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/*
* Testing tool for ASN.1/X.509v3 routines
* Copyright (c) 2006, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "asn1.h"
#include "x509v3.h"
extern int wpa_debug_level;
static const char * asn1_class_str(int class)
{
switch (class) {
case ASN1_CLASS_UNIVERSAL:
return "Universal";
case ASN1_CLASS_APPLICATION:
return "Application";
case ASN1_CLASS_CONTEXT_SPECIFIC:
return "Context-specific";
case ASN1_CLASS_PRIVATE:
return "Private";
default:
return "?";
}
}
int asn1_parse(const u8 *buf, size_t len, int level)
{
const u8 *pos, *prev, *end;
char prefix[10], str[100];
int _level;
struct asn1_hdr hdr;
struct asn1_oid oid;
u8 tmp;
_level = level;
if ((size_t) _level > sizeof(prefix) - 1)
_level = sizeof(prefix) - 1;
memset(prefix, ' ', _level);
prefix[_level] = '\0';
pos = buf;
end = buf + len;
while (pos < end) {
if (asn1_get_next(pos, end - pos, &hdr) < 0)
return -1;
prev = pos;
pos = hdr.payload;
wpa_printf(MSG_MSGDUMP, "ASN.1:%s Class %d(%s) P/C %d(%s) "
"Tag %u Length %u",
prefix, hdr.class, asn1_class_str(hdr.class),
hdr.constructed,
hdr.constructed ? "Constructed" : "Primitive",
hdr.tag, hdr.length);
if (hdr.class == ASN1_CLASS_CONTEXT_SPECIFIC &&
hdr.constructed) {
if (asn1_parse(pos, hdr.length, level + 1) < 0)
return -1;
pos += hdr.length;
}
if (hdr.class != ASN1_CLASS_UNIVERSAL)
continue;
switch (hdr.tag) {
case ASN1_TAG_EOC:
if (hdr.length) {
wpa_printf(MSG_DEBUG, "ASN.1: Non-zero "
"end-of-contents length (%u)",
hdr.length);
return -1;
}
wpa_printf(MSG_MSGDUMP, "ASN.1:%s EOC", prefix);
break;
case ASN1_TAG_BOOLEAN:
if (hdr.length != 1) {
wpa_printf(MSG_DEBUG, "ASN.1: Unexpected "
"Boolean length (%u)", hdr.length);
return -1;
}
tmp = *pos++;
wpa_printf(MSG_MSGDUMP, "ASN.1:%s Boolean %s",
prefix, tmp ? "TRUE" : "FALSE");
break;
case ASN1_TAG_INTEGER:
wpa_hexdump(MSG_MSGDUMP, "ASN.1: INTEGER",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_BITSTRING:
wpa_hexdump(MSG_MSGDUMP, "ASN.1: BitString",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_OCTETSTRING:
wpa_hexdump(MSG_MSGDUMP, "ASN.1: OctetString",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_NULL:
if (hdr.length) {
wpa_printf(MSG_DEBUG, "ASN.1: Non-zero Null "
"length (%u)", hdr.length);
return -1;
}
wpa_printf(MSG_MSGDUMP, "ASN.1:%s Null", prefix);
break;
case ASN1_TAG_OID:
if (asn1_get_oid(prev, end - prev, &oid, &prev) < 0) {
wpa_printf(MSG_DEBUG, "ASN.1: Invalid OID");
return -1;
}
asn1_oid_to_str(&oid, str, sizeof(str));
wpa_printf(MSG_DEBUG, "ASN.1:%s OID %s", prefix, str);
pos += hdr.length;
break;
case ANS1_TAG_RELATIVE_OID:
wpa_hexdump(MSG_MSGDUMP, "ASN.1: Relative OID",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_SEQUENCE:
wpa_printf(MSG_MSGDUMP, "ASN.1:%s SEQUENCE", prefix);
if (asn1_parse(pos, hdr.length, level + 1) < 0)
return -1;
pos += hdr.length;
break;
case ASN1_TAG_SET:
wpa_printf(MSG_MSGDUMP, "ASN.1:%s SET", prefix);
if (asn1_parse(pos, hdr.length, level + 1) < 0)
return -1;
pos += hdr.length;
break;
case ASN1_TAG_PRINTABLESTRING:
wpa_hexdump_ascii(MSG_MSGDUMP,
"ASN.1: PrintableString",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_IA5STRING:
wpa_hexdump_ascii(MSG_MSGDUMP, "ASN.1: IA5String",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_UTCTIME:
wpa_hexdump_ascii(MSG_MSGDUMP, "ASN.1: UTCTIME",
pos, hdr.length);
pos += hdr.length;
break;
case ASN1_TAG_VISIBLESTRING:
wpa_hexdump_ascii(MSG_MSGDUMP, "ASN.1: VisibleString",
pos, hdr.length);
pos += hdr.length;
break;
default:
wpa_printf(MSG_DEBUG, "ASN.1: Unknown tag %d",
hdr.tag);
return -1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
FILE *f;
u8 buf[3000];
size_t len;
struct x509_certificate *cert;
wpa_debug_level = 0;
f = fopen(argv[1], "rb");
if (f == NULL)
return -1;
len = fread(buf, 1, sizeof(buf), f);
fclose(f);
if (asn1_parse(buf, len, 0) < 0)
printf("Failed to parse DER ASN.1\n");
printf("\n\n");
cert = x509_certificate_parse(buf, len);
if (cert == NULL)
printf("Failed to parse X.509 certificate\n");
x509_certificate_free(cert);
return 0;
}
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