diff options
Diffstat (limited to 'crypto/heimdal/lib/asn1/gen_length.c')
| -rw-r--r-- | crypto/heimdal/lib/asn1/gen_length.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/asn1/gen_length.c b/crypto/heimdal/lib/asn1/gen_length.c new file mode 100644 index 000000000000..1c3566d0f3c0 --- /dev/null +++ b/crypto/heimdal/lib/asn1/gen_length.c @@ -0,0 +1,153 @@ +/* + * Copyright (c) 1997 - 1999 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("$Id: gen_length.c,v 1.7 1999/12/02 17:05:02 joda Exp $"); + +static void +length_primitive (const char *typename, + const char *name, + const char *variable) +{ + fprintf (codefile, "%s += length_%s(%s);\n", variable, typename, name); +} + +static void +length_type (const char *name, const Type *t, const char *variable) +{ + switch (t->type) { + case TType: +#if 0 + length_type (name, t->symbol->type); +#endif + fprintf (codefile, "%s += length_%s(%s);\n", + variable, t->symbol->gen_name, name); + break; + case TInteger: + length_primitive ("integer", name, variable); + break; + case TOctetString: + length_primitive ("octet_string", name, variable); + break; + case TBitString: { + /* + * XXX - Hope this is correct + * look at TBitString case in `encode_type' + */ + fprintf (codefile, "%s += 7;\n", variable); + break; + } + case TSequence: { + Member *m; + int tag = -1; + + if (t->members == NULL) + break; + + for (m = t->members; m && tag != m->val; m = m->next) { + char *s; + + asprintf (&s, "%s(%s)->%s", + m->optional ? "" : "&", name, m->gen_name); + if (m->optional) + fprintf (codefile, "if(%s)", s); + fprintf (codefile, "{\n" + "int oldret = %s;\n" + "%s = 0;\n", variable, variable); + length_type (s, m->type, "ret"); + fprintf (codefile, "%s += 1 + length_len(%s) + oldret;\n", + variable, variable); + fprintf (codefile, "}\n"); + if (tag == -1) + tag = m->val; + free (s); + } + fprintf (codefile, + "%s += 1 + length_len(%s);\n", variable, variable); + break; + } + case TSequenceOf: { + char *n; + + fprintf (codefile, + "{\n" + "int oldret = %s;\n" + "int i;\n" + "%s = 0;\n", + variable, variable); + + fprintf (codefile, "for(i = (%s)->len - 1; i >= 0; --i){\n", name); + asprintf (&n, "&(%s)->val[i]", name); + length_type(n, t->subtype, variable); + fprintf (codefile, "}\n"); + + fprintf (codefile, + "%s += 1 + length_len(%s) + oldret;\n" + "}\n", variable, variable); + free(n); + break; + } + case TGeneralizedTime: + length_primitive ("generalized_time", name, variable); + break; + case TGeneralString: + length_primitive ("general_string", name, variable); + break; + case TApplication: + length_type (name, t->subtype, variable); + fprintf (codefile, "ret += 1 + length_len (ret);\n"); + break; + default : + abort (); + } +} + +void +generate_type_length (const Symbol *s) +{ + fprintf (headerfile, + "size_t length_%s(const %s *);\n", + s->gen_name, s->gen_name); + + fprintf (codefile, + "size_t\n" + "length_%s(const %s *data)\n" + "{\n" + "size_t ret = 0;\n", + s->gen_name, s->gen_name); + + length_type ("data", s->type, "ret"); + fprintf (codefile, "return ret;\n}\n\n"); +} + |