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fad81ed299bd837024dabe20b18470633ab79f3d
heimdal/lib/asn1/gen.c
Johan Danielsson fad81ed299 Lots of random changes. 
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@1107 ec53bebd-3082-4978-b11e-865c3cabbd6b
1996-12-15 21:30:34 +00:00

646 lines
14 KiB
C
Raw Blame History

/* $Id$ */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "der.h"
#include "gen.h"
FILE *headerfile, *codefile;
#define STEM "asn1"
void
init_generate (char *filename)
{
headerfile = fopen (STEM ".h", "w");
fprintf (headerfile,
"/* Generated from %s */\n"
"/* Do not edit */\n\n",
filename);
codefile = fopen (STEM ".c", "w");
fprintf (codefile,
"/* Generated from %s */\n"
"/* Do not edit */\n\n"
"#include <stdio.h>\n"
"#include <stdlib.h>\n"
"#include <time.h>\n"
"#include <der.h>\n"
"#include <" STEM ".h>\n\n",
filename);
}
void
close_generate ()
{
fclose (headerfile);
fclose (codefile);
}
void
generate_constant (Symbol *s)
{
fprintf (headerfile, "enum { %s = %d };\n\n",
s->gen_name, s->constant);
}
static void
define_type (char *name, Type *t)
{
switch (t->type) {
case TType:
fprintf (headerfile, "%s %s;\n", t->symbol->gen_name, name);
break;
case TInteger:
fprintf (headerfile, "int %s;\n", name);
break;
case TOctetString:
fprintf (headerfile, "krb5_data %s;\n", name);
break;
case TBitString: {
Member *m;
Type i;
int tag = -1;
i.type = TInteger;
fprintf (headerfile, "struct {\n");
for (m = t->members; m && m->val != tag; m = m->next) {
char *n = malloc(strlen(m->gen_name) + 3);
strcpy (n, m->gen_name);
strcat (n, ":1");
define_type (n, &i);
free (n);
if (tag == -1)
tag = m->val;
}
fprintf (headerfile, "} %s;\n\n", name);
break;
}
case TSequence: {
Member *m;
int tag = -1;
fprintf (headerfile, "struct {\n");
for (m = t->members; m && m->val != tag; m = m->next) {
if (m->optional) {
char *n = malloc(strlen(m->gen_name) + 2);
*n = '*';
strcpy (n+1, m->gen_name);
define_type (n, m->type);
free (n);
} else
define_type (m->gen_name, m->type);
if (tag == -1)
tag = m->val;
}
fprintf (headerfile, "} %s;\n\n", name);
break;
}
case TSequenceOf: {
Type i;
i.type = TInteger;
i.application = 0;
fprintf (headerfile, "struct {\n");
define_type ("len", &i);
define_type ("*val", t->subtype);
fprintf (headerfile, "} %s;\n\n", name);
break;
}
case TGeneralizedTime:
fprintf (headerfile, "time_t %s;\n", name);
break;
case TGeneralString:
fprintf (headerfile, "char *%s;\n", name);
break;
case TApplication:
define_type (name, t->subtype);
break;
default:
abort ();
}
}
static void
generate_type_header (Symbol *s)
{
fprintf (headerfile, "typedef ");
define_type (s->gen_name, s->type);
fprintf (headerfile, "\n");
}
static void
encode_primitive (char *typename, char *name)
{
fprintf (codefile,
"l = encode_%s(p, len, %s);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n",
typename,
name);
}
static void
encode_type (char *name, Type *t)
{
switch (t->type) {
case TType:
#if 0
encode_type (name, t->symbol->type);
#endif
fprintf (codefile,
"l = encode_%s(p, len, %s);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n",
t->symbol->gen_name, name);
break;
case TInteger:
encode_primitive ("integer", name);
break;
case TOctetString:
encode_primitive ("octet_string", name);
break;
case TBitString: {
Member *m;
int pos;
int rest;
int tag = -1;
if (t->members == NULL)
break;
fprintf (codefile, "{\n"
"unsigned char c = 0;\n");
pos = t->members->prev->val;
/* fix for buggy MIT (and OSF?) code */
if (pos > 31)
abort ();
/*
* It seems that if we do not always set pos to 31 here, the MIT
* code will do the wrong thing.
*
* I hate ASN.1 (and DER), but I hate it even more when everybody
* has to screw it up differently.
