323 lines
8.1 KiB
C
323 lines
8.1 KiB
C
/* crypto/asn1/a_bytes.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/asn1_mac.h>
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static unsigned long tag2bit[32]={
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0, 0, 0, B_ASN1_BIT_STRING, /* tags 0 - 3 */
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B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN,/* tags 4- 7 */
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B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,/* tags 8-11 */
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B_ASN1_UTF8STRING,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,/* tags 12-15 */
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0, 0, B_ASN1_NUMERICSTRING,B_ASN1_PRINTABLESTRING,
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B_ASN1_T61STRING,B_ASN1_VIDEOTEXSTRING,B_ASN1_IA5STRING,0,
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0,B_ASN1_GRAPHICSTRING,B_ASN1_ISO64STRING,B_ASN1_GENERALSTRING,
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B_ASN1_UNIVERSALSTRING,B_ASN1_UNKNOWN,B_ASN1_BMPSTRING,B_ASN1_UNKNOWN,
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};
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static int asn1_collate_primative(ASN1_STRING *a, ASN1_CTX *c);
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/* type is a 'bitmap' of acceptable string types.
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*/
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ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, unsigned char **pp,
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long length, int type)
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{
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ASN1_STRING *ret=NULL;
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unsigned char *p,*s;
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long len;
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int inf,tag,xclass;
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int i=0;
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p= *pp;
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inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
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if (inf & 0x80) goto err;
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if (tag >= 32)
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{
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i=ASN1_R_TAG_VALUE_TOO_HIGH;;
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goto err;
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}
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if (!(tag2bit[tag] & type))
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{
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i=ASN1_R_WRONG_TYPE;
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goto err;
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}
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/* If a bit-string, exit early */
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if (tag == V_ASN1_BIT_STRING)
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return(d2i_ASN1_BIT_STRING(a,pp,length));
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if ((a == NULL) || ((*a) == NULL))
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{
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if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
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}
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else
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ret=(*a);
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if (len != 0)
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{
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s=(unsigned char *)Malloc((int)len+1);
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if (s == NULL)
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{
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i=ERR_R_MALLOC_FAILURE;
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goto err;
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}
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memcpy(s,p,(int)len);
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s[len]='\0';
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p+=len;
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}
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else
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s=NULL;
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if (ret->data != NULL) Free((char *)ret->data);
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ret->length=(int)len;
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ret->data=s;
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ret->type=tag;
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if (a != NULL) (*a)=ret;
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*pp=p;
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return(ret);
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err:
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ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i);
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if ((ret != NULL) && ((a == NULL) || (*a != ret)))
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ASN1_STRING_free(ret);
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return(NULL);
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}
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int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass)
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{
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int ret,r,constructed;
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unsigned char *p;
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if (a == NULL) return(0);
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if (tag == V_ASN1_BIT_STRING)
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return(i2d_ASN1_BIT_STRING(a,pp));
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ret=a->length;
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r=ASN1_object_size(0,ret,tag);
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if (pp == NULL) return(r);
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p= *pp;
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if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET))
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constructed=1;
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else
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constructed=0;
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ASN1_put_object(&p,constructed,ret,tag,xclass);
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memcpy(p,a->data,a->length);
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p+=a->length;
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*pp= p;
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return(r);
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}
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ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, unsigned char **pp, long length,
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int Ptag, int Pclass)
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{
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ASN1_STRING *ret=NULL;
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unsigned char *p,*s;
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long len;
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int inf,tag,xclass;
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int i=0;
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if ((a == NULL) || ((*a) == NULL))
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{
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if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
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}
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else
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ret=(*a);
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p= *pp;
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inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
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if (inf & 0x80)
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{
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i=ASN1_R_BAD_OBJECT_HEADER;
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goto err;
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}
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if (tag != Ptag)
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{
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i=ASN1_R_WRONG_TAG;
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goto err;
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}
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if (inf & V_ASN1_CONSTRUCTED)
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{
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ASN1_CTX c;
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c.pp=pp;
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c.p=p;
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c.inf=inf;
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c.slen=len;
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c.tag=Ptag;
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c.xclass=Pclass;
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c.max=(length == 0)?0:(p+length);
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if (!asn1_collate_primative(ret,&c))
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goto err;
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else
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{
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p=c.p;
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}
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}
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else
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{
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if (len != 0)
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{
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if ((ret->length < len) || (ret->data == NULL))
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{
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if (ret->data != NULL) Free((char *)ret->data);
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s=(unsigned char *)Malloc((int)len + 1);
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if (s == NULL)
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{
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i=ERR_R_MALLOC_FAILURE;
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goto err;
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}
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}
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else
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s=ret->data;
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memcpy(s,p,(int)len);
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s[len] = '\0';
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p+=len;
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}
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else
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{
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s=NULL;
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if (ret->data != NULL) Free((char *)ret->data);
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}
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ret->length=(int)len;
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ret->data=s;
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ret->type=Ptag;
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}
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if (a != NULL) (*a)=ret;
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*pp=p;
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return(ret);
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err:
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if ((ret != NULL) && ((a == NULL) || (*a != ret)))
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ASN1_STRING_free(ret);
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ASN1err(ASN1_F_D2I_ASN1_BYTES,i);
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return(NULL);
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}
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/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapes
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* them into the one struture that is then returned */
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/* There have been a few bug fixes for this function from
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* Paul Keogh <paul.keogh@sse.ie>, many thanks to him */
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static int asn1_collate_primative(ASN1_STRING *a, ASN1_CTX *c)
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{
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ASN1_STRING *os=NULL;
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BUF_MEM b;
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int num;
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b.length=0;
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b.max=0;
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b.data=NULL;
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if (a == NULL)
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{
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c->error=ERR_R_PASSED_NULL_PARAMETER;
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goto err;
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}
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num=0;
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for (;;)
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{
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if (c->inf & 1)
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{
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c->eos=ASN1_check_infinite_end(&c->p,
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(long)(c->max-c->p));
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if (c->eos) break;
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}
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else
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{
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if (c->slen <= 0) break;
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}
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c->q=c->p;
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if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass)
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== NULL)
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{
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c->error=ERR_R_ASN1_LIB;
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goto err;
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}
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if (!BUF_MEM_grow(&b,num+os->length))
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{
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c->error=ERR_R_BUF_LIB;
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goto err;
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}
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memcpy(&(b.data[num]),os->data,os->length);
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if (!(c->inf & 1))
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c->slen-=(c->p-c->q);
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num+=os->length;
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}
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if (!asn1_Finish(c)) goto err;
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a->length=num;
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if (a->data != NULL) Free(a->data);
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a->data=(unsigned char *)b.data;
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if (os != NULL) ASN1_STRING_free(os);
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return(1);
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err:
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ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error);
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if (os != NULL) ASN1_STRING_free(os);
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if (b.data != NULL) Free(b.data);
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return(0);
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}
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