190 lines
6.1 KiB
C
190 lines
6.1 KiB
C
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/* crypto/asn1/evp_asn1.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.h>
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#include <openssl/asn1_mac.h>
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int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
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{
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ASN1_STRING *os;
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if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);
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if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);
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ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);
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return(1);
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}
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/* int max_len: for returned value */
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int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data,
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int max_len)
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{
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int ret,num;
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unsigned char *p;
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if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))
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{
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ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
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return(-1);
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}
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p=M_ASN1_STRING_data(a->value.octet_string);
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ret=M_ASN1_STRING_length(a->value.octet_string);
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if (ret < max_len)
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num=ret;
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else
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num=max_len;
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memcpy(data,p,num);
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return(ret);
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}
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int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
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int len)
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{
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int n,size;
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ASN1_OCTET_STRING os,*osp;
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ASN1_INTEGER in;
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unsigned char *p;
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unsigned char buf[32]; /* when they have 256bit longs,
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* I'll be in trouble */
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in.data=buf;
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in.length=32;
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os.data=data;
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os.type=V_ASN1_OCTET_STRING;
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os.length=len;
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ASN1_INTEGER_set(&in,num);
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n = i2d_ASN1_INTEGER(&in,NULL);
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n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);
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size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);
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if ((osp=ASN1_STRING_new()) == NULL) return(0);
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/* Grow the 'string' */
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if (!ASN1_STRING_set(osp,NULL,size))
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{
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ASN1_STRING_free(osp);
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return(0);
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}
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M_ASN1_STRING_length_set(osp, size);
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p=M_ASN1_STRING_data(osp);
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ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
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i2d_ASN1_INTEGER(&in,&p);
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M_i2d_ASN1_OCTET_STRING(&os,&p);
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ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);
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return(1);
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}
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/* we return the actual length..., num may be missing, in which
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* case, set it to zero */
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/* int max_len: for returned value */
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int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,
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int max_len)
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{
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int ret= -1,n;
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ASN1_INTEGER *ai=NULL;
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ASN1_OCTET_STRING *os=NULL;
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const unsigned char *p;
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long length;
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ASN1_const_CTX c;
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if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))
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{
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goto err;
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}
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p=M_ASN1_STRING_data(a->value.sequence);
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length=M_ASN1_STRING_length(a->value.sequence);
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c.pp= &p;
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c.p=p;
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c.max=p+length;
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c.error=ASN1_R_DATA_IS_WRONG;
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M_ASN1_D2I_start_sequence();
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c.q=c.p;
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if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;
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c.slen-=(c.p-c.q);
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c.q=c.p;
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if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;
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c.slen-=(c.p-c.q);
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if (!M_ASN1_D2I_end_sequence()) goto err;
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if (num != NULL)
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*num=ASN1_INTEGER_get(ai);
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ret=M_ASN1_STRING_length(os);
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if (max_len > ret)
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n=ret;
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else
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n=max_len;
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if (data != NULL)
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memcpy(data,M_ASN1_STRING_data(os),n);
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if (0)
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{
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err:
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ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
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}
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if (os != NULL) M_ASN1_OCTET_STRING_free(os);
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if (ai != NULL) M_ASN1_INTEGER_free(ai);
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return(ret);
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}
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