From: Bodo Möller <bodo@openssl.org>
Date: Thu, 13 May 1999 15:09:38 +0000 (+0000)
Subject: New structure type SESS_CERT used instead of CERT inside SSL_SESSION.
X-Git-Tag: OpenSSL_0_9_3beta1~86
X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff_plain;h=b56bce4fc72c99c1ac85ee7de4d0145fe026bb4e

New structure type SESS_CERT used instead of CERT inside SSL_SESSION.
While modifying the sources, I found some inconsistencies on the use of
s->cert vs. s->session->sess_cert; I don't know if those could
really have caused problems, but possibly this is a proper bug-fix
and not just a clean-up.
---

diff --git a/CHANGES b/CHANGES
index a3a90ddc39..b8c3eeddb8 100644
--- a/CHANGES
+++ b/CHANGES
@@ -50,11 +50,12 @@
      Changing settings for an SSL_CTX *ctx after having done s = SSL_new(ctx)
      does not influence s as it used to.
      
-     Projected further changes:
      In order to clean up things more thoroughly, inside SSL_SESSION
-     we should not use CERT any longer, but a new structure SESS_CERT
-     that holds per-session data, and CERT should hold only those
-     values that can have meaningful defaults in an SSL_CTX.
+     we don't use CERT any longer, but a new structure SESS_CERT
+     that holds per-session data (if available); currently, this is
+     the peer's certificate chain and, for clients, the server's certificate
+     and temporary key.  CERT holds only those values that can have
+     meaningful defaults in an SSL_CTX.
      [Bodo Moeller]
 
   *) New function X509V3_EXT_i2d() to create an X509_EXTENSION structure
diff --git a/apps/s_server.c b/apps/s_server.c
index 42ca408ce3..2341949517 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -158,6 +158,7 @@ extern int verify_depth;
 
 static char *cipher=NULL;
 static int s_server_verify=SSL_VERIFY_NONE;
+static int s_server_session_id_context = 1; /* anything will do */
 static char *s_cert_file=TEST_CERT,*s_key_file=NULL;
 static char *s_dcert_file=NULL,*s_dkey_file=NULL;
 #ifdef FIONBIO
@@ -521,6 +522,8 @@ bad:
 	if (cipher != NULL)
 		SSL_CTX_set_cipher_list(ctx,cipher);
 	SSL_CTX_set_verify(ctx,s_server_verify,verify_callback);
+	SSL_CTX_set_session_id_context(ctx,(void*)&s_server_session_id_context,
+		sizeof s_server_session_id_context);
 
 	SSL_CTX_set_client_CA_list(ctx,SSL_load_client_CA_file(CAfile));
 
diff --git a/crypto/crypto.h b/crypto/crypto.h
index 4345200f18..0582759e76 100644
--- a/crypto/crypto.h
+++ b/crypto/crypto.h
@@ -98,13 +98,14 @@ extern "C" {
 #define	CRYPTO_LOCK_SSL_CTX		12
 #define	CRYPTO_LOCK_SSL_CERT		13
 #define	CRYPTO_LOCK_SSL_SESSION		14
-#define	CRYPTO_LOCK_SSL			15
-#define	CRYPTO_LOCK_RAND		16
-#define	CRYPTO_LOCK_MALLOC		17
-#define	CRYPTO_LOCK_BIO			18
-#define	CRYPTO_LOCK_BIO_GETHOSTBYNAME	19
-#define CRYPTO_LOCK_RSA_BLINDING	20
-#define	CRYPTO_NUM_LOCKS		21
+#define	CRYPTO_LOCK_SSL_SESS_CERT	15
+#define	CRYPTO_LOCK_SSL			16
+#define	CRYPTO_LOCK_RAND		17
+#define	CRYPTO_LOCK_MALLOC		18
+#define	CRYPTO_LOCK_BIO			19
+#define	CRYPTO_LOCK_BIO_GETHOSTBYNAME	20
+#define	CRYPTO_LOCK_RSA_BLINDING	21
+#define	CRYPTO_NUM_LOCKS		22
 
