/* 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;

 		}

 	}