1 /* v3_lib.c */

     2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

     3  * project 1999.

     4  */

     5 /* ====================================================================

     6  * Copyright (c) 1999 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@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@cryptsoft.com).  This product includes software written by Tim

    55  * Hudson (tjh@cryptsoft.com).

    56  *

    57  */

    58  /*

    59  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

    60  */

    61 

    62 /* X509 v3 extension utilities */

    63 

    64 #include <stdio.h>

    65 #include "cryptlib.h"

    66 #include <openssl/conf.h>

    67 #include <openssl/x509v3.h>

    68 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

    69 #include "libcrypto_wsd_macros.h"

    70 #include "libcrypto_wsd.h"

    71 #endif

    72 

    73 #include "ext_dat.h"

    74 

    75 #ifndef EMULATOR

    76 static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL;

    77 #else

    78 GET_STATIC_VAR_FROM_TLS(ext_list,v3_lib,STACK_OF(X509V3_EXT_METHOD) *)

    79 #define ext_list (*GET_WSD_VAR_NAME(ext_list,v3_lib, s)())

    80 #endif

    81 

    82 static int ext_cmp(const X509V3_EXT_METHOD * const *a,

    83 		const X509V3_EXT_METHOD * const *b);

    84 static void ext_list_free(X509V3_EXT_METHOD *ext);

    85 

    86 EXPORT_C int X509V3_EXT_add(X509V3_EXT_METHOD *ext)

    87 {

    88 	if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) {

    89 		X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);

    90 		return 0;

    91 	}

    92 	if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {

    93 		X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);

    94 		return 0;

    95 	}

    96 	return 1;

    97 }

    98 

    99 static int ext_cmp(const X509V3_EXT_METHOD * const *a,

   100 		const X509V3_EXT_METHOD * const *b)

   101 {

   102 	return ((*a)->ext_nid - (*b)->ext_nid);

   103 }

   104 

   105 EXPORT_C X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)

   106 {

   107 	X509V3_EXT_METHOD tmp, *t = &tmp, **ret;

   108 	int idx;

   109 	if(nid < 0) return NULL;

   110 	tmp.ext_nid = nid;

   111 	ret = (X509V3_EXT_METHOD **) OBJ_bsearch((char *)&t,

   112 			(char *)standard_exts, STANDARD_EXTENSION_COUNT,

   113 			sizeof(X509V3_EXT_METHOD *), (int (*)(const void *, const void *))ext_cmp);

   114 	if(ret) return *ret;

   115 	if(!ext_list) return NULL;

   116 	idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);

   117 	if(idx == -1) return NULL;

   118 	return sk_X509V3_EXT_METHOD_value(ext_list, idx);

   119 }

   120 

   121 EXPORT_C X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)

   122 {

   123 	int nid;

   124 	if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL;

   125 	return X509V3_EXT_get_nid(nid);

   126 }

   127 

   128 

   129 EXPORT_C int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)

   130 {

   131 	for(;extlist->ext_nid!=-1;extlist++) 

   132 			if(!X509V3_EXT_add(extlist)) return 0;

   133 	return 1;

   134 }

   135 

   136 EXPORT_C int X509V3_EXT_add_alias(int nid_to, int nid_from)

   137 {

   138 	X509V3_EXT_METHOD *ext, *tmpext;

   139 	if(!(ext = X509V3_EXT_get_nid(nid_from))) {

   140 		X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND);

   141 		return 0;

   142 	}

   143 	if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {

   144 		X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE);

   145 		return 0;

   146 	}

   147 	*tmpext = *ext;

   148 	tmpext->ext_nid = nid_to;

   149 	tmpext->ext_flags |= X509V3_EXT_DYNAMIC;

   150 	return X509V3_EXT_add(tmpext);

   151 }

   152 

   153 EXPORT_C void X509V3_EXT_cleanup(void)

   154 {

   155 	sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);

   156 	ext_list = NULL;

   157 }

   158 

   159 static void ext_list_free(X509V3_EXT_METHOD *ext)

   160 {

   161 	if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext);

   162 }

   163 

   164 /* Legacy function: we don't need to add standard extensions

   165  * any more because they are now kept in ext_dat.h.

   166  */

   167 

   168 EXPORT_C int X509V3_add_standard_extensions(void)

   169 {

   170 	return 1;

   171 }

   172 

   173 /* Return an extension internal structure */

   174 

   175 EXPORT_C void *X509V3_EXT_d2i(X509_EXTENSION *ext)

   176 {

   177 	X509V3_EXT_METHOD *method;

   178 	const unsigned char *p;

   179 

   180 	if(!(method = X509V3_EXT_get(ext))) return NULL;

   181 	p = ext->value->data;

   182 	if(method->it) return ASN1_item_d2i(NULL, &p, ext->value->length, ASN1_ITEM_ptr(method->it));

   183 	return method->d2i(NULL, &p, ext->value->length);

   184 }

   185 

   186 /* Get critical flag and decoded version of extension from a NID.

   187  * The "idx" variable returns the last found extension and can

   188  * be used to retrieve multiple extensions of the same NID.

