PKCS#8 support for alternative PRFs.
[openssl.git] / ssl / ssl_cert.c
index ec2eb61..2c66460 100644 (file)
@@ -56,7 +56,7 @@
  * [including the GNU Public Licence.]
  */
 /* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1998-2007 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
  * 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/)"
+ *    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.
+ *    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
@@ -87,7 +87,7 @@
  * 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/)"
+ *    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
  * 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).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ * ECC cipher suite support in OpenSSL originally developed by 
+ * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
  */
 
 #include <stdio.h>
-#include <sys/types.h>
-#if !defined(WIN32) && !defined(VSM) && !defined(NeXT)
-#include <dirent.h>
-#endif
-#ifdef NeXT
-#include <sys/dir.h>
-#define dirent direct
+
+#include "e_os.h"
+#ifndef NO_SYS_TYPES_H
+# include <sys/types.h>
 #endif
+
+#include "o_dir.h"
 #include <openssl/objects.h>
 #include <openssl/bio.h>
 #include <openssl/pem.h>
+#include <openssl/x509v3.h>
+#ifndef OPENSSL_NO_DH
+#include <openssl/dh.h>
+#endif
+#include <openssl/bn.h>
 #include "ssl_locl.h"
 
 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
        {
-       static int ssl_x509_store_ctx_idx= -1;
+       static volatile int ssl_x509_store_ctx_idx= -1;
+       int got_write_lock = 0;
+
+       CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
 
        if (ssl_x509_store_ctx_idx < 0)
                {
-               ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
-                       0,"SSL for verify callback",NULL,NULL,NULL);
+               CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+               CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+               got_write_lock = 1;
+               
+               if (ssl_x509_store_ctx_idx < 0)
+                       {
+                       ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
+                               0,"SSL for verify callback",NULL,NULL,NULL);
+                       }
                }
-       return(ssl_x509_store_ctx_idx);
+
+       if (got_write_lock)
+               CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+       else
+               CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+       
+       return ssl_x509_store_ctx_idx;
+       }
+
+void ssl_cert_set_default_md(CERT *cert)
+       {
+       /* Set digest values to defaults */
+#ifndef OPENSSL_NO_DSA
+       cert->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
+#endif
+#ifndef OPENSSL_NO_RSA
+       cert->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
+       cert->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
+#endif
+#ifndef OPENSSL_NO_ECDSA
+       cert->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
+#endif
        }
 
 CERT *ssl_cert_new(void)
        {
        CERT *ret;
 
-       ret=(CERT *)Malloc(sizeof(CERT));
+       ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
        if (ret == NULL)
                {
                SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
@@ -144,7 +189,7 @@ CERT *ssl_cert_new(void)
 
        ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
        ret->references=1;
-
+       ssl_cert_set_default_md(ret);
        return(ret);
        }
 
@@ -153,7 +198,7 @@ CERT *ssl_cert_dup(CERT *cert)
        CERT *ret;
        int i;
 
-       ret = (CERT *)Malloc(sizeof(CERT));
+       ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
        if (ret == NULL)
                {
                SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
@@ -167,48 +212,81 @@ CERT *ssl_cert_dup(CERT *cert)
         * if you find that more readable */
 
        ret->valid = cert->valid;
-       ret->mask = cert->mask;
-       ret->export_mask = cert->export_mask;
+       ret->mask_k = cert->mask_k;
+       ret->mask_a = cert->mask_a;
+       ret->export_mask_k = cert->export_mask_k;
+       ret->export_mask_a = cert->export_mask_a;
 
-#ifndef NO_RSA
+#ifndef OPENSSL_NO_RSA
        if (cert->rsa_tmp != NULL)
                {
+               RSA_up_ref(cert->rsa_tmp);
                ret->rsa_tmp = cert->rsa_tmp;
-               CRYPTO_add(&ret->rsa_tmp->references, 1, CRYPTO_LOCK_RSA);
                }
        ret->rsa_tmp_cb = cert->rsa_tmp_cb;
 #endif
 
