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

/* crypto/asn1/a_bytes.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 "cryptlib.h"
#include <openssl/asn1.h>

static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c);
/* type is a 'bitmap' of acceptable string types.
 */
ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, unsigned char **pp,
	     long length, int type)
	{
	ASN1_STRING *ret=NULL;
	unsigned char *p,*s;
	long len;
	int inf,tag,xclass;
	int i=0;

	p= *pp;
	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
	if (inf & 0x80) goto err;

	if (tag >= 32)
		{
		i=ASN1_R_TAG_VALUE_TOO_HIGH;;
		goto err;
		}
	if (!(ASN1_tag2bit(tag) & type))
		{
		i=ASN1_R_WRONG_TYPE;
		goto err;
		}

	/* If a bit-string, exit early */
	if (tag == V_ASN1_BIT_STRING)
		return(d2i_ASN1_BIT_STRING(a,pp,length));

	if ((a == NULL) || ((*a) == NULL))
		{
		if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
		}
	else
		ret=(*a);

	if (len != 0)
		{
		s=(unsigned char *)OPENSSL_malloc((int)len+1);
		if (s == NULL)
			{
			i=ERR_R_MALLOC_FAILURE;
			goto err;
			}
		memcpy(s,p,(int)len);
		s[len]='\0';
		p+=len;
		}
	else
		s=NULL;

	if (ret->data != NULL) OPENSSL_free(ret->data);
	ret->length=(int)len;
	ret->data=s;
	ret->type=tag;
	if (a != NULL) (*a)=ret;
	*pp=p;
	return(ret);
err:
	ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i);
	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
		ASN1_STRING_free(ret);
	return(NULL);
	}

int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass)
	{
	int ret,r,constructed;
	unsigned char *p;

	if (a == NULL)  return(0);

	if (tag == V_ASN1_BIT_STRING)
		return(i2d_ASN1_BIT_STRING(a,pp));
		
	ret=a->length;
	r=ASN1_object_size(0,ret,tag);
	if (pp == NULL) return(r);
	p= *pp;

	if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET))
		constructed=1;
	else
		constructed=0;
	ASN1_put_object(&p,constructed,ret,tag,xclass);
	memcpy(p,a->data,a->length);
	p+=a->length;
	*pp= p;
	return(r);
	}

ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, unsigned char **pp, long length,
	     int Ptag, int Pclass)
	{
	ASN1_STRING *ret=NULL;
	unsigned char *p,*s;
	long len;
	int inf,tag,xclass;
	int i=0;

	if ((a == NULL) || ((*a) == NULL))
		{
		if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
		}
	else
		ret=(*a);

	p= *pp;
	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
	if (inf & 0x80)
		{
		i=ASN1_R_BAD_OBJECT_HEADER;
		goto err;
		}

	if (tag != Ptag)
		{
		i=ASN1_R_WRONG_TAG;
		goto err;
		}

	if (inf & V_ASN1_CONSTRUCTED)
		{
		ASN1_CTX c;

		c.pp=pp;
		c.p=p;
		c.inf=inf;
		c.slen=len;
		c.tag=Ptag;
		c.xclass=Pclass;
		c.max=(length == 0)?0:(p+length);
		if (!asn1_collate_primitive(ret,&c)) 
			goto err; 
		else
			{
			p=c.p;
			}
		}
	else
		{
		if (len != 0)
			{
			if ((ret->length < len) || (ret->data == NULL))
				{
				if (ret->data != NULL) OPENSSL_free(ret->data);
				s=(unsigned char *)OPENSSL_malloc((int)len + 1);
				if (s == NULL)
					{
					i=ERR_R_MALLOC_FAILURE;
					goto err;
					}
				}
			else
				s=ret->data;
			memcpy(s,p,(int)len);
			s[len] = '\0';
			p+=len;
			}
		else
			{
			s=NULL;
			if (ret->data != NULL) OPENSSL_free(ret->data);
			}

		ret->length=(int)len;
		ret->data=s;
		ret->type=Ptag;
		}

	if (a != NULL) (*a)=ret;
	*pp=p;
	return(ret);
err:
	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
		ASN1_STRING_free(ret);
	ASN1err(ASN1_F_D2I_ASN1_BYTES,i);
	return(NULL);
	}


