| /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| * All rights reserved. |
| * |
| * This package is an SSL implementation written |
| * by Eric Young (eay@cryptsoft.com). |
| * The implementation was written so as to conform with Netscapes SSL. |
| * |
| * This library is free for commercial and non-commercial use as long as |
| * the following conditions are aheared to. The following conditions |
| * apply to all code found in this distribution, be it the RC4, RSA, |
| * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| * included with this distribution is covered by the same copyright terms |
| * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| * |
| * Copyright remains Eric Young's, and as such any Copyright notices in |
| * the code are not to be removed. |
| * If this package is used in a product, Eric Young should be given attribution |
| * as the author of the parts of the library used. |
| * This can be in the form of a textual message at program startup or |
| * in documentation (online or textual) provided with the package. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * "This product includes cryptographic software written by |
| * Eric Young (eay@cryptsoft.com)" |
| * The word 'cryptographic' can be left out if the rouines from the library |
| * being used are not cryptographic related :-). |
| * 4. If you include any Windows specific code (or a derivative thereof) from |
| * the apps directory (application code) you must include an acknowledgement: |
| * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * The licence and distribution terms for any publically available version or |
| * derivative of this code cannot be changed. i.e. this code cannot simply be |
| * copied and put under another distribution licence |
| * [including the GNU Public Licence.] */ |
| |
| #include <openssl/asn1.h> |
| |
| #include <string.h> |
| |
| #include <openssl/asn1t.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| #include <openssl/err.h> |
| |
| |
| /* Utility functions for manipulating fields and offsets */ |
| |
| /* Add 'offset' to 'addr' */ |
| #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset) |
| |
| /* Given an ASN1_ITEM CHOICE type return the selector value */ |
| int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) { |
| int *sel = offset2ptr(*pval, it->utype); |
| return *sel; |
| } |
| |
| /* Given an ASN1_ITEM CHOICE type set the selector value, return old value. */ |
| int asn1_set_choice_selector(ASN1_VALUE **pval, int value, |
| const ASN1_ITEM *it) { |
| int *sel, ret; |
| sel = offset2ptr(*pval, it->utype); |
| ret = *sel; |
| *sel = value; |
| return ret; |
| } |
| |
| /* Do reference counting. The value 'op' decides what to do. if it is +1 then |
| * the count is incremented. If op is 0 count is set to 1. If op is -1 count is |
| * decremented and the return value is the current refrence count or 0 if no |
| * reference count exists. */ |
| int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) { |
| const ASN1_AUX *aux; |
| int *lck, ret; |
| if (it->itype != ASN1_ITYPE_SEQUENCE && |
| it->itype != ASN1_ITYPE_NDEF_SEQUENCE) { |
| return 0; |
| } |
| aux = it->funcs; |
| if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) { |
| return 0; |
| } |
| lck = offset2ptr(*pval, aux->ref_offset); |
| if (op == 0) { |
| *lck = 1; |
| return 1; |
| } |
| ret = CRYPTO_add(lck, op, aux->ref_lock); |
| return ret; |
| } |
| |
| static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) { |
| const ASN1_AUX *aux; |
| if (!pval || !*pval) { |
| return NULL; |
| } |
| aux = it->funcs; |
| if (!aux || !(aux->flags & ASN1_AFLG_ENCODING)) { |
| return NULL; |
| } |
| return offset2ptr(*pval, aux->enc_offset); |
| } |
| |
| void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) { |
| ASN1_ENCODING *enc; |
| enc = asn1_get_enc_ptr(pval, it); |
| if (enc) { |
| enc->enc = NULL; |
| enc->len = 0; |
| enc->modified = 1; |
| } |
| } |
| |
| void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) { |
| ASN1_ENCODING *enc; |
| enc = asn1_get_enc_ptr(pval, it); |
| if (enc) { |
| if (enc->enc) { |
| OPENSSL_free(enc->enc); |
| } |
| enc->enc = NULL; |
| enc->len = 0; |
| enc->modified = 1; |
| } |
| } |
| |
| int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, |
| const ASN1_ITEM *it) { |
| ASN1_ENCODING *enc; |
| enc = asn1_get_enc_ptr(pval, it); |
| if (!enc) { |
| return 1; |
| } |
| |
| if (enc->enc) { |
| OPENSSL_free(enc->enc); |
| } |
| enc->enc = OPENSSL_malloc(inlen); |
| if (!enc->enc) { |
| return 0; |
| } |
| memcpy(enc->enc, in, inlen); |
| enc->len = inlen; |
| enc->modified = 0; |
| |
| return 1; |
| } |
| |
| int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, |
| const ASN1_ITEM *it) { |
| ASN1_ENCODING *enc; |
| enc = asn1_get_enc_ptr(pval, it); |
| if (!enc || enc->modified) { |
| return 0; |
| } |
| if (out) { |
| memcpy(*out, enc->enc, enc->len); |
| *out += enc->len; |
| } |
| if (len) { |
| *len = enc->len; |
| } |
| return 1; |
| } |
| |
| /* Given an ASN1_TEMPLATE get a pointer to a field */ |
| ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) { |
| ASN1_VALUE **pvaltmp; |
| if (tt->flags & ASN1_TFLG_COMBINE) { |
| return pval; |
| } |
| pvaltmp = offset2ptr(*pval, tt->offset); |
| /* NOTE for BOOLEAN types the field is just a plain int so we can't return |
| * int **, so settle for (int *). */ |
| return pvaltmp; |
| } |
| |
| /* Handle ANY DEFINED BY template, find the selector, look up the relevant |
| * ASN1_TEMPLATE in the table and return it. */ |
| const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, |
| int nullerr) { |
| const ASN1_ADB *adb; |
| const ASN1_ADB_TABLE *atbl; |
| long selector; |
| ASN1_VALUE **sfld; |
| int i; |
| if (!(tt->flags & ASN1_TFLG_ADB_MASK)) { |
| return tt; |
| } |
| |
| /* Else ANY DEFINED BY ... get the table */ |
| adb = ASN1_ADB_ptr(tt->item); |
| |
| /* Get the selector field */ |
| sfld = offset2ptr(*pval, adb->offset); |
| |
| /* Check if NULL */ |
| if (!sfld) { |
| if (!adb->null_tt) { |
| goto err; |
| } |
| return adb->null_tt; |
| } |
| |
| /* Convert type to a long: |
| * NB: don't check for NID_undef here because it |
| * might be a legitimate value in the table */ |
| if (tt->flags & ASN1_TFLG_ADB_OID) { |
| selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld); |
| } else { |
| selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld); |
| } |
| |
| /* Try to find matching entry in table Maybe should check application types |
| * first to allow application override? Might also be useful to have a flag |
| * which indicates table is sorted and we can do a binary search. For now |
| * stick to a linear search. */ |
| |
| for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) { |
| if (atbl->value == selector) { |
| return &atbl->tt; |
| } |
| } |
| |
| /* FIXME: need to search application table too */ |
| |
| /* No match, return default type */ |
| if (!adb->default_tt) { |
| goto err; |
| } |
| return adb->default_tt; |
| |
| err: |
| /* FIXME: should log the value or OID of unsupported type */ |
| if (nullerr) { |
| OPENSSL_PUT_ERROR(ASN1, asn1_do_adb, |
| ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE); |
| } |
| return NULL; |
| } |