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/* $OpenBSD: asn1_par.c,v 1.25 2015/09/30 19:01:14 jsing Exp $ */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include <stdio.h> |
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#include <openssl/asn1.h> |
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#include <openssl/buffer.h> |
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#include <openssl/objects.h> |
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static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed, |
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int indent); |
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static int asn1_parse2(BIO *bp, const unsigned char **pp, long length, |
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int offset, int depth, int indent, int dump); |
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static int |
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asn1_print_info(BIO *bp, int tag, int xclass, int constructed, |
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int indent) |
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{ |
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char str[128]; |
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const char *p; |
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|
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if (constructed & V_ASN1_CONSTRUCTED) |
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p="cons: "; |
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else |
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p="prim: "; |
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if (BIO_write(bp, p, 6) < 6) |
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goto err; |
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BIO_indent(bp, indent, 128); |
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p = str; |
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if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE) |
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snprintf(str, sizeof str, "priv [ %d ] ", tag); |
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else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC) |
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snprintf(str, sizeof str, "cont [ %d ]", tag); |
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else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION) |
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snprintf(str, sizeof str, "appl [ %d ]", tag); |
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else if (tag > 30) |
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snprintf(str, sizeof str, "<ASN1 %d>", tag); |
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else |
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p = ASN1_tag2str(tag); |
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|
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if (BIO_printf(bp, "%-18s", p) <= 0) |
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goto err; |
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return (1); |
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err: |
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return (0); |
102 |
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} |
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int |
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ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent) |
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{ |
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return (asn1_parse2(bp, &pp, len, 0, 0, indent, 0)); |
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} |
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int |
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ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent, int dump) |
112 |
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{ |
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return (asn1_parse2(bp, &pp, len, 0, 0, indent, dump)); |
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} |
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static int |
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asn1_parse2(BIO *bp, const unsigned char **pp, long length, int offset, |
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int depth, int indent, int dump) |
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{ |
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const unsigned char *p, *ep, *tot, *op, *opp; |
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long len; |
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int tag, xclass, ret = 0; |
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int nl, hl, j, r; |
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ASN1_OBJECT *o = NULL; |
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ASN1_OCTET_STRING *os = NULL; |
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/* ASN1_BMPSTRING *bmp=NULL;*/ |
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int dump_indent; |
128 |
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129 |
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dump_indent = 6; /* Because we know BIO_dump_indent() */ |
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p = *pp; |
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tot = p + length; |
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op = p - 1; |
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while ((p < tot) && (op < p)) { |
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op = p; |
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j = ASN1_get_object(&p, &len, &tag, &xclass, length); |
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137 |
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if (j & 0x80) { |
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if (BIO_write(bp, "Error in encoding\n", 18) <= 0) |
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goto end; |
140 |
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ret = 0; |
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goto end; |
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} |
143 |
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hl = (p - op); |
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length -= hl; |
145 |
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/* if j == 0x21 it is a constructed indefinite length object */ |
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if (BIO_printf(bp, "%5ld:", (long)offset + |
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(long)(op - *pp)) <= 0) |
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goto end; |
149 |
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150 |
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if (j != (V_ASN1_CONSTRUCTED | 1)) { |
151 |
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if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ", |