-#ifndef NO_DH
+#ifndef OPENSSL_NO_DH
        if (cert->dh_tmp != NULL)
                {
-               /* DH parameters don't have a reference count (and cannot
-                * reasonably be shared anyway, as the secret exponent may
-                * be created just when it is needed -- earlier library
-                * versions did not pay attention to this) */
                ret->dh_tmp = DHparams_dup(cert->dh_tmp);
                if (ret->dh_tmp == NULL)
                        {
-                       SSLerr(SSL_F_SSL_CERT_NEW, ERR_R_DH_LIB);
+                       SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
                        goto err;
                        }
+               if (cert->dh_tmp->priv_key)
+                       {
+                       BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
+                       if (!b)
+                               {
+                               SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
+                               goto err;
+                               }
+                       ret->dh_tmp->priv_key = b;
+                       }
+               if (cert->dh_tmp->pub_key)
+                       {
+                       BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
+                       if (!b)
+                               {
+                               SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
+                               goto err;
+                               }
+                       ret->dh_tmp->pub_key = b;
+                       }
                }
        ret->dh_tmp_cb = cert->dh_tmp_cb;
 #endif
 
+#ifndef OPENSSL_NO_ECDH
+       if (cert->ecdh_tmp)
+               {
+               ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
+               if (ret->ecdh_tmp == NULL)
+                       {
+                       SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
+                       goto err;
+                       }
+               }
+       ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
+       ret->ecdh_tmp_auto = cert->ecdh_tmp_auto;
+#endif
+
        for (i = 0; i < SSL_PKEY_NUM; i++)
                {
-               if (cert->pkeys[i].x509 != NULL)
+               CERT_PKEY *cpk = cert->pkeys + i;
+               CERT_PKEY *rpk = ret->pkeys + i;
+               if (cpk->x509 != NULL)
                        {
-                       ret->pkeys[i].x509 = cert->pkeys[i].x509;
-                       CRYPTO_add(&ret->pkeys[i].x509->references, 1,
-                               CRYPTO_LOCK_X509);
+                       rpk->x509 = cpk->x509;
+                       CRYPTO_add(&rpk->x509->references, 1, CRYPTO_LOCK_X509);
                        }
                
-               if (cert->pkeys[i].privatekey != NULL)
+               if (cpk->privatekey != NULL)
                        {
-                       ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
-                       CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
+                       rpk->privatekey = cpk->privatekey;
+                       CRYPTO_add(&cpk->privatekey->references, 1,
                                CRYPTO_LOCK_EVP_PKEY);
 
                        switch(i) 
@@ -230,42 +308,171 @@ CERT *ssl_cert_dup(CERT *cert)
                        case SSL_PKEY_DH_DSA:
                                /* We have a DH key. */
                                break;
-                               
+
+                       case SSL_PKEY_ECC:
+                               /* We have an ECC key */
+                               break;
+
                        default:
                                /* Can't happen. */
                                SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
                                }
                        }
+
+               if (cpk->chain)
+                       {
+                       rpk->chain = X509_chain_up_ref(cpk->chain);
+                       if (!rpk->chain)
+                               {
+                               SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
+                               goto err;
+                               }
+                       }
+               rpk->valid_flags = 0;
+#ifndef OPENSSL_NO_TLSEXT
+               if (cert->pkeys[i].serverinfo != NULL)
+                       {
+                       /* Just copy everything. */
+                       ret->pkeys[i].serverinfo =
+                               OPENSSL_malloc(cert->pkeys[i].serverinfo_length);
+                       if (ret->pkeys[i].serverinfo == NULL)
+                               {
+                               SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
+                               return NULL;
+                               }
+                       ret->pkeys[i].serverinfo_length =
+                               cert->pkeys[i].serverinfo_length;
+                       memcpy(ret->pkeys[i].serverinfo,
+                              cert->pkeys[i].serverinfo,
+                              cert->pkeys[i].serverinfo_length);
+                       }
+#endif
                }
        