 #define CRYPTO_LOCK		1
 #define CRYPTO_UNLOCK		2
diff --git a/ssl/s2_clnt.c b/ssl/s2_clnt.c
index 0f188ecaa4..1fe8bd627d 100644
--- a/ssl/s2_clnt.c
+++ b/ssl/s2_clnt.c
@@ -72,7 +72,7 @@ static int client_hello(SSL *s);
 static int client_master_key(SSL *s);
 static int client_finished(SSL *s);
 static int client_certificate(SSL *s);
-static int ssl_rsa_public_encrypt(CERT *c, int len, unsigned char *from,
+static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
 	unsigned char *to,int padding);
 #define BREAK	break
 
@@ -431,9 +431,10 @@ static int get_server_hello(SSL *s)
 		s->session->cipher=sk_SSL_CIPHER_value(cl,i);
 		}
 
-	if ((s->session != NULL) && (s->session->peer != NULL))
+	if (s->session->peer != NULL)
 		X509_free(s->session->peer);
 
+#if 0 /* What is all this meant to accomplish?? */
 	/* hmmm, can we have the problem of the other session with this
 	 * cert, Free's it before we increment the reference count. */
 	CRYPTO_w_lock(CRYPTO_LOCK_X509);
@@ -442,6 +443,11 @@ static int get_server_hello(SSL *s)
 	/*CRYPTO_add(&s->session->peer->references,1,CRYPTO_LOCK_X509);*/
 	s->session->peer->references++;
 	CRYPTO_w_unlock(CRYPTO_LOCK_X509);
+#else
+	s->session->peer = s->session->sess_cert->peer_key->x509;
+    /* peer_key->x509 has been set by ssl2_set_certificate. */
+	CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
+#endif
 
 	s->s2->conn_id_length=s->s2->tmp.conn_id_length;
 	memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
@@ -733,7 +739,7 @@ static int client_certificate(SSL *s)
 		EVP_SignUpdate(&ctx,s->s2->key_material,
 			(unsigned int)s->s2->key_material_length);
 		EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
-		n=i2d_X509(s->session->sess_cert->key->x509,&p);
+		n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
 		EVP_SignUpdate(&ctx,buf,(unsigned int)n);
 
 		p=buf;
@@ -874,7 +880,7 @@ int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data)
 	{
 	STACK_OF(X509) *sk=NULL;
 	EVP_PKEY *pkey=NULL;
-	CERT *c=NULL;
+	SESS_CERT *sc=NULL;
 	int i;
 	X509 *x509=NULL;
 	int ret=0;
@@ -900,22 +906,18 @@ int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data)
 		goto err;
 		}
 
-	/* cert for ssl */
-	c=ssl_cert_new();
-	if (c == NULL)
+	/* server's cert for this session */
+	sc=ssl_sess_cert_new();
+	if (sc == NULL)
 		{
 		ret= -1;
 		goto err;
 		}
+	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
+	s->session->sess_cert=sc;
 
-	/* cert for session */
-	if (s->session->sess_cert) ssl_cert_free(s->session->sess_cert);
-	s->session->sess_cert=c;
-
-/*	c->cert_type=type; */
-
-	c->pkeys[SSL_PKEY_RSA_ENC].x509=x509;
-	c->key= &(c->pkeys[SSL_PKEY_RSA_ENC]);
+	sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
+	sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
 
 	pkey=X509_get_pubkey(x509);
 	x509=NULL;
@@ -930,7 +932,7 @@ int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data)
 		goto err;
 		}
 
-	if (!ssl_set_cert_type(c,SSL2_CT_X509_CERTIFICATE))
+	if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
 		goto err;
 	ret=1;
 err:
@@ -940,14 +942,14 @@ err:
 	return(ret);
 	}
 
-static int ssl_rsa_public_encrypt(CERT *c, int len, unsigned char *from,
+static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
 	     unsigned char *to, int padding)
 	{
 	EVP_PKEY *pkey=NULL;
 	int i= -1;
 
