--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ssl/libcrypto/src/crypto/bio/bf_buff.c	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,511 @@
+/* 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>
+
+static int buffer_write(BIO *h, const char *buf,int num);
+static int buffer_read(BIO *h, char *buf, int size);
+static int buffer_puts(BIO *h, const char *str);
+static int buffer_gets(BIO *h, char *str, int size);
+static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
+static int buffer_new(BIO *h);
+static int buffer_free(BIO *data);
+static long buffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
+#define DEFAULT_BUFFER_SIZE	4096
+
+static BIO_METHOD methods_buffer=
+	{
+	BIO_TYPE_BUFFER,
+	"buffer",
+	buffer_write,
+	buffer_read,
+	buffer_puts,
+	buffer_gets,
+	buffer_ctrl,
+	buffer_new,
+	buffer_free,
+	buffer_callback_ctrl,
+	};
+
+EXPORT_C 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 *)OPENSSL_malloc(sizeof(BIO_F_BUFFER_CTX));
+	if (ctx == NULL) return(0);
+	ctx->ibuf=(char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
+	if (ctx->ibuf == NULL) { OPENSSL_free(ctx); return(0); }
+	ctx->obuf=(char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
+	if (ctx->obuf == NULL) { OPENSSL_free(ctx->ibuf); OPENSSL_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) OPENSSL_free(b->ibuf);
+	if (b->obuf != NULL) OPENSSL_free(b->obuf);
+	OPENSSL_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, const 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, void *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;
+		if (b->next_bio == NULL) return(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)
+			{
+			if (b->next_bio == NULL) return(0);
+			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+			}
+		break;
+	case BIO_CTRL_PENDING:
+		ret=(long)ctx->ibuf_len;
+		if (ret == 0)
+			{
+			if (b->next_bio == NULL) return(0);
+			ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
+			}
+		break;
+	case BIO_C_SET_BUFF_READ_DATA:
+		if (num > ctx->ibuf_size)
+			{
+			p1=OPENSSL_malloc((int)num);
+			if (p1 == NULL) goto malloc_error;
+			if (ctx->ibuf != NULL) OPENSSL_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 *)OPENSSL_malloc((int)num);
+			if (p1 == NULL) goto malloc_error;
+			}
+		if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size))
+			{
+			p2=(char *)OPENSSL_malloc((int)num);
+			if (p2 == NULL)
+				{
+				if (p1 != ctx->ibuf) OPENSSL_free(p1);
+				goto malloc_error;
+				}
+			}
+		if (ctx->ibuf != p1)
+			{
+			OPENSSL_free(ctx->ibuf);
+			ctx->ibuf=p1;
+			ctx->ibuf_off=0;
+			ctx->ibuf_len=0;
+			ctx->ibuf_size=ibs;
+			}
+		if (ctx->obuf != p2)
+			{
+			OPENSSL_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:
+		if (b->next_bio == NULL) return(0);
+		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 (b->next_bio == NULL) return(0);
+		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:
+		if (b->next_bio == NULL) return(0);
+		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 long buffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
+	{
+	long ret=1;
+
+	if (b->next_bio == NULL) return(0);
+	switch (cmd)
+		{
+	default:
+		ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
+		break;
+		}
+	return(ret);
+	}
+
+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 || size == 0)
+				{
+				*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);
+				*buf='\0';
+				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, const char *str)
+	{
+	return(buffer_write(b,str,strlen(str)));
+	}
+