-       /* ret->extra_certs *should* exist, but currently the own certificate
-        * chain is held inside SSL_CTX */
-
        ret->references=1;
+       /* Set digests to defaults. NB: we don't copy existing values as they
+        * will be set during handshake.
+        */
+       ssl_cert_set_default_md(ret);
+       /* Peer sigalgs set to NULL as we get these from handshake too */
+       ret->peer_sigalgs = NULL;
+       ret->peer_sigalgslen = 0;
+       /* Configured sigalgs however we copy across */
+
+       if (cert->conf_sigalgs)
+               {
+               ret->conf_sigalgs = OPENSSL_malloc(cert->conf_sigalgslen);
+               if (!ret->conf_sigalgs)
+                       goto err;
+               memcpy(ret->conf_sigalgs, cert->conf_sigalgs,
+                                               cert->conf_sigalgslen);
+               ret->conf_sigalgslen = cert->conf_sigalgslen;
+               }
+       else
+               ret->conf_sigalgs = NULL;
+
+       if (cert->client_sigalgs)
+               {
+               ret->client_sigalgs = OPENSSL_malloc(cert->client_sigalgslen);
+               if (!ret->client_sigalgs)
+                       goto err;
+               memcpy(ret->client_sigalgs, cert->client_sigalgs,
+                                               cert->client_sigalgslen);
+               ret->client_sigalgslen = cert->client_sigalgslen;
+               }
+       else
+               ret->client_sigalgs = NULL;
+       /* Shared sigalgs also NULL */
+       ret->shared_sigalgs = NULL;
+       /* Copy any custom client certificate types */
+       if (cert->ctypes)
+               {
+               ret->ctypes = OPENSSL_malloc(cert->ctype_num);
+               if (!ret->ctypes)
+                       goto err;
+               memcpy(ret->ctypes, cert->ctypes, cert->ctype_num);
+               ret->ctype_num = cert->ctype_num;
+               }
+
+       ret->cert_flags = cert->cert_flags;
+
+       ret->cert_cb = cert->cert_cb;
+       ret->cert_cb_arg = cert->cert_cb_arg;
+
+       if (cert->verify_store)
+               {
+               CRYPTO_add(&cert->verify_store->references, 1, CRYPTO_LOCK_X509_STORE);
+               ret->verify_store = cert->verify_store;
+               }
+
+       if (cert->chain_store)
+               {
+               CRYPTO_add(&cert->chain_store->references, 1, CRYPTO_LOCK_X509_STORE);
+               ret->chain_store = cert->chain_store;
+               }
+
+       ret->ciphers_raw = NULL;
 
        return(ret);
        
+#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
 err:
-#ifndef NO_RSA
+#endif
+#ifndef OPENSSL_NO_RSA
        if (ret->rsa_tmp != NULL)
                RSA_free(ret->rsa_tmp);
 #endif
-#ifndef NO_DH
+#ifndef OPENSSL_NO_DH
        if (ret->dh_tmp != NULL)
                DH_free(ret->dh_tmp);
 #endif
+#ifndef OPENSSL_NO_ECDH
+       if (ret->ecdh_tmp != NULL)
+               EC_KEY_free(ret->ecdh_tmp);
+#endif
 
-       for (i = 0; i < SSL_PKEY_NUM; i++)
-               {
-               if (ret->pkeys[i].x509 != NULL)
-                       X509_free(ret->pkeys[i].x509);
-               if (ret->pkeys[i].privatekey != NULL)
-                       EVP_PKEY_free(ret->pkeys[i].privatekey);
-               }
+       ssl_cert_clear_certs(ret);
 
        return NULL;
        }
 
+/* Free up and clear all certificates and chains */
+
+void ssl_cert_clear_certs(CERT *c)
+       {
+       int i;
+       if (c == NULL)
+               return;
+       for (i = 0; i<SSL_PKEY_NUM; i++)
+               {
+               CERT_PKEY *cpk = c->pkeys + i;
+               if (cpk->x509)
+                       {
+                       X509_free(cpk->x509);
+                       cpk->x509 = NULL;
+                       }
+               if (cpk->privatekey)
+                       {
+                       EVP_PKEY_free(cpk->privatekey);
+                       cpk->privatekey = NULL;
+                       }
+               if (cpk->chain)
+                       {
+                       sk_X509_pop_free(cpk->chain, X509_free);
+                       cpk->chain = NULL;
+                       }
+#ifndef OPENSSL_NO_TLSEXT
+               if (cpk->serverinfo)
+                       {
+                       OPENSSL_free(cpk->serverinfo);
+                       cpk->serverinfo = NULL;
+                       cpk->serverinfo_length = 0;
+                       }
+#endif
+               /* Clear all flags apart from explicit sign */
+               cpk->valid_flags &= CERT_PKEY_EXPLICIT_SIGN;
+               }
+       }
 
 void ssl_cert_free(CERT *c)
        {
@@ -287,25 +494,34 @@ void ssl_cert_free(CERT *c)
                }
 #endif
 