-	if ((c == NULL) || (c->key->x509 == NULL) ||
-		((pkey=X509_get_pubkey(c->key->x509)) == NULL))
+	if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
+		((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
 		{
 		SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
 		return(-1);
diff --git a/ssl/s2_srvr.c b/ssl/s2_srvr.c
index d5bf0dd62d..d283b22991 100644
--- a/ssl/s2_srvr.c
+++ b/ssl/s2_srvr.c
@@ -122,8 +122,7 @@ int ssl2_accept(SSL *s)
 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 	s->in_handshake++;
 
-	if (((s->session == NULL) || (s->session->sess_cert == NULL)) &&
-		(s->cert == NULL))
+	if (s->cert == NULL)
 		{
 		SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
 		return(-1);
@@ -376,7 +375,7 @@ static int get_client_master_key(SSL *s)
 	memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
 		(unsigned int)keya);
 
-	if (s->session->sess_cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
+	if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
 		{
 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
@@ -600,6 +599,30 @@ static int server_hello(SSL *s)
 		*(p++)=SSL2_MT_SERVER_HELLO;		/* type */
 		hit=s->hit;
 		*(p++)=(unsigned char)hit;
+#if 1
+		if (!hit)
+			{
+			if (s->session->sess_cert != NULL)
+				/* This can't really happen because get_client_hello
+				 * has called ssl_get_new_session, which does not set
+				 * sess_cert. */
+				ssl_sess_cert_free(s->session->sess_cert);
+			s->session->sess_cert = ssl_sess_cert_new();
+			if (s->session->sess_cert == NULL)
+				{
+				SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
+				return(-1);
+				}
+			}
+		/* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
+		 * depending on whether it survived in the internal cache
+		 * or was retrieved from an external cache.
+		 * If it is NULL, we cannot put any useful data in it anyway,
+		 * so we don't touch it.
+		 */
+
+#else /* That's what used to be done when cert_st and sess_cert_st were
+	   * the same. */
 		if (!hit)
 			{			/* else add cert to session */
 			CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
@@ -619,8 +642,9 @@ static int server_hello(SSL *s)
 				s->session->sess_cert=s->cert;
 				}
 			}
+#endif
 
-		if (s->session->sess_cert == NULL)
+		if (s->cert == NULL)
 			{
 			ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
 			SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
@@ -873,7 +897,7 @@ static int request_certificate(SSL *s)
 			(unsigned int)s->s2->key_material_length);
 		EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
 
-		i=i2d_X509(s->session->sess_cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
+		i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
 		buf2=(unsigned char *)Malloc((unsigned int)i);
 		if (buf2 == NULL)
 			{
@@ -881,7 +905,7 @@ static int request_certificate(SSL *s)
 			goto msg_end;
 			}
 		p2=buf2;
-		i=i2d_X509(s->session->sess_cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
+		i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
 		EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
 		Free(buf2);
 
diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c
index 98c1f1828c..de07ac76c9 100644
--- a/ssl/s3_clnt.c
+++ b/ssl/s3_clnt.c
@@ -679,7 +679,7 @@ static int ssl3_get_server_certificate(SSL *s)
 	X509 *x=NULL;
 	unsigned char *p,*d,*q;
 	STACK_OF(X509) *sk=NULL;
-	CERT *c;
+	SESS_CERT *sc;
 	EVP_PKEY *pkey=NULL;
 
 	n=ssl3_get_message(s,
@@ -764,13 +764,13 @@ static int ssl3_get_server_certificate(SSL *s)
 		goto f_err; 
 		}
 
-	c=ssl_cert_new();
-	if (c == NULL) goto err;
+	sc=ssl_sess_cert_new();
+	if (sc == NULL) goto err;
 
-	if (s->session->sess_cert) ssl_cert_free(s->session->sess_cert);
-	s->session->sess_cert=c;
+	if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
+	s->session->sess_cert=sc;
 
-	c->cert_chain=sk;
+	sc->cert_chain=sk;
 	x=sk_X509_value(sk,0);
 	sk=NULL;
 
@@ -793,14 +793,16 @@ static int ssl3_get_server_certificate(SSL *s)
 		goto f_err;
 		}
 
