/* ssl/bio_ssl.c */

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@cryptsoft.com).

 * The implementation was written so as to conform with Netscapes SSL.

 * 

 * This library is free for commercial and non-commercial use as long as

 * the following conditions are aheared to.  The following conditions

 * apply to all code found in this distribution, be it the RC4, RSA,

 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

 * included with this distribution is covered by the same copyright terms

 * except that the holder is Tim Hudson (tjh@cryptsoft.com).

 * 

 * Copyright remains Eric Young's, and as such any Copyright notices in

 * the code are not to be removed.

 * If this package is used in a product, Eric Young should be given attribution

 * as the author of the parts of the library used.

 * This can be in the form of a textual message at program startup or

 * in documentation (online or textual) provided with the package.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *    "This product includes cryptographic software written by

 *     Eric Young (eay@cryptsoft.com)"

 *    The word 'cryptographic' can be left out if the rouines from the library

 *    being used are not cryptographic related :-).

 * 4. If you include any Windows specific code (or a derivative thereof) from 

 *    the apps directory (application code) you must include an acknowledgement:

 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

 * 

 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 * 

 * The licence and distribution terms for any publically available version or

 * derivative of this code cannot be changed.  i.e. this code cannot simply be

 * copied and put under another distribution licence

 * [including the GNU Public Licence.]

 */

/*

 © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <openssl/crypto.h>

#include <openssl/bio.h>

#include <openssl/err.h>

#include <openssl/ssl.h>

#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

#include "libssl_wsd.h"

#endif

static int ssl_write(BIO *h, const char *buf, int num);

static int ssl_read(BIO *h, char *buf, int size);

static int ssl_puts(BIO *h, const char *str);

static long ssl_ctrl(BIO *h, int cmd, long arg1, void *arg2);

static int ssl_new(BIO *h);

static int ssl_free(BIO *data);

static long ssl_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);

typedef struct bio_ssl_st

	{

	SSL *ssl; /* The ssl handle :-) */

	/* re-negotiate every time the total number of bytes is this size */

	int num_renegotiates;

	unsigned long renegotiate_count;

	unsigned long byte_count;

	unsigned long renegotiate_timeout;

	unsigned long last_time;

	} BIO_SSL;

#ifdef __cplusplus

extern "C"

{

#endif

#ifndef EMULATOR

	static BIO_METHOD methods_sslp=

#else

	const BIO_METHOD temp_methods_sslp=

#endif

	{

	BIO_TYPE_SSL,"ssl",

	ssl_write,

	ssl_read,

	ssl_puts,

	NULL, /* ssl_gets, */

	ssl_ctrl,

	ssl_new,

	ssl_free,

	ssl_callback_ctrl,

	};

#ifdef __cplusplus

}

#endif

#ifdef EMULATOR

GET_STATIC_VAR_FROM_TLS(methods_sslp,bio_ssl,BIO_METHOD)

#define methods_sslp (*GET_WSD_VAR_NAME(methods_sslp,bio_ssl,s)())

#endif //EMULATOR

EXPORT_C BIO_METHOD *BIO_f_ssl(void)

	{

	return(&methods_sslp);

	}

static int ssl_new(BIO *bi)

	{

	BIO_SSL *bs;

	bs=(BIO_SSL *)OPENSSL_malloc(sizeof(BIO_SSL));

	if (bs == NULL)

		{

		BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);

		return(0);

		}

	memset(bs,0,sizeof(BIO_SSL));

	bi->init=0;

	bi->ptr=(char *)bs;

	bi->flags=0;

	return(1);

	}

static int ssl_free(BIO *a)

	{

	BIO_SSL *bs;

	if (a == NULL) return(0);

	bs=(BIO_SSL *)a->ptr;

	if (bs->ssl != NULL) SSL_shutdown(bs->ssl);

	if (a->shutdown)

		{

		if (a->init && (bs->ssl != NULL))

			SSL_free(bs->ssl);

		a->init=0;

		a->flags=0;

		}

	if (a->ptr != NULL)

		OPENSSL_free(a->ptr);

	return(1);

	}

static int ssl_read(BIO *b, char *out, int outl)

	{

	int ret=1;

	BIO_SSL *sb;

	SSL *ssl;

	int retry_reason=0;

	int r=0;

	if (out == NULL) return(0);

	sb=(BIO_SSL *)b->ptr;

	ssl=sb->ssl;