-#ifndef NO_RSA
+#ifndef OPENSSL_NO_RSA
        if (c->rsa_tmp) RSA_free(c->rsa_tmp);
 #endif
-#ifndef NO_DH
+#ifndef OPENSSL_NO_DH
        if (c->dh_tmp) DH_free(c->dh_tmp);
 #endif
-
-       for (i=0; i<SSL_PKEY_NUM; i++)
-               {
-               if (c->pkeys[i].x509 != NULL)
-                       X509_free(c->pkeys[i].x509);
-               if (c->pkeys[i].privatekey != NULL)
-                       EVP_PKEY_free(c->pkeys[i].privatekey);
-#if 0
-               if (c->pkeys[i].publickey != NULL)
-                       EVP_PKEY_free(c->pkeys[i].publickey);
+#ifndef OPENSSL_NO_ECDH
+       if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
 #endif
-               }
-       Free(c);
+
+       ssl_cert_clear_certs(c);
+       if (c->peer_sigalgs)
+               OPENSSL_free(c->peer_sigalgs);
+       if (c->conf_sigalgs)
+               OPENSSL_free(c->conf_sigalgs);
+       if (c->client_sigalgs)
+               OPENSSL_free(c->client_sigalgs);
+       if (c->shared_sigalgs)
+               OPENSSL_free(c->shared_sigalgs);
+       if (c->ctypes)
+               OPENSSL_free(c->ctypes);
+       if (c->verify_store)
+               X509_STORE_free(c->verify_store);
+       if (c->chain_store)
+               X509_STORE_free(c->chain_store);
+       if (c->ciphers_raw)
+               OPENSSL_free(c->ciphers_raw);
+       OPENSSL_free(c);
        }
 
 int ssl_cert_inst(CERT **o)
@@ -336,12 +552,118 @@ int ssl_cert_inst(CERT **o)
        return(1);
        }
 
+int ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
+       {
+       CERT_PKEY *cpk = c->key;
+       if (!cpk)
+               return 0;
+       if (cpk->chain)
+               sk_X509_pop_free(cpk->chain, X509_free);
+       cpk->chain = chain;
+       return 1;
+       }
+
+int ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
+       {
+       STACK_OF(X509) *dchain;
+       if (!chain)
+               return ssl_cert_set0_chain(c, NULL);
+       dchain = X509_chain_up_ref(chain);
+       if (!dchain)
+               return 0;
+       if (!ssl_cert_set0_chain(c, dchain))
+               {
+               sk_X509_pop_free(dchain, X509_free);
+               return 0;
+               }
+       return 1;
+       }
+
+int ssl_cert_add0_chain_cert(CERT *c, X509 *x)
+       {
+       CERT_PKEY *cpk = c->key;
+       if (!cpk)
+               return 0;
+       if (!cpk->chain)
+               cpk->chain = sk_X509_new_null();
+       if (!cpk->chain || !sk_X509_push(cpk->chain, x))
+               return 0;
+       return 1;
+       }
+
+int ssl_cert_add1_chain_cert(CERT *c, X509 *x)
+       {
+       if (!ssl_cert_add0_chain_cert(c, x))
+               return 0;
+       CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
+       return 1;
+       }
+
+int ssl_cert_select_current(CERT *c, X509 *x)
+       {
+       int i;
+       if (x == NULL)
+               return 0;
+       for (i = 0; i < SSL_PKEY_NUM; i++)
+               {
+               CERT_PKEY *cpk = c->pkeys + i;
+               if (cpk->x509 == x && cpk->privatekey)
+                       {
+                       c->key = cpk;
+                       return 1;
+                       }
+               }
+
+       for (i = 0; i < SSL_PKEY_NUM; i++)
+               {
+               CERT_PKEY *cpk = c->pkeys + i;
+               if (cpk->privatekey && cpk->x509 && !X509_cmp(cpk->x509, x))
+                       {
+                       c->key = cpk;
+                       return 1;
+                       }
+               }
+       return 0;
+       }
+
+int ssl_cert_set_current(CERT *c, long op)
+       {
+       int i, idx;
+       if (!c)
+               return 0;
+       if (op == SSL_CERT_SET_FIRST)
+               idx = 0;
+       else if (op == SSL_CERT_SET_NEXT)
+               {
+               idx = (int)(c->key - c->pkeys + 1);
+               if (idx >= SSL_PKEY_NUM)
+                       return 0;
+               }
+       else
+               return 0;
+       for (i = idx; i < SSL_PKEY_NUM; i++)
+               {
+               CERT_PKEY *cpk = c->key + i;
+               if (cpk->x509 && cpk->privatekey)
+                       {
+                       c->key = cpk;
+                       return 1;
+                       }
+               }
+       return 0;
+       }
+
+void ssl_cert_set_cert_cb(CERT *c, int (*cb)(SSL *ssl, void *arg), void *arg)
+       {
+       c->cert_cb = cb;
+       c->cert_cb_arg = arg;
+       }
 
