[thirdparty/openssl.git] / ssl / bio_ssl.c

/* 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.]
 */

#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>

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;

static BIO_METHOD methods_sslp=
	{
	BIO_TYPE_SSL,"ssl",
	ssl_write,
	ssl_read,
	ssl_puts,
	NULL, /* ssl_gets, */
	ssl_ctrl,
	ssl_new,
	ssl_free,
	ssl_callback_ctrl,
	};

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);
			if (!ssl_new(b))
				return 0;
			}
		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);
	}

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);
	}

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);
	}

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);
	}

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);
	}

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;
		}
	}
Commit	Line	Data
d02b48c6	1	/* ssl/bio_ssl.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
	8	*
	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	15	*
	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
	22	*
	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
	37	* 4. If you include any Windows specific code (or a derivative thereof) from
	38	* the apps directory (application code) you must include an acknowledgement:
	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
	58
	59	#include <stdio.h>
58964a49	60	#include <stdlib.h>
d02b48c6 RE	61	#include <string.h>
d02b48c6 RE	62	#include <errno.h>
ec577822 BM	63	#include <openssl/crypto.h>
	64	#include <openssl/bio.h>
	65	#include <openssl/err.h>
	66	#include <openssl/ssl.h>
d02b48c6	67
0e1c0612 UM	68	static int ssl_write(BIO h, const char buf, int num);
	69	static int ssl_read(BIO h, char buf, int size);
	70	static int ssl_puts(BIO h, const char str);
	71	static long ssl_ctrl(BIO h, int cmd, long arg1, void arg2);
d02b48c6 RE	72	static int ssl_new(BIO *h);
d02b48c6 RE	73	static int ssl_free(BIO *data);
13083215	74	static long ssl_callback_ctrl(BIO h, int cmd, bio_info_cb fp);
58964a49 RE	75	typedef struct bio_ssl_st
	76	{
	77	SSL ssl; / The ssl handle :-) */
	78	/* re-negotiate every time the total number of bytes is this size */
	79	int num_renegotiates;
	80	unsigned long renegotiate_count;
	81	unsigned long byte_count;
	82	unsigned long renegotiate_timeout;
	83	unsigned long last_time;
	84	} BIO_SSL;
	85
d02b48c6 RE	86	static BIO_METHOD methods_sslp=
	87	{
	88	BIO_TYPE_SSL,"ssl",
	89	ssl_write,
	90	ssl_read,
	91	ssl_puts,
	92	NULL, /* ssl_gets, */
	93	ssl_ctrl,
	94	ssl_new,
	95	ssl_free,
d3442bc7	96	ssl_callback_ctrl,
a9188d4e RL	97	};
a9188d4e RL	98
6b691a5c	99	BIO_METHOD *BIO_f_ssl(void)
d02b48c6 RE	100	{
