Continued multibyte character support.
[openssl.git] / ssl / ssl_lib.c
index 6a80fbe16380245127155e00215c0ecb30322c46..e192fc4cac3a2f29d503f30d23bc7a8d1f264f8e 100644 (file)
@@ -70,7 +70,7 @@ static STACK *ssl_ctx_meth=NULL;
 static int ssl_meth_num=0;
 static int ssl_ctx_meth_num=0;
 
-SSL3_ENC_METHOD ssl3_undef_enc_method={
+OPENSSL_GLOBAL SSL3_ENC_METHOD ssl3_undef_enc_method={
        ssl_undefined_function,
        ssl_undefined_function,
        ssl_undefined_function,
@@ -178,14 +178,24 @@ SSL *SSL_new(SSL_CTX *ctx)
        if (s == NULL) goto err;
        memset(s,0,sizeof(SSL));
 
-       if (ctx->default_cert != NULL)
+       if (ctx->cert != NULL)
                {
-               CRYPTO_add(&ctx->default_cert->references,1,
-                          CRYPTO_LOCK_SSL_CERT);
-               s->cert=ctx->default_cert;
+               /* Earlier library versions used to copy the pointer to
+                * the CERT, not its contents; only when setting new
+                * parameters for the per-SSL copy, ssl_cert_new would be
+                * called (and the direct reference to the per-SSL_CTX
+                * settings would be lost, but those still were indirectly
+                * accessed for various purposes, and for that reason they
+                * used to be known as s->ctx->default_cert).
+                * Now we don't look at the SSL_CTX's CERT after having
+                * duplicated it once. */
+
+               s->cert = ssl_cert_dup(ctx->cert);
+               if (s->cert == NULL)
+                       goto err;
                }
        else
-               s->cert=NULL;
+               s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
        s->sid_ctx_length=ctx->sid_ctx_length;
        memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
        s->verify_mode=ctx->verify_mode;
@@ -199,22 +209,27 @@ SSL *SSL_new(SSL_CTX *ctx)
        s->method=ctx->method;
 
        if (!s->method->ssl_new(s))
-               {
-               SSL_CTX_free(ctx);
-               Free(s);
                goto err;
-               }
 
        s->quiet_shutdown=ctx->quiet_shutdown;
        s->references=1;
        s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
        s->options=ctx->options;
+       s->mode=ctx->mode;
        SSL_clear(s);
 
        CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
 
        return(s);
 err:
+       if (s != NULL)
+               {
+               if (s->cert != NULL)
+                       ssl_cert_free(s->cert);
+               if (s->ctx != NULL)
+                       SSL_CTX_free(s->ctx); /* decrement reference count */
+               Free(s);
+               }
        SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
        return(NULL);
        }
@@ -496,10 +511,10 @@ STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
        {
        STACK_OF(X509) *r;
        
-       if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
+       if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
                r=NULL;
        else
-               r=s->session->cert->cert_chain;
+               r=s->session->sess_cert->cert_chain;
 
        return(r);
        }
@@ -538,18 +553,18 @@ void SSL_copy_session_id(SSL *t,SSL *f)
 int SSL_CTX_check_private_key(SSL_CTX *ctx)
        {
        if (    (ctx == NULL) ||
-               (ctx->default_cert == NULL) ||
-               (ctx->default_cert->key->x509 == NULL))
+               (ctx->cert == NULL) ||
+               (ctx->cert->key->x509 == NULL))
                {
                SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
                return(0);
                }
-       if      (ctx->default_cert->key->privatekey == NULL)
+       if      (ctx->cert->key->privatekey == NULL)
                {
                SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
                return(0);
                }
-       return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
+       return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
        }
 
