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

/* crypto/bio/bf_buff.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 <openssl/bio.h>
#include <openssl/evp.h>

#ifndef NOPROTO
static int buffer_write(BIO *h,char *buf,int num);
static int buffer_read(BIO *h,char *buf,int size);
static int buffer_puts(BIO *h,char *str);
static int buffer_gets(BIO *h,char *str,int size);
static long buffer_ctrl(BIO *h,int cmd,long arg1,char *arg2);
static int buffer_new(BIO *h);
static int buffer_free(BIO *data);
#else
static int buffer_write();
static int buffer_read();
static int buffer_puts();
static int buffer_gets();
static long buffer_ctrl();
static int buffer_new();
static int buffer_free();
#endif

#define DEFAULT_BUFFER_SIZE	1024

static BIO_METHOD methods_buffer=
	{
	BIO_TYPE_BUFFER,
	"buffer",
	buffer_write,
	buffer_read,
	buffer_puts,
	buffer_gets,
	buffer_ctrl,
	buffer_new,
	buffer_free,
	};

BIO_METHOD *BIO_f_buffer(void)
	{
	return(&methods_buffer);
	}

static int buffer_new(BIO *bi)
	{
	BIO_F_BUFFER_CTX *ctx;

	ctx=(BIO_F_BUFFER_CTX *)Malloc(sizeof(BIO_F_BUFFER_CTX));
	if (ctx == NULL) return(0);
	ctx->ibuf=(char *)Malloc(DEFAULT_BUFFER_SIZE);
	if (ctx->ibuf == NULL) { Free(ctx); return(0); }
	ctx->obuf=(char *)Malloc(DEFAULT_BUFFER_SIZE);
	if (ctx->obuf == NULL) { Free(ctx->ibuf); Free(ctx); return(0); }
	ctx->ibuf_size=DEFAULT_BUFFER_SIZE;
	ctx->obuf_size=DEFAULT_BUFFER_SIZE;
	ctx->ibuf_len=0;
	ctx->ibuf_off=0;
	ctx->obuf_len=0;
	ctx->obuf_off=0;

	bi->init=1;
	bi->ptr=(char *)ctx;
	bi->flags=0;
	return(1);
	}

static int buffer_free(BIO *a)
	{
	BIO_F_BUFFER_CTX *b;

	if (a == NULL) return(0);
	b=(BIO_F_BUFFER_CTX *)a->ptr;
	if (b->ibuf != NULL) Free(b->ibuf);
	if (b->obuf != NULL) Free(b->obuf);
	Free(a->ptr);
	a->ptr=NULL;
	a->init=0;
	a->flags=0;
	return(1);
	}
	
static int buffer_read(BIO *b, char *out, int outl)
	{
	int i,num=0;
	BIO_F_BUFFER_CTX *ctx;

	if (out == NULL) return(0);
	ctx=(BIO_F_BUFFER_CTX *)b->ptr;

	if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
	num=0;
	BIO_clear_retry_flags(b);

start:
	i=ctx->ibuf_len;
	/* If there is stuff left over, grab it */
	if (i != 0)
		{
		if (i > outl) i=outl;
		memcpy(out,&(ctx->ibuf[ctx->ibuf_off]),i);
		ctx->ibuf_off+=i;
		ctx->ibuf_len-=i;
		num+=i;
		if (outl == i)  return(num);
		outl-=i;
		out+=i;
		}

	/* We may have done a partial read. try to do more.
	 * We have nothing in the buffer.
	 * If we get an error and have read some data, just return it
	 * and let them retry to get the error again.
	 * copy direct to parent address space */
	if (outl > ctx->ibuf_size)
		{
		for (;;)
			{
			i=BIO_read(b->next_bio,out,outl);
			if (i <= 0)
				{
				BIO_copy_next_retry(b);
				if (i < 0) return((num > 0)?num:i);
				if (i == 0) return(num);
				}
			num+=i;
			if (outl == i) return(num);
			out+=i;
			outl-=i;
			}
		}
	/* else */

