boringssl/crypto/asn1/a_bool.c

/* 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 <openssl/err.h>
#include <openssl/mem.h>

int i2d_ASN1_BOOLEAN(ASN1_BOOLEAN a, unsigned char **pp) {
  int r;
  unsigned char *p, *allocated = NULL;

  r = ASN1_object_size(0, 1, V_ASN1_BOOLEAN);
  if (pp == NULL) {
    return r;
  }

  if (*pp == NULL) {
    if ((p = allocated = OPENSSL_malloc(r)) == NULL) {
      OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
      return -1;
    }
  } else {
    p = *pp;
  }

  ASN1_put_object(&p, 0, 1, V_ASN1_BOOLEAN, V_ASN1_UNIVERSAL);
  *p = a ? 0xff : 0x00;

  // If a new buffer was allocated, just return it back.
  // If not, return the incremented buffer pointer.
  *pp = allocated != NULL ? allocated : p + 1;
  return r;
}

ASN1_BOOLEAN d2i_ASN1_BOOLEAN(ASN1_BOOLEAN *a, const unsigned char **pp,
                              long length) {
  const unsigned char *p = *pp;
  long len;
  int inf, tag, xclass;
  inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
  if (inf & 0x80) {
    OPENSSL_PUT_ERROR(ASN1, ASN1_R_BAD_OBJECT_HEADER);
    return -1;
  }

  if (inf & V_ASN1_CONSTRUCTED) {
    OPENSSL_PUT_ERROR(ASN1, ASN1_R_TYPE_NOT_PRIMITIVE);
    return -1;
  }

  if (tag != V_ASN1_BOOLEAN || xclass != V_ASN1_UNIVERSAL) {
    OPENSSL_PUT_ERROR(ASN1, ASN1_R_EXPECTING_A_BOOLEAN);
    return -1;
  }

  if (len != 1) {
    OPENSSL_PUT_ERROR(ASN1, ASN1_R_BOOLEAN_IS_WRONG_LENGTH);
    return -1;
  }
  ASN1_BOOLEAN ret = (ASN1_BOOLEAN) * (p++);
  if (a != NULL) {
    (*a) = ret;
  }
  *pp = p;
  return ret;
}