220 lines
6.9 KiB
C
220 lines
6.9 KiB
C
/* crypto/asn1/a_set.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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#ifndef NO_ASN1_OLD
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typedef struct
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{
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unsigned char *pbData;
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int cbData;
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} MYBLOB;
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/* SetBlobCmp
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* This function compares two elements of SET_OF block
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*/
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static int SetBlobCmp(const void *elem1, const void *elem2 )
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{
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const MYBLOB *b1 = (const MYBLOB *)elem1;
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const MYBLOB *b2 = (const MYBLOB *)elem2;
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int r;
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r = memcmp(b1->pbData, b2->pbData,
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b1->cbData < b2->cbData ? b1->cbData : b2->cbData);
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if(r != 0)
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return r;
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return b1->cbData-b2->cbData;
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}
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/* int is_set: if TRUE, then sort the contents (i.e. it isn't a SEQUENCE) */
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int i2d_ASN1_SET(STACK *a, unsigned char **pp, int (*func)(), int ex_tag,
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int ex_class, int is_set)
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{
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int ret=0,r;
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int i;
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unsigned char *p;
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unsigned char *pStart, *pTempMem;
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MYBLOB *rgSetBlob;
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int totSize;
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if (a == NULL) return(0);
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for (i=sk_num(a)-1; i>=0; i--)
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ret+=func(sk_value(a,i),NULL);
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r=ASN1_object_size(1,ret,ex_tag);
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if (pp == NULL) return(r);
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p= *pp;
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ASN1_put_object(&p,1,ret,ex_tag,ex_class);
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/* Modified by gp@nsj.co.jp */
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/* And then again by Ben */
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/* And again by Steve */
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if(!is_set || (sk_num(a) < 2))
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{
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for (i=0; i<sk_num(a); i++)
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func(sk_value(a,i),&p);
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*pp=p;
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return(r);
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}
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pStart = p; /* Catch the beg of Setblobs*/
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if (!(rgSetBlob = (MYBLOB *)OPENSSL_malloc( sk_num(a) * sizeof(MYBLOB)))) return 0; /* In this array
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we will store the SET blobs */
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for (i=0; i<sk_num(a); i++)
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{
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rgSetBlob[i].pbData = p; /* catch each set encode blob */
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func(sk_value(a,i),&p);
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rgSetBlob[i].cbData = p - rgSetBlob[i].pbData; /* Length of this
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SetBlob
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*/
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}
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*pp=p;
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totSize = p - pStart; /* This is the total size of all set blobs */
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/* Now we have to sort the blobs. I am using a simple algo.
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*Sort ptrs *Copy to temp-mem *Copy from temp-mem to user-mem*/
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qsort( rgSetBlob, sk_num(a), sizeof(MYBLOB), SetBlobCmp);
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if (!(pTempMem = OPENSSL_malloc(totSize))) return 0;
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/* Copy to temp mem */
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p = pTempMem;
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for(i=0; i<sk_num(a); ++i)
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{
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memcpy(p, rgSetBlob[i].pbData, rgSetBlob[i].cbData);
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p += rgSetBlob[i].cbData;
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}
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/* Copy back to user mem*/
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memcpy(pStart, pTempMem, totSize);
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OPENSSL_free(pTempMem);
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OPENSSL_free(rgSetBlob);
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return(r);
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}
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STACK *d2i_ASN1_SET(STACK **a, unsigned char **pp, long length,
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char *(*func)(), void (*free_func)(void *), int ex_tag, int ex_class)
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{
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ASN1_CTX c;
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STACK *ret=NULL;
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if ((a == NULL) || ((*a) == NULL))
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{ if ((ret=sk_new_null()) == NULL) goto err; }
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else
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ret=(*a);
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c.p= *pp;
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c.max=(length == 0)?0:(c.p+length);
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c.inf=ASN1_get_object(&c.p,&c.slen,&c.tag,&c.xclass,c.max-c.p);
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if (c.inf & 0x80) goto err;
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if (ex_class != c.xclass)
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{
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ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_CLASS);
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goto err;
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}
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if (ex_tag != c.tag)
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{
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ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_BAD_TAG);
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goto err;
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}
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if ((c.slen+c.p) > c.max)
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{
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ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_LENGTH_ERROR);
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goto err;
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}
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/* check for infinite constructed - it can be as long
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* as the amount of data passed to us */
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if (c.inf == (V_ASN1_CONSTRUCTED+1))
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c.slen=length+ *pp-c.p;
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c.max=c.p+c.slen;
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while (c.p < c.max)
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{
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char *s;
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if (M_ASN1_D2I_end_sequence()) break;
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if ((s=func(NULL,&c.p,c.slen,c.max-c.p)) == NULL)
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{
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ASN1err(ASN1_F_D2I_ASN1_SET,ASN1_R_ERROR_PARSING_SET_ELEMENT);
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asn1_add_error(*pp,(int)(c.q- *pp));
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goto err;
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}
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if (!sk_push(ret,s)) goto err;
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}
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if (a != NULL) (*a)=ret;
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*pp=c.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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{
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if (free_func != NULL)
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sk_pop_free(ret,free_func);
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else
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sk_free(ret);
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}
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return(NULL);
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}
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#endif
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