	BIO_clear_retry_flags(b);

#if 0

	if (!SSL_is_init_finished(ssl))

		{

/*		ret=SSL_do_handshake(ssl); */

		if (ret > 0)

			{

			outflags=(BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);

			ret= -1;

			goto end;

			}

		}

#endif

/*	if (ret > 0) */

	ret=SSL_read(ssl,out,outl);

	switch (SSL_get_error(ssl,ret))

		{

	case SSL_ERROR_NONE:

		if (ret <= 0) break;

		if (sb->renegotiate_count > 0)

			{

			sb->byte_count+=ret;

			if (sb->byte_count > sb->renegotiate_count)

				{

				sb->byte_count=0;

				sb->num_renegotiates++;

				SSL_renegotiate(ssl);

				r=1;

				}

			}

		if ((sb->renegotiate_timeout > 0) && (!r))

			{

			unsigned long tm;

			tm=(unsigned long)time(NULL);

			if (tm > sb->last_time+sb->renegotiate_timeout)

				{

				sb->last_time=tm;

				sb->num_renegotiates++;

				SSL_renegotiate(ssl);

				}

			}

		break;

	case SSL_ERROR_WANT_READ:

		BIO_set_retry_read(b);

		break;

	case SSL_ERROR_WANT_WRITE:

		BIO_set_retry_write(b);

		break;

	case SSL_ERROR_WANT_X509_LOOKUP:

		BIO_set_retry_special(b);

		retry_reason=BIO_RR_SSL_X509_LOOKUP;

		break;

	case SSL_ERROR_WANT_ACCEPT:

		BIO_set_retry_special(b);

		retry_reason=BIO_RR_ACCEPT;

		break;

	case SSL_ERROR_WANT_CONNECT:

		BIO_set_retry_special(b);

		retry_reason=BIO_RR_CONNECT;

		break;

	case SSL_ERROR_SYSCALL:

	case SSL_ERROR_SSL:

	case SSL_ERROR_ZERO_RETURN:

	default:

		break;

		}

	b->retry_reason=retry_reason;

	return(ret);

	}

static int ssl_write(BIO *b, const char *out, int outl)

	{

	int ret,r=0;

	int retry_reason=0;

	SSL *ssl;

	BIO_SSL *bs;

	if (out == NULL) return(0);

	bs=(BIO_SSL *)b->ptr;

	ssl=bs->ssl;

	BIO_clear_retry_flags(b);

/*	ret=SSL_do_handshake(ssl);

	if (ret > 0) */

	ret=SSL_write(ssl,out,outl);

	switch (SSL_get_error(ssl,ret))

		{

	case SSL_ERROR_NONE:

		if (ret <= 0) break;

		if (bs->renegotiate_count > 0)

			{

			bs->byte_count+=ret;

			if (bs->byte_count > bs->renegotiate_count)

				{

				bs->byte_count=0;

				bs->num_renegotiates++;

				SSL_renegotiate(ssl);

				r=1;

				}

			}

		if ((bs->renegotiate_timeout > 0) && (!r))

			{

			unsigned long tm;

			tm=(unsigned long)time(NULL);

			if (tm > bs->last_time+bs->renegotiate_timeout)

				{

				bs->last_time=tm;

				bs->num_renegotiates++;

				SSL_renegotiate(ssl);

				}

			}

		break;

	case SSL_ERROR_WANT_WRITE:

		BIO_set_retry_write(b);

		break;

	case SSL_ERROR_WANT_READ:

		BIO_set_retry_read(b);

		break;

	case SSL_ERROR_WANT_X509_LOOKUP:

		BIO_set_retry_special(b);

		retry_reason=BIO_RR_SSL_X509_LOOKUP;

		break;

	case SSL_ERROR_WANT_CONNECT:

		BIO_set_retry_special(b);

		retry_reason=BIO_RR_CONNECT;

	case SSL_ERROR_SYSCALL:

	case SSL_ERROR_SSL:

	default:

		break;

		}

	b->retry_reason=retry_reason;

	return(ret);

	}

static long ssl_ctrl(BIO *b, int cmd, long num, void *ptr)

	{

	SSL **sslp,*ssl;

	BIO_SSL *bs;

	BIO *dbio,*bio;

	long ret=1;

	bs=(BIO_SSL *)b->ptr;

	ssl=bs->ssl;

	if ((ssl == NULL)  && (cmd != BIO_C_SET_SSL))

		return(0);

	switch (cmd)