	/* we are going to be doing some buffering */
	i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size);
	if (i <= 0)
		{
		BIO_copy_next_retry(b);
		if (i < 0) return((num > 0)?num:i);
		if (i == 0) return(num);
		}
	ctx->ibuf_off=0;
	ctx->ibuf_len=i;

	/* Lets re-read using ourselves :-) */
	goto start;
	}

static int buffer_write(BIO *b, char *in, int inl)
	{
	int i,num=0;
	BIO_F_BUFFER_CTX *ctx;

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

	BIO_clear_retry_flags(b);
start:
	i=ctx->obuf_size-(ctx->obuf_len+ctx->obuf_off);
	/* add to buffer and return */
	if (i >= inl)
		{
		memcpy(&(ctx->obuf[ctx->obuf_len]),in,inl);
		ctx->obuf_len+=inl;
		return(num+inl);
		}
	/* else */
	/* stuff already in buffer, so add to it first, then flush */
	if (ctx->obuf_len != 0)
		{
		if (i > 0) /* lets fill it up if we can */
			{
			memcpy(&(ctx->obuf[ctx->obuf_len]),in,i);
			in+=i;
			inl-=i;
			num+=i;
			ctx->obuf_len+=i;
			}
		/* we now have a full buffer needing flushing */
		for (;;)
			{
			i=BIO_write(b->next_bio,&(ctx->obuf[ctx->obuf_off]),
				ctx->obuf_len);
			if (i <= 0)
				{
				BIO_copy_next_retry(b);

				if (i < 0) return((num > 0)?num:i);
				if (i == 0) return(num);
				}
			ctx->obuf_off+=i;
			ctx->obuf_len-=i;
			if (ctx->obuf_len == 0) break;
			}
		}
	/* we only get here if the buffer has been flushed and we
	 * still have stuff to write */
	ctx->obuf_off=0;

	/* we now have inl bytes to write */
	while (inl >= ctx->obuf_size)
		{
		i=BIO_write(b->next_bio,in,inl);
		if (i <= 0)
			{
			BIO_copy_next_retry(b);
			if (i < 0) return((num > 0)?num:i);
			if (i == 0) return(num);
			}
		num+=i;
		in+=i;
		inl-=i;
		if (inl == 0) return(num);
		}

	/* copy the rest into the buffer since we have only a small 
	 * amount left */
	goto start;
	}

static long buffer_ctrl(BIO *b, int cmd, long num, char *ptr)
	{
	BIO *dbio;
	BIO_F_BUFFER_CTX *ctx;
	long ret=1;
	char *p1,*p2;
	int r,i,*ip;
	int ibs,obs;

	ctx=(BIO_F_BUFFER_CTX *)b->ptr;

