823fb82477
This option, `--decorate=TYPE-NAME:FIELD-TYPE:field-name[?]` allows one to add a field to any struct generated by the ASN.1 compiler for any SET or SEQUENCE type such that: - the field will be freed by the `free_TYPE_NAME()` function - the field will be copied by the `copy_TYPE_NAME()` function - the field will not be printed by the `print_TYPE_NAME()` function - the field will NOT be encoded or decoded This is useful for internal bookkeeping. The first use of this may well be for adding an optional field to `Principal` where information about name attributes will be stored, which will then allow us to have GSS name attributes for the krb5 mechanism w/o having to refactor the mechanism to use a different structure for representing `gss_name_t` mechnames than the one currently used (`Principal`; `krb5_principal` happens to be a typedef alias of `Principal *`). So w/o massive rototilling of the GSS krb5 mechanism we can have name attributes, _and_ we'll also be able to have those in the krb5 API as well w/o any massive rototilling there either.
270 lines
7.3 KiB
C
270 lines
7.3 KiB
C
/*
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* Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "gen_locl.h"
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RCSID("$Id$");
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static int used_fail;
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static void
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copy_primitive (const char *typename, const char *from, const char *to)
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{
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fprintf (codefile, "if(der_copy_%s(%s, %s)) goto fail;\n",
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typename, from, to);
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used_fail++;
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}
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static void
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copy_type (const char *from, const char *to, const Type *t, int preserve)
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{
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switch (t->type) {
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case TType:
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#if 0
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copy_type (from, to, t->symbol->type, preserve);
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#endif
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fprintf (codefile, "if(copy_%s(%s, %s)) goto fail;\n",
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t->symbol->gen_name, from, to);
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used_fail++;
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break;
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case TInteger:
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if (t->range == NULL && t->members == NULL) {
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copy_primitive ("heim_integer", from, to);
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break;
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}
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/* FALLTHROUGH */
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case TBoolean:
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case TEnumerated :
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fprintf(codefile, "*(%s) = *(%s);\n", to, from);
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break;
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case TOctetString:
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copy_primitive ("octet_string", from, to);
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break;
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case TBitString:
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if (HEIM_TAILQ_EMPTY(t->members))
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copy_primitive ("bit_string", from, to);
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else
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fprintf(codefile, "*(%s) = *(%s);\n", to, from);
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break;
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case TSet:
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case TSequence:
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case TChoice: {
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Member *m, *have_ellipsis = NULL;
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if(t->members == NULL)
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break;
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if ((t->type == TSequence || t->type == TChoice) && preserve) {
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fprintf(codefile,
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"{ int ret;\n"
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"ret = der_copy_octet_string(&(%s)->_save, &(%s)->_save);\n"
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"if (ret) goto fail;\n"
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"}\n",
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from, to);
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used_fail++;
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}
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if(t->type == TChoice) {
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fprintf(codefile, "(%s)->element = (%s)->element;\n", to, from);
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fprintf(codefile, "switch((%s)->element) {\n", from);
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}
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HEIM_TAILQ_FOREACH(m, t->members, members) {
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char *fs;
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char *ts;
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if (m->ellipsis) {
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have_ellipsis = m;
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continue;
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}
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if(t->type == TChoice)
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fprintf(codefile, "case %s:\n", m->label);
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if (asprintf (&fs, "%s(%s)->%s%s",
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m->optional ? "" : "&", from,
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t->type == TChoice ? "u." : "", m->gen_name) < 0)
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errx(1, "malloc");
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if (fs == NULL)
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errx(1, "malloc");
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if (asprintf (&ts, "%s(%s)->%s%s",
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m->optional ? "" : "&", to,
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t->type == TChoice ? "u." : "", m->gen_name) < 0)
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errx(1, "malloc");
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if (ts == NULL)
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errx(1, "malloc");
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if(m->optional){
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fprintf(codefile, "if(%s) {\n", fs);
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fprintf(codefile, "%s = malloc(sizeof(*%s));\n", ts, ts);
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fprintf(codefile, "if(%s == NULL) goto fail;\n", ts);
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used_fail++;
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}
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copy_type (fs, ts, m->type, FALSE);
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if(m->optional){
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fprintf(codefile, "}else\n");
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fprintf(codefile, "%s = NULL;\n", ts);
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}
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free (fs);
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free (ts);
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if(t->type == TChoice)
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fprintf(codefile, "break;\n");
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}
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if(t->type == TChoice) {
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if (have_ellipsis) {
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fprintf(codefile, "case %s: {\n"
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"int ret;\n"