/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse
 * them into the one structure that is then returned */
/* There have been a few bug fixes for this function from
 * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */
static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c)
	{
	ASN1_STRING *os=NULL;
	BUF_MEM b;
	int num;

	b.length=0;
	b.max=0;
	b.data=NULL;

	if (a == NULL)
		{
		c->error=ERR_R_PASSED_NULL_PARAMETER;
		goto err;
		}

	num=0;
	for (;;)
		{
		if (c->inf & 1)
			{
			c->eos=ASN1_check_infinite_end(&c->p,
				(long)(c->max-c->p));
			if (c->eos) break;
			}
		else
			{
			if (c->slen <= 0) break;
			}

		c->q=c->p;
		if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass)
			== NULL)
			{
			c->error=ERR_R_ASN1_LIB;
			goto err;
			}

		if (!BUF_MEM_grow_clean(&b,num+os->length))
			{
			c->error=ERR_R_BUF_LIB;
			goto err;
			}
		memcpy(&(b.data[num]),os->data,os->length);
		if (!(c->inf & 1))
			c->slen-=(c->p-c->q);
		num+=os->length;
		}

	if (!asn1_Finish(c)) goto err;

	a->length=num;
	if (a->data != NULL) OPENSSL_free(a->data);
	a->data=(unsigned char *)b.data;
	if (os != NULL) ASN1_STRING_free(os);
	return(1);
err:
	ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error);
	if (os != NULL) ASN1_STRING_free(os);
	if (b.data != NULL) OPENSSL_free(b.data);
	return(0);
	}
Commit	Line	Data
d02b48c6	1	/* crypto/asn1/a_bytes.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 "cryptlib.h"
9d6b1ce6	61	#include <openssl/asn1.h>
d02b48c6	62
657e60fa	63	static int asn1_collate_primitive(ASN1_STRING a, ASN1_CTX c);
d77b3054	64	/* type is a 'bitmap' of acceptable string types.
d02b48c6	65	*/
6b691a5c UM	66	ASN1_STRING d2i_ASN1_type_bytes(ASN1_STRING a, unsigned char *pp,
6b691a5c UM	67	long length, int type)
d02b48c6 RE	68	{
	69	ASN1_STRING *ret=NULL;
	70	unsigned char p,s;
	71	long len;
	72	int inf,tag,xclass;
	73	int i=0;
	74
d02b48c6 RE	75	p= *pp;
	76	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
	77	if (inf & 0x80) goto err;
	78
	79	if (tag >= 32)
	80	{
	81	i=ASN1_R_TAG_VALUE_TOO_HIGH;;
	82	goto err;
	83	}
1241126a	84	if (!(ASN1_tag2bit(tag) & type))
d02b48c6 RE	85	{
	86	i=ASN1_R_WRONG_TYPE;
	87	goto err;
	88	}
58964a49 RE	89
	90	/* If a bit-string, exit early */
	91	if (tag == V_ASN1_BIT_STRING)
	92	return(d2i_ASN1_BIT_STRING(a,pp,length));
	93
	94	if ((a == NULL) \|\| ((*a) == NULL))
	95	{
	96	if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
	97	}
	98	else
	99	ret=(*a);
	100
d02b48c6 RE	101	if (len != 0)
d02b48c6 RE	102	{
26a3a48d	103	s=(unsigned char *)OPENSSL_malloc((int)len+1);
d02b48c6 RE	104	if (s == NULL)
	105	{
	106	i=ERR_R_MALLOC_FAILURE;
	107	goto err;
	108	}
	109	memcpy(s,p,(int)len);
	110	s[len]='\0';
	111	p+=len;
	112	}
	113	else
	114	s=NULL;
	115
26a3a48d	116	if (ret->data != NULL) OPENSSL_free(ret->data);
d02b48c6 RE	117	ret->length=(int)len;
	118	ret->data=s;
	119	ret->type=tag;
	120	if (a != NULL) (*a)=ret;
	121	*pp=p;
	122	return(ret);
	123	err:
	124	ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i);
	125	if ((ret != NULL) && ((a == NULL) \|\| (*a != ret)))
	126	ASN1_STRING_free(ret);
	127	return(NULL);
	128	}
	129
6b691a5c	130	int i2d_ASN1_bytes(ASN1_STRING a, unsigned char *pp, int tag, int xclass)
d02b48c6 RE	131	{
	132	int ret,r,constructed;
	133	unsigned char *p;
	134
	135	if (a == NULL) return(0);
58964a49 RE	136
	137	if (tag == V_ASN1_BIT_STRING)
	138	return(i2d_ASN1_BIT_STRING(a,pp));
	139
d02b48c6 RE	140	ret=a->length;
	141	r=ASN1_object_size(0,ret,tag);
	142	if (pp == NULL) return(r);
	143	p= *pp;
	144
	145	if ((tag == V_ASN1_SEQUENCE) \|\| (tag == V_ASN1_SET))
	146	constructed=1;
	147	else
	148	constructed=0;
