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

/* crypto/bio/bss_mem.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 mem_write(BIO *h,char *buf,int num);
static int mem_read(BIO *h,char *buf,int size);
static int mem_puts(BIO *h,char *str);
static int mem_gets(BIO *h,char *str,int size);
static long mem_ctrl(BIO *h,int cmd,long arg1,char *arg2);
static int mem_new(BIO *h);
static int mem_free(BIO *data);
static BIO_METHOD mem_method=
	{
	BIO_TYPE_MEM,
	"memory buffer",
	mem_write,
	mem_read,
	mem_puts,
	mem_gets,
	mem_ctrl,
	mem_new,
	mem_free,
	};

/* bio->num is used to hold the value to return on 'empty', if it is
 * 0, should_retry is not set */

BIO_METHOD *BIO_s_mem(void)
	{
	return(&mem_method);
	}

BIO *BIO_new_mem_buf(void *buf, int len)
{
	BIO *ret;
	BUF_MEM *b;
	if (!buf) {
		BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER);
		return NULL;
	}
	if(len == -1) len = strlen(buf);
	if(!(ret = BIO_new(BIO_s_mem())) ) return NULL;
	b = (BUF_MEM *)ret->ptr;
	b->data = buf;
	b->length = len;
	b->max = len;
	ret->flags |= BIO_FLAGS_MEM_RDONLY;
	/* Since this is static data retrying wont help */
	ret->num = 0;
	return ret;
}

static int mem_new(BIO *bi)
	{
	BUF_MEM *b;

	if ((b=BUF_MEM_new()) == NULL)
		return(0);
	bi->shutdown=1;
	bi->init=1;
	bi->num= -1;
	bi->ptr=(char *)b;
	return(1);
	}

static int mem_free(BIO *a)
	{
	if (a == NULL) return(0);
	if (a->shutdown)
		{
		if ((a->init) && (a->ptr != NULL))
			{
			BUF_MEM *b;
			b = (BUF_MEM *)a->ptr;
			if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL;
			BUF_MEM_free(b);
			a->ptr=NULL;
			}
		}
	return(1);
	}
	
static int mem_read(BIO *b, char *out, int outl)
	{
	int ret= -1;
	BUF_MEM *bm;
	int i;
	char *from,*to;

	bm=(BUF_MEM *)b->ptr;
	BIO_clear_retry_flags(b);
	ret=(outl > bm->length)?bm->length:outl;
	if ((out != NULL) && (ret > 0)) {
		memcpy(out,bm->data,ret);
		bm->length-=ret;
		/* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
		if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret;
		else {
			from=(char *)&(bm->data[ret]);
			to=(char *)&(bm->data[0]);
			for (i=0; i<bm->length; i++)
				to[i]=from[i];
		}
	} else if (bm->length == 0)
		{
		if (b->num != 0)
			BIO_set_retry_read(b);
		ret= b->num;
		}
	return(ret);
	}

static int mem_write(BIO *b, char *in, int inl)
	{
	int ret= -1;
	int blen;
	BUF_MEM *bm;

	bm=(BUF_MEM *)b->ptr;
	if (in == NULL)
		{
		BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
		goto end;
		}

	if(b->flags & BIO_FLAGS_MEM_RDONLY) {
		BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO);
		goto end;
	}

	BIO_clear_retry_flags(b);
	blen=bm->length;
	if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
		goto end;
	memcpy(&(bm->data[blen]),in,inl);
	ret=inl;
end:
	return(ret);
	}

static long mem_ctrl(BIO *b, int cmd, long num, char *ptr)
	{
	long ret=1;
	char **pptr;

	BUF_MEM *bm=(BUF_MEM *)b->ptr;

	switch (cmd)
		{
	case BIO_CTRL_RESET:
		if (bm->data != NULL) {
			/* For read only case reset to the start again */
			if(b->flags & BIO_FLAGS_MEM_RDONLY) 
					bm->data -= bm->max - bm->length;
			else {
				memset(bm->data,0,bm->max);
				bm->length=0;
			}
		}
		break;
	case BIO_CTRL_EOF:
		ret=(long)(bm->length == 0);
		break;
	case BIO_C_SET_BUF_MEM_EOF_RETURN:
		b->num=(int)num;
		break;
	case BIO_CTRL_INFO:
		ret=(long)bm->length;
		if (ptr != NULL)
			{
			pptr=(char **)ptr;
			*pptr=(char *)&(bm->data[0]);
			}
		break;
	case BIO_C_SET_BUF_MEM:
		mem_free(b);
		b->shutdown=(int)num;
		b->ptr=ptr;
		break;
	case BIO_C_GET_BUF_MEM_PTR:
		if (ptr != NULL)
			{
			pptr=(char **)ptr;
			*pptr=(char *)bm;
			}
		break;
	case BIO_CTRL_GET_CLOSE:
		ret=(long)b->shutdown;
		break;
	case BIO_CTRL_SET_CLOSE:
		b->shutdown=(int)num;
		break;

	case BIO_CTRL_WPENDING:
		ret=0L;
		break;
	case BIO_CTRL_PENDING:
		ret=(long)bm->length;
		break;
	case BIO_CTRL_DUP:
	case BIO_CTRL_FLUSH:
		ret=1;
		break;
	case BIO_CTRL_PUSH:
	case BIO_CTRL_POP:
	default:
		ret=0;
		break;
		}
	return(ret);
	}

static int mem_gets(BIO *bp, char *buf, int size)
	{
	int i,j;
	int ret= -1;
	char *p;
	BUF_MEM *bm=(BUF_MEM *)bp->ptr;

