added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1477 insertions, 0 deletions

diff --git a/trunk/ext/openssl/ossl_ssl.c b/trunk/ext/openssl/ossl_ssl.c
new file mode 100644
index 0000000000..83fd2566d5
--- /dev/null
+++ b/trunk/ext/openssl/ossl_ssl.c
@@ -0,0 +1,1477 @@
+/*
+ * $Id$
+ * 'OpenSSL for Ruby' project
+ * Copyright (C) 2000-2002  GOTOU Yuuzou <gotoyuzo@notwork.org>
+ * Copyright (C) 2001-2002  Michal Rokos <m.rokos@sh.cvut.cz>
+ * Copyright (C) 2001-2007  Technorama Ltd. <oss-ruby@technorama.net>
+ * All rights reserved.
+ */
+/*
+ * This program is licenced under the same licence as Ruby.
+ * (See the file 'LICENCE'.)
+ */
+#include "ossl.h"
+#include <rubysig.h>
+#include <rubyio.h>
+
+#if defined(HAVE_UNISTD_H)
+#  include <unistd.h> /* for read(), and write() */
+#endif
+
+#define numberof(ary) (sizeof(ary)/sizeof(ary[0]))
+
+#ifdef _WIN32
+#  define TO_SOCKET(s) _get_osfhandle(s)
+#else
+#  define TO_SOCKET(s) s
+#endif
+
+VALUE mSSL;
+VALUE eSSLError;
+VALUE cSSLContext;
+VALUE cSSLSocket;
+
+#define ossl_sslctx_set_cert(o,v)        rb_iv_set((o),"@cert",(v))
+#define ossl_sslctx_set_key(o,v)         rb_iv_set((o),"@key",(v))
+#define ossl_sslctx_set_client_ca(o,v)   rb_iv_set((o),"@client_ca",(v))
+#define ossl_sslctx_set_ca_file(o,v)     rb_iv_set((o),"@ca_file",(v))
+#define ossl_sslctx_set_ca_path(o,v)     rb_iv_set((o),"@ca_path",(v))
+#define ossl_sslctx_set_timeout(o,v)     rb_iv_set((o),"@timeout",(v))
+#define ossl_sslctx_set_verify_mode(o,v) rb_iv_set((o),"@verify_mode",(v))
+#define ossl_sslctx_set_verify_dep(o,v)  rb_iv_set((o),"@verify_depth",(v))
+#define ossl_sslctx_set_verify_cb(o,v)   rb_iv_set((o),"@verify_callback",(v))
+#define ossl_sslctx_set_options(o,v)     rb_iv_set((o),"@options",(v))
+#define ossl_sslctx_set_cert_store(o,v)  rb_iv_set((o),"@cert_store",(v))
+#define ossl_sslctx_set_extra_cert(o,v)  rb_iv_set((o),"@extra_chain_cert",(v))
+#define ossl_sslctx_set_client_cert_cb(o,v) rb_iv_set((o),"@client_cert_cb",(v))
+#define ossl_sslctx_set_tmp_dh_cb(o,v)   rb_iv_set((o),"@tmp_dh_callback",(v))
+#define ossl_sslctx_set_sess_id_ctx(o, v) rb_iv_get((o),"@session_id_context"(v))
+
+#define ossl_sslctx_get_cert(o)          rb_iv_get((o),"@cert")
+#define ossl_sslctx_get_key(o)           rb_iv_get((o),"@key")
+#define ossl_sslctx_get_client_ca(o)     rb_iv_get((o),"@client_ca")
+#define ossl_sslctx_get_ca_file(o)       rb_iv_get((o),"@ca_file")
+#define ossl_sslctx_get_ca_path(o)       rb_iv_get((o),"@ca_path")
+#define ossl_sslctx_get_timeout(o)       rb_iv_get((o),"@timeout")
+#define ossl_sslctx_get_verify_mode(o)   rb_iv_get((o),"@verify_mode")
+#define ossl_sslctx_get_verify_dep(o)    rb_iv_get((o),"@verify_depth")
+#define ossl_sslctx_get_verify_cb(o)     rb_iv_get((o),"@verify_callback")
+#define ossl_sslctx_get_options(o)       rb_iv_get((o),"@options")
+#define ossl_sslctx_get_cert_store(o)    rb_iv_get((o),"@cert_store")
+#define ossl_sslctx_get_extra_cert(o)    rb_iv_get((o),"@extra_chain_cert")
+#define ossl_sslctx_get_client_cert_cb(o) rb_iv_get((o),"@client_cert_cb")
+#define ossl_sslctx_get_tmp_dh_cb(o)     rb_iv_get((o),"@tmp_dh_callback")
+#define ossl_sslctx_get_sess_id_ctx(o)   rb_iv_get((o),"@session_id_context")
+
+static const char *ossl_sslctx_attrs[] = {
+    "cert", "key", "client_ca", "ca_file", "ca_path",
+    "timeout", "verify_mode", "verify_depth",
+    "verify_callback", "options", "cert_store", "extra_chain_cert",
+    "client_cert_cb", "tmp_dh_callback", "session_id_context",
+    "session_get_cb", "session_new_cb", "session_remove_cb",
+};
+
+#define ossl_ssl_get_io(o)           rb_iv_get((o),"@io")
+#define ossl_ssl_get_ctx(o)          rb_iv_get((o),"@context")
+#define ossl_ssl_get_sync_close(o)   rb_iv_get((o),"@sync_close")
+#define ossl_ssl_get_x509(o)         rb_iv_get((o),"@x509")
+#define ossl_ssl_get_key(o)          rb_iv_get((o),"@key")
+#define ossl_ssl_get_tmp_dh(o)       rb_iv_get((o),"@tmp_dh")
+
+#define ossl_ssl_set_io(o,v)         rb_iv_set((o),"@io",(v))
+#define ossl_ssl_set_ctx(o,v)        rb_iv_set((o),"@context",(v))
+#define ossl_ssl_set_sync_close(o,v) rb_iv_set((o),"@sync_close",(v))
+#define ossl_ssl_set_x509(o,v)       rb_iv_set((o),"@x509",(v))
+#define ossl_ssl_set_key(o,v)        rb_iv_set((o),"@key",(v))
+#define ossl_ssl_set_tmp_dh(o,v)     rb_iv_set((o),"@tmp_dh",(v))
+
+static const char *ossl_ssl_attr_readers[] = { "io", "context", };
+static const char *ossl_ssl_attrs[] = { "sync_close", };
+
+ID ID_callback_state;
+
+/*
+ * SSLContext class
+ */
+struct {
+    const char *name;
+    SSL_METHOD *(*func)(void);
+} ossl_ssl_method_tab[] = {
+#define OSSL_SSL_METHOD_ENTRY(name) { #name, name##_method }
+    OSSL_SSL_METHOD_ENTRY(TLSv1),
+    OSSL_SSL_METHOD_ENTRY(TLSv1_server),
+    OSSL_SSL_METHOD_ENTRY(TLSv1_client),
+    OSSL_SSL_METHOD_ENTRY(SSLv2),
+    OSSL_SSL_METHOD_ENTRY(SSLv2_server),
+    OSSL_SSL_METHOD_ENTRY(SSLv2_client),
+    OSSL_SSL_METHOD_ENTRY(SSLv3),
+    OSSL_SSL_METHOD_ENTRY(SSLv3_server),
+    OSSL_SSL_METHOD_ENTRY(SSLv3_client),
+    OSSL_SSL_METHOD_ENTRY(SSLv23),
