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| 1 /* tasn_utl.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project 2000. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 2000-2004 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 | |
| 60 #include <stddef.h> | |
| 61 #include <string.h> | |
| 62 #include <openssl/asn1.h> | |
| 63 #include <openssl/asn1t.h> | |
| 64 #include <openssl/objects.h> | |
| 65 #include <openssl/err.h> | |
| 66 | |
| 67 /* Utility functions for manipulating fields and offsets */ | |
| 68 | |
| 69 /* Add 'offset' to 'addr' */ | |
| 70 #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset) | |
| 71 | |
| 72 /* Given an ASN1_ITEM CHOICE type return | |
| 73 * the selector value | |
| 74 */ | |
| 75 | |
| 76 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
| 77 { | |
| 78 int *sel = offset2ptr(*pval, it->utype); | |
| 79 return *sel; | |
| 80 } | |
| 81 | |
| 82 /* Given an ASN1_ITEM CHOICE type set | |
| 83 * the selector value, return old value. | |
| 84 */ | |
| 85 | |
| 86 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it) | |
| 87 { | |
| 88 int *sel, ret; | |
| 89 sel = offset2ptr(*pval, it->utype); | |
| 90 ret = *sel; | |
| 91 *sel = value; | |
| 92 return ret; | |
| 93 } | |
| 94 | |
| 95 /* Do reference counting. The value 'op' decides what to do. | |
| 96 * if it is +1 then the count is incremented. If op is 0 count is | |
| 97 * set to 1. If op is -1 count is decremented and the return value | |
| 98 * is the current refrence count or 0 if no reference count exists. | |
| 99 */ | |
| 100 | |
| 101 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) | |
| 102 { | |
| 103 const ASN1_AUX *aux; | |
| 104 int *lck, ret; | |
| 105 if ((it->itype != ASN1_ITYPE_SEQUENCE) | |
| 106 && (it->itype != ASN1_ITYPE_NDEF_SEQUENCE)) | |
| 107 return 0; | |
| 108 aux = it->funcs; | |
| 109 if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) | |
| 110 return 0; | |
| 111 lck = offset2ptr(*pval, aux->ref_offset); | |
| 112 if (op == 0) | |
| 113 { | |
| 114 *lck = 1; | |
| 115 return 1; | |
| 116 } | |
| 117 ret = CRYPTO_add(lck, op, aux->ref_lock); | |
| 118 #ifdef REF_PRINT | |
| 119 fprintf(stderr, "%s: Reference Count: %d\n", it->sname, *lck); | |
| 120 #endif | |
| 121 #ifdef REF_CHECK | |
| 122 if (ret < 0) | |
| 123 fprintf(stderr, "%s, bad reference count\n", it->sname); | |
| 124 #endif | |
| 125 return ret; | |
| 126 } | |
| 127 | |
| 128 static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
| 129 { | |
| 130 const ASN1_AUX *aux; | |
| 131 if (!pval || !*pval) | |
| 132 return NULL; | |
| 133 aux = it->funcs; | |
| 134 if (!aux || !(aux->flags & ASN1_AFLG_ENCODING)) | |
| 135 return NULL; | |
| 136 return offset2ptr(*pval, aux->enc_offset); | |
| 137 } | |
| 138 | |
| 139 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
| 140 { | |
| 141 ASN1_ENCODING *enc; | |
| 142 enc = asn1_get_enc_ptr(pval, it); | |
| 143 if (enc) | |
| 144 { | |
| 145 enc->enc = NULL; | |
| 146 enc->len = 0; | |
| 147 enc->modified = 1; | |
| 148 } | |
| 149 } | |
| 150 | |
| 151 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
| 152 { | |
| 153 ASN1_ENCODING *enc; | |
| 154 enc = asn1_get_enc_ptr(pval, it); | |
| 155 if (enc) | |
| 156 { | |
| 157 if (enc->enc) | |
| 158 OPENSSL_free(enc->enc); | |
| 159 enc->enc = NULL; | |
| 160 enc->len = 0; | |
| 161 enc->modified = 1; | |
| 162 } | |
| 163 } | |
| 164 | |
| 165 int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, | |
| 166 const ASN1_ITEM *it) | |
| 167 { | |
| 168 ASN1_ENCODING *enc; | |
