[thirdparty/openssl.git] / crypto / asn1 / a_d2i_fp.c

/* crypto/asn1/a_d2i_fp.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 <limits.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/asn1_mac.h>

static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb);

#ifndef NO_OLD_ASN1
#ifndef OPENSSL_NO_FP_API

void *ASN1_d2i_fp(void *(*xnew)(void), d2i_of_void *d2i, FILE *in, void **x)
        {
        BIO *b;
        void *ret;

        if ((b=BIO_new(BIO_s_file())) == NULL)
		{
		ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
                return(NULL);
		}
        BIO_set_fp(b,in,BIO_NOCLOSE);
        ret=ASN1_d2i_bio(xnew,d2i,b,x);
        BIO_free(b);
        return(ret);
        }
#endif

void *ASN1_d2i_bio(void *(*xnew)(void), d2i_of_void *d2i, BIO *in, void **x)
	{
	BUF_MEM *b = NULL;
	const unsigned char *p;
	void *ret=NULL;
	int len;

	len = asn1_d2i_read_bio(in, &b);
	if(len < 0) goto err;

	p=(unsigned char *)b->data;
	ret=d2i(x,&p,len);
err:
	if (b != NULL) BUF_MEM_free(b);
	return(ret);
	}

#endif

void *ASN1_item_d2i_bio(const ASN1_ITEM *it, BIO *in, void *x)
	{
	BUF_MEM *b = NULL;
	const unsigned char *p;
	void *ret=NULL;
	int len;

	len = asn1_d2i_read_bio(in, &b);
	if(len < 0) goto err;

	p=(const unsigned char *)b->data;
	ret=ASN1_item_d2i(x,&p,len, it);
err:
	if (b != NULL) BUF_MEM_free(b);
	return(ret);
	}

#ifndef OPENSSL_NO_FP_API
void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x)
        {
        BIO *b;
        char *ret;

        if ((b=BIO_new(BIO_s_file())) == NULL)
		{
		ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB);
                return(NULL);
		}
        BIO_set_fp(b,in,BIO_NOCLOSE);
        ret=ASN1_item_d2i_bio(it,b,x);
        BIO_free(b);
        return(ret);
        }
#endif

#define HEADER_SIZE   8
static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb)
	{
	BUF_MEM *b;
	unsigned char *p;
	int i;
	ASN1_const_CTX c;
	size_t want=HEADER_SIZE;
	int eos=0;
	size_t off=0;
	size_t len=0;

	b=BUF_MEM_new();
	if (b == NULL)
		{
		ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
		return -1;
		}

	ERR_clear_error();
	for (;;)
		{
		if (want >= (len-off))
			{
			want-=(len-off);

			if (len + want < len || !BUF_MEM_grow_clean(b,len+want))
				{
				ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
				goto err;
				}
			i=BIO_read(in,&(b->data[len]),want);
			if ((i < 0) && ((len-off) == 0))
				{
				ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOUGH_DATA);
				goto err;
				}
			if (i > 0)
				{
				if (len+i < len)
					{
					ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
					goto err;
					}
				len+=i;
				}
			}
		/* else data already loaded */

		p=(unsigned char *)&(b->data[off]);
		c.p=p;
		c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass),
			len-off);
		if (c.inf & 0x80)
			{
			unsigned long e;

			e=ERR_GET_REASON(ERR_peek_error());
			if (e != ASN1_R_TOO_LONG)
				goto err;
			else
				ERR_clear_error(); /* clear error */
			}
		i=c.p-p;/* header length */
		off+=i;	/* end of data */

		if (c.inf & 1)
			{
			/* no data body so go round again */
			eos++;
			if (eos < 0)
				{
				ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_TOO_LONG);
				goto err;
				}
			want=HEADER_SIZE;
			}
		else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
			{
			/* eos value, so go back and read another header */
			eos--;
			if (eos <= 0)
				break;
			else
				want=HEADER_SIZE;
			}
		else 
			{
			/* suck in c.slen bytes of data */
			want=c.slen;
			if (want > (len-off))
				{
				want-=(len-off);
				if (want > INT_MAX /* BIO_read takes an int length */ ||
					len+want < len)
						{
						ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
						goto err;
						}
				if (!BUF_MEM_grow_clean(b,len+want))
					{
					ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
					goto err;
					}
				while (want > 0)
					{
					i=BIO_read(in,&(b->data[len]),want);
					if (i <= 0)
						{
						ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
						    ASN1_R_NOT_ENOUGH_DATA);
						goto err;
						}
					/* This can't overflow because
					 * |len+want| didn't overflow. */
					len+=i;
					want-=i;
					}
				}
			if (off + c.slen < off)
				{
				ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
				goto err;
				}
			off+=c.slen;
			if (eos <= 0)
				{
				break;
				}
			else
				want=HEADER_SIZE;
			}
		}

	if (off > INT_MAX)
		{
		ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
		goto err;
		}