+    OSSL_SSL_METHOD_ENTRY(SSLv23_server),
+    OSSL_SSL_METHOD_ENTRY(SSLv23_client),
+#undef OSSL_SSL_METHOD_ENTRY
+};
+
+int ossl_ssl_ex_vcb_idx;
+int ossl_ssl_ex_store_p;
+int ossl_ssl_ex_ptr_idx;
+int ossl_ssl_ex_client_cert_cb_idx;
+int ossl_ssl_ex_tmp_dh_callback_idx;
+
+static void
+ossl_sslctx_free(SSL_CTX *ctx)
+{
+    if(ctx && SSL_CTX_get_ex_data(ctx, ossl_ssl_ex_store_p)== (void*)1)
+	ctx->cert_store = NULL;
+    SSL_CTX_free(ctx);
+}
+
+static VALUE
+ossl_sslctx_s_alloc(VALUE klass)
+{
+    SSL_CTX *ctx;
+
+    ctx = SSL_CTX_new(SSLv23_method());
+    if (!ctx) {
+        ossl_raise(eSSLError, "SSL_CTX_new:");
+    }
+    SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE);
+    SSL_CTX_set_options(ctx, SSL_OP_ALL);
+    return Data_Wrap_Struct(klass, 0, ossl_sslctx_free, ctx);
+}
+
+static VALUE
+ossl_sslctx_set_ssl_version(VALUE self, VALUE ssl_method)
+{
+    SSL_METHOD *method = NULL;
+    const char *s;
+    int i;
+
+    SSL_CTX *ctx;
+    if(TYPE(ssl_method) == T_SYMBOL)
+	s = rb_id2name(SYM2ID(ssl_method));
+    else
+	s =  StringValuePtr(ssl_method);
+    for (i = 0; i < numberof(ossl_ssl_method_tab); i++) {
+        if (strcmp(ossl_ssl_method_tab[i].name, s) == 0) {
+            method = ossl_ssl_method_tab[i].func();
+            break;
+        }
+    }
+    if (!method) {
+        ossl_raise(rb_eArgError, "unknown SSL method `%s'.", s);
+    }
+    Data_Get_Struct(self, SSL_CTX, ctx);
+    if (SSL_CTX_set_ssl_version(ctx, method) != 1) {
+        ossl_raise(eSSLError, "SSL_CTX_set_ssl_version:");
+    }
+
+    return ssl_method;
+}
+
+/*
+ * call-seq:
+ *    SSLContext.new => ctx
+ *    SSLContext.new(:TLSv1) => ctx
+ *    SSLContext.new("SSLv23_client") => ctx
+ *
+ * You can get a list of valid methods with OpenSSL::SSL::SSLContext::METHODS
+ */
+static VALUE
+ossl_sslctx_initialize(int argc, VALUE *argv, VALUE self)
+{
+    VALUE ssl_method;
+    int i;
+
+    for(i = 0; i < numberof(ossl_sslctx_attrs); i++){
+	char buf[32];
+	snprintf(buf, sizeof(buf), "@%s", ossl_sslctx_attrs[i]);
+	rb_iv_set(self, buf, Qnil);
+    }
+    if (rb_scan_args(argc, argv, "01", &ssl_method) == 0){
+        return self;
+    }
+    ossl_sslctx_set_ssl_version(self, ssl_method);
+
+    return self;
+}
+
+static VALUE
+ossl_call_client_cert_cb(VALUE obj)
+{
+    VALUE cb, ary, cert, key;
+    SSL *ssl;
+
+    Data_Get_Struct(obj, SSL, ssl);
+    cb = (VALUE)SSL_get_ex_data(ssl, ossl_ssl_ex_client_cert_cb_idx);
+    if (NIL_P(cb)) return Qfalse;
+    ary = rb_funcall(cb, rb_intern("call"), 1, obj);
+    Check_Type(ary, T_ARRAY);
+    GetX509CertPtr(cert = rb_ary_entry(ary, 0));
+    GetPKeyPtr(key = rb_ary_entry(ary, 1));
+    ossl_ssl_set_x509(obj, cert);
+    ossl_ssl_set_key(obj, key);
+
+    return Qtrue;
+}
+
+static int
+ossl_client_cert_cb(SSL *ssl, X509 **x509, EVP_PKEY **pkey)
+{
+    VALUE obj;
+    int status, success;
+
+    obj = (VALUE)SSL_get_ex_data(ssl, ossl_ssl_ex_ptr_idx);
+    success = rb_protect((VALUE(*)_((VALUE)))ossl_call_client_cert_cb,
+                         obj, &status);
+    if (status || !success) return 0;
+    *x509 = DupX509CertPtr(ossl_ssl_get_x509(obj));
+    *pkey = DupPKeyPtr(ossl_ssl_get_key(obj));
+
+    return 1;
+}
+
+#if !defined(OPENSSL_NO_DH)
+static VALUE
+ossl_call_tmp_dh_callback(VALUE *args)
+{
+    SSL *ssl;
+    VALUE cb, dh;
+    EVP_PKEY *pkey;
+
+    Data_Get_Struct(args[0], SSL, ssl);
+    cb = (VALUE)SSL_get_ex_data(ssl, ossl_ssl_ex_tmp_dh_callback_idx);
+    if (NIL_P(cb)) return Qfalse;
+    dh = rb_funcall(cb, rb_intern("call"), 3, args[0], args[1], args[2]);
+    pkey = GetPKeyPtr(dh);
+    if (EVP_PKEY_type(pkey->type) != EVP_PKEY_DH) return Qfalse;
+    ossl_ssl_set_tmp_dh(args[0], dh);
+
+    return Qtrue;
+}
+
+static DH*
+ossl_tmp_dh_callback(SSL *ssl, int is_export, int keylength)
+{
+    VALUE args[3];
+    int status, success;
+
+    args[0] = (VALUE)SSL_get_ex_data(ssl, ossl_ssl_ex_ptr_idx);
+    args[1] = INT2FIX(is_export);
+    args[2] = INT2FIX(keylength);
+    success = rb_protect((VALUE(*)_((VALUE)))ossl_call_tmp_dh_callback,
+                         (VALUE)args, &status);
+    if (status || !success) return NULL;
+
+    return GetPKeyPtr(ossl_ssl_get_tmp_dh(args[0]))->pkey.dh;
+}
+
+static DH*
+ossl_default_tmp_dh_callback(SSL *ssl, int is_export, int keylength)
+{
+    rb_warning("using default DH parameters.");
+
+    switch(keylength){
+    case 512:
+	return OSSL_DEFAULT_DH_512;
+    case 1024:
+	return OSSL_DEFAULT_DH_1024;
+    }
+    return NULL;
+}
+#endif /* OPENSSL_NO_DH */
+
+static int
+ossl_ssl_verify_callback(int preverify_ok, X509_STORE_CTX *ctx)
+{
+    VALUE cb;
+    SSL *ssl;
+
+    ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
+    cb = (VALUE)SSL_get_ex_data(ssl, ossl_ssl_ex_vcb_idx);
+    X509_STORE_CTX_set_ex_data(ctx, ossl_verify_cb_idx, (void*)cb);
+    return ossl_verify_cb(preverify_ok, ctx);
+}
+
+static VALUE
+ossl_call_session_get_cb(VALUE ary)
+{
+    VALUE ssl_obj, sslctx_obj, cb;
+    
+    Check_Type(ary, T_ARRAY);
+    ssl_obj = rb_ary_entry(ary, 0);
+