 SESS_CERT *ssl_sess_cert_new(void)
        {
        SESS_CERT *ret;
 
-       ret = Malloc(sizeof *ret);
+       ret = OPENSSL_malloc(sizeof *ret);
        if (ret == NULL)
                {
                SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
@@ -391,16 +713,20 @@ void ssl_sess_cert_free(SESS_CERT *sc)
 #endif
                }
 
-#ifndef NO_RSA
+#ifndef OPENSSL_NO_RSA
        if (sc->peer_rsa_tmp != NULL)
                RSA_free(sc->peer_rsa_tmp);
 #endif
-#ifndef NO_DH
+#ifndef OPENSSL_NO_DH
        if (sc->peer_dh_tmp != NULL)
                DH_free(sc->peer_dh_tmp);
 #endif
+#ifndef OPENSSL_NO_ECDH
+       if (sc->peer_ecdh_tmp != NULL)
+               EC_KEY_free(sc->peer_ecdh_tmp);
+#endif
 
-       Free(sc);
+       OPENSSL_free(sc);
        }
 
 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
@@ -413,23 +739,55 @@ int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
        {
        X509 *x;
        int i;
+       X509_STORE *verify_store;
        X509_STORE_CTX ctx;
 
+       if (s->cert->verify_store)
+               verify_store = s->cert->verify_store;
+       else
+               verify_store = s->ctx->cert_store;
+
        if ((sk == NULL) || (sk_X509_num(sk) == 0))
                return(0);
 
        x=sk_X509_value(sk,0);
-       X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk);
+       if(!X509_STORE_CTX_init(&ctx,verify_store,x,sk))
+               {
+               SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
+               return(0);
+               }
+       /* Set suite B flags if needed */
+       X509_STORE_CTX_set_flags(&ctx, tls1_suiteb(s));
+#if 0
        if (SSL_get_verify_depth(s) >= 0)
                X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
-       X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),
-               (char *)s);
+#endif
+       X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
+
+       /* We need to inherit the verify parameters. These can be determined by
+        * the context: if its a server it will verify SSL client certificates
+        * or vice versa.
+        */
+
+       X509_STORE_CTX_set_default(&ctx,
+                               s->server ? "ssl_client" : "ssl_server");
+       /* Anything non-default in "param" should overwrite anything in the
+        * ctx.
+        */
+       X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
+
+       if (s->verify_callback)
+               X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
 
        if (s->ctx->app_verify_callback != NULL)
-               i=s->ctx->app_verify_callback(&ctx);
+#if 1 /* new with OpenSSL 0.9.7 */
+               i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
+#else
+               i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
+#endif
        else
                {
-#ifndef NO_X509_VERIFY
+#ifndef OPENSSL_NO_X509_VERIFY
                i=X509_verify_cert(&ctx);
 #else
                i=0;
@@ -444,12 +802,12 @@ int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
        return(i);
        }
 
-static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *list)
+static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
        {
        if (*ca_list != NULL)
                sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
 
-       *ca_list=list;
+       *ca_list=name_list;
        }
 
 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
@@ -471,22 +829,22 @@ STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
        return(ret);
        }
 
-void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *list)
+void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
        {
-       set_client_CA_list(&(s->client_CA),list);
+       set_client_CA_list(&(s->client_CA),name_list);
        }
 
-void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *list)
+void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
        {
-       set_client_CA_list(&(ctx->client_CA),list);
+       set_client_CA_list(&(ctx->client_CA),name_list);
        }
 
-STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(SSL_CTX *ctx)
+STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
        {
        return(ctx->client_CA);
        }
 
-STACK_OF(X509_NAME) *SSL_get_client_CA_list(SSL *s)
+STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
        {
        if (s->type == SSL_ST_CONNECT)
                { /* we are in the client */
@@ -534,12 +892,12 @@ int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
        return(add_client_CA(&(ctx->client_CA),x));
        }
 