	101	return(&methods_sslp);
	102	}
	103
6b691a5c	104	static int ssl_new(BIO *bi)
d02b48c6	105	{
58964a49 RE	106	BIO_SSL *bs;
58964a49 RE	107
26a3a48d	108	bs=(BIO_SSL *)OPENSSL_malloc(sizeof(BIO_SSL));
58964a49 RE	109	if (bs == NULL)
	110	{
	111	BIOerr(BIO_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
	112	return(0);
	113	}
	114	memset(bs,0,sizeof(BIO_SSL));
d02b48c6	115	bi->init=0;
58964a49	116	bi->ptr=(char *)bs;
d02b48c6 RE	117	bi->flags=0;
	118	return(1);
	119	}
	120
6b691a5c	121	static int ssl_free(BIO *a)
d02b48c6	122	{
58964a49 RE	123	BIO_SSL *bs;
58964a49 RE	124
d02b48c6	125	if (a == NULL) return(0);
58964a49 RE	126	bs=(BIO_SSL *)a->ptr;
58964a49 RE	127	if (bs->ssl != NULL) SSL_shutdown(bs->ssl);
d02b48c6 RE	128	if (a->shutdown)
d02b48c6 RE	129	{
58964a49 RE	130	if (a->init && (bs->ssl != NULL))
58964a49 RE	131	SSL_free(bs->ssl);
d02b48c6 RE	132	a->init=0;
d02b48c6 RE	133	a->flags=0;
d02b48c6	134	}
58964a49	135	if (a->ptr != NULL)
26a3a48d	136	OPENSSL_free(a->ptr);
d02b48c6 RE	137	return(1);
	138	}
	139
6b691a5c	140	static int ssl_read(BIO b, char out, int outl)
d02b48c6 RE	141	{
d02b48c6 RE	142	int ret=1;
58964a49	143	BIO_SSL *sb;
d02b48c6 RE	144	SSL *ssl;
d02b48c6 RE	145	int retry_reason=0;
58964a49	146	int r=0;
d02b48c6 RE	147
d02b48c6 RE	148	if (out == NULL) return(0);
58964a49 RE	149	sb=(BIO_SSL *)b->ptr;
58964a49 RE	150	ssl=sb->ssl;
d02b48c6	151
58964a49	152	BIO_clear_retry_flags(b);
d02b48c6	153
58964a49	154	#if 0
d02b48c6 RE	155	if (!SSL_is_init_finished(ssl))
d02b48c6 RE	156	{
58964a49	157	/* ret=SSL_do_handshake(ssl); */
d02b48c6 RE	158	if (ret > 0)
d02b48c6 RE	159	{
58964a49	160
d02b48c6 RE	161	outflags=(BIO_FLAGS_READ\|BIO_FLAGS_SHOULD_RETRY);
	162	ret= -1;
	163	goto end;
	164	}
d02b48c6	165	}
58964a49 RE	166	#endif
	167	/* if (ret > 0) */
	168	ret=SSL_read(ssl,out,outl);
d02b48c6 RE	169
	170	switch (SSL_get_error(ssl,ret))
	171	{
	172	case SSL_ERROR_NONE:
	173	if (ret <= 0) break;
58964a49 RE	174	if (sb->renegotiate_count > 0)
	175	{
	176	sb->byte_count+=ret;
	177	if (sb->byte_count > sb->renegotiate_count)
	178	{
	179	sb->byte_count=0;
	180	sb->num_renegotiates++;
	181	SSL_renegotiate(ssl);
	182	r=1;
	183	}
	184	}
	185	if ((sb->renegotiate_timeout > 0) && (!r))
	186	{
	187	unsigned long tm;
	188
	189	tm=(unsigned long)time(NULL);
	190	if (tm > sb->last_time+sb->renegotiate_timeout)
	191	{
	192	sb->last_time=tm;
	193	sb->num_renegotiates++;
	194	SSL_renegotiate(ssl);
	195	}
	196	}
	197
d02b48c6 RE	198	break;
d02b48c6 RE	199	case SSL_ERROR_WANT_READ:
58964a49	200	BIO_set_retry_read(b);
d02b48c6 RE	201	break;
d02b48c6 RE	202	case SSL_ERROR_WANT_WRITE:
58964a49	203	BIO_set_retry_write(b);