	switch (cmd)
		{
	case BIO_CTRL_RESET:
		ctx->ibuf_off=0;
		ctx->ibuf_len=0;
		ctx->obuf_off=0;
		ctx->obuf_len=0;
		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
	case BIO_CTRL_INFO:
		ret=(long)ctx->obuf_len;
		break;
	case BIO_C_GET_BUFF_NUM_LINES:
		ret=0;
		p1=ctx->ibuf;
		for (i=ctx->ibuf_off; i<ctx->ibuf_len; i++)
			{
			if (p1[i] == '\n') ret++;
			}
		break;
	case BIO_CTRL_WPENDING:
		ret=(long)ctx->obuf_len;
		if (ret == 0)
			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
	case BIO_CTRL_PENDING:
		ret=(long)ctx->ibuf_len;
		if (ret == 0)
			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
	case BIO_C_SET_BUFF_READ_DATA:
		if (num > ctx->ibuf_size)
			{
			p1=Malloc((int)num);
			if (p1 == NULL) goto malloc_error;
			if (ctx->ibuf != NULL) Free(ctx->ibuf);
			ctx->ibuf=p1;
			}
		ctx->ibuf_off=0;
		ctx->ibuf_len=(int)num;
		memcpy(ctx->ibuf,ptr,(int)num);
		ret=1;
		break;
	case BIO_C_SET_BUFF_SIZE:
		if (ptr != NULL)
			{
			ip=(int *)ptr;
			if (*ip == 0)
				{
				ibs=(int)num;
				obs=ctx->obuf_size;
				}
			else /* if (*ip == 1) */
				{
				ibs=ctx->ibuf_size;
				obs=(int)num;
				}
			}
		else
			{
			ibs=(int)num;
			obs=(int)num;
			}
		p1=ctx->ibuf;
		p2=ctx->obuf;
		if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size))
			{
			p1=(char *)Malloc((int)num);
			if (p1 == NULL) goto malloc_error;
			}
		if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size))
			{
			p2=(char *)Malloc((int)num);
			if (p2 == NULL)
				{
				if (p1 != ctx->ibuf) Free(p1);
				goto malloc_error;
				}
			}
		if (ctx->ibuf != p1)
			{
			Free(ctx->ibuf);
			ctx->ibuf=p1;
			ctx->ibuf_off=0;
			ctx->ibuf_len=0;
			ctx->ibuf_size=ibs;
			}
		if (ctx->obuf != p2)
			{
			Free(ctx->obuf);
			ctx->obuf=p2;
			ctx->obuf_off=0;
			ctx->obuf_len=0;
			ctx->obuf_size=obs;
			}
		break;
	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_FLUSH:
		if (ctx->obuf_len <= 0)
			{
			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
			break;
			}

		for (;;)
			{
			BIO_clear_retry_flags(b);
			if (ctx->obuf_len > ctx->obuf_off)
				{
				r=BIO_write(b->next_bio,
					&(ctx->obuf[ctx->obuf_off]),
					ctx->obuf_len-ctx->obuf_off);
#if 0
fprintf(stderr,"FLUSH [%3d] %3d -> %3d\n",ctx->obuf_off,ctx->obuf_len-ctx->obuf_off,r);
#endif
				BIO_copy_next_retry(b);
				if (r <= 0) return((long)r);
				ctx->obuf_off+=r;
				}
			else
				{
				ctx->obuf_len=0;
				ctx->obuf_off=0;
				ret=1;
				break;
				}
			}
		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
	case BIO_CTRL_DUP:
		dbio=(BIO *)ptr;
		if (	!BIO_set_read_buffer_size(dbio,ctx->ibuf_size) ||
			!BIO_set_write_buffer_size(dbio,ctx->obuf_size))
			ret=0;
		break;
	default:
		ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
		break;
		}
	return(ret);
malloc_error:
	BIOerr(BIO_F_BUFFER_CTRL,ERR_R_MALLOC_FAILURE);
	return(0);
	}

static int buffer_gets(BIO *b, char *buf, int size)
	{
	BIO_F_BUFFER_CTX *ctx;
	int num=0,i,flag;
	char *p;

	ctx=(BIO_F_BUFFER_CTX *)b->ptr;
	size--; /* reserve space for a '\0' */
	BIO_clear_retry_flags(b);

	for (;;)
		{
		if (ctx->ibuf_len > 0)
			{
			p= &(ctx->ibuf[ctx->ibuf_off]);
			flag=0;
			for (i=0; (i<ctx->ibuf_len) && (i<size); i++)
				{
				*(buf++)=p[i];
				if (p[i] == '\n')
					{
					flag=1;
					i++;
					break;
					}
				}
			num+=i;
			size-=i;
			ctx->ibuf_len-=i;
			ctx->ibuf_off+=i;
			if ((flag) || (i == size))
				{
				*buf='\0';
				return(num);
				}
			}
		else	/* read another chunk */
			{
			i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size);
			if (i <= 0)
				{
				BIO_copy_next_retry(b);
				if (i < 0) return((num > 0)?num:i);
				if (i == 0) return(num);
				}
			ctx->ibuf_len=i;
			ctx->ibuf_off=0;
			}
		}
	}