   189  * However multiple extensions with the same NID is usually

   190  * due to a badly encoded certificate so if idx is NULL we

   191  * choke if multiple extensions exist.

   192  * The "crit" variable is set to the critical value.

   193  * The return value is the decoded extension or NULL on

   194  * error. The actual error can have several different causes,

   195  * the value of *crit reflects the cause:

   196  * >= 0, extension found but not decoded (reflects critical value).

   197  * -1 extension not found.

   198  * -2 extension occurs more than once.

   199  */

   200 

   201 EXPORT_C void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx)

   202 {

   203 	int lastpos, i;

   204 	X509_EXTENSION *ex, *found_ex = NULL;

   205 	if(!x) {

   206 		if(idx) *idx = -1;

   207 		if(crit) *crit = -1;

   208 		return NULL;

   209 	}

   210 	if(idx) lastpos = *idx + 1;

   211 	else lastpos = 0;

   212 	if(lastpos < 0) lastpos = 0;

   213 	for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++)

   214 	{

   215 		ex = sk_X509_EXTENSION_value(x, i);

   216 		if(OBJ_obj2nid(ex->object) == nid) {

   217 			if(idx) {

   218 				*idx = i;

   219 				found_ex = ex;

   220 				break;

   221 			} else if(found_ex) {

   222 				/* Found more than one */

   223 				if(crit) *crit = -2;

   224 				return NULL;

   225 			}

   226 			found_ex = ex;

   227 		}

   228 	}

   229 	if(found_ex) {

   230 		/* Found it */

   231 		if(crit) *crit = X509_EXTENSION_get_critical(found_ex);

   232 		return X509V3_EXT_d2i(found_ex);

   233 	}

   234 

   235 	/* Extension not found */

   236 	if(idx) *idx = -1;

   237 	if(crit) *crit = -1;

   238 	return NULL;

   239 }

   240 

   241 /* This function is a general extension append, replace and delete utility.

   242  * The precise operation is governed by the 'flags' value. The 'crit' and

   243  * 'value' arguments (if relevant) are the extensions internal structure.

   244  */

   245 

   246 EXPORT_C int X509V3_add1_i2d(STACK_OF(X509_EXTENSION) **x, int nid, void *value,

   247 					int crit, unsigned long flags)

   248 {

   249 	int extidx = -1;

   250 	int errcode;

   251 	X509_EXTENSION *ext, *extmp;

   252 	unsigned long ext_op = flags & X509V3_ADD_OP_MASK;

   253 

   254 	/* If appending we don't care if it exists, otherwise

   255 	 * look for existing extension.

   256 	 */

   257 	if(ext_op != X509V3_ADD_APPEND)

   258 		extidx = X509v3_get_ext_by_NID(*x, nid, -1);

   259 

   260 	/* See if extension exists */

   261 	if(extidx >= 0) {

   262 		/* If keep existing, nothing to do */

   263 		if(ext_op == X509V3_ADD_KEEP_EXISTING)

   264 			return 1;

   265 		/* If default then its an error */

   266 		if(ext_op == X509V3_ADD_DEFAULT) {

   267 			errcode = X509V3_R_EXTENSION_EXISTS;

   268 			goto err;

   269 		}

   270 		/* If delete, just delete it */

   271 		if(ext_op == X509V3_ADD_DELETE) {

   272 			if(!sk_X509_EXTENSION_delete(*x, extidx)) return -1;

   273 			return 1;

   274 		}

   275 	} else {

   276 		/* If replace existing or delete, error since 

   277 		 * extension must exist

   278 		 */

   279 		if((ext_op == X509V3_ADD_REPLACE_EXISTING) ||

   280 		   (ext_op == X509V3_ADD_DELETE)) {

   281 			errcode = X509V3_R_EXTENSION_NOT_FOUND;

   282 			goto err;

   283 		}

   284 	}

   285 

   286 	/* If we get this far then we have to create an extension:

   287 	 * could have some flags for alternative encoding schemes...

   288 	 */

   289 

   290 	ext = X509V3_EXT_i2d(nid, crit, value);

   291 

   292 	if(!ext) {

   293 		X509V3err(X509V3_F_X509V3_ADD1_I2D, X509V3_R_ERROR_CREATING_EXTENSION);

   294 		return 0;

   295 	}

   296 

   297 	/* If extension exists replace it.. */

   298 	if(extidx >= 0) {

   299 		extmp = sk_X509_EXTENSION_value(*x, extidx);

   300 		X509_EXTENSION_free(extmp);

   301 		if(!sk_X509_EXTENSION_set(*x, extidx, ext)) return -1;

   302 		return 1;

   303 	}

   304 

   305 	if(!*x && !(*x = sk_X509_EXTENSION_new_null())) return -1;

   306 	if(!sk_X509_EXTENSION_push(*x, ext)) return -1;

   307 

   308 	return 1;

   309 

   310 	err:

   311 	if(!(flags & X509V3_ADD_SILENT))

   312 		X509V3err(X509V3_F_X509V3_ADD1_I2D, errcode);

   313 	return 0;

   314 }

   315 

   316 IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)