bd42603943
An i2d compatibility function is rather long, so add CBB_finish_i2d for part of it. It takes a CBB as input so only a 'marshal' function is needed, rather than a 'to_bytes' one. Also replace the *inp d2i update pattern with a slightly shorter one. Change-Id: Ibb41059c9532f6a8ce33460890cc1afe26adc97c Reviewed-on: https://boringssl-review.googlesource.com/6868 Reviewed-by: Adam Langley <agl@google.com>
76 lines
3.4 KiB
C
76 lines
3.4 KiB
C
/* 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_asn1_ber_to_der reads a BER element from |in|. If it finds
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* indefinite-length elements or constructed strings then it converts the BER
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* data to DER and sets |*out| and |*out_length| to describe a malloced buffer
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* containing the DER data. Additionally, |*in| will be advanced over the BER
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* element.
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*
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* If it doesn't find any indefinite-length elements or constructed strings then
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* it sets |*out| to NULL and |*in| is unmodified.
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*
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* This function should successfully process any valid BER input, however it
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* will not convert all of BER's deviations from DER. BER is ambiguous between
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* implicitly-tagged SEQUENCEs of strings and implicitly-tagged constructed
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* strings. Implicitly-tagged strings must be parsed with
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* |CBS_get_ber_implicitly_tagged_string| instead of |CBS_get_asn1|. The caller
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* must also account for BER variations in the contents of a primitive.
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*
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* It returns one on success and zero otherwise. */
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OPENSSL_EXPORT int CBS_asn1_ber_to_der(CBS *in, uint8_t **out, size_t *out_len);
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/* CBS_get_asn1_implicit_string parses a BER string of primitive type
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* |inner_tag| implicitly-tagged with |outer_tag|. It sets |out| to the
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* contents. If concatenation was needed, it sets |*out_storage| to a buffer
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* which the caller must release with |OPENSSL_free|. Otherwise, it sets
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* |*out_storage| to NULL.
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*
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* This function does not parse all of BER. It requires the string be
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* definite-length. Constructed strings are allowed, but all children of the
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* outermost element must be primitive. The caller should use
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* |CBS_asn1_ber_to_der| before running this function.
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*
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* It returns one on success and zero otherwise. */
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OPENSSL_EXPORT int CBS_get_asn1_implicit_string(CBS *in, CBS *out,
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uint8_t **out_storage,
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unsigned outer_tag,
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unsigned inner_tag);
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/* CBB_finish_i2d calls |CBB_finish| on |cbb| which must have been initialized
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* with |CBB_init|. If |outp| is not NULL then the result is written to |*outp|
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* and |*outp| is advanced just past the output. It returns the number of bytes
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* in the result, whether written or not, or a negative value on error. On
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* error, it calls |CBB_cleanup| on |cbb|.
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*
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* This function may be used to help implement legacy i2d ASN.1 functions. */
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int CBB_finish_i2d(CBB *cbb, uint8_t **outp);
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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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