| 169 enc = asn1_get_enc_ptr(pval, it); | |
| 170 if (!enc) | |
| 171 return 1; | |
| 172 | |
| 173 if (enc->enc) | |
| 174 OPENSSL_free(enc->enc); | |
| 175 enc->enc = OPENSSL_malloc(inlen); | |
| 176 if (!enc->enc) | |
| 177 return 0; | |
| 178 memcpy(enc->enc, in, inlen); | |
| 179 enc->len = inlen; | |
| 180 enc->modified = 0; | |
| 181 | |
| 182 return 1; | |
| 183 } | |
| 184 | |
| 185 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, | |
| 186 const ASN1_ITEM *it) | |
| 187 { | |
| 188 ASN1_ENCODING *enc; | |
| 189 enc = asn1_get_enc_ptr(pval, it); | |
| 190 if (!enc || enc->modified) | |
| 191 return 0; | |
| 192 if (out) | |
| 193 { | |
| 194 memcpy(*out, enc->enc, enc->len); | |
| 195 *out += enc->len; | |
| 196 } | |
| 197 if (len) | |
| 198 *len = enc->len; | |
| 199 return 1; | |
| 200 } | |
| 201 | |
| 202 /* Given an ASN1_TEMPLATE get a pointer to a field */ | |
| 203 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) | |
| 204 { | |
| 205 ASN1_VALUE **pvaltmp; | |
| 206 if (tt->flags & ASN1_TFLG_COMBINE) | |
| 207 return pval; | |
| 208 pvaltmp = offset2ptr(*pval, tt->offset); | |
| 209 /* NOTE for BOOLEAN types the field is just a plain | |
| 210 * int so we can't return int **, so settle for | |
| 211 * (int *). | |
| 212 */ | |
| 213 return pvaltmp; | |
| 214 } | |
| 215 | |
| 216 /* Handle ANY DEFINED BY template, find the selector, look up | |
| 217 * the relevant ASN1_TEMPLATE in the table and return it. | |
| 218 */ | |
| 219 | |
| 220 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, | |
| 221 int nullerr) | |
| 222 { | |
| 223 const ASN1_ADB *adb; | |
| 224 const ASN1_ADB_TABLE *atbl; | |
| 225 long selector; | |
| 226 ASN1_VALUE **sfld; | |
| 227 int i; | |
| 228 if (!(tt->flags & ASN1_TFLG_ADB_MASK)) | |
| 229 return tt; | |
| 230 | |
| 231 /* Else ANY DEFINED BY ... get the table */ | |
| 232 adb = ASN1_ADB_ptr(tt->item); | |
| 233 | |
| 234 /* Get the selector field */ | |
| 235 sfld = offset2ptr(*pval, adb->offset); | |
| 236 | |
| 237 /* Check if NULL */ | |
| 238 if (!sfld) | |
| 239 { | |
| 240 if (!adb->null_tt) | |
| 241 goto err; | |
| 242 return adb->null_tt; | |
| 243 } | |
| 244 | |
| 245 /* Convert type to a long: | |
| 246 * NB: don't check for NID_undef here because it | |
| 247 * might be a legitimate value in the table | |
| 248 */ | |
| 249 if (tt->flags & ASN1_TFLG_ADB_OID) | |
| 250 selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld); | |
| 251 else | |
| 252 selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld); | |
| 253 | |
| 254 /* Try to find matching entry in table | |
| 255 * Maybe should check application types first to | |
| 256 * allow application override? Might also be useful | |
| 257 * to have a flag which indicates table is sorted and | |
| 258 * we can do a binary search. For now stick to a | |
| 259 * linear search. | |
| 260 */ | |
| 261 | |
| 262 for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) | |
| 263 if (atbl->value == selector) | |
| 264 return &atbl->tt; | |
| 265 | |
| 266 /* FIXME: need to search application table too */ | |
| 267 | |
| 268 /* No match, return default type */ | |
| 269 if (!adb->default_tt) | |
| 270 goto err; | |
| 271 return adb->default_tt; | |
| 272 | |
| 273 err: | |
| 274 /* FIXME: should log the value or OID of unsupported type */ | |
| 275 if (nullerr) | |
| 276 ASN1err(ASN1_F_ASN1_DO_ADB, | |
| 277 ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); | |
| 278 return NULL; | |
| 279 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master