[thirdparty/openssl.git] / crypto / bio / bf_nbio.c

/* crypto/bio/bf_nbio.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 <errno.h>
#include "cryptlib.h"
#include "rand.h"
#include "bio.h"
#include "evp.h"

/* BIO_put and BIO_get both add to the digest,
 * BIO_gets returns the digest */

#ifndef NOPROTO
static int nbiof_write(BIO *h,char *buf,int num);
static int nbiof_read(BIO *h,char *buf,int size);
static int nbiof_puts(BIO *h,char *str);
static int nbiof_gets(BIO *h,char *str,int size);
static long nbiof_ctrl(BIO *h,int cmd,long arg1,char *arg2);
static int nbiof_new(BIO *h);
static int nbiof_free(BIO *data);
#else
static int nbiof_write();
static int nbiof_read();
static int nbiof_puts();
static int nbiof_gets();
static long nbiof_ctrl();
static int nbiof_new();
static int nbiof_free();
#endif

typedef struct nbio_test_st
	{
	/* only set if we sent a 'should retry' error */
	int lrn;
	int lwn;
	} NBIO_TEST;

static BIO_METHOD methods_nbiof=
	{
	BIO_TYPE_NBIO_TEST,
	"non-blocking IO test filter",
	nbiof_write,
	nbiof_read,
	nbiof_puts,
	nbiof_gets,
	nbiof_ctrl,
	nbiof_new,
	nbiof_free,
	};

BIO_METHOD *BIO_f_nbio_test(void)
	{
	return(&methods_nbiof);
	}

static int nbiof_new(BIO *bi)
	{
	NBIO_TEST *nt;

	nt=(NBIO_TEST *)Malloc(sizeof(NBIO_TEST));
	nt->lrn= -1;
	nt->lwn= -1;
	bi->ptr=(char *)nt;
	bi->init=1;
	bi->flags=0;
	return(1);
	}

static int nbiof_free(BIO *a)
	{
	if (a == NULL) return(0);
	if (a->ptr != NULL)
		Free(a->ptr);
	a->ptr=NULL;
	a->init=0;
	a->flags=0;
	return(1);
	}
	
static int nbiof_read(BIO *b, char *out, int outl)
	{
	NBIO_TEST *nt;
	int ret=0;
#if 0
	int num;
	unsigned char n;
#endif

	if (out == NULL) return(0);
	if (b->next_bio == NULL) return(0);
	nt=(NBIO_TEST *)b->ptr;

	BIO_clear_retry_flags(b);
#if 0
	RAND_bytes(&n,1);
	num=(n&0x07);

	if (outl > num) outl=num;

	if (num == 0)
		{
		ret= -1;
		BIO_set_retry_read(b);
		}
	else
#endif
		{
		ret=BIO_read(b->next_bio,out,outl);
		if (ret < 0)
			BIO_copy_next_retry(b);
		}
	return(ret);
	}

static int nbiof_write(BIO *b, char *in, int inl)
	{
	NBIO_TEST *nt;
	int ret=0;
	int num;
	unsigned char n;

	if ((in == NULL) || (inl <= 0)) return(0);
	if (b->next_bio == NULL) return(0);
	nt=(NBIO_TEST *)b->ptr;

	BIO_clear_retry_flags(b);

#if 1
	if (nt->lwn > 0)
		{
		num=nt->lwn;
		nt->lwn=0;
		}
	else
		{
		RAND_bytes(&n,1);
		num=(n&7);
		}

	if (inl > num) inl=num;

	if (num == 0)
		{
		ret= -1;
		BIO_set_retry_write(b);
		}
	else
#endif
		{
		ret=BIO_write(b->next_bio,in,inl);
		if (ret < 0)
			{
			BIO_copy_next_retry(b);
			nt->lwn=inl;
			}
		}
	return(ret);
	}

static long nbiof_ctrl(BIO *b, int cmd, long num, char *ptr)
	{
	long ret;

	if (b->next_bio == NULL) return(0);
	switch (cmd)
		{
        case BIO_C_DO_STATE_MACHINE:
		BIO_clear_retry_flags(b);
		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		BIO_copy_next_retry(b);
		break;
	case BIO_CTRL_DUP:
		ret=0L;
		break;
	default:
		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
		}
	return(ret);
	}

static int nbiof_gets(BIO *bp, char *buf, int size)
	{
	if (bp->next_bio == NULL) return(0);
	return(BIO_gets(bp->next_bio,buf,size));
	}