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depth, (long)hl, len) <= 0) |
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goto end; |
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} else { |
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if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ", |
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depth, (long)hl) <= 0) |
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goto end; |
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} |
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if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0)) |
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goto end; |
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if (j & V_ASN1_CONSTRUCTED) { |
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ep = p + len; |
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if (BIO_write(bp, "\n", 1) <= 0) |
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goto end; |
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if (len > length) { |
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BIO_printf(bp, "length is greater than %ld\n", |
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length); |
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ret = 0; |
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goto end; |
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} |
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if ((j == 0x21) && (len == 0)) { |
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for (;;) { |
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r = asn1_parse2(bp, &p, (long)(tot - p), |
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offset + (p - *pp), depth + 1, |
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indent, dump); |
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if (r == 0) { |
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ret = 0; |
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goto end; |
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} |
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if ((r == 2) || (p >= tot)) |
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break; |
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} |
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} else |
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while (p < ep) { |
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r = asn1_parse2(bp, &p, (long)len, |
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offset + (p - *pp), depth + 1, |
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indent, dump); |
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if (r == 0) { |
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ret = 0; |
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goto end; |
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} |
192 |
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} |
193 |
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} else if (xclass != 0) { |
194 |
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p += len; |
195 |
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if (BIO_write(bp, "\n", 1) <= 0) |
196 |
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goto end; |
197 |
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} else { |
198 |
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nl = 0; |
199 |
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if ((tag == V_ASN1_PRINTABLESTRING) || |
200 |
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(tag == V_ASN1_T61STRING) || |
201 |
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(tag == V_ASN1_IA5STRING) || |
202 |
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(tag == V_ASN1_VISIBLESTRING) || |
203 |
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(tag == V_ASN1_NUMERICSTRING) || |
204 |
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(tag == V_ASN1_UTF8STRING) || |
205 |
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(tag == V_ASN1_UTCTIME) || |
206 |
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(tag == V_ASN1_GENERALIZEDTIME)) { |
207 |
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if (BIO_write(bp, ":", 1) <= 0) |
208 |
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goto end; |
209 |
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if ((len > 0) && |
210 |
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BIO_write(bp, (const char *)p, (int)len) != |
211 |
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(int)len) |
212 |
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goto end; |
213 |
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} else if (tag == V_ASN1_OBJECT) { |
214 |
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opp = op; |
215 |
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if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != |
216 |
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NULL) { |
217 |
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if (BIO_write(bp, ":", 1) <= 0) |
218 |
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goto end; |
219 |
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i2a_ASN1_OBJECT(bp, o); |
220 |
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} else { |
221 |
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if (BIO_write(bp, ":BAD OBJECT", |
222 |
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11) <= 0) |
223 |
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goto end; |
224 |
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} |
225 |
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} else if (tag == V_ASN1_BOOLEAN) { |
226 |
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int ii; |
227 |
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228 |
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opp = op; |
229 |
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ii = d2i_ASN1_BOOLEAN(NULL, &opp, len + hl); |
230 |
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if (ii < 0) { |
231 |
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if (BIO_write(bp, "Bad boolean\n", |
232 |
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12) <= 0) |
233 |
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goto end; |
234 |
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} |
235 |
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BIO_printf(bp, ":%d", ii); |
236 |
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} else if (tag == V_ASN1_BMPSTRING) { |
237 |
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/* do the BMP thang */ |
238 |
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} else if (tag == V_ASN1_OCTET_STRING) { |
239 |
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int i, printable = 1; |
240 |
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|
241 |
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opp = op; |
242 |
