408 lines
12 KiB
C
Executable file
408 lines
12 KiB
C
Executable file
/* $OpenBSD: asn1_par.c,v 1.28 2020/01/09 11:27:21 inoguchi Exp $ */
|
|
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
|
|
* All rights reserved.
|
|
*
|
|
* This package is an SSL implementation written
|
|
* by Eric Young (eay@cryptsoft.com).
|
|
* The implementation was written so as to conform with Netscapes SSL.
|
|
*
|
|
* This library is free for commercial and non-commercial use as long as
|
|
* the following conditions are aheared to. The following conditions
|
|
* apply to all code found in this distribution, be it the RC4, RSA,
|
|
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
|
|
* included with this distribution is covered by the same copyright terms
|
|
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
|
|
*
|
|
* Copyright remains Eric Young's, and as such any Copyright notices in
|
|
* the code are not to be removed.
|
|
* If this package is used in a product, Eric Young should be given attribution
|
|
* as the author of the parts of the library used.
|
|
* This can be in the form of a textual message at program startup or
|
|
* in documentation (online or textual) provided with the package.
|
|
*
|
|
* 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 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* "This product includes cryptographic software written by
|
|
* Eric Young (eay@cryptsoft.com)"
|
|
* The word 'cryptographic' can be left out if the rouines from the library
|
|
* being used are not cryptographic related :-).
|
|
* 4. If you include any Windows specific code (or a derivative thereof) from
|
|
* the apps directory (application code) you must include an acknowledgement:
|
|
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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.
|
|
*
|
|
* The licence and distribution terms for any publically available version or
|
|
* derivative of this code cannot be changed. i.e. this code cannot simply be
|
|
* copied and put under another distribution licence
|
|
* [including the GNU Public Licence.]
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <openssl/asn1.h>
|
|
#include <openssl/buffer.h>
|
|
#include <openssl/objects.h>
|
|
|
|
static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
|
|
int indent);
|
|
static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
|
|
int offset, int depth, int indent, int dump);
|
|
|
|
static int
|
|
asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
|
|
int indent)
|
|
{
|
|
char str[128];
|
|
const char *p;
|
|
|
|
if (constructed & V_ASN1_CONSTRUCTED)
|
|
p="cons: ";
|
|
else
|
|
p="prim: ";
|
|
if (BIO_write(bp, p, 6) < 6)
|
|
goto err;
|
|
BIO_indent(bp, indent, 128);
|
|
|
|
p = str;
|
|
if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
|
|
snprintf(str, sizeof str, "priv [ %d ] ", tag);
|
|
else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
|
|
snprintf(str, sizeof str, "cont [ %d ]", tag);
|
|
else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
|
|
snprintf(str, sizeof str, "appl [ %d ]", tag);
|
|
else if (tag > 30)
|
|
snprintf(str, sizeof str, "<ASN1 %d>", tag);
|
|
else
|
|
p = ASN1_tag2str(tag);
|
|
|
|
if (BIO_printf(bp, "%-18s", p) <= 0)
|
|
goto err;
|
|
return (1);
|
|
err:
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
|
|
{
|
|
return (asn1_parse2(bp, &pp, len, 0, 0, indent, 0));
|
|
}
|
|
|
|
int
|
|
ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump)
|
|
{
|
|
return (asn1_parse2(bp, &pp, len, 0, 0, indent, dump));
|
|
}
|
|
|
|
static int
|
|
asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset,
|
|
int depth, int indent, int dump)
|
|
{
|
|
const unsigned char *p, *ep, *tot, *op, *opp;
|
|
long len;
|
|
int tag, xclass, ret = 0;
|
|
int nl, hl, j, r;
|
|
ASN1_OBJECT *o = NULL;
|
|
ASN1_OCTET_STRING *os = NULL;
|
|
ASN1_INTEGER *ai = NULL;
|
|
ASN1_ENUMERATED *ae = NULL;
|
|
/* ASN1_BMPSTRING *bmp=NULL;*/
|
|
int dump_indent;
|
|
|
|
dump_indent = 6; /* Because we know BIO_dump_indent() */
|
|
p = *pp;
|
|
tot = p + length;
|
|
op = p - 1;
|
|
if (depth > 128) {
|
|
BIO_printf(bp, "Max depth exceeded\n");
|
|
goto end;
|
|
}
|
|
while ((p < tot) && (op < p)) {
|
|
op = p;
|
|
j = ASN1_get_object(&p, &len, &tag, &xclass, length);
|
|
|
|
if (j & 0x80) {
|
|
if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
|
|
goto end;
|
|
ret = 0;
|
|
goto end;
|
|
}
|
|
hl = (p - op);
|
|
length -= hl;
|
|
/* if j == 0x21 it is a constructed indefinite length object */
|
|
if (BIO_printf(bp, "%5ld:", (long)offset +
|
|
(long)(op - *pp)) <= 0)
|
|
goto end;
|
|
|
|
if (j != (V_ASN1_CONSTRUCTED | 1)) {
|
|
if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
|
|
depth, (long)hl, len) <= 0)
|
|
goto end;
|
|
} else {
|
|
if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ",
|
|
depth, (long)hl) <= 0)
|
|
goto end;
|
|
}
|
|
if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
|
|
goto end;
|
|
if (j & V_ASN1_CONSTRUCTED) {
|
|
ep = p + len;
|
|
if (BIO_write(bp, "\n", 1) <= 0)
|
|
goto end;
|
|
if (len > length) {
|
|
BIO_printf(bp, "length is greater than %ld\n",
|
|
length);
|
|
ret = 0;
|
|
goto end;
|
|
}
|
|
if ((j == 0x21) && (len == 0)) {
|
|
for (;;) {
|
|
r = asn1_parse2(bp, &p, (long)(tot - p),
|
|
offset + (p - *pp), depth + 1,
|
|
indent, dump);
|
|
if (r == 0) {
|
|
ret = 0;
|
|
goto end;
|
|
}
|
|
if ((r == 2) || (p >= tot)) {
|
|
len = (long)(p - ep);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
while (p < ep) {
|
|
r = asn1_parse2(bp, &p, (long)(ep - p),
|
|
offset + (p - *pp), depth + 1,
|
|
indent, dump);
|
|
if (r == 0) {
|
|
ret = 0;
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
} else if (xclass != 0) {
|
|
p += len;
|
|
if (BIO_write(bp, "\n", 1) <= 0)
|
|
goto end;
|
|
} else {
|
|
nl = 0;
|
|
if ((tag == V_ASN1_PRINTABLESTRING) ||
|
|
(tag == V_ASN1_T61STRING) ||
|
|
(tag == V_ASN1_IA5STRING) ||
|
|
(tag == V_ASN1_VISIBLESTRING) ||
|
|
(tag == V_ASN1_NUMERICSTRING) ||
|
|
(tag == V_ASN1_UTF8STRING) ||
|
|
(tag == V_ASN1_UTCTIME) ||
|
|
(tag == V_ASN1_GENERALIZEDTIME)) {
|
|
if (BIO_write(bp, ":", 1) <= 0)
|
|
goto end;
|
|
if ((len > 0) &&
|
|
BIO_write(bp, (const char *)p, (int)len) !=
|
|
(int)len)
|
|
goto end;
|
|
} else if (tag == V_ASN1_OBJECT) {
|
|
opp = op;
|
|
if (d2i_ASN1_OBJECT(&o, &opp, len + hl) !=
|
|
NULL) {
|
|
if (BIO_write(bp, ":", 1) <= 0)
|
|
goto end;
|
|
i2a_ASN1_OBJECT(bp, o);
|
|
} else {
|
|
if (BIO_write(bp, ":BAD OBJECT",
|
|
11) <= 0)
|
|
goto end;
|
|
}
|
|
} else if (tag == V_ASN1_BOOLEAN) {
|
|
int ii;
|
|
|
|
opp = op;
|
|
ii = d2i_ASN1_BOOLEAN(NULL, &opp, len + hl);
|
|
if (ii < 0) {
|
|
if (BIO_write(bp, "Bad boolean\n",
|
|
12) <= 0)
|
|
goto end;
|
|
}
|
|
BIO_printf(bp, ":%d", ii);
|
|
} else if (tag == V_ASN1_BMPSTRING) {
|
|
/* do the BMP thang */
|
|
} else if (tag == V_ASN1_OCTET_STRING) {
|
|
int i, printable = 1;
|
|
|
|
opp = op;
|
|
os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
|
|
if (os != NULL && os->length > 0) {
|
|
opp = os->data;
|
|
/* testing whether the octet string is
|
|
* printable */
|
|
for (i = 0; i < os->length; i++) {
|
|
if (((opp[i] < ' ') &&
|
|
(opp[i] != '\n') &&
|
|
(opp[i] != '\r') &&
|
|
(opp[i] != '\t')) ||
|
|
(opp[i] > '~')) {
|
|
printable = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (printable) {
|
|
/* printable string */
|
|
if (BIO_write(bp, ":", 1) <= 0)
|
|
goto end;
|
|
if (BIO_write(bp, (const char *)opp,
|
|
os->length) <= 0)
|
|
goto end;
|
|
} else if (!dump) {
|
|
/* not printable => print octet string
|
|
* as hex dump */
|
|
if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
|
|
goto end;
|
|
for (i = 0; i < os->length; i++) {
|
|
if (BIO_printf(bp,
|
|
"%02X", opp[i]) <= 0)
|
|
goto end;
|
|
}
|
|
} else {
|
|
/* print the normal dump */
|
|
if (!nl) {
|
|
if (BIO_write(bp, "\n", 1) <= 0)
|
|
goto end;
|
|
}
|
|
if (BIO_dump_indent(bp,
|
|
(const char *)opp,
|
|
((dump == -1 || dump >
|
|
os->length) ? os->length : dump),
|
|
dump_indent) <= 0)
|
|
goto end;
|
|
nl = 1;
|
|
}
|
|
}
|
|
ASN1_OCTET_STRING_free(os);
|
|
os = NULL;
|
|
} else if (tag == V_ASN1_INTEGER) {
|
|
int i;
|
|
|
|
opp = op;
|
|
ai = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
|
|
if (ai != NULL) {
|
|
if (BIO_write(bp, ":", 1) <= 0)
|
|
goto end;
|
|
if (ai->type == V_ASN1_NEG_INTEGER)
|
|
if (BIO_write(bp, "-", 1) <= 0)
|
|
goto end;
|
|
for (i = 0; i < ai->length; i++) {
|
|
if (BIO_printf(bp, "%02X",
|
|
ai->data[i]) <= 0)
|
|
goto end;
|
|
}
|
|
if (ai->length == 0) {
|
|
if (BIO_write(bp, "00", 2) <= 0)
|
|
goto end;
|
|
}
|
|
} else {
|
|
if (BIO_write(bp, "BAD INTEGER", 11) <= 0)
|
|
goto end;
|
|
}
|
|
ASN1_INTEGER_free(ai);
|
|
ai = NULL;
|
|
} else if (tag == V_ASN1_ENUMERATED) {
|
|
int i;
|
|
|
|
opp = op;
|
|
ae = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
|
|
if (ae != NULL) {
|
|
if (BIO_write(bp, ":", 1) <= 0)
|
|
goto end;
|
|
if (ae->type == V_ASN1_NEG_ENUMERATED)
|
|
if (BIO_write(bp, "-", 1) <= 0)
|
|
goto end;
|
|
for (i = 0; i < ae->length; i++) {
|
|
if (BIO_printf(bp, "%02X",
|
|
ae->data[i]) <= 0)
|
|
goto end;
|
|
}
|
|
if (ae->length == 0) {
|
|
if (BIO_write(bp, "00", 2) <= 0)
|
|
goto end;
|
|
}
|
|
} else {
|
|
if (BIO_write(bp, "BAD ENUMERATED", 14) <= 0)
|
|
goto end;
|
|
}
|
|
ASN1_ENUMERATED_free(ae);
|
|
ae = NULL;
|
|
} else if (len > 0 && dump) {
|
|
if (!nl) {
|
|
if (BIO_write(bp, "\n", 1) <= 0)
|
|
goto end;
|
|
}
|
|
if (BIO_dump_indent(bp, (const char *)p,
|
|
((dump == -1 || dump > len) ? len : dump),
|
|
dump_indent) <= 0)
|
|
goto end;
|
|
nl = 1;
|
|
}
|
|
|
|
if (!nl) {
|
|
if (BIO_write(bp, "\n", 1) <= 0)
|
|
goto end;
|
|
}
|
|
p += len;
|
|
if ((tag == V_ASN1_EOC) && (xclass == 0)) {
|
|
ret = 2; /* End of sequence */
|
|
goto end;
|
|
}
|
|
}
|
|
length -= len;
|
|
}
|
|
ret = 1;
|
|
|
|
end:
|
|
if (o != NULL)
|
|
ASN1_OBJECT_free(o);
|
|
ASN1_OCTET_STRING_free(os);
|
|
ASN1_INTEGER_free(ai);
|
|
ASN1_ENUMERATED_free(ae);
|
|
*pp = p;
|
|
return (ret);
|
|
}
|
|
|
|
const char *
|
|
ASN1_tag2str(int tag)
|
|
{
|
|
static const char * const tag2str[] = {
|
|
"EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
|
|
"NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
|
|
"ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */
|
|
"<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */
|
|
"NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */
|
|
"VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME", /* 21-24 */
|
|
"GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */
|
|
"UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */
|
|
};
|
|
|
|
if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
|
|
tag &= ~0x100;
|
|
|
|
if (tag < 0 || tag > 30)
|
|
return "(unknown)";
|
|
return tag2str[tag];
|
|
}
|