*/
pos = 31;
rest = 7 - (pos % 8);
for (m = t->members->prev; m && tag != m->val; m = m->prev) {
while (m->val / 8 < pos / 8) {
fprintf (codefile,
"*p-- = c; len--; ret++;\n"
"c = 0;\n");
pos -= 8;
}
fprintf (codefile,
"if(%s->%s) c |= 1<<%d;\n", name, m->gen_name,
m->val % 8);
if (tag == -1)
tag = m->val;
}
fprintf (codefile,
"*p-- = c;\n"
"*p-- = %d;\n"
"len -= 2;\n"
"ret += 2;\n"
"}\n\n"
"l = der_put_length (p, len, ret);\n"
"if(l < 0)\n"
" return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n"
"l = der_put_tag (p, len, UNIV, PRIM, UT_BitString);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n",
rest);
break;
}
case TSequence: {
Member *m;
int tag = -1;
if (t->members == NULL)
break;
for (m = t->members->prev; m && tag != m->val; m = m->prev) {
char *s = malloc(2 + strlen(name) + 1 + strlen(m->gen_name) + 3);
sprintf (s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
if (m->optional)
fprintf (codefile,
"if(%s)\n",
s);
fprintf (codefile, "{\n"
"int oldret = ret;\n"
"ret = 0;\n");
encode_type (s, m->type);
fprintf (codefile,
"l = der_put_length (p, len, ret);\n"
"if (l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n"
"l = der_put_tag (p, len, CONTEXT, CONS, %d);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n",
m->val);
fprintf (codefile,
"ret += oldret;\n"
"}\n");
if (tag == -1)
tag = m->val;
free (s);
}
fprintf (codefile,
"l = der_put_length (p, len, ret);\n"
"if(l < 0)\n"
" return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n"
"l = der_put_tag (p, len, UNIV, CONS, UT_Sequence);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n");
break;
}
case TSequenceOf: {
char *n = malloc(strlen(name) + 12);
fprintf (codefile,
"for(i = (%s)->len - 1; i >= 0; --i) {\n"
"int oldret = ret;\n"
"ret = 0;\n",
name);
sprintf (n, "&(%s)->val[i]", name);
encode_type (n, t->subtype);
fprintf (codefile,
"ret += oldret;\n"
"}\n"
"l = der_put_length (p, len, ret);\n"
"if(l < 0)\n"
" return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n"
"l = der_put_tag (p, len, UNIV, CONS, UT_Sequence);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n");
free (n);
break;
}
case TGeneralizedTime:
encode_primitive ("generalized_time", name);
break;
case TGeneralString:
encode_primitive ("general_string", name);
break;
case TApplication:
encode_type (name, t->subtype);
fprintf (codefile,
"l = der_put_length (p, len, ret);\n"
"if(l < 0)\n"
" return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n"
"l = der_put_tag (p, len, APPL, CONS, %d);\n"
"if(l < 0)\n"
"return l;\n"
"p -= l;\n"
"len -= l;\n"
"ret += l;\n\n",
t->application);
break;
default:
abort ();
}
}
static void
generate_type_encode (Symbol *s)
{
fprintf (headerfile,
"int encode_%s(unsigned char *, int, void *);\n",
s->gen_name);
fprintf (codefile, "int\n"
"encode_%s(unsigned char *p, int len, void *d)\n"
"{\n"
"%s *data = (%s *)d;\n"
"int ret = 0;\n"
"int l, i;\n\n",
s->gen_name, s->gen_name, s->gen_name);
encode_type ("data", s->type);
fprintf (codefile, "return ret;\n"
"}\n\n");
}
static void
decode_primitive (char *typename, char *name)
{
fprintf (codefile,
"l = decode_%s(p, len, %s);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n\n",
typename,
name);
}
static void
decode_type (char *name, Type *t)
{
switch (t->type) {
case TType:
#if 0
decode_type (name, t->symbol->type);
#endif
fprintf (codefile,
"l = decode_%s(p, len, %s);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n\n",
t->symbol->gen_name, name);
break;
case TInteger:
decode_primitive ("integer", name);
break;
case TOctetString:
decode_primitive ("octet_string", name);
break;
case TBitString:
/* XXX */
fprintf (codefile,
"l = der_match_tag (p, len, UNIV, PRIM, UT_BitString);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length (p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"if(len < reallen)\n"
"return -1;\n"
"p += reallen;\n"
"len -= reallen;\n"