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"ret=der_copy_octet_string(&(%s)->u.%s, &(%s)->u.%s);\n"
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"if (ret) goto fail;\n"
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"break;\n"
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"}\n",
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have_ellipsis->label,
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from, have_ellipsis->gen_name,
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to, have_ellipsis->gen_name);
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used_fail++;
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}
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fprintf(codefile, "}\n");
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}
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break;
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}
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case TSetOf:
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case TSequenceOf: {
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char *f = NULL, *T = NULL;
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fprintf (codefile, "if(((%s)->val = "
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"malloc((%s)->len * sizeof(*(%s)->val))) == NULL && (%s)->len != 0)\n",
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to, from, to, from);
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fprintf (codefile, "goto fail;\n");
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used_fail++;
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fprintf(codefile,
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"for((%s)->len = 0; (%s)->len < (%s)->len; (%s)->len++){\n",
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to, to, from, to);
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if (asprintf(&f, "&(%s)->val[(%s)->len]", from, to) < 0)
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errx(1, "malloc");
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if (f == NULL)
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errx(1, "malloc");
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if (asprintf(&T, "&(%s)->val[(%s)->len]", to, to) < 0)
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errx(1, "malloc");
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if (T == NULL)
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errx(1, "malloc");
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copy_type(f, T, t->subtype, FALSE);
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fprintf(codefile, "}\n");
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free(f);
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free(T);
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break;
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}
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case TGeneralizedTime:
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fprintf(codefile, "*(%s) = *(%s);\n", to, from);
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break;
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case TGeneralString:
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copy_primitive ("general_string", from, to);
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break;
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case TTeletexString:
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copy_primitive ("general_string", from, to);
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break;
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case TUTCTime:
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fprintf(codefile, "*(%s) = *(%s);\n", to, from);
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break;
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case TUTF8String:
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copy_primitive ("utf8string", from, to);
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break;
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case TPrintableString:
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copy_primitive ("printable_string", from, to);
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break;
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case TIA5String:
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copy_primitive ("ia5_string", from, to);
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break;
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case TBMPString:
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copy_primitive ("bmp_string", from, to);
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break;
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case TUniversalString:
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copy_primitive ("universal_string", from, to);
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break;
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case TVisibleString:
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copy_primitive ("visible_string", from, to);
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break;
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case TTag:
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copy_type (from, to, t->subtype, preserve);
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break;
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case TOID:
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copy_primitive ("oid", from, to);
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break;
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case TNull:
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break;
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default :
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abort ();
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}
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}
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void
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generate_type_copy (const Symbol *s)
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{
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int preserve = preserve_type(s->name) ? TRUE : FALSE;
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int save_used_fail = used_fail;
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int deco_opt;
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char *ft, *fn;
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used_fail = 0;
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fprintf (codefile, "int ASN1CALL\n"
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"copy_%s(const %s *from, %s *to)\n"
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"{\n"
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"memset(to, 0, sizeof(*to));\n",
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s->gen_name, s->gen_name, s->gen_name);
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copy_type ("from", "to", s->type, preserve);
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if (decorate_type(s->gen_name, &ft, &fn, &deco_opt)) {
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if (deco_opt) {
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fprintf(codefile, "if (from->%s) {\n", fn);
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fprintf(codefile, "(to)->%s = malloc(sizeof(*(to)->%s));\n", fn, fn);
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fprintf(codefile, "if (copy_%s((from)->%s, (to)->%s)) goto fail;\n", ft, fn, fn);
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fprintf(codefile, "}\n");
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} else {
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fprintf(codefile, "if (copy_%s(&(from)->%s, &(to)->%s)) goto fail;\n", ft, fn, fn);
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}
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used_fail++;
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free(ft);
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free(fn);
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}
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fprintf (codefile, "return 0;\n");
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if (used_fail)
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fprintf (codefile, "fail:\n"
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"free_%s(to);\n"
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"return ENOMEM;\n",
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s->gen_name);
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fprintf(codefile,
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"}\n\n");
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used_fail = save_used_fail;
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}
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