static int buffer_puts(BIO *b, char *str)
	{
	return(BIO_write(b,str,strlen(str)));
	}
Commit	Line	Data
d02b48c6	1	/* crypto/bio/bf_buff.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"
ec577822 BM	62	#include <openssl/bio.h>
ec577822 BM	63	#include <openssl/evp.h>
d02b48c6 RE	64
	65	#ifndef NOPROTO
	66	static int buffer_write(BIO h,char buf,int num);
	67	static int buffer_read(BIO h,char buf,int size);
	68	static int buffer_puts(BIO h,char str);
	69	static int buffer_gets(BIO h,char str,int size);
	70	static long buffer_ctrl(BIO h,int cmd,long arg1,char arg2);
	71	static int buffer_new(BIO *h);
	72	static int buffer_free(BIO *data);
	73	#else
	74	static int buffer_write();
	75	static int buffer_read();
	76	static int buffer_puts();
	77	static int buffer_gets();
	78	static long buffer_ctrl();
	79	static int buffer_new();
	80	static int buffer_free();
	81	#endif
	82
	83	#define DEFAULT_BUFFER_SIZE 1024
	84
	85	static BIO_METHOD methods_buffer=
	86	{
58964a49 RE	87	BIO_TYPE_BUFFER,
58964a49 RE	88	"buffer",
d02b48c6 RE	89	buffer_write,
	90	buffer_read,
	91	buffer_puts,
	92	buffer_gets,
	93	buffer_ctrl,
	94	buffer_new,
	95	buffer_free,
	96	};
	97
6b691a5c	98	BIO_METHOD *BIO_f_buffer(void)
d02b48c6 RE	99	{
	100	return(&methods_buffer);
	101	}
	102
6b691a5c	103	static int buffer_new(BIO *bi)
d02b48c6 RE	104	{
	105	BIO_F_BUFFER_CTX *ctx;
	106
	107	ctx=(BIO_F_BUFFER_CTX *)Malloc(sizeof(BIO_F_BUFFER_CTX));
	108	if (ctx == NULL) return(0);
	109	ctx->ibuf=(char *)Malloc(DEFAULT_BUFFER_SIZE);
	110	if (ctx->ibuf == NULL) { Free(ctx); return(0); }
	111	ctx->obuf=(char *)Malloc(DEFAULT_BUFFER_SIZE);
	112	if (ctx->obuf == NULL) { Free(ctx->ibuf); Free(ctx); return(0); }
	113	ctx->ibuf_size=DEFAULT_BUFFER_SIZE;
	114	ctx->obuf_size=DEFAULT_BUFFER_SIZE;
	115	ctx->ibuf_len=0;
	116	ctx->ibuf_off=0;
	117	ctx->obuf_len=0;
	118	ctx->obuf_off=0;
	119
	120	bi->init=1;
	121	bi->ptr=(char *)ctx;
	122	bi->flags=0;
	123	return(1);
	124	}
	125
6b691a5c	126	static int buffer_free(BIO *a)
d02b48c6 RE	127	{
	128	BIO_F_BUFFER_CTX *b;
	129
	130	if (a == NULL) return(0);
	131	b=(BIO_F_BUFFER_CTX *)a->ptr;
	132	if (b->ibuf != NULL) Free(b->ibuf);
	133	if (b->obuf != NULL) Free(b->obuf);
	134	Free(a->ptr);
	135	a->ptr=NULL;
	136	a->init=0;
	137	a->flags=0;
	138	return(1);
	139	}
	140
6b691a5c	141	static int buffer_read(BIO b, char out, int outl)
d02b48c6 RE	142	{
	143	int i,num=0;
	144	BIO_F_BUFFER_CTX *ctx;
	145
	146	if (out == NULL) return(0);
	147	ctx=(BIO_F_BUFFER_CTX *)b->ptr;
	148
	149	if ((ctx == NULL) \|\| (b->next_bio == NULL)) return(0);
	150	num=0;
	151	BIO_clear_retry_flags(b);
	152
	153	start:
	154	i=ctx->ibuf_len;
	155	/* If there is stuff left over, grab it */
