl->s3->read_mac_secret		re-init
  * ssl->session->read_sym_enc		assign
  * ssl->session->read_compression	assign
  * ssl->session->read_hash		assign
  */
 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 	{
 	unsigned char *p;

 	if (s->state == a)
 		{
 		p=(unsigned char *)s->init_buf->data;
 		*p=SSL3_MT_CCS;
 		s->init_num=1;
 		s->init_off=0;

 		s->state=b;
 		}

 	/* SSL3_ST_CW_CHANGE_B */
 	return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 	}

 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 	{
 	unsigned char *p;
 	int n,i;
 	unsigned long l=7;
 	BUF_MEM *buf;
 	X509_STORE_CTX xs_ctx;
 	X509_OBJECT obj;

 	/* TLSv1 sends a chain with nothing in it, instead of an alert */
 	buf=s->init_buf;
 	if (!BUF_MEM_grow(buf,(int)(10)))
 		{
 		SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 		return(0);
 		}
 	if (x != NULL)
 		{
 		X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL);

 		for (;;)
 			{
 			n=i2d_X509(x,NULL);
 			if (!BUF_MEM_grow(buf,(int)(n+l+3)))
 				{
 				SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 				return(0);
 				}
 			p=(unsigned char *)&(buf->data[l]);
 			l2n3(n,p);
 			i2d_X509(x,&p);
 			l+=n+3;
 			if (X509_NAME_cmp(X509_get_subject_name(x),
 				X509_get_issuer_name(x)) == 0) break;

 			i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
 				X509_get_issuer_name(x),&obj);
 			if (i <= 0) break;
 			x=obj.data.x509;
 			/* Count is one too high since the X509_STORE_get uped the
 			 * ref count */
 			X509_free(x);
 			}

 		X509_STORE_CTX_cleanup(&xs_ctx);
 		}

 	/* Thawte special :-) */
 	if (s->ctx->extra_certs != NULL)
 	for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 		{
 		x=sk_X509_value(s->ctx->extra_certs,i);
 		n=i2d_X509(x,NULL);
 		if (!BUF_MEM_grow(buf,(int)(n+l+3)))
 			{
 			SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 			return(0);
 			}
 		p=(unsigned char *)&(buf->data[l]);
 		l2n3(n,p);
 		i2d_X509(x,&p);
 		l+=n+3;
 		}

 	l-=7;
 	p=(unsigned char *)&(buf->data[4]);
 	l2n3(l,p);
 	l+=3;
 	p=(unsigned char *)&(buf->data[0]);
 	*(p++)=SSL3_MT_CERTIFICATE;
 	l2n3(l,p);
 	l+=4;
 	return(l);
 	}

 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 	{
 	unsigned char *p;
 	unsigned long l;
 	long n;
 	int i,al;

 	if (s->s3->tmp.reuse_message)
 		{
 		s->s3->tmp.reuse_message=0;
 		if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 			{
 			al=SSL_AD_UNEXPECTED_MESSAGE;
 			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 			goto f_err;
 			}
 		*ok=1;
 		return((int)s->s3->tmp.message_size);
 		}

 	p=(unsigned char *)s->init_buf->data;

 	if (s->state == st1)
 		{
 		i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
 				  4-s->init_num);
 		if (i < (4-s->init_num))
 			{
 			*ok=0;
 			return(ssl3_part_read(s,i));
 			}

 		if ((mt >= 0) && (*p != mt))
 			{
 			al=SSL_AD_UNEXPECTED_MESSAGE;
 			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 			goto f_err;
 			}
 		s->s3->tmp.message_type= *(p++);

 		n2l3(p,l);
 		if (l > (unsigned long)max)
 			{
 			al=SSL_AD_ILLEGAL_PARAMETER;
 			SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 			goto f_err;
 			}
 		if (l && !BUF_MEM_grow(s->init_buf,(int)l))
 			{
 			SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 			goto err;
 			}
 		s->s3->tmp.message_size=l;
 		s->state=stn;

 		s->init_num=0;
 		}

 	/* next state (stn) */
 	p=(unsigned char *)s->init_buf->data;
 	n=s->s3->tmp.message_size;
 	if (n > 0)
 		{
 		i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n);
 		if (i != (int)n)
 			{
 			*ok=0;
 			return(ssl3_part_read(s,i));
 			}
 		}
 	*ok=1;
 	return(n);
 f_err:
 	ssl3_send_alert(s,SSL3_AL_FATAL,al);
 err:
 	*ok=0;
 	return(-1);
 	}

 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 	{
 	EVP_PKEY *pk;
 	int ret= -1,i,j;

 	if (pkey == NULL)
 		pk=X509_get_pubkey(x);
 	else
 		pk=pkey;
 	if (pk == NULL) goto err;

 	i=pk->type;
 	if (i == EVP_PKEY_RSA)
 		{
 		ret=SSL_PKEY_RSA_ENC;
 		if (x != NULL)
 			{
 			j=X509_get_ext_count(x);
 			/* check to see if this is a signing only certificate */
 			/* EAY EAY EAY EAY */
 			}
 		}
 	else if (i == EVP_PKEY_DSA)
 		{
 		ret=SSL_PKEY_DSA_SIGN;
 		}
 	else if (i == EVP_PKEY_DH)
 		{
 		/* if we just have a key, we needs to be guess */

 		if (x == NULL)
 			ret=SSL_PKEY_DH_DSA;
 		else
 			{
 			j=X509_get_signature_type(x);
 			if (j == EVP_PKEY_RSA)
 				ret=SSL_PKEY_DH_RSA;
 			else if (j== EVP_PKEY_DSA)
 				ret=SSL_PKEY_DH_DSA;
 			else ret= -1;
 			}
 		}
 	else
 		ret= -1;

 err:
 	if(!pkey) EVP_PKEY_free(pk);
 	return(ret);
 	}

 int ssl_verify_alarm_type(long type)
 	{
 	int al;

 	switch(type)
 		{
 	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 	case X509_V_ERR_UNABLE_TO_GET_CRL:
 		al=SSL_AD_UNKNOWN_CA;
 		break;
 	case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 	case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 	case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 	case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 	case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 	case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 	case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 	case X509_V_ERR_CERT_NOT_YET_VALID:
 	case X509_V_ERR_CRL_NOT_YET_VALID:
 		al=SSL_AD_BAD_CERTIFICATE;
 		break;
 	case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 	case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 		al=SSL_AD_DECRYPT_ERROR;
 		break;
 	case X509_V_ERR_CERT_HAS_EXPIRED:
 	case X509_V_ERR_CRL_HAS_EXPIRED:
 		al=SSL_AD_CERTIFICATE_EXPIRED;
 		break;
 	case X509_V_ERR_CERT_REVOKED:
 		al=SSL_AD_CERTIFICATE_REVOKED;
 		break;
 	case X509_V_ERR_OUT_OF_MEM:
 		al=SSL_AD_INTERNAL_ERROR;
 		break;
 	case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 	case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 	case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 	case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 		al=SSL_AD_UNKNOWN_CA;
 		break;
 	case X509_V_ERR_APPLICATION_VERIFICATION:
 		al=SSL_AD_HANDSHAKE_FAILURE;
 		break;
 	default:
 		al=SSL_AD_CERTIFICATE_UNKNOWN;
 		break;
 		}
 	return(al);
 	}

 int ssl3_setup_buffers(SSL *s)
 	{
 	unsigned char *p;
 	unsigned int extra;

 	if (s->s3->rbuf.buf == NULL)
 		{
 		if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 			extra=SSL3_RT_MAX_EXTRA;
 		else
 			extra=0;
 		if ((p=(unsigned char *)Malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
 			== NULL)
 			goto err;
 		s->s3->rbuf.buf=p;
 		}

 	if (s->s3->wbuf.buf == NULL)
 		{
 		if ((p=(unsigned char *)Malloc(SSL3_RT_MAX_PACKET_SIZE))
 			== NULL)
 			goto err;
 		s->s3->wbuf.buf=p;
 		}
 	s->packet= &(s->s3->rbuf.buf[0]);
 	return(1);
 err:
 	SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
 	return(0);
 	}
	/* ssl/s3_both.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.]
	*/

	#include <stdio.h>
	#include "buffer.h"
	#include "rand.h"
	#include "objects.h"
	#include "evp.h"
	#include "x509.h"
	#include "ssl_locl.h"

	#define BREAK break

	/* SSL3err(SSL_F_SSL3_GET_FINISHED,SSL_R_EXCESSIVE_MESSAGE_SIZE);
	*/

	int ssl3_send_finished(SSL s, int a, int b, unsigned char sender,
	int slen)
	{
	unsigned char p,d;
	int i;
	unsigned long l;

	if (s->state == a)
	{
	d=(unsigned char *)s->init_buf->data;
	p= &(d[4]);

	i=s->method->ssl3_enc->final_finish_mac(s,
	&(s->s3->finish_dgst1),
	&(s->s3->finish_dgst2),
	sender,slen,p);
	p+=i;
	l=i;

	#ifdef WIN16
	/* MSVC 1.5 does not clear the top bytes of the word unless
	* I do this.
	*/
	l&=0xffff;
	#endif

	*(d++)=SSL3_MT_FINISHED;
	l2n3(l,d);
	s->init_num=(int)l+4;
	s->init_off=0;

	s->state=b;
	}

	/* SSL3_ST_SEND_xxxxxx_HELLO_B */
	return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
	}

	int ssl3_get_finished(SSL *s, int a, int b)
	{
	int al,i,ok;
	long n;
	unsigned char *p;