+    sslctx_obj = rb_iv_get(ssl_obj, "@context");
+    if (NIL_P(sslctx_obj)) return Qnil;
+    cb = rb_iv_get(sslctx_obj, "@session_get_cb");
+    if (NIL_P(cb)) return Qnil;
+
+    return rb_funcall(cb, rb_intern("call"), 1, ary);
+}
+
+/* this method is currently only called for servers (in OpenSSL <= 0.9.8e) */
+static SSL_SESSION *
+ossl_sslctx_session_get_cb(SSL *ssl, unsigned char *buf, int len, int *copy)
+{
+    VALUE ary, ssl_obj, ret_obj;
+    SSL_SESSION *sess;
+    void *ptr;
+    int state = 0;
+
+    OSSL_Debug("SSL SESSION get callback entered");
+    if ((ptr = SSL_get_ex_data(ssl, ossl_ssl_ex_ptr_idx)) == NULL)
+    	return NULL;
+    ssl_obj = (VALUE)ptr;
+    ary = rb_ary_new2(2);
+    rb_ary_push(ary, ssl_obj);
+    rb_ary_push(ary, rb_str_new((const char *)buf, len));
+
+    ret_obj = rb_protect((VALUE(*)_((VALUE)))ossl_call_session_get_cb, ary, &state);
+    if (state) {
+        rb_ivar_set(ssl_obj, ID_callback_state, INT2NUM(state));
+        return NULL;
+    }
+    if (!rb_obj_is_instance_of(ret_obj, cSSLSession))
+        return NULL;
+
+    SafeGetSSLSession(ret_obj, sess);
+    *copy = 1;
+
+    return sess;
+}
+
+static VALUE
+ossl_call_session_new_cb(VALUE ary)
+{
+    VALUE ssl_obj, sslctx_obj, cb;
+    
+    Check_Type(ary, T_ARRAY);
+    ssl_obj = rb_ary_entry(ary, 0);
+
+    sslctx_obj = rb_iv_get(ssl_obj, "@context");
+    if (NIL_P(sslctx_obj)) return Qnil;
+    cb = rb_iv_get(sslctx_obj, "@session_new_cb");
+    if (NIL_P(cb)) return Qnil;
+
+    return rb_funcall(cb, rb_intern("call"), 1, ary);
+}
+
+/* return 1 normal.  return 0 removes the session */
+static int
+ossl_sslctx_session_new_cb(SSL *ssl, SSL_SESSION *sess)
+{
+    VALUE ary, ssl_obj, sess_obj, ret_obj;
+    void *ptr;
+    int state = 0;
+
+    OSSL_Debug("SSL SESSION new callback entered");
+
+    if ((ptr = SSL_get_ex_data(ssl, ossl_ssl_ex_ptr_idx)) == NULL)
+    	return 1;
+    ssl_obj = (VALUE)ptr;
+    sess_obj = rb_obj_alloc(cSSLSession);
+    CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
+    DATA_PTR(sess_obj) = sess;
+
+    ary = rb_ary_new2(2);
+    rb_ary_push(ary, ssl_obj);
+    rb_ary_push(ary, sess_obj);
+
+    ret_obj = rb_protect((VALUE(*)_((VALUE)))ossl_call_session_new_cb, ary, &state);
+    if (state) {
+        rb_ivar_set(ssl_obj, ID_callback_state, INT2NUM(state));
+        return 0; /* what should be returned here??? */
+    }
+
+    return RTEST(ret_obj) ? 1 : 0;
+}
+
+#if 0				/* unused */
+static VALUE
+ossl_call_session_remove_cb(VALUE ary)
+{
+    VALUE sslctx_obj, cb;
+    
+    Check_Type(ary, T_ARRAY);
+    sslctx_obj = rb_ary_entry(ary, 0);
+
+    cb = rb_iv_get(sslctx_obj, "@session_remove_cb");
+    if (NIL_P(cb)) return Qnil;
+
+    return rb_funcall(cb, rb_intern("call"), 1, ary);
+}
+#endif
+
+static void
+ossl_sslctx_session_remove_cb(SSL_CTX *ctx, SSL_SESSION *sess)
+{
+    VALUE ary, sslctx_obj, sess_obj, ret_obj;
+    void *ptr;
+    int state = 0;
+
+    OSSL_Debug("SSL SESSION remove callback entered");
+
+    if ((ptr = SSL_CTX_get_ex_data(ctx, ossl_ssl_ex_ptr_idx)) == NULL)
+    	return;
+    sslctx_obj = (VALUE)ptr;
+    sess_obj = rb_obj_alloc(cSSLSession);
+    CRYPTO_add(&sess->references, 1, CRYPTO_LOCK_SSL_SESSION);
+    DATA_PTR(sess_obj) = sess;
+
+    ary = rb_ary_new2(2);
+    rb_ary_push(ary, sslctx_obj);
+    rb_ary_push(ary, sess_obj);
+
+    ret_obj = rb_protect((VALUE(*)_((VALUE)))ossl_call_session_new_cb, ary, &state);
+    if (state) {
+/*
+  the SSL_CTX is frozen, nowhere to save state.
+  there is no common accessor method to check it either.
+        rb_ivar_set(sslctx_obj, ID_callback_state, INT2NUM(state));
+*/
+    }
+}
+
+static VALUE
+ossl_sslctx_add_extra_chain_cert_i(VALUE i, VALUE arg)
+{
+    X509 *x509;
+    SSL_CTX *ctx;
+
+    Data_Get_Struct(arg, SSL_CTX, ctx);
+    x509 = DupX509CertPtr(i);
+    if(!SSL_CTX_add_extra_chain_cert(ctx, x509)){
+	ossl_raise(eSSLError, NULL);
+    }
+
+    return i;
+}
+
+/*
+ * call-seq:
+ *    ctx.setup => Qtrue # first time
+ *    ctx.setup => nil # thereafter
+ *
+ * This method is called automatically when a new SSLSocket is created.
+ * Normally you do not need to call this method (unless you are writing an extension in C).
+ */
+static VALUE
+ossl_sslctx_setup(VALUE self)
+{
+    SSL_CTX *ctx;
+    X509 *cert = NULL, *client_ca = NULL;
+    X509_STORE *store;
+    EVP_PKEY *key = NULL;
+    char *ca_path = NULL, *ca_file = NULL;
+    int i, verify_mode;
+    VALUE val;
+
+    if(OBJ_FROZEN(self)) return Qnil;
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+#if !defined(OPENSSL_NO_DH)
+    if (RTEST(ossl_sslctx_get_tmp_dh_cb(self))){
+	SSL_CTX_set_tmp_dh_callback(ctx, ossl_tmp_dh_callback);
+    }
+    else{
+	SSL_CTX_set_tmp_dh_callback(ctx, ossl_default_tmp_dh_callback);
+    }
+#endif
+    SSL_CTX_set_ex_data(ctx, ossl_ssl_ex_ptr_idx, (void*)self);
+
+    val = ossl_sslctx_get_cert_store(self);
+    if(!NIL_P(val)){
+	/*
+         * WORKAROUND:
+	 *   X509_STORE can count references, but
+	 *   X509_STORE_free() doesn't care it.
+	 *   So we won't increment it but mark it by ex_data.