d02b48c6 RE	204	break;
d02b48c6 RE	205	case SSL_ERROR_WANT_X509_LOOKUP:
58964a49	206	BIO_set_retry_special(b);
d02b48c6 RE	207	retry_reason=BIO_RR_SSL_X509_LOOKUP;
d02b48c6 RE	208	break;
924046ce DSH	209	case SSL_ERROR_WANT_ACCEPT:
	210	BIO_set_retry_special(b);
	211	retry_reason=BIO_RR_ACCEPT;
	212	break;
d02b48c6	213	case SSL_ERROR_WANT_CONNECT:
58964a49	214	BIO_set_retry_special(b);
d02b48c6 RE	215	retry_reason=BIO_RR_CONNECT;
	216	break;
	217	case SSL_ERROR_SYSCALL:
	218	case SSL_ERROR_SSL:
	219	case SSL_ERROR_ZERO_RETURN:
	220	default:
	221	break;
	222	}
	223
	224	b->retry_reason=retry_reason;
d02b48c6 RE	225	return(ret);
	226	}
	227
0e1c0612	228	static int ssl_write(BIO b, const char out, int outl)
d02b48c6	229	{
58964a49 RE	230	int ret,r=0;
58964a49 RE	231	int retry_reason=0;
d02b48c6	232	SSL *ssl;
58964a49	233	BIO_SSL *bs;
d02b48c6 RE	234
d02b48c6 RE	235	if (out == NULL) return(0);
58964a49 RE	236	bs=(BIO_SSL *)b->ptr;
58964a49 RE	237	ssl=bs->ssl;
d02b48c6	238
58964a49	239	BIO_clear_retry_flags(b);
d02b48c6	240
58964a49 RE	241	/* ret=SSL_do_handshake(ssl);
	242	if (ret > 0) */
	243	ret=SSL_write(ssl,out,outl);
d02b48c6 RE	244
	245	switch (SSL_get_error(ssl,ret))
	246	{
	247	case SSL_ERROR_NONE:
	248	if (ret <= 0) break;
58964a49 RE	249	if (bs->renegotiate_count > 0)
	250	{
	251	bs->byte_count+=ret;
	252	if (bs->byte_count > bs->renegotiate_count)
	253	{
	254	bs->byte_count=0;
	255	bs->num_renegotiates++;
	256	SSL_renegotiate(ssl);
	257	r=1;
	258	}
	259	}
	260	if ((bs->renegotiate_timeout > 0) && (!r))
	261	{
	262	unsigned long tm;
	263
	264	tm=(unsigned long)time(NULL);
	265	if (tm > bs->last_time+bs->renegotiate_timeout)
	266	{
	267	bs->last_time=tm;
	268	bs->num_renegotiates++;
	269	SSL_renegotiate(ssl);
	270	}
	271	}
d02b48c6 RE	272	break;
d02b48c6 RE	273	case SSL_ERROR_WANT_WRITE:
58964a49	274	BIO_set_retry_write(b);
d02b48c6 RE	275	break;
d02b48c6 RE	276	case SSL_ERROR_WANT_READ:
58964a49	277	BIO_set_retry_read(b);
d02b48c6 RE	278	break;
d02b48c6 RE	279	case SSL_ERROR_WANT_X509_LOOKUP:
58964a49	280	BIO_set_retry_special(b);
d02b48c6 RE	281	retry_reason=BIO_RR_SSL_X509_LOOKUP;
	282	break;
	283	case SSL_ERROR_WANT_CONNECT:
58964a49	284	BIO_set_retry_special(b);
d02b48c6 RE	285	retry_reason=BIO_RR_CONNECT;
	286	case SSL_ERROR_SYSCALL:
	287	case SSL_ERROR_SSL:
	288	default:
	289	break;
	290	}
	291
	292	b->retry_reason=retry_reason;
d02b48c6 RE	293	return(ret);
	294	}
	295
0e1c0612	296	static long ssl_ctrl(BIO b, int cmd, long num, void ptr)
d02b48c6 RE	297	{
d02b48c6 RE	298	SSL *sslp,ssl;
58964a49	299	BIO_SSL *bs;
d02b48c6 RE	300	BIO dbio,bio;
	301	long ret=1;
	302
58964a49 RE	303	bs=(BIO_SSL *)b->ptr;