	156	if (i != 0)
	157	{
	158	if (i > outl) i=outl;
	159	memcpy(out,&(ctx->ibuf[ctx->ibuf_off]),i);
	160	ctx->ibuf_off+=i;
	161	ctx->ibuf_len-=i;
	162	num+=i;
	163	if (outl == i) return(num);
	164	outl-=i;
	165	out+=i;
	166	}
	167
	168	/* We may have done a partial read. try to do more.
	169	* We have nothing in the buffer.
	170	* If we get an error and have read some data, just return it
	171	* and let them retry to get the error again.
	172	* copy direct to parent address space */
	173	if (outl > ctx->ibuf_size)
	174	{
	175	for (;;)
	176	{
	177	i=BIO_read(b->next_bio,out,outl);
	178	if (i <= 0)
	179	{
	180	BIO_copy_next_retry(b);
	181	if (i < 0) return((num > 0)?num:i);
	182	if (i == 0) return(num);
	183	}
	184	num+=i;
	185	if (outl == i) return(num);
	186	out+=i;
	187	outl-=i;
	188	}
	189	}
	190	/* else */
	191
	192	/* we are going to be doing some buffering */
	193	i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size);
	194	if (i <= 0)
	195	{
	196	BIO_copy_next_retry(b);
	197	if (i < 0) return((num > 0)?num:i);
	198	if (i == 0) return(num);
	199	}
	200	ctx->ibuf_off=0;
	201	ctx->ibuf_len=i;
	202
	203	/* Lets re-read using ourselves :-) */
	204	goto start;
	205	}
206
6b691a5c	207	static int buffer_write(BIO b, char in, int inl)
d02b48c6 RE	208	{
	209	int i,num=0;
	210	BIO_F_BUFFER_CTX *ctx;
	211
	212	if ((in == NULL) \|\| (inl <= 0)) return(0);
	213	ctx=(BIO_F_BUFFER_CTX *)b->ptr;
	214	if ((ctx == NULL) \|\| (b->next_bio == NULL)) return(0);
	215
	216	BIO_clear_retry_flags(b);
	217	start:
	218	i=ctx->obuf_size-(ctx->obuf_len+ctx->obuf_off);
	219	/* add to buffer and return */
	220	if (i >= inl)
	221	{
	222	memcpy(&(ctx->obuf[ctx->obuf_len]),in,inl);
	223	ctx->obuf_len+=inl;
	224	return(num+inl);
	225	}
	226	/* else */
	227	/* stuff already in buffer, so add to it first, then flush */
	228	if (ctx->obuf_len != 0)
	229	{
	230	if (i > 0) /* lets fill it up if we can */
	231	{
	232	memcpy(&(ctx->obuf[ctx->obuf_len]),in,i);
	233	in+=i;
	234	inl-=i;
	235	num+=i;
	236	ctx->obuf_len+=i;
	237	}
	238	/* we now have a full buffer needing flushing */
	239	for (;;)
	240	{
	241	i=BIO_write(b->next_bio,&(ctx->obuf[ctx->obuf_off]),
	242	ctx->obuf_len);
	243	if (i <= 0)
	244	{
	245	BIO_copy_next_retry(b);
	246
	247	if (i < 0) return((num > 0)?num:i);
	248	if (i == 0) return(num);
	249	}
	250	ctx->obuf_off+=i;
	251	ctx->obuf_len-=i;
	252	if (ctx->obuf_len == 0) break;
	253	}
	254	}
	255	/* we only get here if the buffer has been flushed and we
	256	* still have stuff to write */
	257	ctx->obuf_off=0;
	258
	259	/* we now have inl bytes to write */
	260	while (inl >= ctx->obuf_size)
	261	{
	262	i=BIO_write(b->next_bio,in,inl);
	263	if (i <= 0)
	264	{