+	 */
+        store = GetX509StorePtr(val); /* NO NEED TO DUP */
+        SSL_CTX_set_cert_store(ctx, store);
+        SSL_CTX_set_ex_data(ctx, ossl_ssl_ex_store_p, (void*)1);
+    }
+
+    val = ossl_sslctx_get_extra_cert(self);
+    if(!NIL_P(val)){
+	rb_block_call(val, rb_intern("each"), 0, 0, ossl_sslctx_add_extra_chain_cert_i, self);
+    }
+
+    /* private key may be bundled in certificate file. */
+    val = ossl_sslctx_get_cert(self);
+    cert = NIL_P(val) ? NULL : GetX509CertPtr(val); /* NO DUP NEEDED */
+    val = ossl_sslctx_get_key(self);
+    key = NIL_P(val) ? NULL : GetPKeyPtr(val); /* NO DUP NEEDED */
+    if (cert && key) {
+        if (!SSL_CTX_use_certificate(ctx, cert)) {
+            /* Adds a ref => Safe to FREE */
+            ossl_raise(eSSLError, "SSL_CTX_use_certificate:");
+        }
+        if (!SSL_CTX_use_PrivateKey(ctx, key)) {
+            /* Adds a ref => Safe to FREE */
+            ossl_raise(eSSLError, "SSL_CTX_use_PrivateKey:");
+        }
+        if (!SSL_CTX_check_private_key(ctx)) {
+            ossl_raise(eSSLError, "SSL_CTX_check_private_key:");
+        }
+    }
+
+    val = ossl_sslctx_get_client_ca(self);
+    if(!NIL_P(val)){
+	if(TYPE(val) == T_ARRAY){
+	    for(i = 0; i < RARRAY_LEN(val); i++){
+		client_ca = GetX509CertPtr(RARRAY_PTR(val)[i]);
+        	if (!SSL_CTX_add_client_CA(ctx, client_ca)){
+		    /* Copies X509_NAME => FREE it. */
+        	    ossl_raise(eSSLError, "SSL_CTX_add_client_CA");
+        	}
+	    }
+        }
+	else{
+	    client_ca = GetX509CertPtr(val); /* NO DUP NEEDED. */
+            if (!SSL_CTX_add_client_CA(ctx, client_ca)){
+		/* Copies X509_NAME => FREE it. */
+        	ossl_raise(eSSLError, "SSL_CTX_add_client_CA");
+            }
+	}
+    }
+
+    val = ossl_sslctx_get_ca_file(self);
+    ca_file = NIL_P(val) ? NULL : StringValuePtr(val);
+    val = ossl_sslctx_get_ca_path(self);
+    ca_path = NIL_P(val) ? NULL : StringValuePtr(val);
+    if(ca_file || ca_path){
+	if (!SSL_CTX_load_verify_locations(ctx, ca_file, ca_path))
+	    rb_warning("can't set verify locations");
+    }
+
+    val = ossl_sslctx_get_verify_mode(self);
+    verify_mode = NIL_P(val) ? SSL_VERIFY_NONE : NUM2INT(val);
+    SSL_CTX_set_verify(ctx, verify_mode, ossl_ssl_verify_callback);
+    if (RTEST(ossl_sslctx_get_client_cert_cb(self)))
+	SSL_CTX_set_client_cert_cb(ctx, ossl_client_cert_cb);
+
+    val = ossl_sslctx_get_timeout(self);
+    if(!NIL_P(val)) SSL_CTX_set_timeout(ctx, NUM2LONG(val));
+
+    val = ossl_sslctx_get_verify_dep(self);
+    if(!NIL_P(val)) SSL_CTX_set_verify_depth(ctx, NUM2LONG(val));
+
+    val = ossl_sslctx_get_options(self);
+    if(!NIL_P(val)) SSL_CTX_set_options(ctx, NUM2LONG(val));
+    rb_obj_freeze(self);
+
+    val = ossl_sslctx_get_sess_id_ctx(self);
+    if (!NIL_P(val)){
+	StringValue(val);
+	if (!SSL_CTX_set_session_id_context(ctx, (unsigned char *)RSTRING_PTR(val),
+					    RSTRING_LEN(val))){
+	    ossl_raise(eSSLError, "SSL_CTX_set_session_id_context:");
+	}
+    }
+
+    if (RTEST(rb_iv_get(self, "@session_get_cb"))) {
+	SSL_CTX_sess_set_get_cb(ctx, ossl_sslctx_session_get_cb);
+	OSSL_Debug("SSL SESSION get callback added");
+    }
+    if (RTEST(rb_iv_get(self, "@session_new_cb"))) {
+	SSL_CTX_sess_set_new_cb(ctx, ossl_sslctx_session_new_cb);
+	OSSL_Debug("SSL SESSION new callback added");
+    }
+    if (RTEST(rb_iv_get(self, "@session_remove_cb"))) {
+	SSL_CTX_sess_set_remove_cb(ctx, ossl_sslctx_session_remove_cb);
+	OSSL_Debug("SSL SESSION remove callback added");
+    }
+    return Qtrue;
+}
+
+static VALUE
+ossl_ssl_cipher_to_ary(SSL_CIPHER *cipher)
+{
+    VALUE ary;
+    int bits, alg_bits;
+
+    ary = rb_ary_new2(4);
+    rb_ary_push(ary, rb_str_new2(SSL_CIPHER_get_name(cipher)));
+    rb_ary_push(ary, rb_str_new2(SSL_CIPHER_get_version(cipher)));
+    bits = SSL_CIPHER_get_bits(cipher, &alg_bits);
+    rb_ary_push(ary, INT2FIX(bits));
+    rb_ary_push(ary, INT2FIX(alg_bits));
+
+    return ary;
+}
+
+/*
+ * call-seq:
+ *    ctx.ciphers => [[name, version, bits, alg_bits], ...]
+ */
+static VALUE
+ossl_sslctx_get_ciphers(VALUE self)
+{
+    SSL_CTX *ctx;
+    STACK_OF(SSL_CIPHER) *ciphers;
+    SSL_CIPHER *cipher;
+    VALUE ary;
+    int i, num;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+    if(!ctx){
+        rb_warning("SSL_CTX is not initialized.");
+        return Qnil;
+    }
+    ciphers = ctx->cipher_list;
+
+    if (!ciphers)
+        return rb_ary_new();
+
+    num = sk_num((STACK*)ciphers);
+    ary = rb_ary_new2(num);
+    for(i = 0; i < num; i++){
+        cipher = (SSL_CIPHER*)sk_value((STACK*)ciphers, i);
+        rb_ary_push(ary, ossl_ssl_cipher_to_ary(cipher));
+    }
+    return ary;
+}
+
+/*
+ * call-seq:
+ *    ctx.ciphers = "cipher1:cipher2:..."
+ *    ctx.ciphers = [name, ...]
+ *    ctx.ciphers = [[name, version, bits, alg_bits], ...]
