sl@0: /* crypto/bio/bss_mem.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0: 
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include <errno.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/bio.h>
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libcrypto_wsd_macros.h"
sl@0: #include "libcrypto_wsd.h"
sl@0: #endif
sl@0: 
sl@0: static int mem_write(BIO *h, const char *buf, int num);
sl@0: static int mem_read(BIO *h, char *buf, int size);
sl@0: static int mem_puts(BIO *h, const char *str);
sl@0: static int mem_gets(BIO *h, char *str, int size);
sl@0: static long mem_ctrl(BIO *h, int cmd, long arg1, void *arg2);
sl@0: static int mem_new(BIO *h);
sl@0: static int mem_free(BIO *data);
sl@0: #ifndef EMULATOR
sl@0: static BIO_METHOD mem_method=
sl@0: 	{
sl@0: 	BIO_TYPE_MEM,
sl@0: 	"memory buffer",
sl@0: 	mem_write,
sl@0: 	mem_read,
sl@0: 	mem_puts,
sl@0: 	mem_gets,
sl@0: 	mem_ctrl,
sl@0: 	mem_new,
sl@0: 	mem_free,
sl@0: 	NULL,
sl@0: 	};
sl@0: #else
sl@0: GET_STATIC_VAR_FROM_TLS(mem_method,bss_mem,BIO_METHOD)
sl@0: #define mem_method (*GET_WSD_VAR_NAME(mem_method,bss_mem,s)())
sl@0: const BIO_METHOD temp_s_mem_method=
sl@0: 	{
sl@0: 	BIO_TYPE_MEM,
sl@0: 	"memory buffer",
sl@0: 	mem_write,
sl@0: 	mem_read,
sl@0: 	mem_puts,
sl@0: 	mem_gets,
sl@0: 	mem_ctrl,
sl@0: 	mem_new,
sl@0: 	mem_free,
sl@0: 	NULL,
sl@0: 	};
sl@0:   
sl@0: 
sl@0: #endif
sl@0: /* bio->num is used to hold the value to return on 'empty', if it is
sl@0:  * 0, should_retry is not set */
sl@0: 
sl@0: EXPORT_C BIO_METHOD *BIO_s_mem(void)
sl@0: 	{
sl@0: 	return(&mem_method);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C BIO *BIO_new_mem_buf(void *buf, int len)
sl@0: {
sl@0: 	BIO *ret;
sl@0: 	BUF_MEM *b;
sl@0: 	if (!buf) {
sl@0: 		BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER);
sl@0: 		return NULL;
sl@0: 	}
sl@0: 	if(len == -1) len = strlen(buf);
sl@0: 	if(!(ret = BIO_new(BIO_s_mem())) ) return NULL;
sl@0: 	b = (BUF_MEM *)ret->ptr;
sl@0: 	b->data = buf;
sl@0: 	b->length = len;
sl@0: 	b->max = len;
sl@0: 	ret->flags |= BIO_FLAGS_MEM_RDONLY;
sl@0: 	/* Since this is static data retrying wont help */
sl@0: 	ret->num = 0;
sl@0: 	return ret;
sl@0: }
sl@0: 
sl@0: static int mem_new(BIO *bi)
sl@0: 	{
sl@0: 	BUF_MEM *b;
sl@0: 
sl@0: 	if ((b=BUF_MEM_new()) == NULL)
sl@0: 		return(0);
sl@0: 	bi->shutdown=1;
sl@0: 	bi->init=1;
sl@0: 	bi->num= -1;
sl@0: 	bi->ptr=(char *)b;
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: static int mem_free(BIO *a)
sl@0: 	{
sl@0: 	if (a == NULL) return(0);
sl@0: 	if (a->shutdown)
sl@0: 		{
sl@0: 		if ((a->init) && (a->ptr != NULL))
sl@0: 			{
sl@0: 			BUF_MEM *b;
sl@0: 			b = (BUF_MEM *)a->ptr;
sl@0: 			if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL;
sl@0: 			BUF_MEM_free(b);
sl@0: 			a->ptr=NULL;
sl@0: 			}
sl@0: 		}
sl@0: 	return(1);
sl@0: 	}
sl@0: 	
sl@0: static int mem_read(BIO *b, char *out, int outl)
sl@0: 	{
sl@0: 	int ret= -1;
sl@0: 	BUF_MEM *bm;
sl@0: 	int i;
sl@0: 	char *from,*to;
sl@0: 
sl@0: 	bm=(BUF_MEM *)b->ptr;
sl@0: 	BIO_clear_retry_flags(b);
sl@0: 	ret=(outl > bm->length)?bm->length:outl;
sl@0: 	if ((out != NULL) && (ret > 0)) {
sl@0: 		memcpy(out,bm->data,ret);
sl@0: 		bm->length-=ret;
sl@0: 		/* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
sl@0: 		if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret;
sl@0: 		else {
sl@0: 			from=(char *)&(bm->data[ret]);
sl@0: 			to=(char *)&(bm->data[0]);
sl@0: 			for (i=0; i<bm->length; i++)
sl@0: 				to[i]=from[i];
sl@0: 		}
