sl@0: /* crypto/asn1/a_bytes.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: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/asn1.h>
sl@0: 
sl@0: static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c);
sl@0: /* type is a 'bitmap' of acceptable string types.
sl@0:  */
sl@0: EXPORT_C ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, const unsigned char **pp,
sl@0: 	     long length, int type)
sl@0: 	{
sl@0: 	ASN1_STRING *ret=NULL;
sl@0: 	const unsigned char *p;
sl@0: 	unsigned char *s;
sl@0: 	long len;
sl@0: 	int inf,tag,xclass;
sl@0: 	int i=0;
sl@0: 
sl@0: 	p= *pp;
sl@0: 	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
sl@0: 	if (inf & 0x80) goto err;
sl@0: 
sl@0: 	if (tag >= 32)
sl@0: 		{
sl@0: 		i=ASN1_R_TAG_VALUE_TOO_HIGH;;
sl@0: 		goto err;
sl@0: 		}
sl@0: 	if (!(ASN1_tag2bit(tag) & type))
sl@0: 		{
sl@0: 		i=ASN1_R_WRONG_TYPE;
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	/* If a bit-string, exit early */
sl@0: 	if (tag == V_ASN1_BIT_STRING)
sl@0: 		return(d2i_ASN1_BIT_STRING(a,pp,length));
sl@0: 
sl@0: 	if ((a == NULL) || ((*a) == NULL))
sl@0: 		{
sl@0: 		if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
sl@0: 		}
sl@0: 	else
sl@0: 		ret=(*a);
sl@0: 
sl@0: 	if (len != 0)
sl@0: 		{
sl@0: 		s=(unsigned char *)OPENSSL_malloc((int)len+1);
sl@0: 		if (s == NULL)
sl@0: 			{
sl@0: 			i=ERR_R_MALLOC_FAILURE;
sl@0: 			goto err;
sl@0: 			}
sl@0: 		memcpy(s,p,(int)len);
sl@0: 		s[len]='\0';
sl@0: 		p+=len;
sl@0: 		}
sl@0: 	else
sl@0: 		s=NULL;
sl@0: 
sl@0: 	if (ret->data != NULL) OPENSSL_free(ret->data);
sl@0: 	ret->length=(int)len;
sl@0: 	ret->data=s;
sl@0: 	ret->type=tag;
sl@0: 	if (a != NULL) (*a)=ret;
sl@0: 	*pp=p;
sl@0: 	return(ret);
sl@0: err:
sl@0: 	ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i);
sl@0: 	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
sl@0: 		ASN1_STRING_free(ret);
sl@0: 	return(NULL);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass)
sl@0: 	{
sl@0: 	int ret,r,constructed;
sl@0: 	unsigned char *p;
sl@0: 
sl@0: 	if (a == NULL)  return(0);
sl@0: 
sl@0: 	if (tag == V_ASN1_BIT_STRING)
sl@0: 		return(i2d_ASN1_BIT_STRING(a,pp));
sl@0: 		
sl@0: 	ret=a->length;
sl@0: 	r=ASN1_object_size(0,ret,tag);
sl@0: 	if (pp == NULL) return(r);
sl@0: 	p= *pp;
sl@0: 
sl@0: 	if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET))
sl@0: 		constructed=1;
sl@0: 	else
sl@0: 		constructed=0;
sl@0: 	ASN1_put_object(&p,constructed,ret,tag,xclass);
sl@0: 	memcpy(p,a->data,a->length);
sl@0: 	p+=a->length;
sl@0: 	*pp= p;
sl@0: 	return(r);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, const unsigned char **pp,
sl@0: 	     long length, int Ptag, int Pclass)
sl@0: 	{
sl@0: 	ASN1_STRING *ret=NULL;
sl@0: 	const unsigned char *p;
sl@0: 	unsigned char *s;
sl@0: 	long len;
sl@0: 	int inf,tag,xclass;
sl@0: 	int i=0;
sl@0: 
sl@0: 	if ((a == NULL) || ((*a) == NULL))
sl@0: 		{
sl@0: 		if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
sl@0: 		}
sl@0: 	else
sl@0: 		ret=(*a);
sl@0: 
sl@0: 	p= *pp;
sl@0: 	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
sl@0: 	if (inf & 0x80)
sl@0: 		{
sl@0: 		i=ASN1_R_BAD_OBJECT_HEADER;
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	if (tag != Ptag)