+ */
+static VALUE
+ossl_sslctx_set_ciphers(VALUE self, VALUE v)
+{
+    SSL_CTX *ctx;
+    VALUE str, elem;
+    int i;
+
+    rb_check_frozen(self);
+    if (NIL_P(v))
+	return v;
+    else if (TYPE(v) == T_ARRAY) {
+        str = rb_str_new(0, 0);
+        for (i = 0; i < RARRAY_LEN(v); i++) {
+            elem = rb_ary_entry(v, i);
+            if (TYPE(elem) == T_ARRAY) elem = rb_ary_entry(elem, 0);
+            elem = rb_String(elem);
+            rb_str_append(str, elem);
+            if (i < RARRAY_LEN(v)-1) rb_str_cat2(str, ":");
+        }
+    } else {
+        str = v;
+        StringValue(str);
+    }
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+    if(!ctx){
+        ossl_raise(eSSLError, "SSL_CTX is not initialized.");
+        return Qnil;
+    }
+    if (!SSL_CTX_set_cipher_list(ctx, RSTRING_PTR(str))) {
+        ossl_raise(eSSLError, "SSL_CTX_set_cipher_list:");
+    }
+
+    return v;
+}
+
+
+/*
+ *  call-seq:
+ *     ctx.session_add(session) -> true | false
+ *
+ */
+static VALUE
+ossl_sslctx_session_add(VALUE self, VALUE arg)
+{
+    SSL_CTX *ctx;
+    SSL_SESSION *sess;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+    SafeGetSSLSession(arg, sess);
+
+    return SSL_CTX_add_session(ctx, sess) == 1 ? Qtrue : Qfalse;
+}
+
+/*
+ *  call-seq:
+ *     ctx.session_remove(session) -> true | false
+ *
+ */
+static VALUE
+ossl_sslctx_session_remove(VALUE self, VALUE arg)
+{
+    SSL_CTX *ctx;
+    SSL_SESSION *sess;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+    SafeGetSSLSession(arg, sess);
+
+    return SSL_CTX_remove_session(ctx, sess) == 1 ? Qtrue : Qfalse;
+}
+
+/*
+ *  call-seq:
+ *     ctx.session_cache_mode -> integer
+ *
+ */
+static VALUE
+ossl_sslctx_get_session_cache_mode(VALUE self)
+{
+    SSL_CTX *ctx;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+    return LONG2NUM(SSL_CTX_get_session_cache_mode(ctx));
+}
+
+/*
+ *  call-seq:
+ *     ctx.session_cache_mode=(integer) -> integer
+ *
+ */
+static VALUE
+ossl_sslctx_set_session_cache_mode(VALUE self, VALUE arg)
+{
+    SSL_CTX *ctx;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+    SSL_CTX_set_session_cache_mode(ctx, NUM2LONG(arg));
+
+    return arg;
+}
+
+/*
+ *  call-seq:
+ *     ctx.session_cache_size -> integer
+ *
+ */
+static VALUE
+ossl_sslctx_get_session_cache_size(VALUE self)
+{
+    SSL_CTX *ctx;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+    return LONG2NUM(SSL_CTX_sess_get_cache_size(ctx));
+}
+
+/*
+ *  call-seq:
+ *     ctx.session_cache_size=(integer) -> integer
+ *
+ */
+static VALUE
+ossl_sslctx_set_session_cache_size(VALUE self, VALUE arg)
+{
+    SSL_CTX *ctx;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+    SSL_CTX_sess_set_cache_size(ctx, NUM2LONG(arg));
+
+    return arg;
+}
+
+/*
+ *  call-seq:
+ *     ctx.session_cache_stats -> Hash
+ *
+ */
+static VALUE
+ossl_sslctx_get_session_cache_stats(VALUE self)
+{
+    SSL_CTX *ctx;
+    VALUE hash;
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+    hash = rb_hash_new();
+    rb_hash_aset(hash, ID2SYM(rb_intern("cache_num")), LONG2NUM(SSL_CTX_sess_number(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("connect")), LONG2NUM(SSL_CTX_sess_connect(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("connect_good")), LONG2NUM(SSL_CTX_sess_connect_good(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("connect_renegotiate")), LONG2NUM(SSL_CTX_sess_connect_renegotiate(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("accept")), LONG2NUM(SSL_CTX_sess_accept(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("accept_good")), LONG2NUM(SSL_CTX_sess_accept_good(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("accept_renegotiate")), LONG2NUM(SSL_CTX_sess_accept_renegotiate(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("cache_hits")), LONG2NUM(SSL_CTX_sess_hits(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("cb_hits")), LONG2NUM(SSL_CTX_sess_cb_hits(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("cache_misses")), LONG2NUM(SSL_CTX_sess_misses(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("cache_full")), LONG2NUM(SSL_CTX_sess_cache_full(ctx)));
+    rb_hash_aset(hash, ID2SYM(rb_intern("timeouts")), LONG2NUM(SSL_CTX_sess_timeouts(ctx)));
+
+    return hash;
+}
+
+
+/*
+ *  call-seq:
+ *     ctx.flush_sessions(time | nil) -> self
+ *
+ */
+static VALUE
+ossl_sslctx_flush_sessions(int argc, VALUE *argv, VALUE self)
+{
+    VALUE arg1;
+    SSL_CTX *ctx;
+    time_t tm = 0;
+
+    rb_scan_args(argc, argv, "01", &arg1);
+
+    Data_Get_Struct(self, SSL_CTX, ctx);
+
+    if (NIL_P(arg1)) {
+        tm = time(0);
+    } else if (rb_obj_is_instance_of(arg1, rb_cTime)) {
+        tm = NUM2LONG(rb_funcall(arg1, rb_intern("to_i"), 0));
+    } else {
+        rb_raise(rb_eArgError, "arg must be Time or nil");
+    }
+
+    SSL_CTX_flush_sessions(ctx, tm);
+
+    return self;
+}
+
+/*
+ * SSLSocket class
+ */
+static void
+ossl_ssl_shutdown(SSL *ssl)
+{
+    if (ssl) {
+        SSL_shutdown(ssl);
+        SSL_clear(ssl);
+    }
+}
+
+static void
+ossl_ssl_free(SSL *ssl)
+{
+    ossl_ssl_shutdown(ssl);
+    SSL_free(ssl);
+}
+
+static VALUE
+ossl_ssl_s_alloc(VALUE klass)
+{
+    return Data_Wrap_Struct(klass, 0, ossl_ssl_free, NULL);
+}
+
+/*
+ * call-seq:
+ *    SSLSocket.new(io) => aSSLSocket
+ *    SSLSocket.new(io, ctx) => aSSLSocket
+ *
+ * === Parameters
+ * * +io+ is a real ruby IO object.  Not an IO like object that responds to read/write.
+ * * +ctx+ is an OpenSSLSSL::SSLContext.
+ *
+ * The OpenSSL::Buffering module provides additional IO methods.
+ *
+ * This method will freeze the SSLContext if one is provided;
+ * however, session management is still allowed in the frozen SSLContext.
