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- /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.] */
-
- #include <openssl/asn1.h>
-
- #include <limits.h>
- #include <string.h>
-
- #include <openssl/asn1_mac.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
-
- #include "../internal.h"
-
-
- /* Cross-module errors from crypto/x509/i2d_pr.c. */
- OPENSSL_DECLARE_ERROR_REASON(ASN1, UNSUPPORTED_PUBLIC_KEY_TYPE)
-
- /* Cross-module errors from crypto/x509/algorithm.c. */
- OPENSSL_DECLARE_ERROR_REASON(ASN1, CONTEXT_NOT_INITIALISED)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, DIGEST_AND_KEY_TYPE_NOT_SUPPORTED)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_MESSAGE_DIGEST_ALGORITHM)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_SIGNATURE_ALGORITHM)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, WRONG_PUBLIC_KEY_TYPE)
- /*
- * Cross-module errors from crypto/x509/asn1_gen.c. TODO(davidben): Remove
- * these once asn1_gen.c is gone.
- */
- OPENSSL_DECLARE_ERROR_REASON(ASN1, DEPTH_EXCEEDED)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_BITSTRING_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_BOOLEAN)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_HEX)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_IMPLICIT_TAG)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_INTEGER)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_NESTED_TAGGING)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_NULL_VALUE)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_OBJECT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, ILLEGAL_TIME_VALUE)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, INTEGER_NOT_ASCII_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_MODIFIER)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, INVALID_NUMBER)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, LIST_ERROR)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, MISSING_VALUE)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, NOT_ASCII_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, OBJECT_NOT_ASCII_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, SEQUENCE_OR_SET_NEEDS_CONFIG)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, TIME_NOT_ASCII_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_FORMAT)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, UNKNOWN_TAG)
- OPENSSL_DECLARE_ERROR_REASON(ASN1, UNSUPPORTED_TYPE)
-
- static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
- long max);
- static void asn1_put_length(unsigned char **pp, int length);
-
- int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag,
- int *pclass, long omax)
- {
- int i, ret;
- long l;
- const unsigned char *p = *pp;
- int tag, xclass, inf;
- long max = omax;
-
- if (!max)
- goto err;
- ret = (*p & V_ASN1_CONSTRUCTED);
- xclass = (*p & V_ASN1_PRIVATE);
- i = *p & V_ASN1_PRIMITIVE_TAG;
- if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */
- p++;
- if (--max == 0)
- goto err;
- l = 0;
- while (*p & 0x80) {
- l <<= 7L;
- l |= *(p++) & 0x7f;
- if (--max == 0)
- goto err;
- if (l > (INT_MAX >> 7L))
- goto err;
- }
- l <<= 7L;
- l |= *(p++) & 0x7f;
- tag = (int)l;
- if (--max == 0)
- goto err;
- } else {
- tag = i;
- p++;
- if (--max == 0)
- goto err;
- }
-
- /* To avoid ambiguity with V_ASN1_NEG, impose a limit on universal tags. */
- if (xclass == V_ASN1_UNIVERSAL && tag > V_ASN1_MAX_UNIVERSAL)
- goto err;
-
- *ptag = tag;
- *pclass = xclass;
- if (!asn1_get_length(&p, &inf, plength, max))
- goto err;
-
- if (inf && !(ret & V_ASN1_CONSTRUCTED))
- goto err;
-
- #if 0
- fprintf(stderr, "p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
- (int)p, *plength, omax, (int)*pp, (int)(p + *plength),
- (int)(omax + *pp));
-
- #endif
- if (*plength > (omax - (p - *pp))) {
- OPENSSL_PUT_ERROR(ASN1, ASN1_R_TOO_LONG);
- /*
- * Set this so that even if things are not long enough the values are
- * set correctly
- */
- ret |= 0x80;
- }
- *pp = p;
- return (ret | inf);
- err:
- OPENSSL_PUT_ERROR(ASN1, ASN1_R_HEADER_TOO_LONG);
- return (0x80);
- }
-
- static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
- long max)
- {
- const unsigned char *p = *pp;
- unsigned long ret = 0;
- unsigned long i;
-
- if (max-- < 1)
- return 0;
- if (*p == 0x80) {
- *inf = 1;
- ret = 0;
- p++;
- } else {
- *inf = 0;
- i = *p & 0x7f;
- if (*(p++) & 0x80) {
- if (i > sizeof(ret) || max < (long)i)
- return 0;
- while (i-- > 0) {
