asn1_compile, made independant from libroken and the rest of the

kerberosV stuff.

Suggested by deraadt@

1 files changed, 267 insertions, 0 deletions

diff --git a/usr.bin/asn1_compile/gen_encode.c b/usr.bin/asn1_compile/gen_encode.c
new file mode 100644
index 00000000000..8e27d5dba4a
--- /dev/null
+++ b/usr.bin/asn1_compile/gen_encode.c
@@ -0,0 +1,267 @@
+/*
+ * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * 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 above 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. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE 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. 
+ */
+
+#include "gen_locl.h"
+
+/*
+RCSID("$KTH: gen_encode.c,v 1.12 2001/09/25 13:39:26 assar Exp $");
+*/
+
+static void
+encode_primitive (const char *typename, const char *name)
+{
+    fprintf (codefile,
+	     "e = encode_%s(p, len, %s, &l);\n"
+	     "BACK;\n",
+	     typename,
+	     name);
+}
+
+static void
+encode_type (const char *name, const Type *t)
+{
+    switch (t->type) {
+    case TType:
+#if 0
+	encode_type (name, t->symbol->type);
+#endif
+	fprintf (codefile,
+		 "e = encode_%s(p, len, %s, &l);\n"
+		 "BACK;\n",
+		 t->symbol->gen_name, name);
+	break;
+    case TInteger:
+	if(t->members == NULL)
+	    encode_primitive ("integer", name);
+	else {
+	    char *s;
+	    asprintf(&s, "(const int*)%s", name);
+	    if(s == NULL)
+		errx(1, "out of memory");
+	    encode_primitive ("integer", s);
+	    free(s);
+	}
+	break;
+    case TUInteger:
+	encode_primitive ("unsigned", name);
+	break;
+    case TOctetString:
+	encode_primitive ("octet_string", name);
+	break;
+    case TOID :
+	encode_primitive ("oid", 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,
+		     7 - 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"
+		 "e = der_put_length_and_tag (p, len, ret, UNIV, PRIM,"
+		 "UT_BitString, &l);\n"
+		 "BACK;\n",
+		 rest);
+	break;
+    }
+    case TEnumerated : {
+	encode_primitive ("enumerated", name);
+	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;
+
+	    asprintf (&s, "%s(%s)->%s", m->optional ? "" : "&", name, m->gen_name);
+	    if (m->optional)
+		fprintf (codefile,
+			 "if(%s)\n",
+			 s);
+#if 1
+	    fprintf (codefile, "{\n"
+		     "int oldret = ret;\n"
+		     "ret = 0;\n");
+#endif
+	    encode_type (s, m->type);
+	    fprintf (codefile,
+		     "e = der_put_length_and_tag (p, len, ret, CONTEXT, CONS, "
+		     "%d, &l);\n"
+		     "BACK;\n",
+		     m->val);
+#if 1
+	    fprintf (codefile,
+		     "ret += oldret;\n"
+		     "}\n");
+#endif
+	    if (tag == -1)
+		tag = m->val;
+	    free (s);
+	}
+	fprintf (codefile,
+		 "e = der_put_length_and_tag (p, len, ret, UNIV, CONS, UT_Sequence, &l);\n"
+		 "BACK;\n");
+	break;
+    }
+    case TSequenceOf: {
+	char *n;
+
+	fprintf (codefile,
+		 "for(i = (%s)->len - 1; i >= 0; --i) {\n"
+#if 1
+		 "int oldret = ret;\n"
+		 "ret = 0;\n",
+#else
+		 ,
+#endif
+		 name);
+	asprintf (&n, "&(%s)->val[i]", name);
+	encode_type (n, t->subtype);
+	fprintf (codefile,
+#if 1
+		 "ret += oldret;\n"
+#endif
+		 "}\n"
+		 "e = der_put_length_and_tag (p, len, ret, UNIV, CONS, UT_Sequence, &l);\n"
+		 "BACK;\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,
+		 "e = der_put_length_and_tag (p, len, ret, APPL, CONS, %d, &l);\n"
+		 "BACK;\n",
+		 t->application);
+	break;
+    default:
+	abort ();
+    }
+}
+
+void
+generate_type_encode (const Symbol *s)
+{
+  fprintf (headerfile,
+	   "int    "
+	   "encode_%s(unsigned char *, size_t, const %s *, size_t *);\n",
+	   s->gen_name, s->gen_name);
+
+  fprintf (codefile, "#define BACK if (e) return e; p -= l; len -= l; ret += l\n\n");
+
+
+  fprintf (codefile, "int\n"
+	   "encode_%s(unsigned char *p, size_t len,"
+	   " const %s *data, size_t *size)\n"
+	   "{\n",
+	   s->gen_name, s->gen_name);
+
+  switch (s->type->type) {
+  case TInteger:
+  case TUInteger:
+  case TOctetString:
+  case TGeneralizedTime:
+  case TGeneralString:
+  case TBitString:
+  case TEnumerated:
+  case TOID:
+  case TSequence:
+  case TSequenceOf:
+  case TApplication:
+  case TType:
+    fprintf (codefile,
+	     "size_t ret = 0;\n"
+	     "size_t l;\n"
+	     "int i, e;\n\n");
+    fprintf(codefile, "i = 0;\n"); /* hack to avoid `unused variable' */
+    
+      encode_type("data", s->type);
+
+    fprintf (codefile, "*size = ret;\n"
+	     "return 0;\n");
+    break;
+  default:
+    abort ();
+  }
+  fprintf (codefile, "}\n\n");
+}