1 /* crypto/asn1/evp_asn1.c */

     2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

     3  * All rights reserved.

     4  *

     5  * This package is an SSL implementation written

     6  * by Eric Young (eay@cryptsoft.com).

     7  * The implementation was written so as to conform with Netscapes SSL.

     8  * 

     9  * This library is free for commercial and non-commercial use as long as

    10  * the following conditions are aheared to.  The following conditions

    11  * apply to all code found in this distribution, be it the RC4, RSA,

    12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

    13  * included with this distribution is covered by the same copyright terms

    14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).

    15  * 

    16  * Copyright remains Eric Young's, and as such any Copyright notices in

    17  * the code are not to be removed.

    18  * If this package is used in a product, Eric Young should be given attribution

    19  * as the author of the parts of the library used.

    20  * This can be in the form of a textual message at program startup or

    21  * in documentation (online or textual) provided with the package.

    22  * 

    23  * Redistribution and use in source and binary forms, with or without

    24  * modification, are permitted provided that the following conditions

    25  * are met:

    26  * 1. Redistributions of source code must retain the copyright

    27  *    notice, this list of conditions and the following disclaimer.

    28  * 2. Redistributions in binary form must reproduce the above copyright

    29  *    notice, this list of conditions and the following disclaimer in the

    30  *    documentation and/or other materials provided with the distribution.

    31  * 3. All advertising materials mentioning features or use of this software

    32  *    must display the following acknowledgement:

    33  *    "This product includes cryptographic software written by

    34  *     Eric Young (eay@cryptsoft.com)"

    35  *    The word 'cryptographic' can be left out if the rouines from the library

    36  *    being used are not cryptographic related :-).

    37  * 4. If you include any Windows specific code (or a derivative thereof) from 

    38  *    the apps directory (application code) you must include an acknowledgement:

    39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

    40  * 

    41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

    42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

    45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

    46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

    47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

    48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

    49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

    50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

    51  * SUCH DAMAGE.

    52  * 

    53  * The licence and distribution terms for any publically available version or

    54  * derivative of this code cannot be changed.  i.e. this code cannot simply be

    55  * copied and put under another distribution licence

    56  * [including the GNU Public Licence.]

    57  */

    58 

    59 #include <stdio.h>

    60 #include "cryptlib.h"

    61 #include <openssl/asn1.h>

    62 #include <openssl/asn1_mac.h>

    63 

    64 EXPORT_C int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)

    65 	{

    66 	ASN1_STRING *os;

    67 

    68 	if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);

    69 	if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);

    70 	ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);

    71 	return(1);

    72 	}

    73 

    74 /* int max_len:  for returned value    */

    75 EXPORT_C int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data,

    76 	     int max_len)

    77 	{

    78 	int ret,num;

    79 	unsigned char *p;

    80 

    81 	if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))

    82 		{

    83 		ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG);

    84 		return(-1);

    85 		}

    86 	p=M_ASN1_STRING_data(a->value.octet_string);

    87 	ret=M_ASN1_STRING_length(a->value.octet_string);

    88 	if (ret < max_len)

    89 		num=ret;

    90 	else

    91 		num=max_len;

    92 	memcpy(data,p,num);

    93 	return(ret);

    94 	}

    95 

    96 EXPORT_C int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,

    97 	     int len)

    98 	{

    99 	int n,size;

   100 	ASN1_OCTET_STRING os,*osp;

   101 	ASN1_INTEGER in;

   102 	unsigned char *p;

   103 	unsigned char buf[32]; /* when they have 256bit longs, 

   104 				* I'll be in trouble */

   105 	in.data=buf;

   106 	in.length=32;

   107 	os.data=data;

   108 	os.type=V_ASN1_OCTET_STRING;

   109 	os.length=len;

   110 	ASN1_INTEGER_set(&in,num);

   111 	n =  i2d_ASN1_INTEGER(&in,NULL);

   112 	n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);

   113 

   114 	size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);

   115 

   116 	if ((osp=ASN1_STRING_new()) == NULL) return(0);

   117 	/* Grow the 'string' */

   118 	if (!ASN1_STRING_set(osp,NULL,size))

   119 		{

   120 		ASN1_STRING_free(osp);

   121 		return(0);

   122 		}

   123 

   124 	M_ASN1_STRING_length_set(osp, size);

   125 	p=M_ASN1_STRING_data(osp);

   126 

   127 	ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);

   128 	  i2d_ASN1_INTEGER(&in,&p);

   129 	M_i2d_ASN1_OCTET_STRING(&os,&p);

   130 

   131 	ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);

   132 	return(1);

   133 	}

   134 

   135 /* we return the actual length..., num may be missing, in which

   136  * case, set it to zero */

   137 /* int max_len:  for returned value    */

   138 EXPORT_C int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,

   139 	     int max_len)

   140 	{

   141 	int ret= -1,n;

   142 	ASN1_INTEGER *ai=NULL;

   143 	ASN1_OCTET_STRING *os=NULL;

   144 	const unsigned char *p;

   145 	long length;

   146 	ASN1_const_CTX c;

   147 

   148 	if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))

   149 		{

   150 		goto err;

   151 		}

   152 	p=M_ASN1_STRING_data(a->value.sequence);

   153 	length=M_ASN1_STRING_length(a->value.sequence);

   154 

   155 	c.pp= &p;

   156 	c.p=p;

   157 	c.max=p+length;

   158 	c.error=ASN1_R_DATA_IS_WRONG;

   159 

   160 	M_ASN1_D2I_start_sequence();

   161 	c.q=c.p;

   162 	if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;

   163         c.slen-=(c.p-c.q);

   164 	c.q=c.p;

   165 	if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;

   166         c.slen-=(c.p-c.q);

   167 	if (!M_ASN1_D2I_end_sequence()) goto err;

   168 

   169 	if (num != NULL)

   170 		*num=ASN1_INTEGER_get(ai);

   171 

   172 	ret=M_ASN1_STRING_length(os);

   173 	if (max_len > ret)

   174 		n=ret;

   175 	else

   176 		n=max_len;

   177 

   178 	if (data != NULL)

   179 		memcpy(data,M_ASN1_STRING_data(os),n);

   180 	if (0)

   181 		{

   182 err:

   183 		ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);

   184 		}

   185 	if (os != NULL) M_ASN1_OCTET_STRING_free(os);

   186 	if (ai != NULL) M_ASN1_INTEGER_free(ai);

   187 	return(ret);

   188 	}

   189