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/* Copyright (c) 2014, Google Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
#ifndef OPENSSL_HEADER_BYTESTRING_INTERNAL_H
#define OPENSSL_HEADER_BYTESTRING_INTERNAL_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
/* CBS_asn1_ber_to_der reads an ASN.1 structure from |in|. If it finds
* indefinite-length elements then it attempts to convert the BER data to DER
* and sets |*out| and |*out_length| to describe a malloced buffer containing
* the DER data. Additionally, |*in| will be advanced over the ASN.1 data.
*
* If it doesn't find any indefinite-length elements then it sets |*out| to
* NULL and |*in| is unmodified.
*
* A sufficiently complex ASN.1 structure will break this function because it's
* not possible to generically convert BER to DER without knowledge of the
* structure itself. However, this sufficies to handle the PKCS#7 and #12 output
* from NSS.
*
* It returns one on success and zero otherwise. */
OPENSSL_EXPORT int CBS_asn1_ber_to_der(CBS *in, uint8_t **out, size_t *out_len);
/* CBS_get_any_ber_asn1_element acts the same as |CBS_get_any_asn1_element| but
* also allows indefinite-length elements to be returned. In that case,
* |*out_header_len| and |CBS_len(out)| will both be two as only the header is
* returned. */
OPENSSL_EXPORT int CBS_get_any_ber_asn1_element(CBS *cbs, CBS *out,
unsigned *out_tag,
size_t *out_header_len);
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_BYTESTRING_INTERNAL_H */
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