	BIO_clear_retry_flags(bp);
	j=bm->length;
	if (j <= 0) return(0);
	p=bm->data;
	for (i=0; i<j; i++)
		{
		if (p[i] == '\n') break;
		}
	if (i == j)
		{
		BIO_set_retry_read(bp);
		/* return(-1);  change the semantics 0.6.6a */ 
		}
	else
		i++;
	/* i is the max to copy */
	if ((size-1) < i) i=size-1;
	i=mem_read(bp,buf,i);
	if (i > 0) buf[i]='\0';
	ret=i;
	return(ret);
	}

static int mem_puts(BIO *bp, char *str)
	{
	int n,ret;

	n=strlen(str);
	ret=mem_write(bp,str,n);
	/* memory semantics is that it will always work */
	return(ret);
	}
Commit	Line	Data
d02b48c6	1	/* crypto/bio/bss_mem.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	62	#include <openssl/bio.h>
d02b48c6	63
d02b48c6 RE	64	static int mem_write(BIO h,char buf,int num);
	65	static int mem_read(BIO h,char buf,int size);
	66	static int mem_puts(BIO h,char str);
	67	static int mem_gets(BIO h,char str,int size);
	68	static long mem_ctrl(BIO h,int cmd,long arg1,char arg2);
	69	static int mem_new(BIO *h);
	70	static int mem_free(BIO *data);
d02b48c6 RE	71	static BIO_METHOD mem_method=
d02b48c6 RE	72	{
58964a49 RE	73	BIO_TYPE_MEM,
58964a49 RE	74	"memory buffer",
d02b48c6 RE	75	mem_write,
	76	mem_read,
	77	mem_puts,
	78	mem_gets,
	79	mem_ctrl,
	80	mem_new,
	81	mem_free,
	82	};
	83
dfeab068 RE	84	/* bio->num is used to hold the value to return on 'empty', if it is
	85	* 0, should_retry is not set */
	86
6b691a5c	87	BIO_METHOD *BIO_s_mem(void)
d02b48c6 RE	88	{
	89	return(&mem_method);
	90	}
	91
8484721a DSH	92	BIO BIO_new_mem_buf(void buf, int len)
	93	{
	94	BIO *ret;
	95	BUF_MEM *b;
	96	if (!buf) {
	97	BIOerr(BIO_F_BIO_NEW_MEM_BUF,BIO_R_NULL_PARAMETER);
	98	return NULL;
	99	}
	100	if(len == -1) len = strlen(buf);
	101	if(!(ret = BIO_new(BIO_s_mem())) ) return NULL;
	102	b = (BUF_MEM *)ret->ptr;
	103	b->data = buf;
	104	b->length = len;
	105	b->max = len;
	106	ret->flags \|= BIO_FLAGS_MEM_RDONLY;
	107	/* Since this is static data retrying wont help */
	108	ret->num = 0;
	109	return ret;
	110	}
	111
6b691a5c	112	static int mem_new(BIO *bi)
d02b48c6 RE	113	{
	114	BUF_MEM *b;
	115
	116	if ((b=BUF_MEM_new()) == NULL)
	117	return(0);
	118	bi->shutdown=1;
	119	bi->init=1;
dfeab068	120	bi->num= -1;
d02b48c6 RE	121	bi->ptr=(char *)b;
	122	return(1);
	123	}
	124
6b691a5c	125	static int mem_free(BIO *a)
d02b48c6 RE	126	{
	127	if (a == NULL) return(0);
	128	if (a->shutdown)
	129	{
	130	if ((a->init) && (a->ptr != NULL))
	131	{
8484721a DSH	132	BUF_MEM *b;
	133	b = (BUF_MEM *)a->ptr;
	134	if(a->flags & BIO_FLAGS_MEM_RDONLY) b->data = NULL;
	135	BUF_MEM_free(b);
d02b48c6 RE	136	a->ptr=NULL;
	137	}
	138	}
	139	return(1);
	140	}
	141
6b691a5c	142	static int mem_read(BIO b, char out, int outl)
d02b48c6 RE	143	{
	144	int ret= -1;
	145	BUF_MEM *bm;
	146	int i;
	147	char from,to;
	148
	149	bm=(BUF_MEM *)b->ptr;
	150	BIO_clear_retry_flags(b);
	151	ret=(outl > bm->length)?bm->length:outl;
8484721a	152	if ((out != NULL) && (ret > 0)) {
d02b48c6 RE	153	memcpy(out,bm->data,ret);
	154	bm->length-=ret;
	155	/* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
8484721a DSH	156	if(b->flags & BIO_FLAGS_MEM_RDONLY) bm->data += ret;
	157	else {
	158	from=(char *)&(bm->data[ret]);
	159	to=(char *)&(bm->data[0]);
	160	for (i=0; i<bm->length; i++)