-static int name_cmp(X509_NAME **a,X509_NAME **b)
+static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
        {
        return(X509_NAME_cmp(*a,*b));
        }
 
-#ifndef NO_STDIO
+#ifndef OPENSSL_NO_STDIO
 /*!
  * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
  * it doesn't really have anything to do with clients (except that a common use
@@ -553,14 +911,13 @@ STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
        BIO *in;
        X509 *x=NULL;
        X509_NAME *xn=NULL;
-       STACK_OF(X509_NAME) *ret,*sk;
+       STACK_OF(X509_NAME) *ret = NULL,*sk;
 
-       ret=sk_X509_NAME_new(NULL);
-       sk=sk_X509_NAME_new(name_cmp);
+       sk=sk_X509_NAME_new(xname_cmp);
 
        in=BIO_new(BIO_s_file_internal());
 
-       if ((ret == NULL) || (sk == NULL) || (in == NULL))
+       if ((sk == NULL) || (in == NULL))
                {
                SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
                goto err;
@@ -571,8 +928,17 @@ STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
 
        for (;;)
                {
-               if (PEM_read_bio_X509(in,&x,NULL) == NULL)
+               if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
                        break;
+               if (ret == NULL)
+                       {
+                       ret = sk_X509_NAME_new_null();
+                       if (ret == NULL)
+                               {
+                               SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
+                               goto err;
+                               }
+                       }
                if ((xn=X509_get_subject_name(x)) == NULL) goto err;
                /* check for duplicates */
                xn=X509_NAME_dup(xn);
@@ -595,6 +961,8 @@ err:
        if (sk != NULL) sk_X509_NAME_free(sk);
        if (in != NULL) BIO_free(in);
        if (x != NULL) X509_free(x);
+       if (ret != NULL)
+               ERR_clear_error();
        return(ret);
        }
 #endif
@@ -610,53 +978,55 @@ err:
 
 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
                                        const char *file)
-    {
-    BIO *in;
-    X509 *x=NULL;
-    X509_NAME *xn=NULL;
-    int ret=1;
-    int (*oldcmp)(X509_NAME **a, X509_NAME **b);
-
-    oldcmp=sk_X509_NAME_set_cmp_func(stack,name_cmp);
-
-    in=BIO_new(BIO_s_file_internal());
-
-    if (in == NULL)
        {
-       SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
-       goto err;
-       }
+       BIO *in;
+       X509 *x=NULL;
+       X509_NAME *xn=NULL;
+       int ret=1;
+       int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
        
-    if (!BIO_read_filename(in,file))
-       goto err;
-
-    for (;;)
-       {
-       if (PEM_read_bio_X509(in,&x,NULL) == NULL)
-           break;
-       if ((xn=X509_get_subject_name(x)) == NULL) goto err;
-       xn=X509_NAME_dup(xn);
-       if (xn == NULL) goto err;
-       if (sk_X509_NAME_find(stack,xn) >= 0)
-           X509_NAME_free(xn);
-       else
-           sk_X509_NAME_push(stack,xn);
-       }
+       oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
+       
+       in=BIO_new(BIO_s_file_internal());
+       
+       if (in == NULL)
+               {
+               SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+       
+       if (!BIO_read_filename(in,file))
+               goto err;
+       
+       for (;;)
+               {
+               if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
+                       break;
+               if ((xn=X509_get_subject_name(x)) == NULL) goto err;
+               xn=X509_NAME_dup(xn);
+               if (xn == NULL) goto err;
+               if (sk_X509_NAME_find(stack,xn) >= 0)
+                       X509_NAME_free(xn);
+               else
+                       sk_X509_NAME_push(stack,xn);
+               }
 
-    if (0)
-       {
-err:
-       ret=0;
-       }
-    if(in != NULL)
-       BIO_free(in);
-    if(x != NULL)
-       X509_free(x);
+       ERR_clear_error();
 
-    sk_X509_NAME_set_cmp_func(stack,oldcmp);
+       if (0)
+               {
+err:
+               ret=0;
+               }
+       if(in != NULL)
+               BIO_free(in);
+       if(x != NULL)
+               X509_free(x);
+       
+       (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
 
-    return ret;
-    }
+       return ret;
+       }
 
 /*!
  * Add a directory of certs to a stack.
@@ -669,46 +1039,264 @@ err:
  * certs may have been added to \c stack.
  */
 