-	c->cert_type=i;
+	sc->peer_cert_type=i;
 	CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
-	if (c->pkeys[i].x509 != NULL)
-		X509_free(c->pkeys[i].x509);
-	c->pkeys[i].x509=x;
-	c->key= &(c->pkeys[i]);
-
-	if ((s->session != NULL) && (s->session->peer != NULL)) 
+	if (sc->peer_pkeys[i].x509 != NULL) /* Why would this ever happen?
+										 * We just created sc a couple of
+										 * lines ago. */
+		X509_free(sc->peer_pkeys[i].x509);
+	sc->peer_pkeys[i].x509=x;
+	sc->peer_key= &(sc->peer_pkeys[i]);
+
+	if (s->session->peer != NULL)
 		X509_free(s->session->peer);
 	CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
 	s->session->peer=x;
@@ -857,23 +859,23 @@ static int ssl3_get_key_exchange(SSL *s)
 	if (s->session->sess_cert != NULL)
 		{
 #ifndef NO_RSA
-		if (s->session->sess_cert->rsa_tmp != NULL)
+		if (s->session->sess_cert->peer_rsa_tmp != NULL)
 			{
-			RSA_free(s->session->sess_cert->rsa_tmp);
-			s->session->sess_cert->rsa_tmp=NULL;
+			RSA_free(s->session->sess_cert->peer_rsa_tmp);
+			s->session->sess_cert->peer_rsa_tmp=NULL;
 			}
 #endif
 #ifndef NO_DH
-		if (s->session->sess_cert->dh_tmp)
+		if (s->session->sess_cert->peer_dh_tmp)
 			{
-			DH_free(s->session->sess_cert->dh_tmp);
-			s->session->sess_cert->dh_tmp=NULL;
+			DH_free(s->session->sess_cert->peer_dh_tmp);
+			s->session->sess_cert->peer_dh_tmp=NULL;
 			}
 #endif
 		}
 	else
 		{
-		s->session->sess_cert=ssl_cert_new();
+		s->session->sess_cert=ssl_sess_cert_new();
 		}
 
 	param_len=0;
@@ -920,13 +922,13 @@ static int ssl3_get_key_exchange(SSL *s)
 
 		/* this should be because we are using an export cipher */
 		if (alg & SSL_aRSA)
-			pkey=X509_get_pubkey(s->session->sess_cert->pkeys[SSL_PKEY_RSA_ENC].x509);
+			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
 		else
 			{
 			SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_INTERNAL_ERROR);
 			goto err;
 			}
-		s->session->sess_cert->rsa_tmp=rsa;
+		s->session->sess_cert->peer_rsa_tmp=rsa;
 		}
 	else
 #endif
@@ -986,16 +988,16 @@ static int ssl3_get_key_exchange(SSL *s)
 
 #ifndef NO_RSA
 		if (alg & SSL_aRSA)
-			pkey=X509_get_pubkey(s->session->sess_cert->pkeys[SSL_PKEY_RSA_ENC].x509);
+			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
 		else
 #endif
 #ifndef NO_DSA
 		if (alg & SSL_aDSS)
-			pkey=X509_get_pubkey(s->session->sess_cert->pkeys[SSL_PKEY_DSA_SIGN].x509);
+			pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
 #endif
 		/* else anonymous DH, so no certificate or pkey. */
 
-		s->session->sess_cert->dh_tmp=dh;
+		s->session->sess_cert->peer_dh_tmp=dh;
 		dh=NULL;
 		}
 	else if ((alg & SSL_kDHr) || (alg & SSL_kDHd))
@@ -1311,11 +1313,11 @@ static int ssl3_send_client_key_exchange(SSL *s)
 			RSA *rsa;
 			unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
 
-			if (s->session->sess_cert->rsa_tmp != NULL)
-				rsa=s->session->sess_cert->rsa_tmp;
+			if (s->session->sess_cert->peer_rsa_tmp != NULL)
+				rsa=s->session->sess_cert->peer_rsa_tmp;
 			else
 				{
-				pkey=X509_get_pubkey(s->session->sess_cert->pkeys[SSL_PKEY_RSA_ENC].x509);
+				pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
 				if ((pkey == NULL) ||
 					(pkey->type != EVP_PKEY_RSA) ||
 					(pkey->pkey.rsa == NULL))
@@ -1368,8 +1370,8 @@ static int ssl3_send_client_key_exchange(SSL *s)
 			{
 			DH *dh_srvr,*dh_clnt;
 
-			if (s->session->sess_cert->dh_tmp != NULL)
-				dh_srvr=s->session->sess_cert->dh_tmp;
+			if (s->session->sess_cert->peer_dh_tmp != NULL)
+				dh_srvr=s->session->sess_cert->peer_dh_tmp;
 			else
 				{
 				/* we get them from the cert */
@@ -1597,7 +1599,7 @@ static int ssl3_check_cert_and_algorithm(SSL *s)
 	int i,idx;
 	long algs;
 	EVP_PKEY *pkey=NULL;
-	CERT *c;
+	SESS_CERT *sc;
 #ifndef NO_RSA
 	RSA *rsa;
 #endif
@@ -1605,9 +1607,9 @@ static int ssl3_check_cert_and_algorithm(SSL *s)
 	DH *dh;
 #endif
 
-	c=s->session->sess_cert;
+	sc=s->session->sess_cert;
 
-	if (c == NULL)
+	if (sc == NULL)
 		{
 		SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_INTERNAL_ERROR);
 		goto err;
@@ -1620,17 +1622,17 @@ static int ssl3_check_cert_and_algorithm(SSL *s)
 		return(1);
 
 #ifndef NO_RSA
-	rsa=s->session->sess_cert->rsa_tmp;
+	rsa=s->session->sess_cert->peer_rsa_tmp;
 #endif
 #ifndef NO_DH
-	dh=s->session->sess_cert->dh_tmp;
+	dh=s->session->sess_cert->peer_dh_tmp;
 #endif
 
 	/* This is the passed certificate */
 
-	idx=c->cert_type;
-	pkey=X509_get_pubkey(c->pkeys[idx].x509);
-	i=X509_certificate_type(c->pkeys[idx].x509,pkey);
+	idx=sc->peer_cert_type;
+	pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
+	i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
 	EVP_PKEY_free(pkey);
 
 	
diff --git a/ssl/s3_srvr.c b/ssl/s3_srvr.c
index e15d135c85..9d2debf00d 100644
--- a/ssl/s3_srvr.c
+++ b/ssl/s3_srvr.c
@@ -110,7 +110,6 @@ int ssl3_accept(SSL *s)
 	void (*cb)()=NULL;
 	long num1;
 	int ret= -1;
-	CERT *ct;
 	int new_state,state,skip=0;
 
 	RAND_seed(&Time,sizeof(Time));
@@ -126,17 +125,11 @@ int ssl3_accept(SSL *s)
 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
 	s->in_handshake++;
 
-#ifdef undef
-	/* FIX THIS EAY EAY EAY */
-	/* we don't actually need a cert, we just need a cert or a DH_tmp */
-	if (((s->session == NULL) || (s->session->sess_cert == NULL)) &&
-		(s->cert == NULL))
+	if (s->cert == NULL)
 		{
 		SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
-		ret= -1;
-		goto end;
+		return(-1);
 		}
-#endif
 
 	for (;;)
 		{
@@ -261,15 +254,6 @@ int ssl3_accept(SSL *s)
 		case SSL3_ST_SW_KEY_EXCH_A:
 		case SSL3_ST_SW_KEY_EXCH_B:
 			l=s->s3->tmp.new_cipher->algorithms;
-			if (s->session->sess_cert == NULL)
-				{
-				if (s->cert != NULL)
-					{
-					CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
-					s->session->sess_cert=s->cert;
-					}
-				}
-			ct=s->session->sess_cert;
 