	/* the mac has already been generated when we received the
	* change cipher spec message and is in s->s3->tmp.in_dgst[12]
	*/

	n=ssl3_get_message(s,
	a,
	b,
	SSL3_MT_FINISHED,
	64, /* should actually be 36+4 :-) */
	&ok);

	if (!ok) return((int)n);

	/* If this occurs if we has missed a message */
	if (!s->s3->change_cipher_spec)
	{
	al=SSL_AD_UNEXPECTED_MESSAGE;
	SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
	goto f_err;
	}
	s->s3->change_cipher_spec=0;

	p=(unsigned char *)s->init_buf->data;

	i=s->method->ssl3_enc->finish_mac_length;

	if (i != n)
	{
	al=SSL_AD_DECODE_ERROR;
	SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
	goto f_err;
	}

	if (memcmp( p, (char *)&(s->s3->tmp.finish_md[0]),i) != 0)
	{
	al=SSL_AD_DECRYPT_ERROR;
	SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
	goto f_err;
	}

	return(1);
	f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
	return(0);
	}

	/* for these 2 messages, we need to
	* ssl->enc_read_ctx re-init
	* ssl->s3->read_sequence zero
	* ssl->s3->read_mac_secret re-init
	* ssl->session->read_sym_enc assign
	* ssl->session->read_compression assign
	* ssl->session->read_hash assign
	*/
	int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
	{
	unsigned char *p;

	if (s->state == a)
	{
	p=(unsigned char *)s->init_buf->data;
	*p=SSL3_MT_CCS;
	s->init_num=1;
	s->init_off=0;

	s->state=b;
	}

	/* SSL3_ST_CW_CHANGE_B */
	return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
	}

	unsigned long ssl3_output_cert_chain(SSL s, X509 x)
	{
	unsigned char *p;
	int n,i;
	unsigned long l=7;
	BUF_MEM *buf;
	X509_STORE_CTX xs_ctx;
	X509_OBJECT obj;

	/* TLSv1 sends a chain with nothing in it, instead of an alert */
	buf=s->init_buf;
	if (!BUF_MEM_grow(buf,(int)(10)))
	{
	SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
	return(0);
	}
	if (x != NULL)
	{
	X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL);

	for (;;)
	{
	n=i2d_X509(x,NULL);
	if (!BUF_MEM_grow(buf,(int)(n+l+3)))
	{
	SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
	return(0);
	}
	p=(unsigned char *)&(buf->data[l]);
	l2n3(n,p);
	i2d_X509(x,&p);
	l+=n+3;
	if (X509_NAME_cmp(X509_get_subject_name(x),
	X509_get_issuer_name(x)) == 0) break;

	i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
	X509_get_issuer_name(x),&obj);
	if (i <= 0) break;
	x=obj.data.x509;
	/* Count is one too high since the X509_STORE_get uped the
	* ref count */
	X509_free(x);
	}

	X509_STORE_CTX_cleanup(&xs_ctx);
	}

	/* Thawte special :-) */
	if (s->ctx->extra_certs != NULL)
	for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
	{
	x=sk_X509_value(s->ctx->extra_certs,i);
	n=i2d_X509(x,NULL);
	if (!BUF_MEM_grow(buf,(int)(n+l+3)))
	{
	SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
	return(0);
	}
	p=(unsigned char *)&(buf->data[l]);
	l2n3(n,p);
	i2d_X509(x,&p);
	l+=n+3;
	}

	l-=7;
	p=(unsigned char *)&(buf->data[4]);
	l2n3(l,p);
	l+=3;
	p=(unsigned char *)&(buf->data[0]);
	*(p++)=SSL3_MT_CERTIFICATE;
	l2n3(l,p);
	l+=4;
	return(l);
	}

	long ssl3_get_message(SSL s, int st1, int stn, int mt, long max, int ok)
	{
	unsigned char *p;
	unsigned long l;
	long n;
	int i,al;

	if (s->s3->tmp.reuse_message)
	{
	s->s3->tmp.reuse_message=0;
	if ((mt >= 0) && (s->s3->tmp.message_type != mt))
	{
	al=SSL_AD_UNEXPECTED_MESSAGE;
	SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
	goto f_err;
	}
	*ok=1;
	return((int)s->s3->tmp.message_size);
	}

	p=(unsigned char *)s->init_buf->data;

	if (s->state == st1)
	{
	i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
	4-s->init_num);
	if (i < (4-s->init_num))
	{
	*ok=0;
	return(ssl3_part_read(s,i));
	}

