You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
424 lines
15 KiB
424 lines
15 KiB
/* crypto/asn1/asn1_par.c */ |
|
/* 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 "cryptlib.h" |
|
#include <openssl/buffer.h> |
|
#include <openssl/objects.h> |
|
#include <openssl/asn1.h> |
|
|
|
#ifndef ASN1_PARSE_MAXDEPTH |
|
#define ASN1_PARSE_MAXDEPTH 128 |
|
#endif |
|
|
|
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) |
|
{ |
|
static const char fmt[] = "%-18s"; |
|
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) |
|
BIO_snprintf(str, sizeof str, "priv [ %d ] ", tag); |
|
else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) |
|
BIO_snprintf(str, sizeof str, "cont [ %d ]", tag); |
|
else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) |
|
BIO_snprintf(str, sizeof str, "appl [ %d ]", tag); |
|
else if (tag > 30) |
|
BIO_snprintf(str, sizeof str, "<ASN1 %d>", tag); |
|
else |
|
p = ASN1_tag2str(tag); |
|
|
|
if (BIO_printf(bp, fmt, 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_BMPSTRING *bmp=NULL; */ |
|
int dump_indent; |
|
|
|
#if 0 |
|
dump_indent = indent; |
|
#else |
|
dump_indent = 6; /* Because we know BIO_dump_indent() */ |
|
#endif |
|
|
|
if (depth > ASN1_PARSE_MAXDEPTH) { |
|
BIO_puts(bp, "BAD RECURSION DEPTH\n"); |
|
return 0; |
|
} |
|
|
|
p = *pp; |
|
tot = p + length; |
|
op = p - 1; |
|
while ((p < tot) && (op < p)) { |
|
op = p; |
|
j = ASN1_get_object(&p, &len, &tag, &xclass, length); |
|
#ifdef LINT |
|
j = j; |
|
#endif |
|
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) { |
|
const unsigned char *sp; |
|
|
|
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)) { |
|
sp = p; |
|
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 = p - sp; |
|
break; |
|
} |
|
} |
|
} else { |
|
long tmp = len; |
|
|
|
while (p < ep) { |
|
sp = p; |
|
r = asn1_parse2(bp, &p, tmp, offset + (p - *pp), depth + 1, |
|
indent, dump); |
|
if (r == 0) { |
|
ret = 0; |
|
goto end; |
|
} |
|
tmp -= p - sp; |
|
} |
|
} |
|
} 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; |
|
} |
|
} |
|
if (os != NULL) { |
|
M_ASN1_OCTET_STRING_free(os); |
|
os = NULL; |
|
} |
|
} else if (tag == V_ASN1_INTEGER) { |
|
ASN1_INTEGER *bs; |
|
int i; |
|
|
|
opp = op; |
|
bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl); |
|
if (bs != NULL) { |
|
if (BIO_write(bp, ":", 1) <= 0) |
|
goto end; |
|
if (bs->type == V_ASN1_NEG_INTEGER) |
|
if (BIO_write(bp, "-", 1) <= 0) |
|
goto end; |
|
for (i = 0; i < bs->length; i++) { |
|
if (BIO_printf(bp, "%02X", bs->data[i]) <= 0) |
|
goto end; |
|
} |
|
if (bs->length == 0) { |
|
if (BIO_write(bp, "00", 2) <= 0) |
|
goto end; |
|
} |
|
} else { |
|
if (BIO_write(bp, "BAD INTEGER", 11) <= 0) |
|
goto end; |
|
} |
|
M_ASN1_INTEGER_free(bs); |
|
} else if (tag == V_ASN1_ENUMERATED) { |
|
ASN1_ENUMERATED *bs; |
|
int i; |
|
|
|
opp = op; |
|
bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl); |
|
if (bs != NULL) { |
|
if (BIO_write(bp, ":", 1) <= 0) |
|
goto end; |
|
if (bs->type == V_ASN1_NEG_ENUMERATED) |
|
if (BIO_write(bp, "-", 1) <= 0) |
|
goto end; |
|
for (i = 0; i < bs->length; i++) { |
|
if (BIO_printf(bp, "%02X", bs->data[i]) <= 0) |
|
goto end; |
|
} |
|
if (bs->length == 0) { |
|
if (BIO_write(bp, "00", 2) <= 0) |
|
goto end; |
|
} |
|
} else { |
|
if (BIO_write(bp, "BAD ENUMERATED", 14) <= 0) |
|
goto end; |
|
} |
|
M_ASN1_ENUMERATED_free(bs); |
|
} 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); |
|
if (os != NULL) |
|
M_ASN1_OCTET_STRING_free(os); |
|
*pp = p; |
|
return (ret); |
|
} |
|
|
|
const char *ASN1_tag2str(int tag) |
|
{ |
|
static const char *const tag2str[] = { |
|
/* 0-4 */ |
|
"EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", |
|
/* 5-9 */ |
|
"NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", |
|
/* 10-13 */ |
|
"ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", |
|
/* 15-17 */ |
|
"<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", |
|
/* 18-20 */ |
|
"NUMERICSTRING", "PRINTABLESTRING", "T61STRING", |
|
/* 21-24 */ |
|
"VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME", |
|
/* 25-27 */ |
|
"GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", |
|
/* 28-30 */ |
|
"UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" |
|
}; |
|
|
|
if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) |
|
tag &= ~0x100; |
|
|
|
if (tag < 0 || tag > 30) |
|
return "(unknown)"; |
|
return tag2str[tag]; |
|
}
|
|
|