 			/* clear this, it may get reset by
 			 * send_server_key_exchange */
@@ -283,9 +267,9 @@ int ssl3_accept(SSL *s)
 			if (s->s3->tmp.use_rsa_tmp
 			    || (l & (SSL_DH|SSL_kFZA))
 			    || ((l & SSL_kRSA)
-				&& (ct->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
+				&& (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL
 				    || (SSL_IS_EXPORT(l)
-					&& EVP_PKEY_size(ct->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
+					&& EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_EXPORT_PKEYLENGTH(l)
 					)
 				    )
 				)
@@ -898,7 +882,7 @@ static int ssl3_send_server_key_exchange(SSL *s)
 	if (s->state == SSL3_ST_SW_KEY_EXCH_A)
 		{
 		type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK;
-		cert=s->session->sess_cert;
+		cert=s->cert;
 
 		buf=s->init_buf;
 
@@ -1207,11 +1191,7 @@ static int ssl3_get_client_key_exchange(SSL *s)
 		/* FIX THIS UP EAY EAY EAY EAY */
 		if (s->s3->tmp.use_rsa_tmp)
 			{
-			if ((s->session->sess_cert != NULL) &&
-				(s->session->sess_cert->rsa_tmp != NULL))
-				rsa=s->session->sess_cert->rsa_tmp;
-			else if ((s->cert != NULL) &&
-				(s->cert->rsa_tmp != NULL))
+			if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL))
 				rsa=s->cert->rsa_tmp;
 			/* Don't do a callback because rsa_tmp should
 			 * be sent already */
@@ -1643,11 +1623,23 @@ static int ssl3_get_client_certificate(SSL *s)
 			}
 		}
 
-	/* This should not be needed */
-	if (s->session->peer != NULL)
+	if (s->session->peer != NULL) /* This should not be needed */
 		X509_free(s->session->peer);
 	s->session->peer=sk_X509_shift(sk);
 
+	/* With the current implementation, sess_cert will always be NULL
+	 * when we arrive here. */
+	if (s->session->sess_cert == NULL)
+		{
+		s->session->sess_cert = ssl_sess_cert_new();
+		if (s->session->sess_cert == NULL)
+			{
+			SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE);
+			goto err;
+			}
+		}
+	if (s->session->sess_cert->cert_chain != NULL)
+		sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free);
 	s->session->sess_cert->cert_chain=sk;
 
 	sk=NULL;
diff --git a/ssl/ssl.h b/ssl/ssl.h
index c0f95473c1..3d05809150 100644
--- a/ssl/ssl.h
+++ b/ssl/ssl.h
@@ -241,11 +241,10 @@ typedef struct ssl_session_st
 	int not_resumable;
 
 	/* The cert is the certificate used to establish this connection */
-	struct cert_st /* CERT */ *sess_cert;
-	/* XXX should be struct sess_cert_st *sess_cert */
+	struct sess_cert_st /* SESS_CERT */ *sess_cert;
 
 	/* This is the cert for the other end.
-	 * On clients, it will be the same as sess_cert->key->x509
+	 * On clients, it will be the same as sess_cert->peer_key->x509
 	 * (the latter is not enough as sess_cert is not retained
 	 * in the external representation of sessions, see ssl_asn1.c). */
 	X509 *peer;
@@ -1215,6 +1214,7 @@ int SSL_COMP_add_compression_method(int id,char *cm);
 #define SSL_F_SSL_RSA_PUBLIC_ENCRYPT			 188
 #define SSL_F_SSL_SESSION_NEW				 189
 #define SSL_F_SSL_SESSION_PRINT_FP			 190
+#define SSL_F_SSL_SESS_CERT_NEW				 225
 #define SSL_F_SSL_SET_CERT				 191
 #define SSL_F_SSL_SET_FD				 192
 #define SSL_F_SSL_SET_PKEY				 193
diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
index 3e5eba7605..9a752c3d20 100644
--- a/ssl/ssl_cert.c
+++ b/ssl/ssl_cert.c
@@ -318,12 +318,9 @@ void ssl_cert_free(CERT *c)
 			EVP_PKEY_free(c->pkeys[i].publickey);
 #endif
 		}
-	if (c->cert_chain != NULL)
-		sk_X509_pop_free(c->cert_chain,X509_free);
 	Free(c);
 	}
 