- ret <<= 8L;
- ret |= *(p++);
- }
- } else
- ret = i;
- }
- if (ret > LONG_MAX)
- return 0;
- *pp = p;
- *rl = (long)ret;
- return 1;
- }
-
- /*
- * class 0 is constructed constructed == 2 for indefinite length constructed
- */
- void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
- int xclass)
- {
- unsigned char *p = *pp;
- int i, ttag;
-
- i = (constructed) ? V_ASN1_CONSTRUCTED : 0;
- i |= (xclass & V_ASN1_PRIVATE);
- if (tag < 31)
- *(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG);
- else {
- *(p++) = i | V_ASN1_PRIMITIVE_TAG;
- for (i = 0, ttag = tag; ttag > 0; i++)
- ttag >>= 7;
- ttag = i;
- while (i-- > 0) {
- p[i] = tag & 0x7f;
- if (i != (ttag - 1))
- p[i] |= 0x80;
- tag >>= 7;
- }
- p += ttag;
- }
- if (constructed == 2)
- *(p++) = 0x80;
- else
- asn1_put_length(&p, length);
- *pp = p;
- }
-
- int ASN1_put_eoc(unsigned char **pp)
- {
- unsigned char *p = *pp;
- *p++ = 0;
- *p++ = 0;
- *pp = p;
- return 2;
- }
-
- static void asn1_put_length(unsigned char **pp, int length)
- {
- unsigned char *p = *pp;
- int i, l;
- if (length <= 127)
- *(p++) = (unsigned char)length;
- else {
- l = length;
- for (i = 0; l > 0; i++)
- l >>= 8;
- *(p++) = i | 0x80;
- l = i;
- while (i-- > 0) {
- p[i] = length & 0xff;
- length >>= 8;
- }
- p += l;
- }
- *pp = p;
- }
-
- int ASN1_object_size(int constructed, int length, int tag)
- {
- int ret = 1;
- if (length < 0)
- return -1;
- if (tag >= 31) {
- while (tag > 0) {
- tag >>= 7;
- ret++;
- }
- }
- if (constructed == 2) {
- ret += 3;
- } else {
- ret++;
- if (length > 127) {
- int tmplen = length;
- while (tmplen > 0) {
- tmplen >>= 8;
- ret++;
- }
- }
- }
- if (ret >= INT_MAX - length)
- return -1;
- return ret + length;
- }
-
- int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
- {
- if (str == NULL)
- return 0;
- dst->type = str->type;
- if (!ASN1_STRING_set(dst, str->data, str->length))
- return 0;
- dst->flags = str->flags;
- return 1;
- }
-
- ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str)
- {
- ASN1_STRING *ret;
- if (!str)
- return NULL;
- ret = ASN1_STRING_new();
- if (!ret)
- return NULL;
- if (!ASN1_STRING_copy(ret, str)) {
- ASN1_STRING_free(ret);
- return NULL;
- }
- return ret;
- }
-
- int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
- {
- unsigned char *c;
- const char *data = _data;
-
- if (len < 0) {
- if (data == NULL)
- return (0);
- else
- len = strlen(data);
- }
- if ((str->length <= len) || (str->data == NULL)) {
- c = str->data;
- if (c == NULL)
- str->data = OPENSSL_malloc(len + 1);
- else
- str->data = OPENSSL_realloc(c, len + 1);
-
- if (str->data == NULL) {
- OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
- str->data = c;
- return (0);
- }
- }
- str->length = len;
- if (data != NULL) {
- OPENSSL_memcpy(str->data, data, len);
- /* an allowance for strings :-) */
- str->data[len] = '\0';
- }
- return (1);
- }
-
- void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
- {
- if (str->data)
- OPENSSL_free(str->data);
- str->data = data;
- str->length = len;
- }
-
- ASN1_STRING *ASN1_STRING_new(void)
- {
- return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
- }
-
- ASN1_STRING *ASN1_STRING_type_new(int type)
- {
- ASN1_STRING *ret;
-
- ret = (ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
- if (ret == NULL) {
- OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
- return (NULL);
- }
- ret->length = 0;
- ret->type = type;
- ret->data = NULL;
- ret->flags = 0;
- return (ret);
- }
-
- void ASN1_STRING_free(ASN1_STRING *a)
- {
- if (a == NULL)
- return;
- if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
- OPENSSL_free(a->data);
- OPENSSL_free(a);
- }
-
- int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
- {
- int i;
-
- i = (a->length - b->length);
- if (i == 0) {
- i = OPENSSL_memcmp(a->data, b->data, a->length);
- if (i == 0)
- return (a->type - b->type);
- else
- return (i);
- } else
- return (i);
- }
-
- int ASN1_STRING_length(const ASN1_STRING *x)
- {
- return M_ASN1_STRING_length(x);
- }
-
- void ASN1_STRING_length_set(ASN1_STRING *x, int len)
- {
- M_ASN1_STRING_length_set(x, len);
- return;
- }
-
- int ASN1_STRING_type(ASN1_STRING *x)
- {
- return M_ASN1_STRING_type(x);
- }
-
- unsigned char *ASN1_STRING_data(ASN1_STRING *x)
- {
- return M_ASN1_STRING_data(x);
- }
-
- const unsigned char *ASN1_STRING_get0_data(const ASN1_STRING *x)
- {
- return x->data;
- }
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