+ */
+static VALUE
+ossl_ssl_initialize(int argc, VALUE *argv, VALUE self)
+{
+    VALUE io, ctx;
+
+    if (rb_scan_args(argc, argv, "11", &io, &ctx) == 1) {
+        ctx = rb_funcall(cSSLContext, rb_intern("new"), 0);
+    }
+    OSSL_Check_Kind(ctx, cSSLContext);
+    Check_Type(io, T_FILE);
+    ossl_ssl_set_io(self, io);
+    ossl_ssl_set_ctx(self, ctx);
+    ossl_ssl_set_sync_close(self, Qfalse);
+    ossl_sslctx_setup(ctx);
+    rb_call_super(0, 0);
+
+    return self;
+}
+
+static VALUE
+ossl_ssl_setup(VALUE self)
+{
+    VALUE io, v_ctx, cb;
+    SSL_CTX *ctx;
+    SSL *ssl;
+    rb_io_t *fptr;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if(!ssl){
+        v_ctx = ossl_ssl_get_ctx(self);
+        Data_Get_Struct(v_ctx, SSL_CTX, ctx);
+
+        ssl = SSL_new(ctx);
+        if (!ssl) {
+            ossl_raise(eSSLError, "SSL_new:");
+        }
+        DATA_PTR(self) = ssl;
+
+        io = ossl_ssl_get_io(self);
+        GetOpenFile(io, fptr);
+        rb_io_check_readable(fptr);
+        rb_io_check_writable(fptr);
+        SSL_set_fd(ssl, TO_SOCKET(FPTR_TO_FD(fptr)));
+	SSL_set_ex_data(ssl, ossl_ssl_ex_ptr_idx, (void*)self);
+	cb = ossl_sslctx_get_verify_cb(v_ctx);
+	SSL_set_ex_data(ssl, ossl_ssl_ex_vcb_idx, (void*)cb);
+	cb = ossl_sslctx_get_client_cert_cb(v_ctx);
+	SSL_set_ex_data(ssl, ossl_ssl_ex_client_cert_cb_idx, (void*)cb);
+	cb = ossl_sslctx_get_tmp_dh_cb(v_ctx);
+	SSL_set_ex_data(ssl, ossl_ssl_ex_tmp_dh_callback_idx, (void*)cb);
+    }
+
+    return Qtrue;
+}
+
+#ifdef _WIN32
+#define ssl_get_error(ssl, ret) (errno = WSAGetLastError(), SSL_get_error(ssl, ret))
+#else
+#define ssl_get_error(ssl, ret) SSL_get_error(ssl, ret)
+#endif
+
+static VALUE
+ossl_start_ssl(VALUE self, int (*func)(), const char *funcname)
+{
+    SSL *ssl;
+    rb_io_t *fptr;
+    int ret, ret2;
+    VALUE cb_state;
+
+    rb_ivar_set(self, ID_callback_state, Qnil);
+
+    Data_Get_Struct(self, SSL, ssl);
+    GetOpenFile(ossl_ssl_get_io(self), fptr);
+    for(;;){
+	if((ret = func(ssl)) > 0) break;
+	switch((ret2 = ssl_get_error(ssl, ret))){
+	case SSL_ERROR_WANT_WRITE:
+            rb_io_wait_writable(FPTR_TO_FD(fptr));
+            continue;
+	case SSL_ERROR_WANT_READ:
+            rb_io_wait_readable(FPTR_TO_FD(fptr));
+            continue;
+	case SSL_ERROR_SYSCALL:
+	    if (errno) rb_sys_fail(funcname);
+	    ossl_raise(eSSLError, "%s SYSCALL returned=%d errno=%d state=%s", funcname, ret2, errno, SSL_state_string_long(ssl));
+	default:
+	    ossl_raise(eSSLError, "%s returned=%d errno=%d state=%s", funcname, ret2, errno, SSL_state_string_long(ssl));
+	}
+    }
+
+    cb_state = rb_ivar_get(self, ID_callback_state);
+    if (!NIL_P(cb_state))
+        rb_jump_tag(NUM2INT(cb_state));
+
+    return self;
+}
+
+/*
+ * call-seq:
+ *    ssl.connect => self
+ */
+static VALUE
+ossl_ssl_connect(VALUE self)
+{
+    ossl_ssl_setup(self);
+    return ossl_start_ssl(self, SSL_connect, "SSL_connect");
+}
+
+/*
+ * call-seq:
+ *    ssl.accept => self
+ */
+static VALUE
+ossl_ssl_accept(VALUE self)
+{
+    ossl_ssl_setup(self);
+    return ossl_start_ssl(self, SSL_accept, "SSL_accept");
+}
+
+/*
+ * call-seq:
+ *    ssl.sysread(length) => string
+ *    ssl.sysread(length, buffer) => buffer
+ *
+ * === Parameters
+ * * +length+ is a positive integer.
+ * * +buffer+ is a string used to store the result.
+ */
+static VALUE
+ossl_ssl_read(int argc, VALUE *argv, VALUE self)
+{
+    SSL *ssl;
+    int ilen, nread = 0;
+    VALUE len, str;
+    rb_io_t *fptr;
+
+    rb_scan_args(argc, argv, "11", &len, &str);
+    ilen = NUM2INT(len);
+    if(NIL_P(str)) str = rb_str_new(0, ilen);
+    else{
+        StringValue(str);
+        rb_str_modify(str);
+        rb_str_resize(str, ilen);
+    }
+    if(ilen == 0) return str;
+
+    Data_Get_Struct(self, SSL, ssl);
+    GetOpenFile(ossl_ssl_get_io(self), fptr);
+    if (ssl) {
+	if(SSL_pending(ssl) <= 0)
+	    rb_thread_wait_fd(FPTR_TO_FD(fptr));
+	for (;;){
+	    nread = SSL_read(ssl, RSTRING_PTR(str), RSTRING_LEN(str));
+	    switch(ssl_get_error(ssl, nread)){
+	    case SSL_ERROR_NONE:
+		goto end;
+	    case SSL_ERROR_ZERO_RETURN:
+		rb_eof_error();
+	    case SSL_ERROR_WANT_WRITE:
+                rb_io_wait_writable(FPTR_TO_FD(fptr));
+                continue;
+	    case SSL_ERROR_WANT_READ:
+                rb_io_wait_readable(FPTR_TO_FD(fptr));
+		continue;
+	    case SSL_ERROR_SYSCALL:
+		if(ERR_peek_error() == 0 && nread == 0) rb_eof_error();
+		rb_sys_fail(0);
+	    default:
+		ossl_raise(eSSLError, "SSL_read:");
+	    }
+        }
+    }
+    else {
+        ID id_sysread = rb_intern("sysread");
+        rb_warning("SSL session is not started yet.");
+        return rb_funcall(ossl_ssl_get_io(self), id_sysread, 2, len, str);
+    }
+
+  end:
+    rb_str_set_len(str, nread);
+    OBJ_TAINT(str);
+
+    return str;
+}
+
+/*
+ * call-seq:
+ *    ssl.syswrite(string) => integer
+ */
+static VALUE
+ossl_ssl_write(VALUE self, VALUE str)
+{
+    SSL *ssl;
+    int nwrite = 0;
+    rb_io_t *fptr;
+
+    StringValue(str);
+    Data_Get_Struct(self, SSL, ssl);
+    GetOpenFile(ossl_ssl_get_io(self), fptr);
+
+    if (ssl) {
+	for (;;){
+	    nwrite = SSL_write(ssl, RSTRING_PTR(str), RSTRING_LEN(str));
+	    switch(ssl_get_error(ssl, nwrite)){
+	    case SSL_ERROR_NONE:
+		goto end;
+	    case SSL_ERROR_WANT_WRITE:
+                rb_io_wait_writable(FPTR_TO_FD(fptr));
+                continue;
+	    case SSL_ERROR_WANT_READ:
+                rb_io_wait_readable(FPTR_TO_FD(fptr));
+                continue;
+	    case SSL_ERROR_SYSCALL:
+		if (errno) rb_sys_fail(0);
+	    default:
+		ossl_raise(eSSLError, "SSL_write:");
+	    }
+        }
+    }
+    else {
+        ID id_syswrite = rb_intern("syswrite");
+        rb_warning("SSL session is not started yet.");
+	return rb_funcall(ossl_ssl_get_io(self), id_syswrite, 1, str);
+    }
+
+  end:
+    return INT2NUM(nwrite);
+}
+
+/*
+ * call-seq:
+ *    ssl.sysclose => nil
+ */
+static VALUE
+ossl_ssl_close(VALUE self)
+{
+    SSL *ssl;
+
+    Data_Get_Struct(self, SSL, ssl);
+    ossl_ssl_shutdown(ssl);
+    if (RTEST(ossl_ssl_get_sync_close(self)))
+	rb_funcall(ossl_ssl_get_io(self), rb_intern("close"), 0);
+
+    return Qnil;
+}
+
+/*
+ * call-seq:
+ *    ssl.cert => cert or nil
+ */
+static VALUE
+ossl_ssl_get_cert(VALUE self)
+{
+    SSL *ssl;
+    X509 *cert = NULL;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+
+    /*
+     * Is this OpenSSL bug? Should add a ref?