	304	ssl=bs->ssl;
	305	if ((ssl == NULL) && (cmd != BIO_C_SET_SSL))
	306	return(0);
d02b48c6 RE	307	switch (cmd)
	308	{
	309	case BIO_CTRL_RESET:
	310	SSL_shutdown(ssl);
	311
	312	if (ssl->handshake_func == ssl->method->ssl_connect)
	313	SSL_set_connect_state(ssl);
	314	else if (ssl->handshake_func == ssl->method->ssl_accept)
	315	SSL_set_accept_state(ssl);
	316
	317	SSL_clear(ssl);
	318
	319	if (b->next_bio != NULL)
	320	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	321	else if (ssl->rbio != NULL)
	322	ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
	323	else
	324	ret=1;
	325	break;
d02b48c6 RE	326	case BIO_CTRL_INFO:
	327	ret=0;
	328	break;
	329	case BIO_C_SSL_MODE:
	330	if (num) /* client mode */
	331	SSL_set_connect_state(ssl);
	332	else
	333	SSL_set_accept_state(ssl);
	334	break;
58964a49 RE	335	case BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT:
	336	ret=bs->renegotiate_timeout;
	337	if (num < 60) num=5;
	338	bs->renegotiate_timeout=(unsigned long)num;
	339	bs->last_time=(unsigned long)time(NULL);
	340	break;
	341	case BIO_C_SET_SSL_RENEGOTIATE_BYTES:
	342	ret=bs->renegotiate_count;
	343	if ((long)num >=512)
	344	bs->renegotiate_count=(unsigned long)num;
	345	break;
	346	case BIO_C_GET_SSL_NUM_RENEGOTIATES:
	347	ret=bs->num_renegotiates;
	348	break;
d02b48c6	349	case BIO_C_SET_SSL:
58964a49	350	if (ssl != NULL)
c4b2eb24	351	{
58964a49	352	ssl_free(b);
c4b2eb24 DSH	353	if (!ssl_new(b))
	354	return 0;
	355	}
d02b48c6	356	b->shutdown=(int)num;
d02b48c6	357	ssl=(SSL *)ptr;
58964a49	358	((BIO_SSL *)b->ptr)->ssl=ssl;
d02b48c6 RE	359	bio=SSL_get_rbio(ssl);
	360	if (bio != NULL)
	361	{
	362	if (b->next_bio != NULL)
	363	BIO_push(bio,b->next_bio);
	364	b->next_bio=bio;
58964a49	365	CRYPTO_add(&bio->references,1,CRYPTO_LOCK_BIO);
d02b48c6 RE	366	}
	367	b->init=1;
	368	break;
	369	case BIO_C_GET_SSL:
	370	if (ptr != NULL)
	371	{
	372	sslp=(SSL **)ptr;
	373	*sslp=ssl;
	374	}
58964a49 RE	375	else
58964a49 RE	376	ret=0;
d02b48c6 RE	377	break;
	378	case BIO_CTRL_GET_CLOSE:
	379	ret=b->shutdown;
	380	break;
	381	case BIO_CTRL_SET_CLOSE:
	382	b->shutdown=(int)num;
	383	break;
	384	case BIO_CTRL_WPENDING:
	385	ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
	386	break;
	387	case BIO_CTRL_PENDING:
	388	ret=SSL_pending(ssl);
	389	if (ret == 0)
	390	ret=BIO_pending(ssl->rbio);
	391	break;
	392	case BIO_CTRL_FLUSH:
	393	BIO_clear_retry_flags(b);
	394	ret=BIO_ctrl(ssl->wbio,cmd,num,ptr);
	395	BIO_copy_next_retry(b);
	396	break;
	397	case BIO_CTRL_PUSH:
58964a49	398	if ((b->next_bio != NULL) && (b->next_bio != ssl->rbio))
d02b48c6 RE	399	{
d02b48c6 RE	400	SSL_set_bio(ssl,b->next_bio,b->next_bio);