-#if 1
 int ssl_cert_inst(CERT **o)
 	{
 	/* Create a CERT if there isn't already one
@@ -352,32 +349,76 @@ int ssl_cert_inst(CERT **o)
 	return(1);
 	}
 
-#else /* Not needed any longer: SSL's always have their own copy */
-int ssl_cert_instantiate(CERT **o, CERT *d)
+
+SESS_CERT *ssl_sess_cert_new(void)
 	{
-	CERT *n;
-	if (o == NULL) 
+	SESS_CERT *ret;
+
+	ret = Malloc(sizeof *ret);
+	if (ret == NULL)
 		{
-		SSLerr(SSL_F_SSL_CERT_INSTANTIATE, ERR_R_PASSED_NULL_PARAMETER);
-		return(0);
+		SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
+		return NULL;
 		}
-	if (*o != NULL && (d == NULL || *o != d))
-	    return(1);
-	if ((n = ssl_cert_new()) == NULL) 
+
+	memset(ret, 0 ,sizeof *ret);
+	ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
+	ret->references = 1;
+
+	return ret;
+	}
+
+void ssl_sess_cert_free(SESS_CERT *sc)
+	{
+	int i;
+
+	if (sc == NULL)
+		return;
+
+	i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
+#ifdef REF_PRINT
+	REF_PRINT("SESS_CERT", sc);
+#endif
+	if (i > 0)
+		return;
+#ifdef REF_CHECK
+	if (i < 0)
 		{
-		SSLerr(SSL_F_SSL_CERT_INSTANTIATE, ERR_R_MALLOC_FAILURE);
-		return(0);
+		fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
+		abort(); /* ok */
 		}
-	if (*o != NULL) 
-		ssl_cert_free(*o);
-	*o = n;
-	return(1);
-	}
 #endif
 
-int ssl_set_cert_type(CERT *c,int type)
+	/* i == 0 */
+	if (sc->cert_chain != NULL)
+		sk_X509_pop_free(sc->cert_chain, X509_free);
+	for (i = 0; i < SSL_PKEY_NUM; i++)
+		{
+		if (sc->peer_pkeys[i].x509 != NULL)
+			X509_free(sc->peer_pkeys[i].x509);
+#if 0 /* We don't have the peer's private key.  These lines are just
+	   * here as a reminder that we're still using a not-quite-appropriate
+	   * data structure. */
+		if (sc->peer_pkeys[i].privatekey != NULL)
+			EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
+#endif
+		}
+
+#ifndef NO_RSA
+	if (sc->peer_rsa_tmp != NULL)
+		RSA_free(sc->peer_rsa_tmp);
+#endif
+#ifndef NO_DH
+	if (sc->peer_dh_tmp != NULL)
+		DH_free(sc->peer_dh_tmp);
+#endif
+
+	Free(sc);
+	}
+
+int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
 	{
-	c->cert_type=type;
+	sc->peer_cert_type = type;
 	return(1);
 	}
 
diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
index 1f3bf15b62..358abef1e6 100644
--- a/ssl/ssl_err.c
+++ b/ssl/ssl_err.c
@@ -165,6 +165,7 @@ static ERR_STRING_DATA SSL_str_functs[]=
 {ERR_PACK(0,SSL_F_SSL_RSA_PUBLIC_ENCRYPT,0),	"SSL_RSA_PUBLIC_ENCRYPT"},
 {ERR_PACK(0,SSL_F_SSL_SESSION_NEW,0),	"SSL_SESSION_new"},
 {ERR_PACK(0,SSL_F_SSL_SESSION_PRINT_FP,0),	"SSL_SESSION_print_fp"},
+{ERR_PACK(0,SSL_F_SSL_SESS_CERT_NEW,0),	"SSL_SESS_CERT_NEW"},
 {ERR_PACK(0,SSL_F_SSL_SET_CERT,0),	"SSL_SET_CERT"},
 {ERR_PACK(0,SSL_F_SSL_SET_FD,0),	"SSL_set_fd"},
 {ERR_PACK(0,SSL_F_SSL_SET_PKEY,0),	"SSL_SET_PKEY"},
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h
index fa48f0ef8b..b063be276d 100644
--- a/ssl/ssl_locl.h
+++ b/ssl/ssl_locl.h
@@ -275,19 +275,32 @@ typedef struct cert_st
 
