2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/buffer.h>
13 #include <openssl/objects.h>
14 #include <openssl/asn1.h>
16 #ifndef ASN1_PARSE_MAXDEPTH
17 #define ASN1_PARSE_MAXDEPTH 128
20 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
22 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
23 int offset, int depth, int indent, int dump);
24 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
27 static const char fmt[] = "%-18s";
31 if (constructed & V_ASN1_CONSTRUCTED)
35 if (BIO_write(bp, p, 6) < 6)
37 BIO_indent(bp, indent, 128);
40 if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
41 BIO_snprintf(str, sizeof(str), "priv [ %d ] ", tag);
42 else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
43 BIO_snprintf(str, sizeof(str), "cont [ %d ]", tag);
44 else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
45 BIO_snprintf(str, sizeof(str), "appl [ %d ]", tag);
47 BIO_snprintf(str, sizeof(str), "<ASN1 %d>", tag);
49 p = ASN1_tag2str(tag);
51 if (BIO_printf(bp, fmt, p) <= 0)
58 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
60 return asn1_parse2(bp, &pp, len, 0, 0, indent, 0);
63 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent,
66 return asn1_parse2(bp, &pp, len, 0, 0, indent, dump);
69 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
70 int offset, int depth, int indent, int dump)
72 const unsigned char *p, *ep, *tot, *op, *opp;
74 int tag, xclass, ret = 0;
76 ASN1_OBJECT *o = NULL;
77 ASN1_OCTET_STRING *os = NULL;
78 ASN1_INTEGER *ai = NULL;
79 ASN1_ENUMERATED *ae = NULL;
80 /* ASN1_BMPSTRING *bmp=NULL; */
81 int dump_indent, dump_cont = 0;
83 if (depth > ASN1_PARSE_MAXDEPTH) {
84 BIO_puts(bp, "BAD RECURSION DEPTH\n");
88 dump_indent = 6; /* Because we know BIO_dump_indent() */
93 j = ASN1_get_object(&p, &len, &tag, &xclass, length);
95 if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
103 * if j == 0x21 it is a constructed indefinite length object
105 if (BIO_printf(bp, "%5ld:", (long)offset + (long)(op - *pp))
109 if (j != (V_ASN1_CONSTRUCTED | 1)) {
110 if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
111 depth, (long)hl, len) <= 0)
114 if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ", depth, (long)hl) <= 0)
117 if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
119 if (j & V_ASN1_CONSTRUCTED) {
120 const unsigned char *sp = p;
123 if (BIO_write(bp, "\n", 1) <= 0)
126 BIO_printf(bp, "length is greater than %ld\n", length);
130 if ((j == 0x21) && (len == 0)) {
132 r = asn1_parse2(bp, &p, (long)(tot - p),
133 offset + (p - *pp), depth + 1,
139 if ((r == 2) || (p >= tot)) {
149 r = asn1_parse2(bp, &p, tmp,
150 offset + (p - *pp), depth + 1,
159 } else if (xclass != 0) {
161 if (BIO_write(bp, "\n", 1) <= 0)
165 if ((tag == V_ASN1_PRINTABLESTRING) ||
166 (tag == V_ASN1_T61STRING) ||
167 (tag == V_ASN1_IA5STRING) ||
168 (tag == V_ASN1_VISIBLESTRING) ||
169 (tag == V_ASN1_NUMERICSTRING) ||
170 (tag == V_ASN1_UTF8STRING) ||
171 (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) {
172 if (BIO_write(bp, ":", 1) <= 0)
174 if ((len > 0) && BIO_write(bp, (const char *)p, (int)len)
177 } else if (tag == V_ASN1_OBJECT) {
179 if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
180 if (BIO_write(bp, ":", 1) <= 0)
182 i2a_ASN1_OBJECT(bp, o);
184 if (BIO_puts(bp, ":BAD OBJECT") <= 0)
188 } else if (tag == V_ASN1_BOOLEAN) {
190 if (BIO_puts(bp, ":BAD BOOLEAN") <= 0)
195 BIO_printf(bp, ":%u", p[0]);
196 } else if (tag == V_ASN1_BMPSTRING) {
197 /* do the BMP thang */
198 } else if (tag == V_ASN1_OCTET_STRING) {
199 int i, printable = 1;
202 os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
203 if (os != NULL && os->length > 0) {
206 * testing whether the octet string is printable
208 for (i = 0; i < os->length; i++) {
209 if (((opp[i] < ' ') &&
212 (opp[i] != '\t')) || (opp[i] > '~')) {
218 /* printable string */
220 if (BIO_write(bp, ":", 1) <= 0)
222 if (BIO_write(bp, (const char *)opp, os->length) <= 0)
226 * not printable => print octet string as hex dump
229 if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
231 for (i = 0; i < os->length; i++) {
232 if (BIO_printf(bp, "%02X", opp[i]) <= 0)
236 /* print the normal dump */
239 if (BIO_write(bp, "\n", 1) <= 0)
242 if (BIO_dump_indent(bp,
244 ((dump == -1 || dump >
246 length) ? os->length : dump),
252 ASN1_OCTET_STRING_free(os);
254 } else if (tag == V_ASN1_INTEGER) {
258 ai = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
260 if (BIO_write(bp, ":", 1) <= 0)
262 if (ai->type == V_ASN1_NEG_INTEGER)
263 if (BIO_write(bp, "-", 1) <= 0)
265 for (i = 0; i < ai->length; i++) {
266 if (BIO_printf(bp, "%02X", ai->data[i]) <= 0)
269 if (ai->length == 0) {
270 if (BIO_write(bp, "00", 2) <= 0)
274 if (BIO_puts(bp, ":BAD INTEGER") <= 0)
278 ASN1_INTEGER_free(ai);
280 } else if (tag == V_ASN1_ENUMERATED) {
284 ae = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
286 if (BIO_write(bp, ":", 1) <= 0)
288 if (ae->type == V_ASN1_NEG_ENUMERATED)
289 if (BIO_write(bp, "-", 1) <= 0)
291 for (i = 0; i < ae->length; i++) {
292 if (BIO_printf(bp, "%02X", ae->data[i]) <= 0)
295 if (ae->length == 0) {
296 if (BIO_write(bp, "00", 2) <= 0)
300 if (BIO_puts(bp, ":BAD ENUMERATED") <= 0)
304 ASN1_ENUMERATED_free(ae);
306 } else if (len > 0 && dump) {
308 if (BIO_write(bp, "\n", 1) <= 0)
311 if (BIO_dump_indent(bp, (const char *)p,
312 ((dump == -1 || dump > len) ? len : dump),
319 const unsigned char *tmp = op + hl;
320 if (BIO_puts(bp, ":[") <= 0)
322 for (i = 0; i < len; i++) {
323 if (BIO_printf(bp, "%02X", tmp[i]) <= 0)
326 if (BIO_puts(bp, "]") <= 0)
331 if (BIO_write(bp, "\n", 1) <= 0)
335 if ((tag == V_ASN1_EOC) && (xclass == 0)) {
336 ret = 2; /* End of sequence */
345 ASN1_OCTET_STRING_free(os);
346 ASN1_INTEGER_free(ai);
347 ASN1_ENUMERATED_free(ae);
352 const char *ASN1_tag2str(int tag)
354 static const char *const tag2str[] = {
356 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
358 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
360 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
362 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
364 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
366 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
368 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
370 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
373 if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
376 if (tag < 0 || tag > 30)