58964a49	401	CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
d02b48c6 RE	402	}
	403	break;
	404	case BIO_CTRL_POP:
	405	/* ugly bit of a hack */
	406	if (ssl->rbio != ssl->wbio) /* we are in trouble :-( */
	407	{
	408	BIO_free_all(ssl->wbio);
	409	}
5d780bab RL	410	if (b->next_bio != NULL)
	411	{
	412	CRYPTO_add(&b->next_bio->references,1,CRYPTO_LOCK_BIO);
	413	}
d02b48c6 RE	414	ssl->wbio=NULL;
	415	ssl->rbio=NULL;
	416	break;
	417	case BIO_C_DO_STATE_MACHINE:
	418	BIO_clear_retry_flags(b);
	419
	420	b->retry_reason=0;
	421	ret=(int)SSL_do_handshake(ssl);
	422
	423	switch (SSL_get_error(ssl,(int)ret))
	424	{
	425	case SSL_ERROR_WANT_READ:
	426	BIO_set_flags(b,
	427	BIO_FLAGS_READ\|BIO_FLAGS_SHOULD_RETRY);
	428	break;
	429	case SSL_ERROR_WANT_WRITE:
	430	BIO_set_flags(b,
	431	BIO_FLAGS_WRITE\|BIO_FLAGS_SHOULD_RETRY);
	432	break;
	433	case SSL_ERROR_WANT_CONNECT:
	434	BIO_set_flags(b,
	435	BIO_FLAGS_IO_SPECIAL\|BIO_FLAGS_SHOULD_RETRY);
	436	b->retry_reason=b->next_bio->retry_reason;
	437	break;
	438	default:
	439	break;
	440	}
	441	break;
	442	case BIO_CTRL_DUP:
	443	dbio=(BIO *)ptr;
58964a49 RE	444	if (((BIO_SSL *)dbio->ptr)->ssl != NULL)
	445	SSL_free(((BIO_SSL *)dbio->ptr)->ssl);
	446	((BIO_SSL *)dbio->ptr)->ssl=SSL_dup(ssl);
	447	((BIO_SSL *)dbio->ptr)->renegotiate_count=
	448	((BIO_SSL *)b->ptr)->renegotiate_count;
	449	((BIO_SSL *)dbio->ptr)->byte_count=
	450	((BIO_SSL *)b->ptr)->byte_count;
	451	((BIO_SSL *)dbio->ptr)->renegotiate_timeout=
	452	((BIO_SSL *)b->ptr)->renegotiate_timeout;
	453	((BIO_SSL *)dbio->ptr)->last_time=
	454	((BIO_SSL *)b->ptr)->last_time;
	455	ret=(((BIO_SSL *)dbio->ptr)->ssl != NULL);
	456	break;
	457	case BIO_C_GET_FD:
	458	ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
	459	break;
	460	case BIO_CTRL_SET_CALLBACK:
a9188d4e	461	{
d3442bc7	462	#if 0 /* FIXME: Should this be used? -- Richard Levitte */
aa4ce731	463	SSLerr(SSL_F_SSL_CTRL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
d3442bc7 RL	464	ret = -1;
	465	#else
	466	ret=0;
	467	#endif
a9188d4e	468	}
58964a49 RE	469	break;
	470	case BIO_CTRL_GET_CALLBACK:
	471	{
384dba6e	472	void (*fptr)(const SSL xssl,int type,int val);
58964a49	473
384dba6e	474	fptr=(void (*)(const SSL xssl,int type,int val))ptr;
58964a49 RE	475	*fptr=SSL_get_info_callback(ssl);
58964a49 RE	476	}
d02b48c6 RE	477	break;
d02b48c6 RE	478	default:
58964a49	479	ret=BIO_ctrl(ssl->rbio,cmd,num,ptr);
d02b48c6 RE	480	break;
	481	}
	482	return(ret);
	483	}
	484
13083215	485	static long ssl_callback_ctrl(BIO b, int cmd, bio_info_cb fp)
d3442bc7 RL	486	{
	487	SSL *ssl;
	488	BIO_SSL *bs;
	489	long ret=1;
	490
	491	bs=(BIO_SSL *)b->ptr;
	492	ssl=bs->ssl;