	265	BIO_copy_next_retry(b);
	266	if (i < 0) return((num > 0)?num:i);
	267	if (i == 0) return(num);
	268	}
	269	num+=i;
	270	in+=i;
	271	inl-=i;
272	if (inl == 0) return(num);
273	}
274
275	/* copy the rest into the buffer since we have only a small
276	* amount left */
277	goto start;
278	}
279
6b691a5c	280	static long buffer_ctrl(BIO b, int cmd, long num, char ptr)
d02b48c6 RE	281	{
	282	BIO *dbio;
	283	BIO_F_BUFFER_CTX *ctx;
	284	long ret=1;
	285	char p1,p2;
	286	int r,i,*ip;
	287	int ibs,obs;
	288
	289	ctx=(BIO_F_BUFFER_CTX *)b->ptr;
	290
	291	switch (cmd)
	292	{
	293	case BIO_CTRL_RESET:
	294	ctx->ibuf_off=0;
	295	ctx->ibuf_len=0;
	296	ctx->obuf_off=0;
	297	ctx->obuf_len=0;
	298	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	299	break;
	300	case BIO_CTRL_INFO:
	301	ret=(long)ctx->obuf_len;
	302	break;
	303	case BIO_C_GET_BUFF_NUM_LINES:
	304	ret=0;
	305	p1=ctx->ibuf;
	306	for (i=ctx->ibuf_off; i<ctx->ibuf_len; i++)
	307	{
	308	if (p1[i] == '\n') ret++;
	309	}
	310	break;
	311	case BIO_CTRL_WPENDING:
	312	ret=(long)ctx->obuf_len;
	313	if (ret == 0)
	314	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	315	break;
	316	case BIO_CTRL_PENDING:
	317	ret=(long)ctx->ibuf_len;
	318	if (ret == 0)
	319	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	320	break;
58964a49 RE	321	case BIO_C_SET_BUFF_READ_DATA:
	322	if (num > ctx->ibuf_size)
	323	{
	324	p1=Malloc((int)num);
	325	if (p1 == NULL) goto malloc_error;
	326	if (ctx->ibuf != NULL) Free(ctx->ibuf);
	327	ctx->ibuf=p1;
	328	}
	329	ctx->ibuf_off=0;
	330	ctx->ibuf_len=(int)num;
	331	memcpy(ctx->ibuf,ptr,(int)num);
	332	ret=1;
	333	break;
d02b48c6 RE	334	case BIO_C_SET_BUFF_SIZE:
	335	if (ptr != NULL)
	336	{
	337	ip=(int *)ptr;
	338	if (*ip == 0)
	339	{
	340	ibs=(int)num;
	341	obs=ctx->obuf_size;
	342	}
	343	else /* if (ip == 1) /
	344	{
	345	ibs=ctx->ibuf_size;
	346	obs=(int)num;
	347	}
	348	}
	349	else
	350	{
	351	ibs=(int)num;
	352	obs=(int)num;
	353	}
	354	p1=ctx->ibuf;
	355	p2=ctx->obuf;
	356	if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size))
	357	{
	358	p1=(char *)Malloc((int)num);
58964a49	359	if (p1 == NULL) goto malloc_error;
d02b48c6 RE	360	}
	361	if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size))
	362	{
	363	p2=(char *)Malloc((int)num);
	364	if (p2 == NULL)
	365	{
d02b48c6	366	if (p1 != ctx->ibuf) Free(p1);
58964a49	367	goto malloc_error;
d02b48c6 RE	368	}
	369	}
	370	if (ctx->ibuf != p1)
	371	{
	372	Free(ctx->ibuf);
	373	ctx->ibuf=p1;
	374	ctx->ibuf_off=0;
	375	ctx->ibuf_len=0;
	376	ctx->ibuf_size=ibs;
	377	}
	378	if (ctx->obuf != p2)
	379	{
	380	Free(ctx->obuf);
	381	ctx->obuf=p2;
	382	ctx->obuf_off=0;
	383	ctx->obuf_len=0;
	384	ctx->obuf_size=obs;
	385	}
