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() */
91 j = ASN1_get_object(&p, &len, &tag, &xclass, length);
93 if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
101 * if j == 0x21 it is a constructed indefinite length object
103 if (BIO_printf(bp, "%5ld:", (long)offset + (long)(op - *pp))
107 if (j != (V_ASN1_CONSTRUCTED | 1)) {
108 if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
109 depth, (long)hl, len) <= 0)
112 if (BIO_printf(bp, "d=%-2d hl=%ld l=inf ", depth, (long)hl) <= 0)
115 if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
117 if (j & V_ASN1_CONSTRUCTED) {
118 const unsigned char *sp = p;
121 if (BIO_write(bp, "\n", 1) <= 0)
124 BIO_printf(bp, "length is greater than %ld\n", length);
128 if ((j == 0x21) && (len == 0)) {
130 r = asn1_parse2(bp, &p, (long)(tot - p),
131 offset + (p - *pp), depth + 1,
137 if ((r == 2) || (p >= tot)) {
147 r = asn1_parse2(bp, &p, tmp,
148 offset + (p - *pp), depth + 1,
157 } else if (xclass != 0) {
159 if (BIO_write(bp, "\n", 1) <= 0)
163 if ((tag == V_ASN1_PRINTABLESTRING) ||
164 (tag == V_ASN1_T61STRING) ||
165 (tag == V_ASN1_IA5STRING) ||
166 (tag == V_ASN1_VISIBLESTRING) ||
167 (tag == V_ASN1_NUMERICSTRING) ||
168 (tag == V_ASN1_UTF8STRING) ||
169 (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) {
170 if (BIO_write(bp, ":", 1) <= 0)
172 if ((len > 0) && BIO_write(bp, (const char *)p, (int)len)
175 } else if (tag == V_ASN1_OBJECT) {
177 if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
178 if (BIO_write(bp, ":", 1) <= 0)
180 i2a_ASN1_OBJECT(bp, o);
182 if (BIO_puts(bp, ":BAD OBJECT") <= 0)
186 } else if (tag == V_ASN1_BOOLEAN) {
188 if (BIO_puts(bp, ":BAD BOOLEAN") <= 0)
193 BIO_printf(bp, ":%u", p[0]);
194 } else if (tag == V_ASN1_BMPSTRING) {
195 /* do the BMP thang */
196 } else if (tag == V_ASN1_OCTET_STRING) {
197 int i, printable = 1;
200 os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
201 if (os != NULL && os->length > 0) {
204 * testing whether the octet string is printable
206 for (i = 0; i < os->length; i++) {
207 if (((opp[i] < ' ') &&
210 (opp[i] != '\t')) || (opp[i] > '~')) {
216 /* printable string */
218 if (BIO_write(bp, ":", 1) <= 0)
220 if (BIO_write(bp, (const char *)opp, os->length) <= 0)
224 * not printable => print octet string as hex dump
227 if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
229 for (i = 0; i < os->length; i++) {
230 if (BIO_printf(bp, "%02X", opp[i]) <= 0)
234 /* print the normal dump */
237 if (BIO_write(bp, "\n", 1) <= 0)
240 if (BIO_dump_indent(bp,
242 ((dump == -1 || dump >
244 length) ? os->length : dump),
250 ASN1_OCTET_STRING_free(os);
252 } else if (tag == V_ASN1_INTEGER) {
257 bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
259 if (BIO_write(bp, ":", 1) <= 0)
261 if (bs->type == V_ASN1_NEG_INTEGER)
262 if (BIO_write(bp, "-", 1) <= 0)
264 for (i = 0; i < bs->length; i++) {
265 if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
268 if (bs->length == 0) {
269 if (BIO_write(bp, "00", 2) <= 0)
273 if (BIO_puts(bp, ":BAD INTEGER") <= 0)
277 ASN1_INTEGER_free(bs);
278 } else if (tag == V_ASN1_ENUMERATED) {
283 bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
285 if (BIO_write(bp, ":", 1) <= 0)
287 if (bs->type == V_ASN1_NEG_ENUMERATED)
288 if (BIO_write(bp, "-", 1) <= 0)
290 for (i = 0; i < bs->length; i++) {
291 if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
294 if (bs->length == 0) {
295 if (BIO_write(bp, "00", 2) <= 0)
299 if (BIO_puts(bp, ":BAD ENUMERATED") <= 0)
303 ASN1_ENUMERATED_free(bs);
304 } else if (len > 0 && dump) {
306 if (BIO_write(bp, "\n", 1) <= 0)
309 if (BIO_dump_indent(bp, (const char *)p,
310 ((dump == -1 || dump > len) ? len : dump),
317 const unsigned char *tmp = op + hl;
318 if (BIO_puts(bp, ":[") <= 0)
320 for (i = 0; i < len; i++) {
321 if (BIO_printf(bp, "%02X", tmp[i]) <= 0)
324 if (BIO_puts(bp, "]") <= 0)
329 if (BIO_write(bp, "\n", 1) <= 0)
333 if ((tag == V_ASN1_EOC) && (xclass == 0)) {
334 ret = 2; /* End of sequence */
343 ASN1_OCTET_STRING_free(os);
348 const char *ASN1_tag2str(int tag)
350 static const char *const tag2str[] = {
352 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
354 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
356 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
358 "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
360 "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
362 "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
364 "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
366 "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
369 if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
372 if (tag < 0 || tag > 30)