 /* Fix this function so that it takes an optional type parameter */
@@ -561,7 +576,10 @@ int SSL_check_private_key(SSL *ssl)
                return(0);
                }
        if (ssl->cert == NULL)
-               return(SSL_CTX_check_private_key(ssl->ctx));
+               {
+                SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
+               return 0;
+               }
        if (ssl->cert->key->x509 == NULL)
                {
                SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
@@ -578,11 +596,19 @@ int SSL_check_private_key(SSL *ssl)
 
 int SSL_accept(SSL *s)
        {
+       if (s->handshake_func == 0)
+               /* Not properly initialized yet */
+               SSL_set_accept_state(s);
+
        return(s->method->ssl_accept(s));
        }
 
 int SSL_connect(SSL *s)
        {
+       if (s->handshake_func == 0)
+               /* Not properly initialized yet */
+               SSL_set_connect_state(s);
+
        return(s->method->ssl_connect(s));
        }
 
@@ -593,6 +619,12 @@ long SSL_get_default_timeout(SSL *s)
 
 int SSL_read(SSL *s,char *buf,int num)
        {
+       if (s->handshake_func == 0)
+               {
+               SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
+               return -1;
+               }
+
        if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
                {
                s->rwstate=SSL_NOTHING;
@@ -612,6 +644,12 @@ int SSL_peek(SSL *s,char *buf,int num)
 
 int SSL_write(SSL *s,const char *buf,int num)
        {
+       if (s->handshake_func == 0)
+               {
+               SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
+               return -1;
+               }
+
        if (s->shutdown & SSL_SENT_SHUTDOWN)
                {
                s->rwstate=SSL_NOTHING;
@@ -623,6 +661,18 @@ int SSL_write(SSL *s,const char *buf,int num)
 
 int SSL_shutdown(SSL *s)
        {
+       /* Note that this function behaves differently from what one might
+        * expect.  Return values are 0 for no success (yet),
+        * 1 for success; but calling it once is usually not enough,
+        * even if blocking I/O is used (see ssl3_shutdown).
+        */
+
+       if (s->handshake_func == 0)
+               {
+               SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
+               return -1;
+               }
+
        if ((s != NULL) && !SSL_in_init(s))
                return(s->method->ssl_shutdown(s));
        else
@@ -649,6 +699,8 @@ long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
                return(l);
        case SSL_CTRL_OPTIONS:
                return(s->options|=larg);
+       case SSL_CTRL_MODE:
+               return(s->mode|=larg);
        default:
                return(s->method->ssl_ctrl(s,cmd,larg,parg));
                }
@@ -706,6 +758,8 @@ long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
                return(ctx->stats.sess_cache_full);
        case SSL_CTRL_OPTIONS:
                return(ctx->options|=larg);
+       case SSL_CTRL_MODE:
+               return(ctx->mode|=larg);
        default:
                return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
                }
@@ -977,10 +1031,11 @@ SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
        ret->verify_mode=SSL_VERIFY_NONE;
        ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
        ret->default_verify_callback=NULL;
-       if ((ret->default_cert=ssl_cert_new()) == NULL)
+       if ((ret->cert=ssl_cert_new()) == NULL)
                goto err;
 
        ret->default_passwd_callback=NULL;
+       ret->default_passwd_callback_userdata=NULL;
        ret->client_cert_cb=NULL;
 
        ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
@@ -1064,8 +1119,8 @@ void SSL_CTX_free(SSL_CTX *a)
                sk_SSL_CIPHER_free(a->cipher_list);
        if (a->cipher_list_by_id != NULL)
                sk_SSL_CIPHER_free(a->cipher_list_by_id);
-       if (a->default_cert != NULL)
-               ssl_cert_free(a->default_cert);
+       if (a->cert != NULL)
+               ssl_cert_free(a->cert);
        if (a->client_CA != NULL)
                sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
        if (a->extra_certs != NULL)
@@ -1075,15 +1130,25 @@ void SSL_CTX_free(SSL_CTX *a)
        Free((char *)a);
        }
 
-void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
+void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
        {
        ctx->default_passwd_callback=cb;
        }
 
-void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
+void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
+       {
+       ctx->default_passwd_callback_userdata=u;
+       }
+
+void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
        {
+       /* now
+        *     int (*cb)(X509_STORE_CTX *),
+        * but should be
+        *     int (*cb)(X509_STORE_CTX *, void *arg)
+        */
        ctx->app_verify_callback=cb;
-       ctx->app_verify_arg=arg;
+       ctx->app_verify_arg=arg; /* never used */
        }
 