	*pb = b;
	return off;
err:
	if (b != NULL) BUF_MEM_free(b);
	return -1;
	}
Commit	Line	Data
d02b48c6	1	/* crypto/asn1/a_d2i_fp.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>
d9a9d10f	60	#include <limits.h>
d02b48c6	61	#include "cryptlib.h"
ec577822 BM	62	#include <openssl/buffer.h>
ec577822 BM	63	#include <openssl/asn1_mac.h>
d02b48c6	64
4e1209eb	65	static int asn1_d2i_read_bio(BIO in, BUF_MEM *pb);
d02b48c6	66
4e1209eb	67	#ifndef NO_OLD_ASN1
cf1b7d96	68	#ifndef OPENSSL_NO_FP_API
4e1209eb	69
45d10efc	70	void ASN1_d2i_fp(void (xnew)(void), d2i_of_void d2i, FILE in, void *x)
d02b48c6 RE	71	{
d02b48c6 RE	72	BIO *b;
41a15c4f	73	void *ret;
d02b48c6 RE	74
	75	if ((b=BIO_new(BIO_s_file())) == NULL)
	76	{
	77	ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB);
	78	return(NULL);
	79	}
	80	BIO_set_fp(b,in,BIO_NOCLOSE);
	81	ret=ASN1_d2i_bio(xnew,d2i,b,x);
	82	BIO_free(b);
	83	return(ret);
	84	}
	85	#endif
	86
45d10efc	87	void ASN1_d2i_bio(void (xnew)(void), d2i_of_void d2i, BIO in, void *x)
d02b48c6	88	{
4e1209eb	89	BUF_MEM *b = NULL;
41a15c4f BL	90	const unsigned char *p;
41a15c4f BL	91	void *ret=NULL;
4e1209eb DSH	92	int len;
	93
	94	len = asn1_d2i_read_bio(in, &b);
	95	if(len < 0) goto err;
	96
22c3600e	97	p=(unsigned char *)b->data;
4e1209eb DSH	98	ret=d2i(x,&p,len);
	99	err:
	100	if (b != NULL) BUF_MEM_free(b);
	101	return(ret);
	102	}
	103
	104	#endif
	105
	106	void ASN1_item_d2i_bio(const ASN1_ITEM it, BIO in, void x)
	107	{
	108	BUF_MEM *b = NULL;
875a644a	109	const unsigned char *p;
4e1209eb DSH	110	void *ret=NULL;
	111	int len;
	112
	113	len = asn1_d2i_read_bio(in, &b);
	114	if(len < 0) goto err;
	115
875a644a	116	p=(const unsigned char *)b->data;
4e1209eb DSH	117	ret=ASN1_item_d2i(x,&p,len, it);
	118	err:
	119	if (b != NULL) BUF_MEM_free(b);
	120	return(ret);
	121	}
	122
cf1b7d96	123	#ifndef OPENSSL_NO_FP_API
4e1209eb DSH	124	void ASN1_item_d2i_fp(const ASN1_ITEM it, FILE in, void x)
	125	{
	126	BIO *b;
	127	char *ret;
	128
	129	if ((b=BIO_new(BIO_s_file())) == NULL)
	130	{
fbeaa3c4	131	ASN1err(ASN1_F_ASN1_ITEM_D2I_FP,ERR_R_BUF_LIB);
4e1209eb DSH	132	return(NULL);
	133	}
	134	BIO_set_fp(b,in,BIO_NOCLOSE);
	135	ret=ASN1_item_d2i_bio(it,b,x);
	136	BIO_free(b);
	137	return(ret);
	138	}
	139	#endif
	140
	141	#define HEADER_SIZE 8
	142	static int asn1_d2i_read_bio(BIO in, BUF_MEM *pb)
	143	{
d02b48c6 RE	144	BUF_MEM *b;
	145	unsigned char *p;
	146	int i;
875a644a	147	ASN1_const_CTX c;
d9a9d10f	148	size_t want=HEADER_SIZE;
d02b48c6	149	int eos=0;
d9a9d10f DSH	150	size_t off=0;
d9a9d10f DSH	151	size_t len=0;
d02b48c6 RE	152
	153	b=BUF_MEM_new();
	154	if (b == NULL)
	155	{
fbeaa3c4	156	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
4e1209eb	157	return -1;
d02b48c6 RE	158	}
d02b48c6 RE	159
58964a49	160	ERR_clear_error();
d02b48c6 RE	161	for (;;)
	162	{
	163	if (want >= (len-off))
	164	{
	165	want-=(len-off);
	166
d9a9d10f	167	if (len + want < len \|\| !BUF_MEM_grow_clean(b,len+want))