-#ifndef WIN32
-#ifndef VMS                    /* XXXX This may be fixed in the future */
-
 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
                                       const char *dir)
-    {
-    DIR *d;
-    struct dirent *dstruct;
-    int ret = 0;
+       {
+       OPENSSL_DIR_CTX *d = NULL;
+       const char *filename;
+       int ret = 0;
+
+       CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
+
+       /* Note that a side effect is that the CAs will be sorted by name */
+
+       while((filename = OPENSSL_DIR_read(&d, dir)))
+               {
+               char buf[1024];
+               int r;
+
+               if(strlen(dir)+strlen(filename)+2 > sizeof buf)
+                       {
+                       SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
+                       goto err;
+                       }
+
+#ifdef OPENSSL_SYS_VMS
+               r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
+#else
+               r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
+#endif
+               if (r <= 0 || r >= (int)sizeof(buf))
+                       goto err;
+               if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
+                       goto err;
+               }
 
-    CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
-    d = opendir(dir);
+       if (errno)
+               {
+               SYSerr(SYS_F_OPENDIR, get_last_sys_error());
+               ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
+               SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
+               goto err;
+               }
 
-    /* Note that a side effect is that the CAs will be sorted by name */
-    if(!d)
+       ret = 1;
+
+err:
+       if (d) OPENSSL_DIR_end(&d);
+       CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
+       return ret;
+       }
+
+/* Add a certificate to a BUF_MEM structure */
+
+static int ssl_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
        {
-       SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
-       goto err;
+       int n;
+       unsigned char *p;
+
+       n=i2d_X509(x,NULL);
+       if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
+               {
+               SSLerr(SSL_F_SSL_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
+               return 0;
+               }
+       p=(unsigned char *)&(buf->data[*l]);
+       l2n3(n,p);
+       i2d_X509(x,&p);
+       *l+=n+3;
+
+       return 1;
        }
 
-    while((dstruct=readdir(d)))
+/* Add certificate chain to internal SSL BUF_MEM strcuture */
+int ssl_add_cert_chain(SSL *s, CERT_PKEY *cpk, unsigned long *l)
        {
-       char buf[1024];
+       BUF_MEM *buf = s->init_buf;
+       int no_chain;
+       int i;
 
-       if(strlen(dir)+strlen(dstruct->d_name)+2 > sizeof buf)
-           {
-           SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
-           goto err;
-           }
-       
-       sprintf(buf,"%s/%s",dir,dstruct->d_name);
-       if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
-           goto err;
+       X509 *x;
+       STACK_OF(X509) *extra_certs;
+       X509_STORE *chain_store;
+
+       if (cpk)
+               x = cpk->x509;
+       else
+               x = NULL;
+
+       if (s->cert->chain_store)
+               chain_store = s->cert->chain_store;
+       else
+               chain_store = s->ctx->cert_store;
+
+       /* If we have a certificate specific chain use it, else use
+        * parent ctx.
+        */
+       if (cpk && cpk->chain)
+               extra_certs = cpk->chain;
+       else
+               extra_certs = s->ctx->extra_certs;
+
+       if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || extra_certs)
+               no_chain = 1;
+       else
+               no_chain = 0;
+
+       /* TLSv1 sends a chain with nothing in it, instead of an alert */
+       if (!BUF_MEM_grow_clean(buf,10))
+               {
+               SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_BUF_LIB);
+               return 0;
+               }
+       if (x != NULL)
+               {
+               if (no_chain)
+                       {
+                       if (!ssl_add_cert_to_buf(buf, l, x))
+                               return 0;
+                       }
+               else
+                       {
+                       X509_STORE_CTX xs_ctx;
+
+                       if (!X509_STORE_CTX_init(&xs_ctx,chain_store,x,NULL))
+                               {
+                               SSLerr(SSL_F_SSL_ADD_CERT_CHAIN,ERR_R_X509_LIB);
+                               return(0);
+                               }
+                       X509_verify_cert(&xs_ctx);
+                       /* Don't leave errors in the queue */
+                       ERR_clear_error();
+                       for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
+                               {
+                               x = sk_X509_value(xs_ctx.chain, i);
+
+                               if (!ssl_add_cert_to_buf(buf, l, x))
+                                       {
+                                       X509_STORE_CTX_cleanup(&xs_ctx);
+                                       return 0;
+                                       }
+                               }
+                       X509_STORE_CTX_cleanup(&xs_ctx);
+                       }
+               }
+       for (i=0; i<sk_X509_num(extra_certs); i++)
+               {
+               x=sk_X509_value(extra_certs,i);
+               if (!ssl_add_cert_to_buf(buf, l, x))
+                       return 0;
+               }
+
+       return 1;
        }
-    ret = 1;
 
