1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
57 #include <openssl/asn1.h>
62 #include <openssl/asn1_mac.h>
63 #include <openssl/err.h>
64 #include <openssl/mem.h>
66 #include "../internal.h"
69 /* Cross-module errors from crypto/x509/i2d_pr.c. */
70 OPENSSL_DECLARE_ERROR_REASON(ASN1, UNSUPPORTED_PUBLIC_KEY_TYPE)
72 /* Cross-module errors from crypto/x509/algorithm.c. */
73 OPENSSL_DECLARE_ERROR_REASON(ASN1, CONTEXT_NOT_INITIALISED)
74 OPENSSL_DECLARE_ERROR_REASON(ASN1, DIGEST_AND_KEY_TYPE_NOT_SUPPORTED)
75 OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_MESSAGE_DIGEST_ALGORITHM)
76 OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_SIGNATURE_ALGORITHM)
77 OPENSSL_DECLARE_ERROR_REASON(ASN1, WRONG_PUBLIC_KEY_TYPE)
79 * Cross-module errors from crypto/x509/asn1_gen.c. TODO(davidben): Remove
80 * these once asn1_gen.c is gone.
82 OPENSSL_DECLARE_ERROR_REASON(ASN1, DEPTH_EXCEEDED)
83 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_BITSTRING_FORMAT)
84 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_BOOLEAN)
85 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_FORMAT)
86 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_HEX)
87 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_IMPLICIT_TAG)
88 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_INTEGER)
89 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_NESTED_TAGGING)
90 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_NULL_VALUE)
91 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_OBJECT)
92 OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_TIME_VALUE)
93 OPENSSL_DECLARE_ERROR_REASON(ASN1, INTEGER_NOT_ASCII_FORMAT)
94 OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_MODIFIER)
95 OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_NUMBER)
96 OPENSSL_DECLARE_ERROR_REASON(ASN1, LIST_ERROR)
97 OPENSSL_DECLARE_ERROR_REASON(ASN1, MISSING_VALUE)
98 OPENSSL_DECLARE_ERROR_REASON(ASN1, NOT_ASCII_FORMAT)
99 OPENSSL_DECLARE_ERROR_REASON(ASN1, OBJECT_NOT_ASCII_FORMAT)
100 OPENSSL_DECLARE_ERROR_REASON(ASN1, SEQUENCE_OR_SET_NEEDS_CONFIG)
101 OPENSSL_DECLARE_ERROR_REASON(ASN1, TIME_NOT_ASCII_FORMAT)
102 OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_FORMAT)
103 OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_TAG)
104 OPENSSL_DECLARE_ERROR_REASON(ASN1, UNSUPPORTED_TYPE)
106 static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
108 static void asn1_put_length(unsigned char **pp, int length);
110 int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag,
111 int *pclass, long omax)
115 const unsigned char *p = *pp;
116 int tag, xclass, inf;
121 ret = (*p & V_ASN1_CONSTRUCTED);
122 xclass = (*p & V_ASN1_PRIVATE);
123 i = *p & V_ASN1_PRIMITIVE_TAG;
124 if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */
134 if (l > (INT_MAX >> 7L))
149 /* To avoid ambiguity with V_ASN1_NEG, impose a limit on universal tags. */
150 if (xclass == V_ASN1_UNIVERSAL && tag > V_ASN1_MAX_UNIVERSAL)
155 if (!asn1_get_length(&p, &inf, plength, max))
158 if (inf && !(ret & V_ASN1_CONSTRUCTED))
162 fprintf(stderr, "p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
163 (int)p, *plength, omax, (int)*pp, (int)(p + *plength),
167 if (*plength > (omax - (p - *pp))) {
168 OPENSSL_PUT_ERROR(ASN1, ASN1_R_TOO_LONG);
170 * Set this so that even if things are not long enough the values are
178 OPENSSL_PUT_ERROR(ASN1, ASN1_R_HEADER_TOO_LONG);
182 static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
185 const unsigned char *p = *pp;
186 unsigned long ret = 0;
199 if (i > sizeof(ret) || max < (long)i)
216 * class 0 is constructed constructed == 2 for indefinite length constructed
218 void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
221 unsigned char *p = *pp;
224 i = (constructed) ? V_ASN1_CONSTRUCTED : 0;
225 i |= (xclass & V_ASN1_PRIVATE);
227 *(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG);
229 *(p++) = i | V_ASN1_PRIMITIVE_TAG;
230 for (i = 0, ttag = tag; ttag > 0; i++)
241 if (constructed == 2)
244 asn1_put_length(&p, length);
248 int ASN1_put_eoc(unsigned char **pp)
250 unsigned char *p = *pp;
257 static void asn1_put_length(unsigned char **pp, int length)
259 unsigned char *p = *pp;
262 *(p++) = (unsigned char)length;
265 for (i = 0; l > 0; i++)
270 p[i] = length & 0xff;
278 int ASN1_object_size(int constructed, int length, int tag)
289 if (constructed == 2) {
301 if (ret >= INT_MAX - length)
306 int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
310 dst->type = str->type;
311 if (!ASN1_STRING_set(dst, str->data, str->length))
313 dst->flags = str->flags;
317 ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str)
322 ret = ASN1_STRING_new();
325 if (!ASN1_STRING_copy(ret, str)) {
326 ASN1_STRING_free(ret);
332 int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
335 const char *data = _data;
343 if ((str->length <= len) || (str->data == NULL)) {
346 str->data = OPENSSL_malloc(len + 1);
348 str->data = OPENSSL_realloc(c, len + 1);
350 if (str->data == NULL) {
351 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
358 OPENSSL_memcpy(str->data, data, len);
359 /* an allowance for strings :-) */
360 str->data[len] = '\0';
365 void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
368 OPENSSL_free(str->data);
373 ASN1_STRING *ASN1_STRING_new(void)
375 return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
378 ASN1_STRING *ASN1_STRING_type_new(int type)
382 ret = (ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
384 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
394 void ASN1_STRING_free(ASN1_STRING *a)
398 if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
399 OPENSSL_free(a->data);
403 int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
407 i = (a->length - b->length);
409 i = OPENSSL_memcmp(a->data, b->data, a->length);
411 return (a->type - b->type);
418 int ASN1_STRING_length(const ASN1_STRING *x)
420 return M_ASN1_STRING_length(x);
423 void ASN1_STRING_length_set(ASN1_STRING *x, int len)
425 M_ASN1_STRING_length_set(x, len);
429 int ASN1_STRING_type(ASN1_STRING *x)
431 return M_ASN1_STRING_type(x);
434 unsigned char *ASN1_STRING_data(ASN1_STRING *x)
436 return M_ASN1_STRING_data(x);
439 const unsigned char *ASN1_STRING_get0_data(const ASN1_STRING *x)