 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
@@ -1099,10 +1164,7 @@ void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
        ctx->verify_depth=depth;
        }
 
-/* Need default_cert to check for callbacks, for now (see comment in CERT
-   strucure)
-*/
-void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
+void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
        {
        CERT_PKEY *cpk;
        int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
@@ -1115,15 +1177,15 @@ void ssl_set_cert_masks(CERT *c,CERT *default_cert,SSL_CIPHER *cipher)
        kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
 
 #ifndef NO_RSA
-       rsa_tmp=(c->rsa_tmp != NULL || default_cert->rsa_tmp_cb != NULL);
-       rsa_tmp_export=(default_cert->rsa_tmp_cb != NULL ||
+       rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
+       rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
                (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
 #else
        rsa_tmp=rsa_tmp_export=0;
 #endif
 #ifndef NO_DH
-       dh_tmp=(c->dh_tmp != NULL || default_cert->dh_tmp_cb != NULL);
-       dh_tmp_export=(default_cert->dh_tmp_cb != NULL ||
+       dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
+       dh_tmp_export=(c->dh_tmp_cb != NULL ||
                (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
 #else
        dh_tmp=dh_tmp_export=0;
@@ -1207,13 +1269,13 @@ X509 *ssl_get_server_send_cert(SSL *s)
        {
        unsigned long alg,mask,kalg;
        CERT *c;
-       int i,export;
+       int i,is_export;
 
        c=s->cert;
-       ssl_set_cert_masks(c,s->ctx->default_cert,s->s3->tmp.new_cipher);
+       ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
        alg=s->s3->tmp.new_cipher->algorithms;
-       export=SSL_IS_EXPORT(alg);
-       mask=export?c->export_mask:c->mask;
+       is_export=SSL_IS_EXPORT(alg);
+       mask=is_export?c->export_mask:c->mask;
        kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
 
        if      (kalg & SSL_kDHr)
@@ -1353,6 +1415,15 @@ int SSL_get_error(SSL *s,int i)
                if (BIO_should_read(bio))
                        return(SSL_ERROR_WANT_READ);
                else if (BIO_should_write(bio))
+                       /* This one doesn't make too much sense ... We never try
+                        * to write to the rbio, and an application program where
+                        * rbio and wbio are separate couldn't even know what it
+                        * should wait for.
+                        * However if we ever set s->rwstate incorrectly
+                        * (so that we have SSL_want_read(s) instead of
+                        * SSL_want_write(s)) and rbio and wbio *are* the same,
+                        * this test works around that bug; so it might be safer
+                        * to keep it. */
                        return(SSL_ERROR_WANT_WRITE);
                else if (BIO_should_io_special(bio))
                        {
@@ -1370,6 +1441,7 @@ int SSL_get_error(SSL *s,int i)
                if (BIO_should_write(bio))
                        return(SSL_ERROR_WANT_WRITE);
                else if (BIO_should_read(bio))
+                       /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
                        return(SSL_ERROR_WANT_READ);
                else if (BIO_should_io_special(bio))
                        {
@@ -1468,17 +1540,40 @@ char *SSL_get_version(SSL *s)
        }
 
 SSL *SSL_dup(SSL *s)
-        {
+       {
        STACK_OF(X509_NAME) *sk;
        X509_NAME *xn;
-        SSL *ret;
+       SSL *ret;
        int i;
                 
        if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
            return(NULL);
                          
-       /* This copies version, session-id, SSL_METHOD and 'cert' */
-       SSL_copy_session_id(ret,s);
+       if (s->session != NULL)
+               {
+               /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
+               SSL_copy_session_id(ret,s);
+               }
+       else
+               {
+               /* No session has been established yet, so we have to expect
+                * that s->cert or ret->cert will be changed later --
+                * they should not both point to the same object,
+                * and thus we can't use SSL_copy_session_id. */
+
+               ret->method = s->method;
+               ret->method->ssl_new(ret);
+
+               if (s->cert != NULL)
+                       {
+                       ret->cert = ssl_cert_dup(s->cert);
+                       if (ret->cert == NULL)
+                               goto err;
+                       }
+                               
+               SSL_set_session_id_context(ret,
+                       s->sid_ctx, s->sid_ctx_length);
+               }
 
        SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
        SSL_set_verify(ret,SSL_get_verify_mode(s),
@@ -1554,18 +1649,18 @@ err:
 
 void ssl_clear_cipher_ctx(SSL *s)
        {
-        if (s->enc_read_ctx != NULL)
-                {
-                EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
-                Free(s->enc_read_ctx);
-                s->enc_read_ctx=NULL;
-                }
-        if (s->enc_write_ctx != NULL)
-                {
-                EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
-                Free(s->enc_write_ctx);
-                s->enc_write_ctx=NULL;
-                }
+       if (s->enc_read_ctx != NULL)
+               {
+               EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
+               Free(s->enc_read_ctx);
+               s->enc_read_ctx=NULL;
+               }
+       if (s->enc_write_ctx != NULL)
+               {
+               EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
+               Free(s->enc_write_ctx);
+               s->enc_write_ctx=NULL;
+               }
        if (s->expand != NULL)
                {
                COMP_CTX_free(s->expand);
@@ -1598,9 +1693,9 @@ EVP_PKEY *SSL_get_privatekey(SSL *s)
 
 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
        {
-        if ((s->session != NULL) && (s->session->cipher != NULL))
-                return(s->session->cipher);
-        return(NULL);
+       if ((s->session != NULL) && (s->session->cipher != NULL))
+               return(s->session->cipher);
+       return(NULL);
        }
 
 int ssl_init_wbio_buffer(SSL *s,int push)
@@ -1619,7 +1714,7 @@ int ssl_init_wbio_buffer(SSL *s,int push)
                if (s->bbio == s->wbio)
                        s->wbio=BIO_pop(s->wbio);
                }
-       BIO_reset(bbio);
+       (void)BIO_reset(bbio);
 /*     if (!BIO_set_write_buffer_size(bbio,16*1024)) */
        if (!BIO_set_read_buffer_size(bbio,1))
                {
@@ -1704,7 +1799,8 @@ int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
        return(X509_STORE_set_default_paths(ctx->cert_store));
        }
 
-int SSL_CTX_load_verify_locations(SSL_CTX *ctx,char *CAfile,char *CApath)
+int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
+               const char *CApath)
        {
        return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
        }
@@ -1737,11 +1833,11 @@ long SSL_get_verify_result(SSL *ssl)
 
 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
                         int (*dup_func)(),void (*free_func)())
-        {
+       {
        ssl_meth_num++;
        return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
                &ssl_meth,argl,argp,new_func,dup_func,free_func));
-        }
+       }
 
 int SSL_set_ex_data(SSL *s,int idx,void *arg)
        {
@@ -1755,11 +1851,11 @@ void *SSL_get_ex_data(SSL *s,int idx)
 
 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
                             int (*dup_func)(),void (*free_func)())
-        {
+       {
        ssl_ctx_meth_num++;
        return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
                &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
-        }
+       }
 
 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
        {
@@ -1800,13 +1896,14 @@ int SSL_want(SSL *s)
  */
 
 #ifndef NO_RSA
-void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
+void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
+                                                         int is_export,
                                                          int keylength))
     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
 #endif
 
 #ifndef NO_RSA
-void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
+void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int is_export,
                                                          int keylength))
     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
 #endif
@@ -1815,14 +1912,14 @@ void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
 /*!
  * \brief The RSA temporary key callback function.
  * \param ssl the SSL session.
- * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
- * \param keylength if \c export is \c TRUE, then \c keylength is the size of
- * the required key in bits.
+ * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
+ * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
+ * of the required key in bits.
  * \return the temporary RSA key.
  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
  */
 
-RSA *cb(SSL *ssl,int export,int keylength)
+RSA *cb(SSL *ssl,int is_export,int keylength)
     {}
 #endif
 
@@ -1833,11 +1930,11 @@ RSA *cb(SSL *ssl,int export,int keylength)
  */
 
 #ifndef NO_DH
-void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
+void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
                                                        int keylength))
     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
 
-void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
+void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
                                                        int keylength))
     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
 #endif