-err:   
-    CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
-    return ret;
-    }
+/* Build a certificate chain for current certificate */
+int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags)
+       {
+       CERT_PKEY *cpk = c->key;
+       X509_STORE_CTX xs_ctx;
+       STACK_OF(X509) *chain = NULL, *untrusted = NULL;
+       X509 *x;
+       int i, rv = 0;
+
+       if (!cpk->x509)
+               {
+               SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_NO_CERTIFICATE_SET);
+               goto err;
+               }
+       /* Rearranging and check the chain: add everything to a store */
+       if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
+               {
+               chain_store = X509_STORE_new();
+               if (!chain_store)
+                       goto err;
+               for (i = 0; i < sk_X509_num(cpk->chain); i++)
+                       {
+                       x = sk_X509_value(cpk->chain, i);
+                       if (!X509_STORE_add_cert(chain_store, x))
+                               goto err;
+                       }
+               /* Add EE cert too: it might be self signed */
+               if (!X509_STORE_add_cert(chain_store, cpk->x509))
+                       goto err;
+               }
+       else
+               {
+               if (c->chain_store)
+                       chain_store = c->chain_store;
+
+               if (flags & SSL_BUILD_CHAIN_FLAG_UNTRUSTED)
+                       untrusted = cpk->chain;
+               }
+
+       if (!X509_STORE_CTX_init(&xs_ctx, chain_store, cpk->x509, untrusted))
+               {
+               SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, ERR_R_X509_LIB);
+               goto err;
+               }
+       /* Set suite B flags if needed */
+       X509_STORE_CTX_set_flags(&xs_ctx, c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS);
+
+       i = X509_verify_cert(&xs_ctx);
+       if (i <= 0 && flags & SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR)
+               {
+               ERR_clear_error();
+               i = 1;
+               }
+       if (i > 0)
+               chain = X509_STORE_CTX_get1_chain(&xs_ctx);
+       if (i <= 0)
+               {
+               SSLerr(SSL_F_SSL_BUILD_CERT_CHAIN, SSL_R_CERTIFICATE_VERIFY_FAILED);
+               i = X509_STORE_CTX_get_error(&xs_ctx);
+               ERR_add_error_data(2, "Verify error:",
+                                       X509_verify_cert_error_string(i));
+
+               X509_STORE_CTX_cleanup(&xs_ctx);
+               goto err;
+               }
+       X509_STORE_CTX_cleanup(&xs_ctx);
+       if (cpk->chain)
+               sk_X509_pop_free(cpk->chain, X509_free);
+       /* Remove EE certificate from chain */
+       x = sk_X509_shift(chain);
+       X509_free(x);
+       if (flags & SSL_BUILD_CHAIN_FLAG_NO_ROOT)
+               {
+               if (sk_X509_num(chain) > 0)
+                       {
+                       /* See if last cert is self signed */
+                       x = sk_X509_value(chain, sk_X509_num(chain) - 1);
+                       X509_check_purpose(x, -1, 0);
+                       if (x->ex_flags & EXFLAG_SS)
+                               {
+                               x = sk_X509_pop(chain);
+                               X509_free(x);
+                               }
+                       }
+               }
+       cpk->chain = chain;
+       rv = 1;
+       err:
+       if (flags & SSL_BUILD_CHAIN_FLAG_CHECK)
+               X509_STORE_free(chain_store);
+
+       return rv;
+       }
+
+int ssl_cert_set_cert_store(CERT *c, X509_STORE *store, int chain, int ref)
+       {
+       X509_STORE **pstore;
+       if (chain)
+               pstore = &c->chain_store;
+       else
+               pstore = &c->verify_store;
+       if (*pstore)
+               X509_STORE_free(*pstore);
+       *pstore = store;
+       if (ref && store)
+               CRYPTO_add(&store->references, 1, CRYPTO_LOCK_X509_STORE);
+       return 1;
+       }
 
-#endif
-#endif