	if ((mt >= 0) && (*p != mt))
	{
	al=SSL_AD_UNEXPECTED_MESSAGE;
	SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
	goto f_err;
	}
	s->s3->tmp.message_type= *(p++);

	n2l3(p,l);
	if (l > (unsigned long)max)
	{
	al=SSL_AD_ILLEGAL_PARAMETER;
	SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
	goto f_err;
	}
	if (l && !BUF_MEM_grow(s->init_buf,(int)l))
	{
	SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
	goto err;
	}
	s->s3->tmp.message_size=l;
	s->state=stn;

	s->init_num=0;
	}

	/* next state (stn) */
	p=(unsigned char *)s->init_buf->data;
	n=s->s3->tmp.message_size;
	if (n > 0)
	{
	i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n);
	if (i != (int)n)
	{
	*ok=0;
	return(ssl3_part_read(s,i));
	}
	}
	*ok=1;
	return(n);
	f_err:
	ssl3_send_alert(s,SSL3_AL_FATAL,al);
	err:
	*ok=0;
	return(-1);
	}

	int ssl_cert_type(X509 x, EVP_PKEY pkey)
	{
	EVP_PKEY *pk;
	int ret= -1,i,j;

	if (pkey == NULL)
	pk=X509_get_pubkey(x);
	else
	pk=pkey;
	if (pk == NULL) goto err;

	i=pk->type;
	if (i == EVP_PKEY_RSA)
	{
	ret=SSL_PKEY_RSA_ENC;
	if (x != NULL)
	{
	j=X509_get_ext_count(x);
	/* check to see if this is a signing only certificate */
	/* EAY EAY EAY EAY */
	}
	}
	else if (i == EVP_PKEY_DSA)
	{
	ret=SSL_PKEY_DSA_SIGN;
	}
	else if (i == EVP_PKEY_DH)
	{
	/* if we just have a key, we needs to be guess */

	if (x == NULL)
	ret=SSL_PKEY_DH_DSA;
	else
	{
	j=X509_get_signature_type(x);
	if (j == EVP_PKEY_RSA)
	ret=SSL_PKEY_DH_RSA;
	else if (j== EVP_PKEY_DSA)
	ret=SSL_PKEY_DH_DSA;
	else ret= -1;
	}
	}
	else
	ret= -1;

	err:
	if(!pkey) EVP_PKEY_free(pk);
	return(ret);
	}

	int ssl_verify_alarm_type(long type)
	{
	int al;

	switch(type)
	{
	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
	case X509_V_ERR_UNABLE_TO_GET_CRL:
	al=SSL_AD_UNKNOWN_CA;
	break;
	case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
	case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
	case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
	case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
	case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
	case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
	case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
	case X509_V_ERR_CERT_NOT_YET_VALID:
	case X509_V_ERR_CRL_NOT_YET_VALID:
	al=SSL_AD_BAD_CERTIFICATE;
	break;
	case X509_V_ERR_CERT_SIGNATURE_FAILURE:
	case X509_V_ERR_CRL_SIGNATURE_FAILURE:
	al=SSL_AD_DECRYPT_ERROR;
	break;
	case X509_V_ERR_CERT_HAS_EXPIRED:
	case X509_V_ERR_CRL_HAS_EXPIRED:
	al=SSL_AD_CERTIFICATE_EXPIRED;
	break;
	case X509_V_ERR_CERT_REVOKED:
	al=SSL_AD_CERTIFICATE_REVOKED;
	break;
	case X509_V_ERR_OUT_OF_MEM:
	al=SSL_AD_INTERNAL_ERROR;
	break;
	case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
	case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
	case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
	case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
	case X509_V_ERR_CERT_CHAIN_TOO_LONG:
	al=SSL_AD_UNKNOWN_CA;
	break;
	case X509_V_ERR_APPLICATION_VERIFICATION:
	al=SSL_AD_HANDSHAKE_FAILURE;
	break;
	default:
	al=SSL_AD_CERTIFICATE_UNKNOWN;
	break;
	}
	return(al);
	}

	int ssl3_setup_buffers(SSL *s)
	{
	unsigned char *p;
	unsigned int extra;

	if (s->s3->rbuf.buf == NULL)
	{
	if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
	extra=SSL3_RT_MAX_EXTRA;
	else
	extra=0;
	if ((p=(unsigned char *)Malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
	== NULL)
	goto err;
	s->s3->rbuf.buf=p;
	}

	if (s->s3->wbuf.buf == NULL)
	{
	if ((p=(unsigned char *)Malloc(SSL3_RT_MAX_PACKET_SIZE))
	== NULL)
	goto err;
	s->s3->wbuf.buf=p;
	}
	s->packet= &(s->s3->rbuf.buf[0]);
	return(1);
	err:
	SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
	return(0);
	}