static int nbiof_puts(BIO *bp, char *str)
	{
	if (bp->next_bio == NULL) return(0);
	return(BIO_puts(bp->next_bio,str));
	}
Commit	Line	Data
d02b48c6	1	/* crypto/bio/bf_nbio.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>
	60	#include <errno.h>
	61	#include "cryptlib.h"
	62	#include "rand.h"
	63	#include "bio.h"
	64	#include "evp.h"
	65
	66	/* BIO_put and BIO_get both add to the digest,
67	* BIO_gets returns the digest */
68
69	#ifndef NOPROTO
70	static int nbiof_write(BIO h,char buf,int num);
71	static int nbiof_read(BIO h,char buf,int size);
72	static int nbiof_puts(BIO h,char str);
73	static int nbiof_gets(BIO h,char str,int size);
74	static long nbiof_ctrl(BIO h,int cmd,long arg1,char arg2);
75	static int nbiof_new(BIO *h);
76	static int nbiof_free(BIO *data);
77	#else
78	static int nbiof_write();
79	static int nbiof_read();
80	static int nbiof_puts();
81	static int nbiof_gets();
82	static long nbiof_ctrl();
83	static int nbiof_new();
84	static int nbiof_free();
85	#endif
86
87	typedef struct nbio_test_st
88	{
89	/* only set if we sent a 'should retry' error */
90	int lrn;
91	int lwn;
92	} NBIO_TEST;
93
94	static BIO_METHOD methods_nbiof=
95	{
58964a49 RE	96	BIO_TYPE_NBIO_TEST,
58964a49 RE	97	"non-blocking IO test filter",
d02b48c6 RE	98	nbiof_write,
	99	nbiof_read,
	100	nbiof_puts,
	101	nbiof_gets,
	102	nbiof_ctrl,
	103	nbiof_new,
	104	nbiof_free,
	105	};
	106
6b691a5c	107	BIO_METHOD *BIO_f_nbio_test(void)
d02b48c6 RE	108	{
	109	return(&methods_nbiof);
	110	}
	111
6b691a5c	112	static int nbiof_new(BIO *bi)
d02b48c6 RE	113	{
	114	NBIO_TEST *nt;
	115
	116	nt=(NBIO_TEST *)Malloc(sizeof(NBIO_TEST));
	117	nt->lrn= -1;
	118	nt->lwn= -1;
	119	bi->ptr=(char *)nt;
	120	bi->init=1;
	121	bi->flags=0;
	122	return(1);
	123	}
	124
6b691a5c	125	static int nbiof_free(BIO *a)
d02b48c6 RE	126	{
	127	if (a == NULL) return(0);
	128	if (a->ptr != NULL)
	129	Free(a->ptr);
	130	a->ptr=NULL;
	131	a->init=0;
	132	a->flags=0;
	133	return(1);
	134	}
	135
6b691a5c	136	static int nbiof_read(BIO b, char out, int outl)
d02b48c6 RE	137	{
	138	NBIO_TEST *nt;
	139	int ret=0;
	140	#if 0
	141	int num;
	142	unsigned char n;
	143	#endif
	144
	145	if (out == NULL) return(0);
	146	if (b->next_bio == NULL) return(0);
	147	nt=(NBIO_TEST *)b->ptr;
	148
	149	BIO_clear_retry_flags(b);
	150	#if 0
	151	RAND_bytes(&n,1);
	152	num=(n&0x07);
	153
	154	if (outl > num) outl=num;
	155
	156	if (num == 0)
	157	{
	158	ret= -1;
	159	BIO_set_retry_read(b);
	160	}
	161	else
	162	#endif
	163	{
	164	ret=BIO_read(b->next_bio,out,outl);
	165	if (ret < 0)
	166	BIO_copy_next_retry(b);
	167	}
	168	return(ret);
	169	}
	170
6b691a5c	171	static int nbiof_write(BIO b, char in, int inl)
d02b48c6 RE	172	{
	173	NBIO_TEST *nt;
	174	int ret=0;
	175	int num;
	176	unsigned char n;
	177
	178	if ((in == NULL) \|\| (inl <= 0)) return(0);
	179	if (b->next_bio == NULL) return(0);
	180	nt=(NBIO_TEST *)b->ptr;
	181
	182	BIO_clear_retry_flags(b);
	183
	184	#if 1
	185	if (nt->lwn > 0)
	186	{
	187	num=nt->lwn;
	188	nt->lwn=0;
	189	}
	190	else
	191	{
	192	RAND_bytes(&n,1);
	193	num=(n&7);
	194	}
	195
	196	if (inl > num) inl=num;
	197
	198	if (num == 0)
	199	{
	200	ret= -1;
	201	BIO_set_retry_write(b);
	202	}
	203	else
	204	#endif
	205	{
	206	ret=BIO_write(b->next_bio,in,inl);
	207	if (ret < 0)
	208	{
	209	BIO_copy_next_retry(b);
	210	nt->lwn=inl;
	211	}
	212	}
	213	return(ret);
	214	}
	215
6b691a5c	216	static long nbiof_ctrl(BIO b, int cmd, long num, char ptr)
d02b48c6 RE	217	{
	218	long ret;
	219
	220	if (b->next_bio == NULL) return(0);
	221	switch (cmd)
	222	{
	223	case BIO_C_DO_STATE_MACHINE:
	224	BIO_clear_retry_flags(b);
	225	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	226	BIO_copy_next_retry(b);
	227	break;
	228	case BIO_CTRL_DUP:
58964a49	229	ret=0L;
d02b48c6 RE	230	break;
	231	default:
	232	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	233	break;
	234	}
	235	return(ret);
	236	}
	237
6b691a5c	238	static int nbiof_gets(BIO bp, char buf, int size)
d02b48c6 RE	239	{
	240	if (bp->next_bio == NULL) return(0);
	241	return(BIO_gets(bp->next_bio,buf,size));
	242	}
	243
	244
6b691a5c	245	static int nbiof_puts(BIO bp, char str)
d02b48c6 RE	246	{
	247	if (bp->next_bio == NULL) return(0);
	248	return(BIO_puts(bp->next_bio,str));
	249	}
	250
	251