+     * TODO: Ask for.
+     */
+    cert = SSL_get_certificate(ssl); /* NO DUPs => DON'T FREE. */
+
+    if (!cert) {
+        return Qnil;
+    }
+    return ossl_x509_new(cert);
+}
+
+/*
+ * call-seq:
+ *    ssl.peer_cert => cert or nil
+ */
+static VALUE
+ossl_ssl_get_peer_cert(VALUE self)
+{
+    SSL *ssl;
+    X509 *cert = NULL;
+    VALUE obj;
+
+    Data_Get_Struct(self, SSL, ssl);
+
+    if (!ssl){
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+
+    cert = SSL_get_peer_certificate(ssl); /* Adds a ref => Safe to FREE. */
+
+    if (!cert) {
+        return Qnil;
+    }
+    obj = ossl_x509_new(cert);
+    X509_free(cert);
+
+    return obj;
+}
+
+/*
+ * call-seq:
+ *    ssl.peer_cert_chain => [cert, ...] or nil
+ */
+static VALUE
+ossl_ssl_get_peer_cert_chain(VALUE self)
+{
+    SSL *ssl;
+    STACK_OF(X509) *chain;
+    X509 *cert;
+    VALUE ary;
+    int i, num;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if(!ssl){
+	rb_warning("SSL session is not started yet.");
+	return Qnil;
+    }
+    chain = SSL_get_peer_cert_chain(ssl);
+    if(!chain) return Qnil;
+    num = sk_num(chain);
+    ary = rb_ary_new2(num);
+    for (i = 0; i < num; i++){
+	cert = (X509*)sk_value(chain, i);
+	rb_ary_push(ary, ossl_x509_new(cert));
+    }
+
+    return ary;
+}
+
+/*
+ * call-seq:
+ *    ssl.cipher => [name, version, bits, alg_bits]
+ */
+static VALUE
+ossl_ssl_get_cipher(VALUE self)
+{
+    SSL *ssl;
+    SSL_CIPHER *cipher;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (!ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+    cipher = SSL_get_current_cipher(ssl);
+
+    return ossl_ssl_cipher_to_ary(cipher);
+}
+
+/*
+ * call-seq:
+ *    ssl.state => string
+ */
+static VALUE
+ossl_ssl_get_state(VALUE self)
+{
+    SSL *ssl;
+    VALUE ret;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (!ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+    ret = rb_str_new2(SSL_state_string(ssl));
+    if (ruby_verbose) {
+        rb_str_cat2(ret, ": ");
+        rb_str_cat2(ret, SSL_state_string_long(ssl));
+    }
+    return ret;
+}
+
+/*
+ * call-seq:
+ *    ssl.pending => integer
+ */
+static VALUE
+ossl_ssl_pending(VALUE self)
+{
+    SSL *ssl;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (!ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+
+    return INT2NUM(SSL_pending(ssl));
+}
+
+/*
+ *  call-seq:
+ *     ssl.session_reused? -> true | false
+ *
+ */
+static VALUE
+ossl_ssl_session_reused(VALUE self)
+{
+    SSL *ssl;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (!ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+
+    switch(SSL_session_reused(ssl)) {
+    case 1:	return Qtrue;
+    case 0:	return Qfalse;
+    default:	ossl_raise(eSSLError, "SSL_session_reused");
+    }
+}
+
+/*
+ *  call-seq:
+ *     ssl.session = session -> session
+ *
+ */
+static VALUE
+ossl_ssl_set_session(VALUE self, VALUE arg1)
+{
+    SSL *ssl;
+    SSL_SESSION *sess;
+
+/* why is ossl_ssl_setup delayed? */
+    ossl_ssl_setup(self);
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (!ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+
+    SafeGetSSLSession(arg1, sess);
+
+    if (SSL_set_session(ssl, sess) != 1)
+        ossl_raise(eSSLError, "SSL_set_session");
+
+    return arg1;
+}
+
+static VALUE
+ossl_ssl_get_verify_result(VALUE self)
+{
+    SSL *ssl;
+
+    Data_Get_Struct(self, SSL, ssl);
+    if (!ssl) {
+        rb_warning("SSL session is not started yet.");
+        return Qnil;
+    }
+
+    return INT2FIX(SSL_get_verify_result(ssl));
+}
+
+void
+Init_ossl_ssl()
+{
+    int i;
+    VALUE ary;
+
+#if 0 /* let rdoc know about mOSSL */
+    mOSSL = rb_define_module("OpenSSL");
+#endif
+
+    ID_callback_state = rb_intern("@callback_state");
+
+    ossl_ssl_ex_vcb_idx = SSL_get_ex_new_index(0,(void *)"ossl_ssl_ex_vcb_idx",0,0,0);
+    ossl_ssl_ex_store_p = SSL_get_ex_new_index(0,(void *)"ossl_ssl_ex_store_p",0,0,0);
+    ossl_ssl_ex_ptr_idx = SSL_get_ex_new_index(0,(void *)"ossl_ssl_ex_ptr_idx",0,0,0);
+    ossl_ssl_ex_client_cert_cb_idx =
+	SSL_get_ex_new_index(0,(void *)"ossl_ssl_ex_client_cert_cb_idx",0,0,0);
+    ossl_ssl_ex_tmp_dh_callback_idx =
+	SSL_get_ex_new_index(0,(void *)"ossl_ssl_ex_tmp_dh_callback_idx",0,0,0);
+
+    mSSL = rb_define_module_under(mOSSL, "SSL");
+    eSSLError = rb_define_class_under(mSSL, "SSLError", eOSSLError);
+
+    Init_ossl_ssl_session();
+
+    /* class SSLContext
+     *
+     * The following attributes are available but don't show up in rdoc.
+     * All attributes must be set before calling SSLSocket.new(io, ctx).
