56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
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/* Copyright (c) 2014, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#ifndef OPENSSL_HEADER_BYTESTRING_INTERNAL_H
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#define OPENSSL_HEADER_BYTESTRING_INTERNAL_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* CBS_get_any_asn1_element sets |*out| to contain the next ASN.1 element from
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* |*cbs| (including header bytes) and advances |*cbs|. It sets |*out_tag| to
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* the tag number and |*out_header_len| to the length of the ASN.1 header. If
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* the element has indefinite length then |*out| will only contain the header.
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*
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* Tag numbers greater than 31 are not supported. */
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int CBS_get_any_asn1_element(CBS *cbs, CBS *out, unsigned *out_tag,
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size_t *out_header_len);
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/* CBS_asn1_ber_to_der reads an ASN.1 structure from |in|. If it finds
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* indefinite-length elements then it attempts to convert the BER data to DER
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* and sets |*out| and |*out_length| to describe a malloced buffer containing
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* the DER data. Additionally, |*in| will be advanced over the ASN.1 data.
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*
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* If it doesn't find any indefinite-length elements then it sets |*out| to
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* NULL and |*in| is unmodified.
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*
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* A sufficiently complex ASN.1 structure will break this function because it's
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* not possible to generically convert BER to DER without knowledge of the
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* structure itself. However, this sufficies to handle the PKCS#7 and #12 output
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* from NSS.
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*
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* It returns one on success and zero otherwise. */
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int CBS_asn1_ber_to_der(CBS *in, uint8_t **out, size_t *out_len);
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#if defined(__cplusplus)
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} /* extern C */
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#endif
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#endif /* OPENSSL_HEADER_BYTESTRING_INTERNAL_H */
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