d02b48c6	168	{
fbeaa3c4	169	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
d02b48c6 RE	170	goto err;
	171	}
	172	i=BIO_read(in,&(b->data[len]),want);
	173	if ((i < 0) && ((len-off) == 0))
	174	{
fbeaa3c4	175	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_NOT_ENOUGH_DATA);
d02b48c6 RE	176	goto err;
	177	}
	178	if (i > 0)
d9a9d10f DSH	179	{
	180	if (len+i < len)
	181	{
	182	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
	183	goto err;
	184	}
d02b48c6	185	len+=i;
d9a9d10f	186	}
d02b48c6 RE	187	}
	188	/* else data already loaded */
	189
	190	p=(unsigned char *)&(b->data[off]);
	191	c.p=p;
	192	c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass),
	193	len-off);
	194	if (c.inf & 0x80)
	195	{
	196	unsigned long e;
	197
	198	e=ERR_GET_REASON(ERR_peek_error());
	199	if (e != ASN1_R_TOO_LONG)
	200	goto err;
	201	else
f763e0b5	202	ERR_clear_error(); /* clear error */
d02b48c6 RE	203	}
	204	i=c.p-p;/* header length */
	205	off+=i; /* end of data */
	206
	207	if (c.inf & 1)
	208	{
	209	/* no data body so go round again */
	210	eos++;
d9a9d10f DSH	211	if (eos < 0)
	212	{
	213	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_HEADER_TOO_LONG);
	214	goto err;
	215	}
d02b48c6 RE	216	want=HEADER_SIZE;
	217	}
	218	else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC))
	219	{
	220	/* eos value, so go back and read another header */
	221	eos--;
	222	if (eos <= 0)
	223	break;
	224	else
	225	want=HEADER_SIZE;
	226	}
	227	else
	228	{
	229	/* suck in c.slen bytes of data */
d9a9d10f	230	want=c.slen;
d02b48c6 RE	231	if (want > (len-off))
	232	{
	233	want-=(len-off);
d9a9d10f DSH	234	if (want > INT_MAX /* BIO_read takes an int length */ \|\|
	235	len+want < len)
	236	{
	237	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
	238	goto err;
	239	}
54a656ef	240	if (!BUF_MEM_grow_clean(b,len+want))
d02b48c6	241	{
fbeaa3c4	242	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ERR_R_MALLOC_FAILURE);
d02b48c6 RE	243	goto err;
d02b48c6 RE	244	}
2053c43d	245	while (want > 0)
d02b48c6	246	{
2053c43d DSH	247	i=BIO_read(in,&(b->data[len]),want);
	248	if (i <= 0)
	249	{
fbeaa3c4	250	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,
2053c43d DSH	251	ASN1_R_NOT_ENOUGH_DATA);
	252	goto err;
	253	}
d9a9d10f DSH	254	/* This can't overflow because
d9a9d10f DSH	255	* \|len+want\| didn't overflow. */
2053c43d	256	len+=i;
d9a9d10f	257	want-=i;
d02b48c6	258	}
d02b48c6	259	}
d9a9d10f DSH	260	if (off + c.slen < off)
	261	{
	262	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
	263	goto err;
	264	}
	265	off+=c.slen;
d02b48c6 RE	266	if (eos <= 0)
	267	{
	268	break;
	269	}
	270	else
	271	want=HEADER_SIZE;
	272	}
	273	}
	274
d9a9d10f DSH	275	if (off > INT_MAX)
	276	{
	277	ASN1err(ASN1_F_ASN1_D2I_READ_BIO,ASN1_R_TOO_LONG);
	278	goto err;
	279	}
	280
4e1209eb DSH	281	*pb = b;
4e1209eb DSH	282	return off;
d02b48c6 RE	283	err:
d02b48c6 RE	284	if (b != NULL) BUF_MEM_free(b);
d9a9d10f	285	return -1;
d02b48c6	286	}