Remove all the other ERR_R_MALLOC_FAILURES from the codebase. Also changes cbb to push to the error stack, to correctly report cbb failures instead of now only reporting malloc failures. Previously it turned all cbb failures into a malloc failure Bug: 564 Change-Id: Ic13208bf9d9aaa470e83b2f15782fc94946bbc7b Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/57046 Auto-Submit: Bob Beck <bbe@google.com> Commit-Queue: David Benjamin <davidben@google.com> Reviewed-by: David Benjamin <davidben@google.com>
285 lines
8.4 KiB
C
285 lines
8.4 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#include <openssl/asn1.h>
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#include <limits.h>
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#include <string.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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#include "../internal.h"
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#include "internal.h"
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int ASN1_BIT_STRING_set(ASN1_BIT_STRING *x, const unsigned char *d,
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ossl_ssize_t len) {
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return ASN1_STRING_set(x, d, len);
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}
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int asn1_bit_string_length(const ASN1_BIT_STRING *str,
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uint8_t *out_padding_bits) {
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int len = str->length;
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if (str->flags & ASN1_STRING_FLAG_BITS_LEFT) {
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// If the string is already empty, it cannot have padding bits.
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*out_padding_bits = len == 0 ? 0 : str->flags & 0x07;
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return len;
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}
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// TODO(https://crbug.com/boringssl/447): If we move this logic to
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// |ASN1_BIT_STRING_set_bit|, can we remove this representation?
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while (len > 0 && str->data[len - 1] == 0) {
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len--;
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}
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uint8_t padding_bits = 0;
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if (len > 0) {
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uint8_t last = str->data[len - 1];
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assert(last != 0);
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for (; padding_bits < 7; padding_bits++) {
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if (last & (1 << padding_bits)) {
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break;
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}
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}
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}
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*out_padding_bits = padding_bits;
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return len;
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}
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int ASN1_BIT_STRING_num_bytes(const ASN1_BIT_STRING *str, size_t *out) {
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uint8_t padding_bits;
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int len = asn1_bit_string_length(str, &padding_bits);
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if (padding_bits != 0) {
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return 0;
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}
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*out = len;
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return 1;
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}
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int i2c_ASN1_BIT_STRING(const ASN1_BIT_STRING *a, unsigned char **pp) {
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if (a == NULL) {
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return 0;
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}
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uint8_t bits;
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int len = asn1_bit_string_length(a, &bits);
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if (len > INT_MAX - 1) {
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OPENSSL_PUT_ERROR(ASN1, ERR_R_OVERFLOW);
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return 0;
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}
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int ret = 1 + len;
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if (pp == NULL) {
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return ret;
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}
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uint8_t *p = *pp;
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*(p++) = bits;
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OPENSSL_memcpy(p, a->data, len);
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if (len > 0) {
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p[len - 1] &= (0xff << bits);
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}
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p += len;
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*pp = p;
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return ret;
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}
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ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a,
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const unsigned char **pp, long len) {
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ASN1_BIT_STRING *ret = NULL;
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const unsigned char *p;
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unsigned char *s;
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int padding;
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if (len < 1) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_SHORT);
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goto err;
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}
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if (len > INT_MAX) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_LONG);
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goto err;
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}
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if ((a == NULL) || ((*a) == NULL)) {
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if ((ret = ASN1_BIT_STRING_new()) == NULL) {
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return NULL;
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}
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} else {
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ret = (*a);
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}
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p = *pp;
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padding = *(p++);
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len--;
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if (padding > 7) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_BIT_STRING_BITS_LEFT);
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goto err;
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}
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// Unused bits in a BIT STRING must be zero.
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uint8_t padding_mask = (1 << padding) - 1;
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if (padding != 0 && (len < 1 || (p[len - 1] & padding_mask) != 0)) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_BIT_STRING_PADDING);
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goto err;
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}
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// We do this to preserve the settings. If we modify the settings, via
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// the _set_bit function, we will recalculate on output
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ret->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); // clear
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ret->flags |= (ASN1_STRING_FLAG_BITS_LEFT | padding); // set
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if (len > 0) {
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s = OPENSSL_memdup(p, len);
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if (s == NULL) {
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goto err;
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}
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p += len;
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} else {
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s = NULL;
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}
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ret->length = (int)len;
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OPENSSL_free(ret->data);
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ret->data = s;
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ret->type = V_ASN1_BIT_STRING;
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if (a != NULL) {
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(*a) = ret;
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}
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*pp = p;
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return ret;
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err:
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if ((ret != NULL) && ((a == NULL) || (*a != ret))) {
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ASN1_BIT_STRING_free(ret);
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}
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return NULL;
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}
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// These next 2 functions from Goetz Babin-Ebell <babinebell@trustcenter.de>
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int ASN1_BIT_STRING_set_bit(ASN1_BIT_STRING *a, int n, int value) {
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int w, v, iv;
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unsigned char *c;
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w = n / 8;
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v = 1 << (7 - (n & 0x07));
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iv = ~v;
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if (!value) {
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v = 0;
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}
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if (a == NULL) {
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return 0;
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}
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a->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT | 0x07); // clear, set on write
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if ((a->length < (w + 1)) || (a->data == NULL)) {
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if (!value) {
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return 1; // Don't need to set
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}
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if (a->data == NULL) {
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c = (unsigned char *)OPENSSL_malloc(w + 1);
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} else {
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c = (unsigned char *)OPENSSL_realloc(a->data, w + 1);
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}
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if (c == NULL) {
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return 0;
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}
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if (w + 1 - a->length > 0) {
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OPENSSL_memset(c + a->length, 0, w + 1 - a->length);
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}
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a->data = c;
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a->length = w + 1;
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}
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a->data[w] = ((a->data[w]) & iv) | v;
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while ((a->length > 0) && (a->data[a->length - 1] == 0)) {
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a->length--;
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}
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return 1;
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}
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int ASN1_BIT_STRING_get_bit(const ASN1_BIT_STRING *a, int n) {
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int w, v;
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w = n / 8;
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v = 1 << (7 - (n & 0x07));
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if ((a == NULL) || (a->length < (w + 1)) || (a->data == NULL)) {
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return 0;
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}
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return ((a->data[w] & v) != 0);
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}
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// Checks if the given bit string contains only bits specified by
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// the flags vector. Returns 0 if there is at least one bit set in 'a'
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// which is not specified in 'flags', 1 otherwise.
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// 'len' is the length of 'flags'.
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int ASN1_BIT_STRING_check(const ASN1_BIT_STRING *a, const unsigned char *flags,
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int flags_len) {
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int i, ok;
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// Check if there is one bit set at all.
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if (!a || !a->data) {
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return 1;
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}
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// Check each byte of the internal representation of the bit string.
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ok = 1;
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for (i = 0; i < a->length && ok; ++i) {
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unsigned char mask = i < flags_len ? ~flags[i] : 0xff;
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// We are done if there is an unneeded bit set.
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ok = (a->data[i] & mask) == 0;
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}
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return ok;
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}
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