sl@0: 	} else if (bm->length == 0)
sl@0: 		{
sl@0: 		ret = b->num;
sl@0: 		if (ret != 0)
sl@0: 			BIO_set_retry_read(b);
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int mem_write(BIO *b, const char *in, int inl)
sl@0: 	{
sl@0: 	int ret= -1;
sl@0: 	int blen;
sl@0: 	BUF_MEM *bm;
sl@0: 
sl@0: 	bm=(BUF_MEM *)b->ptr;
sl@0: 	if (in == NULL)
sl@0: 		{
sl@0: 		BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
sl@0: 		goto end;
sl@0: 		}
sl@0: 
sl@0: 	if(b->flags & BIO_FLAGS_MEM_RDONLY) {
sl@0: 		BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO);
sl@0: 		goto end;
sl@0: 	}
sl@0: 
sl@0: 	BIO_clear_retry_flags(b);
sl@0: 	blen=bm->length;
sl@0: 	if (BUF_MEM_grow_clean(bm,blen+inl) != (blen+inl))
sl@0: 		goto end;
sl@0: 	memcpy(&(bm->data[blen]),in,inl);
sl@0: 	ret=inl;
sl@0: end:
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
sl@0: 	{
sl@0: 	long ret=1;
sl@0: 	char **pptr;
sl@0: 
sl@0: 	BUF_MEM *bm=(BUF_MEM *)b->ptr;
sl@0: 
sl@0: 	switch (cmd)
sl@0: 		{
sl@0: 	case BIO_CTRL_RESET:
sl@0: 		if (bm->data != NULL)
sl@0: 			{
sl@0: 			/* For read only case reset to the start again */
sl@0: 			if(b->flags & BIO_FLAGS_MEM_RDONLY) 
sl@0: 				{
sl@0: 				bm->data -= bm->max - bm->length;
sl@0: 				bm->length = bm->max;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				memset(bm->data,0,bm->max);
sl@0: 				bm->length=0;
sl@0: 				}
sl@0: 			}
sl@0: 		break;
sl@0: 	case BIO_CTRL_EOF:
sl@0: 		ret=(long)(bm->length == 0);
sl@0: 		break;
sl@0: 	case BIO_C_SET_BUF_MEM_EOF_RETURN:
sl@0: 		b->num=(int)num;
sl@0: 		break;
sl@0: 	case BIO_CTRL_INFO:
sl@0: 		ret=(long)bm->length;
sl@0: 		if (ptr != NULL)
sl@0: 			{
sl@0: 			pptr=(char **)ptr;
sl@0: 			*pptr=(char *)&(bm->data[0]);
sl@0: 			}
sl@0: 		break;
sl@0: 	case BIO_C_SET_BUF_MEM:
sl@0: 		mem_free(b);
sl@0: 		b->shutdown=(int)num;
sl@0: 		b->ptr=ptr;
sl@0: 		break;
sl@0: 	case BIO_C_GET_BUF_MEM_PTR:
sl@0: 		if (ptr != NULL)
sl@0: 			{
sl@0: 			pptr=(char **)ptr;
sl@0: 			*pptr=(char *)bm;
sl@0: 			}
sl@0: 		break;
sl@0: 	case BIO_CTRL_GET_CLOSE:
sl@0: 		ret=(long)b->shutdown;
sl@0: 		break;
sl@0: 	case BIO_CTRL_SET_CLOSE:
sl@0: 		b->shutdown=(int)num;
sl@0: 		break;
sl@0: 
sl@0: 	case BIO_CTRL_WPENDING:
sl@0: 		ret=0L;
sl@0: 		break;
sl@0: 	case BIO_CTRL_PENDING:
sl@0: 		ret=(long)bm->length;
sl@0: 		break;
sl@0: 	case BIO_CTRL_DUP:
sl@0: 	case BIO_CTRL_FLUSH:
sl@0: 		ret=1;
sl@0: 		break;
sl@0: 	case BIO_CTRL_PUSH:
sl@0: 	case BIO_CTRL_POP:
sl@0: 	default:
sl@0: 		ret=0;
sl@0: 		break;
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int mem_gets(BIO *bp, char *buf, int size)
sl@0: 	{
sl@0: 	int i,j;
sl@0: 	int ret= -1;
sl@0: 	char *p;
sl@0: 	BUF_MEM *bm=(BUF_MEM *)bp->ptr;
sl@0: 
sl@0: 	BIO_clear_retry_flags(bp);
sl@0: 	j=bm->length;
sl@0: 	if (j <= 0)
sl@0: 		{
sl@0: 		*buf='\0';
sl@0: 		return 0;
sl@0: 		}
sl@0: 	p=bm->data;
sl@0: 	for (i=0; i<j; i++)
sl@0: 		{
sl@0: 		if (p[i] == '\n') break;
sl@0: 		}
sl@0: 	if (i == j)
sl@0: 		{
sl@0: 		BIO_set_retry_read(bp);
sl@0: 		/* return(-1);  change the semantics 0.6.6a */ 
sl@0: 		}
sl@0: 	else
sl@0: 		i++;
sl@0: 	/* i is the max to copy */
sl@0: 	if ((size-1) < i) i=size-1;
sl@0: 	i=mem_read(bp,buf,i);
sl@0: 	if (i > 0) buf[i]='\0';
sl@0: 	ret=i;
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int mem_puts(BIO *bp, const char *str)
sl@0: 	{
sl@0: 	int n,ret;
sl@0: 
sl@0: 	n=strlen(str);
sl@0: 	ret=mem_write(bp,str,n);
sl@0: 	/* memory semantics is that it will always work */
sl@0: 	return(ret);
sl@0: 	}
sl@0: