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      1 /* tasn_prn.c */
      2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL
      3  * project 2000.
      4  */
      5 /* ====================================================================
      6  * Copyright (c) 2000,2005 The OpenSSL Project.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in
     17  *    the documentation and/or other materials provided with the
     18  *    distribution.
     19  *
     20  * 3. All advertising materials mentioning features or use of this
     21  *    software must display the following acknowledgment:
     22  *    "This product includes software developed by the OpenSSL Project
     23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
     24  *
     25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
     26  *    endorse or promote products derived from this software without
     27  *    prior written permission. For written permission, please contact
     28  *    licensing (at) OpenSSL.org.
     29  *
     30  * 5. Products derived from this software may not be called "OpenSSL"
     31  *    nor may "OpenSSL" appear in their names without prior written
     32  *    permission of the OpenSSL Project.
     33  *
     34  * 6. Redistributions of any form whatsoever must retain the following
     35  *    acknowledgment:
     36  *    "This product includes software developed by the OpenSSL Project
     37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
     38  *
     39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
     40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
     43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     50  * OF THE POSSIBILITY OF SUCH DAMAGE.
     51  * ====================================================================
     52  *
     53  * This product includes cryptographic software written by Eric Young
     54  * (eay (at) cryptsoft.com).  This product includes software written by Tim
     55  * Hudson (tjh (at) cryptsoft.com).
     56  *
     57  */
     58 
     59 
     60 #include <stddef.h>
     61 #include "cryptlib.h"
     62 #include <openssl/asn1.h>
     63 #include <openssl/asn1t.h>
     64 #include <openssl/objects.h>
     65 #include <openssl/buffer.h>
     66 #include <openssl/err.h>
     67 #include <openssl/x509v3.h>
     68 #include "asn1_locl.h"
     69 
     70 /* Print routines.
     71  */
     72 
     73 /* ASN1_PCTX routines */
     74 
     75 ASN1_PCTX default_pctx =
     76 	{
     77 	ASN1_PCTX_FLAGS_SHOW_ABSENT,	/* flags */
     78 	0,	/* nm_flags */
     79 	0,	/* cert_flags */
     80 	0,	/* oid_flags */
     81 	0	/* str_flags */
     82 	};
     83 
     84 
     85 ASN1_PCTX *ASN1_PCTX_new(void)
     86 	{
     87 	ASN1_PCTX *ret;
     88 	ret = OPENSSL_malloc(sizeof(ASN1_PCTX));
     89 	if (ret == NULL)
     90 		{
     91 		ASN1err(ASN1_F_ASN1_PCTX_NEW, ERR_R_MALLOC_FAILURE);
     92 		return NULL;
     93 		}
     94 	ret->flags = 0;
     95 	ret->nm_flags = 0;
     96 	ret->cert_flags = 0;
     97 	ret->oid_flags = 0;
     98 	ret->str_flags = 0;
     99 	return ret;
    100 	}
    101 
    102 void ASN1_PCTX_free(ASN1_PCTX *p)
    103 	{
    104 	OPENSSL_free(p);
    105 	}
    106 
    107 unsigned long ASN1_PCTX_get_flags(ASN1_PCTX *p)
    108 	{
    109 	return p->flags;
    110 	}
    111 
    112 void ASN1_PCTX_set_flags(ASN1_PCTX *p, unsigned long flags)
    113 	{
    114 	p->flags = flags;
    115 	}
    116 
    117 unsigned long ASN1_PCTX_get_nm_flags(ASN1_PCTX *p)
    118 	{
    119 	return p->nm_flags;
    120 	}
    121 
    122 void ASN1_PCTX_set_nm_flags(ASN1_PCTX *p, unsigned long flags)
    123 	{
    124 	p->nm_flags = flags;
    125 	}
    126 
    127 unsigned long ASN1_PCTX_get_cert_flags(ASN1_PCTX *p)
    128 	{
    129 	return p->cert_flags;
    130 	}
    131 
    132 void ASN1_PCTX_set_cert_flags(ASN1_PCTX *p, unsigned long flags)
    133 	{
    134 	p->cert_flags = flags;
    135 	}
    136 
    137 unsigned long ASN1_PCTX_get_oid_flags(ASN1_PCTX *p)
    138 	{
    139 	return p->oid_flags;
    140 	}
    141 
    142 void ASN1_PCTX_set_oid_flags(ASN1_PCTX *p, unsigned long flags)
    143 	{
    144 	p->oid_flags = flags;
    145 	}
    146 
    147 unsigned long ASN1_PCTX_get_str_flags(ASN1_PCTX *p)
    148 	{
    149 	return p->str_flags;
    150 	}
    151 
    152 void ASN1_PCTX_set_str_flags(ASN1_PCTX *p, unsigned long flags)
    153 	{
    154 	p->str_flags = flags;
    155 	}
    156 
    157 /* Main print routines */
    158 
    159 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
    160 				const ASN1_ITEM *it,
    161 				const char *fname, const char *sname,
    162 				int nohdr, const ASN1_PCTX *pctx);
    163 
    164 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
    165 				const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx);
    166 
    167 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
    168 				const ASN1_ITEM *it, int indent,
    169 				const char *fname, const char *sname,
    170 				const ASN1_PCTX *pctx);
    171 
    172 static int asn1_print_fsname(BIO *out, int indent,
    173 			const char *fname, const char *sname,
    174 			const ASN1_PCTX *pctx);
    175 
    176 int ASN1_item_print(BIO *out, ASN1_VALUE *ifld, int indent,
    177 				const ASN1_ITEM *it, const ASN1_PCTX *pctx)
    178 	{
    179 	const char *sname;
    180 	if (pctx == NULL)
    181 		pctx = &default_pctx;
    182 	if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
    183 		sname = NULL;
    184 	else
    185 		sname = it->sname;
    186 	return asn1_item_print_ctx(out, &ifld, indent, it,
    187 							NULL, sname, 0, pctx);
    188 	}
    189 
    190 static int asn1_item_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
    191 				const ASN1_ITEM *it,
    192 				const char *fname, const char *sname,
    193 				int nohdr, const ASN1_PCTX *pctx)
    194 	{
    195 	const ASN1_TEMPLATE *tt;
    196 	const ASN1_EXTERN_FUNCS *ef;
    197 	ASN1_VALUE **tmpfld;
    198 	const ASN1_AUX *aux = it->funcs;
    199 	ASN1_aux_cb *asn1_cb;
    200 	ASN1_PRINT_ARG parg;
    201 	int i;
    202 	if (aux && aux->asn1_cb)
    203 		{
    204 		parg.out = out;
    205 		parg.indent = indent;
    206 		parg.pctx = pctx;
    207 		asn1_cb = aux->asn1_cb;
    208 		}
    209 	else asn1_cb = 0;
    210 
    211 	if(*fld == NULL)
    212 		{
    213 		if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_ABSENT)
    214 			{
    215 			if (!nohdr && !asn1_print_fsname(out, indent,
    216 							fname, sname, pctx))
    217 				return 0;
    218 			if (BIO_puts(out, "<ABSENT>\n") <= 0)
    219 				return 0;
    220 			}
    221 		return 1;
    222 		}
    223 
    224 	switch(it->itype)
    225 		{
    226 		case ASN1_ITYPE_PRIMITIVE:
    227 		if(it->templates)
    228 			{
    229 			if (!asn1_template_print_ctx(out, fld, indent,
    230 							it->templates, pctx))
    231 				return 0;
    232 			}
    233 		/* fall thru */
    234 		case ASN1_ITYPE_MSTRING:
    235 		if (!asn1_primitive_print(out, fld, it,
    236 				indent, fname, sname,pctx))
    237 			return 0;
    238 		break;
    239 
    240 		case ASN1_ITYPE_EXTERN:
    241 		if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
    242 			return 0;
    243 		/* Use new style print routine if possible */
    244 		ef = it->funcs;
    245 		if (ef && ef->asn1_ex_print)
    246 			{
    247 			i = ef->asn1_ex_print(out, fld, indent, "", pctx);
    248 			if (!i)
    249 				return 0;
    250 			if ((i == 2) && (BIO_puts(out, "\n") <= 0))
    251 				return 0;
    252 			return 1;
    253 			}
    254 		else if (sname &&
    255 			BIO_printf(out, ":EXTERNAL TYPE %s\n", sname) <= 0)
    256 			return 0;
    257 		break;
    258 
    259 		case ASN1_ITYPE_CHOICE:
    260 #if 0
    261 		if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
    262 			return 0;
    263 #endif
    264 		/* CHOICE type, get selector */
    265 		i = asn1_get_choice_selector(fld, it);
    266 		/* This should never happen... */
    267 		if((i < 0) || (i >= it->tcount))
    268 			{
    269 			if (BIO_printf(out,
    270 				"ERROR: selector [%d] invalid\n", i) <= 0)
    271 				return 0;
    272 			return 1;
    273 			}
    274 		tt = it->templates + i;
    275 		tmpfld = asn1_get_field_ptr(fld, tt);
    276 		if (!asn1_template_print_ctx(out, tmpfld, indent, tt, pctx))
    277 			return 0;
    278 		break;
    279 
    280 		case ASN1_ITYPE_SEQUENCE:
    281 		case ASN1_ITYPE_NDEF_SEQUENCE:
    282 		if (!nohdr && !asn1_print_fsname(out, indent, fname, sname, pctx))
    283 			return 0;
    284 		if (fname || sname)
    285 			{
    286 			if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
    287 				{
    288 				if (BIO_puts(out, " {\n") <= 0)
    289 					return 0;
    290 				}
    291 			else
    292 				{
    293 				if (BIO_puts(out, "\n") <= 0)
    294 					return 0;
    295 				}
    296 			}
    297 
    298 		if (asn1_cb)
    299 			{
    300 			i = asn1_cb(ASN1_OP_PRINT_PRE, fld, it, &parg);
    301 			if (i == 0)
    302 				return 0;
    303 			if (i == 2)
    304 				return 1;
    305 			}
    306 
    307 		/* Print each field entry */
    308 		for(i = 0, tt = it->templates; i < it->tcount; i++, tt++)
    309 			{
    310 			const ASN1_TEMPLATE *seqtt;
    311 			seqtt = asn1_do_adb(fld, tt, 1);
    312 			tmpfld = asn1_get_field_ptr(fld, seqtt);
    313 			if (!asn1_template_print_ctx(out, tmpfld,
    314 						indent + 2, seqtt, pctx))
    315 				return 0;
    316 			}
    317 		if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
    318 			{
    319 			if (BIO_printf(out, "%*s}\n", indent, "") < 0)
    320 				return 0;
    321 			}
    322 
    323 		if (asn1_cb)
    324 			{
    325 			i = asn1_cb(ASN1_OP_PRINT_POST, fld, it, &parg);
    326 			if (i == 0)
    327 				return 0;
    328 			}
    329 		break;
    330 
    331 		default:
    332 		BIO_printf(out, "Unprocessed type %d\n", it->itype);
    333 		return 0;
    334 		}
    335 
    336 	return 1;
    337 	}
    338 
    339 int asn1_template_print_ctx(BIO *out, ASN1_VALUE **fld, int indent,
    340 				const ASN1_TEMPLATE *tt, const ASN1_PCTX *pctx)
    341 	{
    342 	int i, flags;
    343 	const char *sname, *fname;
    344 	flags = tt->flags;
    345 	if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_FIELD_STRUCT_NAME)
    346 		sname = ASN1_ITEM_ptr(tt->item)->sname;
    347 	else
    348 		sname = NULL;
    349 	if(pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
    350 		fname = NULL;
    351 	else
    352 		fname = tt->field_name;
    353 	if(flags & ASN1_TFLG_SK_MASK)
    354 		{
    355 		char *tname;
    356 		ASN1_VALUE *skitem;
    357 		STACK_OF(ASN1_VALUE) *stack;
    358 
    359 		/* SET OF, SEQUENCE OF */
    360 		if (fname)
    361 			{
    362 			if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SSOF)
    363 				{
    364 				if(flags & ASN1_TFLG_SET_OF)
    365 					tname = "SET";
    366 				else
    367 					tname = "SEQUENCE";
    368 				if (BIO_printf(out, "%*s%s OF %s {\n",
    369 					indent, "", tname, tt->field_name) <= 0)
    370 					return 0;
    371 				}
    372 			else if (BIO_printf(out, "%*s%s:\n", indent, "",
    373 					fname) <= 0)
    374 				return 0;
    375 			}
    376 		stack = (STACK_OF(ASN1_VALUE) *)*fld;
    377 		for(i = 0; i < sk_ASN1_VALUE_num(stack); i++)
    378 			{
    379 			if ((i > 0) && (BIO_puts(out, "\n") <= 0))
    380 				return 0;
    381 
    382 			skitem = sk_ASN1_VALUE_value(stack, i);
    383 			if (!asn1_item_print_ctx(out, &skitem, indent + 2,
    384 				ASN1_ITEM_ptr(tt->item), NULL, NULL, 1, pctx))
    385 				return 0;
    386 			}
    387 		if (!i && BIO_printf(out, "%*s<EMPTY>\n", indent + 2, "") <= 0)
    388 				return 0;
    389 		if(pctx->flags & ASN1_PCTX_FLAGS_SHOW_SEQUENCE)
    390 			{
    391 			if (BIO_printf(out, "%*s}\n", indent, "") <= 0)
    392 				return 0;
    393 			}
    394 		return 1;
    395 		}
    396 	return asn1_item_print_ctx(out, fld, indent, ASN1_ITEM_ptr(tt->item),
    397 							fname, sname, 0, pctx);
    398 	}
    399 
    400 static int asn1_print_fsname(BIO *out, int indent,
    401 			const char *fname, const char *sname,
    402 			const ASN1_PCTX *pctx)
    403 	{
    404 	static char spaces[] = "                    ";
    405 	const int nspaces = sizeof(spaces) - 1;
    406 
    407 #if 0
    408 	if (!sname && !fname)
    409 		return 1;
    410 #endif
    411 
    412 	while (indent > nspaces)
    413 		{
    414 		if (BIO_write(out, spaces, nspaces) != nspaces)
    415 			return 0;
    416 		indent -= nspaces;
    417 		}
    418 	if (BIO_write(out, spaces, indent) != indent)
    419 		return 0;
    420 	if (pctx->flags & ASN1_PCTX_FLAGS_NO_STRUCT_NAME)
    421 		sname = NULL;
    422 	if (pctx->flags & ASN1_PCTX_FLAGS_NO_FIELD_NAME)
    423 		fname = NULL;
    424 	if (!sname && !fname)
    425 		return 1;
    426 	if (fname)
    427 		{
    428 		if (BIO_puts(out, fname) <= 0)
    429 			return 0;
    430 		}
    431 	if (sname)
    432 		{
    433 		if (fname)
    434 			{
    435 			if (BIO_printf(out, " (%s)", sname) <= 0)
    436 				return 0;
    437 			}
    438 		else
    439 			{
    440 			if (BIO_puts(out, sname) <= 0)
    441 				return 0;
    442 			}
    443 		}
    444 	if (BIO_write(out, ": ", 2) != 2)
    445 		return 0;
    446 	return 1;
    447 	}
    448 
    449 static int asn1_print_boolean_ctx(BIO *out, int boolval,
    450 							const ASN1_PCTX *pctx)
    451 	{
    452 	const char *str;
    453 	switch (boolval)
    454 		{
    455 		case -1:
    456 		str = "BOOL ABSENT";
    457 		break;
    458 
    459 		case 0:
    460 		str = "FALSE";
    461 		break;
    462 
    463 		default:
    464 		str = "TRUE";
    465 		break;
    466 
    467 		}
    468 
    469 	if (BIO_puts(out, str) <= 0)
    470 		return 0;
    471 	return 1;
    472 
    473 	}
    474 
    475 static int asn1_print_integer_ctx(BIO *out, ASN1_INTEGER *str,
    476 						const ASN1_PCTX *pctx)
    477 	{
    478 	char *s;
    479 	int ret = 1;
    480 	s = i2s_ASN1_INTEGER(NULL, str);
    481 	if (BIO_puts(out, s) <= 0)
    482 		ret = 0;
    483 	OPENSSL_free(s);
    484 	return ret;
    485 	}
    486 
    487 static int asn1_print_oid_ctx(BIO *out, const ASN1_OBJECT *oid,
    488 						const ASN1_PCTX *pctx)
    489 	{
    490 	char objbuf[80];
    491 	const char *ln;
    492 	ln = OBJ_nid2ln(OBJ_obj2nid(oid));
    493 	if(!ln)
    494 		ln = "";
    495 	OBJ_obj2txt(objbuf, sizeof objbuf, oid, 1);
    496 	if (BIO_printf(out, "%s (%s)", ln, objbuf) <= 0)
    497 		return 0;
    498 	return 1;
    499 	}
    500 
    501 static int asn1_print_obstring_ctx(BIO *out, ASN1_STRING *str, int indent,
    502 						const ASN1_PCTX *pctx)
    503 	{
    504 	if (str->type == V_ASN1_BIT_STRING)
    505 		{
    506 		if (BIO_printf(out, " (%ld unused bits)\n",
    507 					str->flags & 0x7) <= 0)
    508 				return 0;
    509 		}
    510 	else if (BIO_puts(out, "\n") <= 0)
    511 		return 0;
    512 	if ((str->length > 0)
    513 		&& BIO_dump_indent(out, (char *)str->data, str->length,
    514 				indent + 2) <= 0)
    515 		return 0;
    516 	return 1;
    517 	}
    518 
    519 static int asn1_primitive_print(BIO *out, ASN1_VALUE **fld,
    520 				const ASN1_ITEM *it, int indent,
    521 				const char *fname, const char *sname,
    522 				const ASN1_PCTX *pctx)
    523 	{
    524 	long utype;
    525 	ASN1_STRING *str;
    526 	int ret = 1, needlf = 1;
    527 	const char *pname;
    528 	const ASN1_PRIMITIVE_FUNCS *pf;
    529 	pf = it->funcs;
    530 	if (!asn1_print_fsname(out, indent, fname, sname, pctx))
    531 			return 0;
    532 	if (pf && pf->prim_print)
    533 		return pf->prim_print(out, fld, it, indent, pctx);
    534 	str = (ASN1_STRING *)*fld;
    535 	if (it->itype == ASN1_ITYPE_MSTRING)
    536 		utype = str->type & ~V_ASN1_NEG;
    537 	else
    538 		utype = it->utype;
    539 	if (utype == V_ASN1_ANY)
    540 		{
    541 		ASN1_TYPE *atype = (ASN1_TYPE *)*fld;
    542 		utype = atype->type;
    543 		fld = &atype->value.asn1_value;
    544 		str = (ASN1_STRING *)*fld;
    545 		if (pctx->flags & ASN1_PCTX_FLAGS_NO_ANY_TYPE)
    546 			pname = NULL;
    547 		else
    548 			pname = ASN1_tag2str(utype);
    549 		}
    550 	else
    551 		{
    552 		if (pctx->flags & ASN1_PCTX_FLAGS_SHOW_TYPE)
    553 			pname = ASN1_tag2str(utype);
    554 		else
    555 			pname = NULL;
    556 		}
    557 
    558 	if (utype == V_ASN1_NULL)
    559 		{
    560 		if (BIO_puts(out, "NULL\n") <= 0)
    561 			return 0;
    562 		return 1;
    563 		}
    564 
    565 	if (pname)
    566 		{
    567 		if (BIO_puts(out, pname) <= 0)
    568 			return 0;
    569 		if (BIO_puts(out, ":") <= 0)
    570 			return 0;
    571 		}
    572 
    573 	switch (utype)
    574 		{
    575 		case V_ASN1_BOOLEAN:
    576 			{
    577 			int boolval = *(int *)fld;
    578 			if (boolval == -1)
    579 				boolval = it->size;
    580 			ret = asn1_print_boolean_ctx(out, boolval, pctx);
    581 			}
    582 		break;
    583 
    584 		case V_ASN1_INTEGER:
    585 		case V_ASN1_ENUMERATED:
    586 		ret = asn1_print_integer_ctx(out, str, pctx);
    587 		break;
    588 
    589 		case V_ASN1_UTCTIME:
    590 		ret = ASN1_UTCTIME_print(out, str);
    591 		break;
    592 
    593 		case V_ASN1_GENERALIZEDTIME:
    594 		ret = ASN1_GENERALIZEDTIME_print(out, str);
    595 		break;
    596 
    597 		case V_ASN1_OBJECT:
    598 		ret = asn1_print_oid_ctx(out, (const ASN1_OBJECT *)*fld, pctx);
    599 		break;
    600 
    601 		case V_ASN1_OCTET_STRING:
    602 		case V_ASN1_BIT_STRING:
    603 		ret = asn1_print_obstring_ctx(out, str, indent, pctx);
    604 		needlf = 0;
    605 		break;
    606 
    607 		case V_ASN1_SEQUENCE:
    608 		case V_ASN1_SET:
    609 		case V_ASN1_OTHER:
    610 		if (BIO_puts(out, "\n") <= 0)
    611 			return 0;
    612 		if (ASN1_parse_dump(out, str->data, str->length,
    613 						indent, 0) <= 0)
    614 			ret = 0;
    615 		needlf = 0;
    616 		break;
    617 
    618 		default:
    619 		ret = ASN1_STRING_print_ex(out, str, pctx->str_flags);
    620 
    621 		}
    622 	if (!ret)
    623 		return 0;
    624 	if (needlf && BIO_puts(out, "\n") <= 0)
    625 		return 0;
    626 	return 1;
    627 	}
    628