+     * * ssl_version, cert, key, client_ca, ca_file, ca_path, timeout,
+     * * verify_mode, verify_depth client_cert_cb, tmp_dh_callback,
+     * * session_id_context, session_add_cb, session_new_cb, session_remove_cb
+     */
+    cSSLContext = rb_define_class_under(mSSL, "SSLContext", rb_cObject);
+    rb_define_alloc_func(cSSLContext, ossl_sslctx_s_alloc);
+    for(i = 0; i < numberof(ossl_sslctx_attrs); i++)
+        rb_attr(cSSLContext, rb_intern(ossl_sslctx_attrs[i]), 1, 1, Qfalse);
+    rb_define_alias(cSSLContext, "ssl_timeout", "timeout");
+    rb_define_method(cSSLContext, "initialize",  ossl_sslctx_initialize, -1);
+    rb_define_method(cSSLContext, "ssl_version=", ossl_sslctx_set_ssl_version, 1);
+    rb_define_method(cSSLContext, "ciphers",     ossl_sslctx_get_ciphers, 0);
+    rb_define_method(cSSLContext, "ciphers=",    ossl_sslctx_set_ciphers, 1);
+
+    rb_define_method(cSSLContext, "setup", ossl_sslctx_setup, 0);
+
+    
+    rb_define_const(cSSLContext, "SESSION_CACHE_OFF", LONG2FIX(SSL_SESS_CACHE_OFF));
+    rb_define_const(cSSLContext, "SESSION_CACHE_CLIENT", LONG2FIX(SSL_SESS_CACHE_CLIENT)); /* doesn't actually do anything in 0.9.8e */
+    rb_define_const(cSSLContext, "SESSION_CACHE_SERVER", LONG2FIX(SSL_SESS_CACHE_SERVER));
+    rb_define_const(cSSLContext, "SESSION_CACHE_BOTH", LONG2FIX(SSL_SESS_CACHE_BOTH)); /* no different than CACHE_SERVER in 0.9.8e */
+    rb_define_const(cSSLContext, "SESSION_CACHE_NO_AUTO_CLEAR", LONG2FIX(SSL_SESS_CACHE_NO_AUTO_CLEAR));
+    rb_define_const(cSSLContext, "SESSION_CACHE_NO_INTERNAL_LOOKUP", LONG2FIX(SSL_SESS_CACHE_NO_INTERNAL_LOOKUP));
+    rb_define_const(cSSLContext, "SESSION_CACHE_NO_INTERNAL_STORE", LONG2FIX(SSL_SESS_CACHE_NO_INTERNAL_STORE));
+    rb_define_const(cSSLContext, "SESSION_CACHE_NO_INTERNAL", LONG2FIX(SSL_SESS_CACHE_NO_INTERNAL));
+    rb_define_method(cSSLContext, "session_add",     ossl_sslctx_session_add, 1);
+    rb_define_method(cSSLContext, "session_remove",     ossl_sslctx_session_remove, 1);
+    rb_define_method(cSSLContext, "session_cache_mode",     ossl_sslctx_get_session_cache_mode, 0);
+    rb_define_method(cSSLContext, "session_cache_mode=",     ossl_sslctx_set_session_cache_mode, 1);
+    rb_define_method(cSSLContext, "session_cache_size",     ossl_sslctx_get_session_cache_size, 0);
+    rb_define_method(cSSLContext, "session_cache_size=",     ossl_sslctx_set_session_cache_size, 1);
+    rb_define_method(cSSLContext, "session_cache_stats",     ossl_sslctx_get_session_cache_stats, 0);
+    rb_define_method(cSSLContext, "flush_sessions",     ossl_sslctx_flush_sessions, -1);
+
+    ary = rb_ary_new2(numberof(ossl_ssl_method_tab));
+    for (i = 0; i < numberof(ossl_ssl_method_tab); i++) {
+        rb_ary_push(ary, ID2SYM(rb_intern(ossl_ssl_method_tab[i].name)));
+    }
+    rb_obj_freeze(ary);
+    /* holds a list of available SSL/TLS methods */
+    rb_define_const(cSSLContext, "METHODS", ary);
+
+    /* class SSLSocket
+     *
+     * The following attributes are available but don't show up in rdoc.
+     * * io, context, sync_close
+     *
+     */
+    cSSLSocket = rb_define_class_under(mSSL, "SSLSocket", rb_cObject);
+    rb_define_alloc_func(cSSLSocket, ossl_ssl_s_alloc);
+    for(i = 0; i < numberof(ossl_ssl_attr_readers); i++)
+        rb_attr(cSSLSocket, rb_intern(ossl_ssl_attr_readers[i]), 1, 0, Qfalse);
+    for(i = 0; i < numberof(ossl_ssl_attrs); i++)
+        rb_attr(cSSLSocket, rb_intern(ossl_ssl_attrs[i]), 1, 1, Qfalse);
+    rb_define_alias(cSSLSocket, "to_io", "io");
+    rb_define_method(cSSLSocket, "initialize", ossl_ssl_initialize, -1);
+    rb_define_method(cSSLSocket, "connect",    ossl_ssl_connect, 0);
+    rb_define_method(cSSLSocket, "accept",     ossl_ssl_accept, 0);
+    rb_define_method(cSSLSocket, "sysread",    ossl_ssl_read, -1);
+    rb_define_method(cSSLSocket, "syswrite",   ossl_ssl_write, 1);
+    rb_define_method(cSSLSocket, "sysclose",   ossl_ssl_close, 0);
+    rb_define_method(cSSLSocket, "cert",       ossl_ssl_get_cert, 0);
+    rb_define_method(cSSLSocket, "peer_cert",  ossl_ssl_get_peer_cert, 0);
+    rb_define_method(cSSLSocket, "peer_cert_chain", ossl_ssl_get_peer_cert_chain, 0);
+    rb_define_method(cSSLSocket, "cipher",     ossl_ssl_get_cipher, 0);
+    rb_define_method(cSSLSocket, "state",      ossl_ssl_get_state, 0);
+    rb_define_method(cSSLSocket, "pending",    ossl_ssl_pending, 0);
+    rb_define_method(cSSLSocket, "session_reused?",    ossl_ssl_session_reused, 0);
+    rb_define_method(cSSLSocket, "session=",    ossl_ssl_set_session, 1);
+    rb_define_method(cSSLSocket, "verify_result", ossl_ssl_get_verify_result, 0);
+
+#define ossl_ssl_def_const(x) rb_define_const(mSSL, #x, INT2FIX(SSL_##x))
+
+    ossl_ssl_def_const(VERIFY_NONE);
+    ossl_ssl_def_const(VERIFY_PEER);
+    ossl_ssl_def_const(VERIFY_FAIL_IF_NO_PEER_CERT);
+    ossl_ssl_def_const(VERIFY_CLIENT_ONCE);
+    /* Not introduce constants included in OP_ALL such as...
+     * ossl_ssl_def_const(OP_MICROSOFT_SESS_ID_BUG);
+     * ossl_ssl_def_const(OP_NETSCAPE_CHALLENGE_BUG);
+     * ossl_ssl_def_const(OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG);
+     * ossl_ssl_def_const(OP_SSLREF2_REUSE_CERT_TYPE_BUG);
+     * ossl_ssl_def_const(OP_MICROSOFT_BIG_SSLV3_BUFFER);
+     * ossl_ssl_def_const(OP_MSIE_SSLV2_RSA_PADDING);
+     * ossl_ssl_def_const(OP_SSLEAY_080_CLIENT_DH_BUG);
+     * ossl_ssl_def_const(OP_TLS_D5_BUG);
+     * ossl_ssl_def_const(OP_TLS_BLOCK_PADDING_BUG);
+     * ossl_ssl_def_const(OP_DONT_INSERT_EMPTY_FRAGMENTS);
+     */
+    ossl_ssl_def_const(OP_ALL);
+#if defined(SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION)
+    ossl_ssl_def_const(OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION);
+#endif
+#if defined(SSL_OP_SINGLE_ECDH_USE)
+    ossl_ssl_def_const(OP_SINGLE_ECDH_USE);
+#endif
+    ossl_ssl_def_const(OP_SINGLE_DH_USE);
+    ossl_ssl_def_const(OP_EPHEMERAL_RSA);
+#if defined(SSL_OP_CIPHER_SERVER_PREFERENCE)
+    ossl_ssl_def_const(OP_CIPHER_SERVER_PREFERENCE);
+#endif
+    ossl_ssl_def_const(OP_TLS_ROLLBACK_BUG);
+    ossl_ssl_def_const(OP_NO_SSLv2);
+    ossl_ssl_def_const(OP_NO_SSLv3);
+    ossl_ssl_def_const(OP_NO_TLSv1);
+#if defined(SSL_OP_NO_TICKET)
+    ossl_ssl_def_const(OP_NO_TICKET);
+#endif
+    ossl_ssl_def_const(OP_PKCS1_CHECK_1);
+    ossl_ssl_def_const(OP_PKCS1_CHECK_2);
+    ossl_ssl_def_const(OP_NETSCAPE_CA_DN_BUG);
+    ossl_ssl_def_const(OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG);
+}