/* 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/bytestring.h>

#include <openssl/err.h>

#include <openssl/mem.h>

#include <openssl/obj.h>

#include "../bytestring/internal.h"

#include "../internal.h"

#include "internal.h"

int i2d_ASN1_OBJECT(const ASN1_OBJECT *in, unsigned char **outp) {

  if (in == NULL) {

    OPENSSL_PUT_ERROR(ASN1, ERR_R_PASSED_NULL_PARAMETER);

    return -1;

  }

  if (in->length <= 0) {

    OPENSSL_PUT_ERROR(ASN1, ASN1_R_ILLEGAL_OBJECT);

    return -1;

  }

  CBB cbb, child;

  if (!CBB_init(&cbb, (size_t)in->length + 2) ||

      !CBB_add_asn1(&cbb, &child, CBS_ASN1_OBJECT) ||

      !CBB_add_bytes(&child, in->data, in->length)) {

    CBB_cleanup(&cbb);

    return -1;

  }

  return CBB_finish_i2d(&cbb, outp);

}

int i2t_ASN1_OBJECT(char *buf, int buf_len, const ASN1_OBJECT *a) {

  return OBJ_obj2txt(buf, buf_len, a, 0);

}

static int write_str(BIO *bp, const char *str) {

  size_t len = strlen(str);

  if (len > INT_MAX) {

    OPENSSL_PUT_ERROR(ASN1, ERR_R_OVERFLOW);

    return -1;

  }

  return BIO_write(bp, str, (int)len) == (int)len ? (int)len : -1;

}

int i2a_ASN1_OBJECT(BIO *bp, const ASN1_OBJECT *a) {

  if (a == NULL || a->data == NULL) {

    return write_str(bp, "NULL");

  }

  char buf[80], *allocated = NULL;

  const char *str = buf;

  int len = i2t_ASN1_OBJECT(buf, sizeof(buf), a);

  if (len > (int)sizeof(buf) - 1) {

    // The input was truncated. Allocate a buffer that fits.

    allocated = OPENSSL_malloc(len + 1);

    if (allocated == NULL) {

      return -1;

    }

    len = i2t_ASN1_OBJECT(allocated, len + 1, a);

    str = allocated;

  }

  if (len <= 0) {

    str = "<INVALID>";

  }

  int ret = write_str(bp, str);

  OPENSSL_free(allocated);

  return ret;

}

ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **out, const unsigned char **inp,

                             long len) {

  if (len < 0) {

    return NULL;

  }

  CBS cbs, child;

  CBS_init(&cbs, *inp, (size_t)len);

  if (!CBS_get_asn1(&cbs, &child, CBS_ASN1_OBJECT)) {

    OPENSSL_PUT_ERROR(ASN1, ASN1_R_DECODE_ERROR);

    return NULL;

  }

  const uint8_t *contents = CBS_data(&child);

  ASN1_OBJECT *ret = c2i_ASN1_OBJECT(out, &contents, CBS_len(&child));

  if (ret != NULL) {

    // |c2i_ASN1_OBJECT| should have consumed the entire input.

    assert(CBS_data(&cbs) == contents);

    *inp = CBS_data(&cbs);

  }

  return ret;

}

ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **out, const unsigned char **inp,

                             long len) {

  if (len < 0) {

    OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_OBJECT_ENCODING);

    return NULL;

  }

  CBS cbs;

  CBS_init(&cbs, *inp, (size_t)len);

  if (!CBS_is_valid_asn1_oid(&cbs)) {

    OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_OBJECT_ENCODING);

    return NULL;

  }

  ASN1_OBJECT *ret = ASN1_OBJECT_create(NID_undef, *inp, (size_t)len,

                                        /*sn=*/NULL, /*ln=*/NULL);

  if (ret == NULL) {

    return NULL;

  }

  if (out != NULL) {

    ASN1_OBJECT_free(*out);

    *out = ret;

  }

  *inp += len;  // All bytes were consumed.

  return ret;

}

ASN1_OBJECT *ASN1_OBJECT_new(void) {

  ASN1_OBJECT *ret;

  ret = (ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));

  if (ret == NULL) {

    return NULL;

  }

  ret->length = 0;

  ret->data = NULL;

  ret->nid = 0;

  ret->sn = NULL;

  ret->ln = NULL;

  ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;

  return ret;

}

void ASN1_OBJECT_free(ASN1_OBJECT *a) {

  if (a == NULL) {

    return;

  }

  if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {

    OPENSSL_free((void *)a->sn);

    OPENSSL_free((void *)a->ln);

    a->sn = a->ln = NULL;

  }

  if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {

    OPENSSL_free((void *)a->data);

    a->data = NULL;

    a->length = 0;

  }

  if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC) {

    OPENSSL_free(a);

  }

}

ASN1_OBJECT *ASN1_OBJECT_create(int nid, const unsigned char *data, size_t len,

                                const char *sn, const char *ln) {

  if (len > INT_MAX) {

    OPENSSL_PUT_ERROR(ASN1, ASN1_R_STRING_TOO_LONG);

    return NULL;

  }

  ASN1_OBJECT o;

  o.sn = sn;

  o.ln = ln;

  o.data = data;

  o.nid = nid;

  o.length = (int)len;

  o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |

            ASN1_OBJECT_FLAG_DYNAMIC_DATA;

  return OBJ_dup(&o);

}