		{

	case BIO_CTRL_RESET:

		SSL_shutdown(ssl);

		if (ssl->handshake_func == ssl->method->ssl_connect)

			SSL_set_connect_state(ssl);

		else if (ssl->handshake_func == ssl->method->ssl_accept)

			SSL_set_accept_state(ssl);

		SSL_clear(ssl);

		if (b->next_bio != NULL)

			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);

		else if (ssl->rbio != NULL)

			ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);

		else

			ret=1;

		break;

	case BIO_CTRL_INFO:

		ret=0;

		break;

	case BIO_C_SSL_MODE:

		if (num) /* client mode */

			SSL_set_connect_state(ssl);

		else

			SSL_set_accept_state(ssl);

		break;

	case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:

		ret=bs->renegotiate_timeout;

		if (num < 60) num=5;

		bs->renegotiate_timeout=(unsigned long)num;

		bs->last_time=(unsigned long)time(NULL);

		break;

	case BIO_C_SET_SSL_RENEGOTIATE_BYTES:

		ret=bs->renegotiate_count;

		if ((long)num >=512)

			bs->renegotiate_count=(unsigned long)num;

		break;

	case BIO_C_GET_SSL_NUM_RENEGOTIATES:

		ret=bs->num_renegotiates;

		break;

	case BIO_C_SET_SSL:

		if (ssl != NULL)

			ssl_free(b);

		b->shutdown=(int)num;

		ssl=(SSL *)ptr;

		((BIO_SSL *)b->ptr)->ssl=ssl;

		bio=SSL_get_rbio(ssl);

		if (bio != NULL)

			{

			if (b->next_bio != NULL)

				BIO_push(bio,b->next_bio);

			b->next_bio=bio;

			CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);

			}

		b->init=1;

		break;

	case BIO_C_GET_SSL:

		if (ptr != NULL)

			{

			sslp=(SSL **)ptr;

			*sslp=ssl;

			}

		else

			ret=0;

		break;

	case BIO_CTRL_GET_CLOSE:

		ret=b->shutdown;

		break;

	case BIO_CTRL_SET_CLOSE:

		b->shutdown=(int)num;

		break;

	case BIO_CTRL_WPENDING:

		ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);

		break;

	case BIO_CTRL_PENDING:

		ret=SSL_pending(ssl);

		if (ret == 0)

			ret=BIO_pending(ssl->rbio);

		break;

	case BIO_CTRL_FLUSH:

		BIO_clear_retry_flags(b);

		ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);

		BIO_copy_next_retry(b);

		break;

	case BIO_CTRL_PUSH:

		if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))

			{

			SSL_set_bio(ssl,b->next_bio,b->next_bio);

			CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);

			}

		break;

	case BIO_CTRL_POP:

		/* ugly bit of a hack */

		if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */

			{

			BIO_free_all(ssl->wbio);

			}

		if (b->next_bio != NULL)

			{

			CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);

			}

		ssl->wbio=NULL;

		ssl->rbio=NULL;

		break;

	case BIO_C_DO_STATE_MACHINE:

		BIO_clear_retry_flags(b);

		b->retry_reason=0;

		ret=(int)SSL_do_handshake(ssl);

		switch (SSL_get_error(ssl,(int)ret))

			{

		case SSL_ERROR_WANT_READ:

			BIO_set_flags(b,

				BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY);

			break;

		case SSL_ERROR_WANT_WRITE:

			BIO_set_flags(b,

				BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY);

			break;

		case SSL_ERROR_WANT_CONNECT:

			BIO_set_flags(b,

				BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY);

			b->retry_reason=b->next_bio->retry_reason;

			break;

		default:

			break;

			}

		break;

	case BIO_CTRL_DUP:

		dbio=(BIO *)ptr;

		if (((BIO_SSL *)dbio->ptr)->ssl != NULL)

			SSL_free(((BIO_SSL *)dbio->ptr)->ssl);

		((BIO_SSL *)dbio->ptr)->ssl=SSL_dup(ssl);

		((BIO_SSL *)dbio->ptr)->renegotiate_count=

			((BIO_SSL *)b->ptr)->renegotiate_count;

		((BIO_SSL *)dbio->ptr)->byte_count=

			((BIO_SSL *)b->ptr)->byte_count;

