Home | History | Annotate | Download | only in asn1
      1 /* crypto/asn1/a_object.c */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 <limits.h>
     61 #include "cryptlib.h"
     62 #include <openssl/buffer.h>
     63 #include <openssl/asn1.h>
     64 #include <openssl/objects.h>
     65 #include <openssl/bn.h>
     66 
     67 int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
     68 	{
     69 	unsigned char *p;
     70 	int objsize;
     71 
     72 	if ((a == NULL) || (a->data == NULL)) return(0);
     73 
     74 	objsize = ASN1_object_size(0,a->length,V_ASN1_OBJECT);
     75 	if (pp == NULL) return objsize;
     76 
     77 	p= *pp;
     78 	ASN1_put_object(&p,0,a->length,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
     79 	memcpy(p,a->data,a->length);
     80 	p+=a->length;
     81 
     82 	*pp=p;
     83 	return(objsize);
     84 	}
     85 
     86 int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
     87 	{
     88 	int i,first,len=0,c, use_bn;
     89 	char ftmp[24], *tmp = ftmp;
     90 	int tmpsize = sizeof ftmp;
     91 	const char *p;
     92 	unsigned long l;
     93 	BIGNUM *bl = NULL;
     94 
     95 	if (num == 0)
     96 		return(0);
     97 	else if (num == -1)
     98 		num=strlen(buf);
     99 
    100 	p=buf;
    101 	c= *(p++);
    102 	num--;
    103 	if ((c >= '0') && (c <= '2'))
    104 		{
    105 		first= c-'0';
    106 		}
    107 	else
    108 		{
    109 		ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
    110 		goto err;
    111 		}
    112 
    113 	if (num <= 0)
    114 		{
    115 		ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
    116 		goto err;
    117 		}
    118 	c= *(p++);
    119 	num--;
    120 	for (;;)
    121 		{
    122 		if (num <= 0) break;
    123 		if ((c != '.') && (c != ' '))
    124 			{
    125 			ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
    126 			goto err;
    127 			}
    128 		l=0;
    129 		use_bn = 0;
    130 		for (;;)
    131 			{
    132 			if (num <= 0) break;
    133 			num--;
    134 			c= *(p++);
    135 			if ((c == ' ') || (c == '.'))
    136 				break;
    137 			if ((c < '0') || (c > '9'))
    138 				{
    139 				ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
    140 				goto err;
    141 				}
    142 			if (!use_bn && l >= ((ULONG_MAX - 80) / 10L))
    143 				{
    144 				use_bn = 1;
    145 				if (!bl)
    146 					bl = BN_new();
    147 				if (!bl || !BN_set_word(bl, l))
    148 					goto err;
    149 				}
    150 			if (use_bn)
    151 				{
    152 				if (!BN_mul_word(bl, 10L)
    153 					|| !BN_add_word(bl, c-'0'))
    154 					goto err;
    155 				}
    156 			else
    157 				l=l*10L+(long)(c-'0');
    158 			}
    159 		if (len == 0)
    160 			{
    161 			if ((first < 2) && (l >= 40))
    162 				{
    163 				ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
    164 				goto err;
    165 				}
    166 			if (use_bn)
    167 				{
    168 				if (!BN_add_word(bl, first * 40))
    169 					goto err;
    170 				}
    171 			else
    172 				l+=(long)first*40;
    173 			}
    174 		i=0;
    175 		if (use_bn)
    176 			{
    177 			int blsize;
    178 			blsize = BN_num_bits(bl);
    179 			blsize = (blsize + 6)/7;
    180 			if (blsize > tmpsize)
    181 				{
    182 				if (tmp != ftmp)
    183 					OPENSSL_free(tmp);
    184 				tmpsize = blsize + 32;
    185 				tmp = OPENSSL_malloc(tmpsize);
    186 				if (!tmp)
    187 					goto err;
    188 				}
    189 			while(blsize--)
    190 				tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
    191 			}
    192 		else
    193 			{
    194 
    195 			for (;;)
    196 				{
    197 				tmp[i++]=(unsigned char)l&0x7f;
    198 				l>>=7L;
    199 				if (l == 0L) break;
    200 				}
    201 
    202 			}
    203 		if (out != NULL)
    204 			{
    205 			if (len+i > olen)
    206 				{
    207 				ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
    208 				goto err;
    209 				}
    210 			while (--i > 0)
    211 				out[len++]=tmp[i]|0x80;
    212 			out[len++]=tmp[0];
    213 			}
    214 		else
    215 			len+=i;
    216 		}
    217 	if (tmp != ftmp)
    218 		OPENSSL_free(tmp);
    219 	if (bl)
    220 		BN_free(bl);
    221 	return(len);
    222 err:
    223 	if (tmp != ftmp)
    224 		OPENSSL_free(tmp);
    225 	if (bl)
    226 		BN_free(bl);
    227 	return(0);
    228 	}
    229 
    230 int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
    231 {
    232 	return OBJ_obj2txt(buf, buf_len, a, 0);
    233 }
    234 
    235 int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
    236 	{
    237 	char buf[80], *p = buf;
    238 	int i;
    239 
    240 	if ((a == NULL) || (a->data == NULL))
    241 		return(BIO_write(bp,"NULL",4));
    242 	i=i2t_ASN1_OBJECT(buf,sizeof buf,a);
    243 	if (i > (int)(sizeof(buf) - 1))
    244 		{
    245 		p = OPENSSL_malloc(i + 1);