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os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl); |
243 |
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if (os != NULL && os->length > 0) { |
244 |
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opp = os->data; |
245 |
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/* testing whether the octet string is |
246 |
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* printable */ |
247 |
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for (i = 0; i < os->length; i++) { |
248 |
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if (((opp[i] < ' ') && |
249 |
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(opp[i] != '\n') && |
250 |
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(opp[i] != '\r') && |
251 |
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(opp[i] != '\t')) || |
252 |
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(opp[i] > '~')) { |
253 |
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printable = 0; |
254 |
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break; |
255 |
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} |
256 |
|
|
} |
257 |
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if (printable) { |
258 |
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/* printable string */ |
259 |
|
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if (BIO_write(bp, ":", 1) <= 0) |
260 |
|
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goto end; |
261 |
|
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if (BIO_write(bp, (const char *)opp, |
262 |
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os->length) <= 0) |
263 |
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goto end; |
264 |
|
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} else if (!dump) { |
265 |
|
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/* not printable => print octet string |
266 |
|
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* as hex dump */ |
267 |
|
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if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0) |
268 |
|
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goto end; |
269 |
|
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for (i = 0; i < os->length; i++) { |
270 |
|
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if (BIO_printf(bp, |
271 |
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"%02X", opp[i]) <= 0) |
272 |
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goto end; |
273 |
|
|
} |
274 |
|
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} else { |
275 |
|
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/* print the normal dump */ |
276 |
|
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if (!nl) { |
277 |
|
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if (BIO_write(bp, "\n", 1) <= 0) |
278 |
|
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goto end; |
279 |
|
|
} |
280 |
|
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if (BIO_dump_indent(bp, |
281 |
|
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(const char *)opp, |
282 |
|
|
((dump == -1 || dump > |
283 |
|
|
os->length) ? os->length : dump), |
284 |
|
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dump_indent) <= 0) |
285 |
|
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goto end; |
286 |
|
|
nl = 1; |
287 |
|
|
} |
288 |
|
|
} |
289 |
|
|
ASN1_OCTET_STRING_free(os); |
290 |
|
|
os = NULL; |
291 |
|
|
} else if (tag == V_ASN1_INTEGER) { |
292 |
|
|
ASN1_INTEGER *bs; |
293 |
|
|
int i; |
294 |
|
|
|
295 |
|
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opp = op; |
296 |
|
|
bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl); |
297 |
|
|
if (bs != NULL) { |
298 |
|
|
if (BIO_write(bp, ":", 1) <= 0) |
299 |
|
|
goto end; |
300 |
|
|
if (bs->type == V_ASN1_NEG_INTEGER) |
301 |
|
|
if (BIO_write(bp, "-", 1) <= 0) |
302 |
|
|
goto end; |
303 |
|
|
for (i = 0; i < bs->length; i++) { |
304 |
|
|
if (BIO_printf(bp, "%02X", |
305 |
|
|
bs->data[i]) <= 0) |
306 |
|
|
goto end; |
307 |
|
|
} |
308 |
|
|
if (bs->length == 0) { |
309 |
|
|
if (BIO_write(bp, "00", 2) <= 0) |
310 |
|
|
goto end; |
311 |
|
|
} |
312 |
|
|
} else { |
313 |
|
|
if (BIO_write(bp, "BAD INTEGER", 11) <= 0) |
314 |
|
|
goto end; |
315 |
|
|
} |
316 |
|
|
ASN1_INTEGER_free(bs); |
317 |
|
|
} else if (tag == V_ASN1_ENUMERATED) { |
318 |
|
|
ASN1_ENUMERATED *bs; |
319 |
|
|
int i; |
320 |
|
|
|
321 |
|
|
opp = op; |
322 |
|
|
bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl); |
323 |
|
|
if (bs != NULL) { |
324 |
|
|
if (BIO_write(bp, ":", 1) <= 0) |
325 |
|
|
goto end; |
326 |
|
|
if (bs->type == V_ASN1_NEG_ENUMERATED) |
327 |
|
|
if (BIO_write(bp, "-", 1) <= 0) |
328 |
|
|
goto end; |
329 |
|
|
for (i = 0; i < bs->length; i++) { |
330 |
|
|
if (BIO_printf(bp, "%02X", |
331 |
|
|
bs->data[i]) <= 0) |
332 |
|
|
goto end; |
333 |
|
|
} |
334 |
|
|
if (bs->length == 0) { |
335 |
|
|
if (BIO_write(bp, "00", 2) <= 0) |
336 |
|
|
goto end; |
337 |
|
|
} |
338 |
|
|
} else { |
339 |
|
|
if (BIO_write(bp, "BAD ENUMERATED", 14) <= 0) |
340 |
|
|
goto end; |
341 |
|
|
} |
342 |
|
|
ASN1_ENUMERATED_free(bs); |
343 |
|
|
} else if (len > 0 && dump) { |
344 |
|
|
if (!nl) { |
345 |
|
|
if (BIO_write(bp, "\n", 1) <= 0) |
346 |
|
|
goto end; |
347 |
|
|
} |
348 |
|
|
if (BIO_dump_indent(bp, (const char *)p, |
349 |
|
|
((dump == -1 || dump > len) ? len : dump), |
350 |
|
|
dump_indent) <= 0) |
351 |
|
|
goto end; |
352 |
|
|
nl = 1; |
353 |
|
|
} |
354 |
|
|
|
355 |
|
|
if (!nl) { |
356 |
|
|
if (BIO_write(bp, "\n", 1) <= 0) |
357 |
|
|
goto end; |
358 |
|
|
} |
359 |
|
|
p += len; |
360 |
|
|
if ((tag == V_ASN1_EOC) && (xclass == 0)) { |
361 |
|
|
ret = 2; /* End of sequence */ |
362 |
|
|
goto end; |
363 |
|
|
} |
364 |
|
|
} |
365 |
|
|
length -= len; |
366 |
|
|
} |
367 |
|
|
ret = 1; |
368 |
|
|
|
369 |
|
|
end: |
370 |
|
|
if (o != NULL) |
371 |
|
|
ASN1_OBJECT_free(o); |
372 |
|
|
ASN1_OCTET_STRING_free(os); |
373 |
|
|
*pp = p; |
374 |
|
|
return (ret); |
375 |
|
|
} |
376 |
|
|
|
377 |
|
|
const char * |
378 |
|
|
ASN1_tag2str(int tag) |
379 |
|
|
{ |
380 |
|
|
static const char * const tag2str[] = { |
381 |
|
|
"EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */ |
382 |
|
|
"NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */ |
383 |
|
|
"ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", /* 10-13 */ |
384 |
|
|
"<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", /* 15-17 */ |
385 |
|
|
"NUMERICSTRING", "PRINTABLESTRING", "T61STRING", /* 18-20 */ |
386 |
|
|
"VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME", /* 21-24 */ |
387 |
|
|
"GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING", /* 25-27 */ |
388 |
|
|
"UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING" /* 28-30 */ |
389 |
|
|
}; |
390 |
|
|
|
391 |
|
|
if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED)) |
392 |
|
|
tag &= ~0x100; |
393 |
|
|
|
394 |
|
|
if (tag < 0 || tag > 30) |
395 |
|
|
return "(unknown)"; |
396 |
|
|
return tag2str[tag]; |
397 |
|
|
} |