	386	break;
	387	case BIO_C_DO_STATE_MACHINE:
	388	BIO_clear_retry_flags(b);
	389	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	390	BIO_copy_next_retry(b);
	391	break;
	392
	393	case BIO_CTRL_FLUSH:
	394	if (ctx->obuf_len <= 0)
58964a49 RE	395	{
58964a49 RE	396	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
d02b48c6	397	break;
58964a49	398	}
d02b48c6 RE	399
	400	for (;;)
	401	{
	402	BIO_clear_retry_flags(b);
	403	if (ctx->obuf_len > ctx->obuf_off)
	404	{
	405	r=BIO_write(b->next_bio,
	406	&(ctx->obuf[ctx->obuf_off]),
	407	ctx->obuf_len-ctx->obuf_off);
	408	#if 0
	409	fprintf(stderr,"FLUSH [%3d] %3d -> %3d\n",ctx->obuf_off,ctx->obuf_len-ctx->obuf_off,r);
	410	#endif
	411	BIO_copy_next_retry(b);
	412	if (r <= 0) return((long)r);
	413	ctx->obuf_off+=r;
	414	}
	415	else
	416	{
	417	ctx->obuf_len=0;
	418	ctx->obuf_off=0;
	419	ret=1;
	420	break;
	421	}
	422	}
b5e406f7	423	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
d02b48c6 RE	424	break;
	425	case BIO_CTRL_DUP:
	426	dbio=(BIO *)ptr;
	427	if ( !BIO_set_read_buffer_size(dbio,ctx->ibuf_size) \|\|
	428	!BIO_set_write_buffer_size(dbio,ctx->obuf_size))
	429	ret=0;
	430	break;
	431	default:
	432	ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
	433	break;
	434	}
	435	return(ret);
58964a49 RE	436	malloc_error:
	437	BIOerr(BIO_F_BUFFER_CTRL,ERR_R_MALLOC_FAILURE);
	438	return(0);
d02b48c6 RE	439	}
d02b48c6 RE	440
6b691a5c	441	static int buffer_gets(BIO b, char buf, int size)
d02b48c6 RE	442	{
d02b48c6 RE	443	BIO_F_BUFFER_CTX *ctx;
58964a49	444	int num=0,i,flag;
d02b48c6 RE	445	char *p;
	446
	447	ctx=(BIO_F_BUFFER_CTX *)b->ptr;
58964a49	448	size--; /* reserve space for a '\0' */
d02b48c6 RE	449	BIO_clear_retry_flags(b);
	450
	451	for (;;)
	452	{
58964a49	453	if (ctx->ibuf_len > 0)
d02b48c6 RE	454	{
d02b48c6 RE	455	p= &(ctx->ibuf[ctx->ibuf_off]);
58964a49 RE	456	flag=0;
58964a49 RE	457	for (i=0; (i<ctx->ibuf_len) && (i<size); i++)
d02b48c6 RE	458	{
d02b48c6 RE	459	*(buf++)=p[i];
58964a49 RE	460	if (p[i] == '\n')
	461	{
	462	flag=1;
	463	i++;
	464	break;
	465	}
d02b48c6 RE	466	}
	467	num+=i;
	468	size-=i;
	469	ctx->ibuf_len-=i;
	470	ctx->ibuf_off+=i;
58964a49	471	if ((flag) \|\| (i == size))
d02b48c6	472	{
58964a49	473	*buf='\0';
d02b48c6 RE	474	return(num);
	475	}
	476	}
	477	else /* read another chunk */
	478	{
	479	i=BIO_read(b->next_bio,ctx->ibuf,ctx->ibuf_size);
	480	if (i <= 0)
	481	{
	482	BIO_copy_next_retry(b);
	483	if (i < 0) return((num > 0)?num:i);
	484	if (i == 0) return(num);
	485	}
	486	ctx->ibuf_len=i;
	487	ctx->ibuf_off=0;
	488	}
	489	}
	490	}
	491
6b691a5c	492	static int buffer_puts(BIO b, char str)
d02b48c6 RE	493	{
	494	return(BIO_write(b,str,strlen(str)));
	495	}
	496