 	CERT_PKEY pkeys[SSL_PKEY_NUM];
 
-	STACK_OF(X509) *cert_chain; /* XXX should only exist in sess_cert_st */
-
 	int references; /* >1 only if SSL_copy_session_id is used */
 	} CERT;
 
 
-#if 0	/* XXX not yet */
 typedef struct sess_cert_st
-{
-	/* anything that we want to keep per session */
-} SESS_CERT;
+	{
+	STACK_OF(X509) *cert_chain; /* as received from peer (not for SSL2) */
+
+	/* The 'peer_...' members are used only by clients. */
+	int peer_cert_type;
+
+	CERT_PKEY *peer_key; /* points to an element of peer_pkeys (never NULL!) */
+	CERT_PKEY peer_pkeys[SSL_PKEY_NUM];
+	/* Obviously we don't have the private keys of these,
+	 * so maybe we shouldn't even use the CERT_PKEY type here. */
+
+#ifndef NO_RSA
+	RSA *peer_rsa_tmp; /* not used for SSL 2 */
+#endif
+#ifndef NO_DH
+	DH *peer_dh_tmp; /* not used for SSL 2 */
 #endif
 
+	int references; /* actually always 1 at the moment */
+	} SESS_CERT;
+
 
 /*#define MAC_DEBUG	*/
 
@@ -353,13 +366,11 @@ void ssl_clear_cipher_ctx(SSL *s);
 int ssl_clear_bad_session(SSL *s);
 CERT *ssl_cert_new(void);
 CERT *ssl_cert_dup(CERT *cert);
-#if 1
 int ssl_cert_inst(CERT **o);
-#else
-int ssl_cert_instantiate(CERT **o, CERT *d);
-#endif
 void ssl_cert_free(CERT *c);
-int ssl_set_cert_type(CERT *c, int type);
+SESS_CERT *ssl_sess_cert_new(void);
+void ssl_sess_cert_free(SESS_CERT *sc);
+int ssl_set_peer_cert_type(SESS_CERT *c, int type);
 int ssl_get_new_session(SSL *s, int session);
 int ssl_get_prev_session(SSL *s, unsigned char *session,int len);
 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b);
diff --git a/ssl/ssl_sess.c b/ssl/ssl_sess.c
index 88d4b50c75..259725c7a1 100644
--- a/ssl/ssl_sess.c
+++ b/ssl/ssl_sess.c
@@ -115,6 +115,8 @@ SSL_SESSION *SSL_SESSION_new(void)
 
 int ssl_get_new_session(SSL *s, int session)
 	{
+	/* This gets used by clients and servers. */
+
 	SSL_SESSION *ss=NULL;
 
 	if ((ss=SSL_SESSION_new()) == NULL) return(0);
@@ -183,6 +185,8 @@ int ssl_get_new_session(SSL *s, int session)
 
 int ssl_get_prev_session(SSL *s, unsigned char *session_id, int len)
 	{
+	/* This is used only by servers. */
+
 	SSL_SESSION *ret=NULL,data;
 	int copy=1;
 
@@ -377,7 +381,7 @@ void SSL_SESSION_free(SSL_SESSION *ss)
 	memset(ss->key_arg,0,SSL_MAX_KEY_ARG_LENGTH);
 	memset(ss->master_key,0,SSL_MAX_MASTER_KEY_LENGTH);
 	memset(ss->session_id,0,SSL_MAX_SSL_SESSION_ID_LENGTH);
-	if (ss->sess_cert != NULL) ssl_cert_free(ss->sess_cert);
+	if (ss->sess_cert != NULL) ssl_sess_cert_free(ss->sess_cert);
 	if (ss->peer != NULL) X509_free(ss->peer);
 	if (ss->ciphers != NULL) sk_SSL_CIPHER_free(ss->ciphers);
 	memset(ss,0,sizeof(*ss));