	161	to[i]=from[i];
d02b48c6	162	}
8484721a	163	} else if (bm->length == 0)
d02b48c6	164	{
dfeab068 RE	165	if (b->num != 0)
	166	BIO_set_retry_read(b);
	167	ret= b->num;
d02b48c6 RE	168	}
	169	return(ret);
	170	}
	171
6b691a5c	172	static int mem_write(BIO b, char in, int inl)
d02b48c6 RE	173	{
	174	int ret= -1;
	175	int blen;
	176	BUF_MEM *bm;
	177
	178	bm=(BUF_MEM *)b->ptr;
	179	if (in == NULL)
	180	{
	181	BIOerr(BIO_F_MEM_WRITE,BIO_R_NULL_PARAMETER);
	182	goto end;
	183	}
	184
8484721a DSH	185	if(b->flags & BIO_FLAGS_MEM_RDONLY) {
	186	BIOerr(BIO_F_MEM_WRITE,BIO_R_WRITE_TO_READ_ONLY_BIO);
	187	goto end;
	188	}
	189
d02b48c6 RE	190	BIO_clear_retry_flags(b);
	191	blen=bm->length;
	192	if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
	193	goto end;
	194	memcpy(&(bm->data[blen]),in,inl);
	195	ret=inl;
	196	end:
	197	return(ret);
	198	}
	199
6b691a5c	200	static long mem_ctrl(BIO b, int cmd, long num, char ptr)
d02b48c6 RE	201	{
	202	long ret=1;
	203	char **pptr;
	204
	205	BUF_MEM bm=(BUF_MEM )b->ptr;
	206
	207	switch (cmd)
	208	{
	209	case BIO_CTRL_RESET:
8484721a DSH	210	if (bm->data != NULL) {
	211	/* For read only case reset to the start again */
	212	if(b->flags & BIO_FLAGS_MEM_RDONLY)
	213	bm->data -= bm->max - bm->length;
	214	else {
	215	memset(bm->data,0,bm->max);
	216	bm->length=0;
	217	}
	218	}
d02b48c6 RE	219	break;
	220	case BIO_CTRL_EOF:
	221	ret=(long)(bm->length == 0);
	222	break;
dfeab068 RE	223	case BIO_C_SET_BUF_MEM_EOF_RETURN:
	224	b->num=(int)num;
	225	break;
d02b48c6 RE	226	case BIO_CTRL_INFO:
	227	ret=(long)bm->length;
	228	if (ptr != NULL)
	229	{
	230	pptr=(char **)ptr;
	231	pptr=(char )&(bm->data[0]);
	232	}
	233	break;
	234	case BIO_C_SET_BUF_MEM:
	235	mem_free(b);
	236	b->shutdown=(int)num;
	237	b->ptr=ptr;
	238	break;
	239	case BIO_C_GET_BUF_MEM_PTR:
	240	if (ptr != NULL)
	241	{
	242	pptr=(char **)ptr;
	243	pptr=(char )bm;
	244	}
	245	break;
	246	case BIO_CTRL_GET_CLOSE:
	247	ret=(long)b->shutdown;
	248	break;
	249	case BIO_CTRL_SET_CLOSE:
	250	b->shutdown=(int)num;
	251	break;
	252
	253	case BIO_CTRL_WPENDING:
	254	ret=0L;
	255	break;
	256	case BIO_CTRL_PENDING:
	257	ret=(long)bm->length;
	258	break;
	259	case BIO_CTRL_DUP:
	260	case BIO_CTRL_FLUSH:
	261	ret=1;
	262	break;
	263	case BIO_CTRL_PUSH:
	264	case BIO_CTRL_POP:
	265	default:
	266	ret=0;
	267	break;
	268	}
	269	return(ret);
	270	}
	271
6b691a5c	272	static int mem_gets(BIO bp, char buf, int size)
d02b48c6 RE	273	{
	274	int i,j;
	275	int ret= -1;
	276	char *p;
	277	BUF_MEM bm=(BUF_MEM )bp->ptr;
	278
	279	BIO_clear_retry_flags(bp);
	280	j=bm->length;
	281	if (j <= 0) return(0);
	282	p=bm->data;
	283	for (i=0; i<j; i++)
	284	{
	285	if (p[i] == '\n') break;
	286	}
	287	if (i == j)
	288	{
	289	BIO_set_retry_read(bp);
	290	/* return(-1); change the semantics 0.6.6a */
	291	}
	292	else
	293	i++;
	294	/* i is the max to copy */
	295	if ((size-1) < i) i=size-1;
	296	i=mem_read(bp,buf,i);
	297	if (i > 0) buf[i]='\0';
	298	ret=i;
	299	return(ret);
	300	}
	301
6b691a5c	302	static int mem_puts(BIO bp, char str)
d02b48c6 RE	303	{
	304	int n,ret;
	305
	306	n=strlen(str);
	307	ret=mem_write(bp,str,n);
	308	/* memory semantics is that it will always work */
	309	return(ret);
	310	}
	311