/* 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_const_CTX *c);

 /* type is a 'bitmap' of acceptable string types.

  */

 EXPORT_C ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, const unsigned char **pp,

 	     long length, int type)

 	{

 	ASN1_STRING *ret=NULL;

 	const unsigned char *p;

 	unsigned char *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);

 	}

 EXPORT_C 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);

 	}

 EXPORT_C ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, const unsigned char **pp,

 	     long length, int Ptag, int Pclass)

 	{

 	ASN1_STRING *ret=NULL;

 	const unsigned char *p;

 	unsigned char *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_const_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_const_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_const_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_const_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);

 	}