    246 		if (!p)
    247 			return -1;
    248 		i2t_ASN1_OBJECT(p,i + 1,a);
    249 		}
    250 	if (i <= 0)
    251 		return BIO_write(bp, "<INVALID>", 9);
    252 	BIO_write(bp,p,i);
    253 	if (p != buf)
    254 		OPENSSL_free(p);
    255 	return(i);
    256 	}
    257 
    258 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
    259 	     long length)
    260 {
    261 	const unsigned char *p;
    262 	long len;
    263 	int tag,xclass;
    264 	int inf,i;
    265 	ASN1_OBJECT *ret = NULL;
    266 	p= *pp;
    267 	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
    268 	if (inf & 0x80)
    269 		{
    270 		i=ASN1_R_BAD_OBJECT_HEADER;
    271 		goto err;
    272 		}
    273 
    274 	if (tag != V_ASN1_OBJECT)
    275 		{
    276 		i=ASN1_R_EXPECTING_AN_OBJECT;
    277 		goto err;
    278 		}
    279 	ret = c2i_ASN1_OBJECT(a, &p, len);
    280 	if(ret) *pp = p;
    281 	return ret;
    282 err:
    283 	ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
    284 	return(NULL);
    285 }
    286 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
    287 	     long len)
    288 	{
    289 	ASN1_OBJECT *ret=NULL;
    290 	const unsigned char *p;
    291 	unsigned char *data;
    292 	int i;
    293 	/* Sanity check OID encoding: can't have leading 0x80 in
    294 	 * subidentifiers, see: X.690 8.19.2
    295 	 */
    296 	for (i = 0, p = *pp; i < len; i++, p++)
    297 		{
    298 		if (*p == 0x80 && (!i || !(p[-1] & 0x80)))
    299 			{
    300 			ASN1err(ASN1_F_C2I_ASN1_OBJECT,ASN1_R_INVALID_OBJECT_ENCODING);
    301 			return NULL;
    302 			}
    303 		}
    304 
    305 	/* only the ASN1_OBJECTs from the 'table' will have values
    306 	 * for ->sn or ->ln */
    307 	if ((a == NULL) || ((*a) == NULL) ||
    308 		!((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC))
    309 		{
    310 		if ((ret=ASN1_OBJECT_new()) == NULL) return(NULL);
    311 		}
    312 	else	ret=(*a);
    313 
    314 	p= *pp;
    315 	/* detach data from object */
    316 	data = (unsigned char *)ret->data;
    317 	ret->data = NULL;
    318 	/* once detached we can change it */
    319 	if ((data == NULL) || (ret->length < len))
    320 		{
    321 		ret->length=0;
    322 		if (data != NULL) OPENSSL_free(data);
    323 		data=(unsigned char *)OPENSSL_malloc(len ? (int)len : 1);
    324 		if (data == NULL)
    325 			{ i=ERR_R_MALLOC_FAILURE; goto err; }
    326 		ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
    327 		}
    328 	memcpy(data,p,(int)len);
    329 	/* reattach data to object, after which it remains const */
    330 	ret->data  =data;
    331 	ret->length=(int)len;
    332 	ret->sn=NULL;
    333 	ret->ln=NULL;
    334 	/* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
    335 	p+=len;
    336 
    337 	if (a != NULL) (*a)=ret;
    338 	*pp=p;
    339 	return(ret);
    340 err:
    341 	ASN1err(ASN1_F_C2I_ASN1_OBJECT,i);
    342 	if ((ret != NULL) && ((a == NULL) || (*a != ret)))
    343 		ASN1_OBJECT_free(ret);
    344 	return(NULL);
    345 	}
    346 
    347 ASN1_OBJECT *ASN1_OBJECT_new(void)
    348 	{
    349 	ASN1_OBJECT *ret;
    350 
    351 	ret=(ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
    352 	if (ret == NULL)
    353 		{
    354 		ASN1err(ASN1_F_ASN1_OBJECT_NEW,ERR_R_MALLOC_FAILURE);
    355 		return(NULL);
    356 		}
    357 	ret->length=0;
    358 	ret->data=NULL;
    359 	ret->nid=0;
    360 	ret->sn=NULL;
    361 	ret->ln=NULL;
    362 	ret->flags=ASN1_OBJECT_FLAG_DYNAMIC;
    363 	return(ret);
    364 	}
    365 
    366 void ASN1_OBJECT_free(ASN1_OBJECT *a)
    367 	{
    368 	if (a == NULL) return;
    369 	if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS)
    370 		{
    371 #ifndef CONST_STRICT /* disable purely for compile-time strict const checking. Doing this on a "real" compile will cause memory leaks */
    372 		if (a->sn != NULL) OPENSSL_free((void *)a->sn);
    373 		if (a->ln != NULL) OPENSSL_free((void *)a->ln);
    374 #endif
    375 		a->sn=a->ln=NULL;
    376 		}
    377 	if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA)
    378 		{
    379 		if (a->data != NULL) OPENSSL_free((void *)a->data);
    380 		a->data=NULL;
    381 		a->length=0;
    382 		}
    383 	if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
    384 		OPENSSL_free(a);
    385 	}
    386 
    387 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
    388 	     const char *sn, const char *ln)
    389 	{
    390 	ASN1_OBJECT o;
    391 
    392 	o.sn=sn;
    393 	o.ln=ln;
    394 	o.data=data;
    395 	o.nid=nid;
    396 	o.length=len;
    397 	o.flags=ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
    398 		ASN1_OBJECT_FLAG_DYNAMIC_DATA;
    399 	return(OBJ_dup(&o));
    400 	}
    401 
    402 IMPLEMENT_STACK_OF(ASN1_OBJECT)
    403 IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT)
    404