"ret += reallen;\n");
break;
case TSequence: {
Member *m;
int tag = -1;
if (t->members == NULL)
break;
fprintf (codefile,
"l = der_match_tag (p, len, UNIV, CONS, UT_Sequence);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length (p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"{\n"
"int dce_fix = 0;\n"
"if(reallen == 0)\n"
"dce_fix = 1;\n"
"if(!dce_fix && len < reallen)\n"
"return -1;\n"
"if(!dce_fix)\n"
"len = reallen;\n");
for (m = t->members; m && tag != m->val; m = m->next) {
char *s = malloc(2 + strlen(name) + 1 + strlen(m->gen_name) + 3);
sprintf (s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
fprintf (codefile, "{\n"
"int newlen, oldlen;\n\n"
"l = der_match_tag (p, len, CONTEXT, CONS, %d);\n",
m->val);
fprintf (codefile,
"if(l >= 0) {\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length (p, len, &newlen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"{\n"
"int dce_fix = 0;\n"
"if(newlen == 0)\n"
"dce_fix = 1;\n"
"if(!dce_fix && len < newlen)\n"
"return -1;\n"
"oldlen = len;\n"
"if(!dce_fix)\n"
"len = newlen;\n");
if (m->optional)
fprintf (codefile,
"%s = malloc(sizeof(*%s));\n",
s, s);
decode_type (s, m->type);
fprintf (codefile,
"if(dce_fix){\n"
"l = der_match_tag (p, len, 0, 0, 0);\n"
"if(l < 0) return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length(p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"}else \n"
"len = oldlen - newlen;\n"
"}\n"
"}\n"
"else {\n");
if(m->optional)
fprintf (codefile,
"%s = NULL;\n"
"}\n", s);
else
fprintf (codefile,
"return l;\n"
"}\n");
fprintf (codefile,
"}\n");
if (tag == -1)
tag = m->val;
free (s);
}
fprintf(codefile,
"if(dce_fix){\n"
"l = der_match_tag (p, len, 0, 0, 0);\n"
"if(l < 0) return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length(p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"}\n"
"}\n");
break;
}
case TSequenceOf: {
char *n = malloc(2*strlen(name) + 20);
fprintf (codefile,
"l = der_match_tag (p, len, UNIV, CONS, UT_Sequence);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length (p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"if(len < reallen)\n"
"return -1;\n"
"len = reallen;\n");
fprintf (codefile,
"(%s)->len = 0;\n"
"(%s)->val = NULL;\n"
"while(len > 0) {\n"
"(%s)->len++;\n"
"(%s)->val = realloc((%s)->val, sizeof(*((%s)->val)) * (%s)->len);\n",
name, name, name, name, name, name, name);
sprintf (n, "&(%s)->val[(%s)->len-1]", name, name);
decode_type (n, t->subtype);
fprintf (codefile,
"}\n");
free (n);
break;
}
case TGeneralizedTime:
decode_primitive ("generalized_time", name);
break;
case TGeneralString:
decode_primitive ("general_string", name);
break;
case TApplication:
fprintf (codefile,
"l = der_match_tag (p, len, APPL, CONS, %d);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length(p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"{\n"
"int dce_fix = 0;\n"
"if(reallen == 0)\n"
"dce_fix = 1;\n"
"if(!dce_fix && len < reallen)\n"
"return -1;\n"
"if(!dce_fix)\n"
"len = reallen;\n",
t->application);
decode_type (name, t->subtype);
fprintf(codefile,
"if(dce_fix){\n"
"l = der_match_tag (p, len, 0, 0, 0);\n"
"if(l < 0) return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"l = der_get_length(p, len, &reallen);\n"
"if(l < 0)\n"
"return l;\n"
"p += l;\n"
"len -= l;\n"
"ret += l;\n"
"}\n"
"}\n");
break;
default :
abort ();
}
}
static void
generate_type_decode (Symbol *s)
{
fprintf (headerfile,
"int decode_%s(unsigned char *, int, void *);\n",
s->gen_name);
fprintf (codefile, "int\n"
"decode_%s(unsigned char *p, int len, void *d)\n"
"{\n"
"%s *data = (%s *)d;\n"
"int ret = 0, reallen;\n"
"int l, i;\n\n",
s->gen_name, s->gen_name, s->gen_name);
decode_type ("data", s->type);
fprintf (codefile, "return ret;\n"
"}\n\n");
}
void
generate_type (Symbol *s)
{
generate_type_header (s);
generate_type_encode (s);
generate_type_decode (s);
}
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