		((BIO_SSL *)dbio->ptr)->renegotiate_timeout=

			((BIO_SSL *)b->ptr)->renegotiate_timeout;

		((BIO_SSL *)dbio->ptr)->last_time=

			((BIO_SSL *)b->ptr)->last_time;

		ret=(((BIO_SSL *)dbio->ptr)->ssl != NULL);

		break;

	case BIO_C_GET_FD:

		ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);

		break;

	case BIO_CTRL_SET_CALLBACK:

		{

#if 0 /* FIXME: Should this be used?  -- Richard Levitte */

		SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

		ret = -1;

#else

		ret=0;

#endif

		}

		break;

	case BIO_CTRL_GET_CALLBACK:

		{

		void (**fptr)(const SSL *xssl,int type,int val);

		fptr=(void (**)(const SSL *xssl,int type,int val))ptr;

		*fptr=SSL_get_info_callback(ssl);

		}

		break;

	default:

		ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);

		break;

		}

	return(ret);

	}

static long ssl_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)

	{

	SSL *ssl;

	BIO_SSL *bs;

	long ret=1;

	bs=(BIO_SSL *)b->ptr;

	ssl=bs->ssl;

	switch (cmd)

		{

	case BIO_CTRL_SET_CALLBACK:

		{

		/* FIXME: setting this via a completely different prototype

		   seems like a crap idea */

		SSL_set_info_callback(ssl,(void (*)(const SSL *,int,int))fp);

		}

		break;

	default:

		ret=BIO_callback_ctrl(ssl->rbio,cmd,fp);

		break;

		}

	return(ret);

	}

static int ssl_puts(BIO *bp, const char *str)

	{

	int n,ret;

	n=strlen(str);

	ret=BIO_write(bp,str,n);

	return(ret);

	}

EXPORT_C BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx)

	{

#ifndef OPENSSL_NO_SOCK

	BIO *ret=NULL,*buf=NULL,*ssl=NULL;

	if ((buf=BIO_new(BIO_f_buffer())) == NULL)

		return(NULL);

	if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)

		goto err;

	if ((ret=BIO_push(buf,ssl)) == NULL)

		goto err;

	return(ret);

err:

	if (buf != NULL) BIO_free(buf);

	if (ssl != NULL) BIO_free(ssl);

#endif

	return(NULL);

	}

EXPORT_C BIO *BIO_new_ssl_connect(SSL_CTX *ctx)

	{

	BIO *ret=NULL,*con=NULL,*ssl=NULL;

	if ((con=BIO_new(BIO_s_connect())) == NULL)

		return(NULL);

	if ((ssl=BIO_new_ssl(ctx,1)) == NULL)

		goto err;

	if ((ret=BIO_push(ssl,con)) == NULL)

		goto err;

	return(ret);

err:

	if (con != NULL) BIO_free(con);

	if (ret != NULL) BIO_free(ret);

	return(NULL);

	}

EXPORT_C BIO *BIO_new_ssl(SSL_CTX *ctx, int client)

	{

	BIO *ret;

	SSL *ssl;

	if ((ret=BIO_new(BIO_f_ssl())) == NULL)

		return(NULL);

	if ((ssl=SSL_new(ctx)) == NULL)

		{

		BIO_free(ret);

		return(NULL);

		}

	if (client)

		SSL_set_connect_state(ssl);

	else

		SSL_set_accept_state(ssl);

	BIO_set_ssl(ret,ssl,BIO_CLOSE);

	return(ret);

	}

EXPORT_C int BIO_ssl_copy_session_id(BIO *t, BIO *f)

	{

	t=BIO_find_type(t,BIO_TYPE_SSL);

	f=BIO_find_type(f,BIO_TYPE_SSL);

	if ((t == NULL) || (f == NULL))

		return(0);

	if (	(((BIO_SSL *)t->ptr)->ssl == NULL) || 

		(((BIO_SSL *)f->ptr)->ssl == NULL))

		return(0);

	SSL_copy_session_id(((BIO_SSL *)t->ptr)->ssl,((BIO_SSL *)f->ptr)->ssl);

	return(1);

	}

EXPORT_C void BIO_ssl_shutdown(BIO *b)

	{

	SSL *s;

	while (b != NULL)

		{

		if (b->method->type == BIO_TYPE_SSL)

			{

			s=((BIO_SSL *)b->ptr)->ssl;

			SSL_shutdown(s);

			break;

			}

		b=b->next_bio;

		}

	}