sl@0: 		{
sl@0: 		i=ASN1_R_WRONG_TAG;
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	if (inf & V_ASN1_CONSTRUCTED)
sl@0: 		{
sl@0: 		ASN1_const_CTX c;
sl@0: 
sl@0: 		c.pp=pp;
sl@0: 		c.p=p;
sl@0: 		c.inf=inf;
sl@0: 		c.slen=len;
sl@0: 		c.tag=Ptag;
sl@0: 		c.xclass=Pclass;
sl@0: 		c.max=(length == 0)?0:(p+length);
sl@0: 		if (!asn1_collate_primitive(ret,&c)) 
sl@0: 			goto err; 
sl@0: 		else
sl@0: 			{
sl@0: 			p=c.p;
sl@0: 			}
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		if (len != 0)
sl@0: 			{
sl@0: 			if ((ret->length < len) || (ret->data == NULL))
sl@0: 				{
sl@0: 				if (ret->data != NULL) OPENSSL_free(ret->data);
sl@0: 				s=(unsigned char *)OPENSSL_malloc((int)len + 1);
sl@0: 				if (s == NULL)
sl@0: 					{
sl@0: 					i=ERR_R_MALLOC_FAILURE;
sl@0: 					goto err;
sl@0: 					}
sl@0: 				}
sl@0: 			else
sl@0: 				s=ret->data;
sl@0: 			memcpy(s,p,(int)len);
sl@0: 			s[len] = '\0';
sl@0: 			p+=len;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			s=NULL;
sl@0: 			if (ret->data != NULL) OPENSSL_free(ret->data);
sl@0: 			}
sl@0: 
sl@0: 		ret->length=(int)len;
sl@0: 		ret->data=s;
sl@0: 		ret->type=Ptag;
sl@0: 		}
sl@0: 
sl@0: 	if (a != NULL) (*a)=ret;
sl@0: 	*pp=p;
sl@0: 	return(ret);
sl@0: err:
sl@0: 	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
sl@0: 		ASN1_STRING_free(ret);
sl@0: 	ASN1err(ASN1_F_D2I_ASN1_BYTES,i);
sl@0: 	return(NULL);
sl@0: 	}
sl@0: 
sl@0: 
sl@0: /* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse
sl@0:  * them into the one structure that is then returned */
sl@0: /* There have been a few bug fixes for this function from
sl@0:  * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */
sl@0: static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c)
sl@0: 	{
sl@0: 	ASN1_STRING *os=NULL;
sl@0: 	BUF_MEM b;
sl@0: 	int num;
sl@0: 
sl@0: 	b.length=0;
sl@0: 	b.max=0;
sl@0: 	b.data=NULL;
sl@0: 
sl@0: 	if (a == NULL)
sl@0: 		{
sl@0: 		c->error=ERR_R_PASSED_NULL_PARAMETER;
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	num=0;
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		if (c->inf & 1)
sl@0: 			{
sl@0: 			c->eos=ASN1_const_check_infinite_end(&c->p,
sl@0: 				(long)(c->max-c->p));
sl@0: 			if (c->eos) break;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			if (c->slen <= 0) break;
sl@0: 			}
sl@0: 
sl@0: 		c->q=c->p;
sl@0: 		if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass)
sl@0: 			== NULL)
sl@0: 			{
sl@0: 			c->error=ERR_R_ASN1_LIB;
sl@0: 			goto err;
sl@0: 			}
sl@0: 
sl@0: 		if (!BUF_MEM_grow_clean(&b,num+os->length))
sl@0: 			{
sl@0: 			c->error=ERR_R_BUF_LIB;
sl@0: 			goto err;
sl@0: 			}
sl@0: 		memcpy(&(b.data[num]),os->data,os->length);
sl@0: 		if (!(c->inf & 1))
sl@0: 			c->slen-=(c->p-c->q);
sl@0: 		num+=os->length;
sl@0: 		}
sl@0: 
sl@0: 	if (!asn1_const_Finish(c)) goto err;
sl@0: 
sl@0: 	a->length=num;
sl@0: 	if (a->data != NULL) OPENSSL_free(a->data);
sl@0: 	a->data=(unsigned char *)b.data;
sl@0: 	if (os != NULL) ASN1_STRING_free(os);
sl@0: 	return(1);
sl@0: err:
sl@0: 	ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error);
sl@0: 	if (os != NULL) ASN1_STRING_free(os);
sl@0: 	if (b.data != NULL) OPENSSL_free(b.data);
sl@0: 	return(0);
sl@0: 	}
sl@0: