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yuzu/externals/libressl/crypto/asn1/asn1_par.c

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/* $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];
}
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