2 * Copyright 1995-2016 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_BMPSTRING *bmp=NULL; */
79 int dump_indent, dump_cont = 0;
81 if (depth > ASN1_PARSE_MAXDEPTH) {
82 BIO_puts(bp, "BAD RECURSION DEPTH\n");
86 dump_indent = 6; /* Because we know BIO_dump_indent() */
90 while ((p < tot) && (op < p)) {
92 j = ASN1_get_object(&p, &len, &tag, &xclass, length);
94 if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
102 * if j == 0x21 it is a constructed indefinite length object
104 if (BIO_printf(bp, "%5ld:", (long)offset + (long)(op - *pp))
108 if (j != (V_ASN1_CONSTRUCTED | 1)) {
109 if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
110 depth, (long)hl, len) <= 0)
113 if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ", depth, (long)hl) <= 0)
116 if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
118 if (j & V_ASN1_CONSTRUCTED) {
119 const unsigned char *sp = p;
122 if (BIO_write(bp, "\n", 1) <= 0)
125 BIO_printf(bp, "length is greater than %ld\n", length);
129 if ((j == 0x21) && (len == 0)) {
131 r = asn1_parse2(bp, &p, (long)(tot - p),
132 offset + (p - *pp), depth + 1,
138 if ((r == 2) || (p >= tot)) {
148 r = asn1_parse2(bp, &p, tmp,
149 offset + (p - *pp), depth + 1,
158 } else if (xclass != 0) {
160 if (BIO_write(bp, "\n", 1) <= 0)
164 if ((tag == V_ASN1_PRINTABLESTRING) ||
165 (tag == V_ASN1_T61STRING) ||
166 (tag == V_ASN1_IA5STRING) ||
167 (tag == V_ASN1_VISIBLESTRING) ||
168 (tag == V_ASN1_NUMERICSTRING) ||
169 (tag == V_ASN1_UTF8STRING) ||
170 (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) {
171 if (BIO_write(bp, ":", 1) <= 0)
173 if ((len > 0) && BIO_write(bp, (const char *)p, (int)len)
176 } else if (tag == V_ASN1_OBJECT) {
178 if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
179 if (BIO_write(bp, ":", 1) <= 0)
181 i2a_ASN1_OBJECT(bp, o);
183 if (BIO_puts(bp, ":BAD OBJECT") <= 0)
187 } else if (tag == V_ASN1_BOOLEAN) {
189 if (BIO_puts(bp, ":BAD BOOLEAN") <= 0)
194 BIO_printf(bp, ":%u", p[0]);
195 } else if (tag == V_ASN1_BMPSTRING) {
196 /* do the BMP thang */
197 } else if (tag == V_ASN1_OCTET_STRING) {
198 int i, printable = 1;
201 os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
202 if (os != NULL && os->length > 0) {
205 * testing whether the octet string is printable
207 for (i = 0; i < os->length; i++) {
208 if (((opp[i] < ' ') &&
211 (opp[i] != '\t')) || (opp[i] > '~')) {
217 /* printable string */
219 if (BIO_write(bp, ":", 1) <= 0)
221 if (BIO_write(bp, (const char *)opp, os->length) <= 0)
225 * not printable => print octet string as hex dump
228 if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
230 for (i = 0; i < os->length; i++) {
231 if (BIO_printf(bp, "%02X", opp[i]) <= 0)
235 /* print the normal dump */
238 if (BIO_write(bp, "\n", 1) <= 0)
241 if (BIO_dump_indent(bp,
243 ((dump == -1 || dump >
245 length) ? os->length : dump),
251 ASN1_OCTET_STRING_free(os);
253 } else if (tag == V_ASN1_INTEGER) {
258 bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
260 if (BIO_write(bp, ":", 1) <= 0)
262 if (bs->type == V_ASN1_NEG_INTEGER)
263 if (BIO_write(bp, "-", 1) <= 0)
265 for (i = 0; i < bs->length; i++) {
266 if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
269 if (bs->length == 0) {
270 if (BIO_write(bp, "00", 2) <= 0)
274 if (BIO_puts(bp, ":BAD INTEGER") <= 0)
278 ASN1_INTEGER_free(bs);
279 } else if (tag == V_ASN1_ENUMERATED) {
284 bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
286 if (BIO_write(bp, ":", 1) <= 0)
288 if (bs->type == V_ASN1_NEG_ENUMERATED)
289 if (BIO_write(bp, "-", 1) <= 0)
291 for (i = 0; i < bs->length; i++) {
292 if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
295 if (bs->length == 0) {
296 if (BIO_write(bp, "00", 2) <= 0)
300 if (BIO_puts(bp, ":BAD ENUMERATED") <= 0)
304 ASN1_ENUMERATED_free(bs);
305 } else if (len > 0 && dump) {
307 if (BIO_write(bp, "\n", 1) <= 0)
310 if (BIO_dump_indent(bp, (const char *)p,
311 ((dump == -1 || dump > len) ? len : dump),
318 const unsigned char *tmp = op + hl;
319 if (BIO_puts(bp, ":[") <= 0)
321 for (i = 0; i < len; i++) {
322 if (BIO_printf(bp, "%02X", tmp[i]) <= 0)
325 if (BIO_puts(bp, "]") <= 0)
330 if (BIO_write(bp, "\n", 1) <= 0)
334 if ((tag == V_ASN1_EOC) && (xclass == 0)) {
335 ret = 2; /* End of sequence */
344 ASN1_OCTET_STRING_free(os);
349 const char *ASN1_tag2str(int tag)
351 static const char *const tag2str[] = {
353 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
355 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
357 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
359 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
361 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
363 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
365 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
367 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
370 if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
373 if (tag < 0 || tag > 30)