	149	ASN1_put_object(&p,constructed,ret,tag,xclass);
	150	memcpy(p,a->data,a->length);
	151	p+=a->length;
	152	*pp= p;
	153	return(r);
	154	}
	155
6b691a5c UM	156	ASN1_STRING d2i_ASN1_bytes(ASN1_STRING a, unsigned char *pp, long length,
6b691a5c UM	157	int Ptag, int Pclass)
d02b48c6 RE	158	{
	159	ASN1_STRING *ret=NULL;
	160	unsigned char p,s;
	161	long len;
	162	int inf,tag,xclass;
	163	int i=0;
	164
	165	if ((a == NULL) \|\| ((*a) == NULL))
	166	{
	167	if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
	168	}
	169	else
	170	ret=(*a);
	171
	172	p= *pp;
	173	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
	174	if (inf & 0x80)
	175	{
	176	i=ASN1_R_BAD_OBJECT_HEADER;
	177	goto err;
	178	}
	179
	180	if (tag != Ptag)
	181	{
	182	i=ASN1_R_WRONG_TAG;
	183	goto err;
	184	}
	185
	186	if (inf & V_ASN1_CONSTRUCTED)
	187	{
	188	ASN1_CTX c;
	189
	190	c.pp=pp;
	191	c.p=p;
	192	c.inf=inf;
	193	c.slen=len;
	194	c.tag=Ptag;
	195	c.xclass=Pclass;
	196	c.max=(length == 0)?0:(p+length);
657e60fa	197	if (!asn1_collate_primitive(ret,&c))
d02b48c6 RE	198	goto err;
	199	else
	200	{
	201	p=c.p;
	202	}
	203	}
	204	else
	205	{
	206	if (len != 0)
	207	{
58964a49	208	if ((ret->length < len) \|\| (ret->data == NULL))
d02b48c6	209	{
26a3a48d RL	210	if (ret->data != NULL) OPENSSL_free(ret->data);
26a3a48d RL	211	s=(unsigned char *)OPENSSL_malloc((int)len + 1);
d02b48c6 RE	212	if (s == NULL)
	213	{
	214	i=ERR_R_MALLOC_FAILURE;
	215	goto err;
	216	}
	217	}
	218	else
	219	s=ret->data;
	220	memcpy(s,p,(int)len);
393f2c65	221	s[len] = '\0';
d02b48c6 RE	222	p+=len;
	223	}
	224	else
	225	{
	226	s=NULL;
26a3a48d	227	if (ret->data != NULL) OPENSSL_free(ret->data);
d02b48c6 RE	228	}
	229
	230	ret->length=(int)len;
	231	ret->data=s;
	232	ret->type=Ptag;
	233	}
	234
	235	if (a != NULL) (*a)=ret;
	236	*pp=p;
	237	return(ret);
	238	err:
	239	if ((ret != NULL) && ((a == NULL) \|\| (*a != ret)))
	240	ASN1_STRING_free(ret);
	241	ASN1err(ASN1_F_D2I_ASN1_BYTES,i);
	242	return(NULL);
	243	}
	244
	245
657e60fa UM	246	/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse
657e60fa UM	247	* them into the one structure that is then returned */
d02b48c6 RE	248	/* There have been a few bug fixes for this function from
d02b48c6 RE	249	* Paul Keogh <paul.keogh@sse.ie>, many thanks to him */
657e60fa	250	static int asn1_collate_primitive(ASN1_STRING a, ASN1_CTX c)
d02b48c6 RE	251	{
	252	ASN1_STRING *os=NULL;
	253	BUF_MEM b;
	254	int num;
	255
	256	b.length=0;
	257	b.max=0;
	258	b.data=NULL;
	259
	260	if (a == NULL)
	261	{
	262	c->error=ERR_R_PASSED_NULL_PARAMETER;
	263	goto err;
	264	}
	265
	266	num=0;
	267	for (;;)
	268	{
	269	if (c->inf & 1)
	270	{
	271	c->eos=ASN1_check_infinite_end(&c->p,
	272	(long)(c->max-c->p));
	273	if (c->eos) break;
	274	}
	275	else
	276	{
	277	if (c->slen <= 0) break;
	278	}
	279
	280	c->q=c->p;
	281	if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass)
	282	== NULL)
	283	{
	284	c->error=ERR_R_ASN1_LIB;
	285	goto err;
	286	}
	287
54a656ef	288	if (!BUF_MEM_grow_clean(&b,num+os->length))
d02b48c6 RE	289	{
	290	c->error=ERR_R_BUF_LIB;
	291	goto err;
	292	}
	293	memcpy(&(b.data[num]),os->data,os->length);
	294	if (!(c->inf & 1))
	295	c->slen-=(c->p-c->q);
	296	num+=os->length;
	297	}
	298
	299	if (!asn1_Finish(c)) goto err;
	300
	301	a->length=num;
26a3a48d	302	if (a->data != NULL) OPENSSL_free(a->data);
d02b48c6 RE	303	a->data=(unsigned char *)b.data;
	304	if (os != NULL) ASN1_STRING_free(os);
	305	return(1);
	306	err:
5d818c30	307	ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error);
d02b48c6	308	if (os != NULL) ASN1_STRING_free(os);
26a3a48d	309	if (b.data != NULL) OPENSSL_free(b.data);
d02b48c6 RE	310	return(0);
	311	}
	312