	493	switch (cmd)
	494	{
	495	case BIO_CTRL_SET_CALLBACK:
	496	{
45d87a1f BL	497	/* FIXME: setting this via a completely different prototype
	498	seems like a crap idea */
	499	SSL_set_info_callback(ssl,(void ()(const SSL ,int,int))fp);
d3442bc7 RL	500	}
	501	break;
	502	default:
	503	ret=BIO_callback_ctrl(ssl->rbio,cmd,fp);
	504	break;
	505	}
	506	return(ret);
	507	}
	508
0e1c0612	509	static int ssl_puts(BIO bp, const char str)
d02b48c6 RE	510	{
	511	int n,ret;
	512
	513	n=strlen(str);
	514	ret=BIO_write(bp,str,n);
	515	return(ret);
	516	}
	517
6b691a5c	518	BIO BIO_new_buffer_ssl_connect(SSL_CTX ctx)
58964a49	519	{
85d686e7	520	#ifndef OPENSSL_NO_SOCK
58964a49 RE	521	BIO ret=NULL,buf=NULL,*ssl=NULL;
	522
	523	if ((buf=BIO_new(BIO_f_buffer())) == NULL)
	524	return(NULL);
	525	if ((ssl=BIO_new_ssl_connect(ctx)) == NULL)
	526	goto err;
	527	if ((ret=BIO_push(buf,ssl)) == NULL)
	528	goto err;
	529	return(ret);
	530	err:
	531	if (buf != NULL) BIO_free(buf);
	532	if (ssl != NULL) BIO_free(ssl);
85d686e7	533	#endif
58964a49 RE	534	return(NULL);
	535	}
	536
6b691a5c	537	BIO BIO_new_ssl_connect(SSL_CTX ctx)
58964a49 RE	538	{
	539	BIO ret=NULL,con=NULL,*ssl=NULL;
	540
	541	if ((con=BIO_new(BIO_s_connect())) == NULL)
	542	return(NULL);
	543	if ((ssl=BIO_new_ssl(ctx,1)) == NULL)
	544	goto err;
	545	if ((ret=BIO_push(ssl,con)) == NULL)
	546	goto err;
	547	return(ret);
	548	err:
	549	if (con != NULL) BIO_free(con);
	550	if (ret != NULL) BIO_free(ret);
	551	return(NULL);
	552	}
	553
6b691a5c	554	BIO BIO_new_ssl(SSL_CTX ctx, int client)
d02b48c6 RE	555	{
	556	BIO *ret;
	557	SSL *ssl;
	558
	559	if ((ret=BIO_new(BIO_f_ssl())) == NULL)
	560	return(NULL);
	561	if ((ssl=SSL_new(ctx)) == NULL)
	562	{
	563	BIO_free(ret);
	564	return(NULL);
	565	}
	566	if (client)
	567	SSL_set_connect_state(ssl);
	568	else
	569	SSL_set_accept_state(ssl);
	570
	571	BIO_set_ssl(ret,ssl,BIO_CLOSE);
	572	return(ret);
	573	}
	574
6b691a5c	575	int BIO_ssl_copy_session_id(BIO t, BIO f)
d02b48c6 RE	576	{
	577	t=BIO_find_type(t,BIO_TYPE_SSL);
	578	f=BIO_find_type(f,BIO_TYPE_SSL);
	579	if ((t == NULL) \|\| (f == NULL))
	580	return(0);
58964a49 RE	581	if ( (((BIO_SSL *)t->ptr)->ssl == NULL) \|\|
58964a49 RE	582	(((BIO_SSL *)f->ptr)->ssl == NULL))
d02b48c6	583	return(0);
58964a49	584	SSL_copy_session_id(((BIO_SSL )t->ptr)->ssl,((BIO_SSL )f->ptr)->ssl);
d02b48c6 RE	585	return(1);
	586	}
	587
6b691a5c	588	void BIO_ssl_shutdown(BIO *b)
d02b48c6 RE	589	{
	590	SSL *s;
	591
	592	while (b != NULL)
	593	{
	594	if (b->method->type == BIO_TYPE_SSL)
	595	{
58964a49	596	s=((BIO_SSL *)b->ptr)->ssl;
d02b48c6 RE	597	SSL_shutdown(s);
	598	break;
	599	}
	600	b=b->next_bio;
	601	}
	602	}